Exhaust system for a vehicle

Abstract

An exhaust system, in particular for a vehicle with a diesel engine, has a first insert through which exhaust gas flows, a second insert through which exhaust gas flows and which is arranged downstream of the first insert in the flow direction, and an injection device arranged between the first and second inserts for injecting a fluid. A swirling element is provided in the flow path of the exhaust gas downstream of the first insert in the flow direction.

1 . An exhaust system, in particular for a vehicle with a diesel engine, comprising:
 a first insert through which exhaust gas flows;   a second insert through which exhaust gas flows and which is arranged downstream of the first insert in a flow direction;   an injection device arranged between the first and the second inserts for injecting a fluid; and   a swirling element arranged downstream of the first insert in a flow path of the exhaust gas.   
     
     
         2 . The exhaust system according to  claim 1 , wherein the swirling element includes recesses through which the exhaust gas flows. 
     
     
         3 . The exhaust system according to  claim 1 , wherein the swirling element extends across an entire cross-section of an exhaust pipe. 
     
     
         4 . The exhaust system according to  claim 1 , wherein the swirling element produces swirls over an entire cross-section of an exhaust pipe. 
     
     
         5 . The exhaust system according to  claim 1 , wherein the swirling element includes deflector elements which are inclined in relation to the flow direction. 
     
     
         6 . The exhaust system according to  claim 5 , wherein the deflector elements include at least two portions which are inclined at different angles of inclination in relation to the flow direction. 
     
     
         7 . The exhaust system according to  claim 6 , wherein the angle of inclination of the portions increases in the flow direction. 
     
     
         8 . The exhaust system according to  claim 5 , wherein the deflector elements are inclined at an angle of at least 30° in relation to the flow direction. 
     
     
         9 . The exhaust system according to  claim 5 , wherein the deflector elements extend in a radial direction and are evenly distributed over an entire cross-section of an exhaust pipe. 
     
     
         10 . The exhaust system according to  claim 9 , wherein the deflector elements are configured in the shape of turbine blades. 
     
     
         11 . The exhaust system according to  claim 9 , wherein radially arranged deflector elements enclose an opening. 
     
     
         12 . The exhaust system according to  claim 11 , including a baffle plate disposed perpendicularly to the flow direction and in front of the opening. 
     
     
         13 . The exhaust system according to  claim 5 , wherein the deflector elements are arranged parallel to each other. 
     
     
         14 . The exhaust system according to  claim 1 , wherein a cross-sectional area of an exhaust pipe through which exhaust gas flows, tapers in a portion located directly upstream of the swirling element in the flow direction and/or widens in a portion located directly downstream of the swirling element in the flow direction. 
     
     
         15 . The exhaust system according to  claim 1 , wherein the first and second inserts are particulate filters and/or catalytic converters. 
     
     
         16 . The exhaust system according to  claim 1 , wherein the first insert is a pre-filter and the second insert includes a diesel oxidation catalytic converter and/or particulate filter. 
     
     
         17 . The exhaust system according to  claim 1 , wherein the injection device is part of a regeneration device. 
     
     
         18 . The exhaust system according to  claim 17 , wherein the injection device includes a fuel vaporizer. 
     
     
         19 . The exhaust system according to  claim 1 , wherein the injection device is arranged upstream or downstream of the swirling element. 
     
     
         20 . The exhaust system according to  claim 1 , wherein the injection device is integrated in the swirling element. 
     
     
         21 . The exhaust system according to  claim 1 , wherein the first insert and the second insert along with the swirling element are arranged in a shared housing. 
     
     
         22 . The exhaust system according to  claim 1 , wherein the swirling element is a static mixer. 
     
     
         23 . The exhaust system according to  claim 1 , wherein the swirling element is a prefabricated component that is inserted in an exhaust pipe.