| 摘要 |
A hydraulic pressure control apparatus for a hydraulic power transmission, the hydraulic power transmission including a pump impeller configured to rotate, a turbine runner configured to rotate in response to fluid transmitted from the pump impeller, a lock-up clutch adapted to directly connect the turbine runner to a power source and an impeller clutch adapted to disconnect the pump impeller from the power source, wherein the hydraulic pressure control apparatus includes a switching valve provided at a fluid passage connecting the impeller clutch and a hydraulic pressure source and selectively connecting the impeller clutch to one of the hydraulic pressure source and a first control valve controlling a hydraulic pressure applied to the lock-up clutch.
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