Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1984-10-09
1987-05-05
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303119, 60577, 60578, 60553, B60T 844, B60T 1368
Patent
active
046626883
ABSTRACT:
The present invention starts from a vehicle hydraulic brake system comprising a master cylinder (2) actuatable by a hydraulic power booster (1) and containing a working chamber (12, 21), to which latter wheel brakes (36, 37, 38, 39) are connected by way of valves (40, 41) controllable by a slip control electronics. On control action, pressure fluid can be taken from the wheel brakes (36, 37, 38, 39) through the valves (40, 41) and can be replenished out of the presser chamber (5) of the hydraulic power booster (1) by way of the working chamber of the hydraulic power booster by way of the working chamber (12, 21). On communication of the working chamber (12, 21) with the pressure chamber (5) of the hydraulic power booster (1), simultaneously, a resetting sleeve (11) is pressurized in the brake's release direction which is penetrated by a master cylinder piston (10) and which serves to limit the stroke of the brake pedal (6). In particular with a view to simplifying the design of the braking pressure generator (1, 2), it is proposed that an annular housing chamber (15), which is confined by the end face of the resetting sleeve (11) that is remote from the working chamber (12), is normally isolated from an unpressurized supply reservoir (18) and is in communication to said supply reservoir (18) exclusively during brake slip control.
REFERENCES:
patent: 4415210 (1983-11-01), Belart et al.
patent: 4416491 (1983-11-01), Belart et al.
patent: 4440454 (1984-04-01), Belart et al.
Butler Douglas C.
IT&T Industries, Inc.
Michals William J.
Oberley Alvin
Raden James B.
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