Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1988-07-18
1989-10-31
Kashnikow, Andres
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303116, 303119, B60T 842, B60T 840, B60T 1368
Patent
active
048772968
ABSTRACT:
An antilocking braking system which operates by controlling the pressure reduction and pressure build-up phases at vehicle wheel brakes by changing the volume of a primary chamber of a pressure modulator, to which the wheel brakes are connected via a brake pressure 2/2-way solenoid controlled valve and an inlet valve. The primary chamber of the pressure modulator is connected to a pressure output of a brake booster. The pressure modulator is designed as a hydraulically driven pump whose feed volume per stroke corresponds to approximately 25% to 50% of the maximum brake fluid quantity which can be expelled into the connected brake circuit, and if, when the inlet valve is closed, one stroke of the pump is not sufficient to achieve a required pressure reduction at the connected wheel brakes, then the pump is switched to a return feed mode in that the brake pressure control valves are driven to their blocking positions and the inlet valve is driven to its open position.
REFERENCES:
patent: 3480335 (1969-11-01), Ihada
patent: 3810682 (1974-05-01), Demers et al.
patent: 3877759 (1975-04-01), Sekiguchi et al.
patent: 3922021 (1975-11-01), Every
patent: 4358163 (1982-11-01), Young
patent: 4436348 (1984-03-01), Farr
patent: 4767163 (1988-08-01), Cotigholi
patent: 4775196 (1988-10-01), Braschel et al.
Leiber Heinz
Resch Reinhard
Daimler-Benz Aktiengesellschaft
Kashnikow Andres
Newholm Timothy
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