METHOD FOR DETECTING COMBUSTION NOISE IN INTERNAL COMBUSTION ENGINE, COMBUSTION NOISE DETECTION DEVICE, AND DEVICE FOR CONTROLLING INTERNAL COMBUSTION ENGINE

摘要

Methods for modifying the combustion method of an internal combustion engine in accordance with a driving state have been proposed, but the situation in which combustion noise occurs may vary in different combustion methods, and the accuracy of detecting combustion noise is low because conventional detection methods cannot differentiate between combustion methods. Combustion noise can be detected with good accuracy by ascertaining the combustion mode of the internal combustion engine, and selecting, on the basis of the combustion mode, the detection frequency or the detection frequency range of a combustion noise sensor for detecting combustion noise in the combustion chamber of an internal combustion engine to detect combustion noise.