| 摘要 |
PROBLEM TO BE SOLVED: To accurately calculate a heat generation rate gravity center position even if there is an error in a parameter which is used for the calculation of the heat generation rate gravity center position.SOLUTION: A control device of an internal combustion engine calculates a heat generation rate dQ on the basis of in-cylinder pressure, calculates a heat generation rate gravity center on the basis of the heat generation rate, corrects the heat generation rate gravity center position Gca by using a first correction coefficient Kca and a second correction coefficient Khr, and performs combustion control by using the corrected heat generation rate gravity center position. There is performed at least either of correction coefficient calculation at which fuel injection is performed at a fuel cut operation, and which calculates a correction coefficient for setting deviation &Dgr;Gca between the heat generation rate gravity center position at the execution of the fuel injection and a reference position at zero as the first correction coefficient, and correction coefficient calculation at which fuel injection is performed at the fuel cut operation, and which calculates a correction coefficient for setting deviation &Dgr;Ghr between a heat generation rate at the heat generation rate gravity center position at the execution of the fuel injection and a reference heat generation rate, or between a heat generation rate corresponding to a heat generation rate gravity center point at the execution of the fuel injection and the reference heat generation rate at zero as the second correction coefficient. |
