| 摘要 |
PROBLEM TO BE SOLVED: To provide the responsiveness, accuracy and reliability of EGR control. SOLUTION: The feedback control of an EGR valve is carried out based on a sucked air quantity sensed by an air flow sensor 11 of an engine intake system, the correction of the feedback control is carried out based on oxygen concentration sensed by an oxygen concentration sensor 17 of an engine exhaust system, and whether or not there is abnormality in the feedback is diagnosed. |
