| 摘要 |
PROBLEM TO BE SOLVED: To provide a controller for an internal combustion engine capable of adjusting a discrepancy between a value of an amount of NOx produced in a transient state and a target value by a parameter other than the timing of fuel injection. SOLUTION: The target value of an intake air oxygen concentration is controlled based on the deviation between the standard value of a cylinder wall temperature determined by a drive condition of the internal combustion engine 1, and the present value of the cylinder wall temperature. By controlling the operation of an EGR valve 11 as an instrument for influencing the intake air oxygen concentration according to the target value of the intake air oxygen concentration controlled based on the deviation, the discrepancy between the value of the amount of NOx corresponding to the deviation of the wall temperature and the target value is negated, and the amount of NOx produced is maintained the same as when the cylinder wall temperature is the standard value. COPYRIGHT: (C)2004,JPO
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