| 摘要 |
This invention relates to a control device for an internal combustion engine that includes an exhaust gas sensor in which an exhaust gas-side electrode of a sensor element is covered with a catalyst layer, and that effectively corrects a sensor output deviation in a vicinity of a stoichiometric ratio. In a control device for an internal combustion engine including an air-fuel ratio sensor 22 that includes a catalyst layer 38 that covers an exhaust gas-side electrode 42, an oxygen storage capacity of the catalyst layer 38 is acquired based on a sensor output of the air-fuel ratio sensor 22 (step 102). The sensor output is corrected if the oxygen storage capacity is higher than a predetermined value and the sensor output is in a predetermined range in the vicinity of the theoretical air-fuel ratio (step 114). Preferably, the oxygen storage capacity is calculated by integrating the product of a deviation amount ”A/F of the sensor output with respect to the theoretical air-fuel ratio and a dwell time thereof. A correction period in which a correction operation is performed is set based on the oxygen storage capacity. |
