| 摘要 |
PROBLEM TO BE SOLVED: To properly hold a shift position as a need for a special holding mechanism is eliminated and to prevent the occurrence of disadvantage wherein a shift position is unexpectedly fluctuated. SOLUTION: In the running shift structure of a working vehicle constituted such that shift operation of a continuously variable transmission 3 for running is assisted by an electric motor 23, when shift operation is not effected, a hold current is fed to the electric motor 23 to block movement of the continuously variable transmission 3 by a return energizing force to the low speed side. When it is discriminated that the continuously variable transmission 3 is operated to the high speed side, the feed of a holding current is stopped. Further, when, after the feed of a holding current is stopped, it is discriminated that the continuously variable transmission 3 is operated to the deceleration side, an amount of feeding holding current is returned to an original value. |
