Exhaust system

Patent metadata

Field	Value
Publication number	US-11268432-B2
Application number	US-202117142873-A
Country	US
Kind code	B2
Filing date	Jan 6, 2021
Priority date	Jan 9, 2020
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

An internal combustion engine exhaust system includes an exhaust gas treatment unit carried at a carrier. The carrier has a receiving opening (20), receiving the treatment unit, with a first sealing surface (28) enclosing the opening. The exhaust gas treatment unit has a second sealing surface (42), enclosing a treatment unit longitudinal axis, located opposite the first sealing surface. The exhaust gas treatment unit has a third sealing surface (44), enclosing the treatment unit longitudinal axis. A closing element (48), fixable with the exhaust gas treatment unit to the carrier, has a fourth sealing surface (50), located opposite the third sealing surface. A first sealing element (52) is arranged between the first sealing surface and the second sealing surface. A second sealing element (54) is arranged between the third sealing surface and the fourth sealing surface. The first sealing element and the second sealing element are of identical configuration.

First claim

What is claimed is:

1. An exhaust system for an internal combustion engine, the exhaust system comprising:
carrier structure;
an exhaust gas treatment unit carried at the carrier structure, the exhaust gas treatment unit being elongated in a direction of an exhaust gas treatment unit longitudinal axis, wherein:
the carrier structure has a receiving opening with an opening central axis for receiving the exhaust gas treatment unit in the carrier structure and has a first sealing surface with a ring shape enclosing the opening central axis;
the exhaust gas treatment unit has a second sealing surface with a ring shape enclosing the exhaust gas treatment unit longitudinal axis, wherein the second sealing surface is located opposite the first sealing surface with the exhaust gas treatment unit received in the carrier structure; and
the exhaust gas treatment unit has a third sealing surface with a ring shape enclosing the exhaust gas treatment unit longitudinal axis;

a closing element configured to be fixed, together with the exhaust gas treatment unit, to the carrier structure, wherein:
the closing element has a fourth ring shape sealing surface; and
the fourth sealing surface is located opposite the third sealing surface with the closing element fixed, together with the exhaust gas treatment unit, to the carrier structure;

a first sealing element arranged between the first sealing surface and the second sealing surface; and
a second sealing element arranged between the third sealing surface and the fourth sealing surface, wherein the first sealing element and the second sealing element have an identical configuration.

2. The exhaust system in accordance with claim 1 , wherein:
the first sealing element and the second sealing element each comprise a ring shape sealing element body;
each ring shape sealing element body comprises an inner clamping section protruding in a radially inward direction from an adjacent inner circumferential area of the ring shape sealing element body; and
each ring shape sealing element body comprises an outer clamping section protruding in a radially outward direction from an adjacent outer circumferential area of the ring shape sealing element body.

3. The exhaust system in accordance with claim 2 , wherein:
the inner clamping section of the first sealing element is clamped at the exhaust gas treatment unit; and
the outer clamping sections of the second sealing element is clamped at the exhaust gas treatment unit.

4. The exhaust system in accordance with claim 1 , wherein the exhaust gas treatment unit comprises:
an exhaust gas treatment assembly unit; and
a jacket elongated in the direction of the exhaust gas treatment unit longitudinal axis, the jacket comprising a first pipe section carrying the exhaust gas treatment assembly unit, a radial expansion area adjoining the first pipe section in a radial inward direction and providing the second sealing surface and a third sealing surface and a second pipe section adjoining the radial expansion area in the radial outward direction.

5. The exhaust system in accordance with claim 3 , wherein:
the exhaust gas treatment unit comprises: an exhaust gas treatment assembly unit; and a jacket elongated in the direction of the exhaust gas treatment unit longitudinal axis, the jacket comprising a first pipe section carrying the exhaust gas treatment assembly unit, a radial expansion area adjoining the first pipe section in a radial inward direction and providing the second sealing surface and a third sealing surface and a second pipe section adjoining the radial expansion area in the radial outward direction; and wherein:
the inner clamping section of the first sealing element is clamped at the jacket in an area of the first pipe section or in the area of a transition from the first pipe section to the radial expansion area or the outer clamping section; or
the outer clamping section of the second sealing element is clamped at the jacket in an area of the second pipe section or in the area of a transition from the radial expansion area to the second pipe section; or
the inner clamping section of the first sealing element is clamped at the jacket in an area of the first pipe section or in the area of a transition from the first pipe section to the radial expansion area or the outer clamping section and the outer clamping section of the second sealing element is clamped at the jacket in an area of the second pipe section or in the area of a transition from the radial expansion area to the second pipe section.

6. The exhaust system in accordance with claim 1 , wherein:
the first sealing surface and the second sealing surface each have radially inner and radially outer sealing surface edge areas which are axially offset to one another; or
the third sealing surface and the fourth sealing surface each have radially inner and radially outer sealing surface edge areas which are axially offset to one another; or
the first sealing surface and the second sealing surface each have radially inner and radially outer sealing surface edge areas which are axially offset to one another or and the third sealing surface and the fourth sealing surface each have radially inner and radially outer sealing surface edge areas which are axially offset to one another.

7. The exhaust system in accordance with claim 1 , wherein:
the carrier structure comprises a carrier part providing the receiving opening;
a ring shape connecting flange provides the first sealing surface and encloses the opening central axis at the carrier part.

8. The exhaust system in accordance with claim 1 , further comprising a fastening element, wherein:
the carrier structure provides a ring shape first fastening element clamping surface enclosing the receiving opening;
the closing element provides a ring shape second fastening element clamping surface;
the fastening element fixes the closing element together with the exhaust gas treatment unit, to the carrier structure and extends radially over the first fastening element clamping surface and over the second fastening element clamping surface; and
the closing element presses against the carrier structure with the exhaust gas treatment unit carried at the carrier structure.

9. The exhaust system in accordance with claim 8 , wherein the first fastening element clamping surface and the second fastening element clamping surface are arranged facing away from one another axially and are sloped towards one another from the radially inward direction to the radially outward direction.

10. The exhaust system in accordance with claim 8 , wherein the fastening element comprises a clamp.

11. The exhaust system in accordance with claim 1 , wherein the first sealing element and the second sealing element are configured as metal crimp gaskets.

12. The exhaust system in accordance with claim 1 , wherein:
the first sealing surface and the second sealing surface are configured to be curved essentially complementary to one another in an axial direction from a radially inward direction to a radially outward direction; or
the third sealing surface and the fourth sealing surface are configured to be curved essentially complementary to one another in the axial direction from the radially inward direction to the radially outward direction; or
the first sealing surface and the second sealing surface are configured to be curved essentially complementary to one another in the axial direction from the radially inward direction to the radially outward direction and the third sealing surface and the fourth sealing surface are configured to be curved essentially complementary to one another in the axial directi

Assignees

• Eberspaecher Exhaust Tech Gmbh
• Purem GmbH

Inventors

• Kast Peter
• Dentler Michael
• Eder Vincent
• Karabateas Oliver
• Neumann Felix

Classifications

• F01N2450/30

  Removable or rechangeable blocks or cartridges, e.g. for filters · CPC title

• F01N13/185

  the connection being realised by deforming housing, tube, baffle, plate, or parts thereof · CPC title

• F01N13/085

  having means preventing foreign matter from entering exhaust conduit · CPC title

• F01N3/2892

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

• F01N13/1827 Primary

  Sealings specially adapted for exhaust systems (sealings in general F16J15/00) · CPC title