EP3118430A1 - Austrittskammer mit einer hauptummantelung und einer teilummantelung, herstellungsverfahren einer solchen kammer - Google Patents

Austrittskammer mit einer hauptummantelung und einer teilummantelung, herstellungsverfahren einer solchen kammer Download PDF

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Publication number
EP3118430A1
EP3118430A1 EP16180891.0A EP16180891A EP3118430A1 EP 3118430 A1 EP3118430 A1 EP 3118430A1 EP 16180891 A EP16180891 A EP 16180891A EP 3118430 A1 EP3118430 A1 EP 3118430A1
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EP
European Patent Office
Prior art keywords
envelope
partial
main
longitudinal
exhaust volume
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
EP16180891.0A
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English (en)
French (fr)
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EP3118430B1 (de
Inventor
Vincent Vurpillot
David Gafforelli
Luc Martin
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.)
Faurecia Systemes dEchappement SAS
Original Assignee
Faurecia Systemes dEchappement SAS
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Publication date
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Priority to EP16180891.0A priority Critical patent/EP3118430B1/de
Publication of EP3118430A1 publication Critical patent/EP3118430A1/de
Application granted granted Critical
Publication of EP3118430B1 publication Critical patent/EP3118430B1/de
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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
    • F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/16—Exhaust treating devices having provisions not otherwise provided for for reducing exhaust flow pulsations
    • 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
    • F01N2260/18—Exhaust treating devices having provisions not otherwise provided for for improving rigidity, e.g. by wings, ribs
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing
    • 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
    • F01N2490/08—Two or more expansion chambers in series separated by apertured walls only

Definitions

  • the invention generally relates to means for reducing acoustic radiation in vehicle exhaust lines.
  • the invention relates in a first aspect to a vehicle exhaust volume, the volume comprising a substantially sealed main envelope internally delimiting an exhaust flow space, and at least a partial envelope pressed against the envelope main, the partial envelope in the developed state being of elongated shape along a longitudinal line and being delimited in a transverse direction substantially perpendicular to the longitudinal line by two opposite side edges to one another, the partial envelope having a given longitudinal length.
  • the limitation of the acoustic radiation of the exhaust lines, including exhaust silencers, is an important point to deal with for the comfort of the passengers of the vehicle, and also for the comfort of the people located in the environment of this vehicle.
  • This acoustic radiation comes mainly from two sources: radiation due to gas excitation, and radiation due to structural excitation.
  • one of the means traditionally used to reduce acoustic radiation is to increase the stiffness of the main envelope, so as to reduce the structural excitation.
  • the stiffening is achieved by creating ribs or bosses in the main envelope.
  • Another possibility is to rigidly fix a sheet on the main envelope, thus creating a local extra thickness.
  • the acoustic radiation from the gas excitation is greatly attenuated.
  • the constant concern of automotive equipment manufacturers is to reduce the weight of the components on board the vehicle. Accordingly, it is desirable to reduce the thickness of the main envelope. This has negative effects vis-à-vis the acoustic radiation. Indeed, it makes emerge strong resonances on thin sheets. This phenomenon is due in particular to the shift of the resonance frequencies towards the low frequencies. Due to the reduction in thickness, the radiation due to the gas excitation is greater, this radiation being less attenuated through the main envelope. The only stiffening of the main envelope does not lead to satisfactory results.
  • the invention aims to provide an exhaust volume in which the acoustic radiation is strongly limited, even when the main envelope is made of a thin sheet.
  • the invention relates to an exhaust volume according to claim 1.
  • the longitudinal section or sections of the partial envelope are free vis-à-vis the main envelope. Under the effect of the structural excitation of the exhaust volume, there is thus a friction between the longitudinal section or sections and the main envelope. This friction dampens the vibrations in the main envelope of the exhaust volume, and therefore reduces the noise due to structural excitation.
  • the exhaust volume has a wall of high total thickness at the partial envelope, which reduces the acoustic radiation due to gaseous excitation.
  • each longitudinal section extends over a longitudinal length greater than 20% of the given longitudinal length.
  • each longitudinal section extends over a longitudinal length greater than 50 mm, preferably greater than 80 mm, more preferably greater than 100 mm.
  • the partial envelope has one or more completely free sections relative to the main envelope, and covering a large area.
  • Each longitudinal section is likely to move relative to the main envelope in all directions, namely longitudinally, transversely, or in all directions forming an angle with the longitudinal and transverse directions.
  • the exhaust volume may also have one or more of the features set forth in dependent claims 2 to 12.
  • the invention relates to an exhaust line comprising an exhaust volume having the above characteristics.
  • the invention relates to a method of manufacturing an exhaust volume as defined in claim 13.
  • the invention relates to a method of manufacturing an exhaust volume as defined in claim 14.
  • the exhaust volume 1 represented on the Figures 1 and 2 is a silencer intended to be inserted in the exhaust line of a vehicle.
  • This vehicle is typically a motor vehicle, for example a car or a truck.
  • the exhaust volume is not a muffler, but is an exhaust gas flow path, or any other body of the exhaust line.
  • the exhaust volume 1 represented on the figure 1 has a substantially sealed main envelope 3 internally defining a space 5 for circulation of the exhaust gases, and a partial envelope 7 pressed against the sealed envelope 3.
  • the exhaust volume 1 comprises an exhaust gas inlet 9 and an outlet 11 of exhaust gas, fluidly communicating with the space 5.
  • the inlet 9 is fluidly connected to the upstream part of the exhaust line , and more specifically, to an exhaust manifold collecting gases leaving the chambers of combustion of the vehicle engine.
  • other equipment such as a turbocharger and purification equipment are interposed between the volume 1 and the exhaust manifold.
  • the outlet 9 is fluidly connected to the downstream portion of the exhaust line, and more specifically, with a cannula through which the purified exhaust gas is released into the atmosphere.
  • the exhaust gases enter the interior of the volume 1 through the inlet 9, circulating in one or more chambers formed inside the volume 1 and exit through the outlet 11.
  • the exhaust volume is of the rolled type. More specifically, the main envelope 3 is rolled around the central axis C. The main envelope 3 then has two axial edges 13, substantially parallel to the central axis C, extending along one of the other. Volume 1 further comprises a rigid attachment 15 of the two axial edges 13 to each other.
  • the attachment 15 is crimping, or welding, or any other type of suitable attachment.
  • the main envelope 3 considered in section perpendicular to the central axis C, has a substantially elliptical shape internally.
  • the main envelope has a circular section, as on the figure 6 , or oval, or substantially polygonal as on the figure 8 , or any other adapted section.
  • the main envelope 3 has a tubular shape, and defines openings at its two opposite axial ends. The openings are closed by end cups 17, 18 rigidly fixed to the main casing 3, for example by crimping.
  • the circulation space 5 is divided into several chambers 19, 21, 23 by internal cups 25, 26. These cups extend in planes substantially perpendicular to the central axis C, and have conjugate shapes of the section internal of the main envelope.
  • the chamber 19 is delimited between the end cup 17 and the inner cup 25, the chamber 21 between the two cups 25, 26, and the chamber 23 between the inner cup 26 and the end cup 18.
  • the inlet 9 and the outlet 11 are formed in the end cup 17.
  • an inlet tube 29 is engaged in the inlet 9. It is parallel to the axis C. It passes entirely through the chamber 19 and opens into the chamber 21.
  • An outlet tube 31 is engaged in the outlet 11. It completely passes through the chambers 19 and 21, and opens into the chamber 23.
  • the internal cups 25, 26 have a multitude of orifices, putting the chambers 19, 21, 23 in fluid communication.
  • the main envelope 3 is arranged such that it comprises, circumferentially around the central axis C, two first faces 33 opposite to one another having a first radius of curvature, and two second opposite faces to each other having a second radius of curvature smaller than the first radius of curvature.
  • the two second faces 35 connect the first two faces 33 to each other.
  • the first faces 33 are of area much greater than the second face 35.
  • the radii of curvature of the first faces 33 and the second faces 35 are constant, or on the contrary are slightly variable. In any event, the radii or radii of curvature of the first faces 33 always remain much greater than the radii of curvature of the second faces 35.
  • the main envelope 3 is a sheet of thickness between 0.2 and 1 mm, preferably between 0.6 and 0.8 mm.
  • it is made of 1.4509 steel. It consists of a single sheet in the sense that it does not have several sheets stacked on top of each other.
  • the partial envelope 7, in the developed state, is of elongated shape along a longitudinal line L materialized on the figure 3 .
  • the longitudinal line L is straight. It defines the direction in which the partial envelope 7 has the largest dimension.
  • the partial envelope 7 is delimited, in a transverse direction substantially perpendicular to the longitudinal line, by two lateral edges 37 opposite one another.
  • the partial envelope 7 has a longitudinal length I given. This length is taken along the line L, that is to say in the longitudinal direction.
  • the side edges 37 are sinusoidal.
  • the side edges 37 are straight and parallel to each other as on the figure 6 , or have any other form.
  • the partial envelope 7 is a sheet of thickness between 0.1 and 0.8 mm, preferably between 0.4 and 0.6 mm.
  • main envelope for example 1.4509 steel.
  • main envelope for example 1.4509 steel.
  • main envelope for example 1.4509 steel.
  • main envelope for example 1.4509 steel.
  • steel 1.4510 is in a different material from that of the main envelope.
  • the partial envelope 7 is devoid of any attachment to the main envelope 3 on at least one longitudinal section 38, the longitudinal section or sections 38 extending from one lateral edge 37 to the other and extending in total over a cumulative developed longitudinal length of not less than 20% of the longitudinal length given, preferably at least 30% of the given lengthwise longitudinal length, more preferably at least 50% of the given longitudinal lengthwise developed.
  • each longitudinal section 38 has a developed longitudinal length greater than 20% of the developed longitudinal length I given, preferably greater than 25% or even 30% of the developed length I given.
  • the partial envelope 7 is arranged such that the longitudinal line L is circumferential around the central axis C.
  • the longitudinal line L extends in a plane perpendicular to the axis C.
  • the partial envelope 7 comprises at least a first longitudinal section 39 of first transverse width and at least a second longitudinal section 41 of second transverse width, less than the first width.
  • the partial envelope 7 comprises two first sections 39, and three second sections 41.
  • the partial envelope 7 is arranged such that the first sections 39 are pressed against the first faces 33 of the main envelope, the second sections 41 being pressed against the second faces 35, which have a smaller radius of curvature.
  • the main envelope 3 and the partial envelope 7 are rolled together.
  • the two opposite longitudinal ends 43 of the partial envelope 7 are rigidly fixed to the main envelope by the attachment 15.
  • the partial envelope 7 remains free with respect to the main envelope over the rest of its longitudinal length. It is fixed to the main envelope 3 only by the fixation 15.
  • the longitudinal section 38 which is completely free and devoid of any fasteners to the main envelope, comprises the first two sections 39, the second section 41 located between the first two sections 39, and the most much of the second sections 41 located between the first sections 39 and the ends 43.
  • the section 38 extends over approximately 90% of the developed longitudinal length L.
  • one or more of the second sections 41 of the partial envelope 7 is rigidly fixed to the main envelope, for example by welding spots 45, materialized on the figure 3 , in addition to fixation 15.
  • the section 41 located circumferentially opposite the fastener 15 is fixed to the main envelope 3.
  • the weld points 45 are placed at one of the second faces 35 of the main envelope. Following the line L, they are located substantially in the middle of the second section 41 which connects the first sections 39 to one another.
  • the partial envelope comprises two longitudinal sections 47 devoid of any fasteners to the main envelope.
  • Each section 47 extends from the soldering points 45 to one of the two longitudinal ends 43.
  • Each section 47 extends over approximately 40% of the given longitudinal length.
  • the two longitudinal sections 47 extend over approximately 80% of the given longitudinal length.
  • FIG 8 illustrates a variant of the first embodiment of the invention. Only those points by which this variant differs from that of Figures 1 to 3 will be detailed below.
  • the partial envelope 7 comprises as many first longitudinal sections 39 as the main envelope 3 of first faces 33, having a large radius of curvature.
  • the first sections 39 are still devoid of attachment to the main envelope 3.
  • the portions of the partial envelope 7 having the largest area remain free to move relative to the main envelope 3 , which increases the friction between the two envelopes.
  • the partial envelope 7 is fixed to the main envelope only by its longitudinal ends 43.
  • one or more of the second sections 41 is rigidly fixed to the main envelope 3, for example by welding spots.
  • the exhaust flow diagram inside volume 1 is different from the scheme used on Figures 1 to 3 .
  • the end cup 17 carries only the inlet 9 of the exhaust gas.
  • the outlet 11 is formed in the end cup 18.
  • the inlet duct 29 passes through the chamber 19 and opens into the chamber 21.
  • the outlet duct 31 extends from the outlet 11 through the chambers 23 and 21 and opens into the chamber 19.
  • the volume of the circulation space 5 in which the gas excitation is the strongest is here also located in the chamber 21.
  • the sections 39 are located along the central axis C , at the level of the chamber 21.
  • the or each partial envelope 7 is a strap, encircling the main envelope 3.
  • the exhaust volume comprises several straps encircling the main envelope 3, as shown in FIGS. Figures 4 and 5 .
  • the straps are axially spaced from one another, typically on a regular basis. For example, the number of straps and the position of the or each strap are selected on the basis of tests, so as to obtain the greatest possible acoustic attenuation.
  • the strap is tightened with a tightening tension between 500 Newton and 3500 Newton. Indeed, too much tightening limits the friction between the turns or between the strap and the main envelope. This results in a significant decrease in vibrational energy dissipation. If the clamping tension on the contrary is too low, the durability of the straps on the main envelope will not be good. Moreover, this will result in metallic contact noises between the main envelope and the strap.
  • the winding of the strap around the main envelope 7 is performed with conventional means, which will not be described here.
  • a first longitudinal end of the strap provides a clip 55, the second longitudinal end of the strap being engaged in the clip 55 and rigidly fixed thereto.
  • the tensioning of the strap is performed by adjusting the precise point of the second longitudinal end which will be rigidly fixed 55.
  • the longitudinal portion of the strap which is devoid of any attachment to the main envelope extends over the entire developed length of the strap.
  • the damping of the structural excitation is by friction of each strap on the main envelope, and also by friction of the different turns of each strap against each other.
  • the main envelope is rolled and its axial edges 13 are rigidly fixed to each other by the attachment 15, which is not visible on the figure 6 .
  • the exhaust volume 1 comprises at least one partial envelope 7, wound around the main envelope 3.
  • the exhaust volume 1 comprises two partially identical partial envelopes 7, axially spaced apart from each other. the other.
  • Each partial envelope 7 has opposite longitudinal ends 43 rigidly fixed to each other by a link 57.
  • the link 57 is of any suitable type.
  • the link 57 is a connection by crimping, or welding, etc.
  • the partial envelope 7 is only one turn of the main envelope.
  • the link 57 is circumferentially offset about the central axis C with respect to the fastener 15 closing the main envelope, typically at an angle of between 30 ° and 330 °.
  • the connection 57 is diametrically opposite, with respect to the central axis C, to the attachment 15.
  • the partial envelope 7 has no rigid attachment to the main envelope.
  • the longitudinal section devoid of any attachment to the main envelope therefore extends over the entire length of the partial envelope.
  • the main envelope 3 has, perpendicular to the central axis C, a circular section. Alternatively, it has an oval section, elliptical, parallelepiped, or any other adapted section.
  • the partial envelope comprises at least one flap 59, folded between the main envelope 3 and the partial envelope 7.
  • an H-cut is made in the partial envelope 7, and two flaps 59 are thus created and folded between the partial envelope 7 and the main envelope 3. After folding the flaps 59, a window 61 is thus formed in the partial envelope 7.
  • the cutout has a shape of C, so that each cut of the partial envelope 7 creates only one shutter 59.
  • two parallel incisions are made on a lateral edge 37 of the partial envelope 7, delimiting between it a flap 59 which can be folded between the partial envelope 7 and the main envelope 3.
  • the partial envelope 7 is placed typically outside the exhaust volume with respect to the main envelope 3.
  • the partial envelope is placed towards the inside of the exhaust volume with respect to the envelope main 3. It is in contact with the exhaust.
  • This variant is adapted in particular to the case where the main envelope 3 and the partial envelope 7 are rolled together.
  • the invention has been described in an application with a main envelope of reduced thickness, preferably less than 1 mm. However, it is also applicable in the case where the main envelope 3 is thicker.
  • the exhaust volume may comprise only a single partial envelope. It may also, alternatively, comprise several partial envelopes, as shown in FIG. figure 4 or again figure 6 .
  • the first longitudinal portion 39 extends circumferentially over the entire width of the first face 33.
  • the second longitudinal sections 41 extend only over a portion of the circumferential width of the first face 33.

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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)
EP16180891.0A 2015-04-20 2015-04-20 Austrittskammer mit einer hauptummantelung und einer teilummantelung, herstellungsverfahren einer solchen kammer Not-in-force EP3118430B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16180891.0A EP3118430B1 (de) 2015-04-20 2015-04-20 Austrittskammer mit einer hauptummantelung und einer teilummantelung, herstellungsverfahren einer solchen kammer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16180891.0A EP3118430B1 (de) 2015-04-20 2015-04-20 Austrittskammer mit einer hauptummantelung und einer teilummantelung, herstellungsverfahren einer solchen kammer
EP15305593.4A EP3085908A1 (de) 2015-04-20 2015-04-20 Schalldämpfer mit einer haupthülle und einer teilhülle und herstellungsverfahren eines solchen schalldämpfers

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP15305593.4A Division-Into EP3085908A1 (de) 2015-04-20 2015-04-20 Schalldämpfer mit einer haupthülle und einer teilhülle und herstellungsverfahren eines solchen schalldämpfers
EP15305593.4A Division EP3085908A1 (de) 2015-04-20 2015-04-20 Schalldämpfer mit einer haupthülle und einer teilhülle und herstellungsverfahren eines solchen schalldämpfers

Publications (2)

Publication Number Publication Date
EP3118430A1 true EP3118430A1 (de) 2017-01-18
EP3118430B1 EP3118430B1 (de) 2017-12-20

Family

ID=53005527

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16180891.0A Not-in-force EP3118430B1 (de) 2015-04-20 2015-04-20 Austrittskammer mit einer hauptummantelung und einer teilummantelung, herstellungsverfahren einer solchen kammer
EP15305593.4A Withdrawn EP3085908A1 (de) 2015-04-20 2015-04-20 Schalldämpfer mit einer haupthülle und einer teilhülle und herstellungsverfahren eines solchen schalldämpfers

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP15305593.4A Withdrawn EP3085908A1 (de) 2015-04-20 2015-04-20 Schalldämpfer mit einer haupthülle und einer teilhülle und herstellungsverfahren eines solchen schalldämpfers

Country Status (5)

Country Link
US (1) US10753243B2 (de)
EP (2) EP3118430B1 (de)
KR (1) KR101986445B1 (de)
CN (1) CN107532499B (de)
WO (1) WO2016169834A1 (de)

Cited By (1)

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EP3798430A4 (de) * 2018-05-22 2021-03-31 Marelli Corporation Schalldämpfer für einen motor

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KR102172684B1 (ko) * 2016-08-18 2020-11-02 제이에프이 스틸 가부시키가이샤 블랭크재의 제조 방법, 블랭크재, 프레스 성형품의 제조 방법 및, 프레스 성형품
EP3527298A1 (de) * 2018-02-19 2019-08-21 Faurecia Systèmes d'Echappement Einheit und herstellungsverfahren eines metallteils, verwendung einer solchen einheit
FR3078001B1 (fr) * 2018-02-19 2020-10-16 Faurecia Systemes Dechappement Procede de fabrication d'une piece metallique agrafee
FR3078000B1 (fr) * 2018-02-19 2020-03-13 Faurecia Systemes D'echappement Ensemble de fabrication d'une piece metallique et utilisation d'un tel ensemble
US11208934B2 (en) 2019-02-25 2021-12-28 Cummins Emission Solutions Inc. Systems and methods for mixing exhaust gas and reductant
US11391195B2 (en) * 2019-06-19 2022-07-19 Tenneco Automotive Operating Company Inc. Exhaust system and muffler
CN110814659A (zh) * 2019-11-18 2020-02-21 四川鑫元瑞科技有限公司 一种汽车消声器的制作方法

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FR2838476A1 (fr) * 2002-04-12 2003-10-17 Faurecia Sys Echappement Volume d'echappement comportant une enveloppe delimitant un passage de circulation des gaz
US20060065480A1 (en) * 2004-09-28 2006-03-30 Leehaug David J Muffler and heat shield assembly
WO2008086513A1 (en) * 2007-01-11 2008-07-17 Federal-Mogul Powertrain, Inc Thermal shield and methods of construction and installation

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EP3798430A4 (de) * 2018-05-22 2021-03-31 Marelli Corporation Schalldämpfer für einen motor

Also Published As

Publication number Publication date
US10753243B2 (en) 2020-08-25
EP3085908A1 (de) 2016-10-26
WO2016169834A1 (fr) 2016-10-27
US20180156088A1 (en) 2018-06-07
CN107532499A (zh) 2018-01-02
EP3118430B1 (de) 2017-12-20
KR20170131522A (ko) 2017-11-29
KR101986445B1 (ko) 2019-06-05
CN107532499B (zh) 2019-12-13

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