Exhaust Aftertreatment System

Abstract

An exhaust gas treatment system for the purpose of reducing the harmful substances present in the exhaust gas of combustion engines, particularly diesel engines, has a gas- and liquid-tight housing with at least one inlet and at least one outlet. Gas guide elements are arranged in the housing, and the housing encloses at least one chamber in which is contained a catalyst material and/or a particle filter material. The gas guide elements have spark-catching and/or spark-extinguishing elements.

1 . An exhaust gas treatment system for reducing harmful substances present in exhaust gas of diesel engines, comprising:
 a gas- and liquid-tight housing with at least one inlet and at least one outlet,   gas guide elements arranged in the housing, and   a catalyst material and/or a particle filter material contained in at least one chamber enclosed by the housing,   wherein the gas guide elements have spark-catching and/or spark-extinguishing elements.   
     
     
         2 . An exhaust gas treatment system according to  claim 1 , wherein the gas guide elements are formed by separation walls, which run in parallel, and which divide the exhaust gas into multiple partial flows. 
     
     
         3 . An exhaust gas treatment system according to  claim 2 , wherein the turbulence generating elements are passages or cavities included in the separation walls, baffles, impact points, or additional deflector plates arranged between the separation walls. 
     
     
         4 . An exhaust gas treatment system according to  claim 1 , wherein the catalyst material consists of a catalyst carrier material having a catalytic chemical surface or coating. 
     
     
         5 . An exhaust gas treatment system according to  claim 1 , wherein the at least one chamber contains a particle filter. 
     
     
         6 . An exhaust gas treatment system according to  claim 4 , wherein the at least one chamber is one of multiple chambers with catalysts that are connected one behind the other for the purpose of selective catalytic reduction. 
     
     
         7 . An exhaust gas treatment system according to  claim 5 , wherein the at least one chamber is one of multiple chambers with filters that are connected one behind the other. 
     
     
         8 . An exhaust gas treatment system according to  claim 2 , wherein the separation walls are made of sheet metal or metal foil, or ceramic elements, or combinations of these materials. 
     
     
         9 . An exhaust gas treatment system according to  claim 1 , further comprising at least one sound damper element that is additionally integrated into the system. 
     
     
         10 . An exhaust gas treatment system according to  claim 1 , wherein the at least one chamber contains a first region in which is contained an oxidative catalyst, and a second region in which is contained a particle filter. 
     
     
         11 . An exhaust gas treatment system according to  claim 5 , wherein, in the particle filter, a porosity of the walls through which the exhaust gas is guided is selected in such a manner that spark particles which are potentially present are filtered out. 
     
     
         12 . An exhaust gas treatment system according to  claim 4 , wherein the at least one chamber contains a particle filter. 
     
     
         13 . An exhaust gas treatment system according  claim 2 , wherein the catalyst material consists of a catalyst carrier material having a catalytic chemical surface or coating. 
     
     
         14 . An exhaust gas treatment system according  claim 3 , wherein the catalyst material consists of a catalyst carrier material having a catalytic chemical surface or coating. 
     
     
         15 . An exhaust gas treatment system according to  claim 2 , wherein the at least one chamber contains a particle filter. 
     
     
         16 . An exhaust gas treatment system according to  claim 3 , wherein the at least one chamber contains a particle filter. 
     
     
         17 . An exhaust gas treatment system according to  claim 2 , wherein the at least one chamber contains a first region in which is contained an oxidative catalyst, and a second region in which is contained a particle filter. 
     
     
         18 . An exhaust gas treatment system according to  claim 3 , wherein the at least one chamber contains a first region in which is contained an oxidative catalyst, and a second region in which is contained a particle filter. 
     
     
         19 . An exhaust gas treatment system according to  claim 4 , wherein the at least one chamber contains a first region in which is contained an oxidative catalyst, and a second region in which is contained a particle filter. 
     
     
         20 . An exhaust gas treatment system according to  claim 5 , wherein the at least one chamber contains a first region in which is contained an oxidative catalyst, and a second region in which is contained a particle filter.