| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for an internal combustion engine capable of suppressing wrong learning of concentration of fuel vapor, in the control device for the internal combustion engine learning concentration of fuel vapor to be purged based on an air fuel ratio feedback correction coefficient and largely correcting the air fuel ratio feedback correction coefficient immediately after restoration from fuel cut in a rich side. SOLUTION: This electronic control device 40 calculates the air fuel ratio feedback correction coefficient such that an actual air fuel ratio of the internal combustion engine 10 becomes a target air fuel ratio, and corrects fuel injection amount. In addition, the electronic control device 40 learns the concentration of the fuel vapor to be purged based on the air fuel ratio feedback correction coefficient, and makes an increase correction of the fuel injection amount by increasing the air fuel ratio feedback correction coefficient immediately after restoration from fuel cut. Until a predetermined period passes after the restoration of the fuel cut, the electronic control device 40 sets an update degree of the concentration learning of the fuel vapor to small. COPYRIGHT: (C)2005,JPO&NCIPI
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