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An ignition system having capacitive storage of energy required for developing ignition pulses, particularly in Otto and Wankel engines, includes a capacitive storage arrangement, a charging circuit connected between the capacitive storage arrangement and a direct current supply for charging the cap

An ignition system having capacitive storage of energy required for developing ignition pulses, particularly in Otto and Wankel engines, includes a capacitive storage arrangement, a charging circuit connected between the capacitive storage arrangement and a direct current supply for charging the capacitive storage arrangement, and an ignition transformer coupled to the capacitive storage arrangement via a thyristor switching arrangement for temporarily discharging the capacitive storage arrangement through the ignition transformer to develop pulses therein for application to spark plugs or the like.

대표청구항 ▼

In a high voltage capacitor ignition system having capacitive storage means for storing energy required for developing fuel ignition pulses for the spark plugs of an engine, the system further including charging circuit means connected between the capacitive storage means and a battery for charging

In a high voltage capacitor ignition system having capacitive storage means for storing energy required for developing fuel ignition pulses for the spark plugs of an engine, the system further including charging circuit means connected between the capacitive storage means and a battery for charging the capacitive storage means, ignition transformer means, and switching means coupled between the capacitive storage means and the transformer means for temporarily discharging the capacitive storage means via the transformer means to develop pulses therein for application to each such spark plug in succession, the improvement wherein: said capacitive storage means comprise a plurality of capacitors each connected to receive charging current from said charging circuit means; and said switching means comprise a plurality of thyristors each coupled between a respective one of said capacitors and a common input of said transformer means and arranged to be fired At successive time intervals to discharge said capacitors in succession to apply a succession of fuel ignition pulses to each spark plug, the succession of pulses thus establishing an effective fuel ignition spark duration proportional to the number of said capacitors, each of said thyristors including a firing electrode and a pair of current-carrying electrodes, and said switching means further comprising firing pulse generator means including a clock pulse generator for producing a plurality of successive clock pulses, and means, including shift register means having a clock pulse input operatively coupled to said clock pulse generator means for receiving the clock pulses produced thereby, for feeding each of the successive pulses to the firing electrode of a respective one of said thyristors so that each of said thyristors is fired in turn.