| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal combustion engine control unit capable of suppressing the reduction of exhaust gas purification performance resulting from irregularity among cylinders even if an intake-port fuel injection valve and an in-cylinder fuel injection valve are provided.SOLUTION: An internal combustion engine 11 comprises: a port injector 22; an in-cylinder injector 17; a catalyst 100 for exhaust gas purification; and an upstream sensor 35 that outputs an output value in response to an actual air-fuel ratio on upstream of the catalyst 100. A control unit 30 corrects a target air-fuel ratio for an air-fuel ratio control by a first correction value set on the basis of the degree of irregularity of the quantity of fuel injected from the port injector 22 among cylinders, and by a second correction value set on the basis of the degree of irregularity of the quantity of fuel injected from the in-cylinder injector 17 among the cylinders. A correction amount of the target air-fuel ratio by the first correction value is set larger as an injection rate of an intake-port fuel injection valve is higher, and a correction amount of the target air-fuel ratio by the second correction value is set larger as an injection rate of the in-cylinder fuel injection valve is higher.SELECTED DRAWING: Figure 1 |
