| 摘要 |
PROBLEM TO BE SOLVED: To provide a diagnosis device of an injector which can diagnose the presence/absence of the corrosion of an injection hole of the injector.SOLUTION: A diagnosis device (10) of an injector of an internal combustion engine (20) comprises a heat generation body (80) which generates heat when applied with electricity in a combustion chamber (25); and the injector (70) which injects fuel into the combustion chamber. The diagnosis device also comprises a diagnosis part (11) which determines that an injection hole (73) of the injector is corroded when a difference between a fuel injection amount of the injector and a prescribed reference value is within a prescribed range, and when a temperature of the heat generation body which is applied with electricity or an index having a correlation with the temperature is lowered to the prescribed reference value or lower. |
