Exhaust-gas flap device

Patent metadata

Field	Value
Publication number	US-2022010738-A1
Application number	US-202117374382-A
Country	US
Kind code	A1
Filing date	Jul 13, 2021
Priority date	Jul 13, 2020
Publication date	Jan 13, 2022
Grant date	—

Abstract

An exhaust-gas flap device, including for the exhaust-gas flow of an internal combustion engine, has a flap pipe and a flap plate that is supported in the interior of the flap pipe on a pivot shaft. The pivot shaft is rotatable about a pivot axis (A). The pivot shaft has first and second axial end regions and is supported rotatably on the flap pipe by respective first and second bearing assemblies. The pivot shaft is configured, in the first axial end region, for coupling to a drive element of a pivot drive. The pivot shaft is, in at least one of the axial end regions, in contact with vibration-damping material that is supported relative to the flap pipe.

First claim

What is claimed is:

1 . An exhaust-gas flap device, including for the exhaust-gas flow of a combustion engine, the exhaust-gas flap device comprising:
a flap pipe defining an interior; a pivot shaft rotatably mounted so as to pivot about a pivot axis (A); a flap plate supported in said interior on said pivot shaft; said pivot shaft having first and second end regions; first and second bearing assemblies for rotatably supporting said pivot shaft at corresponding ones of said first and second end regions on said flap pipe; a pivot drive for said pivot shaft and said pivot drive including a drive element; said pivot shaft being configured at said first end region for coupling to said drive element; and, vibration-damping material supported with respect to said flap pipe so as to cause at least one of said first and second end regions to be in contact with said vibration-damping material.

2 . The exhaust-gas flap device of claim 1 , wherein the vibration-damping material comprises porous material.

3 . The exhaust-gas flap device of claim 2 , wherein the vibration-damping material comprises open-pore material.

4 . The exhaust-gas flap device of claim 1 , wherein the vibration-damping material comprises wire material.

5 . The exhaust-gas flap device of claim 4 , wherein the wire material comprises weft-knitted wire, warp-knitted wire, braided wire, woven wire or tangled wire material.

6 . The exhaust-gas flap device of claim 1 , wherein said pivot shaft is in contact with said vibration-damping material at said second end region.

7 . The exhaust-gas flap device of claim 6 , wherein said second bearing assembly comprises a second bearing bushing having a base and being provided on said flap pipe and a second pivot bearing arranged in said second bearing bushing and bearing said pivot shaft radially with respect to said pivot axis (A); and, said vibration-damping material is arranged axially between said pivot shaft and said base of said second bearing bushing.

8 . The exhaust-gas flap device of claim 7 , wherein said pivot shaft has an axial end face delimiting said second end region; said vibration-damping material defines a contact region in contact with said axial end face; and, said vibration-damping material has an attachment region whereat said vibration-damping material is attached to said base.

9 . The exhaust-gas flap device of claim 8 , wherein said vibration-damping material contact region has a pivot shaft engagement region projecting axially in a direction toward said axial end face of said pivot shaft; and, said axial end face of said pivot shaft has a receiving recess formed therein receiving said pivot shaft engagement region therein.

10 . The exhaust-gas flap device of claim 9 , wherein said pivot shaft engagement region is configured to have at least regionally a convexly domed or conical or frustoconical form; and, said receiving recess is of a complementary shape with respect to said pivot shaft engagement region.

11 . The exhaust-gas flap device of claim 10 , wherein the pivot shaft engagement region has a spherical-cap-shaped form.

12 . The exhaust-gas flap device of claim 8 , wherein said contact region of said vibration-damping material is configured to define a pivot shaft receiving recess; and, said axial end face of said pivot shaft is configured to define a vibration-damping material engagement region engaging into said pivot shaft receiving recess.

13 . The exhaust-gas flap device of claim 12 , wherein said vibration-damping material engagement region is at least regionally of convex domed or conical or frustoconical form; and, said pivot shaft receiving recess is configured to have a form complementary to said vibration-damping material engagement region.

14 . The exhaust-gas flap device of claim 13 , wherein said vibration-damping material engagement region is configured to have a spherical-cap-shaped form.

15 . The exhaust-gas flap device of claim 8 , wherein said attachment region of said vibration-damping material is configured so as to project radially outwardly with respect to said contact region of said vibration-damping material.

16 . The exhaust-gas flap device of claim 8 , wherein said attachment region of said vibration-damping material is configured so as to at least partially surround said contact region of said vibration-damping material radially to the outside.

17 . The exhaust-gas flap device of claim 8 , wherein said attachment region of said vibration-damping material is configured so as to project radially outwardly with respect to said contact region of said vibration-damping material; and, said attachment region of said vibration-damping material is further configured so as to at least partially surround said contact region of said vibration-damping material radially to the outside.

18 . The exhaust-gas flap device of claim 8 , wherein said attachment region of said vibration-damping material is configured to have a flat form.

19 . The exhaust-gas flap device of claim 8 , wherein said attachment region of said vibration-damping material is attached to said base of said bearing bushing via material cohesion.

20 . The exhaust-gas flap device of claim 8 , wherein said attachment region of said vibration-damping material is attached to said base of said bearing bushing via welding.

21 . The exhaust-gas flap device of claim 1 , wherein said first bearing assembly includes a first bearing bushing provided on said flap pipe and a first pivot bearing arranged in said first bearing bushing and being configured to bear said pivot shaft radially and axially with respect to said pivot axis (A).

22 . The exhaust-gas flap device of claim 21 , wherein said first pivot bearing is a slide bearing.

23 . The exhaust-gas flap device of claim 1 , wherein said pivot drive further includes a coupling unit for coupling said drive element to said pivot shaft for conjoint rotation about said pivot axis.

24 . The exhaust-gas flap device of claim 7 , wherein said second pivot bearing is a plain or slide bearing.

Assignees

• Purem GmbH

Inventors

• Grün Matthias
• Birgler Markus
• Lory Markus
• Wacker Andreas
• Zeumer Annika
• Schenk Ralph
• Novosel Miljenko

Classifications

• F02D9/1085

  Non-organic materials, e.g. metals, alloys, ceramics · CPC title

• F02D9/10 Primary

  having pivotally-mounted flaps · CPC title

• F16K47/012

  by means of a resilient damping element · CPC title

• F02D9/106

  Sealing of the valve shaft in the housing, e.g. details of the bearings · CPC title

• F01N2240/36

  an exhaust flap · CPC title