Skid-controlled brake system

Details Skid-controlled brake system Skid-controlled brake system

1987-02-25

1988-10-11

Reger, Duane A.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303116, 303119, B60T 844

Patent

active

047766450

ABSTRACT:
A skid-controlled brake system comprising a pedal-operated vacuum booster (3) including a master cylinder (2) connected by way of brake lines (63, 64) to the wheel brakes (31, 32, 33, 34). The system further comprising a hydraulic auxiliary pressure supply system connected, by way of supply lines (24) to the brake circuits and including a hydraulic pump (26). A pressure compensation and pressure fluid reservoir (20) is provided. Wheel sensors (S.sub.1, S.sub.2, S.sub.3, S.sub.4) and electronic switching circuits (44) are provided for detecting the wheel rotating pattern and for generating electric brake pressure control signals to control, for skid control, an electromagnetically operable 3-way/2-position valve inserted into each brake line (63, 64). Control valves (10, 11) are disposed in the piston (6, 7) of the master cylinder (2) opening the pressure fluid passage from the pressure chambers (8, 9) of the master cylinder (2) to the annular chambers (14, 15) formed by circular grooves (54, 55) in the pistons (6, 7) and by the piston bore (65). The control valves (10, 11) are in communication, by way of compensating ports (16, 17) and hydraulic lines (18, 19), with the pressure fluid reservoir (20).

REFERENCES:
patent: 4523792 (1985-06-01), Belart et al.
patent: 4555144 (1985-11-01), Belart et al.
patent: 4681375 (1987-07-01), Belart

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