Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1994-05-11
1995-01-03
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
3031154, 3031161, B60T 832, B60T 848
Patent
active
053780558
ABSTRACT:
A hydraulic brake system with anti-lock control, in particular for automotive vehicles, comprising a braking pressure generator (18), at least one wheel brake (5), an auxiliary-pressure pump (1), a low-pressure accumulator (22), and a shut-off valve and outlet valve (12, 7) for controlling the braking pressure. The shut-off valve is controlled to permit or prevent pressure fluid flow between the braking pressure generator and the wheel brake by a stepped piston positioned in a stepped bore in a housing. Initially, the stepped-piston maintains the shut-off valve open to permit pressure fluid flow. During slip control operation when pressure fluid from the low-pressure accumulator is delivered to the stepped-bore by the auxiliary-pressure pump, the stepped-piston closes the shut-off valve to prevent pressure fluid flow.
REFERENCES:
patent: 4618189 (1986-10-01), Nakanishi et al.
patent: 4708407 (1987-11-01), Maehara
patent: 4964681 (1990-10-01), Burgdorf et al.
Maas Joachim
Michaelis Klaus
Alfred Teves GmbH
Lewis J. Gordon
Oberleitner Robert J.
Poon Peter M.
Seitter Robert P.
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