IGNITION DIAGNOSIS USING IONIZATION SIGNAL

摘要

PROBLEM TO BE SOLVED: To provide an ignition diagnosis and feedback control system to use the ionization current feedback in an internal combustion engine.

SOLUTION: The ignition parameters for the next generation "smart" ignition system control such as the primary charge timing, the primary charge duration, the ignition/spark timing, and the ignition/spark duration are monitored by using the ionization signal from an ionization detection circuit. In addition, carbon fouling of a spark plug and overheat of a plug insulator are detected by using the ionization signal. These parameters can be monitored for each engine cycle for every cylinder of the engine.

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