The object of the invention is to improve mountability on a vehicle by realizing a compact arrangement of a particulate filter 5 and selective reduction catalyst 6 while ensuring satisfactory reaction time for generation of ammonia from urea water. In an exhaust emission control device having particulate filter 5 incorporated in an exhaust pipe 4, selective reduction catalyst 6 capable of selectively reacting NO x with ammonia under the presence of oxygen being arranged downstream of the particulate filter, urea water as reducing agent being adapted to be added between the selective reduction catalyst 6 and the particulate filter 5, the particulate filter 5 is arranged in parallel with the selective reduction catalyst 6. An S-shaped communication passage 9 is arranged for introduction of the exhaust gas 3 from a rear end of the particulate filter 5 to a front end of the adjacent selective reduction catalyst 6 in a forward folded manner. A urea water addition injector 11 is arranged midway of the communication passage 9.
EXHAUST EMISSION CONTROL DEVICE
ABGASREINIGUNGSVORRICHTUNG
APPAREIL DE PURIFICATION D'ÉCHAPPEMENT
2018-10-03
Patent
Electronic Resource
English
IPC: | F01N GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL , Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein / B01D SEPARATION , Trennen / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen |