EXHAUST PURIFYING DEVICE

摘要

The present invention relates to an exhaust purifying device configured to more appropriately control a temperature of an oxidation catalyst (C2), which is capable of purifying ammonia, provided in an exhaust system. The present invention is provided with a selective reduction type NOx catalyst (C1) provided in an exhaust passage (P) for achieving a NOx purification capacity under existence of ammonia, an oxidation catalyst (C2) provided downstream of the selective reduction type NOx catalyst (C1), and a heat reserving material (TSM) which is provided between the selective reduction type NOx catalyst (C1) and the oxidation catalyst (C2) and is capable of reserving heat of an exhaust gas. Preferably a phase transition temperature of the heat reserving material (TSM) is a temperature within an ammonia purification temperature region of the oxidation catalyst (C2).