| 摘要 |
In the present invention, in split fuel injection for injecting fuel multiple times into the same cylinder during one cycle, deterioration of driving performance caused by leaning of the air-fuel ratio occurring due to time degradation of a fuel injection valve, etc., is suppressed. An engine control device is provided with the following: a lean cylinder detection means for detecting, as a cylinder in which leaning occurs, a cylinder from among a plurality of cylinders that is leaner than a prescribed value as compared to the air-fuel ratio of other cylinders; and a fuel injection frequency control means for reducing the frequency of fuel injection in the cylinder in which leaning occurs that was detected by the lean cylinder detection means. |
