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.SolutionIn the following, a predetermined series of vibration waveforms included in the vibration waveform is referred to as "individual waveform Wo".The end determination section determines the end portion of each individual waveform Wo and recognizes the boundary of the individual waveform wo.The feature extraction unit 33 extracts the features PS, PM and PE of the individual waveforms Wo based on the recognition of the boundary.The knock judging section 35 determines whether or not the characteristic of the individual waveform Wo extracted by the feature extracting section 33 is characteristic of the knock waveform.Then, it is determined that knocking is performed on the condition that the characteristic of one of the individual waveforms Wo is judged as a characteristic of the knock waveform.Diagram