INTERNAL COMBUSTION ENGINE KNOCKING JUDGMENT DEVICE AND KNOCKING JUDGMENT METHOD

摘要

A knock intensity N is calculated by using a portion having an accumulated value ß greater than a reference intensity in a knock region and not using a portion having an accumulated value greater than the reference intensity in a region other than the knock region (the knock detection gate from which the know region is excluded) among combined waveforms of amplitude of a first frequency band A to a third frequency band C. When the knock intensity N is greater than a judgment value V (KX), it is judged that knocking has occurred. When the knock intensity N is not greater than the judgment value V (KX), it is judged that no knocking has occurred.