Technology & Competence

Electronic brake system*

Electronic brake system

One system – triple safety: The EBS electronic brake system includes the ABS anti-lock braking system and ASR traction control system components.

Anti-lock braking system (ABS)

  • The ABS uses sensors to detect the speed of every wheel during braking and adjusts the brake pressure individually at each wheel.
  • Wheels are prevented from blocking.

The vehicle remains directionally stable and steerable even during emergency braking on slippery roads.

Traction control system (ASR)

  • The ASR prevents the drive wheels from spinning when driving off or accelerating.
  • Wheel spinning is detected by the EBS control unit using wheel speed sensors.
  • With the ASR traction control system, the electronic brake system (EBS) can combine ASR engine control and ASR brake control.
  • For ASR engine control, the EBS control unit issues a signal via the FFR vehicle management computer to the EDC engine control unit. When both wheels on the driven axle spin, engine torque and therefore traction are reduced.
  • For ASR brake control, the EBS control unit uses the same wheel speed sensors as for the ABS. However, only the drive wheels are affected. When only one wheel on the driven axle spins, the spinning wheel is braked to reduce the traction, and the differential transfers the remaining drive torque to the other wheel with road grip.

Benefits

  • Braking with the physically maximum possible brake force in a short response time and therefore a reduction in the stopping distance before the pedal is fully pressed down
  • Controlled braking with high driving stability and manoeuvrability even for emergency braking and therefore ultimate braking reliability even on roadways with different friction conditions
  • Conservation of tyres, as tyre wear is evenly distributed over the circumference.
  • Improved traction on slippery surfaces such as ice, snow, gravel or wet cobblestones
  • Improved driving safety: Rear end does not skid at sudden loss of traction
  • Wear-intensive tyre spin is prevented.

* Within the limits of the system.