Spark plug based engine combustion diagnostics have the advantage of simplicity and easy access. Over the years there has been considerable interest in developing and applying spark plug ionization probes to monitor the in-cylinder combustion process. In this paper, alternative approaches are presented using the spark plug as the primary sensor. These methods are based on the analysis of the spark voltage and a secondary high-voltage discharge. A series of experiments have been conducted to evaluate their potential in the measurement of combustion quality and the detection of misfire. It is found that the spark voltage decay time is related to the initial flame kernel development and may be used to detect misfire and deteriorating combustion quality in the initial flame development. The results also show that the analysis of secondary voltage decay time could be an effective means of monitoring the combustion quality and detecting misfire during the main combustion period.
Engine performance monitoring using spark plug voltage analysis
Motorleistungsmessung an Benzinmotoren durch Analyse und Bewertung des Zündspannungsverlaufs an der Zündkerze bei Berücksichtigung der Zündeinstellungen
1997
11 Seiten, 22 Bilder, 1 Tabelle, 6 Quellen
Article (Journal)
English
Engine performance monitoring using spark plug voltage analysis
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