COMBUSTION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

PROBLEM TO BE SOLVED: To provide a combustion control device that can absorb difference in structural characteristics of internal combustion engines for correct determination of knocking.SOLUTION: The combustion control device includes: a first memory means for storing a first standard determination value TY for determining the knocking based on a vibration detection value Y of a standard instrument; a second memory means for storing a second standard determination value TX for determining the knocking based on an ion detection value X for a predetermined operating region of the standard instrument; a first means for identifying correlation Y=G(X) indicating a relation between the ion detection value X and the vibration detection value Y based on multiple sets of a vibration signal V1 and an ion signal V2 in the predetermined operating region for each internal combustion engine; a second means for identifying a first determination value in actual use G(TX) based on the correlation Y=G(X) and the second standard determination value TX; and a third means for correcting the first standard determination value TY based on the relation between the first determination value in actual use G(TX) and the first standard determination value TY.