Apparatus for Mixing a Liquid Medium Into a Gaseous Medium

Abstract

An apparatus for mixing liquid medium into a gaseous medium flowing through an exhaust pipe from an internal combustion engine is provided. The liquid medium is supplied to the exhaust pipe with varied mass flow via an injector nozzle directed into the exhaust pipe. The exhaust pipe has a mixer placed downstream of the injector nozzle and a flow path disposed parallel with the mixer and extending through a perforated surface.

1 . An apparatus for mixing liquid medium into a gaseous medium flowing through an exhaust pipe from an internal combustion engine, the apparatus comprising the exhaust pipe and an injector nozzle, the liquid medium being supplied to the exhaust pipe with varied mass flow via the injector nozzle directed into the exhaust pipe, wherein the exhaust pipe has a mixer placed downstream of the injector nozzle and a flow path comprising a widening of the exhaust pipe and disposed parallel with the mixer and extending through a perforated surface, wherein the perforated surface comprises a perforated portion of a wall of the exhaust pipe. 
   
   
       2 . The apparatus as claimed in  claim 1 , wherein perforations of the perforated part upstream of the mixer have an area which is between about 0.5-3.0 times a cross-sectional area of the exhaust pipe. 
   
   
       3 . The apparatus as claimed in  claim 2 , wherein the mixer comprises a plate in the exhaust pipe. 
   
   
       4 . The apparatus as claimed in  claim 1 , wherein the mixer comprises a plate in the exhaust pipe.