| 摘要 |
PROBLEM TO BE SOLVED: To accurately correct a change portion of an air-fuel ratio sensor output caused by fluctuation of exhaust pressure.SOLUTION: An internal combustion engine control device for controlling an air-fuel ratio of an internal combustion engine on the basis of sensor output that is output of an air-fuel ratio sensor provided in an exhaust passage of the internal combustion engine includes: first means (S200-S280) for detecting an electric current IL flowing in the air-fuel ratio sensor by changing applied voltage VP to the air-fuel ratio sensor to detect change amount ΔIL of the electric current IL relative to a change of predetermined amount (=V1-V2) of the applied voltage VP; second means (S290) for calculating a correction value for collecting a change portion of the sensor output caused by fluctuation of the exhaust pressure received by the air-fuel ratio sensor on the basis of detection results obtained by the first means; and third means (S130) for correcting the sensor output used for controlling the air-fuel ratio by using the correction value calculated by the second means.SELECTED DRAWING: Figure 4 |
