Method for ignition detection for spark plug of internal combustion engine of motor vehicle, involves outputting error indication when difference amount between maximum amounts of two ignitions exceeds preset difference threshold

摘要

The method involves determining maximum amounts (8', 8'', 8''', 8'''') of secondary voltage (3) of a spark plug at individual ignitions, where the secondary voltage is inductively determined. The maximum amounts of the secondary voltage are stored in a memory device. A difference amount between the maximum amounts of the two ignitions is determined, and an error indication is output when the difference amount exceeds a preset difference threshold (10). The difference threshold is changeable based on a parameter of an internal combustion engine.