| 摘要 |
An internal combustion engine (1) is provided with a supercharger (12) and provided with a cylinder direct injection type fuel injection valve (10). If a shift to a low-speed supercharging area is performed when the wall temperature of a cylinder bore (3) is low, oil is diluted with liquid fuel adhering to the wall surface of the cylinder bore (3) and scattered in a combustion chamber (4), thereby causing abnormal combustion. In the present invention, at the time of a shift to a predetermined low-speed supercharging area, the lower the wall temperature of the cylinder bore is, the more the amount of fuel is increased, thereby suppressing the temperature of an air-fuel mixture near the compression top dead center and avoiding abnormal combustion. |
