Device and method for controlling internal combustion engine

摘要

An internal combustion engine ( 1 ) generates power by burning a mixture of fuel and air in each combustion chamber 3 . The internal combustion engine 1 is provided with an in-cylinder pressure sensor ( 15 ) disposed in each combustion chamber ( 3 ) and an ECU ( 20 ). The ECU ( 20 ) calculates control parameters at two predetermined points, each of which is a product of an in-cylinder pressure detected by the in-cylinder pressure sensor ( 15 ) and a value obtained by exponentiating an in-cylinder volume at the timing of detecting the in-cylinder pressure with predetermined index, as well as calculates a correction value of a fuel injection quantity based upon a difference in the control parameter between the two predetermined points. One of the two predetermined points is set after an intake valve (Vi) opens and before an ignition plug ( 7 ) ignites, and the other is set after the ignition plug ( 7 ) ignites and before an exhaust valve (Ve) opens.