Ignition mis-firing detection method for IC engine with two spark plugs per cylinder

摘要

The ignition fault detection method uses simultaneous measurement of the ion current signal for each spark plug of each engine cylinder, with integration of the measured signals over the full combustion cycle. The obtained integration values for both spark plug signals are compared with one another to allow an ignition fault to be detected. Alternatively the ion current values for the spark plugs of each cylinder are measured in alternation and their integrated values are compared with values provided by a characteristic field.