EP1832726A2 - Composant pour un dispositif d'échappement - Google Patents

Composant pour un dispositif d'échappement Download PDF

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Publication number
EP1832726A2
EP1832726A2 EP07102848A EP07102848A EP1832726A2 EP 1832726 A2 EP1832726 A2 EP 1832726A2 EP 07102848 A EP07102848 A EP 07102848A EP 07102848 A EP07102848 A EP 07102848A EP 1832726 A2 EP1832726 A2 EP 1832726A2
Authority
EP
European Patent Office
Prior art keywords
tube
longitudinal
holes
housing
perforation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07102848A
Other languages
German (de)
English (en)
Other versions
EP1832726B1 (fr
EP1832726A3 (fr
Inventor
Thomas Werber
Arnulf Spieth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eberspaecher Exhaust Technology GmbH and Co KG
Original Assignee
J Eberspaecher GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Publication of EP1832726A2 publication Critical patent/EP1832726A2/fr
Publication of EP1832726A3 publication Critical patent/EP1832726A3/fr
Application granted granted Critical
Publication of EP1832726B1 publication Critical patent/EP1832726B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/003—Silencing apparatus characterised by method of silencing by using dead chambers communicating with gas flow passages
    • F01N1/006—Silencing apparatus characterised by method of silencing by using dead chambers communicating with gas flow passages comprising at least one perforated tube extending from inlet to outlet of the silencer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/10—Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/02—Tubes being perforated
    • F01N2470/04—Tubes being perforated characterised by shape, disposition or dimensions of apertures

Definitions

  • the present invention relates to an exhaust gas-carrying component of an exhaust system for an internal combustion engine, in particular in a motor vehicle.
  • the invention also relates to an exhaust system equipped with such a component.
  • An exhaust system of an internal combustion engine in particular in motor vehicles, comprises a multiplicity of components which have an exhaust-gas-carrying pipe arranged in a housing.
  • an exhaust-gas-carrying pipe located in mufflers pipes which are arranged in a housing of the muffler. It may be necessary to design a wall of the respective tube permeable to airborne sound, for example, to allow airborne sound to enter an absorption space in which a damping of the airborne sound takes place.
  • the respective pipe can be equipped with a perforation.
  • pre-silencers are provided with a perforated tube which is enveloped by a housing in the circumferential direction to form an annular absorption chamber.
  • Exhaust systems are exposed to high thermal loads during operation, in particular during a warm-up phase of the internal combustion engine equipped therewith.
  • relatively large temperature differences can arise between an inner tube carrying exhaust gas and an outer housing.
  • tube and housing may be made of different materials with different thermal expansion coefficients. This can lead to greatly different thermal longitudinal expansion of the pipe on the one hand and the housing on the other.
  • the present invention is concerned with the problem of providing an improved embodiment for a component as well as for an exhaust system of the aforementioned type, which is characterized in particular by an inexpensive manufacturability.
  • the invention is based on the general idea of providing the tube with increased elastic flexibility by a selective selection or design of the perforation in its longitudinal direction.
  • the flexibility of the tube can be specifically designed so that thermally induced longitudinal expansion forces between the tube and the housing can be largely absorbed by a perforation provided with the longitudinal section of the tube by elastic deformation. In principle, slight plastic deformations can be tolerated as long as they do not endanger the pipe or the respective component.
  • the perforation is designed so that the thus provided longitudinal portion of the tube acts as a quasi spring. Thermally induced longitudinal expansion can thus be absorbed elastically by the tube.
  • the spring elasticity of the tube achieved with the aid of the perforation makes it possible to firmly connect the tube to the housing at its two end regions. A sliding seat is then no longer required.
  • the housing may, for. B. be assembled from identical half shells.
  • the tube and / or the housing may be symmetrical be so that in particular no mounting direction must be observed for the pipe.
  • the perforation may be formed by slots whose longitudinal direction extends in each case in the circumferential direction of the tube.
  • the elasticity of the tube in its longitudinal direction can be increased significantly.
  • the sole FIGURE 1 shows a simplified longitudinal section through a component of an exhaust system.
  • an exhaust system 1 of an internal combustion engine (not shown here) comprises at least one component 2, which is integrated, for example, in an exhaust line 3 of the exhaust system 1.
  • the exhaust system 1 is used for discharging exhaust gases of the internal combustion engine, which may be arranged for example in a motor vehicle.
  • the component 2 also serves for the exhaust gas routing, that is, the component 2 is traversed by exhaust gases during operation of the internal combustion engine.
  • the component 2 has a tube 4 and a housing 5.
  • the tube 4 has two longitudinal ends, namely a first longitudinal end 6 and a second longitudinal end 7.
  • the longitudinal ends 6, 7 are open in each case in the longitudinal direction of the tube 4.
  • the tube 4 extends in a straight line, so that the longitudinal ends 6, 7 are axially open.
  • the tube 4 is designed here cylindrical, it may have a circular or elliptical cross-section. In principle, an embodiment with a curved tube 4 is conceivable.
  • the pipe 4 is thus from the one (first) longitudinal end 6 to the other (second) longitudinal end 7 in the operation of the internal combustion engine can be flowed through by the exhaust gas.
  • the tube 4 has a longitudinal section 8, which is characterized here by a curly bracket.
  • the tube 4 has a wall 9 which is provided with a perforation 10.
  • end regions, namely a first end region 11 and a second end region 12 of the tube 4 are each provided with a wall 9 'which has no perforation 10.
  • the tube 4 is designed radially permeable in its longitudinal section 8 for airborne sound.
  • the tube 4 is fixedly connected to the housing 5 with the first end portion 11 having the first longitudinal end 6. Similarly, the tube 4 is also connected to its second end portion 12 having the second longitudinal end 7, fixed to the housing 5.
  • the fixed connection between the housing 5 and the end regions 11, 12 of the tube 4 can be realized, for example, by soldered connections or welded connections or crimp connections or in the same manner. This results in an intensive stiffening of the housing 5 in the end regions 11, 12 associated longitudinal sections of the housing fifth
  • the perforation 10 of the longitudinal section 8 of the tube 4 is specifically designed so that said longitudinal section 8 thermally induced longitudinal expansion forces between the tube 4 and the housing 5 can absorb it, that the longitudinal section 8 elastically deformed.
  • the pipe 4 directly exposed to the exhaust gas becomes much hotter than the housing 5, which can also radiate heat into the environment. This results in a temperature difference between the tube 4 and the housing 5, which leads to greatly different longitudinal expansion in the tube 4 on the one hand and in the housing 5 on the other.
  • the choice of material for the tube 4 and the housing 5 can lead to different longitudinal expansions. Typical examples are austenite and ferrite combinations.
  • the tube 4 tends to expand much more in its longitudinal direction than the housing 5.
  • the tube 4 Since the tube 4 is fixed in the case of the component 2 shown here at its end portions 11, 12 on the housing 5, the tube 4 with respect to the housing 5 is not expand to the required extent, whereby corresponding longitudinal expansion forces between the tube 4 and the housing 5 arise.
  • the tube 4 is softer than the housing 5, whereby the longitudinal section 8 can be upset. Due to the specifically designed perforation 10 this compression takes place largely in the elastic deformation region of the longitudinal section 8. The resulting longitudinal expansion forces can thus be absorbed by the longitudinal section 8 is substantially resilient. Due to the elasticity of the longitudinal section 8 or the tube 4 achieved with the aid of the perforation 10, different longitudinal expansions can be cushioned, without excessive forces acting on the tube 4, on the housing 5 and on the connection points between the tube 4 and the housing 5.
  • the design of the perforation 10 is carried out so that the longitudinal section 8 can still absorb those thermal longitudinal expansion forces between the tube 4 and housing 5 substantially by elastic deformation, the maximum in the normal operation of the exhaust system 1 and the engine equipped therewith expected temperature difference between Tube 4 and housing 5 may occur.
  • the deformations occurring in the longitudinal section 8 are mainly elastic. It is clear that over the life of the component 2 and plastic deformation can occur. By the perforation 10 it is achieved that the deformations occurring in the longitudinal section 8 occur so far in the elastic region that possibly also occurring plastic deformations cause the pipe 4 in the Scheduled life of the component 2 no serious damage to the pipe 4.
  • both end portions 11, 12 can be fixed in the same way with the housing 5, a symmetrical construction for the tube 4 and for the housing 5 is possible. As a result, the assembly of the component 2 can be simplified. Furthermore, the manufacture of the tube 4 and the manufacture of the housing 5 can be simplified. In particular, the housing 5 can be assembled, for example, from two identical half-shells.
  • the perforation 10 is formed by a plurality of oblong holes 13.
  • the individual elongated holes 13 in the wall 9 are arranged so that they extend with their longitudinal direction in the circumferential direction of the tube 4.
  • all elongated holes 13 are preferably of the same size.
  • the slots 13 are arranged here in rows of holes 14. These rows of holes 14 each contain a plurality of spaced apart in the circumferential direction of the tube 4 slots 13 and are adjacent to each other in the longitudinal direction of the tube 4.
  • the elongated holes 13 of each row of holes 14 are offset relative to the slots 13 of an adjacent in the longitudinal direction of the tube 4 row of holes 14 in the circumferential direction of the tube 4.
  • an offset 15 between the oblong holes 13 of a row of holes 14 with respect to the oblong holes 13 of adjacent thereto in the tube longitudinal direction hole row 14 is exactly as large as measured in the tube circumferential direction half length 16 of a slot 13 plus a measured in the tube circumferential direction half Distance 17 between two adjacent oblong holes 13 of the same row of holes 14. This results from row of holes 14 to row of holes 14 with respect to the distances 17 symmetrical overlap of each adjacent slots 13.
  • the Offset 15 can be avoided by the longitudinal section 8 in the tube longitudinal direction continuous web.
  • the distance 17 of adjacent elongated holes 13 of the same row of holes 14 measured in the tube circumferential direction is e.g. Furthermore, a measured in the tube longitudinal direction distance 18 between two adjacent rows of holes 14 may be approximately the same size as a measured in the tube longitudinal direction width 19 of the elongated holes 13.
  • the perforation 10 can also be realized with openings having a different geometry from the slots 13.
  • the perforated longitudinal section 8 expediently extends directly from the first end region 11 to the second end region 12.
  • the component 2 is designed as a silencer, in particular as a front silencer.
  • the housing 5 encloses the tube 4 radially spaced between the end regions 11, 12, whereby radially between the tube 4 and the housing 5, an annular space 20th arises.
  • This annular space 20, also called absorption space is preferably filled with a sound-absorbing material 21 or absorption material.
  • airborne sound which propagates in the exhaust gas can enter the annular space 20 transversely to the flow direction through the perforation 10, as a result of which it is more or less damped by the sound absorption material.
  • the tube 4 passes completely through the housing 5, so that the length of the housing 5 measured in the tube longitudinal direction approximately coincides with that of the tube 4.
  • the tube 4 extends only within a portion of the housing 5. It is conceivable, for example, a funnel-shaped configuration of the tube 4.
  • the tube 4 may for example form an inner funnel, which is arranged in a configured as an outer funnel housing portion to realize an air gap insulation. While such inner funnels are conventionally cantilever-mounted or free-standing on one axial end due to the expected thermal length changes, it is possible through the perforated longitudinal section 8 to firmly connect the tube 4 designed as an inner funnel with the housing at its two end regions 11, 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
EP07102848.4A 2006-03-08 2007-02-22 Composant pour un dispositif d'échappement Expired - Fee Related EP1832726B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006011091A DE102006011091A1 (de) 2006-03-08 2006-03-08 Komponente einer Abgasanlage

Publications (3)

Publication Number Publication Date
EP1832726A2 true EP1832726A2 (fr) 2007-09-12
EP1832726A3 EP1832726A3 (fr) 2009-03-25
EP1832726B1 EP1832726B1 (fr) 2017-10-18

Family

ID=38066578

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07102848.4A Expired - Fee Related EP1832726B1 (fr) 2006-03-08 2007-02-22 Composant pour un dispositif d'échappement

Country Status (5)

Country Link
US (1) US7444806B2 (fr)
EP (1) EP1832726B1 (fr)
JP (1) JP5389332B2 (fr)
CN (1) CN101033703B (fr)
DE (1) DE102006011091A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220235842A1 (en) * 2021-01-27 2022-07-28 Futaba Industrial Co., Ltd. Vibration damping band and muffler

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009059684A1 (de) 2009-12-19 2011-06-22 J. Eberspächer GmbH & Co. KG, 73730 Abgasbehandlungseinrichtung
CN102011628B (zh) * 2010-12-30 2012-09-26 柳州五菱汽车有限责任公司 一种汽车消声器及其筒体
US20130037261A1 (en) 2011-08-12 2013-02-14 Baker Hughes Incorporated System and method for reduction of an effect of a tube wave
DE102011086463C5 (de) * 2011-11-16 2021-11-18 Purem GmbH Entkoppelelement für eine Abgasanlage
US9790836B2 (en) 2012-11-20 2017-10-17 Tenneco Automotive Operating Company, Inc. Loose-fill insulation exhaust gas treatment device and methods of manufacturing
US9175648B2 (en) * 2013-10-17 2015-11-03 Ford Global Technologies, Llc Intake system having a silencer device
DE102015113159A1 (de) 2015-08-10 2017-02-16 Faurecia Emissions Control Technologies, Germany Gmbh Bauteil einer Abgasanlage
CN105402005A (zh) * 2015-12-18 2016-03-16 力帆实业(集团)股份有限公司 一种排气系统及其前消声器
CN110821602A (zh) * 2019-11-11 2020-02-21 西安航天动力研究所 一种管式消声器
US11300021B2 (en) * 2019-11-14 2022-04-12 Purem Novi, Inc. Exhaust component with louver bridge for suppressing vehicle exhaust pipe resonances and vehicle exhaust system with exhaust component

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB602859A (en) * 1946-04-24 1948-06-03 Cecil Gordon Vokes Improvements in silencers
US3754619A (en) * 1971-06-11 1973-08-28 Tenneco Inc Low backpressure straight through muffler
US4184565A (en) * 1978-12-15 1980-01-22 Harris V C Exhaust muffler
US4338284A (en) * 1979-09-04 1982-07-06 Vinco Sales Corp., Inc. Exhaust gas purifier
JPH0882210A (ja) * 1994-09-13 1996-03-26 Daihatsu Motor Co Ltd 排気消音器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3545565A (en) * 1969-11-20 1970-12-08 Horace Mccaffrey Jr Sound attenuating structure
US5101930A (en) * 1990-08-28 1992-04-07 Otis Elevator Company Hydraulic elevator muffler
US5962821A (en) * 1995-01-27 1999-10-05 Iannetti; Francesco E. Internal combustion engine noise reduction apparatus
US5892186A (en) * 1997-11-03 1999-04-06 Flowmaster, Inc. Muffler with gas-dispersing shell and sound-absorption layers
US6880670B2 (en) * 2002-10-29 2005-04-19 Beda Charles Dondi Muffler for suction system exhaust air used with an automatic cutting machine
EP1524415A1 (fr) * 2003-10-15 2005-04-20 Zeuna-Stärker Gmbh & Co Kg Silencieux d'échappement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB602859A (en) * 1946-04-24 1948-06-03 Cecil Gordon Vokes Improvements in silencers
US3754619A (en) * 1971-06-11 1973-08-28 Tenneco Inc Low backpressure straight through muffler
US4184565A (en) * 1978-12-15 1980-01-22 Harris V C Exhaust muffler
US4338284A (en) * 1979-09-04 1982-07-06 Vinco Sales Corp., Inc. Exhaust gas purifier
JPH0882210A (ja) * 1994-09-13 1996-03-26 Daihatsu Motor Co Ltd 排気消音器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220235842A1 (en) * 2021-01-27 2022-07-28 Futaba Industrial Co., Ltd. Vibration damping band and muffler

Also Published As

Publication number Publication date
DE102006011091A1 (de) 2007-09-13
EP1832726B1 (fr) 2017-10-18
JP2007239749A (ja) 2007-09-20
US20070209354A1 (en) 2007-09-13
US7444806B2 (en) 2008-11-04
CN101033703A (zh) 2007-09-12
JP5389332B2 (ja) 2014-01-15
EP1832726A3 (fr) 2009-03-25
CN101033703B (zh) 2012-07-18

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