| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a clutch from being moved in the OFF direction by air leak when a car is parked with a gear engaged to improve reliability in parking with a gear engaged. SOLUTION: In a device for disconnecting a mechanical clutch when fluid pressure is supplied to a clutch actuator 55 and for connecting with the releasing of the supply, usual solenoid valves 80, 81 used usually in a usual circuit and changing fluid pressure in a supplying position, an exhausting position and a close position and emergency solenoid valves 84, 85 which are used in an emergency circuit and change fluid pressure in the exhausting position and the close position are provided. The usual solenoid valves 80, 81 are changed at the supplying position and the exhausting position in response to a driving state and is held at the close position when an engine key switch 103 is turned off and the emergency solenoid valves 84, 85 are changed at the close position when the engine key switch 103 is turned on and at the exhausting position when turned off. When the engine is stopped, the emergency solenoid valves 84, 85 are at the exhausting position to exhaust air and to connect and hold a clutch even if there is air leakage in the usual solenoid valves 80, 81.</p> |
