| 摘要 |
PURPOSE:To prevent the erroneous ignition when the withstand voltage of an SCR reduces, by charging a condenser only within a regular ignition-timing range determined according to the positive and negative output voltages of a pulser coil. CONSTITUTION:The positive output voltage of a pulser coil 14 charges a condenser C2 through a diode D7, and the both-terminal voltage turns ON a transistor Q1. While, the negative output voltage of the pulser coil 14 puts an SCR11 into electric conduction through a parallel circuit consisting of a diode D8, resistor R9, and a condenser C3, and further turns ON a transistor Q2, and the base of the transistor is connected to the emitter through a resistor 10, and further grounded through a resistor R11. Therefore, a condenser C0 is controlled so as to be charged only within a regular ignition timing range determined by the positive and negative output voltages of the pulser coil 14. |
