| 摘要 |
PROBLEM TO BE SOLVED: To enhance accuracy of atmospheric air correction and to improve accuracy of various controls using an output value of an oxygen concentration sensor. SOLUTION: A fuel injection valve 19 is provided for an intake port of an engine 10 and an A/F sensor 32 for detecting an oxygen concentration of which detection object is exhaust gas is provided for an exhaust pipe 24. An ECU 40 executes fuel cut by stopping fuel injection by the fuel injection valve 19 as a predetermined operation condition is satisfied and executes an atmospheric air correction process while executing the fuel cut and calculates an output correction value for correcting correspondence gap between the output value of the A/F sensor 32 and the oxygen concentration based on the output value of the A/F sensor 32. Especially, the ECU 40 acquires exhaust gas pressure information after starting the fuel cut and changes an execution mode of the atmospheric air correction process based on the exhaust gas pressure information. COPYRIGHT: (C)2009,JPO&INPIT
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