Ignition system of internal combustion engine

Abstract

Abstract PURPOSE:To reduce the size of each ignition trigger high tension power source circuit by providing one ignition trigger high tension power source circuit for each ignition plug and further providing one discharge power source circuit and each rectifying element for each ignition plug. CONSTITUTION:Signals from a rotary signal generator 1 which determines the ignition timing of each cylinder of an internal combustion engine and the timing of flowing current to a discharging ignition coil 30 are shaped by a wave shaping circuit 2, kept to discharge sparks by a discharge power source circuit 3 and distributed to each cylinder by a distributing circuit 4. In the case of a DC low tension power source 8 (for example a 12V battery on a vehicle) its voltage is increased to about DC 300V by a DC-DC converter 5 and charges a trigger capacitor 6 and is supplied to an ignition circuit 7 which has circuits to generate high tension and make ignition plugs 78 discharge. The ignition circuit 7 has three ignition trigger high tension power source circuits 71, 72 and 73 which are provided corresponding to each cylinder.

Inventors

• 👤 Kazuo Oishi

Bibliographic Details