Acura Automobiles: 2016 Acura RDX Press Kit

Amplitude Reactive Dampers
Amplitude Reactive Dampers are used on the RDX to provide a superior level of ride comfort together with crisp, precise handling. The dampers operate in two distinct performance parameters, including a Ride Zone and a Handling Zone. Each zone has a unique set of compression and rebound damping forces tailored to provide the desired ride and handling attributes. In essence, the amplitude reactive dampers operate like two separate suspension systems combined in one. The new dampers are entirely mechanical in operation with no electronics required.

Ride Zone
For short suspension stroke (between 1-5 mm travel), the dampers provide minimal damping effect to provide an extremely comfortable ride where little suspension travel is needed— such as on smooth road surfaces.

Handling Zone
For longer suspension stroke (over 10 mm travel), a second damping circuit is engaged. Here damping effect is maximized for enhanced steering feel, improved body-roll control and more secure handling— such as during aggressive cornering or on severe road conditions.

With the Amplitude Reactive Dampers, by adding a second spring floating valve (the previous generation RDX only had one conventional valve) above a conventional main piston valve, the RDX is able to maintain the superior driving dynamics of the previous model, and further improve ride qualities to that of a sedan.

For example, while driving on rough surfaces, the application of short-stroke damper movement allows the main piston valve absorb the small vibrations for a comfortable ride. However during hard cornering both the main and second piston valves move that create a much larger damping force for better driving dynamics.

Input Separation Bushings
The RDX utilizes input separation damper mounts to the rear suspension (previous model only had them in front), which supports the amplitude reactive damper to help improve ride stability and driving dynamics. The input separation damper mount helps absorb and more evenly distribute damping forces that are normally passed on to the body. For example, during cornering on rough surfaces, the damper mounts transfer damper force more efficiently to the body, helping to stabilize spring movement.

Steering
The RDX makes use of a Motion-Adaptive Electric Power Steering (EPS) system. Standard on all RDX models, this sophisticated steering system links the vehicle stability assist (VSA) and Electric Power Steering to help detect handling instability experience on slippery roads as well as under braking. The system automatically initiates inputs that prompt the driver to steer in a direction to help mitigate the unstable driving condition.

Coupled with suspension and body structure refinements for 2016, steering effort characteristics have been further tuned for increased effort at higher speeds.

Motion-Adaptive Electric Power Steering (EPS)
Motion-Adaptive EPS is a sophisticated system that incorporates driving stability technology which initiates steering inputs that prompt the driver to steer in the correct direction during cornering and when experiencing slippery road conditions.

Using vehicle speed and steering angle data, Motion-Adaptive EPS works with Vehicle Stability Assist (VSA®) and Electric Power Steering to detect instability in low traction conditions (both during cornering and under braking) and automatically initiates steering inputs aimed at prompting the driver to steer in the correct direction. This new advanced technology supports the driver’s action in operating the vehicle more safely and comfortably.

Noted below are three examples of how Motion-Adaptive Electric Power Steering (EPS) functions in conjunction with VSA.

Mitigates Understeer: Helps correct the steering inputs to mitigate understeer and help the driver trace the intended curve of the road

Mitigates Oversteer: Helps correct the steering inputs to mitigate oversteer and help the driver trace the intended curve of the road

Stabilizes Braking: Helps correct the driver’s steering input to reduce vehicle instability when the driver is braking hard on road surfaces with different friction coefficients (such as pavement that is only partially covered with dirt or snow)

With Electric Power Steering (EPS), a sophisticated electric power-assisted rack-and-pinion steering system takes the place of a conventional hydraulic power steering system on the previous model. EPS responds instantly to steering input and automatically changes the amount of power assist appropriate to the vehicle’s speed.

The Motion-Adaptive EPS system consists of a rack-and-pinion steering gear with an electric motor is located next to pinion axle. To control the level of assist the Powertrain Control Module receives signals from a speed sensor and, coupled with a steering sensor for torque and rotation, then calculates the optimal amount of assist and sends a signal to the electric motor.

When compared to the operation of a conventional hydraulic pump power steering system, the Motion-Adaptive EPS increases efficiency because it does not draw a continuous amount of power directly from the engine. Other advantages of electric power-assisted steering include its simplicity, its lower power consumption (which helps improve fuel efficiency), and its compactness (and resulting lower overall weight).

The steering ratio on all RDX models is 15.0:1 (2012 RDX was 15.1:1), resulting in 2.7 turns lock-to-lock (2012 RDX was 2.8 turns) and a curb-to-curb turning diameter of 39.0 feet (2012 RDX was 39.2 feet).

Wheels Tires
The 2016 RDX features as standard bold new split 5-spoke 18×7.5-inch aluminum wheels with specially developed Michelin Primacy MXM4 P235/60R18 all-season tires designed with particular focus on reduced road noise and lower rolling resistance (improved fuel efficiency). Much time was spent tuning the tires so that noise and harshness was reduced— but without negatively affecting overall handling performance. 2016 RDX models with the Advance Package get a grade-exclusive machined alloy wheel with painted grey inserts, also 18×7.5-inches.

The spare tire is a space- and weight-saving T165/90R17 temporary unit that is located in the floor (under a cover) in the rear cargo area of the RDX.

4-Wheel Disc Brakes
The 2013 RDX received numerous braking improvements that are carried forward to the 2016 model. The front brakes feature more rigid single piston cast-iron calipers that clamp larger diameter (312 mm vs. 296 mm) rotors. The front calipers have a special trim plate that improves looks and prominently displays the Acura name. The 12.3-inch diameter front rotors feature a Geomet coating for improved looks and added rust prevention. In addition, the front rotors are a new design that incorporate more internal cooling vanes (60 vanes versus 42) to improve braking performance.

The rear brakes feature 12.0-inch diameter solid rotors (with Geomet coating) that team with single piston cast-iron calipers. Both the front and rear brake rotors connect to hub bearings that apply new low-friction seals that reduce drag by approximately 20 percent.

The brake pedal stroke ratio has been reduced by 7-percent compared to the previous model, which generates more aggressive braking results.

An Anti-lock Braking System (ABS) with Electronic Brake force Distribution (EBD) is standard on the RDX. ABS helps the driver retain vehicle control during hard braking and EBD automatically proportions brake power to the rear brakes according to the vehicle load and driving conditions, helping to improve stopping performance.

The RDX also has Brake Assist, which uses a microprocessor that recognizes the driver’s intention to quickly apply the brakes in a panic stop situation. In this case, Brake Assist immediately supplements the braking force, enabling the best braking performance in the moment when it’s most needed. Brake Assist only supplements the driver’s intentions, and its function terminates immediately when the driver releases the brake pedal.

In addition to ABS and EBD, new electronic technologies include with Hill Start Assist.

Hill Start Assist
The RDX employs hill start assist (HSA), which helps prevent the RDX from rolling backwards when the driver switches from the brake to the accelerator while the vehicle is stopped on a hill. When the road incline exceeds a 5-percent incline and the vehicle is fully stopped in any forward or Reverse gear (with engine torque holding the vehicle), HSA self-activates. The hydraulic brake modulator is controlled by a longitudinal g-force sensor along with a wheel speed sensor and steering angle sensor.

When hill start assist is active, the brakes momentarily hold as the driver’s foot lifts off the brake. The brakes are automatically released when the driver presses the throttle, sufficient drive torque is applied, and the vehicle begins to move forward.

Vehicle Stability Assist With Traction Control
Vehicle Stability Assist™ (VSA®) is included as standard equipment on the 2016 RDX. By continually monitoring the vehicle’s operating parameters (such as vehicle speed, throttle position, steering angle, individual wheel speeds, lateral G-force and yaw rate), VSA® detects if the vehicle is about to experience oversteer or understeer.

To help correct either of these situations, 4-channel VSA® automatically reduces the engine’s power output as needed, and applies one or more brakes individually to help stabilize the chassis. The VSA® response is so quick that the instability may be corrected even before the driver knows that it is occurring. Traction Control is integrated into the VSA® to help the RDX accelerate smoothly on slippery surfaces. If required, Traction Control can be disabled.

Tire Pressure Monitoring System
The Acura RDX has an onboard Tire Pressure Monitoring System (TPMS) that warns the driver if the air pressure decreases significantly in any tire. The system helps reduce the chance of damaging a tire or losing control of the vehicle due to low air pressure. This is important because a slow leak might not be easily detectable but could over time cause significant air loss resulting in loss of grip or potentially a blowout.

TPMS uses a sensor mounted in each wheel that continually monitors tire pressure and sends a coded signal to the TPMS electronic control unit (ECU). The process begins with a signal initiator located on the chassis just inboard of each tire. The initiator sends a unique signal for each TPMS sensor. Then the TPMS sensor sends tire pressure data to the TPMS ECU, which compares the values for each tire’s pressure against an acceptable range of pressures.

The Multi-Information Display (MID) can simultaneously display the air pressure in all four tires, making it simple to locate a low-pressure tire.

1,500-Pound Tow Rating
For added utility, the RDX has a 1,500-pound tow rating when equipped with the available towing package. The tow rating makes the RDX capable of pulling items such as a small camping trailer, a motorcycle trailer or a personal watercraft.

Designed with the Environment in Mind
Like all products from Honda of America Manufacturing’s facility in Marysville, Ohio, the RDX follows strict guidelines for environmental care— both in the manufacturing process and in the actual vehicle components. The 2016 RDX is manufactured with U.S. and globally sourced parts. The following is a partial list of environmental processes used in creating the RDX that reduces its long-term environmental impact.

• More than 90-percent of RDX parts are made of recyclable materials
• The use of non-chromed tanned leather reduces hazardous waste generation during the tanning process
• Elimination of PVC in most interior and exterior parts improves recycling ability
• Wheel balance weights and electro-deposition paints do not contain any lead