Brake control system for automotive vehicles
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United States of America Patent
Stats
-
Dec 28, 1993
Grant Date -
N/A
app pub date -
Apr 17, 1992
filing date -
Apr 23, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A brake control system for automotive vehicles, comprises a master cylinder, a wheel cylinder, an external hydraulic pressure source for generating an external hydraulic pressure, an electronically controlled hydraulic pressure control valve connected to the external hydraulic pressure source, for converting the external hydraulic pressure to a control pressure, a hydraulic pressure multiplier unit connected to the hydraulic pressure control valve for generating a wheel-cylinder pressure higher than the master-cylinder pressure by multiplying the control pressure, and a spool biasing force restricting mechanism for restricting the magnitude of a spool biasing force created by the master-cylinder pressure to a designated upper limit only when the master-cylinder pressure exceeds a predetermined pressure level sufficient to provide a maximum wheel-cylinder pressure.
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