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EP0736674B1 - Elément d'absorption de laine minérale pour isolation acoustique dans un silencieux d'échappement, pièce pour celui-ci, son utilisation et son procédé de fabrication - Google Patents

Elément d'absorption de laine minérale pour isolation acoustique dans un silencieux d'échappement, pièce pour celui-ci, son utilisation et son procédé de fabrication Download PDF

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Publication number
EP0736674B1
EP0736674B1 EP96105287A EP96105287A EP0736674B1 EP 0736674 B1 EP0736674 B1 EP 0736674B1 EP 96105287 A EP96105287 A EP 96105287A EP 96105287 A EP96105287 A EP 96105287A EP 0736674 B1 EP0736674 B1 EP 0736674B1
Authority
EP
European Patent Office
Prior art keywords
absorption member
accordance
board
inner pipe
mineral wool
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
EP96105287A
Other languages
German (de)
English (en)
Other versions
EP0736674A1 (fr
Inventor
Fridolin Bissinger
Dirk Ottstadt
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.)
Saint Gobain Isover G+H AG
Original Assignee
Gruenzweig und Hartmann 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 Gruenzweig und Hartmann AG filed Critical Gruenzweig und Hartmann AG
Publication of EP0736674A1 publication Critical patent/EP0736674A1/fr
Application granted granted Critical
Publication of EP0736674B1 publication Critical patent/EP0736674B1/fr
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
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/084—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the exhaust gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric 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
    • 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
    • F01N2310/00—Selection of sound absorbing or insulating material
    • F01N2310/02—Mineral wool, e.g. glass wool, rock wool, asbestos or the like

Definitions

  • the invention concerns an absorption member made up of bound mineral wool for acoustic insulation inside an exhaust muffler, particularly of a motor car, in accordance with the preamble of claim 1, a part therefor in accordance with claim 10, as well as a method for producing it in accordance with claim 11.
  • Exhaust mufflers or silencers of the type provided in any automobile are often filled with mineral wool as a sound absorbing material.
  • the inner pipe channelling the exhaust gas flow is perforated at its periphery to introduce the pressure pulsations of the exhaust gas flow into the sound absorbing mineral wool material.
  • the mineral wool material is in many cases covered by a metal wool layer at the periphery of the inner pipe in order to prevent mineral fibers from being ripped loose in a considerable amount under the impact of the pulsations and emitted into the environment, whereby acoustic insulation would, of course, be impaired.
  • the exhaust pipe either simply extends rectilinearly through the muffler, or branches into a plurality of inner pipes, or widens to an inner pipe having the shape of an inner tray, or else extends along a curved axis such as to e.g. include bends covering a range of 180°.
  • This variety of demanded shapes makes correspondingly varied demands to the properties of the acoustic insulation filling.
  • Such shaped articles can then be pre-fabricated in several parts, with the parts being correspondingly joined together to form the complete absorption member in the course of installation.
  • Such a construction of the absorption members from constituent parts is required whenever the constructional peculiarities of the muffler make slipping the absorption member onto the inner pipe system in an axial direction impossible, either due to curvatures of the inner pipe, or due to webs or intermediate walls present between the inner pipe system and the muffler housing.
  • a particular difficulty in installing the absorption member having the form of a shaped body constituted by opposing parts results whenever the inner pipe system of the muffler is constituted of three or more inner pipes not contained in a common plane.
  • Such a situation forms the basis for the generic prior art disclosed in DE 90 12 260 U.
  • the reason why the parts cannot encompass the inner pipes and fill the entire internal cavity without gaps resides in the fact that to this end, those portions of the parts intended to go around the rear of the inner pipes would have to be strongly compressed during installation to fit through the gap formed with adjacent pipes.
  • the invention is based on the object of furnishing an absorption member which permits complete filling of the space between the inner pipes with cured mineral wool material in the case of an assembly of parts mounted in a lateral direction, i.e. in a transverse direction with respect to the muffler axis, even in the case of a muffler having three parallel inner pipes not contained in a common plane, without having to resort to laborious subsequent stuffing work or the like.
  • the plate-shaped design of the absorption member or of each respective part avoids local stress peaks and favors without any additional measures such a comparatively homogeneous distribution of the deformation over the periphery of the central passage.
  • the fact that the thickness of each part is limited as a result enables easy manipulation during installation even by untrained workers, without dedicated tools being necessary and without damages having to be feared.
  • the part is produced of a traditional mineral fiber board which is manufactured by depositing mineral fibers provided with binding agent on a production conveyor, compressing them to the desired bulk density, and curing them in this compacted form as defined in claim 11.
  • a traditional mineral fiber board thus produced, the great majority of fibers are arranged in planes in parallel with the plane of the production conveyor. If the part is produced by cuts perpendicular with the major surfaces of a board thus produced, then a particularly good strength of the mineral wool material at the periphery of the central passage is obtained as a result, whereby damages impairing its function during bending open the parting slit around a bending axis perpendicular with the board plane are avoided.
  • the fiber orientation in a transversal direction with respect to the bending axis inside the board reduces the risk of local destruction of the fiber compound and ensures maintaining good resilience.
  • the preferable design of the absorption members or parts as punched members makes simple and low-dust production possible.
  • deformability in this location may selectively be assisted by a stress-reducing slit in the peripheral wall of the central passage located opposite the parting slit.
  • the depth of the stress-reducing slit also determines the extent in which the material located on the side opposite the parting slit becomes involved in the deformation to thus selectively reduce the required deformation path along the remaining peripheral edges of the central passage.
  • Shaped articles wherein the mineral wool provided with yet uncured binding agent is brought into the desired three-dimensional shape and cured in this shape typically present binding agent contents of distinctly more than 2 % wt. dry. Thus even exposed locations of the shaped article can be given sufficient strength.
  • an absorption member of the invention is, however, produced to have a binding agent content of less than 2 % wt. dry or lower, as is also common in manufacturing mineral wool boards for construction purposes or the like. Owing to the board shape or, in the preferred case, by manufacturing the absorption member from a traditional board, stress peaks at exposed locations are avoided with respect to the rather two-dimensional shape, permitting working with lower contents of binding agent.
  • board-type shaped sections having limited thicknesses in accordance with claim 5, particularly having thicknesses of less than 10 cm, preferably less than 8 cm and particularly less than 6 cm, on the one hand permits simple handling during installation by bending open at the parting slit, and on the other hand permits producing the sections by punching which is preferred over ways of processing whereby chips or particles would be released.
  • each part is associated with an inner pipe to which it can be attached by snapping on.
  • the dividing line intersects the third inner pipe, preferably in the axis thereof.
  • the parts are in accordance with claim 8 pre-fabricated to cohere to each other while being delimited from each other by a dividing line. In this manner it is ensured that the respective correct and fitting parts are available at the time of installation without the risk of mistakes and can safely be installed free of errors. If, in accordance with claim 9, the dividing line is formed by a non-continuous punched cut in the manner of a perforation, the cohering parts can be snapped apart in a single motion and installed separately without increased production expenses being necessary.
  • the parts may, however, also be manufactured separately and supplied as independently marketable products as claimed in accordance with claim 10.
  • Such parts may be used according to the invention to form absorption members for mufflers including at least three inner pipes which are not comprised in a common plane.
  • Fig. 1 shows an example of a muffler 2 to be insulated by means of absorption members according to the invention.
  • the muffler 2 comprises a muffler housing 4 in turn comprised of peripheral wall portions 6 and 8 which are welded or crimped together at their edges such as to form a peripherally closed housing shell, and of associated front wall portions 10 and 12 including an exhaust gas inlet pipe 14 and an exhaust gas outlet pipe 16, respectively.
  • Exhaust gas from a combustion engine not shown here, particularly from the engine of a motor car is conveyed to the space enclosed by the peripheral wall constituted by peripheral wall portions 6 and 8 via the exhaust gas inlet pipe 14 and again discharged from muffler 2 by means of the exhaust gas outlet pipe 16 on the opposite side.
  • an inner pipe assembly comprehensively shown under 18 is provided, which in an exemplary case is constituted of three inner pipes 20, 22 and 24 in parallel arrangement which are secured in their respective positions by means of three intermediate walls 26, 28 and 30 inside the inner cavity of the muffler housing 4.
  • the outer circumference of intermediate walls 26, 28 and 30 has a contour conforming with the periphery of the muffler housing 4, such that the intermediate walls 26, 28 and 30 subdivide the inner cavity of the muffler housing 4 into chambers 32, 34, 36 and 38 which are peripherally insulated with respect to each other.
  • the exhaust gas is initially introduced by the exhaust gas inlet pipe 14 of the front wall portions 10 into the inner pipe 24, which is peripherally closed in the range of chamber 32 (hidden from view in the drawing) and provided with a peripheral perforation 25 in the range of chambers 34 and 36.
  • the perforation 25 the exhaust gas enters into chambers 34 and 36 acting as absorption chambers in a generally known manner in interaction with absorption members 40 and 42 to thereby lose part of its sound or pulsation energy.
  • the exhaust gas passes from the inner pipe 24 into the chamber 38 positioned opposite the entry side and formed as a reflection chamber.
  • a further part of the sound energy is annihilated as a result of reflection phenomena.
  • the exhaust gas then enters into the inner pipe 22 provided at its outer periphery with a perforation 23 wherethrough in turn sound energy is annihilated inside absorption chambers 34 and 36. From the inner pipe 22 the exhaust gas then enters into reflection chamber 32 located opposite reflection chamber 38, where sound energy is again annihilated by reflection. From the reflection chamber 32 the exhaust gas flow finally enters into the inner pipe 20 entirely closed at its periphery, which is extended downstream along the last intermediate wall 26 and merges into the exhaust gas outlet pipe 16 of the muffler housing 4.
  • the absorption chambers 34 and 36 are filled up with the respective absorption members 40 and 42 made up of bound mineral wool which consequently have to receive the inner pipe assembly 18 in the area of absorption chambers 34 and 36.
  • the outer contour of absorption members 40 and 42 conforms with the contour of the muffler housing 4, with inner pipes 20, 22 and 24 being received in associated recesses 44, 46 and 48 of respective absorption members 40 and 42.
  • a mechanically resistant, however acoustically permissive protection layer e.g. comprised of metal wool may be arranged in a generally known manner at the inner periphery of recesses 46 and 48. In the range of the recesses 44 this is not necessary in the present example as they receive the non-perforated inner pipe 20 and are therefore not exposed to stresses by the exhaust gas flowing inside inner pipe 20.
  • the very arrangement of intermediate walls 26, 28 and 30 precludes axial slipping on of absorption members 40 and 42. Installation on the inner pipe assembly 18 in a lateral direction, i.e. in a radial direction instead of axially, is therefore necessary.
  • absorption members 40 and 42 are constituted of respective parts 40a and 40b or 42a and 42b abutting in the installed position at their dividing lines or cut surfaces 50.
  • the recess 44 for the inner pipe 20 is centrally divided by the dividing line or cut surface 50, resulting in two semicircular depressions respectively associated with parts 40a and 40b or 42a and 42b which encompass the inner pipe 20 from two sides.
  • the recesses 46 and 48 in turn are designed as peripherally closed central passages receiving the inner pipes 22 and 24 entirely inside each respective part 40a and 40b or 42a and 42b.
  • the recesses 46 and 48 are provided with a respective parting slit 47 or 49 extending towards the outside of respective associated parts 40a and 40b or 42a and 42b, through which the respective inner pipes 22 and 24 can pass when installing the respective parts 40a and 40b or 42a and 42b.
  • the parts 40a and 40b as well as 42a and 42b, i.e. the absorption members 40 and 42 include parallel major surfaces 52 in a perpendicular direction with respect to the cut surfaces and thus basically have a board-type shape.
  • the board thickness i.e. the width of absorption members 40 and 42 is limited.
  • each absorption member 40 or board-type shaped section 41 thereof, respectively is represented in further detail.
  • each absorption member 40 or board-type shaped section 41 thereof, respectively is pre-fabricated in the case of the depicted example to have the entire contour of absorption member 40, and the outer contour can be produced by punch-cutting.
  • the recess 44 for the non-perforated inner pipe 20, which is made up of semicircular depressions of the single parts 40a and 40b, is produced by means of corresponding punching tools.
  • each part 40a and 40b formed as recesses 46 and 48 together with parting slits 49 and cut surface or dividing line 50 are equally produced in a single work step by means of a corresponding punching tool.
  • the dividing line 50 comprises a portion 51 wherein only a non-continuous punched cut has been produced, such that the parts 40a and 40b following their production initially remain connected to each other. Only during installation, the two material webs represented under 51a are manually destroyed in the range of portion 51 of the dividing line or cut surface 50 by bending open the dividing line 50 between parts 40a and 40b, resulting in separate parts 40a and 40b as represented in Fig. 1.
  • part 40a a view of which is again represented in Fig. 3, is obtained.
  • the installation of part 40a is shown in detail in Fig. 4.
  • the material is bent open at the periphery of recess 46. This results in a deformation distributed more or less homogeneously over the entire peripheral range of recess 46 and thus including the entire material in this location in the absence of excessive stress peaks.
  • the deformation succeeds despite the relatively great deformation path in the absence of any excessive stress peaks and thus largely of any destruction to the structure of the bound mineral wool, such that the edges of parting slit 49 resiliently return after the part 40a has been installed on the inner pipe 22 in the representation of Fig.
  • FIG. 5 schematically shows production of absorption members 40 and 42 or of respective board-type shaped sections 41 herefor.
  • a conventional fiberising unit not shown here such as e.g. a fiberising rotor, in cooperation with suitable gas flows generates a gas flow 202 which comprises cooling fibers and is channelled into a chute 204 where the fibers are sprayed with binding agent through nozzles 206.
  • the fibers thus provided with uncured binding agent arrive at the bottom of chute 204 on a production conveyor 208 on which they are deposited under low pressure and form a mat 212 as they approach the exit 210 from the chute 204.
  • Compression of mat 212 to the desired final thickness and concurrent curing of the binding agent takes place inside a tunnel furnace 214, such that the material exits from the tunnel furnace 214 having the form of a continuous board 216 with a desired height and bulk density.
  • the continuous board 216 is then supplied to a punching device 218 wherein punching tools 220 in a manner known per se produce e.g. the board section 41 shown in Fig. 2 or, if the installation space has a small width, an entire absorption member 40 including all the cuts with a perpendicular orientation with respect to the major surfaces 52.
  • the used punching tool 220 is provided in the area of portion 51 of the cut surface 50 including gaps 222, such that corresponding material webs 51a connecting the parts 40a and 40b remain between the cut surfaces until the time of installation. It is thereby ensured that mistakes do not occur during installation and that the respective parts are always ready at hand when they are required for installation.

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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)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Claims (12)

  1. Elément d'absorption (40, 42) constitué de laine minérale liée,
    pour isolation acoustique à l'intérieur d'un silencieux d'échappement (2), en particulier d'une automobile, qui comporte au moins trois tuyaux intérieurs (20, 22, 24) agencés en parallèle les uns aux autres et qui ne sont pas inclus dans un plan commun,
    ayant un contour extérieur qui correspond à la périphérie de l'enveloppe (4) du silencieux, et
    ayant des cavités (44, 46, 48) qui correspondent aux tuyaux intérieurs (20, 22, 24) à recevoir,
    et ledit élément d'absorption étant constitué de parties (40a, 40b, 42a, 42b) qui peuvent être installées sur lesdits tuyaux intérieurs (20, 22, 24) dans une direction latérale de manière à former conjointement l'élément d'absorption (40, 42) recevant lesdits tuyaux intérieurs (20, 22, 24) dans lesdites cavités,
    caractérisé
    par le fait d'être formé en tant qu'article ayant une forme du type planche, en particulier un élément poinçonné ayant des surfaces principales parallèles (52),
    par la formation d'au moins une desdites cavités (46, 48) dans au moins une desdites parties (40a, 40b, 42a, 42b) en tant que passage central au moins approximativement entièrement fermé ayant un contour adapté à la périphérie d'un tuyau intérieur associé (22, 24), et
    par une fente de séparation (47, 49) s'étendant dans le matériau de ladite partie depuis ladite au moins une cavité (46, 48) formée en tant que passage central jusqu'à l'extérieur de ladite partie (40a, 40b, 42a, 42b).
  2. Elément d'absorption selon la revendication 1, caractérisé en ce que le bord dudit passage central comporte une fente de réduction de contrainte sur son côté opposé à ladite fente de séparation (47, 49).
  3. Elément d'absorption selon la revendication 1 ou 2, caractérisé par une teneur en agent de liaison de 2 % en poids de matière sèche ou moins.
  4. Elément d'absorption selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il est assemblé à partir d'une pluralité de tronçons ayant une forme du type planche (41) agencés en juxtaposition.
  5. Elément d'absorption selon la revendication 4, caractérisé en ce que chacun desdits tronçons ayant une forme du type planche (41) a une épaisseur inférieure à 10 cm, de préférence inférieure à 8 cm, et en particulier inférieure à 6 cm.
  6. Elément d'absorption selon l'une quelconque des revendications 1 à 5, caractérisé en ce que, dans le cas de trois tuyaux intérieurs (20, 22, 24), deux parties (40a, 40b et 42a, 42b) sont formées ayant une ligne séparatrice (50) qui passe entre deux tuyaux intérieurs (22, 24).
  7. Elément d'absorption selon la revendication 6, caractérisé en ce que ladite ligne séparatrice (50) coupe ledit troisième tuyau intérieur (20) de préférence dans son axe.
  8. Elément d'absorption selon l'une quelconque des revendications 1 à 7, caractérisé en ce que lesdites parties (40a, 40b et 42a, 42b) sont préfabriquées pour s'assembler l'une à l'autre tout en étant délimitées l'une de l'autre par une ligne séparatrice (50).
  9. Elément d'absorption selon la revendication 8, caractérisé en ce qu'au moins une partie (50 ou 51) de ladite ligne séparatrice est formée par une découpe poinçonnée non-continue du type perforation.
  10. Partie (40a, 40b, 42a, 42b) pour l'élément d'absorption (40, 42) selon la revendication 1, ladite partie ayant au moins une cavité (46, 48) en tant que passage central au moins partiellement entièrement fermé et ayant un contour adapté à la périphérie d'un tuyau intérieur associé (22, 24), et ladite partie ayant également une fente de séparation (47, 49) s'étendant dans le matériau de ladite partie depuis ladite cavité (46, 48) formé en tant que passage central jusqu'à l'extérieur de ladite partie (40a, 40b, 42a, 42b).
  11. Procédé de production d'un élément d'absorption (40, 42) selon la revendication 1 ou d'une partie (40a, 40b, 42a, 42b) de celui-ci selon la revendication 10, respectivement,
    caractérisé par les étapes consistant à
    déposer des fibres minérales (202) munies d'un agent de liaison sur un convoyeur de production (208) et compacter et faire durcir par la suite le matelas de fibres résultant (212) pour produire une planche de laine minérale (216),
    et poinçonner à partir de ladite planche de laine minérale (216) lesdits éléments d'absorption (40, 42) ou parties (40a, 40b, 42a, 42b) de ceux-ci, respectivement, incluant lesdites cavités (44, 46, 48) et fentes (47, 49).
  12. Procédé selon la revendication 11, caractérisé en ce que dans la zone constituée de ladite ligne séparatrice (50) entre des parties (40a, 40b, 42a, 42b) appartenant à un élément d'absorption (40, 42), un outil de poinçonnage non-continu (220) est utilisé pour produire une partie perforée (51).
EP96105287A 1995-04-03 1996-04-02 Elément d'absorption de laine minérale pour isolation acoustique dans un silencieux d'échappement, pièce pour celui-ci, son utilisation et son procédé de fabrication Expired - Lifetime EP0736674B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19512438A DE19512438A1 (de) 1995-04-03 1995-04-03 Absorptionsteil aus Mineralwolle zur Schalldämpfung in einem Abgasschalldämpfer, Teilstück hierfür, dessen Verwendung und Verfahren zu seiner Herstellung
DE19512438 1995-04-03

Publications (2)

Publication Number Publication Date
EP0736674A1 EP0736674A1 (fr) 1996-10-09
EP0736674B1 true EP0736674B1 (fr) 2000-03-22

Family

ID=7758658

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96105287A Expired - Lifetime EP0736674B1 (fr) 1995-04-03 1996-04-02 Elément d'absorption de laine minérale pour isolation acoustique dans un silencieux d'échappement, pièce pour celui-ci, son utilisation et son procédé de fabrication

Country Status (7)

Country Link
EP (1) EP0736674B1 (fr)
AT (1) ATE191059T1 (fr)
CZ (1) CZ90796A3 (fr)
DE (2) DE19512438A1 (fr)
HU (1) HUP9600796A3 (fr)
PL (1) PL313581A1 (fr)
SI (1) SI9600111A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7278473B2 (en) 2002-06-25 2007-10-09 Behr Gmbh & Co. Exhaust gas heat exchanger and method for the production thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113153506B (zh) * 2021-05-25 2022-09-13 佛吉亚(柳州)排气控制技术有限公司 一种便于拆卸安装的汽车消声器结构

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2072961A (en) * 1934-03-01 1937-03-09 Burgess Lab Inc C F Silencer
DE3826707A1 (de) * 1988-08-05 1990-02-08 Gruenzweig & Hartmann Verfahren zum herstellen eines abgas-schalldaempfers
DE9012260U1 (de) * 1990-08-25 1990-11-08 Mussbach Metall Hackelsberger GmbH & Co, 6730 Neustadt Absorptionsformkörper für Abgasanlagen von Kraftfahrzeugen
DE9401674U1 (de) * 1994-02-02 1994-04-21 Fa. J. Eberspächer, 73730 Esslingen Schalldämpfer, insbesondere Abgasschalldämpfer, für ein motorunabhängiges Fahrzeugheizgerät

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7278473B2 (en) 2002-06-25 2007-10-09 Behr Gmbh & Co. Exhaust gas heat exchanger and method for the production thereof

Also Published As

Publication number Publication date
SI9600111A (en) 1996-10-31
DE69607229D1 (de) 2000-04-27
HUP9600796A2 (en) 1996-10-28
DE19512438A1 (de) 1996-10-10
HU9600796D0 (en) 1996-05-28
DE69607229T2 (de) 2000-09-07
PL313581A1 (en) 1996-10-14
HUP9600796A3 (en) 2000-02-28
ATE191059T1 (de) 2000-04-15
CZ90796A3 (en) 1996-10-16
EP0736674A1 (fr) 1996-10-09

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