| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such a problem that exhaust a gas purification capacity of a catalyst device is degraded when the amount of oxygen stored in a catalyst device is insufficient when executing OT-increase control for controlling degradation caused by the temperature rise of the catalyst device. <P>SOLUTION: This control device of an internal combustion engine has an OT-increase control means which increases a fuel injection quantity in an engine 20 when the temperature of a three-way catalyst 40 (catalyst device) exceeds an OT-increase temperature, and enriches an air-fuel ratio in the engine 20. The control device of the internal combustion engine performs the lean control of the air-fuel ratio in the engine 20 during a period from a time when the three-way catalyst 40 reaches a predetermined state until it reaches the OT-increase temperature on the basis of a required time from the time when the three-way catalyst 40 reaches the predetermined state until the time when it reaches the OT-increase temperature and a difference oxygen storage quantity between the oxygen storage quantity at the point of time when the three-way catalyst reaches the predetermined state and the maximum oxygen storage quantity of the three-way catalyst 40. <P>COPYRIGHT: (C)2013,JPO&INPIT |
