Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1989-10-05
1990-10-23
Reger, Duane A.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
303117, B60T 842
Patent
active
049646800
ABSTRACT:
A flow control valve for antilock control includes a housing having inlet, outlet and discharge ports communicating with a master cylinder, a wheel brake and a reservoir circuit, respectively, and a spool mounted in the housing so as to be slidable between two positions. When the spool is in one of the two positions, a large-flow channel is formed between the inlet and outlet ports, whereas in the other position, a restricted-flow channel is formed therebetween. In an intermediate position, both of the channels are closed by edge portions formed on the spool. A throttled bypass channel is formed so as to branch off from the restricted-flow channel so as to be connected to the outlet port. Even if the spool should get stuck in any intermediate position between the above two positions, hydraulic oil can be fed from the inlet port to the outlet port through this throttled channel.
REFERENCES:
patent: 3851930 (1974-12-01), Grosseau
patent: 4715666 (1987-12-01), Farr
Hashida Koichi
Higashimura Hideaki
Kohno Teruhisa
Matsumoto Atsuo
Nokubo Seiji
Reger Duane A.
Sumitomo Electric Industries Ltd.
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