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EP0306705B1 - Support pour la fabrication d'un réacteur catalytique pour la purification de gaz d'échappement - Google Patents

Support pour la fabrication d'un réacteur catalytique pour la purification de gaz d'échappement Download PDF

Info

Publication number
EP0306705B1
EP0306705B1 EP88112685A EP88112685A EP0306705B1 EP 0306705 B1 EP0306705 B1 EP 0306705B1 EP 88112685 A EP88112685 A EP 88112685A EP 88112685 A EP88112685 A EP 88112685A EP 0306705 B1 EP0306705 B1 EP 0306705B1
Authority
EP
European Patent Office
Prior art keywords
support body
matrix
body according
casing assembly
solder material
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
EP88112685A
Other languages
German (de)
English (en)
Other versions
EP0306705A3 (en
EP0306705A2 (fr
Inventor
Reinhold Dipl.-Ing. Kuchelmeister (Fh)
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.)
Vitesco Technologies Lohmar Verwaltungs GmbH
Original Assignee
Emitec Gesellschaft fuer Emissionstechnologie mbH
Behr GmbH and Co KG
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 Emitec Gesellschaft fuer Emissionstechnologie mbH, Behr GmbH and Co KG filed Critical Emitec Gesellschaft fuer Emissionstechnologie mbH
Publication of EP0306705A2 publication Critical patent/EP0306705A2/fr
Publication of EP0306705A3 publication Critical patent/EP0306705A3/de
Application granted granted Critical
Publication of EP0306705B1 publication Critical patent/EP0306705B1/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
    • 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
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • 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
    • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/20—Methods or apparatus for fitting, inserting or repairing different elements by mechanical joints, e.g. 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/24—Methods or apparatus for fitting, inserting or repairing different elements by bolts, screws, rivets or the like

Definitions

  • the innovation relates to a support body for the production of a catalytic reactor for exhaust gas purification according to the preamble of claim 1.
  • a support body for the production of a catalytic reactor for exhaust gas purification according to the preamble of claim 1.
  • the problem arises because of the manufacturing tolerances which are difficult to maintain the wound or folded matrix is not sufficiently firmly soldered to the inner wall of the housing shell. This either leads to damage at the fastening points during manufacture or, due to thermal expansion, also to damage the catalyst during operation.
  • the invention is therefore based on the object of designing a carrier body of the type mentioned at the outset in such a way that an intimate connection can be produced during the soldering process between the housing shell and the matrix.
  • the characterizing features of the claim are in a carrier body of the type mentioned 1 provided.
  • the arrangement of a wire mesh which has a certain elastic flexibility, allows the matrix to be closely fitted into the housing jacket at all points with the aid of the wire mesh. If this wire mesh is provided with solder material, for example soaked or coated or plated with solder material, then there is also the guarantee that sufficient solder material is available in the fastening area between the housing jacket and the matrix, so that during the soldering process, which is usually carried out in a soldering furnace the desired intimate and permanent connection between the casing and the matrix is achieved.
  • the arrangement of the wire mesh in the outer area of the metallic matrix body can also be used to create a certain heat insulation layer between the housing jacket and the matrix body if care is taken to ensure that the wire mesh, which is tight against the housing jacket, is separated from the inner matrix body by a heat insulation layer .
  • This can be done in a simple manner in that the wire mesh is arranged between end rings which close at least the outermost layer of the metallic matrix body and thus the outermost flow channels in this matrix. This creates a closed air gap in the outer area of the metallic matrix body, which is used for thermal insulation.
  • the opportunity is created to keep the wire mesh mechanically on the metallic matrix body, so that assembly is easier when installed in the housing jacket.
  • the housing jacket from two shells which are placed from the outside onto the metallic matrix body with the wire mesh and by means of flanges or the like. with a certain squeeze of the outer edge of the metallic matrix body are firmly connected to one another.
  • the end rings themselves can be held together by spoke-like tie rods which are passed through the outer air gap ring of the matrix body which is closed off by the end rings. It is also possible to fill this air gap ring with heat-insulating material, for example with ceramic material.
  • the innovation therefore enables not only an intimate and permanent connection of the matrix body to the housing jacket, but also heat insulation to the outside, which does not allow the housing jacket of the catalyst to become too hot during operation.
  • FIG. 1 and 2 show a housing jacket (6) consisting of two shells (6b, 6c) constructed symmetrically to the center plane (11) and which can be installed in an exhaust pipe of a motor vehicle engine.
  • This housing jacket (6) can be provided on the outside with a dashed insulation shell (12) for thermal insulation.
  • a wound matrix body (2) is inserted which, after winding, is pressed into an oval shape from the cylindrical shape (13) indicated by dash-dotted lines in FIG. 2 before it is enclosed between the two shells (6b, 6c).
  • the matrix body (2) is wound in a manner known per se from a corrugated strip and a smooth strip to form a cylinder, which are each wound adjacent to one another.
  • the wound corrugated strip lies between a wound smooth strip.
  • flow channels (5) run in the direction of the axis of the cylinder, through which the exhaust gas flows. The chemical reaction with the later applied catalytic material takes place in these flow channels.
  • a wire mesh (7) for example in the form of a thin wire mesh mat, is wrapped around the matrix body (2) pressed into an oval shape.
  • This wire mesh (7) can be impregnated with solder material or coated or plated with solder material before winding.
  • the wire mesh (7) is subjected to a certain elastic deformation, which leads to the metallic matrix body (2) with its outermost layer (3a) being close to and over the wire mesh (7) bears on the inner wall of the housing shell (6).
  • the two half-shells are placed one on top of the other with the aid of their flanges (14) and either flanged on these flanges with a solder insert in the form of wire foil or powder or also dotted or stapled in a known manner.
  • Known pressure joining processes can also be used.
  • the carrier body prepared in this way then passes into a vacuum furnace, where the solder material in the wire mesh melts and ensures an intimate connection between the housing jacket (6) and the metallic matrix body (2).
  • the matrix body (2) is also provided with solder material on its end faces before soldering, which can be done, for example, by immersing the matrix body in liquid solder material.
  • FIGS. 3 to 7 show an embodiment in which the matrix body (2), which can otherwise be produced in the same way as in the embodiment of FIGS. 1 and 2, has two end rings (9 ) is edged, which has an angular cross section (see FIG. 5) and therefore frame both part of the end face of the matrix body (2) and part of the outer circumference of the matrix body (2).
  • the wire mesh (7) is arranged between these end rings so that their position on the matrix body (2) can also be secured thereby.
  • the housing jacket (6) has circumferential shoulders (16) in the area of the end rings, which create space for receiving the end rings and for axially securing the end rings (9) and thus the matrix body (9) held between the end rings (9). 2) worry.
  • the end rings (9), as is clear from FIGS. 4 and 5, are held together by spoke-like tie rods (10) and pressed against the end face of the matrix body (2), which are passed through flow channels of the matrix body (2) in the outer region.
  • the end rings (9) close at least the outermost layer (3a), but advantageously, as indicated with reference to FIG. 7, at least two layers of the wound matrix body (2) on the end face, so that the flow channels located there form a closed air gap ring which can be used for thermal insulation to the housing jacket (6).
  • the attachment by soldering within the housing shell (6) takes place in the same way as in the embodiment of FIGS. 1 and 2.
  • an opening (8) is provided to the outside in the area of the outer wall (6a) of the housing shell (6) , through which the developing vapors of a solvent for the solder material or excess solder liquid can flow out during the soldering process, which is pressed out of the half-shells by squeezing the wire mesh when the wire mesh is placed on it.
  • the arrangement is therefore expediently always made such that the opening (8) points downward when the matrix body (2) is assembled with the two housing shells (6b, 6c).
  • the annular space closed off by the end rings (9) can also, as indicated schematically in FIGS. 3 and 7, be filled with a heat insulating material, for example with ceramic material.
  • a heat insulating material for example with ceramic material.
  • an additional annular space can therefore be used for heat insulation of the metallic matrix body (2) with respect to the housing jacket (6). Temperatures occurring in the catalytic converter during operation can thus be kept away from the outer jacket of the catalytic converter in a simple manner, without complicated and costly thermal insulation being possible. With the innovation, the thermal insulation is achieved simultaneously with the manufacture of the carrier body.
  • Fig. 6 shows a variant of a face ring (9 '), which is otherwise similar to the face rings (9) of FIG. 5 is constructed.
  • heads (17) of the tie rod (10 ') or for corresponding screw heads similar to the arrangement of bicycle spokes recesses (18) in the end ring (9') are provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Catalysts (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Claims (7)

  1. Support pour la fabrication d'un réacteur catalytique pour la purification de gaz d'échappement, notamment pour des moteurs de véhicules automobiles, constitué d'une matrice d'une ou plusieurs bandes métalliques, qui sont repliées ou enroulées en plusieurs couches disposées les unes contre les autres, peuvent être enduites du matériau catalytique, forment entre elles des canaux d'écoulement (5) pour les gaz d'échappement et sont incorporées dans une enveloppe de boîtier (6) en forme de manchon, du matériau de brasage étant prévu au moins dans la région de la couche la plus extérieure (3e) et de l'enveloppe de boîtier (6) pour l'assemblage par brasage, caractérisé en ce qu'un treillis métallique (7) est incorporé entre la couche la plus extérieure (3a) et l'enveloppe de boîtier (6) afin de recevoir le matériau de brasage et d'obtenir une liaison intime entre l'enveloppe de boîtier et la matrice.
  2. Support selon la revendication 1, caractérisé en ce que le treillis métallique est réalisé sous la forme d'une natte pouvant être imprégnée de matériau de brasage.
  3. Support selon la revendication 1, caractérisé en ce que le treillis métallique (7) est enduit ou plaqué de matériau de brasage au moins dans sa région tournée vers l'extérieur.
  4. Support selon la revendication 1 et l'une des autres revendications, caractérisé en ce que l'enveloppe de boîtier (6) est munie d'au moins une ouverture (8), prévue sur la paroi extérieure (6a).
  5. Support selon l'une des revendications 1 à 4, caractérisé en ce que le treillis métallique (7) est disposé entre des bagues frontales (9), qui ferment sur les côtés frontaux au moins une couche de la matrice (2).
  6. Support selon la revendication 5, caractérisé en ce que les bagues frontales (9) sont tirées, l'une vers l'autre et contre les côtés frontaux de la matrice (2), par des tirants (10) du genre rayons de bicyclette.
  7. Support selon l'une des revendications 1 à 6, caractérisé en ce que l'enveloppe de boîtier (6) est constituée de deux coques (6b, 6c).
EP88112685A 1987-09-10 1988-08-04 Support pour la fabrication d'un réacteur catalytique pour la purification de gaz d'échappement Expired - Lifetime EP0306705B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8712267U 1987-09-10
DE8712267U DE8712267U1 (de) 1987-09-10 1987-09-10 Trägerkörper für die Herstellung eines katalytischen Reaktors zur Abgasreinigung

Publications (3)

Publication Number Publication Date
EP0306705A2 EP0306705A2 (fr) 1989-03-15
EP0306705A3 EP0306705A3 (en) 1989-07-12
EP0306705B1 true EP0306705B1 (fr) 1992-06-17

Family

ID=6811954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88112685A Expired - Lifetime EP0306705B1 (fr) 1987-09-10 1988-08-04 Support pour la fabrication d'un réacteur catalytique pour la purification de gaz d'échappement

Country Status (3)

Country Link
EP (1) EP0306705B1 (fr)
DE (2) DE8712267U1 (fr)
ES (1) ES2031966T3 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8715289U1 (de) * 1987-11-18 1988-01-14 Emitec Gesellschaft für Emissionstechnologie mbH, 53797 Lohmar Trägerkörper für einen katalytischen Reaktor zur Abgasreinigung
JP2545564B2 (ja) * 1987-12-28 1996-10-23 臼井国際産業株式会社 排気ガス浄化用触媒を担持するための金属製担持母体の製造方法
DE3817490C2 (de) * 1988-05-21 1996-07-04 Emitec Emissionstechnologie Trägerkörper für einen katalytischen Reaktor zur Abgasreinigung
DE8811086U1 (de) * 1988-09-01 1988-10-20 Emitec Gesellschaft für Emissionstechnologie mbH, 53797 Lohmar Trägerkörper für einen katalytischen Reaktor zur Abgasreinigung
DE3833675A1 (de) * 1988-10-04 1990-04-05 Sueddeutsche Kuehler Behr Traegerkoerper fuer einen katalytischen reaktor zur abgasreinigung
FR2656376B1 (fr) * 1989-12-22 1994-04-29 Rosi Ets Pot d'echappement, notamment catalytique, pour les gaz brules de moteurs a combustion interne.
DE4041856A1 (de) * 1990-12-24 1992-06-25 Behr Gmbh & Co Vorrichtung zur katalytischen entgiftung von abgasen, vorzugsweise von verbrennungskraftmaschinen
JP3222542B2 (ja) * 1992-04-24 2001-10-29 株式会社デンソー 金属製触媒担体
JP3216545B2 (ja) * 1996-01-26 2001-10-09 トヨタ自動車株式会社 内燃機関の排気浄化用触媒装置

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2182614B1 (fr) * 1972-03-17 1978-05-05 Louyot Comptoir Lyon Alemand
DE2218673A1 (de) * 1972-04-18 1973-10-25 Volkswagenwerk Ag Anordnung zur abgasentgiftung mit einem katalysatoreinsatz
DE2243251B2 (de) * 1972-09-02 1976-01-02 Paul Gillet Gmbh, 6732 Edenkoben Vorrichtung zur Reinigung der Abgase von Brennkraftmaschinen
FR2215091A5 (fr) * 1973-01-24 1974-08-19 Peugeot & Renault
JPS5030115U (fr) * 1973-07-11 1975-04-04
US4335078A (en) * 1977-09-13 1982-06-15 Nissan Motor Company, Limited Catalytic reactor for automotive exhaust line
DE2856030C2 (de) * 1978-12-23 1987-02-12 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Verfahren zum Herstellen einer aus Metallfolien gewickelten Trägermatrix für eine Abgaspatrone
GB2047557A (en) * 1979-03-29 1980-12-03 Ti Cheswick Silencers Ltd Catalyst assembly for exhaust systems
DE2924592C2 (de) * 1979-06-19 1983-05-26 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Verfahren zum Herstellen einer Trägermatrix für einen katalytischen Reaktor zur Abgasreinigung bei Brennkraftmaschinen von Kraftfahrzeugen
US4250146A (en) * 1979-10-05 1981-02-10 Uop Inc. Caseless monolithic catalytic converter
DE3406721A1 (de) * 1984-02-24 1985-09-12 LEISTRITZ Maschinenfabrik GmbH, 8500 Nürnberg Katalytische abgasentgiftungseinrichtung
DE3432283A1 (de) * 1984-09-01 1986-03-13 LEISTRITZ Maschinenfabrik GmbH, 8500 Nürnberg Katalytische abgasentgiftungseinrichtung
IT1188371B (it) * 1985-02-14 1988-01-07 Volkswagen Ag Procedimento per fabbricare un corpo portatore in metallo er un convertitore per depurare i gas di scarico e corpo portatore in metallo prodotto secondo questo procedimento
DE3603882A1 (de) * 1985-02-14 1986-08-14 Volkswagen AG, 3180 Wolfsburg Verfahren zur herstellung eines metall-traegerkoerpers fuer einen konverter zur abgasreinigung und nach diesem verfahren hergestellter metall-traegerkoerper
DE3543011A1 (de) * 1985-12-05 1987-06-11 Sueddeutsche Kuehler Behr Matrix fuer einen katalysator

Also Published As

Publication number Publication date
DE3872115D1 (de) 1992-07-23
ES2031966T3 (es) 1993-01-01
EP0306705A3 (en) 1989-07-12
DE8712267U1 (de) 1987-10-22
EP0306705A2 (fr) 1989-03-15

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