US20150337699A1 - Muffler - Google Patents

Muffler Download PDF

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Publication number
US20150337699A1
US20150337699A1 US14/758,730 US201314758730A US2015337699A1 US 20150337699 A1 US20150337699 A1 US 20150337699A1 US 201314758730 A US201314758730 A US 201314758730A US 2015337699 A1 US2015337699 A1 US 2015337699A1
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US
United States
Prior art keywords
tubular member
flow path
diameter
muffler
resonance chamber
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.)
Abandoned
Application number
US14/758,730
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English (en)
Inventor
Katsuhiko Kainuma
Tomohiro Furuya
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.)
Futaba Industrial Co Ltd
Original Assignee
Futaba Industrial Co Ltd
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 Futaba Industrial Co Ltd filed Critical Futaba Industrial Co Ltd
Assigned to FUTABA INDUSTRIAL CO., LTD. reassignment FUTABA INDUSTRIAL CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FURUYA, TOMOHIRO, KAINUMA, KATSUHIKO
Publication of US20150337699A1 publication Critical patent/US20150337699A1/en
Abandoned 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
    • F01N1/023—Helmholtz resonators
    • 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
    • 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
    • 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
    • F01N2470/24—Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled

Definitions

  • the present invention relates to a muffler that reduces exhaust noise.
  • Patent Document 1 includes a structure in which a muffler of a side branch type resonant system is provided between the main muffler and the sub-muffler.
  • a muffler of a Helmholtz type resonant system As a muffler of a resonant system, a muffler of a Helmholtz type resonant system is known in addition to the above-described muffler of the side branch type resonant system.
  • the Helmholtz type muffler is formed with a structure in which the exhaust flow path leads to a resonance chamber having a large volume via a long and narrow communication path, and thus, a problem has been found in which the structure is inevitably complicated.
  • a muffler of a Helmholtz type resonant system it is preferable to form a muffler of a Helmholtz type resonant system with a simple structure.
  • An aspect of the present invention is a muffler that comprises a first tubular member that forms an exhaust flow path of an internal combustion engine, and a second tubular member that is connected to the first tubular member and forms the exhaust flow path together with the first tubular member.
  • a double pipe portion is formed in which an end portion of the first tubular member is inserted into the second tubular member from an end portion thereof.
  • a leading end portion of the second tubular member is joined to an outer periphery of the first tubular member.
  • a portion that forms the double pipe portion of the second tubular member comprises a first portion located closer to an end of the first tubular member, and a second portion that is located closer to an end of the second tubular member and that has an enlarged diameter compared with the first portion.
  • a resonance chamber is formed between the first tubular member and the second portion.
  • a communication path that allows communication between the exhaust flow path and the resonance chamber is formed between the first tubular member and the first portion.
  • a Helmholtz type resonant system is formed by the resonance chamber and the communication path.
  • the Helmholtz type resonant system can be formed with a simple structure because the resonance chamber and the communication path of the Helmholtz type resonant system are formed using the double pipe portion formed by the two tubular members that form the exhaust flow path.
  • a spacer that inhibits contact between the first tubular member and the second tubular member may be provided in the communication path, and the spacer may be arranged so as to secure an air passage on an outer circumference of the first tubular member so that the communication path is not blocked. According to such a configuration, the communication path is less likely to be blocked, and an effect of reducing exhaust noise can thereby be enhanced.
  • each of the first tubular member and the second tubular member may be formed as a single part. According to such a configuration, it is not necessary to separately use dedicated components to form the Helmholtz type resonant system, and thus, space saving, cost reduction, and the like can be sought.
  • one aspect of the present invention can be achieved in various forms, such as an exhaust system including a muffler, and a method for muffling exhaust noise, besides the above-described muffler.
  • FIG. 1 is a plan view of an exhaust system of an embodiment.
  • FIG. 2 is a sectional view taken along a line II-II in FIG. 1 .
  • FIG. 3A is an exploded perspective view of a muffler
  • FIG. 3B is a transparent perspective view of the muffler.
  • FIG. 4 is a sectional view taken along a line IV-IV in FIG. 2 .
  • An exhaust system 1 shown in FIG. 1 forms an exhaust flow path, which is a flow path of exhaust gas discharged from an internal combustion engine of an automobile.
  • the exhaust system 1 is mainly configured with a flow path member 2 of a tubular shape forming the exhaust flow path having a long actual length.
  • the exhaust system 1 has a catalytic converter 3 , a sub-muffler 4 , and a main muffler 5 arranged in series with each other in order from the upstream of the exhaust flow path (from the left in FIG. 1 ) along the flow path member 2 (the exhaust flow path).
  • the flow path member 2 comprises a first tubular member 10 that forms the exhaust flow path in the downstream of the sub-muffler 4 , and a second tubular member 20 that is connected to a downstream-side end portion of the first tubular member 10 and forms the exhaust flow path in the upstream of the main muffler 5 .
  • the sub-muffler 4 and the main muffler 5 are connected to each other via the first tubular member 10 and the second tubular member 20 .
  • the first tubular member 10 is a member formed by processing a circular pipe part having an outside diameter R 1 (60.5 mm, for example), and is configured as a single part.
  • the first tubular member 10 is a member formed by reducing in diameter an end portion located in the downstream side (the right side in FIG. 2 ) of the circular pipe part having the outside diameter R 1 , specifically a portion having a length L 1 from an end, to an outside diameter R 2 (54.7 mm, for example) that is smaller than the outside diameter R 1 .
  • the portion having the length L 1 from the end of the first tubular member 10 is referred to as a “reduced diameter portion 11 ”, and the remaining portion is referred to as a “body portion 12 ”.
  • the second tubular member 20 is a member formed by processing the circular pipe part having the outside diameter R 1 similarly to the first tubular member 10 , and is configured as a single part similarly to the first tubular member 10 .
  • the second tubular member 20 is a member formed by enlarging in diameter an end portion located in the upstream side (the left side in FIG. 2 ) of the circular pipe part having the outside diameter R 1 , specifically a portion having a length L 2 from an end, to an outside diameter larger than the outside diameter R 1 .
  • the second tubular member 20 is gradually increased in outside diameter from a position the length L 2 apart from the end toward the end, and becomes largest in outside diameter (120 mm, for example) at a position a length L 3 apart from the end (L 3 ⁇ L 2 ). Then, the second tubular member 20 is gradually decreased in outside diameter from a position a length L 4 apart from the end (L 4 ⁇ L 3 ) toward the end.
  • Such a shape is formed by performing a diameter enlarging process on the portion having the length L 2 from the end and then performing a diameter reducing process on a portion having the length L 4 from the end, for example.
  • the portion having the length L 2 from the end in the second tubular member 20 is referred to as an “enlarged diameter portion 21 ”, and the remaining portion is referred to as a “body portion 22 ”.
  • the downstream-side end portion of the first tubular member 10 is inserted into the second tubular member 20 from an upstream-side end portion (a leading end portion 23 of the enlarged diameter portion 21 ) of the second tubular member 20 in such a manner that central axes thereof are coincident with each other.
  • a double pipe portion including the first tubular member 10 as an inner pipe and the second tubular member 20 as an outer pipe (a portion in which the first tubular member 10 and the second tubular member 20 overlap with each other) is formed in a connection (a joint to be described later and a portion adjacent thereto) between the first tubular member 10 and the second tubular member 20 .
  • the connection between the first tubular member 10 and the second tubular member 20 functions as a muffler 30 of a Helmholtz type resonant system, as will be described below.
  • the second tubular member 20 is joined (welded all around in the present embodiment) to the first tubular member 10 , specifically on an outer periphery of the body portion 12 .
  • a dead-end space is formed that communicates with the exhaust flow path, between the first tubular member 10 and the second tubular member 20 .
  • a resonance chamber 31 having a large volume is formed between the body portion 12 of the first tubular member 10 and the enlarged diameter portion 21 of the second tubular member 20 .
  • a volume required as the resonance chamber 31 is secured by the enlarged diameter portion 21 of the second tubular member 20 .
  • a communication path 32 is formed between the reduced diameter portion 11 of the first tubular member 10 and the body portion 22 of the second tubular member 20 .
  • the communication path 32 is a space a cross-sectional area of which orthogonal to an axial direction is smaller than that of the resonance chamber 31 , and allows communication between the exhaust flow path and the resonance chamber 31 .
  • the resonance chamber 31 and the communication path 32 are designed to configure the Helmholtz type resonant system.
  • a wire mesh 40 which is a metal buffer member.
  • the wire mesh 40 functions as a spacer to inhibit contact between the first tubular member 10 and the second tubular member 20 .
  • the wire mesh 40 also has a function of reducing stress of thermal contraction difference between the first tubular member 10 and the second tubular member 20 . It is to be noted that an outside diameter of the wire mesh 40 is equal to or smaller than the outside diameter R 1 of the body portion 12 of the first tubular member 10 .
  • the wire mesh 40 is arranged so that an air passage is secured in an outer circumference of the first tubular member 10 .
  • a plurality of (three in this example) the wire meshes 40 having a circular arc shape along the outer periphery of the first tubular member 10 are arranged on some parts of the entire outer circumference (range of 360 degrees) of the first tubular member 10 , as shown in FIG. 4 .
  • the three wire meshes 40 are not as long as the entire outer circumference of the first tubular member 10 even when all of them are pieced together.
  • the three wire meshes 40 are arranged shifted from each other in an axial direction of the first tubular member 10 (on different positions in the axial direction) (see FIG. 2 ). Consequently, the air passage is secured successfully on the outer circumference of the first tubular member 10 .
  • the muffler 30 is designed such that a resonance frequency thereof is coincident with an Nth-order mode (N is a natural number, and 1 in the present embodiment) of air column resonance frequency of a pipe, and the end of the first tubular member 10 is arranged so as to be at a position of the maximum sound pressure of the Nth mode.
  • N is a natural number, and 1 in the present embodiment
  • the muffler 30 comprises the first tubular member 10 that forms the exhaust flow path of the internal combustion engine, and the second tubular member 20 that is connected to the first tubular member 10 and forms the exhaust flow path together with the first tubular member 10 .
  • the double pipe portion is formed in which the end of the first tubular member 10 is inserted into the second tubular member 20 from the leading end portion 23 thereof, and the leading end portion 23 of the second tubular member 20 is joined to the outer periphery of the first tubular member 10 .
  • the portion that forms the double pipe portion of the second tubular member 20 comprises the body portion 22 located closer to the end of the first tubular member 10 , and the enlarged diameter portion 21 that is located closer to the end of the second tubular member 20 and that has the enlarged diameter compared with the body portion 22 .
  • the resonance chamber 31 is formed between the first tubular member 10 and the enlarged diameter portion 21 .
  • the communication path 32 that allows communication between the exhaust flow path and the resonance chamber 31 is formed between the first tubular member 10 and the body portion 22 .
  • the Helmholtz type resonant system is formed by the resonance chamber 31 and the communication path 32 .
  • the Helmholtz type resonant system can be configured with a simple structure because the resonance chamber 31 and the communication path 32 of the Helmholtz type resonant system are formed using the double pipe portion formed by the first tubular member 10 and the second tubular member 20 that form the exhaust flow path. Especially, since the Helmholtz type resonant system is adopted, a muffling effect can be enhanced by increasing the volume of the resonance chamber 31 .
  • the structure having the long communication path is achieved in the present embodiment, and noise reduction effect can thereby be enhanced.
  • the wire mesh 40 that inhibits contact between the first tubular member 10 and the second tubular member 20 is provided in the communication path 32 .
  • the wire mesh 40 is arranged so as to secure the air passage on the outer circumference of the first tubular member 10 so that the communication path 32 is not blocked.
  • the communication path 32 is less likely to be blocked, and an effect of reducing exhaust noise can thereby be enhanced.
  • Each of the first tubular member 10 and the second tubular member 20 is formed as a single part.
  • dedicated components to form a muffler a resonance chamber and a communication path
  • the structure is likely to be complicated and larger, and the number of the components is increased as well as the number of portions to be joined (welded), which is likely to result in increase in cost.
  • the muffler 30 of the present embodiment is configured with the first tubular member 10 and the second tubular member 20 forming the exhaust flow path and, furthermore, the number of the portions to be joined (welded) is one.
  • the muffler 30 of the present embodiment has an advantage that space saving, cost reduction, and the like can be easily sought.
  • the muffler 30 of the present embodiment is configured with the tubular members, there is another advantage that the muffler 30 has a bending workability and can be easily applied to a layout of the exhaust system 1 .
  • the muffler 30 is designed such that the resonance frequency thereof is coincident with the Nth-order mode of the air column resonance frequency of the pipe, and the end of the first tubular member 10 is arranged so as to be at the position of the maximum sound pressure of the Nth mode.
  • the maximum reduction can be obtained with the mode coincident with the resonance frequency.
  • the air column resonance can be inhibited by reducing the sound pressure by a certain volume even in the other mode.
  • the first tubular member 10 has the reduced diameter portion 11 formed therein, and the wire mesh 40 having the outside diameter equal to or smaller than the outside diameter R 1 of the body portion 12 is used.
  • the first tubular member 10 having the wire mesh 40 attached thereon can be easily inserted into the second tubular member 20 . Consequently, according to the present embodiment, the first tubular member 10 and the second tubular member 20 can be assembled to each other more easily.
  • the wire mesh 40 shown in the above embodiment is an example, and the configuration is not limited to this.
  • the wire mesh 40 may be one in number or may be two or more in number.
  • the position in which the wire mesh 40 is arranged is also not limited in particular.
  • two C-shaped wire meshes having a shape of a halved ring, for example, may be arranged shifted in the axial direction of the first tubular member 10 .
  • a member other than the wire mesh 40 may be used as the spacer.
  • the spacer may be formed by processing (for example, by forming projecting portions on) at least one of the first tubular member 10 and the second tubular member 20 . Alternatively, a configuration without the spacer may be possible.
  • the first tubular member 10 may be formed of a plurality of parts.
  • a circular pipe part having the outside diameter R 2 and a circular pipe part having the outside diameter R 1 are used, an area to be reduced in diameter can be decreased, or the diameter reducing process itself can be eliminated.
  • the second tubular member 20 may also be formed of a plurality of parts.
  • the first tubular member 10 may comprise no reduced diameter portion 11 .
  • the first tubular member 10 and the second tubular member 20 are formed using the circular pipe parts having the same outside diameter.
  • the configuration is not limited to this.
  • a circular pipe part having an outside diameter larger than that of the first tubular member 10 may be used as the second tubular member 20 .
  • the first tubular member 10 and the second tubular member 20 may be formed using parts other than the circular pipe part (a tubular member having a section of oval or polygonal shape, for example).
  • the resonance chamber 31 shown in the above embodiment is an example, and the configuration is not limited to this.
  • the resonance chamber 31 is formed by the enlarged diameter portion 21 that is expanded into an approximately trapezoidal shape when viewed from the side (viewed from a direction orthogonal to the axial direction) in the above embodiment
  • the resonance chamber instead of this, may be formed by an enlarged diameter portion expanded into, for example, an approximately triangular shape or an approximately rectangular shape.
  • the configuration has been exemplified in which the muffler 30 is arranged in the exhaust flow path connecting the sub-muffler 4 and the main muffler 5 to each other.
  • the configuration is not limited to this.
  • the configuration of the exhaust system on which the present invention is premised is also not limited to the above embodiment, and a configuration without a sub-muffler may be adopted, for example.
  • a positional relationship between the first tubular member (an inner pipe of the double pipe portion) and the second tubular member (an outer pipe of the double pipe portion), i.e., whether they are located upstream or downstream, may be opposite to that in the above embodiment. That is, the second tubular member may be arranged in the upstream of the exhaust flow path, and the first tubular member may be arranged in the downstream of the exhaust flow path.
  • Each of the elements of the present invention is a conceptual one, and is not limited to the above embodiment.
  • the function of one element may be dispersed over a plurality of elements, or the functions of a plurality of elements may be integrated to one element.
  • at least part of the configuration of the above embodiment may be replaced by a known configuration having a similar function.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
US14/758,730 2013-01-11 2013-12-18 Muffler Abandoned US20150337699A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2013003714A JP6162407B2 (ja) 2013-01-11 2013-01-11 消音器
JP2013-003714 2013-02-22
PCT/JP2013/083960 WO2014109192A1 (ja) 2013-01-11 2013-12-18 消音器

Publications (1)

Publication Number Publication Date
US20150337699A1 true US20150337699A1 (en) 2015-11-26

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US14/758,730 Abandoned US20150337699A1 (en) 2013-01-11 2013-12-18 Muffler

Country Status (6)

Country Link
US (1) US20150337699A1 (ja)
EP (1) EP2944783A4 (ja)
JP (1) JP6162407B2 (ja)
CN (1) CN104903556A (ja)
CA (1) CA2897138A1 (ja)
WO (1) WO2014109192A1 (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170241311A1 (en) * 2014-09-11 2017-08-24 Faurecia Emissions Control Technologies, Usa, Llc Exhaust Tube and Tuning Tube Assembly with Whistle Reduction Feature
US10961895B2 (en) 2016-01-21 2021-03-30 Futaba Industrial Co., Ltd. Muffler
US11261768B2 (en) 2018-01-26 2022-03-01 Futaba Industrial Co., Ltd. Muffler
US11319847B2 (en) 2018-09-19 2022-05-03 Tenneco Automotive Operating Company Inc. Exhaust device with noise suppression system
US20220186642A1 (en) * 2020-12-16 2022-06-16 Futaba Industrial Co., Ltd. Exhaust pipe

Families Citing this family (6)

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Publication number Priority date Publication date Assignee Title
US9095827B2 (en) 2008-04-21 2015-08-04 Tenneco Automotive Operating Company Inc. Exhaust gas flow mixer
US8939638B2 (en) 2008-04-21 2015-01-27 Tenneco Automotive Operating Company Inc. Method for mixing an exhaust gas flow
US9534525B2 (en) 2015-05-27 2017-01-03 Tenneco Automotive Operating Company Inc. Mixer assembly for exhaust aftertreatment system
CN107622764A (zh) * 2016-07-13 2018-01-23 于泳林 一种噪音消除装置
US9856776B1 (en) * 2016-09-15 2018-01-02 Caterpillar Inc. Muffler with double shell housing
JP7457046B2 (ja) 2022-02-21 2024-03-27 フタバ産業株式会社 排気管

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US3348629A (en) * 1965-10-07 1967-10-24 Gen Motors Corp Resonator silencer
US3404750A (en) * 1966-07-14 1968-10-08 Walker Mfg Co Combination tailpipe spout and silencer
US3543878A (en) * 1969-08-19 1970-12-01 Chrysler Corp Automobile exhaust muffler
US3561562A (en) * 1970-01-02 1971-02-09 Vincent E Ignoffo Automotive exhaust system units
US4589515A (en) * 1984-02-08 1986-05-20 Nissan Motor Company, Limited Exhaust tail pipe arrangement
US5016730A (en) * 1990-01-17 1991-05-21 Tolo, Inc. Acoustic filter having acoustic isolation of internal flow element
US5025889A (en) * 1989-08-25 1991-06-25 General Motors Corporation Engine noise reducer
US5168132A (en) * 1990-04-30 1992-12-01 Christian Beidl Exhaust gas muffler
US5245140A (en) * 1992-04-20 1993-09-14 Wu Kan Chiao Muffler
US5839473A (en) * 1996-06-20 1998-11-24 Camco Manufacturing Inc. RV generator auxiliary exhaust system and method
US5967193A (en) * 1996-05-29 1999-10-19 Calsonic Corporation Flexible pipe unit for use in exhaust pipe line of automotive engine
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Publication number Priority date Publication date Assignee Title
US2512823A (en) * 1945-05-02 1950-06-27 Blundell Alfred Air intake and exhaust silencer for internal-combustion engines
US3348629A (en) * 1965-10-07 1967-10-24 Gen Motors Corp Resonator silencer
US3404750A (en) * 1966-07-14 1968-10-08 Walker Mfg Co Combination tailpipe spout and silencer
US3543878A (en) * 1969-08-19 1970-12-01 Chrysler Corp Automobile exhaust muffler
US3561562A (en) * 1970-01-02 1971-02-09 Vincent E Ignoffo Automotive exhaust system units
US6336471B1 (en) * 1981-07-16 2002-01-08 James J. Feuling Flow system for enhancing undirectional fluid flow
US4589515A (en) * 1984-02-08 1986-05-20 Nissan Motor Company, Limited Exhaust tail pipe arrangement
US5025889A (en) * 1989-08-25 1991-06-25 General Motors Corporation Engine noise reducer
US5016730A (en) * 1990-01-17 1991-05-21 Tolo, Inc. Acoustic filter having acoustic isolation of internal flow element
US5168132A (en) * 1990-04-30 1992-12-01 Christian Beidl Exhaust gas muffler
US5245140A (en) * 1992-04-20 1993-09-14 Wu Kan Chiao Muffler
US5967193A (en) * 1996-05-29 1999-10-19 Calsonic Corporation Flexible pipe unit for use in exhaust pipe line of automotive engine
US5839473A (en) * 1996-06-20 1998-11-24 Camco Manufacturing Inc. RV generator auxiliary exhaust system and method
US6857502B2 (en) * 2001-01-11 2005-02-22 Sankei Kigen Kogyo Kabushiki Kaisya Engine muffler and method of manufacturing the same
US6732509B2 (en) * 2001-10-04 2004-05-11 Yamaha Kabushiki Kaisha Engine acoustical system
US20080308346A1 (en) * 2005-05-18 2008-12-18 Kim Jay S Muffler having fluid swirling vanes
US7552797B2 (en) * 2007-06-15 2009-06-30 Don Emler Vehicular exhaust system
US8083025B2 (en) * 2009-07-31 2011-12-27 Honda Motor Co., Ltd. Silencer provided on exhaust pipe of vehicle engine
WO2015104998A1 (ja) * 2014-01-08 2015-07-16 フタバ産業株式会社 排気消音装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170241311A1 (en) * 2014-09-11 2017-08-24 Faurecia Emissions Control Technologies, Usa, Llc Exhaust Tube and Tuning Tube Assembly with Whistle Reduction Feature
US10634024B2 (en) * 2014-09-11 2020-04-28 Faurecia Emissions Control Technologies, Usa, Llc Exhaust tube and tuning tube assembly with whistle reduction feature
US10961895B2 (en) 2016-01-21 2021-03-30 Futaba Industrial Co., Ltd. Muffler
US11261768B2 (en) 2018-01-26 2022-03-01 Futaba Industrial Co., Ltd. Muffler
US11319847B2 (en) 2018-09-19 2022-05-03 Tenneco Automotive Operating Company Inc. Exhaust device with noise suppression system
US20220186642A1 (en) * 2020-12-16 2022-06-16 Futaba Industrial Co., Ltd. Exhaust pipe

Also Published As

Publication number Publication date
JP6162407B2 (ja) 2017-07-12
CN104903556A (zh) 2015-09-09
JP2014134180A (ja) 2014-07-24
CA2897138A1 (en) 2014-07-17
EP2944783A1 (en) 2015-11-18
EP2944783A4 (en) 2016-08-31
WO2014109192A1 (ja) 2014-07-17

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