Exhaust system for diesel vehicles

Abstract

An exhaust system for diesel vehicles is described, which includes at least one metering device for introducing and metering a pollutant-reducing medium into an exhaust gas flowing through a flow pipe of an exhaust tract of an internal combustion engine, in particular for the purpose of introducing a reduction agent and/or a reduction agent precursor, for example urea and/or an aqueous urea solution, the exhaust tract having at least one flexible flange connection.

What is claimed is: 
     
         1 . An exhaust system for diesel vehicles comprising:
 an exhaust tract of an internal combustion engine including a flow pipe; and   at least one metering device for introducing and metering a pollutant-reducing medium into an exhaust gas flowing through the flow pipe of the exhaust tract, the exhaust tract having at least one flexible flange connection.   
     
     
         2 . The exhaust system for diesel vehicles as recited in  claim 1  further comprising a SCR catalytic converter, the flexible flange connection being situated upstream from the SCR catalytic converter. 
     
     
         3 . The exhaust system for diesel vehicles as recited in  claim 1  wherein the flow pipe is a mixing line for the pollutant-reducing medium and the exhaust gas, the flexible flange connection being situated in the area of the mixing line and in a flow direction of the exhaust gas. 
     
     
         4 . The exhaust system for diesel vehicles as recited in  claim 1  wherein the flexible flange connection has at least two flanges. 
     
     
         5 . The exhaust system for diesel vehicles as recited in  claim 1  wherein the flexible flange connection has at least one loose flange. 
     
     
         6 . The exhaust system for diesel vehicles as recited in  claim 1  wherein the flexible flange connection has at least one flanged pipe at a flow-side outlet side. 
     
     
         7 . The exhaust system for diesel vehicles as recited in  claim 1  wherein the flexible flange connection includes a flange and at least one pipe attached to the flange. 
     
     
         8 . The exhaust system for diesel vehicles as recited  claim 1  wherein the at least one metering device introduces at least one of a reduction agent and a reduction agent precursor. 
     
     
         9 . The exhaust system for diesel vehicles as recited  claim 8  wherein the at least one metering device introduces at least one of urea and an aqueous urea solution.