ENGINE CONTROLLER AND ENGINE OPERATING METHOD

摘要

[PROBLEMS] To prompt personnel to repair an SCR device if an abnormality occurs in the SCR device so as to appropriately manage the SCR device. [MEANS FOR SOLVING PROBLEMS] If an abnormality having occurred in an SCR device is detected, the output of an engine is limited. In an example, for this limitation, the map used to calculate the injected amount of fuel is changed from the one for the normal operation if an abnormality occurs (S407). Abnormalities to be detected include clogging of an injection nozzle and dilution of the urea water held in a tank.