| 摘要 |
PURPOSE:To prevent reversing for sure by detecting the reversing of an engine by a condenser-charging lock device and maintaining lock thereafter without reference to the lowering of the revolution of the engine for removing the unstable state just before the stoppage of reversing. CONSTITUTION:When an engine is reversed and a voltage Vc of a condenser 312 is increased to reach to the first reference value, a voltage-detecting circuit 4 issues a reverse-detecting signal of a high level, by which a transistor 602 is on through a resistance 601 and a transistor 605 is on through a resistance for charging the condenser 312 rapidly from an electric source Us. Even if the number of reverse revolutions of the engine is lowered, this voltage Vc will not be lowered, and the output of the voltage-detecting circuit 4 is maintained at ''H''. In this construction, since operation is continued even after the engine is completely stopped, the engine is free from restarting of the reversing. |
