| 摘要 |
PURPOSE:To improve the clutch connection even in the high speed revolution of a clutch by making ineffective or reducing the function of an accumulator and compulsorily increasing the working oil pressure when the number of clutch revolution is over a prescribed value. CONSTITUTION:When the car speed is low, and the spool 21 of a selector valve 11 is set at the first position by a spring 24, a groove 23 allows the second passage 26 to communicate to an inlet 12, and the working oil supplied from the first passage 15 is introduced into the oil chamber 3 of a clutch 1, and the pressure is gradually increased by an accumulator 18, and generation of joint shock is prevented. When the number of clutch revolution is high and a governor pressure is high, the spool 21 moves leftward against the spring 24, and the groove 23 allows the third passage 20 to communicate to the inlet 12, and the working oil supplied from the first passage 15 is introduced into the oil chamber 3, making a detour around an orifice 19. Therefore, the working oil is protected from the action of the actuator 16, and the pressure sharply increases, and a check valve 6 is certainly sealed, and the superior clutch connection state is generated.
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