2021 Acura RLX

the Acura RLX reflects the brand's new Precision Crafted Performance design direction, creating a more substantial and aspirational presence for Acura's top-of-the-line luxury sports sedan. (concept carz) In addition, the RLX benefits from significant upgrades to its interior design, materials and technology, including the addition of Traffic Jam Assist to the AcuraWatch™ suite of advanced safety and driver-assistive technologies, offered as standard equipment on all models.

The RLX, Acura's most powerful vehicle after the NSX supercar, also offers improved performance and response. Models equipped with Acura's proprietary three-motor Sport Hybrid SH-AWD® system benefit from a lighter hybrid battery pack (Intelligent Power Únit) and from improved control logic derived from the company's experience in development of the NSX. The 2018 Acura RLX with Precision All-Wheel Steer™ (P-AWS®) receives a new, more refined and responsive 10-speed automatic transmission. (posted on conceptcarz.com)

Powertrain
As the most sophisticated and powerful Acura sedan ever, the 2018 Acura RLX with Sport Hybrid Super-Handling All-Wheel Drive™ (SH- AWD™) shares technology with the NSX supercar, creating a powerful and precise driving experience unmatched in the segment. For 2018, Acura has simplified the RLX trim structure to make the brand's innovative Sport Hybrid technology more desirable and accessible by streamlining the offering to two well-equipped variants.

The 377- total system horsepower 2018 Acura RLX Sport Hybrid seamlessly integrates a direct-injected V6 with three electric motors and Super Handling All-Wheel Drive™ for instant acceleration, precise handling, outstanding all-weather performance and excellent fuel economy. Based on developments from the NSX supercar, the RLX Sport Hybrid powertrain and dynamic handling has been further optimized.

The 310-horsepower Acura RLX with Precision All-Wheel Steer™ is now mated to a new 10-speed Automatic Transmission (10AT) delivering a more responsive and refined driving experience, with improved acceleration and passing times. Engineered for high efficiency, low weight and low inertia, and an exceptionally wide ratio range, the 10-speed automatic maximizes the RLX's performance and fuel efficiency.

Body and Exterior
Inspired by the Acura Precision Concept, the dramatically restyled 2018 RLX and RLX Sport Hybrid exteriors are defined by new front and rear bodywork, side sills, wheels, lighting and trim. The innovations begin with Acura's signature diamond pentagon grille with chrome surround, which is integrated together with a powerfully sculpted hood, front fascia and bold chrome-trimmed lower air openings.

This design incorporates restyled LED daytime running lights (DRL), LED fog lights (RLX Sport Hybrid) and Jewel-Eye™ LED high- and low-beam headlights. The RLX lighting provides efficient, powerful down-the-road-illumination, with a windswept appearance that extends rearward to the new front fenders with their sculpted, muscular wheel arches.

The Acura RLX is complimented by six new exterior colors (seven total) including Fathom Blue Pearl and two premium paint offerings – Brilliant Red Metallic and Majestic Black Pearl.

Chassis
As a further development of the RLX, the 2018 RLX's handling and ride comfort have been further optimized for 2018. Developed to be true 'driver's cars,' the new RLX P-AWS and RLX Sport Hybrid both deliver improved linearity of yaw response. With a smooth and quiet ride, all-wheel steering on the RLX P-AWS and electric motor-powered torque vectoring on the RLX Sport Hybrid, the 2018 RLX lineup offers technology and performance unmatched by other vehicles in the competitive luxury segment.

Proven technologies that help define the RLX P-AWS and RLX Sport Hybrid as comfortable, confident and capable luxury sport sedans continue for 2018, including high-output Electric Power Steering (EPS), double-wishbone front and multi-link rear suspension, Amplitude Reactive Dampers, and a selectable Sport mode. Together, these advanced technologies allow the updated RLX and RLX Sport Hybrid to master driving conditions as disparate as city traffic and freeways, winding roads and wide-open rural Interstates, inclement weather conditions, and sudden emergency situations. Accurate, confident and fun-to-drive, the 2018 RLX and RLX Sport Hybrid represent the finest interpretation yet of Acura's top-of-the-line sport luxury sedan. (concept carz)

Key traits of the RLX chassis dynamics include:
•Agile and accurate cornering with linear response
•Smooth and connected, naturally fluid handling
•Outstanding high-speed stability
•Comfortable, flat and smooth ride
•Confident braking performance
•Outstanding steering feel
•Outstanding cabin quietness

Interior and Key Features
The RLX's interior is designed and engineered to provide a high degree of luxury, refinement, and technological sophistication, while supporting an engaging driving experience. With accommodating seating for five, highlighted by an unusually roomy rear seating area, the RLX combines versatility with welcoming passenger comfort. High-end premium elements include a soft-touch interior features, new alloy and woodgrain finishes and new standard upgraded Milano leather seating.

The Acura RLX receives redesigned seats featuring high-contrast piping and stitching, as well as a new Espresso interior color option, which adds sophistication to an interior with class- leading space and comfort.

Standard features on the RLX Sport Hybrid include premium Krell Audio System with 14 speakers, Surround View Camera, front and rear parking sensors, LED fog lights, remote engine start, ventilated and heated front seats, heated outboard rear seats, heated steering wheel and more.

Key Interior Features

•Úpgraded seat design with Milano leather
•Milano leather-wrapped steering wheel with Euro-style stitching
•Sophisticated interior styling with high-quality fit and finish
•Driver-oriented control layout
•Advanced and intuitive instrumentation and controls
•Shift-by-wire gear selector (now on both RLX models)
•Large trunk: 14.9 cu-ft. in RLX P-AWS; 12.0 cu-ft. in RLX Sport Hybrid
•Roomy 5-person interior with 102.1 cu-ft. of passenger volume
•Driver's and front passenger's 12-way power seats, including 4-way power lumbar
•Ventilated front seats (RLX Sport Hybrid)
•Head-Úp Instrument Display (RLX Sport Hybrid)

Key Comfort and Convenience Features

Safety and Driver Assistance
The RLX features the AcuraWatch™ suite of technologies as standard equipment, which has been enhanced with the addition of Traffic Jam Assist (TJA), a first for Acura. TJA helps reduce driver stress in highly congested traffic situations by helping keep the vehicle in its lane, effectively extending the lane-centering capabilities of the vehicle to include low-speed travel, while Adaptive Cruise Control with Low-Speed Follow maintains an interval between the RLX and the car detected ahead.

AcuraWatch™ also includes Collision Mitigation Braking System (CMBS) with Forward Collision Warning (FCW), Lane Keeping Assist (LKAS), Adaptive Cruise Control (ACC) with Low-Speed Follow, and Road Departure Mitigation (RDM) with Lane Departure Warning (LDW). AcuraWatch™ uses a millimeter wave radar and monocular camera sensing technology to detect other vehicles as well as lane markings and can help intervene to prevent or mitigate the severity of a collision.


The Acura RLX continues to offer two distinct high-performance powertrains. The front-wheel drive RLX P-AWS is powered by a responsive 3.5-liter Direct Injection SOHC i-VTEC® V6 engine rated at 310 horsepower and 272 lb.-ft. of torque (SAE net). The RLX engine also incorporates a range of advanced friction-reducing technologies that help boost fuel efficiency and power output. A special intake manifold design, special 'tumble' type intake ports, advanced piston crown shapes, an elevated 11.5:1 compression ratio and a variable-flow exhaust system are keys to the high power output. With i-VTEC® (intelligent Variable Valve Timing and Lift Electronic Control) for the intake valves combined with Variable Cylinder Management (VCM) that deactivates the rear bank of three cylinders for greater fuel efficiency, the RLX engine offers broad-spectrum power and fuel efficiency.

For even greater performance, the RLX Sport Hybrid SH-AWD combines the same 3.5-liter V6 with Acura's advanced three-motor Sport Hybrid all-wheel drive system to deliver a system total of 377 horsepower and 341 lb.-ft. of torque, making it the most powerful Acura sedan in history. In the Acura lineup, only the NSX supercar with its related hybrid powertrain is more powerful.

The RLX Sport Hybrid SH-AWD uses three electric motors: one integrated with the 7-speed dual-clutch transmission that turns with the crankshaft, and a pair of rear motors (Twin Motor Únit) that power the rear wheels. The Twin Motor Únit dynamically distributes electric-motor torque between the left and right rear wheels, providing both positive and negative torque vectoring (negative, through regenerative braking) to aid performance and handling. For 2018, the system features a new, lighter Li-Ion battery pack (-8.2 lbs.) and drive system operating logic enhancements derived from the NSX supercar.

Two transmissions are available in the 2018 RLX. The RLX P-AWS has an all-new, Acura-first 10-speed automatic transmission. (posted on conceptcarz.com) Engineered for high efficiency with low weight, low inertia and an exceptionally wide ratio range, the 10-speed automatic maximizes the RLX's performance and fuel efficiency. The RLX Sport Hybrid has a standard 7-Speed Dual-Clutch Transmission (DCT). The DCT offers quick gear changes and eliminates the need for a torque converter, which improves efficiency.

Both RLX powertrains offer exceptional fuel efficiency and emissions performance within their respective classes. RLX P-AWS has EPA fuel economy ratings of 20/29/23 mpg (city/highway/combined) and meets the CARB LEV3 ÚLEV125 Emissions standard. The RLX Sport Hybrid has EPA fuel economy ratings of 28/29/28 mpg (city/highway/combined) and meets the CARB LEV3 SÚLEV30 Emissions standards. ( posted on conceptcarz.com)

Powertrains at Glance
•3.5-liter, SOHC, V6 engine produces 310 horsepower at 6,500 rpm and 272 lb.ft. of torque at 4,500 rpm (RLX P-AWS)
•3.5-liter, SOHC, V6 engine produces 310 horsepower at 6,500 rpm and 273 lb.-ft. of torque at 4,700 rpm (RLX Sport Hybrid)
•i-VTEC® (intelligent Variable Valve Timing and Lift Electronic Control) for intake valves with VCM (Variable Cylinder Management)
•Computer-controlled Direct Injection (DI) with multi-hole fuel injectors
•11.5:1 compression ratio
•High-strength steel crankshaft
•X-shaped magnesium intake manifold
•Drive-by-Wire™ throttle system
•Direct ignition system™
•Detonation/knock control system
•Variable flow exhaust system
•Maintenance Minder™ system optimizes service intervals
•100,000 +/- miles tune-up interval

Three-Motor Hybrid System (RLX Sport Hybrid)
•3.5-liter, SOHC V6 and Sport Hybrid system produce total system power of 377 horsepower and 341 lb.-ft. of torque
•Sport Hybrid SH-AWD® (Super Handling All-Wheel Drive™)
•Front electric motor output: 47 horsepower
•Dual rear electric motor output: 36 horsepower X 2 (72 combined)
•New, lighter Li-Ion battery
•Eight-year/100,000-mile or ten-year/150,000-mile Li-Ion battery limited warranty, depending on the state of purchase/registration

Emissions/Fuel Economy Ratings
•High-flow, close-coupled next-generation precious metal catalytic converters plus under floor catalytic converter
•High capacity 32-bit RISC processor emissions control unit
•CARB LEV3 ÚLEV125 emissions compliant (RLX P-AWS)
•CARB LEV3 SÚLEV30 emissions compliant (RLX Sport Hybrid)
•EPA 20/29/23 mpg (city/highway/combined) fuel economy ratings (RLX P-AWS)
•EPA 28/29/28 mpg (city/highway/combined) fuel economy ratings (RLX Sport Hybrid)

Noise & Vibration (NV)
•60-degree cylinder V-angle for smooth operation
•Automatically tensioned, maintenance-free serpentine belt accessory drive
•Active Control engine Mount (ACM)
•Active sound control

Powertrain Control Features
•Electronic Gear Selector provides fully electronic push-button shift control with Sport mode button
•Steering wheel mounted racing-inspired paddle shifters
•Sport mode with remapped, more aggressive automatic shift points and more pronounced engine braking during deceleration
•Cooperative control between Drive-by-Wire™ throttle system and transmission makes for quicker, smoother shifts
•Advanced shift-hold control limits up shifts during spirited driving
•Grade Logic Control System reduces gear 'hunting' on steep hills

Engine Architecture
The RLX 3.5-liter VTEC® V6 has a smooth-firing 60-degree V-angle and compact overall dimensions. The V6 has a die-cast lightweight aluminum alloy block with cast-in-place iron cylinder liners. Direct injection combines with i-VTEC and Variable Cylinder ManagementÔ (VCMÔ) to give the RLX a potent blend of power and fuel efficiency.

In the RLX P-AWS, the aluminum-alloy 24-valve engine produces 310 horsepower at 6,500 and generates 272 lb.-ft. of torque at 4,500 rpm. In the RLX Sport Hybrid, slight calibration differences result in an identical peak horsepower figure combined with a small increase in torque output to 273 lb.-ft. at 4700 rpm.

The RLX P-AWS has an EPA fuel economy rating of 20/29/23 mpg (city/highway/combined); the RLX Sport Hybrid has an EPA fuel economy rating of 28/29/28 mpg (city/highway/combined).

Engine Block and Crankshaft
With its 60-degree V-angle, the RLX's V6 engine is inherently smooth and has compact overall dimensions that allow efficient packaging within the vehicle. The V6 has a die-cast lightweight aluminum alloy block with cast-in-place iron cylinder liners. Made with a centrifugal spin-casting process, the thin-wall liners are high in strength and low in porosity. The block incorporates a deep-skirt design with four bolts per bearing cap for rigid crankshaft support and minimized noise and vibration. The 3.5L V6 uses a high-strength steel crankshaft for reduced weight.

A cooling control spacer positioned in the water jacket surrounding the cylinders helps to maintain consistent operating temperature. Plateau honing of the cylinder linings further lowers internal friction by creating an ultra-smooth surface. This two-stage machining process uses two grinding processes instead of the more conventional single honing process. Plateau honing also enhances the long-term wear characteristics of the engine.

Pistons/Connecting Rods
Designed with special 'cavity-shaped' crowns, the pistons help maintain stable combustion and contribute to stratified-charge combustion. Ion-plated piston rings help reduce friction for greater operating efficiency. The compression ratio is 11.5:1. Heavy-duty steel connecting rods are forged in one piece and then the crankshaft connecting rods are 'crack separated' to create a lighter and stronger rod with an optimally fitted bearing cap.

Cylinder Heads/ Valvetrain
Like other Acura V6 powerplants, the RLX engine's 4-valve cylinder heads are a single-overhead-camshaft design, with the cams driven by the crankshaft via an automatically tensioned toothed belt. Made of low-pressure cast, low-porosity aluminum, each cylinder head incorporates a 'tumble port' design that improves combustion efficiency by creating a more homogeneous fuel-air mixture. An integrated exhaust manifold cast into each cylinder head reduces parts count, saves weight, improves flow and optimizes the location of the close-coupled catalyst.

i-VTEC Valve Control System
The RLX V6 engine combines Variable Cylinder Management (VCM) with Variable Valve Timing and Lift Electronic Control (VTEC), which changes the lift profile, timing and lift duration of the intake valves. A switching mechanism allows each cylinder to operate with low-rpm valve lift and duration or high-rpm lift and duration. The rear cylinder bank's valve gear can also leave all intake and exhaust valves closed to maximize fuel efficiency during cylinder deactivation.

The 'intelligent' portion of the system is its ability to vary valve operation based on the driving situation and engine rpm. At low rpm, the VTEC intake valve timing and lift are optimized (low lift, short duration) for increased torque, which allows a wide range of 3-cylinder operation. As engine speed builds past 5,000 rpm, the VTEC system transitions to a high-lift, long-duration intake cam profile for superior high-rpm engine power.

Variable Cylinder Management ™ (VCM™)
The RLX engine employs Acura's Variable Cylinder Management (VCM) cylinder deactivation technology. The VTEC system combines with Active Control engine Mounts (ACM) to allow the VCM system to operate with three cylinders in a wide range of situations to maximize fuel efficiency and lower emissions. When greater power is needed, the system switches seamlessly to 6-cylinder operation.

During startup, aggressive acceleration, or when climbing hills – any time high power output is required – the engine operates on all six cylinders. During moderate-speed cruising and at low or moderate engine loads, the system operates just the front bank of three cylinders.

VCM can tailor the working displacement of the engine to match the driving requirements from moment to moment. Since the system automatically closes both the intake and exhaust valves of the cylinders that are not used, pumping losses associated with intake and exhaust are eliminated and fuel efficiency gets a further boost. The system combines maximum performance and maximum fuel efficiency – two characteristics that don't typically coexist in conventional engines.

VCM deactivates specific cylinders by using the i-VTEC (intelligent Variable Valve-Timing and Lift Electronic Control) system to close the intake and exhaust valves while the Power Control Module (PCM) simultaneously cuts fuel to those cylinders. The spark plugs continue to fire in inactive cylinders to minimize plug temperature loss and prevent fouling induced from incomplete combustion during cylinder re-activation.

The system is electronically controlled, and uses special integrated spool valves in the cylinder heads. Based on commands from the system's electronic control unit, the spool valves selectively direct oil pressure to the rocker arms for specific cylinders. This oil pressure in turn drives synchronizing pistons that connect and disconnect the rocker arms.

The VCM system monitors throttle position, vehicle speed, engine speed, automatic-transmission gear selection and other factors to determine the correct cylinder activation scheme for the operating conditions. In addition, the system determines whether engine oil pressure is suitable for VCM switching and whether catalytic-converter temperature will remain in the proper range. Importantly, the drive-by-wire control is able to finely match torque in 6-cylinder and 3-cylinder combustion modes, making the transition between the two virtually unnoticeable.

Direct Injection System
Conventional engines using multi-port fuel injection mix fuel and air before they enter the combustion chamber. With direct injection, fuel is injected directly into each combustion chamber. This allows for better combustion and overall efficiency.

The RLX 3.5-liter V6 features a compact, high-pressure, direct-injection pump that allows both high fuel flow and pulsation suppression, while variable pressure control optimizes injector operation. A multi-hole injector delivers fuel directly into each cylinder (not to the intake port, as in conventional port fuel injection designs).

The multi-hole injectors can create the ideal stoichiometric fuel/air mixture in the cylinders for good emissions control. Theoretically, a stoichiometric mixture has just enough air to completely burn the available fuel. (concept carz)

Based on the operating conditions, the direct-injection system alters its function for best performance. Úpon cold engine startup, fuel is injected into the cylinders on the compression stroke. This creates a weak stratified charge effect that improves engine start-up and reduces exhaust emissions before normal operating temperature is reached.

Once the engine is fully warm for maximum power and fuel efficiency, fuel is injected during the intake stroke. This helps create a more homogeneous fuel/air mix in the cylinder that is aided by the high-tumble intake port design. This improves volumetric efficiency, and the cooling effect of the incoming fuel improves anti-knock performance.

Active Control Engine Mounts and Active Sound Control
A powerful 28-volt Active Control Engine Mount system (ACM) is used to minimize the effects of engine vibration as the VCM system switches cylinders on and off. The 28-volt ACM is a key factor in the VCM's broad range of operation in the RLX. Sensors alert the Electronic Control Únit (ECÚ) to direct ACM actuators positioned at the front and rear of the engine to cancel engine vibration. In the cabin of the RLX, an Active Sound Control system further reduces low frequency sound relating to the function of the VCM system.

Drive-by-Wire Throttle System
The RLX doesn't use a conventional throttle cable, but instead has smart electronics that 'connect' the throttle pedal to a throttle valve inside the throttle-body. The result is less under hood clutter and lower weight, as well as quicker and more accurate throttle actuation. Plus, specially programmed 'gain' between the throttle pedal and engine offers improved drivability and optimized engine response to suit specific driving conditions.

Acura's Drive-by-Wire throttle system establishes the current driving conditions by monitoring throttle pedal position, throttle valve position, engine speed (rpm) and road speed. This information is used to define the throttle control sensitivity that gives the RLX's throttle pedal a predictable and responsive feel. There are two different throttle profiles available in the RLX. When the transmission is in 'D'(Drive) the drive-by-wire system uses the normal profile. When the Sport mode is engaged by pressing the Sport button located near the shift lever, the system changes the throttle map to increase throttle opening relative to accelerator pedal position to enhance response feel.

Direct Ignition and Detonation/Knock Control
The RLX's Power Control Module (PCM) monitors engine functions to determine the best ignition spark timing. An engine block-mounted acoustic detonation/knock sensor 'listens' to the engine and, based on this input, the PCM can retard the ignition timing to prevent potentially damaging detonation. The 3.5L V6 has an ignition coil unit for each cylinder that is positioned above each spark plug's access bore.

Close-Coupled Catalysts and Variable Flow Exhaust System
The exhaust manifolds of the 3.5L V6 are cast directly into the aluminum cylinder heads to reduce weight, decrease parts count, and create more under hood space. The result of this casting design is that the two primary catalytic converters are positioned much closer to the combustion chambers. High-efficiency next-generation precious metal catalytic converters are mounted directly to the exhaust port of each cylinder head to enable extremely rapid converter 'light-off'after the engine starts. A significant weight savings is realized by eliminating traditional exhaust manifolds.

Downstream of the close-coupled catalytic converters, a hydroformed 2-into-1 collector pipe carries exhaust gases to a secondary catalytic converter located under the passenger cabin floorboard. This high-flow secondary catalytic converter has a large inlet and outlet to enhance exhaust flow. To balance the engine's need for quiet operation at low rpm and higher flow at high rpm, the RLX's dual exhaust system incorporates a variable flow rate feature. Pressure-operated exhaust valves in each silencer are closed in normal operation, reducing exhaust noise by as much as 8 dB. When the driver demands more performance from the RLX, rising exhaust gas pressure opens both valves. The additional exhaust flow ads five horsepower to the engine's peak output.

Emissions Control
The 2018 RLX P-AWS meets the tough CARB LEV3 ÚLEV125 emissions standards; the 2018 RLX Sport Hybrid utilizes a higher amount of precious metals in its catalysts to meet CARB LEV3 SÚLEV30 emissions standards. ( posted on conceptcarz.com)

A number of advanced technologies are factors in the emissions performance. The unique cylinder head-mounted close-coupled catalytic converters light off more quickly after engine start up, and a 32-bit RISC microprocessor within the powertrain control module (PCM) boosts computing power to improve the precision of spark and fuel delivery.

To further improve emissions compliance, the 3.5L V6 makes use of an after-cat design exhaust gas recirculation (EGR) system that allows cleaner, cooler EGR gas to be fed back into the intake system. An EGR system, especially one that delivers a cleaner/cooler charge, reduces pumping loss for better fuel efficiency.

Push-Button Start System
To ensure consistent starting, the RLX has a one-touch Push Button start system that maintains starter engagement until the engine starts. Should the driver release the Start button before the engine starts, the system will start the vehicle.

Noise & Vibration Control
With its 60-degree V-angle and compact, rigid and lightweight die-cast aluminum cylinder block assembly, the 3.5L V6 powerplant is exceptionally smooth during operation. Other factors that help reduce engine noise and vibration are a rigid forged-steel crankshaft, die-cast accessory mounts, and a stiff cast-aluminum oil pan that reduces cylinder block flex.

100,000 Mile Tune-up Intervals
The RLX's 3.5L V6 requires no scheduled maintenance for 100,000+/- miles or more, other than periodic inspections and normal fluid and filter replacements. The first tune-up includes water pump inspection, valve adjustment, replacement of the camshaft timing belt, and the installation of new spark plugs.

Maintenance Minder™ System
To eliminate unnecessary service stops while ensuring that the vehicle is properly maintained, the RLX has a Maintenance Minder™ system that continually monitors the vehicle's operating condition. When maintenance is required, the driver is alerted via a message on the Multi-Information Display (MID).

The Maintenance Minder™ system monitors operating conditions such as oil and coolant temperature along with engine speed to determine the proper service intervals. Depending on operating conditions, oil change intervals can be extended to a maximum of 10,000 miles, potentially sparing the owner considerable expenditures and inconvenience over the life of the vehicle. The owner-resettable system monitors all normal service parts and systems, including oil and filter, tire rotation, air-cleaner, automatic transmission fluid, spark plugs, timing belt, coolant, brake pads and more. To avoid driver distraction while the vehicle is being operated, maintenance alerts are presented on the MID when the ignition is first turned on.

Sport Hybrid Super Handling All-Wheel Drive™ (SH-AWD)
The RLX Sport Hybrid was the first production vehicle to employ an electric version of Super Handling All-Wheel Drive (SH-AWD), technology that later appeared in the NSX supercar and the MDX Sport Hybrid. Mechanical versions of SH-AWD have the ability to vary the amount of power sent to the rear axle, and to also vary rear power distribution between the left and right rear wheels via a longitudinally mounted drive shaft and rear differential with twin electronically controlled clutch packs.

In the RLX Sport Hybrid, the driveshaft and rear differential of a conventional all-wheel drive system is eliminated, replaced by twin 27-kilowatt (36-horsepower) electric motors that independently drive the left and right rear wheels. Each motor can also capture regenerative braking energy and apply negative (regenerative braking) torque to further enhance cornering capability.

Independent control of torque at all four wheels is a key feature of SH-AWD and its ability to enhance both dynamic handling and all-weather traction. When cornering, more positive (drive) torque is applied to the outside rear wheel, while negative (regenerative braking) torque can be applied to the inside rear wheel. This torque differential creates a yaw moment, producing sharper turn-in, more linear cornering, enhanced traceability and improved steering response with reduced understeer tendencies. In addition, since the system doesn't rely on the gasoline engine for torque, electric SH-AWD can create a larger torque difference between the left and right rear wheels, even during small throttle applications, at low engine speeds, or even during deceleration (such as lifting throttle mid-corner). This substantially magnifies the positive handling benefits of SH-AWD across a much wider range of driving conditions. New for 2018, torque distribution enhancements contribute to enhanced response linearity and stability.

Power Drive Únit (PDÚ)
The Power Drive Únit, packaged in the center of the vehicle beneath the center console, dictates the power management strategy of the RLX Sport Hybrid SH-AWD system, including motor power and battery recharge.

Intelligent Power Únit (IPÚ)
The Intelligent Power Únit is positioned above the Twin Motor Únit, behind the rear seatback. The IPÚ contains the hybrid system's lithium-ion battery, 12-volt DC/DC converter, junction board, and Electronic Control Únits (ECÚ) for the motors and the battery. The IPÚ is air-cooled via an integrated fan unit that draws air from inside the vehicle cabin via an intake duct located beneath the rear seats.

New Lithium-Ion Battery
The RLX Sport Hybrid's new advanced 72-cell lithium-ion battery is 8.2 lbs. lighter than the previous generation battery.

Front Electric Motor
A single 35-kilowatt (47-horsepower) electric motor is integrated with the 7-speed DCT. The motor's operating temperature is optimized by a temperature-controlled flow of Automatic Transmission Fluid (ATF) through the motor housing. By tightly controlling the motor temperature, the motor's constantly available rated output (both drive and regeneration) can be significantly improved.

Twin Motor Únit (TMÚ)
The RLX Sport Hybrid's Twin Motor Únit (TMÚ) is located between the rear wheels, where a differential on a conventional all-wheel-drive vehicle is typically mounted. Inside its die-cast aluminum housing are two electric motors positioned back-to-back. Each 27-kilowatt (36-horsepower) motor powers a single rear wheel and can also apply negative torque to the same wheel. A clutch allows each motor to be decoupled from its wheel in certain operating situations to improve efficiency.

Electrically Powered Air Conditioning Compressor
Since the RLX Sport Hybrid engine has an idle-stop feature, it is equipped with an electrically powered air conditioning compressor. This allows continuous air conditioning operation even when the gasoline engine is shut off.

Transmissions
Two different transmissions are available in the 2018 RLX. The RLX P-AWS has an all-new Acura-first 10-speed automatic transmission. (posted on conceptcarz.com) The RLX Sport Hybrid has a standard 7-Speed Dual-Clutch Transmission (DCT).

10-Speed Automatic Transmission
The RLX P-AWS has a standard new 10-speed automatic transmission. (posted on conceptcarz.com) Engineered for high efficiency with low internal inertia and an exceptionally wide ratio range, the 10-speed automatic maximizes the RLX's performance and fuel efficiency. The 10-speed is 22 lbs. lighter and has a 68 percent wider overall ratio range, with a 43 percent lower first gear and a 17 percent taller top gear, compared to the previous generation RLX's 6-speed automatic.

The 10AT is designed to be lightweight and compact. It features four planetary gear sets that work together to provide an exceptionally wide gear ratio spread. Its overall ratio spread of 10.15:1 compares with the 6.04:1 spread on the previous generation RLX 6-speed, a 68-percent increase. The 10AT also has substantially faster upshift and downshift performance than the previous 6-speed transmission. (posted on conceptcarz.com) For greater responsiveness, the 10AT is capable of 4-gear direct downshifts – from 10th gear to 6th, or from 7th to 3rd.

To maximize fuel efficiency and minimize interior noise, the transmission's 10th gear is exceptionally tall, resulting in quiet and relaxed cruising rpm.

7-Speed Dual-Clutch Transmission (DCT)
To maximize performance and fuel efficiency, the RLX Sport Hybrid has a standard 7-Speed Dual-Clutch Transmission (DCT). In the 7-speed DCT, one clutch controls the odd gears while the other clutch controls the even gears. This arrangement allows gear
changes with a much smaller interruption in power to the wheels, resulting in millisecond-quick shifts. Compared to a conventional manual transmission, the operation of the clutches and shifting mechanisms are electronically controlled, eliminating the need for a clutch pedal or shift lever. Compared to a conventional automatic, the torque converter and its mechanical inefficiencies are also eliminated.

Common Transmission Features

Electronic Gear Selector
In the RLX Sport Hybrid, and for the first time ever in the non-Hybrid RLX, the conventional console-mounted shift lever is replaced with an Electronic Gear Selector. Park, Neutral and Drive are selected with the push of a button. Reverse is selected by pulling back a dedicated switch. Indicator lights near the buttons indicate the mode selected. As an added safety feature, if the vehicle is brought to a stop in Drive, the system will automatically select Park if the driver's seatbelt is unbuckled and the driver's door is opened.

Automatic Modes
Both RLX transmissions can be operated in two different fully automatic modes. The D (or 'Drive') mode is ideal for most driving situations, and combines fuel efficiency with smooth operation and responsive power when needed. The SPORT mode (selected with the SPORT button near the transmission controls) is meant for more demanding driving, and features more aggressive shift mapping to keep engine rpm higher for greater acceleration and pulling power.

When in the D mode (optimized for normal driving), the transmission incorporates an advanced Grade Logic Control System, Shift Hold Control and Cornering G Shift Control – all of which reduce unwanted shifting and gear hunting. The result is smart transmission operation that optimizes fuel efficiency and keeps the transmission in the appropriate gear for driving conditions, generating excellent performance and smooth operation.

While ascending or descending hills, Grade Logic Control alters the transmission's shift schedule to reduce shift frequency and improve speed control. The transmission ECÚ continually measures throttle position, vehicle speed and acceleration/deceleration to determine when the vehicle is on a hill. The shift schedule is then adjusted – during ascents to hold the transmission in lower gears to boost climbing power, and during descents to provide greater engine braking.

Shift Hold Control keeps the transmission in its current (lower) gear ratio during aggressive driving, as in the case of decelerating at a corner entry. Shift Hold Control leaves the chassis undisturbed by eliminating excess shifting and ensures that power will be immediately available (without a downshift) at the corner exit. When the system detects a sufficient speed differential between the rear wheels (10AT), or sufficient lateral acceleration (7DCT), it will suppress any unwanted upshifts. This prevents the transmission from upshifting during a corner, which could upset the chassis balance thus requiring downshifting again at the corner exit when the throttle is applied.

Paddle Shifters
Both available RLX transmissions feature a steering wheel-mounted paddle shifter system that lets the driver take manual control of transmission gear selection. Particularly useful in mountainous terrain or during aggressive driving, the paddles give the driver greater control over transmission operation. On long downgrades, the driver can command downshifts with the paddles that allow engine braking to be used to reduce the load on the brakes and help control the RLX's downhill speed.

Paddle Shifter Operation in Drive Mode
While in Drive mode, special transmission logic programming allows the use of the steering-wheel-mounted paddle shifters. When the driver operates the paddle shifters, the transmission responds to the driver's shift command and then returns to its normal fully automatic mode if further paddle shift inputs are not made within a few seconds depending upon driving conditions. Long holds of the upshift paddle also allows return to automatic mode. This special logic makes it easy for the driver to command a quick downshift without leaving the convenience of Drive mode.

Paddle Shifter Operation in Sequential Mode
By pressing the SPORT button, Sequential mode is engaged. This mode offers automatic operation with more aggressive shift mapping. A pull on either of the paddle shifters places the transmission in manual mode until another mode of operation is selected. A digital display in the instrument cluster indicates which gear the transmission is in.

In the 7DCT, a double-kick-down feature lets the driver command a sporty double downshift. By pulling on the left downshift paddle twice in rapid succession, the transmission will drop directly to the chosen lower gear ratio. With both transmissions, the Drive-by-Wire™ throttle system also creates a 'blip' of the throttle to help match gear speeds while downshifting.

To prevent harm to the powertrain when the transmission is paddle shifted by the driver (including during -down shifts), the system will inhibit potentially damaging shifts, and upshift if needed to avoid over-revving. As an added safety measure, the Electronic Control Únit (ECÚ) can also cut off fuel to the engine to prevent over-revving. On downshifts, the transmission will not execute a driver command that will over-rev the engine.

For improved stop-and-go performance and to help prevent 'lugging' the engine, the RLX will automatically downshift to an appropriate gear even though the transmission has been left in a higher gear, as the vehicle comes to a stop.

Grade Logic Control
While traveling up or down hills, Grade Logic Control alters the transmission's shift schedule to reduce shift frequency and improve speed control. A shift map in the transmission computer continually measures throttle position, vehicle speed and acceleration/deceleration, and then determines when the vehicle is on a hill. The shift schedule is then adjusted to hold the transmission in lower gears to boost climbing power or to provide engine braking when traveling downhill.

Shift Hold Control
Shift Hold Control logic keeps the transmission in its current (lower) gear ratio when aggressive driving is detected, as in the case of decelerating at a corner entry. Shift Hold Control leaves the chassis undisturbed by excess shifting and ensures that power will be immediately available (without a downshift) at the corner exit.

Cooperative Control
Both shift performance and smoothness are improved by cooperative control between the Drive-by-Wire™ throttle system and the electronically controlled transmission. (posted on conceptcarz.com) The engine is throttled by the engine management system during upshifts and downshifts so the function of the engine and transmission can be closely choreographed for faster, smoother shifting. As a result, the peak g-forces (or 'shift shock') are reduced significantly during upshifts and downshifts.

Acura RLX - Body and Exterior


Inspired by the Acura Precision Concept, the dramatically restyled 2018 RLX exterior is defined by new front and rear bodywork, side sills, wheels, lighting and trim. The innovations begin with Acura's signature diamond pentagon grille with chrome surround, which is integrated together with a powerfully sculpted hood, front fascia and bold chrome-trimmed lower air openings. This design DNA incorporates restyled LED Daytime Running Lights (DRL), LED fog lights (RLX Sport Hybrid model) and Jewel-Eye™ LED high- and low-beam headlights. The RLX lighting provides aerodynamically efficient, powerful down-the-road-illumination, with a windswept appearance that extends rearward to the new front fenders with their sculpted, muscular wheel arches.

Precision Crafted Design
Performance design features returning for 2018 include an 'aero-fused' cabin silhouette. Wide but also extremely aerodynamic, the cabin design allows both a roomy interior and a quiet ride as air slips smoothly over the flush-mounted acoustic glass and other drag- and turbulence-reducing design details. Close tolerances for the wheel wells and body-panel gaps add a further degree of elegance and aerodynamics. Adding a functional and dynamic flair along the body sides for 2018 are the new bright-trimmed lower sills, which improve aerodynamic airflow. Athletically contoured, the sills flow into the new rear fenders, lower trunk panel and rear bumper with an aerodynamically functional rear diffuser finished in gloss black, chrome edge trim, and chrome dual trapezoidal exhaust finishers.

Beneath the vehicle is a sophisticated series of aerodynamic aids that further smooth airflow. These include an engine undercover, left and right floor covers, left and right mid under covers, and a rear under cover. Aggressive 19-inch aluminum alloy wheels are standard on all RLX models. An available Surround-View Camera System offers six selectable viewing angles, including a highly useful bird's eye view. Numerous other exterior features add luxury and usability to the RLX, including a one-touch power moonroof, power folding outside mirrors, high-performance all-season tires, remote keyless entry, and standard rain-sensing windshield wipers.

Low Mass, High Gloss
The RLX utilizes numerous aluminum components to lower the overall vehicle mass, which helps to improve acceleration, steering and handling response, road-holding, braking performance, fuel efficiency, emissions, and crash safety. Aluminum components include the front and rear bumper beams, front fenders, hood, steering column mounting beam, floor pan, and door skins. Seven different exterior colors, including four metallic and three pearl, are designed to complement the exterior shape and the way light defines it. New exterior badging includes the Acura marque and Acura, RLX, SH-AWD and Hybrid emblems (as dictated by model).

Summary of Body Technologies

RLX P-AWS and Sport Hybrid
•55-percent high-strength steel including 1500mps 'hot stamped' steel
•Aluminum hood, front fenders, door skins, bumper beams, floor pan and steering column mounting beam
•Acoustic-laminated glass (windshield, front and rear side glass)
•Heated side mirrors with reverse-gear tilt-down
•Jewel-Eye™ LED low- and high-beam headlights
•Multi-angle rearview camera with dynamic guidelines (RLX P-AWS)
•Power moonroof with tilt, auto-open/close, auto-reverse and key-off operation
•Rain-sensing windshield wipers
•Frameless windshield wiper blades*'
•Smart Entry

Additional on RLX Sport Hybrid
•Auto-dimming side mirrors
•Power-folding side mirrors
•Front windshield de-icer
•LED fog lights
•Parking sensors (2 front/4 rear)
•Surround View Camera System

Exterior Dimensions
In overall length, the restyled RLX measures 197.8 inches – 1.7 inches longer than the 2017 model; however, its wheelbase, at 112.2 inches, remains the same, providing an ideal balance of ride quality and interior roominess – particularly for the rear passengers, thanks to an impressive 38.8 inches of rear legroom.

At 74.4 inches wide, the new RLX remains the same width as the previous model, and its revised styling provides a uniquely sporty and athletic visual presence. At 57.7 inches high, the 2018 RLX also mirrors the 2017 model in overall height.

Hot Stamped Steel
Últra-high strength 'hot stamped' 1500 Mpa steel is used in key areas for enhanced safety collision performance, particularly in narrow offset, side impact and roof strength tests. The hot-stamp steel is used in these areas:
•Side sills
•Side roof
•A pillars and roof edge to C pillar
•B pillars

Aluminum Body Components
Extensive use of aluminum in key areas saves 76.1 pounds compared to traditional all-steel construction, providing high strength with lightweight that directly benefits ride, handling, fuel efficiency, emissions reductions and safety. The biggest weight savings from a single component comes from the use of an aluminum hood, which saves 19.6 pounds compared to a steel hood. Aluminum body components include:
•Hood
•Front bumper beam
•Front fenders
•Floor tunnel bar
•Rear bumper beam
•Steering-column hangar beam
•Front door skin
•Rear door skin

Aluminum Hybrid Construction Door
The RLX doors are a hybrid construction utilizing aluminum outer panels for lighter weight and steel inner panels for stiffness and crash safety. Together, they provide for increased stiffness with a weight reduction of 24.3 pounds compared to all-steel doors.

The front doors are constructed of four parts, while the rear doors are constructed of five parts. The steel inner panel uses a special high-corrosion-protection zinc, aluminum and magnesium plating – 11 percent aluminum, 3 percent magnesium and 86 percent zinc – to assure that electrolytic corrosion does not occur between the two metals. This plating gives the steel inner panel 10 times the resistance of traditional zinc galvanized plating.

The outer aluminum skin and steel inside panels are joined with an Acura-first 'curl forming' process for high-strength and durability.

Class-Leading Aerodynamics
More than 800 wind-tunnel tests were conducted to fine tune the RLX's aerodynamic values. As a result, the 2018 RLX will have class-leading lower coefficient of lift (CL) and lower coefficient of drag (Cd).

Sound Insulation
Engineers paid particular attention to reducing interior noise, an effort that extends to literally every aspect of the vehicle's design and engineering – from aerodynamics and powertrain engineering to insulators and the selection of finishing materials – all play a part in the RLX's improved interior quietness.

To achieve a premium level of interior quietness, the RLX receives an unprecedented amount of acoustic material in key areas. The list includes:
•Carpet back surface
•Inside front/rear door lining
•Inside A-pillars
•Inside C-pillars
•Roof area behind moonroof opening
•Floor sills
•Inside trunk lid
•Rear deck
•Rear bulkhead
•Rear wheel wells

To mitigate additional sound from the hybrid drive motors, the RLX Sport Hybrid features additional application of sound deadening materials in the rear passenger floor and trunk floor insulators.

Acoustic Door Glass
The 2018 RLX uses laminated, sound-insulating acoustic glass for all door glass, providing an extra measure of wind and road noise attenuation. The glass is 4.7mm thick and includes an acoustic membrane that helps attenuate frequencies above 1,600 Hz, resulting in a particularly quiet interior.

Jewel-Eye™ LED Headlights
The 2018 RLX features a dramatic new array of high-intensity LED lamps to deliver outstanding light distribution, and class-leading distant irradiation performance and light characteristics with a wavelength close to the human eye's luminosity curve. With five lights per headlight, the LED lights provide improved down the road visibility compared to HID and halogen headlights.

On each side of the RLX, the low beams consist of four LED lights, with the eight individual lenses clearly and dramatically visible even in bright sunlight. The innermost high beams utilize a single larger LED, while the redesigned daytime running lights (DRL) adopt a new surrounding, wing shaped design. Altogether, they create a dramatic and distinctive appearance with superior lighting capability.

Light Distribution
Both the low- and separate high-beam Acura Jewel-Eye™ LED headlights offer outstanding performance in all nighttime driving conditions, including highway, winding roads, intersections, and in inclement weather conditions. The result is that the driver can see further with uniformity, making high-speed nighttime driving easier and less fatiguing.

A summary of LED benefits includes:
•Outstanding light distribution that surpasses competitors
•Excellent distant illumination performance
•Clear illumination of the road surface and white lines
•High visibility of the entire visible color spectrum (white, red, green, blue and yellow) compared to HID and halogen headlights
•Response time when switching between low and high beam is shortened
•Light congruity is improved between low and high beams

When the lights are off, sunlight enters through the top of the lens, reflects off the rear reflector and then forward and through the lens again. As a result, when the lighting is off, the array still appears to be shining.

LED Fog Lights
On the RLX Sport Hybrid, LED fog lights to enhance visibility and safety in inclement weather. Four individual LED elements make up each fog light.

LED Taillights
The restyled RLX taillights use a combination of bold periphery LED illumination and five horizontal rows of thinner LED lights to create a highly visible, dramatic and unique presence. Semi-circular amber LED light paths mark the rear corners of the RLX, simultaneously serving as both the taillights and the side marker lights. Inset are the slender red LED elements, which add substance and a dynamic, wing-like appearance at night. All of the LED shapes compliment the RLX body design, and integrate with the bright chrome strip that extends across the rear of the vehicle. Backup lights are located above the taillights, integrated into the chrome trim.

Power-Folding Side Mirrors
At the driver's preference, the RLX Sport Hybrid's door mirrors can be configured to automatically retract when the doors are locked, and then automatically extend when the doors are unlocked. This automatic mirror retract/extend function helps safeguard the mirrors when the RLX Sport Hybrid is parked, while also creating a higher-quality experience for the driver by eliminating the need to remember to manually retract or extend the mirrors.

The mirrors automatically retract or extend in two ways: 1) simply press the lock/unlock button on the remote key fob; or 2) press the lock button on the door handle.

Alternatively, the mirrors can be retracted and extended by using the mirror switch on the driver's door panel. These functions can be customized through the MID on the instrument panel.

Auto-Dimming Side Mirrors
The RLX Sport Hybrid features electro-chromatic side mirrors that can automatically dim during nighttime driving to reduce glare from the headlights of following vehicles.

Rain-Sensing Wipers
Both RLX models include rain-sensing wipers that automatically activate if water is detected on the windshield. Designed to cover the maximum possible windshield area, the left (driver) and right (front passenger) windshield wipers are 26 and 20 inches long, respectively.

Intelligent Wipers
Laws in some states require drivers to turn on the headlights when the wipers are operating in the rain. The RLX helps its driver comply with these laws by automatically illuminating the headlights when the wipers are activated in rainy conditions (with headlight switch in Auto). Operation is shown via an indicator on the instrument panel. If rain is intermittent, the lights stay on for a predetermined interval before automatically turning off again.

Wiper operation is equally advanced for maximum wiping area, better wiping quality, reduced weight, improved appearance and longer blade life. Details include:
•Wiper coverage is maximized by controlling the wiper position, including to the outer corners of the windshield.
•Wiper performance is maximized by adjusting the wiper speed according to road speed and wind pressure.
•The wiper motor uses a built-in ECÚ, reducing overall complexity of the system.
•For better appearance, the wipers are hidden under the hood when not in operation.
•For extended life of the wiper blades' rubber, the operating system periodically raises the wiper blades from underneath the hood (when not in use) to prevent blade deformation.

Windshield De-Icer
On the RLX Sport Hybrid, a new de-icer feature is designed to clear the windshield of ice in cold and wintery conditions. Inside the laminated acoustic windshield is an invisible conductive film that quickly heats the glass when an electrical current is applied. While driving, the windshield de-icer is designed to activate automatically when the outside temperature drops below 39.2 degrees Fahrenheit, and then to deactivate when the temperature rises to 42.8 degrees Fahrenheit.

Self-Opening Trunk
The RLX trunk has a self-opening feature that fully opens the trunk lid. There are three ways to open the trunk: 1) by pressing the trunk opener switch located on the driver side door panel, 2) with the key fob and 3) with the trunk opener switch located in the middle of the trunk, underneath the trunk lid garnish. This makes it easier for the RLX driver to carry items and open the trunk lid at the same time. The trunk lid closes manually.

Trunk Storage
The RLX offers 14.9 cu. ft. of cargo volume, while the RLX Sport Hybrid has 12.0 cu. ft. of cargo volume (all measurements include the tool kit and the temporary spare tire and wheel). The trunk features a flat floor design that extends from the bumper to the rear seatback for improved usability. Below the floor panel is a pair of useful covered storage wells. (See the Interior section for more information.)

Multi-Angle Rearview Camera
The RLX's standard multi-angle rearview camera features three viewing angles – Wide view, Normal view and Top Down view. Drivers may select the preferred view according to driving conditions.

Dynamic guidelines display the vehicle's backward trajectory according to steering-wheel position. When the steering wheel is straight, a broad 180-degree rearward view can be seen in Wide View, and Normal and Top Down views are also available. When the steering wheel is turned 90 degrees, only Wide and Normal views are available, and dynamic guidelines curve onscreen to show the predicted path of the vehicle.

Surround-View Camera System
In the RLX Sport Hybrid, four exterior cameras provide a 360-degree view on the navigation display of the space immediately around the vehicle. A 'Camera' button among the navigation display controls – or else a conveniently located button on the end of the turn signal lever – changes camera views.

When Drive is selected:
•Pressing either 'Camera' button shows a 360-degree view combined with a front view that is ideal for positioning the vehicle in a garage.
•Pressing either 'Camera' button again provides a front wide-angle view that is useful for helping spot an approaching vehicle or person when nosing out of a tight spot with a blocked side view.
•Additional views include looking ahead from both sides, and a passenger side view only.
•Dynamic guidelines appear in each front view, corresponding to the angle of the front wheels and the vehicle's predicted forward path.

When Reverse is selected:
•The rear camera view appears onscreen along with an overhead 360-degree view.
•Pressing either 'Camera' button shows a rear view only, and another press shows a wide-angle rear view only.
•Dynamic guidelines appear in each rear view, corresponding to the angle of the front wheels and the vehicle's predicted rearward path.

Exterior Colors
The 2018 RLX is available in seven exterior colors (six new), including four metallic and three pearl colors. All colors have a strong character, offering expressive contrasts that complement the RLX's reinvigorated body-panel curves and angles, while also exhibiting a smart luxury appearance. Available for the first time is Fathom Blue Pearl and two premium colors—Brilliant Red Metallic and Majestic Black Pearl. For all exterior colors, the acid-resistant epoxy clear-coat paint is superior to typical clear-coat paints for increased resistance to urban pollutants.

Acura RLX Exterior Colors
•NEW Brilliant Red Metallic
•NEW Majestic Black Pearl
•NEW Fathom Blue Pearl
•NEW Lunar Silver Metallic
•NEW Modern Steel Metallic
•NEW Crystal White Pearl
•Gilded Pewter Metallic

Acura RLX Interior Colors
•Ebony
•Espresso
•Graystone
•Seacoast

Acura RLX - Chassis

The 2018 RLX's handling and ride comfort have been further optimized for 2018. Developed to be true 'driver's cars,' the new RLX P-AWS and RLX Sport Hybrid both deliver improved linearity of yaw response. With a smooth and quiet ride, all-wheel steering on the RLX P-AWS and electric motor-powered torque vectoring on the RLX Sport Hybrid, the 2018 RLX lineup offers technology and performance unmatched by other vehicles in the competitive luxury segment.

Powerful Technology
Proven technologies that help define the RLX P-AWS and RLX Sport Hybrid as comfortable, confident and capable luxury sport sedans continue for 2018, including high-output belt-type Electric Power Steering (EPS), double-wishbone front and multi-link rear suspension, front and rear Amplitude Reactive Dampers, and a selectable Sport mode. Together, these advanced technologies allow the updated RLX and RLX Sport Hybrid to master driving conditions as disparate as city traffic and freeways, winding roads and wide-open rural Interstates, inclement weather conditions, and sudden emergency situations. Accurate, confident and fun-to-drive, the 2018 RLX P-AWS and RLX Sport Hybrid represent the finest interpretation yet of Acura's flagship sedan. (concept carz)

Key traits of the RLX chassis dynamics include:
•Agile and accurate cornering with linear response
•Smooth, connected and naturally fluid handling
•Outstanding high-speed stability
•Comfortable, flat and smooth ride
•Confident braking performance
•Outstanding steering feel
•Low NVH properties

Summary of Chassis Technology

RLX P-AWS
•Precision All-Wheel Steer™ (P-AWS®) and Agile Handling Assist
•Sport Mode
•Front Aluminum Subframe
•Double-Wishbone, Lower Double-Joint Front Suspension
•Multi-Link Rear Suspension
•Amplitude Reactive Dampers
•High-Output Electric Power Steering (EPS)
•Rigid Steering Column
•4-Wheel Disc Brakes
•Electric Parking Brake + Automatic Brake Hold
•Vehicle Stability Assist™ (VSA®)
•Tire Pressure Monitoring System (TPMS)
•Noise-Reducing Aluminum Alloy Wheels
•245/40 R19 All-Season Tires
•19 x 8.0 inch aluminum alloy wheels
•18.5-gallon Fuel Capacity
•Capless Fueling System

RLX Sport Hybrid (in addition or instead of)
•Sport Hybrid Super Handling All-Wheel Drive (SH-AWD)
•Electric Servo Brakes
•15.1-gallon fuel capacity

Precision All-Wheel Steer™ (FWD RLX only) and Agile Handling Assist
Precision All-Wheel Steer™ (P-AWS®) and Agile Handling Assist are standard on the front-wheel-drive RLX. This combination of technologies helps the RLX driver smoothly and easily trace the desired line with minimal steering-wheel inputs. The result is extremely linear dynamic performance in all driving conditions, which directly helps RLX perform at the will of the driver.

Precision All-Wheel Steer® (P-AWS®)
Standard on the front-wheel-drive 2018 RLX, Precision All-Wheel Steer™ (P-AWS®) is an all-electric left/right independent rear-wheel toe angle control system. Benefits of the system include:
•Minimized turning radius with neater execution of sharp low-speed turns
•Improved response for quick steering maneuvers such as lane changes
•Enhanced agility and nimbleness at roundabouts and intersections
•More confidence and control on curved highway on- and off-ramps
•Greater agility on winding roads
•Increased straight-line highway stability
•Confident braking stability
•Improved high speed response and stability in winter driving and when Vehicle Stability Assist™ (VSA®) is activated

System Operation
Key components of P-AWS® include independent electrically assisted left/right actuators, special control arms and suspension uprights, and an electronic control unit that is linked via a dedicated Control Area Network (CAN) to the Electric Power Steering (EPS), Vehicle Stability Assist® (VSA™), braking and engine control systems.

In operation, P-AWS® continuously monitors and calculates the correct amount of rear-toe angle input necessary for conditions, analyzing steering input, engine and road speed, transmission, throttle position, brake pressure, yaw rate, lateral acceleration and other factors. The maximum amount of rear-wheel toe angle adjustment is 2.0 degrees in either direction (positive or negative) for a total range of 4.0 degrees.

There are four fully automatic levels of P-AWS system operation to match such driving situations such as turning at an intersection, driving on windy roads, when merging or exiting a highway, higher speed maneuvers or in snowy conditions. The P-AWS® system provides confidence-building cornering capability through improved responsiveness and vehicle control.

Examples include:
•When the driver initiates a lane-change maneuver requiring that the RLX neatly move into the next lane, the P-AWS® system adjusts the rear wheel toe angles in phase (the same direction) with the front wheels enabling quick, clean maneuvering.
•For sharp low-speed turns, such as on city streets or in parking lots, the P-AWS® system adjusts the rear wheels toe angles out of phase (the opposite direction) with the front wheels. This results in a tighter turning radius.
•When tracing the lines of a twisty road – and helping the RLX track confidently in snowy conditions – the P-AWS® system counteracts understeer by helping introduce yaw – the necessary rotational effect – through the corner.

Sport Mode
A driver-selectable Sport mode further enhances driving dynamics across a wide range of driving situations. These include:
•Revised drivetrain-related mapping for increased acceleration
•To match the improved acceleration, steering and braking systems were tuned to: •Avoid larger than intended steering inputs via reduced steering assist
•Further increase brake effectiveness (RLX Sport Hybrid)

Front Aluminum Subframe
The RLX's front aluminum subframe is specifically designed to support the high performance of the double-wishbone front suspension and Electric Power Steering (EPS) systems. Úsing die-cast front corners, the subframe is especially lightweight and rigid. This directly contributes to the vehicle's agile and light handling, straight-line stability, high fuel efficiency, flat cornering and pleasing ride comfort, and smooth and precise steering feel (with minimal torque steer tendencies).

The RLX subframe is matched to the Active Control Engine Mount (ACM) system that is engineered specifically for the RLX's higher-output engine and Variable Cylinder Management (VCM) system.

Double Wishbone, Lower Double-Joint Front Suspension
The RLX's double-wishbone, lower double-joint front suspension provides highly intuitive handling agility, driver confidence and security, and ride sophistication. The system includes a lower double joint with a split lower control arm, optimized kingpin geometry, upper control arm, hydraulic compliance bushing, special dual-stage Amplitude Reactive Dampers, and a stabilizer bar that is heat treated for high strength.

Two front stabilizer bar specifications are used: the front-wheel drive RLX has a 32 mm diameter tubular steel front stabilizer bar with a tubing wall thickness of 3.9 mm. The RLX Sport Hybrid also uses a 32 mm diameter tubular front stabilizer bar, but with a thinner 3.5 mm tubing wall thickness that results in reduced stabilizer bar stiffness.

All RLX models use a 24.6 mm diameter rear stabilizer bar with 3.6 mm tubing wall thickness, hardened with a special shot-peening process.

Multi-Link Rear Suspension
Like the double-wishbone, lower double-joint front suspension, the RLX's multi-link rear suspension with Amplitude Reactive Dampers provides optimal handling agility, driver confidence and ride sophistication. The multi-link system geometry is optimized for a flat ride during cornering, confident turning capability, and a sophisticated ride in a variety of urban, highway and open road scenarios. The system includes multi-link control arms, control-arm bushings that are optimized for the best blend of NVH isolation and handling precision, Amplitude Reactive Dampers, and a rear stabilizer bar.

Amplitude Reactive Dampers
Amplitude Reactive Dampers provide superior ride comfort and handling in all driving conditions. The dampers have two separate damping mechanisms: one that is tuned for maximum efficiency on smoother roads with small, higher-frequency inputs; and the other that is tuned to handle larger, low-speed damper inputs such as rough roads, potholes, and sudden steering and braking action. The result is a vehicle that remains composed and comfortable in a wide range of driving conditions.

The Amplitude Reactive Dampers are a purely mechanical system that does not require electronic controls. Their core technology is two separate damping pistons, including a main piston and a second piston. To improve overall ride comfort, when smaller inputs occur during normal driving conditions, only the main piston works to provide the ideal damping characteristics. To improve the RLX's ride and handling during more severe conditions, the second piston operates to provide additional damping force.

High-Output Electric Power Steering (EPS)
The RLX's Electric Power Steering (EPS) system uses a high-output electric motor with a belt-drive system to increase the torque available and assist the driver in steering the vehicle. The result is smooth and instantaneous response, direct feel, and improved low-speed agility and high-speed stability.

The variable gear ratio system is designed and tuned to provide the two most essential characteristics in a high-performance luxury vehicle's steering. These include a smooth initial response (short delay) at the start of steering input, and great linearity response (steering force camber increase) as input is increased. As a result, the RLX's high-output EPS provides agile performance in low-speed driving maneuvers such as at intersections, improved overall accuracy and road feel, and superb high-speed stability.

Rigid Steering Column
The RLX steering column is a highly rigid design with an aluminum bracket and resin angular bearing. The resulting stiffness gives maximum driver steering feedback along with minimizing vibration felt in the wheel.

The large-diameter steering shaft and the stiff but lightweight aluminum support bracket and angular bearing yield maximum vibration-damping characteristics for a more luxurious driving experience.

Electrically actuated tilt and telescoping adjustment makes it easy to set the steering wheel to the ideal position for drivers of different sizes.

4-Wheel Disc Brakes with ABS and Brake Assist
Both 2018 RLX models are equipped with 4-wheel disc brakes with a 4-channel anti-lock braking system (ABS) for confident stops. The front discs on the RLX P-AWS measure 12.3 inches in diameter, while the front discs on the RLX Sport Hybrid measure 13.0 inches in diameter. Both RLX models feature 12.2-inch rear disc brakes.

ABS independently modulates braking power at each wheel to help the driver retain steering control during heavy braking, while Brake Assist recognizes emergency braking situations and almost instantly applies full braking force when appropriate.

The brake pads are a high-friction type for peak stopping performance even under strenuous conditions. The brake calipers are designed to reduce brake drag when not in use, reducing rolling resistance and improving fuel efficiency in the process.

The Hydraulic Brake Boost (HBB) improves brake pedal feel by utilizing a hydraulic boost system with a 10-in. high-pressure master cylinder. The system automatically and continuously analyzes and interprets the driver's brake-pedal inputs and adjusts the braking force to suit.

Electric Servo Brakes
The RLX Sport Hybrid's electric servo brake system maximizes regenerative braking capability for improved fuel efficiency. The mechanical braking system is hydraulic from the master cylinder to the 4-wheel disc brakes, just like a traditional braking system. The key difference is that the braking function is electronically controlled rather than a purely mechanical activation. This allows for the application of regenerative braking by the front and rear electric motors to slow the vehicle, rather than the hydraulic friction brakes, under most circumstances, with the additional of mechanical (friction) braking in hard stops. Besides its payoff in efficiency, the system offers excellent feel and feedback for the driver through the brake pedal.

When the driver applies the brake pedal, a signal is sent to the vehicle's Electronic Control Únit (ECÚ), which determines the appropriate amount of braking force to assign to regenerative braking through the electric drive motor and to the hydraulic friction braking system. In many cases, friction braking is not needed until the vehicle speed drops below 9 mph, as the vehicle slows to a final stop. When the ECÚ determines that friction braking is needed, the dual hydraulic master cylinder pumps brake fluid through the system. Midway between the master cylinder and the calipers is a separate motorized electronic actuator. This actuator receives an electronic signal, generated in the master cylinder module that precisely defines how the driver has applied the brakes – soft or hard, slow or fast. The actuator then directly apportions hydraulic pressure to the brake calipers at each wheel.

While the front-wheel-drive RLX uses a 10-inch vacuum booster to assist the driver in applying needed brake pressure, the all-wheel-drive RLX Sport Hybrid with regenerative braking uses an electric servo brake actuator.

Reactive Force Pedal
The RLX Sport Hybrid includes Reactive Force Pedal technology. In Normal mode, the system measures vehicle speed and dynamically varies pedal force to help the driver in applying the optimal amount of throttle for both spirited performance and good fuel economy. In slippery conditions, the system can also help the driver apply the optimal amount of driving force while minimizing wheel slip, utilizing input from the Vehicle Stability Assist™ (VSA®) system. In the event that the Collision Mitigation Brake System™ (CMBS™) detects that a frontal collision is imminent, the Reactive Force Pedal will push back on the driver's foot even before the CMBS system activates its visual and auditory alerts.

Electric Parking Brake + Automatic Brake Hold
The combination of Electric Parking Brake (EPB) and Automatic Brake Hold significantly reduce the effort of driving the vehicle, raising overall comfort and convenience.

Electric Parking Brake
The Electric Parking Brake (EPB) makes using the parking brake easier and more comfortable. Actuating the parking brake is as simple as pulling a button on the center console. To release the parking brake, the driver simply presses on the accelerator pedal. In addition to being simpler, more convenient and more comfortable to use than a traditional parking brake, the Electric Parking Brake makes hill starts easier when the RLX is parked on a grade.

The ease of use also promotes the use of the parking brake. As with a traditional manually activated parking brake, EPB functions on the rear wheels only.

Automatic Brake Hold
Automatic Brake Hold retains brake pressure when the vehicle is stopped, simplifying driving in heavy traffic or hills. This frees the driver from continually pressing the brake pedal to maintain the vehicle in a stopped position, a significant improvement in driving enjoyment in difficult conditions.

Operating the system requires two simple actions from the driver:
•Activating/deactivating the system via a switch on the center console.
•Pressing on the brake pedal when the vehicle comes to a stop.

Once these steps are taken, Automatic Brake Hold will indicate engagement and then maintain brake pressure when the vehicle has come to a stop, even if the driver releases the brake pedal. The RLX then remains stopped – even on a hill – until the driver presses the accelerator pedal. At this point, Automatic Brake Hold releases the brakes and the vehicle resumes normal braking function.

Vehicle Stability Assist™ (VSA®)
The RLX's high-efficiency Vehicle Stability Assist™ (VSA®) works in conjunction with the ABS and the Drive-by-Wire throttle systems. The VSA system enhances vehicle stability when cornering. If vehicle understeer or oversteer is detected, the system selectively reduces power and/or applies braking force to individual wheels to help correct the condition and stabilize the vehicle.

Traction control monitors front-wheel slippage, such as when starting on slick surfaces or patches of ice. If it is detected, traction control activates one or more brake calipers and reduces engine torque to slow the spinning wheel so it can regain traction.

Tire Pressure Monitoring System (TPMS)
A standard direct type Tire Pressure Monitoring System (TPMS) helps the driver maintain proper air pressure to improve driving safety and fuel efficiency, as well as reduce wear and tear on the vehicle's tires. Located in the instrument panel, a TPMS icon illuminates to alert the driver whenever any of the tires has a significantly low-pressure reading that requires the driver's attention. The current pressure for each tire in PSI can also be displayed.

Noise-Reducing Wheels
Both RLX models feature 19x8-inch aluminum alloy wheels as standard equipment.
The RLX P-AWS wheels are painted Pewter gray and machined finished. The RLX Sport Hybrid wheels feature a sporty shark gray color and machined finish.

All RLX wheels have a special noise-reducing design that lowers noise by 6 dB across the audible frequency range (200 to 230 Hertz). The key elements of the noise-reducing function are a resonator and a resin molding that are applied in a band on the inside of the rim. The result is reduced noise resonance in the air column inside the wheel. One important benefit of the noise-reducing wheel technology is a noticeable reduction in audible thumping or bumping noises when the RLX crosses expansion joints on the roadway.

All-Season Tires
Michelin Primacy MXM4 245/40R19 high-performance all-season tires are standard equipment on both RLX models. To maximize trunk volume, the both models also feature an easy-to-use tire repair kit (TRK).

18.5-Gallon Fuel Capacity
The RLX's 18.5-gallon fuel-tank capacity (15.1 gallons on the RLX Sport Hybrid) gives an ample cruising range. Both the fuel tank and fuel pipe are molded of high-density polyethylene for low weight, freedom from corrosion, impact resistance and fuel vapor losses. The fuel tank is located in a protected area in front of the rear suspension to help improve safety performance in the event of a collision.

Acura RLX - Interior

Key Comfort and Convenience Features
•Smart Entry and Push Button Start/Stop
•Remote engine start (RLX Sport Hybrid)
•Hill Start Assist
•Auto-dimming rearview mirror
•Electric Parking Brake with Brake Hold

Key Audio and Connectivity Features
•Acura/ELS® Studio Premium 14-speaker audio system (RLX P-AWS)
•Krell® ultra-premium 14-speaker audio system (RLX Sport Hybrid)
•Pandora® and Aha™ integration
•SMS text messaging function with compatible cell phones and e-mail function with compatible cell phones
•ÚSB port connectivity (for iPod®, iPhone®, or 'memory stick' storage devices)
•Auxiliary jack interface (for external MP3 music players)
•Bluetooth® HandsFreeLink® wireless telephone interface with auto-pairing
•Acura Navigation System with Voice Recognition™ and 8-inch screen
•Surface street and highway traffic
•Traffic rerouting
•GPS-linked climate control
•Next-generation AcuraLink™ with Standard, Connect or Premium Package

The RLX's Acura Satellite-Linked Navigation System uses GPS technology and a 60 GB hard disk drive based (HDD) system to provide drivers with turn-by-turn guidance to their chosen destination. The system adds surface street traffic data for the RLX and provides coverage in many areas within the Ú.S., allowing the driver to choose faster, less congested routes. The system offers a high level of convenience, with AcuraLink. Owners can send a destination to the vehicle in advance of trip using AcuraLink (with the optional Connect Package), or while on the road via the AcuraLink Concierge operator (with the optional Premium Package) or the interactive voice response system (with the Connect Package).

The RLX navigation system features an 8-inch high-resolution WVGA (800x480 pixel) backlit color display. The system can be controlled by voice, or with a convenient interface dial. The voice-activation system can respond to casual command phrases that require less user familiarization, in addition to the previous capability of being able to understand spoken city and street names. For example, a voice request for 'Radio 98.3 FM' can be spoken in approximately a dozen different ways ranging from 'change the radio station to 98.3' to just saying '98.3 FM.' This logic applies to audio functionality of the audio/information screen. The navigation system can also be controlled by voice with conventional navigation commands like, 'Find nearest Chinese restaurant' or 'Find nearest ATM.'

The audio system is automatically muted when the 'Talk' button is pressed. The voice-recognition technology allows the driver to simply speak city and street names aloud, and the system responds by displaying the matches available in the database. Points of interest on the map (such as restaurants or grocery stores) can be displayed with brand logo icons, or the system can provide turn-by-turn navigation – all by voice command. The massive point-of-interest (POI) database includes telephone numbers that can be dialed by using the Bluetooth® HandsFreeLink® system when the driver's cellular telephone is connected to the system.

The Acura Navigation System uses Global Positioning Satellites (GPS) in combination with detailed information from the vehicle's mapping system to pinpoint the vehicle's location and to provide a host of useful mapping and route guidance features. The antenna can utilize up to 12 satellites from a network of 24 global positioning satellites. If the antenna is obstructed by a tunnel, a parking garage or a tall building, an internal gyroscopic system and a speed sensor track the location of the vehicle so that the map information remains current and reliable. The vehicle clock is independently controlled by GPS data, so when time zones are crossed while driving, the clock will automatically set itself to the current time.

The RLX's navigation screen can display regularly updated traffic information including traffic flow, incidents and construction on freeways, and on surface streets. The information is from Probe Traffic, a system that tracks the movements of participating Acura (and other) vehicles to generate up-to-date flow information. Participants opt into the Probe Traffic system to receive flow information, which is anonymous and scrubbed of any personal information. The flow information is transmitted via the RLX's embedded cellular data link and is graphically displayed on the navigation system.

The system can automatically recalculate a 'detour' route and display a pop-up box signifying the route change, when traffic congestion or road incidents are detected along the selected drive route. Alternately, the driver can recalculate a route in manual mode simply by selecting 'TRAFFIC INCIDENTS' from the Map Info menu followed by selecting the 'AVOID' command relevant to an incident.

A digital version of the Zagat Survey® restaurant guide provides detailed information and reviews on select restaurants in the database. The reviews can be read on-screen or spoken over the audio system by a synthesized voice.

The navigation system can also suggest scenic routes based on the National Scenic Byways and All-American Roads guide. The Ú.S. Secretary of Transportation recognizes certain roads as All-American Roads or National Scenic Byways based on one or more archeological, cultural, historic, natural, recreational and scenic qualities. Scenic-route information for 126 routes can be accessed from inside the 'Information' menu and is displayed on the map as a green-and-red segmented line.

Acura RLX - Safety and Driver Assistance

Útilizing a host of advanced active and passive safety features, including AcuraWatch, the redesigned 2018 RLX further elevates occupant safety performance and convenience in Acura's top-of-the-line sport luxury sedan. (concept carz) The RLX P-AWS achieved a 5-Star Overall Vehicle Score safety rating from the NHTSA. Its impressive suite of safety technologies includes the Advanced Compatibility Engineering™ (ACE™) body structure, which utilizes a series of interconnected front frame members to absorb and redirect collision energy around the passenger cabin in a frontal collision.

The RLX makes strategic use of high-strength steel to enhance collision protection in frontal, side, rear impact and rollover incidents. The RLX has seven, smart-deploying airbags – driver and front-seat passenger front and side airbags, side-curtain airbags, and a driver's knee airbag. In the RLX Sport Hybrid, the driver and front passenger seats also feature e-pretension seat belts that maintain a low-level of tension (for improved comfort) in normal driving and pre-tension in the event of a collision.

Summary of Safety Technologies
•ACE™ body structure
•Driver and front passenger front and side airbags
•Side curtain airbags
•Driver's Side Knee Airbag
•Adjustable head restraints
•Driver and front seat passenger seat belt e-pretensioners (RLX Sport Hybrid)
•Road Departure Mitigation (RDM) with Lane Departure Warning (LDW)
•Collision Mitigation Braking System™ (CMBS™) with Forward Collision Warning (FCW) and head-up warning

Crash Safety Ratings
The 2018 RLX P-AWS received 5-Star ratings in all NHTSA tests, while also achieving a 5-Star Overall Vehicle Score.

Structural Safety Features
Meeting the RLX's top crash-safety rating targets required numerous structural engineering advancements. Details include:
•Frontal – The next-generation Advanced Compatibility Engineering™ (ACE™) body structure helped the 2017 RLX P-AWS pass the stringent IIHS Small Overlap Frontal Crash Test with the highest possible 'Good' result.
•Side – The use of sophisticated advances in collision load pathways and the use of hot-stamped high-strength steel helps improve occupant protection in side impact scenarios and should lead to top NHTSA and IIHS side-impact ratings.
•Rear – Rear-impact performance meeting the federal FMVSS301 fuel-system integrity standard is achieved by sophisticated engineering specifications and the use of lightweight high-strength steel.
•Rollover/Roof Strength – The RLX achieves the federal FMVSS216a roof crush resistance standard by adopting hot-stamped high-strength steel and optimized engineering specifications.

Next-Generation Advanced Compatibility Engineering™ (ACE™)
The 2018 RLX utilizes Acura's Advanced Compatibility Engineering™ (ACE™) body-structure technology to enhance occupant protection and crash compatibility in frontal collisions. This design maximizes energy absorption around the engine compartment and minimizes it in the passenger compartment.

The ACE™ body structure utilizes a network of connected structural elements – and utilizing 55-percent hot-stamp and high-strength steel – to distribute and direct crash energy away from the passenger compartment. This sophisticated frontal crash energy management helps to reduce the forces transferred to the passenger compartment and can help to more evenly disperse the forces transferred to other vehicles in a crash. Additionally, ACE™ helps minimize the potential for under-ride or over-ride situations that can happen during frontal impacts with a larger or smaller vehicle.

Únlike most conventional designs that direct frontal crash energy only to the lower load-bearing structures in the front end, ACE™ actively channels frontal crash energy to both upper and lower structural elements, including the floor frame rails, side sills and A-pillars. By creating specifically engineered 'pathways' that help distribute these frontal impact forces through a greater percentage of the vehicle's total structure, ACE™ can more effectively route them around and away from the passenger compartment to help limit cabin deformation and further improve occupant protection. Integral to the next- ACE™ concept is its unique front polygonal main design structure. (See the Body and Exterior section for more information.)

Airbags
A total of seven airbags, including advanced front airbags, front side airbags, side-curtain airbags with rollover sensors, and a driver's side knee airbag, are standard on the 2018 RLX.

Advanced Front Airbags (SRS)
The RLX is equipped with advanced front airbags (SRS). One or both of these airbags will be deployed only in the event of a sufficient frontal impact. If deployed, the airbags are capable of being inflated at different rates depending on crash severity, seat-belt usage and other factors. Front airbags are designed to supplement the seat belts to help reduce the likelihood of head and upper body injuries in frontal crashes.

Driver's Side Knee Airbag (SRS)
A driver's side knee airbag is designed to increase driver protection in the event of a frontal collision. The knee airbag is contained beneath a panel on the underside of the instrument panel, which is contoured away from the knees to provide as much clearance as possible for comfort.

Front Passenger Airbag-Off Indicator
An indicator light marked 'PASS AIRBAG,' located on the right of the upper display illuminates to indicate that the passenger's front airbag is off and will not deploy during a frontal impact. This happens when the weight of the front-seat passenger, or an object on the seat, is 63.8 pounds or less.

Driver and Front Passenger Side Airbags
Driver's and front passenger's side airbags mounted in the outboard area of each front seatback are designed to help provide pelvis and thorax protection in the event of a severe side impact. The advanced design allows the side airbags to inflate with a low risk of injuring the seat occupant while deploying.

Side Curtain Airbags with Rollover Sensor
All outboard seating positions include a side curtain airbag system. The side curtain airbags deploy from modules in the roof in the event of a sufficient side impact or rollover, providing a significant level of head protection in the window area. The side curtain airbags have a rollover sensor, a wide deployment profile, and remain fully deployed for an extended time to enhance passenger ejection mitigation.

Adjustable Head Restraints for All Seating Positions
All front and rear seating positions feature individually adjustable head restraints. Featuring Acura's latest generation of neck protection performance, the front head restraints offer a wide area of support, and are also contoured to allow the head-to head restraint clearance needed for peak driving comfort. The rear head restraints likewise comply with the latest Federal Motor Vehicle Safety Standards (FMVSS) that specify the size, position and operation of the rear-seat head restraints.

Front Seatbelt E-Pretensioners
The RLX features seatbelt e-pretensioner for both of the front seats that detects yaw rate. During aggressive driving or in the event of sudden steering inputs, such as a skid or a light collision, the e-pretensioner system uses electronic controls to tighten the seatbelts. During normal driving conditions, the e-pretensioner provides a 'tensionless' seatbelt experience, enhancing driving comfort. The e-pretensioner system is fully automatic and requires no intervention from the driver or front passenger, aside from the initial extension and fastening of the seatbelt.

Child Safety Features
Two Lower Anchors and Tethers for CHildren (LATCH) child seat-mounting positions are built into the outboard rear seats. The LATCH system utilizes both an upper child-seat tether anchor and dedicated lower-anchor points that are built into the body of the vehicle, which help ensure correct mounting of a compatible child seat. A third upper tether is located in the rear center position. The RLX also features childproof rear door locks. When engaged, they permit the rear doors to be opened only from the outside, thereby helping to prevent accidental opening by a child.

AcuraWatch™
Included as standard equipment on both the 2018 RLX P-AWS and RLX Sport Hybrid, AcuraWatch™ is a suite of advanced safety and driver-assist technologies. AcuraWatch™ technologies include Collision Mitigation Braking System™ (CMBS™), Lane Keeping Assist System (LKAS), and Adaptive Cruise Control (ACC) with Low-Speed Follow (LSF) that now incorporates Traffic Jam Assist.

Adaptive Cruise Control with Low-Speed Follow and New Traffic Jam Assist (TJA)
Adaptive Cruise Control (ACC) with Low-Speed Follow allows the driver to set a desired speed and following interval behind the vehicle ahead, allowing the use of cruise control in light traffic. This system is combined with a Low-Speed Follow capability, which extends the automatic following capability to stop and go traffic situations (down to 0 mph).

The 2018 RLX is the first Acura model to offer Traffic Jam Assist (TJA). With an expanded speed range Lane Keeping Assist system, TJA uses millimeter wave radar and a camera to identify lane markings and detect a vehicle that is preceding the RLX in its lane.

When activated with a switch located on the right side of the steering wheel, at speeds between 0 and 45 mph, TJA will automatically scan for a preceding vehicle and lane markings. The system can help the driver maintain lane position with light steering assist while maintaining a set cruising speed, and respond to slowing traffic ahead to bring the RLX to a complete stop if needed. The benefit of Traffic Jam Assist is a reduction in both driver input and stress in heavy traffic on multi-lane roads such as freeways, tollways and expressways.

Collision Mitigation Braking System™ (CMBS™) with Head-Úp Warning with Forward Collision Warning (FCW)
The 2018 Acura RLX's standard Collision Mitigation Braking System™ (CMBS™) is one of the most sophisticated safety technologies available. A millimeter wave radar unit, located behind the front grille, and monocular camera, located between the rearview mirror and windshield, scans traffic conditions ahead of the vehicle.

When the system determines a collision is possible with a detected vehicle, the integrated Forward Collision Warning FCW system's visual and audible alerts prompt the driver to take corrective actions. The visual alert appears on the Multi-Information Display (MID), as well as on the Head-Úp Warning system RLX Hybrid only). If the situation is not resolved, CMBS can apply different levels of automatic braking action to help reduce vehicle speed and eventual collision forces, and therefore to help reduce the severity of a collision if the driver doesn't take corrective action.

Due to the effectiveness of its monocular camera, CMBS can recognize shapes and differentiate between a vehicle and a pedestrian, warning the driver in each case.

It is important to note that CMBS cannot detect all objects ahead, nor is it intended to replace the driver's assessment of traffic conditions and control of the vehicle. The driver must intervene in certain situations, and must always be attentive when using the system. Although in many cases CMBS will stop the vehicle, it is not intended to apply enough braking force to prevent all collisions. Based on the conditions, the system also may not perform all visual- and audible-alert stages, and may instead automatically engage the brakes if the system deems it necessary. CMBS may be turned off by pressing the CMBS button on the left side of the instrument panel.

Road Departure Mitigation (RDM) with Lane Departure Warning (LDW)
Included in both RLX models for 2018, Road Departure Mitigation (RDM) uses a Monocular Camera (mounted on the upper portion of the windshield) to identify solid or dashed painted lane lines, Botts' dots and cats eye markers. RDM uses both steering force, via EPS, and braking force, via VSA, to help the TLX stay in its lane.

The Monocular Camera recognizes lane features and identifies the lane. If the RDM system detects that the RLX is about to leave the detected lane, it will provide steering assist (primary) and in rare occasions when steering is not sufficient, braking assist, to help the driver stay on the road. Only lane departure is activated if the driver is passing over a dashed line, Botts' dots or cats eye, while deceleration support is disabled. In this case, RLX uses active steering force to return to the lane. RDM is integrated with the Vehicle Stability Assist™ (VSA®) system to provide moderate braking, and with the Electric Power Steering (EPS) system to provide steering input.

Multiple visual and audible warnings alert the driver when the RDM system is taking corrective action. These include a Lane Departure Warning (LDW) on the driver's Multi Information Display (MID) along with an audible warning.

RDM also has a customizable initial warning of either a steering wheel shake/vibration, or an audible alert. This can be customized in the vehicle settings.

Lane Keeping Assist System (LKAS)
Both 2018 RLX models feature Lane Keeping Assist System (LKAS) to provide a premium driving experience by reducing steering correction movements and driving effort on the highway. LKAS uses a camera to read lane markings to assist the driver in driving in the middle of the lane.

Designed for the Ú.S. road structure, the system uses a camera mounted on the upper portion of the windshield to identify Botts' Dots and Cat Eye markers. New for 2018, the Lane Keeping Assist System now operates at speeds between 0 mph and 90 mph, as part of the Traffic Jam Assist System. When LKAS senses that the driver is drifting from the middle of a detected lane, the system generates counteracting steering torque to assist the driver in maintaining lane position, while also displaying a visual warning in the MID within the instrument panel to alert the driver about a potential lane departure.

Blind Spot Information (BSI)
The standard blind spot information (BSI) system uses two radar sensors to continually monitor conditions behind the RLX and alert the driver if another vehicle is detected in close proximity – especially in the blind spot of the driver. The BSI system uses the LED indicators (mounted on each A-pillar escutcheon) and an audible warning to alert the driver.

There are two warning levels: 1) If a vehicle is in the driver's blind spot then the LED indicator on the appropriate side illuminates; and 2) If a vehicle is detected and the RLX turn signal is activated, the LED indicator on the appropriate side blinks and a buzzer sounds three times. To prevent false alarms while maneuvering at low speed, the BSI system is disabled below approximately 20 mph.

Rear Cross Traffic Monitor
The Rear Cross Traffic Monitor works in conjunction with the RLX's blind spot information radar sensors to enhance driver confidence and safety when backing up. The system is especially useful when reversing in congested parking lots with an obstructed view from driver's seat.

The system utilizes a pair of blind-spot radar units located in the rear bumper corners. When Reverse is selected and an approaching vehicle is detected, arrows indicating the approaching vehicles direction are shown on the 8-inch upper display's rear camera image. Simultaneously, an audible warning is emitted if cross-traffic is approaching from either side.

Parking Sensors
To assist in maneuvering in tight spaces, such as entering or exiting a parking space, the 2018 RLX Sport Hybrid features a set of six parking sensors. A sensor is located at each corner of the vehicle with an additional two at the center rear. When a sensor(s) detects an object close to the vehicle, the system provides an audible warning plus a visual alert on the upper central display screen.

Pedestrian Injury Mitigation
The RLX has an impact-absorbing front body design to help absorb energy in the event of a frontal collision with a pedestrian. Research shows that the following features can dramatically improve a pedestrian's chance of survival if struck by a moving vehicle:
•Impact-energy absorbing hood
Space is provided between the underside of the hood and key powertrain components, allowing the hood to bend and deform if contact is made with either an adult or a child pedestrian.
•Energy-absorbing fender mounts and supports
Front fender mounts and brackets are designed to deform easily to help absorb impact energy.

Acura RLX - Accessories

A line of Acura Genuine Accessories was developed simultaneously with the RLX to provide vehicle personalization for the owner. Like all Acura Genuine Accessories, the RLX accessories are covered by a 4-year/50,000-mile limited warranty if installed by the dealer at the time of original vehicle purchase.

Accessories for the 2018 RLX include:

Electronics
•Engine-block heater
•LED fog lights

Exterior
•Deck-lid spoiler
•Spare Tire Kit
•Car cover
•Splashguards
•Body-side molding
•Wheel locks
•Door-edge film
•Rear bumper appliqué
•19-inch SBK alloy wheels
•Door Handle Film

Interior
•All-season floor mats
•High-wall all-season floor mats
•Cargo net
•Trunk tray
•Sunshade
•Logo pattern protector
•Premium floor mat set
•First aid kit
•Illuminated door sill trim
•Cargo organizer

Source - Acura