Patent ID: 7270118
Filing Date: 2007-09-18
Classification: F02D,F02M,Y02T

Abstract:
1. A control apparatus of an engine comprising: an intake air amount control means for controlling an air amount sucked into the engine; an EGR flow path coupled to a portion between an exhaust passage and an intake passage of said engine and provided for flowing back a part of an exhaust gas; an EGR amount detecting means for detecting an EGR amount passing through said EGR flow path; an EGR amount control means for controlling the EGR amount passing through said EGR flow path; a fuel supply apparatus supplying a fuel into said engine; a premixed combustion mode starting a combustion after finishing a fuel injection into each of cylinders of said engine; and a diffusion combustion mode starting the combustion during the fuel injection, wherein the control apparatus estimates a cylinder state of said engine on the basis of an output value of said EGR amount detecting means, at a time when said engine is under the premixed combustion mode.