Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1985-05-08
1987-08-18
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
605471, 188181R, 188358, 303 52, 303 68, 303119, B60T 844
Patent
active
046872590
ABSTRACT:
A hydraulic brake system with slip control for automotive vehicles comprising a master cylinder (2) pressurizable by a hydraulic power booster (1), in which system valve(s) (31,27,32,28,33,23) are inserted between the master cylinder (2) and the wheel brakes (29,30,24,25) connected to the master cylinder (2) which allow pressure fluid removal from the wheel brakes (29,30,24,25) that can be replenished out of the pressure chamber (19) of the hydraulic power booster (1) by way of a change-over valve (36). A stroke limitation of the brake pedal (8) is effected during slip control. The end surface of the master cylinder piston (5) close to the working chamber (16) being larger than the is effective surface of the booster piston (4), and wherein a stepped piston is employed as master cylinder piston (5) with an annular surface (18) thereof being adapted to be acted upon in the actuating direction by the pressure prevailing in the working chamber (16). A non-return valve (37, 38) is connected to the change-over valve (36) normally assuming its closed position through which the wheel brakes (29,30,24,25) can reacted upon directly by the pressure prevailing in the pressure chamber (10) of the hydraulic power booster (1).
REFERENCES:
patent: 4340257 (1982-07-01), Belart
patent: 4477125 (1984-10-01), Belart et al.
Reinartz Hans D.
Steffes Helmut
Alfred Toves GmbH
Butler Douglas C.
Michals William J.
Raden James B.
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