CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

In a control device for an internal combustion engine, the operating range of the internal combustion engine is divided into a plurality of subranges, and one of the subranges is set as a reference range (S14). A ratio between a feedback correction factor calculated when the internal combustion engine operates in the reference range and that calculated when the internal combustion engine operates in a range other than the reference range is calculated, and the ratio is retained as an individual difference correction factor (S16). An alcohol concentration correction factor is calculated on the basis of the feedback correction factors, modified using the individual difference correction factor, and retained (S16, S18). When the internal combustion engine operates in an operating range in which the feedback control cannot be performed, the amount of fuel to be injected is corrected using the modified alcohol concentration correction factor. With this, the amount of fuel to be injected can be corrected using the alcohol concentration correction factor modified so as not to involve the individual difference even when the internal combustion engine operates in an operating range in which the feedback control cannot be performed. That is, the amount of fuel to be injected can be corrected to an optimum value in accordance with the alcohol concentration, and thereby accuracy in controlling the fuel correction can be improved.