FIELD: machine building.
SUBSTANCE: method for obtaining the gas flow containing reducing agent (24) in the exhaust system of exhaust gases (EG), formed during the work of an internal combustion engine (ICE), consisting in the fact that A) is prepared by at least one precursor (12, 28, 34) of the reducing agent such as aqueous solution of urea, B) at least one precursor (12, 28, 34) of the reducing agent is evaporated with formation of gas stream (13), B) gas flow (13) is at least partially heated, F) precursor (12, 28, 34 ) of the reducing agent in gas stream (13) is at least partially converted to a reducing agent, and D) gas stream (24) containing a reducing agent is added to EG (25) formed in the work of the internal combustion engine, differing in that the evaporation in step b) is performed at 180 °C and below, the heating in step B) is performed up to a temperature ranging from 250 °C to 550 °C, step B) and C) represent a two-stage heating.
EFFECT: reduced energy losses and increased adjustability of the dynamic supply of a reducing agent.
12 cl, 5 dwg
