Exhaust Gas Aftertreatment System

Abstract

An exhaust gas after treatment system for treating exhaust gases from an internal combustion engine is provided. The system includes a soot catalytic converter and an SCR catalytic converter, which reduces NOx-emissions by means of a reagent delivered via an injector located upstream of the SCR catalytic converter. According to the invention the soot catalytic converter is located between the injector and the SCR-catalytic converter.

1 . An exhaust gas aftertreatment system for treating exhaust gases from an internal combustion engine, comprising a soot catalytic converter and a SCR-catalytic converter, which reduces NOx-emissions by means of a reagent delivered via an injector located upstream of the SCR catalytic converter, wherein the soot catalytic converter is located between the injector and the SCR catalytic converter. 
   
   
       2 . The system as claimed in  claim 1 , wherein an oxidation catalytic converter is located downstream of the SCR-catalytic converter. 
   
   
       3 . The system as claimed in  claim 2 , wherein the soot catalytic converter, the SCR catalytic converter and the oxidation catalytic converter are arranged in series inside a common casing. 
   
   
       4 . The system as claimed in  claim 1 , wherein the casing is divided by internal dividing walls to form distributing spaces at ends of the casing and an acoustically active space situated between the distributing spaces. 
   
   
       5 . The system as claimed in  claim 1 , wherein the injector for delivering reagent is located alongside a connection for an admission line for exhaust gases from the internal combustion engine. 
   
   
       6 . The system as claimed in  claim 5 , wherein an oxidation catalytic converter is located in the admission line upstream of the injector.