| 摘要 |
PROBLEM TO BE SOLVED: To provide an abnormality determination device for fuel injection valves, which can immediately determines the occurrence of stuck open at high accuracy while suppressing the generation of incorrect determination. SOLUTION: The abnormality determination device, in which pressure sensors 46 for detecting the pressure of fuel supplied to the fuel injection valves 20 are provided at the fuel injection valves 20 provided for each cylinder of an internal combustion engine, respectively, determines the occurrence of stuck open in the fuel injection valve 20 which has injected the fuel on the basis of the changes in the condition of the fuel pressure detected by the pressure sensor 46 provided at the fuel injection valve 20 which has injected the fuel and the changes in the condition of the fuel pressure detected by the pressure sensor 46 provided at the fuel injection valve 20 which has not injected the fuel. COPYRIGHT: (C)2011,JPO&INPIT
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