Robert Boschgmbh

Thomas Meier

Alfred Strehle

Eberhard Sonntag

Rudiger Poggenburg

Norbert Dressler

Bernd Gutoehrlein

Braking system for a motor vehicle

Method and apparatus for controlling the brake system of a vehicle

Wheel speeds on each side of the vehicle are added, and the sums are subtracted to form a difference VXU which is time filtered to produce a filtered difference VXG. As long as VXU does not exceed VXG by more than a speed dependent threshold, a signal indicating straight line travel is produced. This signal can be cancelled when VXG exceeds a vehicle dependent threshold and is also blocked when the vehicle speed falls below a minimum, when the ABS is operating, or when the vehicle is decelerating. The signal indicating straight line travel accounts for tire tolerance and can be used to control vehicle dynamics, for example by preventing an increase in brake pressure or engine braking when the vehicle is travelling in a curve.

Method of producing a straight-on travel signal

An ABS for an all-wheel-drive vehicle in which the wheel slip is included in the instability criterion. The gradient of the reference speed required for determining the wheel slip is limited, when the vehicle is accelerating, to the measured acceleration of the vehicle if the acceleration of the wheels is greater than the acceleration of the vehicle.

Anti-lock brake control system

Brake system

Growing community of inventors

Le Vaudove, France

Thomas Meier