Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1988-10-07
1989-10-10
Reger, Duane A.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
180197, 303114, B60T 862
Patent
active
048727326
ABSTRACT:
The proposed vehicle brake system has wheel brakes, a master brake cylinder, an auxiliary pressure source, and a brake booster supplied from it for actuating the master brake cylinder, as well as an apparatus capable of preventing the danger of skidding and limiting drive slip at driven wheels. To prevent the danger of skidding, valves disposed between the master brake cylinder and the wheel brakes are provided by means of which the wheel brakes can be disconnected from the master brake cylinder and connected to a pressure fluid supply container to reduce the brake pressure. For replacing the quantities of pressure fluid diverted into this pressure fluid supply container, the valves are connected to the brake booster. To enable limiting drive slip at driven wheels at little expense for additional valves, valves embodied as 2/2-way valves are connected between the wheel brakes of driven wheels and their associated valves also communicate with the auxiliary pressure source. In drive slip limitation, the valves are directed into a blocking position, so that brake pressure required for drive slip limitation cannot escape into the master brake cylinder.
REFERENCES:
patent: 4575160 (1986-03-01), Leiber
patent: 4589706 (1986-05-01), Leiber
patent: 4662687 (1987-05-01), Leiber
patent: 4736993 (1988-04-01), Reinartz et al.
Greigg Edwin E.
Reger Duane A.
Robert & Bosch GmbH
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