Patent ID: 8714325
Filing Date: 2014-05-06
Classification: F16H

Abstract:
1. A hydraulic pressure control device that controls supply of a hydraulic pressure to a torque converter including a lock-up clutch that is engageable using a hydraulic pressure from a mechanical pump driven by power from a motor, comprising: a first pressure regulation valve that regulates a hydraulic pressure in a first oil passage connected to the mechanical pump while discharging oil in the first oil passage to a discharge oil passage; a bypass oil passage branched from the first oil passage to bypass the first pressure regulation valve; a first switching valve that is selectively switchable between a first state in which the bypass oil passage and a second oil passage are connected to each other and a second state in which the discharge oil passage and the second oil passage are connected to each other; and a second pressure regulation valve that regulates a hydraulic pressure in the second oil passage, wherein the first switching valve is configured to be switched into the first state to engage the lock-up clutch, and to be switched into the second state to disengage the lock-up clutch.