| 摘要 |
<p>PURPOSE:To lessen a shock at the time of gearshifting and make it once in substance, by connecting each clutch for forward, backward and speed steps gradually, after keeping a main clutch in a slip state with selecting operations of each clutch for these forward, backward and speed steps, and connecting a rear main clutch by degrees by a hydraulic controller. CONSTITUTION:Hydraulic pressure out of a pump P is led into a torque converter TC by way of a regulator spool 5, while it is constituted so as to be guided to a main clutch MC by way of a main clutch booster valve 12, and to each step solenoid valves 1b, 2b and 3b of a geared transmission TM by way of a throttle 7, and furthermore to a solenoid valve Fb by way of an inching spool 8. Therefore, when this solenoid valve Fb is set down to a connecting position of a clutch F, the main clutch MC is kept in a slip state and the forward clutch F is gradually connected, and afterward the main clutch MC is also connected by degrees, so that a shock feeling at the time of gearshifting is reducible, making it possible to be once in substance.</p> |
