| 摘要 |
A hydraulic brake pressure control system comprising a spool valve which reacts proportionally to a pedal depressing force for controlling hydraulic communication between inlet, outlet and drain ports, the spool valve having, at both sides thereof, hydraulic pressure receiving areas which are exposed to hydraulic pressure, and an actuator for controlling the hydraulic pressure acting on the receiving areas in accordance with a signal indicative of an optimum brake control operation.
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