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这种内燃机火花点火系统由电容、发电机、可控硅和电压调节元件组成。交流发电机由发动机驱动,经整流后向电容器充电,当充电电压达到了预定值时,由电压调节元件使发电机输出短路。当要求产生火花时,可控硅导通,电容器放电,放电回路为一个包括可控硅和点火线圈初级绕组在内的串联回路,从而产生一个火花。这个串联回路还包括一对反向并联的二极管。
This internal combustion engine spark ignition system consists of capacitors, generators, thyristors and voltage regulation components. The alternator is driven by the engine and is rectified to charge the capacitor. When the charge voltage reaches a predetermined value, the alternator is shorted by the voltage regulating element. When a spark is required, the thyristors turn on and the capacitor discharges. The discharge circuit is a series circuit of thyristors and primary windings of the ignition coil, creating a spark. This series circuit also includes a pair of diodes connected in reverse parallel.