Particle trap for an exhaust gas recirculation line and automobile having a particle trap

Abstract

A particle trap disposed between an exhaust gas line and an exhaust gas recirculation line includes at least one partially permeable hollow body separating the exhaust gas recirculation line from the exhaust gas line. The at least one partially permeable hollow body has a wall defining a primary shape with an inner space having at least one open side. The wall is gas-permeable and has a secondary structure with elevations and depressions. An automobile having a particle trap is also provided.

1 . In an exhaust gas treatment device having an exhaust gas line and an exhaust gas recirculation line, a particle trap disposed between the exhaust gas line and the exhaust gas recirculation line, the particle trap comprising:
 at least one partially permeable hollow body separating the exhaust gas recirculation line from the exhaust gas line;   said at least one partially permeable hollow body including a wall defining a primary shape having an inner space with at least one open side; and   said wall being gas-permeable and having a secondary structure with elevations and depressions.   
     
     
         2 . The particle trap according to  claim 1 , wherein the exhaust gas line has a first central cross section and a first enlarged cross section, and said at least one partially permeable hollow body is disposed in the first enlarged cross section. 
     
     
         3 . The particle trap according to  claim 2 , which further comprises push-in ring connections attaching said at least one partially permeable hollow body to the exhaust gas line in vicinity of the first enlarged cross section. 
     
     
         4 . The particle trap according to  claim 1 , wherein the exhaust gas recirculation line has a second central cross section and a second enlarged cross section, and said at least one partially permeable hollow body is disposed in the second enlarged cross section. 
     
     
         5 . The particle trap according to  claim 1 , which further comprises a cap closing off an open side of said at least one partially permeable hollow body. 
     
     
         6 . The particle trap according to  claim 1 , wherein said elevations and said depressions of said secondary structure are disposed parallel to a first main direction of the exhaust gas line or to a second main direction of the exhaust gas recirculation line. 
     
     
         7 . The particle trap according to  claim 1 , wherein said partially permeable hollow body is formed of at least one layer having said elevations and depressions, and said at least one layer forms a region overlapping itself and in which said elevations and said depressions engage in one another in a form-locking manner. 
     
     
         8 . The particle trap according to  claim 1 , which further comprises at least one support layer having a shape corresponding to said secondary structure of said at least one partially permeable hollow body. 
     
     
         9 . The particle trap according to  claim 1 , wherein said wall has meshes with a size of up to 0.3 mm. 
     
     
         10 . An automobile, comprising:
 an internal combustion engine;   an exhaust system receiving exhaust gas from said internal combustion engine and having at least one particle trap according to  claim 1 ; and   an exhaust gas recirculation line defining a flow direction leading to said internal combustion engine;   said particle trap having a location causing said flow direction in said exhaust gas recirculation line directly downstream of said particle trap to run counter to the force of gravity.   
     
     
         11 . An automobile, comprising:
 an internal combustion engine;   an exhaust system receiving exhaust gas from said internal combustion engine and having at least one particle trap according to  claim 1  and at least one ceramic filter; and   an exhaust gas line defining a flow direction leading away from said internal combustion engine;   said at least one ceramic filter disposed upstream of said particle trap in said flow direction.