Fluid-pressure and analogous brake systems – Pipeless valves
Patent
1983-12-12
1985-06-18
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Pipeless valves
188345, 303100, 303114, 303116, 303119, B60T 802, B60T 1722
Patent
active
045237921
ABSTRACT:
A dual-circuit hydraulic brake system with slip control, in particular for automotive vehicles, in which there are provided several sensors sensing the rotational behavior of the wheels and several solenoid valves (39, 37, 40, 38 41, 42, 30, 31) which are controllable by slip monitoring electronics (32). The wheel brakes (33, 34, 35, 36) connected to the brake circuits may be pressurized by a tandem master cylinder (3), on the one hand, and by an auxiliary pressure source, on the other hand. The auxiliary pressure source consists of an electric-motor-driven pressure medium pump (20) and of an accumulator (21). Each working chamber of the tandem master cylinder (3) hydraulically communicates with a brake valve (16) which may generate a dynamic pressure which, upon the actuation of the brake, will be supplied to wheel brakes (33, 34, 35, 36) by a switching-over action of inlet valves (30, 31). The inlet valves (30, 31) are additionally controllable by a differential pressure alarm switch (44) connected at the working chambers of the tandem master cylinder (3). This prevents dynamic pressure medium from entering a defective brake circuit, the intact brake circuit remaining operative in the usual manner.
REFERENCES:
patent: 3827761 (1974-08-01), Inada
patent: 3948568 (1976-04-01), Leiber
patent: 4340257 (1982-07-01), Belart
patent: 4354714 (1982-10-01), Belart
patent: 4362339 (1982-12-01), Belart
patent: 4415210 (1983-11-01), Belart et al.
Belart Juan
Burgdorf Jochen
Butler Douglas C.
IT&T Industries, Inc.
Michals William J.
Raden James B.
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