Adaptive Cruise Control (ACC)

Adaptive Cruise Control (ACC) works in conjunction with conventional cruise control to maintain a minimum following distance when a lead vehicle is being tracked. The minimum following distance is maintained by automatically decelerating the vehicle using accelerator pedal, engine, and service brakes without driver intervention.

When the lead vehicle is no longer being tracked, the set cruise control speed resumes automatically.

Vehicles equipped with the WABCO OnGuard CMS and Cummins engines come standard with Adaptive Cruise Control (ACC) and Adaptive Cruise Control Recovery enabled.

If ACC is not available, the cancel button must be used to engage standard cruise control.

To obtain cruise control when the adaptive cruise control function has been interrupted, press the pause button 2 times (ON-OFF-ON-OFF) and then press the set button once.

A Set or Resume command on the Set, Resume buttons will now engage the standard cruise control features.

Standby

When no lead vehicle is detected, OnGuard ACC operates similarly to conventional cruise control. The cruise control set speed is shown on the OnGuard display unit. See Fig..

Fig. 1, ACC Standby (blue)

Lead Vehicle Detected

When a lead vehicle is detected in the lane ahead, the display shows that ACC is on and the radar is tracking it. See Fig..

Fig. 2, ACC Lead Vehicle Detected (green)

If the driver uses the accelerator pedal to override the cruise control and approach a vehicle too closely, the ACC will emit an audible alert and the display background will turn yellow. The alert will end when vehicle speed drops below the lead vehicle's speed and the following distance is increased.

Collision Warning

If the lead vehicle is traveling slower than the driver's vehicle, the CMS warns of an impending collision by emitting an urgent audible alert and displaying the collision warning symbol with a red background. See Fig..

Fig. 3, ACC Collision Warning (red)

If the system determines a rear end collision is imminent, it will automatically apply the brakes to reduce the vehicle's speed. The driver may also feel a short brake pulse to warn of an imminent collision. The driver must also initiate braking.

If OnGuardACTIVE detects a stationary object (such as a disabled car), it will sound an urgent audible alert, then a brake pulse, then apply the vehicle's brakes to reduce the vehicle's speed. The driver must also initiate braking.