| 摘要 |
PROBLEM TO BE SOLVED: To communize a discharge valve which discharges the hydraulic pressure of an oil passage communicating to an electromagnetic pump at a start of a vehicle having an idling stop and to make the discharge valve common in use.SOLUTION: During the rotation of an engine, supply pressure supplied to a hydraulic servo C-1 for a C1-clutch is switched to relief pressure from a linear solenoid valve SL1 by a switching valve 5, and during a stop of the engine, the supply pressure is switched to hydraulic pressure from an electromagnetic pump 3. An orifice 13 is interposed at an upstream side of a discharge valve 12 which discharges the hydraulic pressure of an oil passage from the electromagnetic pump 3, and the discharge valve is communized. The discharge valve 12 is made to be common for use in a revere hydraulic servo B-2 or the like. |
