Nippondenso Co., Ltd.

Toshi Suda

Susumu Akiyama

Masakazu Ninomiya

Norio Omori

Hiroyasu Fukaya

An ignition timing control method and an apparatus for internal combustion engines in which the ignition timing of the engine is calculated from a base value obtained by detecting a first operation state of the engine and from a learned correction value obtained in accordance with the record content of a nonvolatile memory, the ignition timing being corrected by rewriting the nonvolatile memory in accordance with the detection result of second and third driving states of the engine, as desired.

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Nagoya, Japan

Toshi Suda