EP2362076A2 - Amortisseur de bruit - Google Patents

Amortisseur de bruit Download PDF

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Publication number
EP2362076A2
EP2362076A2 EP11150812A EP11150812A EP2362076A2 EP 2362076 A2 EP2362076 A2 EP 2362076A2 EP 11150812 A EP11150812 A EP 11150812A EP 11150812 A EP11150812 A EP 11150812A EP 2362076 A2 EP2362076 A2 EP 2362076A2
Authority
EP
European Patent Office
Prior art keywords
tube
outlet
deflecting
housing
flow
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
EP11150812A
Other languages
German (de)
English (en)
Other versions
EP2362076B1 (fr
EP2362076A3 (fr
Inventor
Peter Gorke
Michael Pommerer
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 EP2362076A2 publication Critical patent/EP2362076A2/fr
Publication of EP2362076A3 publication Critical patent/EP2362076A3/fr
Application granted granted Critical
Publication of EP2362076B1 publication Critical patent/EP2362076B1/fr
Active 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
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/084—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes

Definitions

  • the present invention relates to a silencer, in particular a rear silencer, for an exhaust system of an internal combustion engine, in particular of a motor vehicle.
  • a so-called rear silencer In an exhaust system, a so-called rear silencer is usually located in an exit-side end section of the exhaust system. A leading out of the rear silencer outlet pipe usually forms a so-called tail pipe or is connected to such a tail pipe.
  • the tailpipe has the open mouth of the exhaust system to the environment.
  • a silencer includes a housing in which there is an exit space from which said exit pipe leads out.
  • it is customary to perform the outlet pipe of the rear silencer and the tailpipe comparatively long. This comparatively much space is needed. Especially with smaller vehicles, only a small amount of space is available.
  • the use of outlet pipes or tailpipes of great length is of particular importance for smaller internal combustion engines with, for example, three or four cylinders, especially if the overall soundproofing is to be realized with less space and less weight.
  • the present invention is concerned with the problem of providing for a muffler of the type mentioned an improved embodiment, which is characterized in particular by a reduced overall volume.
  • the invention is based on the general idea not to design the outlet tube as a single tube, but as a tube assembly, as a tube-in-tube arrangement.
  • a tube-in-tube arrangement has at least one arranged in the housing of the muffler, closed on one side deflecting tube and led out of the housing outlet pipe. Due to the tube-in-tube arrangement, a comparatively long flow path can be realized with a short overall length, which takes place with the aid of corresponding deflections.
  • the tube-in-tube arrangement can build considerably shorter than a comparable tube with the same flow length. Studies have shown that the tube-in-tube arrangement achieves equivalent attenuation in terms of low frequencies as a through-tube. At higher frequencies even a better damping effect is achieved, which is attributed to the cross-sectional jumps in the area of the flow deflections.
  • the proposed construction thus enables a construction space-reduced realization of a silencer with a long flow path in the "outlet pipe" or in the outlet pipe arrangement, in which, moreover, the desired damping effect is ensured for low interference frequencies.
  • the tube-in-tube arrangement can produce a flow path which comprises at least two 180 ° deflections from the outlet space to the outlet tube. This results in a 3-fold stratification for the exhaust gas flow, which ultimately leads to a significant shortening of the outlet tube arrangement in relation to a single tube.
  • the deflecting tube has on its closed side a concavely curved bottom to the outlet tube.
  • the flow resistance of the muffler be reduced.
  • the housing or an outer tube enclosing the deflecting tube may have, on its side facing the open side of the deflecting tube, a concavely curved bottom in relation to the deflecting tube. As a result, the 180 ° deflection is favored, which reduces the flow resistance of the muffler.
  • a Strömungsumschkontur is attached to an open side of the deflection tube.
  • a resistance-reducing flow deflection can also be supported. This may be, for example, a deflecting collar which deflects the flow to the outside or a rounded end region, which likewise favors the flow around the flow.
  • the outlet tube can be provided to equip the outlet tube with a perforation on its inlet side, that is to say within the deflection tube.
  • a perforation can reduce the generation of higher-frequency noise.
  • the outlet pipe may be attached to its inlet side on the deflection tube. This results in a stabilization of the outlet tube within the tube-in-tube arrangement. The attachment of the outlet tube to the deflection tube can be carried out in particular in the region of the perforation.
  • Fig. 1 and 2 includes a muffler 1, which is preferably a rear muffler, a housing 2, which contains an outlet space 3. From the housing 2, an outlet tube assembly 4 is led out, in such a way that the outlet tube assembly 4 is fluidly connected to the inlet side located in the housing 2 outlet space 3.
  • the muffler 1 is integrated in the installed state in a here only partially recognizable exhaust system 5, which belongs to an internal combustion engine, not shown here, which are preferably arranged in a motor vehicle can. If the muffler 1 is preferably configured as a rear muffler 1, it is located in an exit-side end region of the exhaust system 5.
  • the outlet pipe arrangement 4 led out of the housing 2 comprises a so-called tail pipe 6 of the exhaust system 5 or is connected to this tail pipe 6.
  • the tailpipe 6 is characterized in that it has the outlet-side orifice of the exhaust system 5 or the respective strand of the exhaust system 5.
  • the rear silencer 1 is thus located on the tailpipe 6 or close to the tailpipe 6.
  • the outlet tube arrangement 4 is designed as a tube-in-tube arrangement 7. This comprises at least one deflection tube 8 and an outlet tube 9.
  • the deflection tube 8 is arranged in the housing 2 and is closed on one side.
  • the outlet pipe 9 is arranged in the deflection tube 8 and led out of the housing 2. If it is a rear muffler 1, the outlet pipe 9 may be connected to the tailpipe 6 or pass directly into the tailpipe 6 or even form the tailpipe 6.
  • the tube-in-tube arrangement 7 generates a flow path 10 indicated by arrows, which leads from the outlet space 3 to the outlet tube 9 or leads out of the housing 2 through the outlet tube 9.
  • the first 180 ° deflection 11 takes place in the housing 2 at the inlet into the deflecting tube 8.
  • the second 180 ° deflection 12 takes place in the deflecting tube 8 at the entrance to the outlet pipe.
  • the tube-in-tube arrangement 7 has an outer channel 13, which is formed radially between the housing 2 and the deflection tube 8.
  • the outer channel 13 may also be formed between the deflection tube 8 and an outer tube, not shown here, which is arranged within the housing 2 and which surrounds the deflection tube 8.
  • the tube-in-tube arrangement 7 here comprises an inner channel 14, which is formed radially between the deflection tube 8 and the outlet tube 9.
  • the first 180 ° deflection 11 connects the outer channel 13 with the inner channel 14.
  • the second 180 ° deflection 12 connects the inner channel 14 with the interior 15 of the outlet tube 9.
  • the housing 2, the deflection tube 8 and the outlet tube 9 and optionally the outer tube are arranged axially parallel to each other.
  • deflecting tube 8 and outlet tube 9 and optionally the outer tube can be arranged concentrically to each other.
  • all the tubes 8, 9 or the housing 2 involved are arranged eccentrically relative to one another.
  • the outlet tube 9 is arranged concentrically with respect to the housing 2, while the deflection tube 8 is arranged eccentrically to the housing 2 and to the outlet tube 9.
  • Fig. 6 another embodiment shown, in which the deflection tube 8 and the housing 2 show other round, in particular elliptical or oval, cross-sections. Chosen here is an example that leads to an extremely flat design for the muffler 1.
  • the deflection tube 8 and the housing 2 are flattened here so far that at the outlet tube 9, two diametrically opposed contracting points 16 result, in which the deflection tube 8 contacts both the outlet tube 9 and the housing 2.
  • the tubes 8, 9 and the housing 2 can be fastened to one another.
  • the flow-through cross-section of the outer channel 13 with respect to the flow-through cross-section of the inner channel 14 so that the cross-section through which the outer channel 13 flows is smaller than the cross-section through which the inner channel 14 can flow.
  • the cross-section through which the outer channel 13 flows can be the same be as large as the flow-through cross section of the inner channel 14. In this way, an excessive pressure increase is avoided when overflow from the outer channel 13 into the inner channel 14.
  • the cross-section of the inner channel 14 may also be provided here to select the cross-section of the inner channel 14 to be the same size as the cross-section through which the exhaust pipe 9 can flow the flow-through cross sections of the outer channel 13, the inner channel 14 and the outlet pipe 9 can be coordinated with each other with regard to a reduced flow resistance.
  • the deflecting tube 8 may be provided on its closed side with a bottom 17 which is concave towards the outlet tube 9 out.
  • the second 180 ° deflection 12 can be supported or realized with a reduced flow resistance.
  • the housing 2 on its side facing the open side of the deflecting tube 8 side equipped with a traversed by the outlet pipe 9 bottom 18, which is curved concavely towards the deflecting tube 8. By this shaping of the bottom 18, the first 180 ° deflection 11 can be supported or realized with a reduced flow resistance.
  • the deflection tube 8 may have a flow deflection contour 19 on its open side. Again, this is a measure to reduce the flow resistance.
  • the flow deflection contour 19 may be a deflection collar 20 that deflects the flow outward. In contrast, it may vary according to Fig. 8 at the Strömungsumschkontur 19 also act around a rounded end portion 21. Likewise, other configurations, not shown here, for the flow deflection contour 19 are conceivable.
  • the outlet pipe 9 is provided at its inlet side with a perforation 22.
  • a perforation 22 may hinder noise when flowing into the outlet pipe 9.
  • the outlet tube 9 protrudes into the deflection tube 8 far enough that it can be fastened to the deflection tube 8 on its inlet side.
  • the outlet pipe 9 in the region of its perforation 22 on the deflection tube 8, namely attached to the bottom 17.
  • the outlet pipe 9 is stabilized within the tube-in-tube arrangement 7.
  • Fig. 8 an embodiment in which the outlet pipe 9 projects freestanding in the deflection tube 8.
  • FIGS. 7 and 8 These are half-sections, with a dot-dash line 23 representing a line of symmetry with respect to which the respective representation can be supplemented with mirror symmetry.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
EP11150812.3A 2010-02-18 2011-01-13 Amortisseur de bruit Active EP2362076B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010008403A DE102010008403A1 (de) 2010-02-18 2010-02-18 Schalldämpfer

Publications (3)

Publication Number Publication Date
EP2362076A2 true EP2362076A2 (fr) 2011-08-31
EP2362076A3 EP2362076A3 (fr) 2012-05-16
EP2362076B1 EP2362076B1 (fr) 2014-04-02

Family

ID=43921053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11150812.3A Active EP2362076B1 (fr) 2010-02-18 2011-01-13 Amortisseur de bruit

Country Status (5)

Country Link
US (1) US8302732B2 (fr)
EP (1) EP2362076B1 (fr)
JP (1) JP6039880B2 (fr)
CN (1) CN102162386B (fr)
DE (1) DE102010008403A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010049578A1 (de) * 2010-10-26 2012-04-26 Webasto Ag Schalldämpfereinrichtung für eine Fluidleitung sowie Heizgerät mit einer Schalldämpfereinrichtung
KR101315266B1 (ko) * 2012-02-24 2013-10-08 세종공업 주식회사 소음기용 테일파이프구조
DE102012006544B4 (de) 2012-04-02 2015-12-31 Tenneco Gmbh Schalldämpfer mit Ankopplung Endrohr über Kopplungskammer
CN103836339A (zh) * 2012-11-27 2014-06-04 深圳市达航工业有限公司 飞机气源车的供气消音器
US8978819B2 (en) * 2013-06-07 2015-03-17 Yamaha Hatsudoki Kabushiki Kaisha Spark arrestor, muffler, and straddle type vehicle
CA2915863A1 (fr) * 2013-06-19 2014-12-24 James Gene Norvell Appareil silencieux a recyclage de flux et son procede
CN104324582B (zh) * 2014-11-14 2018-02-27 北京中成航宇空分设备有限公司 变压吸附设备消声器、变压吸附设备
JP6059749B2 (ja) * 2015-02-23 2017-01-11 本田技研工業株式会社 排気マフラー
CN107849955B (zh) * 2015-06-17 2021-10-26 奥比托澳大利亚有限公司 消音器
DE102017107599A1 (de) * 2017-04-10 2018-10-11 Gardner Denver Deutschland Gmbh Pulsations-Schalldämpfer für Kompressoren
DE102017117607A1 (de) * 2017-08-03 2019-02-07 Faurecia Emissions Control Technologies, Germany Gmbh Kraftfahrzeugschalldämpfer
US10765787B2 (en) * 2017-09-21 2020-09-08 DAO Health Compact sound suppressing muffler for breast vacuum pumps
CN108980049B (zh) * 2018-09-17 2023-09-26 西安交通大学 一种螺杆压缩机气流脉动衰减装置
US11391195B2 (en) * 2019-06-19 2022-07-19 Tenneco Automotive Operating Company Inc. Exhaust system and muffler
JP7382204B2 (ja) * 2019-10-23 2023-11-16 株式会社ブリヂストン 排水管構造用消音器

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DE39488C (de) 1900-01-01 J. F. A. Freiherr VON PALSTRING in Kötiz bei Coswig, Sachsen Antriebsvorrichtung für Fuhrwerke und dergl
DD39488A (fr) *
FR330668A (fr) * 1903-03-28 1903-08-24 Lorenzo William Crosta Pot d'échappement silencieux
AT54721B (de) 1909-11-23 1912-08-10 Internat Metal Products Compan Verfahren zur Herstellung von schmiedbarem Eisen aus Roheisen beliebiger Herkunft.
US1338520A (en) * 1919-07-03 1920-04-27 George W Moores Muffler
DE647591C (de) * 1935-08-01 1937-07-08 Josef Hawle Schalldaempfer fuer Brennkraftmaschinen
GB593282A (en) * 1944-12-14 1947-10-13 Maxim Silencer Co Improvements in and relating to silencers for the gases of internal combustion engines
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Title
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Also Published As

Publication number Publication date
CN102162386B (zh) 2015-06-17
US20110198150A1 (en) 2011-08-18
JP6039880B2 (ja) 2016-12-07
US8302732B2 (en) 2012-11-06
EP2362076B1 (fr) 2014-04-02
JP2011169323A (ja) 2011-09-01
CN102162386A (zh) 2011-08-24
EP2362076A3 (fr) 2012-05-16
DE102010008403A1 (de) 2011-08-18

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