| 摘要 |
PURPOSE:To make a clutch operation characteristic smooth by providing an acceleration detecting means which is connected to an electromagnetic proportional pressure reducing valve and regulating the initial pressure rising speed when operating a clutch to be on, in accordance with the acceleration of a traveling vehicle body. CONSTITUTION:An electromagnetic proportional pressure reducing valve 17 is provided in between the clutch operation control valve T3 and the hydraulic clutch C, of a pressure oil feeding system. The electromagnetic proportional pressure reduction valve 17 is operated by a control circuit 23 into which a signal from an acceleration sensor 24 is inputted. In this case, the control circuit 23 is operated in accordance with the values of both increasing and decreasing acceleration of the acceleration sensor 24. That is, the electromagnetic proportional pressure reducing valve 17 is throttled in a pressure reducing direction at the time of larger acceleration while being throttled in a pressure increasing direction at the time of smaller acceleration. Thereby, when operating a clutch, the time to become an engaged condition can be reduced, maintaining a smooth clutch operation characteristic.
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