Abstract: An arrangement for introducing a liquid medium into exhaust gases from a combustion engine: A mixing chamber (3) has exhaust gases flow through it. Its downstream end (5) has an endwall (7) of thermally conductive material as an end surface of the mixing chamber (3). An injector injects the liquid medium spray into the mixing chamber (3) or into exhaust gases led into the mixing chamber (3). An exhaust passage (13) adjacent to the mixing chamber (3) is intended for exhaust gases to flow through it and is delineated from the mixing chamber (3) by the endwall (7). Heat flanges (14) of thermally conductive material are situated on at least part of the side of said endwall (7) which faces towards the exhaust passage (13), extend into the exhaust passage (13), absorb heat from exhaust gases which flow through the exhaust passage and give off this heat to the endwall.

Abstract: An exhaust post-treatment device (2) for a vehicle (4) for reducing nitrogen oxides present in the exhaust gases (20) of the vehicle (4) by supply of liquid reducing agent (18) to the exhaust gases (20) in an exhaust pipe (32). The device (2) locally warms a surface (31) within the exhaust pipe (32) by a Peltier element (6) by using thermal energy from the exhaust gases (20) to vaporize liquid reducing agent (18) which reaches the surface (31), thereby avoiding the formation of deposits of reducing agent within the exhaust pipe (32). Also a method for post-treatment of exhaust gases from vehicles with an exhaust post-treatment device (2) including a Peltier element (6).

Abstract: An arrangement for introducing a liquid medium into exhaust gases from a combustion engine: A mixing chamber (3) has exhaust gases flow through it. Its downstream end (5) has an endwall (7) of thermally conductive material as an end surface of the mixing chamber (3). An injector injects the liquid medium spray into the mixing chamber (3) or into exhaust gases led into the mixing chamber (3). An exhaust passage (13) adjacent to the mixing chamber (3) is intended for exhaust gases to flow through it and is delineated from the mixing chamber (3) by the endwall (7). Heat flanges (14) of thermally conductive material are situated on at least part of the side of said endwall (7) which faces towards the exhaust passage (13), extend into the exhaust passage (13), absorb heat from exhaust gases which flow through the exhaust passage and give off this heat to the endwall.

Abstract: An exhaust post-treatment device (2) for a vehicle (4) for reducing nitrogen oxides present in the exhaust gases (20) of the vehicle (4) by supply of liquid reducing agent (18) to the exhaust gases (20) in an exhaust pipe (32). The device (2) locally warms a surface (31) within the exhaust pipe (32) by a Peltier element (6) by using thermal energy from the exhaust gases (20) to vaporize liquid reducing agent (18) which reaches the surface (31), thereby avoiding the formation of deposits of reducing agent within the exhaust pipe (32). Also a method for post-treatment of exhaust gases from vehicles with an exhaust post-treatment device (2) including a Peltier element (6).