| 摘要 |
PURPOSE:To secure an accurate timing advance motion all the time, by comparing a chopping wave voltage to be secured at both ends of an integrating capactor with a triangular wave voltage to be secured at both ends of a pumping-up capacitor and thereby generating an ignition signal. CONSTITUTION:An ignition circuit 10 makes an exciter coil 6 an ignition power source and secures the ignition motion in controlling a primary current of an ignition coil 1 through a discharge controlling thyristor 4. In this case, when an ignition signal is fed to the thyristor 4 and the ignition timing is set, an integrating capacitor 28 being charged in a range from a generating position of a signal VS2 to be generated later in two signals VS1 and VS2 out of a signal coil 12 to the next generating position of the signal VS2 and a pumping-up capacitor 40 being charged for constant voltage in a moment both are installed. And, according to the result of comparison between a triangular wave voltage and a square wave voltage secured at both ends of each of these capacitors 28 and 40, an igniter is so constituted to generate the ignition signal at the generating position of the signal VS1 or VS2. |
