Patent ID: 7290387
Filing Date: 2007-11-06
Classification: F02D

Abstract:
1. A control device of an internal combustion engine provided with fuel cut executing means for executing a fuel cut for stopping the supply of fuel to an internal combustion engine mounted in a vehicle when said vehicle is in a decelerating state and fuel cut prohibiting means for prohibiting a fuel cut executed by said fuel cut executing means when a temperature of a catalyst provided in an exhaust system of said internal combustion engine is a predetermined temperature or more, wherein when a fuel cut is prohibited by said fuel cut prohibiting means when the vehicle decelerates in a predetermined period after an increased fuel operation is performed for operating said internal combustion engine so that a combustion air-fuel ratio becomes rich, the internal combustion engine is operated so that the combustion air-fuel ratio becomes lean in said decelerating state or in said decelerating state and its succeeding idling state, wherein catalysts are provided separately at two locations in series in the exhaust system of said internal combustion engine and said predetermined period is deemed to have elapsed when it is judged that even the catalyst provided at the downstream side is in an oxidized state where said catalyst holds sufficient oxygen.