Configuration having a protected turbocharger in an exhaust gas recirculation line and motor vehicle having the configuration

Abstract

A configuration for treating exhaust gases of an internal combustion engine having a predetermined displacement volume, includes an exhaust gas recirculation line. Exhaust gas flowing through the exhaust gas recirculation line interacts with a turbocharger. A screening layer is provided in the exhaust gas recirculation line upstream of the turobcharger. The screening layer is larger than an average cross section of the exhaust gas recirculation line. A motor vehicle having at least one such configuration is also provided.

1 . A configuration for treating exhaust gases of an internal combustion engine having a predetermined displacement volume, the configuration comprising:
 an exhaust gas recirculation line having an average cross section;   a turbocharger, exhaust gas flowing through said exhaust gas recirculation line interacting with said turbocharger; and   a screening layer disposed in said exhaust gas recirculation line upstream of said turbocharger, said screening layer being larger than said average cross section of said exhaust gas recirculation line, said screening layer being formed with a plurality of plies being connected to one another, said plies being configured for different functions, such as a screening function, a retaining function, or a power supply function, a first ply of said plies having a screening function, and a second ply of said plies having a retaining function.   
     
     
         2 . The configuration according to  claim 1 , wherein said screening layer provides a screening area of at least 10 square centimeters per 1.0 liter of the displacement volume of the internal combustion engine. 
     
     
         3 . The configuration according to  claim 1 , wherein said screening layer is positioned obliquely relative to a direction of flow of the exhaust gas through said exhaust gas recirculation line. 
     
     
         4 . The configuration according to  claim 1 , wherein said exhaust gas recirculation line has a local widening in vicinity of said screening layer. 
     
     
         5 . The configuration according to  claim 1 , wherein said screening layer includes a woven fabric having wire filaments. 
     
     
         6 . The configuration according to  claim 5 , wherein said screening layer includes a majority of openings having a width of at least 0.05 millimeter. 
     
     
         7 . The configuration according to  claim 5 , wherein said wire filaments are integrally material-connected to one another. 
     
     
         8 . The configuration according to  claim 1 , wherein one of said plies has a wire construction with interspaces having a dimension of at least 5.0 millimeters. 
     
     
         9 . The configuration according to  claim 1 , which further comprises a ceramic wall filter, said screening layer being disposed downstream of said ceramic wall filter in a direction of flow of exhaust gas. 
     
     
         10 . The configuration according to  claim 1 , which further comprises a cooler disposed in said exhaust gas recirculation line, said screening layer being disposed between said cooler and said turbocharger. 
     
     
         11 . The configuration according to  claim 1 , wherein said exhaust gas recirculation line has a cross section, and said screening layer is formed as a surface spanning said cross section of said exhaust gas recirculation line. 
     
     
         12 . The configuration according to  claim 1 , wherein said screening layer provides a screening area, and said screening layer is a shaped structure having only a single inflow channel through which the exhaust gas is brought into contact with at least a majority of said screening area. 
     
     
         13 . The configuration according to  claim 1 , wherein said screening layer has a maximum pressure loss of not more than 20 mbar. 
     
     
         14 . The configuration according to  claim 1 , wherein said screening layer has a maximum pressure loss of not more than 10 mbar. 
     
     
         15 . The configuration according to  claim 1 , wherein said first ply is a woven fabric with wire filaments and said second ply is a wire construction with interspaces having a dimension of at least 5.0 mm, said second ply is disposed downstream of said first ply. 
     
     
         16 . A motor vehicle, comprising at least one configuration according to  claim 1 .