Kokusan Denki Co., Ltd.

Katsuo Murakami

Mitsuo Katsumata

Hirotoshi Nanjo

Mitsunori Miyamoto

An ignition system for an internal combustion engine comprises a primary current control switch provided in parallel with an exciter coil and the primary of the ignition coil, energized by an exciter coil producing an AC voltage in time with rotation of the engine crank shaft. The primary current control switch is made conductive in advance of the ignition angle to permit a current to flow therethrough, and is made nonconductive at the ignition angle to cause sudden increase in the primary current. The ignition system is characterized in that the core of the ignition coil has a magnetic retentivity and by comprising resistor means for providing a path for a current through the primary in the opposite direction to the current which flows through the primary at the ignition angle.

Ignition system for an internal combustion engine

A capacitance discharge type breakerless ignition system for an internal combustion engine, comprising ignition coil means including a main and an auxiliary primary coils and a secondary coil, capacitance means including two capacitances connected to said main and auxiliary primary coils, respectively to be charged by a charging voltage and at least one ignition plug connected to said secondary coil, time constants of said connections of said main primary coil and said corresponding capacitance and of said auxiliary primary coil and said corresponding capacitance when said capacitances are simultaneously discharged through said main and auxiliary primary coils being different from each other whereby said ignition plug is sparkingly discharged for a longer continuation time.

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Numazu, Japan

Katsuo Murakami