Knock judgment device and knock control device

摘要

Problem to be solved: to judge the characteristic of the vibration waveform due to a plurality of noises as a characteristic of a single knock waveform, or to judge the characteristic of the vibration waveform by both noise and knock in the characteristic of one noise waveform.In the following, each of the predetermined series of vibration waveforms included in the vibration waveform W is defined as the individual waveform wo.When a plurality of individual waveforms wo are included in the vibration waveform W, the features PS, PM and PE are extracted for each of the plurality of individual waveforms wo.Then, it is judged whether or not the characteristic is the characteristic of the knock waveform of the individual waveform Wo with the characteristic extracted.Then, it is determined that knock is determined by the fact that the characteristic of one of the individual waveforms Wo is judged as a characteristic of the knock waveform.In the state where it is not judged that the knocking is determined by the feature judgment, the presence or absence of knocking is determined by any one of the conditions that the characteristic determination number as the number of the individual waveforms Wo to which the feature judgment has been performed has reached a predetermined threshold value which is two or more.Diagram