Patent ID: 7549414
Filing Date: 2009-06-23
Classification: F02D

Abstract:
1. A control apparatus for an internal combustion engine which generates power by burning a mixture of fuel and air in a combustion chamber comprising: in-cylinder pressure detecting means for detecting an in-cylinder pressure in a combustion chamber; in-cylinder energy calculating means for calculating a heat quantity in the combustion chamber based upon the in-cylinder pressure detected by the in-cylinder pressure detecting means; and air-fuel ratio determining means for determining an air-fuel ratio in the combustion chamber based upon the heat quantity calculated by the in-cylinder energy calculating means, wherein: the in-cylinder energy calculating means calculates a heat quantity of air aspired into the combustion chamber and a heat generation quantity by combustion of fuel provided to the combustion chamber; and the air-fuel ratio determining means determines an air-fuel ratio in the combustion chamber based upon the heat quantity of the air and the heat generation quantity of the fuel calculated by the in-cylinder energy calculating means.