Device For Cooling An Exhaust Gas Stream Emerging From A Soot Particle Filter

Abstract

Device for cooling an exhaust gas stream emerging from a soot particle filter, having an outlet connector provided on the soot particle filter for conveying out the exhaust gas stream, the outlet connector comprising a mouth region tapering in the direction of the exhaust gas stream, which region projects into an open end of an adjacent exhaust gas pipe in such a way that a reduced pressure relative to the surrounding environment may be produced in a suction region between the outlet connector and the exhaust gas pipe on passage of the exhaust gas stream.

1 . A device for cooling an exhaust gas stream emerging from a soot particle filter, wherein an outlet connector is provided on the soot particle filter for conveying out the exhaust gas stream, the outlet connector comprising a mouth region tapering in the direction of the exhaust gas stream, the region projects into an open end of an adjacent exhaust gas pipe in such a way that a reduced pressure relative to the surrounding environment may be produced in a suction region between the outlet connector and the exhaust gas pipe on passage of the exhaust gas stream. 
     
     
         2 . The device according to  claim 1 , wherein the outlet connector is connected detachably with a fastening flange of a filter housing surrounded by the soot particle filter. 
     
     
         3 . The device according to  claim 1 , wherein the detachable connection between the outlet connector and the fastening flange of the filter housing may be produced by means of a removable spring clip. 
     
     
         4 . The device according  claim 1 , wherein the outlet connector is a fixed component of the filter housing surrounded by the soot particle filter. 
     
     
         5 . The device according to  claim 1 , wherein the suction region takes the form of an annular gap extending radially between the outlet connector and the exhaust gas pipe. 
     
     
         6 . The device according to  claim 5 , wherein the ratio between an outer radius and an inner radius of the annular gap has a value in the range from 1.90 to 2.10. 
     
     
         7 . The device according to  claim 1 , wherein the mouth region of the outlet connector extends throughout over its entire circumference at a distance from the open end of the exhaust gas pipe. 
     
     
         8 . The device according to  claim 1 , wherein the suction region is surrounded by a filter element, in particular by a perforated mesh. 
     
     
         9 . The device according to  claim 8 , wherein the filter element is arranged at the open end of the exhaust gas pipe and extends in the direction of the outlet connector. 
     
     
         10 . The device according to  claim 8 , wherein the filter element is tapered in the direction of the outlet connector. 
     
     
         11 . The device according to  claim 8 , wherein the filter element tapers in the direction of the outlet connector. 
     
     
         12 . The device according to  claim 1 , wherein the exhaust gas pipe is surrounded at least in places by a touch guard. 
     
     
         13 . A motor vehicle having a device for cooling an exhaust gas stream emerging from a soot particle filter, wherein an outlet connector is provided on the soot particle filter for conveying out the exhaust gas stream, the outlet connector comprising a mouth region tapering in the direction of the exhaust gas stream, the region projects into an open end of an adjacent exhaust gas pipe in such a way that a reduced pressure relative to the surrounding environment may be produced in a suction region between the outlet connector and the exhaust gas pipe on passage of the exhaust gas stream. 
     
     
         14 . The motor vehicle of  claim 13 , wherein the device is positioned in an engine compartment. 
     
     
         15 . The motor vehicle of  claim 13 , wherein the motor vehicle is an agricultural utility vehicle.