Patent ID: 6155241
Filing Date: 2000-12-05
Classification: F02P,G01L

Abstract:
A method for detecting knocking combustion in an internal combustion engine having an ignition system where a duration of the ignition spark burning time for the spark plug (ZK) is changed in dependence on a load condition of the internal combustion engine, and having an ion current measurement device, which determines pressure development inside the combustion chambers of the internal combustion engine at an end of the spark burning time, said method comprising using an ignition system designed as an alternating current ignition system that provides an alternating ignition voltage, controlling the duration of the ignition spark burning time for the spark plug (ZK) without loss by specifying a number of amplitudes of the alternating ignition voltage necessary for forming an ignition spark at the spark plug (ZK), and changing the ignition energy of the ignition spark for the spark plug (ZK) according to the load condition of the internal combustion engine and other characteristic values made available by the engine.