DEVICE AND METHOD FOR DETERMINING KNOCKING OF INTERNAL COMBUSTION ENGINE

摘要

An engine ECU executes a program including the step of calculating a correlation coefficient K by dividing the sum SDS(I) of respective absolute values DS(I), which are each a difference between a magnitude in an engine vibration waveform and a magnitude in a knock waveform model for every crank angle, by an area S corresponding to magnitudes equal to or larger than a positive reference value in the knock waveform model (S110), and the step of determining whether or not knocking has occurred based on the correlation coefficient (S116, S120).