Braking pressure generator for a vacuum operated brake system wi

Details Braking pressure generator for a vacuum operated brake system wi Braking pressure generator for a vacuum operated brake system wi

1990-05-04

1991-11-26

Oberleitner, Robert J.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303 87, B60T 0844

Patent

active

050677799

ABSTRACT:
A pedal-actuated braking pressure generator for a brake system with anti-lock control comprising a vacuum-operated servo unit (1), which serves both for boosting the braking force and for generating an auxiliary energy opposed to the pedal force. The system further comprises a master brake cylinder (2) and a piston arrangement (3) connected upstream of the servo unit (1). The piston arrangement comprises a pedal-side piston (15), a reversing valve (18), a pressure transmission chamber (17) and a push-rod piston (19). By a multi-directional valve (5) it is possible to arrest the pedal-side piston (15) during anti-lock control. By means of the reversing valve (18), a pressure medium path is established from the pressure transmission chamber (17) to the pressure compensation reservoir (6), thereby the push-rod piston (19) is relieved in the direction of release of the brake.

REFERENCES:
patent: 4571943 (1986-02-01), Gaiser
patent: 4776645 (1988-10-01), Seibert et al.
patent: 4787685 (1988-11-01), Klein

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