US3776366A - Exhaust muffler - Google Patents

Exhaust muffler Download PDF

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Publication number
US3776366A
US3776366A US00274445A US3776366DA US3776366A US 3776366 A US3776366 A US 3776366A US 00274445 A US00274445 A US 00274445A US 3776366D A US3776366D A US 3776366DA US 3776366 A US3776366 A US 3776366A
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US
United States
Prior art keywords
inlet
chamber
outlet
partition
length
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.)
Expired - Lifetime
Application number
US00274445A
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English (en)
Inventor
E Betts
D Hanson
D Stephenson
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.)
Outboard Marine Corp
Original Assignee
Outboard Marine Corp
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 Outboard Marine Corp filed Critical Outboard Marine Corp
Application granted granted Critical
Publication of US3776366A publication Critical patent/US3776366A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • 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
    • 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 exhaust gas passages, pipes or tubes
    • F01N2470/14—Plurality of outlet tubes, e.g. in parallel or with different length
    • 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 exhaust gas passages, pipes or tubes
    • F01N2470/18—Structure or shape of exhaust gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
    • 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
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/15—Plurality of resonance or dead chambers
    • F01N2490/155—Plurality of resonance or dead chambers being disposed one after the other in flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
    • F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines

Definitions

  • a muffler comprising an elongated [22] Filed: July 24,1972 housing'including a generally cylindrical side walland,
  • the invention provides .a muffler which beneficially reduces noise level while having a substantially minor effect on engine power.
  • the muffler is sub-divided into various chambers by dished or partially spherical end walls and intermediate partitions.
  • the partitions are provided with ports which provide communication between the chambers, which are preferably formed, at least in part,
  • one or more discharge tubes are provided, which discharge tubes preferably extend lengthwise within the housing for a substantial distance and have a relatively small cross-sectional area as compared to length within the housing.
  • the considerable length of the discharge tubes apparently prevents significant backflow of atmospheric air into the mufflers and thereby serves to prevent backfiring'within the muffler.
  • a muffler including ports which afford communication between chambers and which are of rela tively short length, together with one or more tail pipes which have-a substantial length within the muffler and which have a relatively small cross sectional area in relation to length within the mufiler.
  • the invention provides a deflector plate which is preferably perforated and which is mounted in an inlet chamber in the path'of incoming exhaust gases so as to diffuse such incoming exhaust gases throughout the inlet chamber and to thereby reduce structural de-. formation caused by heat concentration.
  • One of the principal objects of the invention is the provision of a muffler which has superior noise reducing capability, together with little apparent disadvanta-.
  • a muffler 11 which embodies various of the features of the invention and .which includes a housing or shell 13 defined by an arcuately extending outer or side wall 15.
  • the outer or side wall 15 is cylindrical in form. -At its ends, the side wall 15 is closed by respective end walls 17 and 19 which are dished.
  • the illustrated end walls 17 and 19 are each partially spherically shaped and are preferably concavely inwardly arranged, Connected to the outer surface of the end walls 17 and 19 are respective support brackets 21.
  • the housing 13 is sub-divided into an inlet chamber 23 and an outlet chamber 25 by a first dished partition 27 which is located so that the inlet chamber 23 has a length slightly greater than about A the length of the housing 13.
  • the partition 27 is partially spherically shaped and extends convexly with respect to the inlet chamber 23, although the partition 27 could extend convexly with respect to the outlet chamber 25.
  • outlet chamber 25 is further sub-divided into an intermediate sub-ehamber 29 and an outlet sub-chamber'3l by a second, dished partition 33 located generally centr'ally of the length of the outlet chamber 25. While other arcuate shapes could be employed, the illustrated partition '33 is partially spherically shaped and extends concavely with respect to the intermediate sub chamber 29, although the partition 33 could extend concavely with respect to the outlet sub-chamber 31.
  • the first partition 27 is provided with at least one port 35 which is preferably formed, at least in part, from the material of the first partition 27 and which includes a tubular part or portion 37 extending for a relatively short length from the inlet chamber 23 and into the outlet chamber 25 and including an inlet 39 having a margin which merges with the first partition 27 and has a curved cross section in a plane extending radially with respect to the length or axis of the tubular portion.
  • the port 35 also includes an outlet 41 at the end of the tubular portion 37 spaced from the first partition 27 and located inwardly of the outlet chamber 25 in a plane generally perpendicular. to the length of the tubular respect to the discharge tube 59.
  • the second partition 33 includes at least one port 45 communicating between the intermediate sub-chamber 29 and the outlet sub-chamber 31.
  • a second port 47 is also employed, which ports 45 and 47 are located in angularly spaced relation to each other and to the ports 35 and 43 in the first partition 27.
  • Each of the ports 45 and 47 in the second partition 33 is preferably formed, at least in part, from the material of the second partition 33 and includes a tubular portion 49 having an inlet 51 with a margin which merges with the second partition 33 and has a curved cross section in a plane extending radially with respect to the length or axis of the tubular portion.
  • the ports 47 and 45 also include an outlet 53 at the ends of the tubular portions 49 located inwardly of the outlet subchamber 31 and in a plane generally perpendicular to the length of the tubular portions 49.
  • the tubular portions could extend at an angle to the length of the muffler housing 13, it is preferred to form the ports 45 and 47 as illustrated with the tubular portions 49 extending parallel to the length of the muffler housing 13.
  • the muffler 11 includes an inlet tube or duct 55 which extends radially outwardly from the inlet chamber 23 through the side wall and includes, at its outer end,
  • the muffler further includes at least one outlet or discharge tube or duct or tail pipe 59 which communicates with the outlet sub-chamber .31 and extends outwardly through the side wall 15.
  • a second discharge tube 61 extends in generally parallel relation to the discharge tube 59.
  • the discharge tube or tubes could pass directly through that portion of the side wall 15 which defines I the outlet sub-chamber 31, it is preferred to at least partially locate the .outlet tubes 59 and 61 lengthwise within the housing 13 in inward and outward radial relation to each other. More specifically, it is preferred that the discharge tubes 59 and 61 extend within the housing for a substantial length and have a relatively small cross sectional area as compared to the length thereof. In this regard, it is preferred to construct the tubes 59 and 61 with a ratio between the cross sectional area (in square inches) and the length within the housing 13 (in inches) within the range of 0.25 to0.073, which ratio is expressed as a decimal by dividing the length into the area.
  • each of the outlet tubes 59 and 61 is formed with an elongated inlet portion 63 which extends lengthwise of the Imuffler housing'13 through both the first and second partitions 27 and 33, respectively, and which includes an inlet 65 in the outlet sub- .chamber 31.
  • Each ofthe'outlet tubes 59 and 61 also includes an outlet portion 67 which communicates with the inlet portion 63 and which extends, at least in part, through the inlet chamber 23 and outwardly through the side 'wall '15 defining the inlet chamber 23.
  • both the outlet or discharge tubes 59 and 61 have an identical length except that the radially outward tube 59 has a larger outlet portion 67 so that theoutlet portions 67 of both of the discharge tubes 59 and 61 terminate at about the same place.
  • the inlet portion 63 of the radially inner discharge tube 61 extends within the outletsub-chamber 31 for a greater distance than does the inlet portion 63 I of the radially outer discharge. tube 59.
  • the first and second partitions 27 and 33 respectively can be provided with' radially spaced and relatively short ports or tubes 69 which receive the discharge tubes 59 and 61 and which connected to and supported by the radially inner dis charge tube 61, and which includes a series of perfora tions 73. Accordingly, the deflector plate 71 is arranged so as to disperse or deflect the incoming exhaust gases throughout the inlet chamber 23 so as thereby to prevent structural deformation caused by heat concentration in a particular area.
  • the disclosed muffler 11 beneficially reduces noise level withoutsubstantially reducing the engine power and, in addition, substantially reduces or eliminates muffler backfiring. More specifically, the curved, dished, or partially spherical condition of the end walls 17 and 19 and the partitions 27 and 33 is believed to prevent or reduce drumming orshell noise'produced by the muffler in response to excitation by the exhaust gases within the various chambers.
  • the length of the discharge tubesor tail pipes 59 and 61 from the outlet portion 67 to the outlet sub-chamber 31 is also believed to beneficially substantially reduce or eliminate backfiring within the muffler by preventing significant backflow of atmospheric air into the muffler for combinapressure loss prior to the discharge tubes 59 and 61 so as to permit maximum allowable back pressure loss to occur in the discharge tubes 59 and 61.
  • the shortness of the tubular portions 37 and 49 is also believed to reduce the resonant frequency of the muffler.
  • the discharge tubes 59 and 61 also beneficially function to reduce the amplitude of low frequency noise.
  • a muffler comprising an elongated housing having an elongated outer wall and including a partition dividing said housing into an inlet chamber and an outlet chamber, said partition including a port communicating between said inlet chamber and said outlet chamher, an inlet tube extending through said elongated outer wall and communicating with said inlet chamber, and a discharge tube including an inlet portion extending lengthwise of said housing through said partition and having an inlet in said outlet chamber, said inlet portion being imperforate in said inlet chamber, and an imperforate outlet portion communicating with said inlet portion and extending at least partially in said inlet chamber and outwardly through said elongated outer wall.
  • a muffler in accordance with claim 1 wherein said discharge tube has a relatively long length in said housing and a relatively small cross sectional area as compared with said length, the ratio of 'said cross section area to said length in said housing of said discharge tube being between 0.25 and 0.073 with said length in inches divided into said area in square inches.
  • An exhaust muffler in accordance with claim 1 including a perforated deflector mounted in said inlet chamber inthe path of exhaust gas entering said inlet chamber from said inlet tube.
  • a muffler in accordance with claim 1 including a second port located in said partition and angularly spaced from said first mentioned port, said first mentioned port and said second port each extending from said inlet chamber into said outlet chamber and each including a tubular part with-an inlet having a margin which merges with said partition and has an arcuate form in a plane extending radially of the length of said tubular part.
  • said second partition including therein a port communicating between said intermediate and outlet sub-chambers, an inlet tube extending through said outer wall and com- .municating with said inlet chamber, and a discharge tube including an inlet portion communication with said outlet sub-chamber and extending lengthwise of said housing through said first and second partitions; said inlet portion being imperforate in said inlet chamber and in said intermediate sub-chamber, said discharge tubealso including an imperforate outlet portion communicating with said inlet portion and extending at least partially in said inlet chamber and out wardly through said elongated outer wall.
  • An exhaust muffler in accordance with claim 9 including a perforated deflector mounted in said inlet chamber in the path of exhaust gas entering said inlet chamber from said inlet tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
US00274445A 1972-07-24 1972-07-24 Exhaust muffler Expired - Lifetime US3776366A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27444572A 1972-07-24 1972-07-24

Publications (1)

Publication Number Publication Date
US3776366A true US3776366A (en) 1973-12-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00274445A Expired - Lifetime US3776366A (en) 1972-07-24 1972-07-24 Exhaust muffler

Country Status (3)

Country Link
US (1) US3776366A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS572889B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA984691A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4022291A (en) * 1975-11-21 1977-05-10 Outboard Marine Corporation Exhaust muffler having an attenuater can assembly
US20040003963A1 (en) * 2000-04-14 2004-01-08 Siegfried Worner Multiple-chambered exhaust muffler
WO2006131165A1 (de) * 2005-06-08 2006-12-14 Emcon Technologies Germany (Augsburg) Gmbh Fahrzeugschalldämpfer
US20070256409A1 (en) * 2006-05-01 2007-11-08 Yamaha Hatsudoki Kabushiki Kaisha Exhaust device and vehicle with exhaust device
US20090032332A1 (en) * 2007-08-02 2009-02-05 Georg Reuther Housings for flue gas units
US20090090530A1 (en) * 2007-07-13 2009-04-09 Longyear Tm, Inc. Noise abatement device for a pneumatic tool
US20090294211A1 (en) * 2008-05-28 2009-12-03 Longyear Tm, Inc. Noise reducing device for a pneumatic tool
US20100116586A1 (en) * 2008-11-07 2010-05-13 Joachim Andre Muffler and corresponding manufacturing process
DE102008062014A1 (de) * 2008-12-12 2010-06-17 Friedrich Boysen Gmbh & Co. Kg Schalldämpfer
US20110126541A1 (en) * 2009-12-02 2011-06-02 Longyear Tm, Inc. Muffler system for noise abatement and ice control
WO2012168039A1 (de) * 2011-06-08 2012-12-13 J. Eberspächer GmbH & Co. KG Schalldämpfer und herstellungsverfahren
US11215105B2 (en) * 2018-01-05 2022-01-04 Futaba Industrial Co., Ltd. Muffler system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60140486U (ja) * 1984-02-29 1985-09-17 カンボウプラス株式会社 遮光防炎カ−テンシ−ト

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD54137A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) *
US1998385A (en) * 1933-03-08 1935-04-16 Herbert S Powell Muffler for internal combustion engines
US2239549A (en) * 1940-03-04 1941-04-22 Burgess Battery Co Silencing device for pulsating gases
US2520756A (en) * 1945-12-03 1950-08-29 Nelson Muffler Corp Exhaust silencer for internalcombustion engines
US2825421A (en) * 1953-10-02 1958-03-04 Nelson Muffler Corp Muffler
US2841236A (en) * 1955-06-10 1958-07-01 Fluor Corp Manifold type pulsation dampeners
US2960179A (en) * 1954-07-27 1960-11-15 Nelson Muffler Corp Exhaust muffler
US3388769A (en) * 1966-08-04 1968-06-18 Walker Mfg Co Dual inlet and outlet muffler
US3419107A (en) * 1967-07-03 1968-12-31 Nash Engineering Co Manifold muffler arrangement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH064084U (ja) * 1992-06-11 1994-01-18 鐘紡株式会社 紡績機械のスライバ供給装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD54137A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) *
US1998385A (en) * 1933-03-08 1935-04-16 Herbert S Powell Muffler for internal combustion engines
US2239549A (en) * 1940-03-04 1941-04-22 Burgess Battery Co Silencing device for pulsating gases
US2520756A (en) * 1945-12-03 1950-08-29 Nelson Muffler Corp Exhaust silencer for internalcombustion engines
US2825421A (en) * 1953-10-02 1958-03-04 Nelson Muffler Corp Muffler
US2960179A (en) * 1954-07-27 1960-11-15 Nelson Muffler Corp Exhaust muffler
US2841236A (en) * 1955-06-10 1958-07-01 Fluor Corp Manifold type pulsation dampeners
US3388769A (en) * 1966-08-04 1968-06-18 Walker Mfg Co Dual inlet and outlet muffler
US3419107A (en) * 1967-07-03 1968-12-31 Nash Engineering Co Manifold muffler arrangement

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4022291A (en) * 1975-11-21 1977-05-10 Outboard Marine Corporation Exhaust muffler having an attenuater can assembly
US20040003963A1 (en) * 2000-04-14 2004-01-08 Siegfried Worner Multiple-chambered exhaust muffler
US7004283B2 (en) * 2000-04-14 2006-02-28 J. Eberspächer GmbH & Co. KG Multiple-chambered exhaust muffler
DE102005026376C5 (de) 2005-06-08 2019-05-02 Faurecia Emissions Control Technologies, Germany Gmbh Fahrzeugschalldämpfer
WO2006131165A1 (de) * 2005-06-08 2006-12-14 Emcon Technologies Germany (Augsburg) Gmbh Fahrzeugschalldämpfer
US8051949B2 (en) 2005-06-08 2011-11-08 Emcon Technologies Germany (Augsburg) Gmbh Vehicle exhaust muffler
US20080196969A1 (en) * 2005-06-08 2008-08-21 Emcon Technologies Germany (Augsburg) Gmbh Vehicle Exhaust Muffler
CN101194089B (zh) * 2005-06-08 2012-07-04 佛吉亚排放控制技术德国有限公司 车辆消声器
DE102005026376B4 (de) * 2005-06-08 2015-10-22 Faurecia Emissions Control Technologies, Germany Gmbh Fahrzeugschalldämpfer
US20070256409A1 (en) * 2006-05-01 2007-11-08 Yamaha Hatsudoki Kabushiki Kaisha Exhaust device and vehicle with exhaust device
US8359835B2 (en) * 2006-05-01 2013-01-29 Yamaha Hatsudoki Kabushiki Kaisha Exhaust device and vehicle with exhaust device
US7681690B2 (en) * 2007-07-13 2010-03-23 Longyear Tm, Inc. Noise abatement device for a pneumatic tool
US20090090530A1 (en) * 2007-07-13 2009-04-09 Longyear Tm, Inc. Noise abatement device for a pneumatic tool
US20100155174A1 (en) * 2007-07-13 2010-06-24 Longyear Tm, Inc. Noise abatement device for a pneumatic tool
US7845464B2 (en) 2007-07-13 2010-12-07 Longyear Tm, Inc. Noise abatement device for a pneumatic tool
US20090032332A1 (en) * 2007-08-02 2009-02-05 Georg Reuther Housings for flue gas units
US7934583B2 (en) * 2007-08-02 2011-05-03 Heinrich Gillet Gmbh Housings for flue gas units
US20090294211A1 (en) * 2008-05-28 2009-12-03 Longyear Tm, Inc. Noise reducing device for a pneumatic tool
US7735603B2 (en) 2008-05-28 2010-06-15 Longyear Tm, Inc. Noise reducing device for a pneumatic tool
DE102008056350A1 (de) * 2008-11-07 2010-07-01 J. Eberspächer GmbH & Co. KG Schalldämpfer und zugehöriges Herstellungsverfahren
US20100116586A1 (en) * 2008-11-07 2010-05-13 Joachim Andre Muffler and corresponding manufacturing process
DE102008056350B4 (de) * 2008-11-07 2016-01-07 Eberspächer Exhaust Technology GmbH & Co. KG Schalldämpfer und zugehöriges Herstellungsverfahren
DE102008062014A1 (de) * 2008-12-12 2010-06-17 Friedrich Boysen Gmbh & Co. Kg Schalldämpfer
US20110126541A1 (en) * 2009-12-02 2011-06-02 Longyear Tm, Inc. Muffler system for noise abatement and ice control
US8215449B2 (en) 2009-12-02 2012-07-10 Longyear Tm, Inc. Muffler system for noise abatement and ice control
US9010486B2 (en) * 2011-06-08 2015-04-21 Eberspächer Exhaust Technology GmbH & Co. KG Silencer and a method for producing same
US20140116801A1 (en) * 2011-06-08 2014-05-01 Joachim Andre Silencer and a method for producing same
DE102011077183B4 (de) * 2011-06-08 2015-05-21 Eberspächer Exhaust Technology GmbH & Co. KG Schalldämpfer und Herstellungsverfahren
CN103582745A (zh) * 2011-06-08 2014-02-12 埃贝斯佩歇废气技术合资公司 消声器及其制造方法
DE102011077183A1 (de) * 2011-06-08 2012-12-13 J. Eberspächer GmbH & Co. KG Schalldämpfer und Herstellungsverfahren
RU2579425C2 (ru) * 2011-06-08 2016-04-10 Эбершпехер Игзост Технолоджи Гмбх Унд Ко. Кг Глушитель и способ его изготовления
CN103582745B (zh) * 2011-06-08 2016-11-23 埃贝斯佩歇废气技术合资公司 消声器及其制造方法
WO2012168039A1 (de) * 2011-06-08 2012-12-13 J. Eberspächer GmbH & Co. KG Schalldämpfer und herstellungsverfahren
US11215105B2 (en) * 2018-01-05 2022-01-04 Futaba Industrial Co., Ltd. Muffler system

Also Published As

Publication number Publication date
CA984691A (en) 1976-03-02
JPS4957234A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-06-04
JPS572889B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1982-01-19

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