EP1088588A2 - Corps catalytique avec des couches de tôles empilées et/ou enroulées - Google Patents

Corps catalytique avec des couches de tôles empilées et/ou enroulées Download PDF

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Publication number
EP1088588A2
EP1088588A2 EP00115811A EP00115811A EP1088588A2 EP 1088588 A2 EP1088588 A2 EP 1088588A2 EP 00115811 A EP00115811 A EP 00115811A EP 00115811 A EP00115811 A EP 00115811A EP 1088588 A2 EP1088588 A2 EP 1088588A2
Authority
EP
European Patent Office
Prior art keywords
sheet metal
carrier body
metal layers
outer jacket
stacked
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.)
Withdrawn
Application number
EP00115811A
Other languages
German (de)
English (en)
Other versions
EP1088588A3 (fr
Inventor
Marko Kovacic
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1088588A2 publication Critical patent/EP1088588A2/fr
Publication of EP1088588A3 publication Critical patent/EP1088588A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • 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
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • 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

Definitions

  • the invention relates to a catalyst carrier body with stacked and / or wound sheet metal layers, with their edge sections with a enveloping outer jacket are integrally connected.
  • the environment is referred to DE 197 04 129 A1.
  • Metallic support bodies for catalysts especially for exhaust gas purification on motor vehicle internal combustion engines, usually consist of Sheet metal strips or so-called sheet metal layers, which are preferably cylindrical packages be wrapped.
  • a package provides the carrier matrix for the catalyst material and is inserted into a metal can or the like forms the so-called outer jacket of the exhaust gas catalytic converter.
  • the sheet layers which in turn, can be particularly structured to deal with neighboring ones Sheet metal layers in the assembled state individual gas channels to form for the gas or exhaust gas to be cleaned in the catalytic converter are usually fixed to the outer jacket, and with it on the inside this is preferably soldered, generally integrally connected.
  • a catalyst carrier body should have a good cold start behavior of the catalyst have the lowest possible heat capacity; further is the lowest possible flow resistance with respect to the carrier body flowing gases desired.
  • the solution to this problem is characterized in that the sheet metal layers in its central area, which is spaced from the outer jacket, a smaller one Have wall thickness or thickness than in its outer area, the most or is close to the outer jacket.
  • a particularly advantageous training describes claim 2, while in claim 3 an advantageous manufacturing method for such sheet metal layers of a catalyst carrier body according to the invention is specified.
  • the individual ones forming the carrier body Sheet layers above their surface have a different thickness or thickness, i.e. Wall thickness.
  • a different thickness or thickness i.e. Wall thickness.
  • cohesively or the sheet layers are thicker than in their surface center areas.
  • the individual sheet layers come with these central areas now in the central area of the catalytic converter housing, i.e. spaced from the outer jacket. In these central areas are the mechanical strength requirements less than in the outside areas, because in the middle areas there is no integral connection since the sheet metal layers there not soldered, but only slightly movably suspended on the outside are. This can make the surface center areas of the sheet layers weaker, i.e. be formed thinner than their edge areas.
  • the sheet metal layers can different within the outer casing forming the catalyst housing arranged, for example stacked and / or wound.
  • a common one Construction in which the present invention can be implemented particularly inexpensively is that the sheet metal layers are essentially superimposed Are wound in an S-shape and thereby a carrier body with in form an essentially circular cross section. Then preferably thicker edge areas of the individual sheet layers based on their surface be designed so wide that these edge areas with respect to the wound carrier body lie in a ring area, which is directly attached connects the outer jacket forming the catalyst housing and the in Radial direction measured up to 0.1 times the diameter of the carrier body is wide. Coming concentrically within this ring area then the sheet layers with their thinner central areas to lie on.
  • Sheet metal layers designed according to the invention are particularly simple for one catalyst carrier body according to the invention by different strength Rollers can be produced.
  • the sheet metal layers of a metallic catalyst carrier body are generally by rolling or generally by mechanical Forming, manufactured. Now only the so-called middle areas of the sheet layers are rolled thinner than their so-called edge areas around which to obtain sheet metal layers required for a carrier body according to the invention.
  • FIG. 1 showing the cross section of a catalyst carrier body according to the invention, of which in FIG. 2 the section X from FIG. 1 and in FIG. 3 a single sheet metal layer not yet wound to the carrier body is.
  • Reference number 1 denotes the metallic carrier body of an exhaust gas catalytic converter of a motor vehicle internal combustion engine, which is arranged within a sleeve-shaped outer casing 2.
  • the internal combustion engine exhaust gas to be cleaned in the catalytic converter flows perpendicularly to the plane of the drawing through the carrier body 1, which consists of a plurality of sheet-metal layers 3 which are stacked on top of one another and between which channels for the gas flowing through are formed.
  • the surfaces of the sheet metal layers 3 forming the channel walls are coated with the catalyst material, ie with the catalytically active material.
  • the sheet-metal layers 3 stacked on top of one another are wound essentially in an S-shape in order to form the carrier body 1 which is circular in cross section.
  • the carrier body 1 is pushed into the sleeve-shaped outer jacket 2 and fixed to it by soldering, generally by means of a material connection.
  • soldering generally by means of a material connection.
  • the edge sections of the individual sheet metal layers 3 are connected to the outer jacket 2 via solder joints 4.
  • FIG. 3 shows a single sheet-metal layer 3 in the flat state, ie before it is wound together with further sheet-metal layers 3 to form the carrier body 1, in a sectional plane which corresponds to that of FIGS. 1, 2.
  • the sheet metal layers 3 have a greater thickness or wall thickness in their two so-called edge regions 5a than in their central region (s) 5b. (In the illustration according to FIG. 3, this thickness is measured in the vertical direction).
  • each sheet metal layer 3 comes to lie with its edge regions 5a near the outer jacket 2, or the edge sections of the sheet metal layers 3, which are part of the edge areas 5a, lie directly on the inside of the outer jacket 2 on.
  • the edge regions 5a lie in a so-called ring region 6 of the carrier body 1, which adjoins the outer jacket 2 towards the inside and whose width, measured in the radial direction, corresponds approximately to 0.1 times the total carrier body diameter .
  • the central regions 5b of the individual sheet metal layers 3 thus come to lie concentrically within this ring region 6.
  • a forming tool is schematically shown in FIG. 3 under reference number 8, with the aid of which the so-called central region 5b of each sheet metal layer 3 can be made thinner than the edge regions 5a thereof.
  • this forming tool 8 can be a rolling tool.
  • the wall thicknesses or thickness dimensions of the individual sheet metal layers 3 can be in the order of 60 ⁇ m to 100 ⁇ m in their edge areas 5a and in the order of 20 ⁇ m to 50 ⁇ m in the central areas, but this and a large number of further details, in particular of a constructive type, can be quite different be designed from the embodiment shown, without leaving the content of the claims.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Catalysts (AREA)
  • Exhaust Gas After Treatment (AREA)
EP00115811A 1999-09-28 2000-07-22 Corps catalytique avec des couches de tôles empilées et/ou enroulées Withdrawn EP1088588A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19946462 1999-09-28
DE19946462A DE19946462A1 (de) 1999-09-28 1999-09-28 Katalysator-Trägerkörper mit gestapelten und/oder gewickelten Blechlagen

Publications (2)

Publication Number Publication Date
EP1088588A2 true EP1088588A2 (fr) 2001-04-04
EP1088588A3 EP1088588A3 (fr) 2001-06-27

Family

ID=7923581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00115811A Withdrawn EP1088588A3 (fr) 1999-09-28 2000-07-22 Corps catalytique avec des couches de tôles empilées et/ou enroulées

Country Status (2)

Country Link
EP (1) EP1088588A3 (fr)
DE (1) DE19946462A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5102743A (en) * 1988-02-11 1992-04-07 Emitec Gesellschaft Fur Emissionstechnologie Mbh Honeycomb body, in particular with S-shaped, partially reinforced layers of sheet metal
DE4418630A1 (de) * 1994-05-27 1995-11-30 Emitec Emissionstechnologie Wabenkörper auf Blechlagen unterschiedlicher Vormaterialien

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4112354A1 (de) * 1991-04-16 1992-10-22 Behr Gmbh & Co Vorrichtung zum katalytischen entgiften von abgasen
DE4219673A1 (de) * 1992-06-16 1993-12-23 Emitec Emissionstechnologie Metallträger aus Streckmetallband
DE4409026A1 (de) * 1994-03-16 1995-11-09 Bayerische Motoren Werke Ag Abgaskatalysator, insbesondere für Brennkraftmaschinen
DE19704129A1 (de) * 1997-02-04 1998-08-06 Emitec Emissionstechnologie Wabenkörper, insbesondere Katalysator-Trägerkörper,mit verstärkter Wandstruktur

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5102743A (en) * 1988-02-11 1992-04-07 Emitec Gesellschaft Fur Emissionstechnologie Mbh Honeycomb body, in particular with S-shaped, partially reinforced layers of sheet metal
DE4418630A1 (de) * 1994-05-27 1995-11-30 Emitec Emissionstechnologie Wabenkörper auf Blechlagen unterschiedlicher Vormaterialien

Also Published As

Publication number Publication date
EP1088588A3 (fr) 2001-06-27
DE19946462A1 (de) 2001-03-29

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