ARRANGEMENT TO INSERT A LIQUID MEDIUM INTO EXHAUSTS FROM A COMBUSTION ENGINE

摘要

Arrangement (1) to insert a liquid medium into exhausts from a combustion engine, comprising : - a mixing chamber (2) intended to be perfused by exhausts and delimited in a radial direction outwards by a first tubular metal wall (6), and - an injection element (10) for injection of the liquid medium as a spray (11) into the mixing chamber, and - an exhaust channel (12) extending along the outside of the first tubular wall. The exhaust channel (12) is delimited in a radial direction outwards by a second tubular wall (13), which guides the exhausts flowing through the exhaust channel so that they pass on the outside of the wall section (6a) of the first tubular wall which is intended to be impacted by said spray. A throttle (14) is arranged in the section (12a) of the exhaust channel which is located on the outside of said wall section (6a) in order to accelerate the exhausts so that these flow with an increased speed over the outside of said wall section (6a).