| 摘要 |
PURPOSE:To eliminate any occurrence of speed-reducing shock or noise by making a clutch gradually cutting into a disrngaged state when a forward-- backward switch lever is selected in the opposite direction for switchback travel, and varying the extent of throttle opening so as to keep engine speed constant for this while. CONSTITUTION:Engine speed during the travel of a vehicle is detected by a sensor 1, and the signal is inputted into a central processing unit 10. When a forward-backward switch lever is selected in this state, the engine speed is stored in a random access memory 12. Simultaneously with this, such a signal as shifting an clutch engaging value as far as a portion for one step to the off-side is outputted to an actuator drive circuit 18 via a digital-to-analog converter 13, thereby driving a clutch controlling actuator 15. At this time, the engine speed is detected, and when it is more than the said engine speed so far stored in memory, a signal is outputted to a throttle actuator 14 from the CPU 10, and the throttle opening is closed as much as one step. When the above processes are repeated and the clutch engaging value comes to a state of being disengaged, the throttle opening is suddenly brought to nothing.
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