| 摘要 |
A control device for an internal combustion engine according to the present invention (the present device) changes the combustion state of air fuel mixture such that if at least the load on the engine 10 falls within the range between a first threshold value Pem1 and a second threshold value Pem2, a heat release rate gravity center position Gc is equal to a given crank angle ¸a independent of an engine load, or if the engine load falls within the range beyond the second threshold value Pem2, the heat release rate gravity center position Gc is changed to a value on a retarded angle side in a range closer to the retarded angle side than the given crank angle ¸a as the engine load is increased. A combustion state is changed by, for example, one or more of combustion parameters such as a main injection period of fuel, a fuel injection pressure (common-rail injection system pressure), the injection quantity, the timing, and the number of times of pilot injection, a turbocharging pressure, and an EGR amount. |
