Nippondenso Co., Ltd.

Shiro Shimada

Hiroshi Haraguchi

Toshiharu Iwata

An ignition timing control arrangement for an internal combustion engine having a plurality of cylinders. It is determined whether the same cylinder is knocking on successive engine cycles or whether different cylinders are knocking. The ignition timing of only a single cylinder is retarded to cause a non-knocking ignition if the same cylinder is knocking on successive engine cycles. However, ignition timing of all cylinders is retarded to minimize the knocking and maximize the engine torque if different cylinders are knocking.

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Kariya, Japan

Shiro Shimada