Anti-Lock Braking System (ABS)

ABS distinguishes between a full system and a fallback level.

Full ABS System: 

• Full ABS system with intact system: The vehicle controller achieves through active braking-pressure increase at the individual wheels a stabilizing effect beyond the driver's choice.
• The formation of the speed reference is supported, in addition to the information of all the wheel speeds, by the information of the yaw rate and the steering angle.
• Especially in speed ranges < 60 km/h it is possible through individual control that meets requirements (control in relation to the wheel with the greater slip) to achieve shortening of the braking distance for different friction coefficients.

ABS Fallback Level: 

• In the event of a drop-out of the yaw-rate, lateral-acceleration or steering-angle signal or a CAN fault, ABS adopts the so-called fallback level. In this case, the vehicle speed is only determined by way of the wheel-speed sensors.

Differences from the Full System: 

• No supporting active interventions on brake application.
• On account of the lack of information from the additional sensors, there is a convergence with the Select Low control at the rear axle for the purpose of increasing stability.
• No ASC function.
• No MSR function.