Internal combustion engine ignition apparatus

摘要

A resonance inductor is connected with a charging path through which an ignition condenser is charged; a first switching device controls charging of the ignition condenser; discharging of the ignition condenser is controlled by a second switching device whose collector terminal is connected with the other end of the primary coil of an ignition coil unit and whose emitter terminal is connected with the negative-polarity terminal of the ignition condenser; a clamp diode is connected between the one end of the primary coil and the collector terminal of the second switching device.

主权项

1. An internal combustion engine ignition apparatus comprising:
a power source circuit unit that generates a predetermined output; a resonance inductor connected with an output terminal of the power source circuit unit; an ignition condenser that is charged with the predetermined output of the power source circuit unit by way of the resonance inductor; an ignition coil unit provided with a primary coil whose one end is connected with a positive-polarity terminal of the ignition condenser and a secondary coil that is magnetically coupled with the primary coil and generates an ignition voltage when energy produced through discharge of the ignition condenser is supplied thereto; an ignition plug that is provided with a pair of electrodes facing each other through a gap, one of the pair of electrodes of which is connected with the secondary coil, and that causes a spark discharge between the electrodes when the ignition voltage is applied across the pair of electrodes so as to ignite an inflammable fuel-air mixture supplied to an internal combustion engine; a control circuit unit provided with a first switching device placed in a charging path through which the ignition condenser is charged and a second switching device whose collector terminal is connected with the other end of the primary coil and whose emitter terminal is connected with a negative-polarity terminal of the ignition condenser; and a first diode connected between the one end of the primary coil and the emitter terminal of the second switching device, wherein based on an ignition signal for the internal combustion engine from the outside, the control circuit unit turns on the first switching device so that the ignition condenser is charged, and based on the ignition signal, the control circuit unit turns on the second switching device so that the ignition condenser is discharged.