| 摘要 |
<p>PROBLEM TO BE SOLVED: To gently raise the pressure in connection instruction of a clutch to an intermediate hydraulic pressure without extending the time up to the connection by providing an accumulator having a clutch oil hydraulic regulating valve provided on the outlet side of a clutch fitting and separating valve, an intermediate all pressure setting mechanism and a pressure accumulating chamber, and a drain opening and closing valve. SOLUTION: Since a clutch fitting and separating valve 2 is arranged in the upper stream of a clutch oil pressure regulating valve 8, the pressure loss of a clutch hydraulic oil supplying line is minimized. The initial set oil pressure of the clutch oil pressure regulating valve 8 can be reduced, and the pressure can be raised from a low pressure (the oil pressure corresponding to clutch piston returning force). Since a means for changing the position of the drain hole of the pressure accumulating chamber 17 of an accumulator 14 is provided so that the capacity of the pressure accumulating chamber 17 can be changed, the intermediate oil pressure can be optionally set within a prescribed regulating range, and the hydraulic oil pressure until it reaches the intermediate oil pressure from the low pressure can be gently and smoothly raised.</p> |
