Control device for internal combustion engine

Abstract

There is provided an art of performing correction of a coefficient in a model calculation formula of an intake valve model that is applied to an internal combustion engine including a turbocharger, in a wide engine operation region. An amendment value α of a map value a in a correction value calculating operation region is calculated (step), and a straight line expressing a relation of a turbocharging pressure Pcmp and a cylinder air filling rate KL is calculated (step S). A point (Pcmp, KL) on the calculated straight line is specified (step S), and correction of the map value a is performed (step S). Thereby, a correction value a' of the map value a in an operation region that differs in the turbocharging pressure Pcmp from the correction value calculating operation region is calculated. Similarly, the correction value a′ of the map value a in an operation region that differs in valve opening timing EXVT from the correction value calculating operation region, and the correction value a′ of the map value a in an operation region that differs in an engine speed NE from the correction value calculating operation region are calculated (steps Sand S).