Ignition energy management with ion current feedback to correct spark plug fouling

摘要: A system and method for operating an engine having ionization signal sensing include detecting plug fouling controlling the using progressively more aggressive control strategies if condition persists. first strategy may be used when number of starts or running time are below corresponding thresholds a second otherwise. The employ procedures to eliminate spark deposits that repetitive sparking, exhaust cycle increasing loading, advancing timing, air/fuel ratio, idle speed, example. similar corrective actions employed in different order and/or lesser degree attempt without any noticeable change operation performance as perceived by vehicle operator. applied individual cylinders, cylinder banks, all cylinders.