| 摘要 |
PURPOSE:To prevent the overspeed by a simple constitution by a method wherein a delay angle circuit, consisting of a parallel circuit, is operated upon running at the overspeed, in the overspeed revolution preventing system for the internal- combustion engine. CONSTITUTION:Upon the overspeed revolution, first SCR13, ignited once by the voltage of a capacitor 32 in a revolving number detecting circuit 12, is operated so as to maintain the igniting condition by a voltage supplied through a diode 16 from a first pulser coil 9, therefore, the second SCR14 of the delay angle circuit 10 is ignited and the delay angle circuit 10 is operated. A part of a short-circuit current, being flowed in a short-circuit 6, is flowed in the parallel circuit of a resistor 25 and a capacitor 34 through the resistor 26 and is bypassed, therefore, a time for charging the capacitor 35 is elongated and the condition wherein a control transistor 8 is put ON may be delayed. According to this method, the overspeed may be prevented by a simple constitution. |
