Exhaust system

Abstract

An exhaust system for a motor vehicle includes a housing having an inflow funnel defined by an expanding cross sectional area. Received in the housing is an exhaust-gas treatment device which includes a tubular guide element arranged in the inflow funnel and having a curvature with an outer side formed with at least one embossment. The embossment causes a deflection of the exhaust-gas flow and thereby increases a contact time of the exhaust-gas flow with an insert of the exhaust-gas treatment device.

1 . An exhaust system for a motor vehicle; comprising:
 a housing having an inflow funnel defined by an expanding cross sectional area; and   an exhaust-gas treatment device received in the housing and including a tubular guide element arranged in the inflow funnel and having a curvature with an outer side formed with at least one embossment.   
     
     
         2 . The exhaust system of  claim 1 , wherein the embossment is arranged in a direction transversely to a flow direction of exhaust gas. 
     
     
         3 . The exhaust system of  claim 1 , wherein the embossment is arranged on the guide element to point inwardly. 
     
     
         4 . The exhaust system of  claim 1 , wherein the embossment extends substantially across an entire cross sectional width of the guide element. 
     
     
         5 . The exhaust system of  claim 1 , wherein the outer side of the guide element is formed with more than one of said embossment arranged successively in flow direction of exhaust gas. 
     
     
         6 . The exhaust system of  claim 1 , wherein the guide element has a cross sectional area which is configured to change from a round shape to a noncircular shape. 
     
     
         7 . The exhaust system of  claim 1 , wherein the guide element has a cross sectional area which increases in flow direction of exhaust gas. 
     
     
         8 . The exhaust system of  claim 1 , further comprising an exhaust pipe engaging an inlet opening of the guide element. 
     
     
         9 . The exhaust system of  claim 1 , wherein the guide element is secured in an entry region of the inflow funnel. 
     
     
         10 . The exhaust system of  claim 1 , wherein the exhaust-gas treatment device has an insert, said insert and said inflow funnel jointly defining an interior space, said guide element having an outlet opening positioned within the interior space at a distance to the insert. 
     
     
         11 . The exhaust system of  claim 1 , wherein the exhaust-gas treatment device has an insert, said insert and said inflow funnel jointly defining an interior space, said guide element having an outlet opening extending in a plane at an angle to a plane of an attachment zone of the exhaust-gas treatment device with the inflow funnel. 
     
     
         12 . The exhaust system of  claim 11 , wherein the angle ranges between 0° and 45°. 
     
     
         13 . The exhaust system of  claim 11 , wherein the angle ranges between 0° and 30°. 
     
     
         14 . The exhaust system of  claim 11 , wherein the angle ranges between 0° and 20°. 
     
     
         15 . The exhaust system of  claim 1 , wherein the guide element and the inflow funnel define a gap there between, with a distance between the inflow funnel and the guide element on the outer side of the curvature increasing in flow direction of exhaust gas.