| 摘要 |
An abnormality determination apparatus of a particulate filter (DPF 54) according to an embodiment of the present invention supplies a fuel to a catalytic device (DOC 53) by an unburnt components supply section (an adding fuel valve 35 and an added fuel providing pipe 34) when a specific condition is satisfied, so as to raise a temperature of the catalytic device. Accordingly, a volumetric flow rate of a gas which passes through the DPF increases. Further, the abnormality determination apparatus acquires a differential pressure ”P using a differential pressure acquisition section (differential pressure sensor 77) in a state where the temperature of the catalytic device is raised, and determines whether an abnormality occurs in the DPF 54 on the basis of a comparison result between a correlation value (a final determination value B) correlated with the acquired differential pressure and a predetermined value (a final determination threshold value Sbth). |
