| 摘要 |
PURPOSE:To prevent shift's overs and shorts from occurring as well as to secure a stable shift position, by setting the desired value with the learning value value made by the detecting value of a stroke sensor in a clutch's on-state in case of setting the shift position of a shift actuator. CONSTITUTION:In both oil chambers 1f and 1g of a stepped cylinder 1a, for example, when hydraulic pressure acts on the oil chamber 1f, on one side, alone, a first piston 1b goes down with a second piston 1c, thus a piston rod 1d of a shift actuator 1 is shifted to the gear step R, two and 4 speed gear sides. In this case, a signal out of a sensor 14 detecting a stroke position of the piston rod 1d and a signal or the like out of a sensor 16 detecting a clutch stroke are inputted into an electronic controller 15. And, on the basis of these signals, both solenoid valves 2 and 3interconnecting both these oil chambers 1f and 1g to a hydraulic source 4 and a tank 5 are selectively operated, and the piston rod 1d is moved to either position. |
