Patent ID: 9022191
Filing Date: 2015-05-05
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 engaged in accordance with a difference in oil pressure between an engagement oil chamber and a disengagement oil chamber, comprising: a mechanical pump driven by power supplied by a motor to generate a hydraulic pressure; a first pressure regulation valve configured to regulate a hydraulic pressure in a first oil passage coupled to the mechanical pump and to regulate discharge of oil: a second pressure regulation valve configured to (i) receive the hydraulic pressure in the first oil passage and (ii) regulate the received hydraulic pressure to be an engagement pressure for use for engagement of the lock-up clutch in accordance with a first signal pressure to output the engagement pressure to a second oil passage that supplies the oil to the engagement oil chamber; and a third pressure regulation valve configured to (i) receive the hydraulic pressure in the first oil passage or the engagement pressure output to the second oil passage and (ii) regulate the received pressure in accordance with the first signal pressure or a second signal pressure that synchronizes with the first signal pressure to output the resulting pressure to a third oil passage that supplies the oil to the disengagement oil chamber, wherein