| 摘要 |
<p>PURPOSE:To improve a driving feeling, by filling a desired clutch with hydraulic operating fluid of high pressure so as to connect the clutch by a control signal from a control unit. CONSTITUTION:Forward and reverse clutch selector valves 42A, 42B are provided between an oil pressure control valve 2 and forward clutches 26A, 26B, while speed shift clutch selector valves 45A-45C are provided between the oil pressure control valve 2 and speed shift clutches 22A-22C. Then a discharge selective solenoid valve 51 is provided between a back pressure chamber 15 of the oil pressure control valve 2 and a drain tank 32, and the forward and reverse clutch selector valves 42A, 42B, the speed shift clutch selector valves 45A-45C and the discharge selective solenoid valve 51 are connected to a control unit 53. In this way, a decrease of car speed can be avoided at speed change operation, improving a driving feeling, without causing an increase of required time for connection of the clutches because the clutch can be connected by a control signal from the control unit 53.</p> |
