Exhaust system component

Patent metadata

Field	Value
Publication number	US-9410471-B2
Application number	US-201414268328-A
Country	US
Kind code	B2
Filing date	May 2, 2014
Priority date	May 3, 2013
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

An exhaust system component ( 1 ), for an exhaust system of an internal combustion engine, includes a metallic first part ( 3 ), which is inserted into a metallic second part ( 2 ), such that an inner jacket section ( 7 ) of the first part ( 3 ) is arranged coaxially in an outer jacket section ( 5 ) of the second part ( 2 ), as well as at least one weld joint ( 10 ), which permanently connects the outer jacket section ( 5 ) to the inner jacket section ( 7 ). To simplify the assembly of the parts ( 2, 3 ) with one another, a plurality of centering contours ( 11, 12 ) are formed integrally on the outer jacket section ( 5 ), projecting inwardly, and/or are formed integrally on the outer jacket section ( 7 ), projecting outwardly, and are located at spaced locations from one another in the circumferential direction ( 6 ). The centering contours center the inner jacket section ( 7 ) in the outer jacket section ( 5 ).

First claim

What is claimed is:

1. An exhaust system component for an exhaust system of an internal combustion engine, the exhaust system component comprising:
a metallic first part with an annular inner section;
a metallic second part with an annular outer section, the metallic first part being inserted into the metallic second part such that the inner section of the first part is arranged coaxially in the outer section of the second part;
a plurality of centering contours formed integrally on the outer section, projecting inwardly toward the inner section, or formed integrally on the inner section, projecting outwardly toward the outer section or both formed integrally on the outer section, projecting inwardly toward the inner section, and formed integrally on the inner section, projecting outwardly toward the outer section, the centering contours being located at spaced locations from one another in a circumferential direction for centering the inner section in the outer section; and
a weld joint permanently connecting the outer section to the inner section, wherein:
the second part is formed by an exhaust gas treatment device housing panel having a passage opening;
the annular outer section is formed by a conduit of the housing panel, the conduit enclosing the passage opening, the conduit being formed integrally with the housing panel and projecting from a remainder of the housing panel;
the first part is formed by an attached part, which passes through the housing panel in the passage opening;
the inner section is formed by a section of the attached part, which said inner section is located in the passage opening; and
the centering contours center the annular inner section in the conduit.

2. An exhaust system component in accordance with claim 1 , wherein the housing panel is an end panel of a housing of an exhaust gas treatment device, wherein the attached part is an inlet pipe or an outlet pipe of the exhaust gas treatment device.

3. An exhaust system component in accordance with claim 1 , wherein the housing panel is an intermediate panel of a housing of an exhaust gas treatment device, which is arranged between two end panels of the housing.

4. An exhaust system component in accordance with claim 3 , wherein the attached part is a jacket tube for receiving at least one exhaust gas treatment element or a mixing tube for forming a mixing section or a static mixer for mixing an exhaust gas flow with a reducing agent.

5. An exhaust system component in accordance with claim 1 , wherein the centering contours comprise an outer centering contour supported on an outer contour of the inner section.

6. An exhaust system component in accordance with claim 1 , wherein the centering contours comprise an inner centering contour supported on an inner contour of the outer section.

7. An exhaust system component in accordance with claim 1 , wherein a radial clearance, which is bridged over by the centering contours, is provided radially between an outer contour of the inner section and an inner contour of the outer section.

8. An exhaust system component in accordance with claim 1 , wherein at least one of the centering contours is formed by a local elastic deformation of the outer section or of the inner section.

9. An exhaust system component in accordance with claim 1 , wherein at least one of the centering contours is formed by a cam or by a bead.

10. An exhaust system component in accordance with claim 9 , wherein the bead is oriented in an axial direction of the annular inner jacket section and the annular outer jacket section.

11. An exhaust system component in accordance with claim 1 , wherein:
the weld joint comprises a circumferential weld seam closed in the circumferential direction; and
the weld seam is located at an axial spaced location from the centering contours.

12. An exhaust system component in accordance with claim 1 , further comprising at least another weld joint to provide a plurality of weld joints comprising weld spots located at spaced locations from one another in the circumferential direction.

13. An exhaust system component in accordance with claim 12 , wherein the each of the respective centering contours is arranged at a spaced location from the weld joints in at least one of the circumferential direction and in an axial direction.

14. An exhaust system component for an exhaust system of an internal combustion engine, the exhaust system component comprising:
a metallic component part with a component part annular outer section defining a passage opening;
a metallic attached part with an attached part annular inner section, the metallic attached part being inserted into the opening of the metallic component part such that the component inner section is arranged in the component outer section, at least one of the component outer section and the component inner section comprising integral centering contours, at least one of projecting from the component outer section inwardly toward the component inner section and projecting from the component inner section outwardly toward the outer section, the centering contours being located at spaced locations from one another in a circumferential direction for centering the component inner section in the component outer section; and
a weld joint permanently connecting the component outer section to the component inner section, wherein:
the metallic component part is a panel of a housing of an exhaust gas treatment device;
the component outer section is formed by a conduit of the panel;
the conduit encloses the passage opening;
the conduit is formed integrally with the panel and projects from a remainder of the panel;
the metallic attached part passes through the panel in the passage opening; and
the metallic attached part is an inlet pipe or an outlet pipe of the exhaust gas treatment device.

15. An exhaust system component in accordance with claim 14 , wherein:
the metallic attached part further comprises a static mixer;
the metallic component part is formed by an exhaust gas-carrying exhaust gas pipe, into which the mixer is inserted;
the component inner section encloses a mixing structure of the static mixer;
the component outer section is formed by a pipe section of the exhaust gas pipe, in which the component inner section is located; and
the centering contours center the component inner section in the exhaust gas pipe and are formed one of integrally on the exhaust gas pipe, projecting inwardly, and integrally on the component inner section, projecting outwardly.

16. An exhaust system component in accordance with claim 14 , wherein at least one of the centering contours is formed by a cam or by a bead extending in an axial direction of the passage opening.

17. An exhaust system component in accordance with claim 14 , wherein:
the weld joint comprises a circumferential weld seam closed in a circumferential direction.

Assignees

• Eberspächer Exhaust Tech Gmbh & Co Kg
• Eberspächer Exhuast Tech Gmbh & Co Kg

Inventors

• Bäumchen Carsten

Classifications

• F01N3/0211

  Arrangements for mounting filtering elements in housing, e.g. with means for compensating thermal expansion or vibration · CPC title

• F01N13/18

  Construction facilitating manufacture, assembly, or disassembly · CPC title

• F01N2470/24

  Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled · CPC title

• F01N13/1838

  characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles · CPC title

• Y02T10/20

  Cross-Sectional Technologies · mapped topic