KNOCKING DETERMINATION DEVICE OF INTERNAL COMBUSTION ENGINE, KNOCKING DETERMINATION METHOD, PROGRAM OF KNOCKING DETERMINATION METHOD REALIZED BY COMPUTER, AND RECORDING MEDIUM RECORDED WITH PROGRAM

摘要

PPROBLEM TO BE SOLVED: To provide a knocking determination device of an internal combustion engine which inhibits incorrect judging of the knocking, a knocking determination method, a program of the knocking determination method realized by computer, and a recording medium recorded with the program. PSOLUTION: In the engine ECU, a vibration strength of a plurality of frequency bands is extracted from the vibration detected by a knock sensor. After multiplying the vibration strength of each extracted frequency band by weighting coefficient, it adds corresponding to the crank angle. Then the program is executed while consisting of a computing step S104 of an accumulated value in every 5 degrees, a step S116 calculating a correlation coefficient K based on the result which is compared with the vibration wave form of the frequency band E with a knock wave form model formed previously, a step S118 calculating a knock strength N, a step S122 determining a knocking generation corresponding to the calculated correlation coefficient K and the knock strength N, and a step S126 which judges no generation of the knocking according to the calculated correlation coefficient K and the knock strength N. PCOPYRIGHT: (C)2009,JPO&INPIT