Nippondenso Co., Ltd.

Nippon Soken, Inc.

Masato Soumiya

Hisasi Kawai

Norihito Tokura

Seiji Morino

Masahiro Goto

In an ignition device for an internal combustion engine, the ignition device comprises: three closed circuits including first, second and third closed circuits, each circuit having at least a DC power source, a primary coil and a switching transistor; an ignition coil having three primary coils and a secondary coil; an ignition command signal generating means producing first and second ignition command signals, the first ignition command signal being applied to the third closed circuit and the second ignition command signal being applied to the control circuit; and a control circuit for causing the first and second switching elements to push-pull operate based on the input timing of the second ignition command signal.

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Anjo, Japan

Masato Soumiya