| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device which can surely detect an imbalance state that a variation of an air-fuel ratio between cylinders becomes large while having a constitution which corrects an injection time with respect to a deteriorated injector.SOLUTION: This control device 100 comprises an abnormality determination part 114 which determines whether or not there occurs an imbalance state that a variation of an air-fuel ratio between cylinders 300 becomes excessively large by comparing an inclination of a temporal change of an air-fuel ratio which is measured by an air-fuel ratio sensor 500, and a prescribed threshold T. The abnormality determination part 114 compares the inclination and the threshold Tafter correcting either of the inclination or the threshold Ton the basis of either of a deterioration degree or a corrected injection time.SELECTED DRAWING: Figure 1 |
