JPS6412991A - Backing controller for car - Google Patents

Abstract

PURPOSE: To prevent reverse motion when a forward and reverse motion changeover clutch is suddenly switched to the reverse motion position by stopping an engine by means of a stopping means when the switching motion of the forward and reverse motion changeover clutch to the reverse motion position is detected with clutch engaged and by making the stopping means non-operable in a reverse motion state. CONSTITUTION: When a forward and reverse changeover clutch is positioned in the forward position, and a reverse switch 82 is turned to an F side, a transistor 106 is turned off, and an ignition circuit 86 is operated, making an engine operable. With the switch 82 positioned at the reverse position, when a speed changing clutch is turned off and a clutch switch 80 is turned off, an SCR 108 is turned on and the transistor 106 is turned off, making ignition possible. In the next step, with the switch 80 turned on, when the switch 82 positioned at the F position is switched to the R position, the transistor 106 is turned on, and the ignition circuit 86 becomes non-operable, resulting in the stop of the engine. With the switch 82 positioned at the R position, to turn the switch 80, which is turned off, on, the SCR 108 is kept turned on, that is, the ignition circuit 86 keeps operable. Therefore, the reverse motion caused by sudden switching can be prevented.