Daimler Chrysler Ag

Mercedes-benz Aktiengesellschaft

Walter Kupfer

Harry Troester

Wolfgang Clar

Gustavo Brausch

In a method for carrying out an automatic braking operation for motor vehicle with an anti-lock system, the pedal position and the brake pressure for the wheels not subjected to ABS control are correlated during the automatic braking operation such that the brake pressure is no greater than would correspond to the position of the brake-actuating device in the case of a normal braking operation. Rapid braking of these wheels is achieved while the pedal position continues to represent a reliable measure of the brake pressure.

Motor vehicle braking method which prevents brake pedal hardening during

In a road vehicle electrohydraulic brake system, each wheel brake is assigned a brake-pressure regulating element which can be controlled by an electric motor. At least one electronic retardation desired-value signal transmitter is actuated by the driver. An electronic control unit produces the required actuating signals for the brake-pressure regulating elements from a comparison of the desired-value input signals with actual-value signals characteristic of the vehicle retardation. The brake-pressure regulating elements each comprises a piston pump. The filling and delivery strokes of these elements are performed in a fixed phase relationship with a pump driving element. The output of the pump per pump cycle is regulated opposite the pressure and, in all cases, is small relative to the output, Q.sub.max, required for coupling the maximum value of the brake pressure P.sub.Bmax into the connected wheel brake. With the vehicle stationary and the desired-value transmitter actuated, an electrically drivable valve arrangement shuts off the brakes from the brake-pressure regulating elements and, given a reduction in the desired-value input, allows brake fluid to flow out of the brakes into individually assigned reservoir chambers.

Growing community of inventors

Weinstadt, Germany

Walter Kupfer