Ngk Spark Plug Company, Limited

Koji Yamamoto

Isao Suzuki

Hiroshi Inagaki

An ignition timing control device has a knocking detection unit and an ignition timing adjustment unit. In a condition that the operation state of the internal combustion engine is suitable for adjustment of the ignition timing, the ignition timing control device outputs to an igniter an adjusted ignition signal as adjusted (corrected) by an adjusted ignition timing determination process. The ignition timing control device outputs to the igniter a reference ignition signal as it is outputted from an internal combustion engine control unit without adjustment (correction) in a condition that the operation state of the internal combustion engine is not suitable for adjustment of the ignition timing.

Ignition timing control device and ignition timing control system

The present invention provides an ignition timing control device and ignition timing control system for an internal combustion engine, capable of controlling an ignition timing of the engine promptly in response to a change in engine operating conditions. An ignition timing adjustment unit () is adapted to correct the ignition timing to a proper ignition timing in a retard region with reference to a maximum advance value based on a knocking signal outputted from a knocking detection unit () and a reference ignition signal (A) outputted from an external electronic control unit (). The output signal from the ignition timing adjustment unit () can be thus promptly adjusted by retarding the ignition timing relative to a reference ignition timing given from the external electronic control unit () upon detection of engine knocking.

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Konan, Japan

Koji Yamamoto