Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1984-10-09
1987-04-21
Caldwell, Sr., John W.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303119, 60574, 60591, B60T 844
Patent
active
046591524
ABSTRACT:
A vehicle hydraulic brake system with slip control, wherein a master cylinder (2) is pressurizable by a hydraulic poser booster (1). Valve means (23, 24, 29, 28, 32, 33, 34, 35) are inserted between the master cylinder (2) and the wheel brakes (25, 26, 30, 31) connected to the master cylinder (2), which valve means serve to remove pressure fluid from the wheel brakes (30, 31, 25, 26). Pressure fluid taken from the wheel brakes is replenished out of the pressure chamber (10) of the hydraulic power booster (1). A stroke limitation of the brake pedal (8) is effected during slip control. To simplify the design of the braking pressure generator (1, 2), the end surface of the master cylinder piston (5) close to the working chamber (16) is larger than the effective surface of the booster piston (4), and that a stepped piston is employed as master cylinder piston (5), an annular surface of said master cylinder piston (5) being adapted to be acted upon by the pressure prevailing in the working chamber (16). Accordingly, depression of the brake pedal through its full travel will be precluded in any operating condition of the brake system.
REFERENCES:
patent: 3032996 (1962-05-01), Foreman
patent: 3877756 (1975-04-01), Inda et al.
patent: 4416491 (1985-11-01), Belart et al.
patent: 4523791 (1985-06-01), Belart et al.
Reinartz Hans-Dieter
Steffes Helmut
Caldwell Sr. John W.
IT&T Industries, Inc.
Michals William J.
Oberley Alvin
Raden James B.
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