Brake system with hydraulic brake booster and corresponding method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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May 6, 2003
Grant Date -
N/A
app pub date -
Oct 22, 2001
filing date -
Jan 22, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A brake system with hydraulic brake boosting has a hydraulic actuating unit which comprises a hydraulic reservoir, a brake pedal, a brake-pressure generator and a pedal-travel simulator, a hydraulic unit comprising a pressure generator, a hydraulic wheel-brake device and a control unit for coordinating the functions of the actuating unit, of the hydraulic unit and of the wheel-brake device. The pedal-travel simulator possesses a variable displacement volume which is connected to the hydraulic reservoir via a hydraulic line. In order to design electrohydraulic brakes by simple means so as to be more fail-safe, a return line is provided between the wheel-brake device and the displacement volume of the pedal-travel simulator. Moreover, there is arranged in the hydraulic line, between the hydraulic reservoir and the displacement volume of the pedal-travel simulator, a return-flow valve which in the event of a fault, with the brake system defective, can be shifted into a shut-off position blocking the hydraulic line.
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