Exhaust gas treatment device

Patent metadata

Field	Value
Publication number	US-9334785-B2
Application number	US-201213721976-A
Country	US
Kind code	B2
Filing date	Dec 20, 2012
Priority date	Dec 27, 2011
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

The present invention relates to an exhaust gas treatment device ( 4 ) and an exhaust system ( 1 ) having such an exhaust gas treatment device ( 4 ), wherein the exhaust system ( 1 ) has at least one exhaust-gas-conducting exhaust gas feed line ( 2, 3 ), which is attached to an inlet region ( 16 ) of the exhaust gas treatment device ( 4 ). Improved mixing of the exhaust gas and a space-saving configuration result if the exhaust gas treatment device ( 4 ) has at least one inlet ( 12, 13 ) which is open towards the inlet region ( 16 ) and if a mixing element ( 15 ) is provided, which connects the inlet region ( 16 ) to a through-flow region ( 17 ) by means of input openings ( 22, 23 ), wherein at least one first input opening ( 22 ) faces a first side ( 18 ) of the inlet region ( 16 ) and at least one second input opening ( 23 ) faces a second side ( 19 ) of the inlet region ( 16 ).

First claim

The invention claimed is:

1. An exhaust gas treatment device for an exhaust system of an internal combustion engine of a motor vehicle, the device comprising:
a housing which encloses an exhaust gas treatment chamber;
a mixing element, which divides the exhaust gas treatment chamber into an upstream-side inlet region and a downstream-side through-flow region by extending completely across the exhaust gas treatment chamber;
wherein the mixing element has at least one first input opening which connects the inlet region fluidically to the through-flow region and faces a first side of the inlet region;
wherein the mixing element has at least one second input opening which connects the inlet region fluidically to the through-flow region and faces a second side of the inlet region;
wherein the mixing element has at least one depression on its side facing the inlet region, the depression forming a flow channel which leads to one of the at least one first or at least one second input openings;
wherein the mixing element has at least one perforation region including a plurality of perforations, wherein the perforation region is located outside of the at least one depression;
wherein the housing has on the inlet region a first inlet for attaching a first exhaust gas feed line, the first inlet is open towards the inlet region and is arranged on the first side of the inlet region; and
wherein the housing has on the inlet region a second inlet for attaching a second exhaust gas feed line, the second inlet is open towards the inlet region and is arranged on the second side of the inlet region.

2. The exhaust gas treatment device according to claim 1 wherein the first side and the second side of the inlet region are spaced apart from each other transversely to the longitudinal direction of the housing and are opposite each other diametrically.

3. The exhaust gas treatment device according to claim 1 , wherein the first side of the inlet region is opposite the second side of the inlet region in a spacing direction and that the at least one first input opening and the at least one second input opening are arranged offset to each other transversely to the spacing direction.

4. The exhaust gas treatment device according to claim 1 , wherein the first and second input openings are arranged in the center of the mixing element.

5. The exhaust gas treatment device according to claim 1 , wherein the flow channel is located on one of the first or second sides of the inlet region and one of the at least one perforation regions is arranged on the other of the first or second sides and is aligned with the flow channel substantially along a line which runs parallel to a spacing direction.

6. The exhaust gas treatment device according to claim 1 , wherein a normal direction of at least one of the inlets runs in an inclined manner to a longitudinal direction of the housing.

7. The exhaust gas treatment device according to claim 1 , wherein the mixing element is substantially convex towards the inlet region.

8. The exhaust gas treatment device according to claim 1 , wherein the housing has in the inlet region an end wall which is opposite the mixing element and is convex towards the mixing element.

9. The exhaust gas treatment device according to claim 1 , wherein at least one exhaust gas treatment element, in the form of a catalyst and/or a particle filter, is arranged in the through-flow region.

10. The exhaust gas treatment device according to claim 1 , wherein the first side and/or the second side is/are not arranged frontally with respect to the inlet region.

11. The exhaust gas treatment device according to claim 1 , wherein an exhaust gas discharge line is attached to a downstream-side outlet of the through-flow region.

12. The exhaust gas treatment device according to claim 11 , wherein the exhaust gas discharge line has a measurement device for measuring a nitrogen oxide content, which is arranged in an opening in the exhaust gas discharge line.

13. The exhaust gas treatment device according to claim 1 , wherein the flow channel runs substantially parallel to a spacing direction.

Assignees

• Marquardt-Stammberger Michael
• Hanitzsch Robert
• Boriga Remus
• Braun Joachim
• Eberspaecher Exhaust Tech Gmbh

Inventors

• Marquardt-Stammberger Michael
• Hanitzsch Robert
• Boriga Remus
• Braun Joachim

Classifications

• F01N2240/20

  a flow director or deflector · CPC title

• F01N2470/18

  the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus · CPC title

• F01N3/2892 Primary

  Exhaust flow directors or the like, e.g. upstream of catalytic device · CPC title

• F01N2490/08

  Two or more expansion chambers in series separated by apertured walls only · CPC title

• F01N13/08 Primary

  Other arrangements or adaptations of exhaust conduits {(pipes, joints or supports therefor in general F16L; collecting or removing exhaust gases of vehicle engines in workshops B08B15/00, on highways E01C1/005)} · CPC title