CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

The invention relates to a control device of an engine, comprising fuel supplying means (21), target fuel supply amount setting means, fuel supply command value providing means, supplied air amount detection means (71), air-fuel ratio detection means (76U), air-fuel ratio calculation means, exhaust gas component concentration detection means (77) and exhaust gas component concentration calculation means. In the invention, the fuel supply command value or the fuel supply amount grasped therefrom is amended and the amount of the air detected by the supplied air amount detection means is amended such that the difference between the air-fuel ratio detected by the air-fuel ratio detection means and the air-fuel ratio calculated by the air-fuel ratio calculation means and the difference between the concentration of the specified component detected by the exhaust gas component concentration detection means and the concentration of the specified component calculated by the exhaust gas component concentration calculation means become small.