Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1990-03-30
1991-09-03
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303114, 303116, B60T 858, B60T 844
Patent
active
050447025
ABSTRACT:
A brake system providing traction slip of the controlled driven wheels. The rotating pattern of the driven wheels is permanently monitored by sensors (S1, S3 and S2, S4, respectively). In the event that one of the driven wheels tends to spin, the system switches to the traction slip mode so that a drive M of two pumps (21, 26) is actuated and an ASR valve (80) reswitched causing the air pressure to be applied to the booster chamber of the servo system (3) and the master cylinder to be actuated independently of the pedal actuation. During the start-up phase of the pumps (21, 26) pressure fluid is passed from the master brake cylinder to the driven wheels enabling a fast and effective pressure build-up in the wheel brakes of the driven wheels to effectively prevent the wheels from spinning. The master cylinder (2) therefore provides the function of an accumulator.
REFERENCES:
patent: 3617099 (1971-11-01), Sugiyama
patent: 4790608 (1988-12-01), Burgdorf et al.
patent: 4828337 (1989-05-01), Wagner et al.
patent: 4869559 (1989-09-01), Klein
patent: 4932727 (1990-06-01), Wagner et al.
patent: 4966420 (1990-10-01), Schiel et al.
Beck Erhard
Dinkel Dieter
Alfred Teves GmbH
Lewis J. Gordon
Muratori Alfred
Oberleitner Robert J.
Seitter Robert P.
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