Arrangement for cooling the exhaust gas of a motor vehicle

Abstract

A device may include a housing; a heat transfer region located in the housing and comprising a plurality of heat transfer tubes, the heat transfer tubes being distributed through an entirety of a cross-sectional area of at least a portion of the housing; a bypass duct that branches off from the housing at a location upstream of the heat transfer region, wherein an opening into the bypass duct is located in an outer wall of the housing; and an actuating element comprising a flap and a pivot shaft, the flap being pivotable about the pivot shaft.

1 . A device comprising:
 a housing;   a heat transfer region located in the housing and comprising a plurality of heat transfer tubes, the heat transfer tubes being distributed through an entirety of a cross-sectional area of at least a portion of the housing;   a bypass duct that branches off from the housing at a location upstream of the heat transfer region, wherein an opening into the bypass duct is located in an outer wall of the housing; and   an actuating element comprising a flap and a pivot shaft, the flap being pivotable about the pivot shaft,   wherein the pivot shaft is arranged adjacent to the outer wall of the housing in a location upsteam of the heat transfer region,   wherein the flap is selectively pivotable between (i) a first position at which the flap is substantially perpendicular to a longitudinal axis of the housing so as to inhibit a flow of exhaust gas from entering the heat transfer region, and (ii) a second position at which the flap is substantially parallel to the longitudinal axis of the housing so as to inhibit the flow of exhaust gas from entering the bypass duct.   
     
     
         2 . The device as claimed in  claim 1 , wherein the flap is attached to the shaft by welding, hot-soldering, or compression. 
     
     
         3 . The device as claimed in  claim 1 , wherein the housing contains an exhaust-gas inlet region and an exhaust-gas outlet region. 
     
     
         4 . The device as claimed in  claim 1 , wherein the housing has openings in which the pivot shaft is mounted, wherein the openings are closed after the shaft is mounted in the openings. 
     
     
         5 . The device as claimed in  claim 1 , wherein the heat transfer region and at least a portion of the bypass duct run parallel to one another. 
     
     
         6 . The device as claimed in  claim 1 , further comprising a base plate being arranged in the housing, wherein the base plate constitutes a stop for the heat transfer tubes. 
     
     
         7 . The device as claimed in  claim 6 , wherein the pivot shaft is arranged adjacent to the base plate. 
     
     
         8 . The device as claimed in  claim 1 , further comprising a base plate being arranged in the housing, wherein the heat transfer tubes are attached to the base plate. 
     
     
         9 . The device as claimed in  claim 8 , wherein the shaft is arranged adjacent to the base plate.