Assembly for cooling an exhaust gas stream

Abstract

An assembly for cooling an exhaust gas stream includes an outlet nozzle exposed to the exhaust gas stream. The outlet nozzle projects into an open end of an adjacent exhaust gas pipe so that a reduced pressure relative to the surrounding environment is produced in a suction region between the outlet nozzle and the exhaust gas pipe by flow of exhaust gas. Adjusting members vary the flow cross section of the outlet nozzle.

1 . A assembly for cooling an exhaust gas stream, having an outlet nozzle exposed to the exhaust gas stream, the outlet nozzle projecting into an open end of an adjacent exhaust gas pipe so that a reduced pressure relative to the surrounding environment is produced in a suction region between the outlet nozzle and the exhaust gas pipe as a result of exhaust gas flow, characterized by:
 the outlet nozzle comprises adjusting members for varying a flow cross section of the outlet nozzle.   
     
     
         2 . The assembly according of  claim 1 , wherein:
 the adjusting members vary the flow cross section as a function of an exhaust gas temperature.   
     
     
         3 . The assembly of  claim 1 , wherein:
 the outlet nozzle comprises a plurality of flexible fins for varying the flow cross section.   
     
     
         4 . The assembly of  claim 3 , wherein:
 the fins comprise bimetallic elements, which assume a curvature which reduces the flow cross section of the outlet nozzle as the exhaust gas temperature increases.   
     
     
         5 . The assembly of  claim 3 , wherein:
 the fins rest against an open end of the exhaust gas pipe when the exhaust gas stream temperature is below a predetermined threshold value.   
     
     
         6 . The assembly of  claim 3 , wherein:
 the open end of the exhaust gas pipe includes a limiting member; and   the fins rest on the limiting member.   
     
     
         7 . The assembly of  claim 1 , wherein:
 a portion of the exhaust gas pipe is surrounded by a touch guard.