Patent ID: 7243487

Claim:
A control apparatus for an internal combustion engine, comprising: a three-way catalyst disposed in an exhaust system of an internal combustion engine and for performing purification of carbon monoxide and nitrogen oxide; a fuel cut control unit for temporarily performing a fuel supply stop when a fuel supply stop condition is established during an operation of the internal combustion engine; a fuel cut post-return fuel increasing correction unit for performing a fuel increasing correction during a specified period when a fuel supply stop state by the fuel cut control unit is returned to a fuel supply state; and a fuel increasing correction stop unit which compares an integrated value of an amount of air flowing into the three-way catalyst during a period of the fuel supply stop with an integrated value of an amount of air flowing into the three-way catalyst during the fuel increasing correction after a fuel supply return, and stops the fuel increasing correction of the fuel cut post-return fuel increasing correction unit when a comparison value reaches a specified value.