Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1986-12-18
1988-07-26
Reger, Duane A.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303114, B60T 832
Patent
active
047595914
ABSTRACT:
A hydraulic brake system with a master cylinder actuatable by a brake pedal (44) by the intermediary of a power booster (1) and with valve means interposed between the master cylinder (3) and the wheel brakes (18, 19, 20, 21) connected thereto. Pressure fluid can be removed from the brake circuits (13, 14) and replenished subsequently out of an auxiliary-pressure source (4, 52, 53). An auxiliary piston (38, 64) is located between the force-output member (2) of the power booster (1), on the one hand, and the piston (31, 36) of the master cylinder (3), on the other hand, for the purpose of generating a controlled pressure, at the end of which auxiliary piston close to the master cylinder piston (31, 36) a duct (49) is provided which is closable by a valve ball (41) that cooperates with the portion of the master cylinder piston (31) close to the auxiliary piston (38). Both the auxiliary piston (38) and the pedal-side portion of the master cylinder piston (31, 36) plunge into a piston chamber (50) which communicates via a first pressure-fluid conduit (54, 56) with an auxiliary pressure source (4). The duct (49) contained in the auxiliary piston (38) is by way of a second pressure-fluid conduit (47, 46, 56, 58) in communication with pressure-fluid supply reservoir (5) so that, after pressure build-up has been effected, the pressure fluid prevailing in the piston chamber (50) is permitted to discharge into a pressure-fluid supply reservoir (5).
REFERENCES:
patent: 3910643 (1975-10-01), Kobashi et al.
patent: 3999808 (1976-12-01), Belart
patent: 4657315 (1987-04-01), Belart
Reinartz Hans-Dieter
Steffes Helmut
Alfred Teves GmbH
Graham Matthew C.
Raden James B.
Reger Duane A.
Seitter Robert P.
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