| 摘要 |
PURPOSE:To prevent overrun of a motor and deceleration shock at the time of gear shifting by shifting a transmission to a neutral condition at the time of shifting from a high speed stage to a low speed stage, and also increasing the actual input rotation speed of the transmission, and performing shifting when the difference between them became less than a specified value. CONSTITUTION:An operational means 16 operates input rotation speed from the output rotation speed detected by an output rotation speed detecting means 18 and a reduction rate according to the shifting stage commanded by a variable speed operating member 14, and an outputting means 19 outputs a signal in accordance with the difference between the input rotation speed detected by an input rotation speed detecting means 17 and the operated input rotation speed. When the operated input rotation speed is more rapid, rotation speed control means 8, 9 increase the actual input rotation speed of a transmission 5 in accordance with the difference between both input rotation speeds. When shifting operation of the shifting stage is performed to the direction wherein the reduction ratio becomes large, a shift control means 12 shifts the transmission 5 to a neutral condition, and, at the same time, operates the output means 19 and the rotation speed control means 8, 9, and performs shifting of the shifting stage when the difference in input rotation speeds became less than a specified value. |
