| 摘要 |
<p>PURPOSE:To provide governing structure in which a hydraulic clutch is smoothly engaged despite of the change in condition of an external factor by providing a control means which intermittently operates d solenoid valve causing acceleration to respond to given characteristics based on detection by an acceleration detecting means during engaging operation of a clutch. CONSTITUTION:When some device of a main speed change gear, an auxiliary speed change gear, and forward reverse shifting device is shifted in a state in which a car body runs, a pilot pressure from a shifting operation system is decreased in the middle of shifting operation. Simultaneously with cut off of pressure oil fed from a hydraulic pump 15 by means of a logic valve group 22, a hydraulic clutch 3 is operated. When shifting operation is completed, the logic valve group 22 is brought into an energizing state again, and the hydraulic clutch 3 is engaged. During engaging operation, a signal from a sensor 29 is fed to a control device 27, and a solenoid valve 26 is operated by means of an intermittent signal so that a value of acceleration is caused to respond to given characteristics preset at an acceleration setter 30.</p> |
