| 摘要 |
PROBLEM TO BE SOLVED: To provide a diagnosis device of a fuel injection amount control device which can suppress that an error occurs in a diagnosis result of the presence or absence of an abnormality of the fuel injection amount control device.SOLUTION: A microcomputer 21 determines the presence or absence of an abnormality of a fuel injection amount control device on the basis of a comparison of a required injection amount being a command value of a fuel amount which is injected from an injector 14 during one cycle of an engine, and a total monitor injection amount being a total value of a monitor injection amount which is acquired from an electricity-carrying time monitor value of the injector 14 at each fuel injection during one cycle of the engine. The microcomputer 21 performs removal processing such that when the monitor injection amount is smaller than a determination value, a micro injection correction amount is removed from the monitor injection amount, and on the other hand, when the monitor injection amount is not smaller than the determination value, the micro injection correction amount is not removed from the monitor injection amount. Then, a total value of the monitor injection amount after the removal processing is set as the total monitor injection value.SELECTED DRAWING: Figure 1 |
