Patent ID: 7334569
Filing Date: 2008-02-26
Classification: F02D

Abstract:
1. A control apparatus for an internal combustion engine including a first fuel injection mechanism injecting fuel into a cylinder and a second fuel injection mechanism injecting fuel into an intake manifold, said control apparatus comprising: an injection control unit controlling said first and second fuel injection mechanisms such that said first and second fuel injection mechanisms partake in fuel injection based on a condition required of said internal combustion engine, a sensing unit provided at an exhaust system of said internal combustion engine for sensing an air-fuel ratio of exhaust, and a control unit for executing feedback control such that the air-fuel ratio attains a target air-fuel ratio based on said sensed air-fuel ratio, wherein said control unit executes feedback control by at least a proportional action only on a fuel injection quantity of said first fuel injection mechanism when said first fuel injection mechanism and said second fuel injection mechanism partake in fuel injection.