Control device for internal combustion engine

A control device for an internal combustion engine, the control device comprising:

• catalyst temperature acquisition means for acquiring a catalyst temperature of a catalyst disposed in an exhaust path of the internal combustion engine;
• abnormal combustion detection means for detecting an abnormal combustion that has occurred in a combustion chamber of the internal combustion engine;
• gas control means for controlling the amount of intake gas flowing into the combustion chamber and a temperature of exhaust gas flowing into the catalyst;
• fuel injection amount control means for controlling the amount of fuel injected into the combustion chamber;
• and
• abnormal combustion inhibition mode selection means for choosing one of a first mode, a second mode, and a third mode in accordance with the catalyst temperature acquired by the catalyst temperature acquisition means when an abnormal combustion is detected by the abnormal combustion detection means, the first mode causing the gas control means to suppress the occurrence of the abnormal combustion while raising the catalyst temperature, the second mode causing the fuel injection amount control means to suppress the occurrence of the abnormal combustion while inhibiting an increase in the catalyst temperature, the third mode causing the gas control means and the fuel injection amount control means to suppress the occurrence of the abnormal combustion.