| 摘要 |
<p>PROBLEM TO BE SOLVED: To distinguish an abnormal operation of a waste gate valve 27 and abnormal variation of air-fuel ratios among cylinders, in an abnormality detecting device of a multicylinder-type internal combustion engine 1 in which a supercharger 25 is loaded, and the waste gate valve 27 is disposed in a waste gate passage 26 bypassing a turbine 25b of the supercharger 25.SOLUTION: An abnormality detecting device determines the presence or absence of an abnormal operation of the waste gate valve 27, and determines the presence or absence of abnormal variation of air-fuel ratios among cylinders in a state of closing the waste gate valve 27, when the absence of abnormality is determined.</p> |
