| 摘要 |
PURPOSE:To efficiently control a shift lever, by providing a logical circuit and an alarm device in an automatic speed change gear of a car, having a three-speed changeover range, and raising an alarm in case when the shift lever is set to an inadequate position against speed of a car. CONSTITUTION:Set voltage is provided in advance on a comparator 4 and a comparator 5 by voltage V1 and voltage V2, respectively. For instance, when a car is in a medium speed state and voltage V is V1<V<V2, since an output of the comparator 4 is ''1'' and an output of the comparator 5 is ''0'', an alarm device 14 is not operated. When a car is in a low speed state and a shift lever is in a driving range, an output of the comparator 4 becomes ''0'' by V<V1, the alarm device is operated, and it is informed that the position selected by the shift level is inadequate. Also, when a car is in a high speed state and the shift lever is in a start range, the voltage becomes V>V2, an output of the comparator 5 becomes ''1'', the alarm device 14 is operated, and it is known that the position of the shift lever is inadequate. |
