IGNITION DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide an ignition device for an internal combustion engine capable of reducing manufacturing cost in a simple structure, certainly eliminating spark lack, being made practicable, and being miniaturized. SOLUTION: In this ignition device for the internal combustion engine, a plurality of ignition coils parts 2A and 2B are interconnected in parallel which comprise an ignition coil, a power switching element for switching primary current flowing through primary coils constructing the ignition coil, and a high voltage diode for preventing flowing of current from the high voltage side of secondary coils constructing the ignition coil to an ignition plug side. Primary currents I1A and I1B of a plurality of primary coils 3A and 3B are switched, thereby generating high voltage electric discharge to the ignition plug 31 disposed in a closed circuit formed from a plurality of secondary coils 6A and 6B. The ignition device has an ignition signal output circuit 9 for outputting ignition signals SA and SB for switching the primary currents I1A and I1B of the primary coils 3A and 3B so that discharge currents I2A and I2B of the primary coils 3A and 3B overlap with each other in a predetermined period.