Muffler for an exhaust system of an internal combustion engine

Patent metadata

Field	Value
Publication number	US-10167756-B2
Application number	US-201615334937-A
Country	US
Kind code	B2
Filing date	Oct 26, 2016
Priority date	Oct 30, 2015
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

A muffler for an exhaust system of an internal combustion engine includes a housing with a circumferential wall. At least one resonator chamber ( 48 ) is defined by the circumferential wall and two base walls ( 28, 22 ), that are provided in the housing. At least one resonator pipe ( 50 ), with a first pipe end ( 51 ) and with a second pipe end ( 56 ), is connected to one of the base walls ( 28 ) in the area of a first opening ( 52 ) in the one of the base walls ( 28 ). In the alternative or in addition the one of the base walls ( 28 ) traverses an interior space such that the first pipe end ( 51 ) lies outside of the resonator chamber ( 48 ), with the second pipe end ( 56 ) being fixed to the other base wall ( 22 ).

First claim

What is claimed is:

1. A muffler for an exhaust system of an internal combustion engine, the muffler comprising:
a housing comprised of a circumferential wall;
two base walls connected to the circumferential wall, wherein at least one resonator chamber is defined by the circumferential wall and the two base walls and is provided in the housing;
at least one resonator pipe with a first pipe end and with a second pipe end, the resonator pipe being connected to one of the base walls in an area of a first opening in the one of the base walls or traverses the one base wall such that the first pipe end lies outside of the resonator chamber, or the resonator pipe being connected to one of the base walls in the area of the first opening in the one of the base walls and traverses the one base wall such that the first pipe end lies outside of the resonator chamber, the second pipe end being fixed to another of the base walls, wherein a bulge formed on the another of the base walls engages into the resonator pipe at the second pipe end, the second pipe end being in flush contact with the another of the base walls, the resonator pipe comprising an interior space, at least a portion of the bulge being arranged in the interior space.

2. A muffler in accordance with claim 1 , wherein the second pipe end is fixed to the other of the base walls by a material connection, the bulge extending in a direction of the resonator chamber, wherein the bulge meshes with the interior of the resonator pipe at the second pipe end.

3. A muffler in accordance with claim 1 , wherein the second pipe end is fixed to the other of the base walls by a weld, the bulge extending in a direction of the resonator chamber, the bulge comprising a bulge outer surface, the resonator pipe comprising a resonator pipe inner surface, at least a portion of the resonator pipe inner surface being in direct contact with the bulge outer surface.

4. A muffler in accordance with claim 1 , wherein the resonator pipe, starting from the first pipe end, comprises a first resonator pipe section with a pipe wall without an opening and starting from the second pipe end comprises a second resonator pipe section connected to the first resonator pipe section, the resonator pipe being open toward the resonator chamber in the area of the second resonator pipe section, the bulge extending in a direction of the resonator chamber, the bulge comprising a bulge outer surface, the resonator pipe comprising a resonator pipe inner surface, at least a portion of the resonator pipe inner surface engaging at least a portion of the bulge outer surface.

5. A muffler in accordance with claim 4 , wherein the resonator pipe has a plurality of openings in the second resonator pipe section.

6. A muffler in accordance with claim 4 , wherein the resonator pipe has a plurality of holes in the second resonator pipe section.

7. A muffler in accordance with claim 4 , wherein the resonator pipe has at least one elongated opening in the second resonator pipe section.

8. A muffler in accordance with claim 7 , wherein:
the at least one elongated opening is essentially elongated in a resonator pipe longitudinal direction; or
the at least one elongated opening is open toward the second pipe end; or
the at least one elongated opening is essentially elongated in a resonator pipe longitudinal direction and the at least one elongated opening is open toward the second pipe end.

9. A muffler in accordance with claim 1 , further comprising at least one exhaust gas outlet pipe connected to the one of the base walls in an area of a second opening in the one of the base walls and connected to the other of the base walls in an area of a third opening in the other of the base walls.

10. A muffler in accordance with claim 1 , wherein:
the one of the base walls is an inner base wall separating the resonator chamber from an exhaust gas-carrying chamber; or
the other of the base walls is an outer base wall closing the housing to an outside; or
the one of the base walls is an inner base wall separating the resonator chamber from an exhaust gas-carrying chamber and the other of the base walls is an outer base wall closing the housing to an outside.

11. A muffler in accordance with claim 10 , wherein:
the muffler further comprises an exhaust gas inlet pipe introducing exhaust gas into the exhaust gas-carrying chamber; or
the first pipe end of the resonator pipe lies in the exhaust gas-carrying chamber; or
the muffler further comprises an exhaust gas inlet pipe introducing exhaust gas into the exhaust gas-carrying chamber and the first pipe end of the resonator pipe lies in the exhaust gas-carrying chamber.

12. An exhaust system for an internal combustion engine, comprising:
an exhaust carrying pipe; and
a muffler connected to the exhaust carrying pipe, the muffler comprising:
a housing comprised of a circumferential wall;
two base walls connected to the circumferential wall, wherein at least one resonator chamber is defined by the circumferential wall and the two base walls and is provided in the housing;
at least one resonator pipe with a first pipe end and with a second pipe end, the resonator pipe being connected to one of the base walls in an area of a first opening in the one of the base walls or traverses the one base wall such that the first pipe end lies outside of the resonator chamber, or the resonator pipe being connected to one of the base walls in the area of the first opening in the one of the base walls and traverses the one base wall such that the first pipe end lies outside of the resonator chamber, the second pipe end being fixed to another of the base walls, wherein a bulge formed on the another of the base walls engages into the resonator pipe at the second pipe end, the second pipe end being in flush contact with the another of the base walls, the resonator pipe comprising an interior space, at least a portion of the bulge being arranged in the interior space.

13. An exhaust system in accordance with claim 12 , wherein the second pipe end is fixed to the other of the base walls by a material connection, the bulge extending in a direction of the resonator chamber, wherein the bulge meshes with the interior of the resonator pipe at the second pipe end.

14. An exhaust system in accordance with claim 12 , wherein the resonator pipe, starting from the first pipe end, comprises a first resonator pipe section with a pipe wall without an opening and starting from the second pipe end comprises a second resonator pipe section connected to the first resonator pipe section, the resonator pipe being open toward the resonator chamber in the area of the second resonator pipe section, the bulge extending in a direction of the resonator chamber, the bulge comprising a bulge outer surface, the resonator pipe comprising a resonator pipe inner surface, at least a portion of the resonator pipe inner surface being in direct contact with the bulge outer surface.

15. An exhaust system in accordance with claim 14 , wherein:
the bulge extends in a direction of the resonator chamber;
the bulge comprises a bulge outer surface;
the resonator pipe comprises a resonator pipe inner surface;
at least a portion of the resonator pipe inner surface engages at least a portion of the bulge outer surface;
the resonator pipe has at least one elongated opening in the second resonator pipe section; and
the at least one elongated opening is essentially elongated in a resonator pipe longitudinal direction; or
the at least one elongated opening is open toward the second pipe end; or
the at least one elongated opening is essentially elo

Assignees

• Eberspaecher Exhaust Tech Gmbh

Inventors

• Marquardt-Stammberger Michael
• Schwarz Roland
• Uhlemann Thomas
• Rothfuss Mathias
• Straehle Martin
• Roehr Benjamin

Classifications

• F01N2490/155

  being disposed one after the other in flow direction · CPC title

• F01N2470/04

  characterised by shape, disposition or dimensions of apertures · CPC title

• F01N1/026

  Annular resonance chambers arranged concentrically to an exhaust passage and communicating with it, e.g. via at least one opening in the exhaust passage · CPC title

• G10K11/161

  in systems with fluid flow (G10K11/162 takes precedence; gas flow silencers or exhaust apparatus for machines or engines in general or for internal combustion engine F01N, noise absorbers in pipes or pipe systems F16L55/02; noise absorption in air conditioning and ventilation F24F13/24; silencing exhaust or propulsion jets in aircraft B64D33/06) · CPC title

• G10K11/172

  using resonance effects · CPC title