| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic control device for a vehicular automatic transmission switching oil quantity supplied from a hydraulic feeder to a hydraulic circuit without requiring a solenoid valve used exclusively for switching, for switching the amount of hydraulic fluid supplied from the hydraulic feeder to the hydraulic circuit. SOLUTION: In the hydraulic control device, a pump driving state switching valve 60 switches the oil quantity supplied from the hydraulic feeder 32 to the hydraulic circuit such that when the valve piece 74f of a clutch pressure switching valve 74 is in an engagement position by output of hydraulic pressure from a lock-up control solenoid valve 82, the valve piece 74f of the clutch pressure switching valve 74 is maintained in the engagement position regardless of the presence of output of hydraulic pressure from a clutch pressure switching solenoid valve 72 by output of hydraulic pressure from the lock-up control solenoid valve 82, and the communication target of a delivery port 32a is switched to a line pressure oil passage 56 or an oil passage 58 by switching the presence of output of hydraulic pressure from the clutch pressure switching solenoid valve 72. COPYRIGHT: (C)2009,JPO&INPIT
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