EP0523008B1 - Verfahren zur Herstellung einer Vorrichtung zur Schalldämpfung oder katalytischen Behandlung von Abgas - Google Patents

Verfahren zur Herstellung einer Vorrichtung zur Schalldämpfung oder katalytischen Behandlung von Abgas Download PDF

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Publication number
EP0523008B1
EP0523008B1 EP92810513A EP92810513A EP0523008B1 EP 0523008 B1 EP0523008 B1 EP 0523008B1 EP 92810513 A EP92810513 A EP 92810513A EP 92810513 A EP92810513 A EP 92810513A EP 0523008 B1 EP0523008 B1 EP 0523008B1
Authority
EP
European Patent Office
Prior art keywords
wall part
wall
silencer
expanding agent
housing
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
EP92810513A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0523008A1 (de
Inventor
Willem Denis Maria Stuer
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.)
Scambia Industrial Developments AG
Original Assignee
Scambia Industrial Developments AG
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 Scambia Industrial Developments AG filed Critical Scambia Industrial Developments AG
Publication of EP0523008A1 publication Critical patent/EP0523008A1/de
Application granted granted Critical
Publication of EP0523008B1 publication Critical patent/EP0523008B1/de
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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F01N13/185—Mechanical joints the connection being realised by deforming housing, tube, baffle, plate, or parts thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • 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
    • F01N13/14—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 having thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
    • 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
    • F01N2310/00—Selection of sound absorbing or insulating material
    • F01N2310/02—Mineral wool, e.g. glass wool, rock wool, asbestos or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/02—Tubes being perforated
    • 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
    • F01N2470/10—Tubes having non-circular cross section
    • 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
    • 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
    • F01N2490/02—Two or more expansion chambers in series connected by means of tubes
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/08—Surface coverings for corrosion prevention
    • 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
    • F01N2530/00—Selection of materials for tubes, chambers or housings
    • F01N2530/02—Corrosion resistive metals
    • F01N2530/04—Steel alloys, e.g. stainless steel

Definitions

  • the invention relates to a method for producing a device for sound attenuation or catalytic treatment of exhaust gas.
  • the device has an elongated housing which has an outer wall part and an inner wall part, the two wall parts being connected to one another at the two ends of the housing and possibly to an end wall.
  • the method can be used, for example, to produce a device that forms a silencer or catalytic converter and that serves as part of an exhaust system of an internal combustion engine and that is connected to the exhaust gas outlet of such an engine.
  • a known and intended for installation in the exhaust pipe of an internal combustion engine has an elongated, generally cylindrical and cross-sectionally double-walled housing, the two wall parts of which abut each other almost without play.
  • the pulsating gas flows contained in the exhaust gas flow are smoothed in the silencer, so that the intake and exhaust noises of the internal combustion engine are dampened. This is achieved by having the exhaust gas flow through at least a chamber and / or at least one perforated exhaust pipe, which is covered with a sound-absorbing material, is passed through.
  • two pieces of sheet metal which have a thickness of 0.5 mm, are placed one above the other and bent to the longitudinal wall.
  • At least one exhaust pipe and the sound-absorbing material are inserted into the housing. Afterwards, the edges of the two wall parts running along a surface line are folded together to form a longitudinal flange and connected at their ends to one another and to an end wall.
  • a second known muffler which differs only slightly from the muffler described above and is produced by the same method, has a space between the two wall parts.
  • the wall parts are kept at a distance by a glass fiber layer between them, the radial distance between the outer surface of the inner wall part and the inner surface of the outer wall part normally being about 1 mm to 2 mm.
  • the glass fiber layer improves the sound and heat insulation of the silencer. However, this improvement is only slight, since the glass fiber layer used to improve the insulation is very thin and has a relatively high thermal conductivity. In addition, the glass fiber layer is relatively expensive.
  • Another silencer is known from JP-A-6 296 720, which forms the closest prior art.
  • This silencer has a housing with an inner wall part and an outer wall part.
  • the two wall parts are connected to each other at the two ends of the housing and are at least in places at a distance from one another, a heat-insulating material being arranged between the outer wall part and the inner wall part, which also serves, inter alia, to enlarge the space between the two wall parts and optimally brace the latter to avoid housing vibrations and the associated noise when using the muffler.
  • the above-mentioned space of this silencer is - as already mentioned - filled with a heat-insulating material.
  • the invention is based on the object of developing a method with which a double-walled device forming a silencer or catalytic converter can be produced, which in turn does not have the disadvantages of the above-described silencers and also essentially only Has air-filled space between the two wall parts.
  • the device shown in Figures 1 to 3 forms a silencer 1 and has a housing with a horizontal axis 2.
  • the muffler 1 is provided for installation in the exhaust system of an internal combustion engine and can be connected, for example, directly or via a catalytic converter to the exhaust gas outlet of an internal combustion engine.
  • the housing of the muffler 1 has a wall with an elongated, sleeve-like, generally cylindrical and in cross section more or less circular longitudinal wall 3, which has an outer wall part 4 and an inner wall part 5.
  • the wall also includes two end walls 6 arranged at both ends of the longitudinal wall 3.
  • One end wall has an exhaust gas inlet 7 which serves to supply the exhaust gas and the other end wall has an exhaust gas outlet 8 which serves to convey the exhaust gas.
  • the interior 9 of the muffler 1 is divided into three areas by two intermediate walls 10, the central interior area designed as a hollow chamber being connected to the inlet 7 and the outlet 8 by a perforated exhaust pipe 11.
  • the two exhaust pipes 11 each pierce an intermediate wall 10 and an end wall 6 and are in the two outer areas of the interior 9 by a sound-absorbing material 12, which consists for example of rock wool and / or basalt wool.
  • the two wall parts 4 and 5 of the silencer 1 are firmly connected to one another along a surface line by a longitudinal flange 14 and at their ends also to one another and to the end walls 6 by an end flange 15. It should be noted here that the walls in FIGS. 1 to 3 and also in the other figures still described are drawn with disproportionate thickness for reasons of drawing.
  • two flat pieces of sheet metal are first cut to the desired size of the longitudinal wall 3. These sheet metal pieces used to form the two wall parts 4 and 5 have a thickness of 0.5 mm to 1.5 mm. To produce a silencer 1 two pieces of sheet metal are preferably used, which are of the same thickness. However, there is also the possibility that the sheet metal piece used to form the inner wall part 5 can be somewhat thinner than the sheet metal piece used to form the outer wall part 4.
  • a blowing agent 13 is applied in a more or less flowable, at least pasty state to the outer surface of the inner wall part 5 and / or to the inner surface of the sheet metal piece forming the outer wall part 4.
  • the blowing agent 13 can consist, for example, of a dispersion with a dispersing agent and a plastic-containing material which is dispersed therein and is obtainable under the name "microbeads" from the company LEHMANN & FOSS & CO, Hamburg, Germany, and which expands when heated and thereby a 40 to Experiences 70-fold increase in volume.
  • the blowing agent contains 5% by weight to 20% by weight of the dispersed material and is applied with a layer thickness of at least 0.1 mm.
  • the partition walls 10, the exhaust pipes 11 and the sound-absorbing material 12 are used during or after the bending.
  • the intermediate walls 10 are designed as disks and have an angled edge area on the outside and on the holes 10a. These edge regions rest on the inner wall part 5 or on the exhaust pipes 11 and can form a press connection with them and / or be spot welded, for example.
  • the ends of the two wall parts 4 and 5 running along a surface line are pressed together and folded over to form a longitudinal flange 14, shown in simplified form in FIG. 3, and possibly also spot welded to one another.
  • the two wall parts 4 and 5 come via the propellant 13 lying between them, preferably with at most little play and, if possible, almost free of play and snugly to lie against each other.
  • the end walls 6 are placed on the partially protruding exhaust pipes 11 put on.
  • the end walls 6, like the intermediate walls 10, are designed as disks and have an angled edge area on the outside and on the holes 6a. The outer edge area is then folded with the wall parts 4 and 5 to form an end flange 15 and pressed with them, and possibly additionally welded at certain points.
  • the end walls 6 and also the intermediate walls 10 consist of metal pieces which preferably have a thickness of 1.5 to 2.5 mm.
  • the blowing agent 13 is heated to a temperature of at least 80 ° C., preferably at least 100 ° C. and for example 120 ° C. to 140 ° C.
  • the blowing agent 13 is thereby foamed and expanded. It creates a pressure by which the inner wall part 5 is indented in places, so that it takes on the shape shown in FIGS. 2 and 3. This means that in each area between two adjacent walls 6 and 10 or 10 and 10 there is an intermediate space 16 between wall parts 4 and 5, the inner wall part 5 with the end walls 6, the intermediate walls 10 and the longitudinal flange 14 still on the outer wall part 4 is present.
  • the greatest radial distance h between the outer surface of the inner wall part 5 and the inner surface of the outer wall part 4 is at least 3 mm and for example approximately 6 mm.
  • the spaces 16 are initially filled with foamed blowing agent 13.
  • the silencer 1 is now preferably heated to a temperature of at least 300 ° C. and, for example, 400 ° C. after the inner wall part 5 has been lodged. By this additional heating the propellant 13 is burned at least in part. After the blowing agent 13 has been burned, the interstices 16 contain at most only small amounts of the ash formed during the burning, that is to say practically no solid material.
  • the heating of the muffler, and in particular of the propellant 13 present between its wall parts 4 and 5, which serves to lodge the inner wall part 5 takes place, for example, in a workshop of the manufacturing plant.
  • the muffler in the exhaust system of an internal combustion engine in its state shown in FIG.
  • the indentation of the inner wall part 5 and also the combustion of the propellant 13 is then triggered by the hot exhaust gas.
  • the muffler shown in FIGS. 4, 5 and 6, designated as a whole by 23, also has an elongated shape and has a housing which is formed by two identical shells, namely a first, lower shell 24 and a second, upper shell 25, each of which has an outer wall part 26 and an inner wall part 27.
  • the shells 24 and 25 have two semicircular, outwardly projecting sections 24a and 25a at their ends. These sections 24a and 25a form in pairs a collar-shaped and circular opening 28.
  • the shells 24 and 25 or their wall parts 26 and 27 also have their elongated Edge regions also project outward, abutting and welded together wall sections 30.
  • the interior of the housing is designed exactly the same as the interior of the silencer 1 shown in Figures 1 to 3 and has two exhaust pipes 29 which penetrate the circular openings 28 and are possibly welded to the outwardly projecting sections 24a, 25a of the housing.
  • the spaces 31 in the wall of the silencer 23 can be produced by the method described with reference to FIGS. 1 to 3.
  • the visible and invisible wall parts or walls of the silencers can be made of stainless steel and may have a thin aluminum coating.
  • a device serving as a catalyst can have a housing similar to that of the mufflers previously described with reference to FIGS. 1 to 6.
  • a housing consisting of two half-shells of the type shown in FIGS. 4 to 6 is particularly expedient.
  • the two half-shells can together form an essentially cylindrical, cross-sectionally circular or oval or elliptical jacket.
  • the housings can then contain at least one catalyst body with passages, the boundary surfaces of which are coated with a catalytically active material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Catalysts (AREA)
EP92810513A 1991-07-08 1992-07-06 Verfahren zur Herstellung einer Vorrichtung zur Schalldämpfung oder katalytischen Behandlung von Abgas Expired - Lifetime EP0523008B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH201591 1991-07-08
CH2015/91 1991-07-08

Publications (2)

Publication Number Publication Date
EP0523008A1 EP0523008A1 (de) 1993-01-13
EP0523008B1 true EP0523008B1 (de) 1996-09-18

Family

ID=4223912

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92810513A Expired - Lifetime EP0523008B1 (de) 1991-07-08 1992-07-06 Verfahren zur Herstellung einer Vorrichtung zur Schalldämpfung oder katalytischen Behandlung von Abgas

Country Status (7)

Country Link
EP (1) EP0523008B1 (fi)
AT (1) ATE143094T1 (fi)
CA (1) CA2072947A1 (fi)
DE (1) DE59207166D1 (fi)
DK (1) DK0523008T3 (fi)
ES (1) ES2092665T3 (fi)
GR (1) GR3021076T3 (fi)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10975743B1 (en) 2020-03-13 2021-04-13 Tenneco Automotive Operating Company Inc. Vehicle exhaust component
US11199116B2 (en) 2017-12-13 2021-12-14 Tenneco Automotive Operating Company Inc. Acoustically tuned muffler
US11268430B2 (en) 2019-01-17 2022-03-08 Tenneco Automotive Operating Company Inc. Diffusion surface alloyed metal exhaust component with welded edges
US11268429B2 (en) 2019-01-17 2022-03-08 Tenneco Automotive Operating Company Inc. Diffusion surface alloyed metal exhaust component with inwardly turned edges
US11365658B2 (en) 2017-10-05 2022-06-21 Tenneco Automotive Operating Company Inc. Acoustically tuned muffler
US11702969B2 (en) 2017-10-05 2023-07-18 Tenneco Automotive Operating Company Inc. Acoustically tuned muffler

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7293628B2 (en) 2004-05-17 2007-11-13 Calsonic Kansei Corporation Shell main body for muffler
DE102004048561A1 (de) * 2004-10-04 2006-04-20 Thyssenkrupp Steel Ag Rohrelement und Verwendung eines solchen Rohrelements
DE102005002290A1 (de) * 2005-01-17 2006-07-27 J. Eberspächer GmbH & Co. KG Schalldämpfer
FR2925584B1 (fr) * 2007-12-21 2014-06-20 Faurecia Sys Echappement Element d'echappement pour le traitement acoustique des gaz d'echappement
DE102008006401A1 (de) 2008-01-28 2009-07-30 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Abgasschalldämpfers und Abgasschalldämpfer
DE102019132097A1 (de) 2019-11-27 2021-05-27 Eberspächer Exhaust Technology GmbH Abgasschalldämpfer

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Publication number Priority date Publication date Assignee Title
US2761525A (en) * 1950-07-26 1956-09-04 Walker Mfg Company Of Wisconsi Muffler
US3209787A (en) * 1962-03-26 1965-10-05 Walker Mfg Co Exhaust system
US3945460A (en) * 1974-09-03 1976-03-23 Arvin Industries, Inc. Muffler with rupture control means
US4404992A (en) * 1980-09-09 1983-09-20 Nippon Steel Corporation Composite dual tubing
DE3920600A1 (de) * 1989-06-23 1991-01-10 Audi Ag Verfahren zum herstellen eines heissgase fuehrenden, doppelwandigen rohres
EP0431649B1 (de) * 1989-12-07 1992-10-14 V.W. WERKE VINCENZ WIEDERHOLT GMBH & CO KG Verfahren zur Herstellung eines Doppelrohres, insbesondere für katalysatorbestückte Abgasanlagen von Brennkraftmaschinen.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11365658B2 (en) 2017-10-05 2022-06-21 Tenneco Automotive Operating Company Inc. Acoustically tuned muffler
US11702969B2 (en) 2017-10-05 2023-07-18 Tenneco Automotive Operating Company Inc. Acoustically tuned muffler
US11199116B2 (en) 2017-12-13 2021-12-14 Tenneco Automotive Operating Company Inc. Acoustically tuned muffler
US11268430B2 (en) 2019-01-17 2022-03-08 Tenneco Automotive Operating Company Inc. Diffusion surface alloyed metal exhaust component with welded edges
US11268429B2 (en) 2019-01-17 2022-03-08 Tenneco Automotive Operating Company Inc. Diffusion surface alloyed metal exhaust component with inwardly turned edges
US10975743B1 (en) 2020-03-13 2021-04-13 Tenneco Automotive Operating Company Inc. Vehicle exhaust component

Also Published As

Publication number Publication date
ES2092665T3 (es) 1996-12-01
CA2072947A1 (en) 1993-01-09
DK0523008T3 (fi) 1997-03-03
GR3021076T3 (en) 1996-12-31
ATE143094T1 (de) 1996-10-15
DE59207166D1 (de) 1996-10-24
EP0523008A1 (de) 1993-01-13

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