| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control device for an internal combustion engine capable of setting a request injection time of a fuel injection valve within an allowable range (a range of the injection time guaranteed in operation), in regard to an internal combustion engine capable of using alcohol-mixed fuel. Ž<P>SOLUTION: An alcohol concentration of fuel is estimated based on the control state or the like of air-fuel ratio feedback control, and a request injection time is set based on the alcohol concentration of the fuel and the engine operating state. When it is determined that the request injection time is shorter than a lower limit value of an allowable range, the ignition time is corrected to be delayed, and the requested injection time is corrected to be increased to compensate torque by a quantity reduced by correction for delaying the ignition time by using the torque by a quantity increased by correction for increasing the fuel injection quantity. By this structure, injection accuracy is secured by correction to elongate the requested injection time to a lower limit value of the allowable range or longer, thus preventing torque fluctuation caused by the correction for delaying the ignition time. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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