| 摘要 |
The present invention relates to a regeneration abnormality determination device for a particulate filter (5), and the device is provided with a temperature sensor (10) which detects the inlet exhaust temperature of the particulate filter (5), and a control unit (11) which feedback controls the fuel addition injection amount of a fuel addition valve (8) on the basis of the actual measurement value of the temperature sensor (10) in a predetermined temperature range around a regeneration target temperature in order to keep the inlet exhaust temperature of the particulate filter (5) at the regeneration target temperature during forced regeneration, the control unit (11) being configured so as to perform the simulated calculation of the inlet exhaust temperature of the particulate filter (5) on the basis of an indicated injection amount for the fuel addition valve (8), and detect the abnormality of the feedback control on the basis of the state of the discrepancy between the calculation amount of the inlet exhaust temperature and the actual measurement value of the temperature sensor (10). |
