| 摘要 |
PURPOSE: To provide a hydraulic control device having simple structure and high reliability, and capable of controlling various kinds of liquid pressure. CONSTITUTION: This hydraulic control device is provided with an operation- actuation piston 41 directly driven by operating a mechanical member of a brake, a clutch or the like, an action piston 43 for interlocking with the operation-action piston 41 and directly acting on the liquid pressure of a part to be operated, and a liquid pressure control means for setting the action piston 43 into an interlocking condition with the operation-actuation piston 41 or releasing the interlocking condition to actuate the action piston 43 independently.
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