| abstract |
The present invention relates to an arrangement and a method for a supercharged combustion engine (1) for injecting a medium, such as a urea solution, in an exhaust 5 line (3). The exhaust line (3) has a first section (3a) situated upstream of a turbine (4), and a second section (3b) situated downstream of said turbine (4), with respect to the intended direction of flow of the exhaust gases through the exhaust line (3). A medium-source (15, 15') contains the medium in liquid form, and an injection means (19, 19') is adapted to injecting the medium in the second section (3b) of the exhaust 10 line. The arrangement comprises a heat exchanger (13, 13') in which the medium is adapted to being warmed by exhaust gases from the first section (3a) of the exhaust line to such a temperature as to provide assurance that it will vaporise when it is injected into the second section (3b) of the exhaust line. |