| 摘要 |
In a transmission for a vehicle wherein hydraulic clutches each put into a connection state according to an action of an oil pressure are provided between a crankshaft and main shafts of an engine, and a plurality of selectively establishable speed-stage gear trains are provided between a transmission output shaft and the main shafts so that a condition where every one of the gear trains is in a non-established state can be obtained, to prevent a speed change shock from being generated at the time of starting the vehicle from a neutral condition. At the time of shifting from a neutral condition where every one of a plurality of speed-stage gear trains G1 to G5, GR is in a non-established state and the oil pressures in hydraulic clutches are in a lowered state to a starting condition for establishing a starting gear train G1 or GR so as to start the vehicle, the pressure in the hydraulic clutch corresponding to the starting gear train G1 or GR is controlled by a control valve in such a manner that the oil pressure in the hydraulic clutch is maintained in the lowered state even after a shifting operation and, thereafter, is increased in response to completion of establishment of the starting gear train G1 or GR. |
