| 摘要 |
PURPOSE:To prevent the occurrence of percussion sound, in the case where the up-shift speed change between speed change stages is carried out, if the throttle is fully closed, by connecting the clutch arranged in parallel with a one-way clutch. CONSTITUTION:An up-shift judging means which judges the starting of up-shift speed change, a throttle full-close detecting means which detects the full-close condition of throttle valve, and a solenoid driving means which operates a solenoid 32 of a prescribed time in the direction in which the second clutch 24 is connected when both the above means have sent respective signals are provided. Thus, the same condition as a one-way clutch has been connected can be obtained, and the one-way clutch is never brought into a connected condition from a free condition even if the working direction of torque is reversed in the way of speed change, therefore the occurrence of percussion sound can be prevented. |
