| 摘要 |
PROBLEM TO BE SOLVED: To properly control an air-fuel ratio on the basis of output of an oxygen sensor disposed at a downstream side of an exhaust purification catalyst of an exhaust passage.SOLUTION: A control device of an internal combustion engine of an embodiment, includes means for controlling an air-fuel ratio on the basis of output of an air-fuel ratio sensor disposed at an upstream side of a catalyst, and correcting the control of the air-fuel ratio on the basis of output of an oxygen sensor, and means for determining limitation on the correction of the air-fuel ratio control in the direction to suppress enriching of the air-fuel ratio in accordance with increase of a degree of shifting of the output of the oxygen sensor to a lean side, when it is determined that a degree of output tendency in a prescribed lean region is a prescribed lean degree or more, and a degree of output tendency in a prescribed rich region is less than a prescribed rich degree on the basis of a lean tendency value and a rich tendency value indicating the output tendency of the oxygen sensor. |
