DE2727967A1 - Monolithic metal catalyst for exhaust gas detoxification - with metal foils joined by laser beam welding (SW 4.12.78) - Google Patents

Monolithic metal catalyst for exhaust gas detoxification - with metal foils joined by laser beam welding (SW 4.12.78)

Info

Publication number
DE2727967A1
DE2727967A1 DE19772727967 DE2727967A DE2727967A1 DE 2727967 A1 DE2727967 A1 DE 2727967A1 DE 19772727967 DE19772727967 DE 19772727967 DE 2727967 A DE2727967 A DE 2727967A DE 2727967 A1 DE2727967 A1 DE 2727967A1
Authority
DE
Germany
Prior art keywords
monolithic
insert
metal foils
metal catalyst
laser beam
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
DE19772727967
Other languages
German (de)
Other versions
DE2727967C2 (en
Inventor
Rainer Dipl Ing Scholz
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.)
Audi AG
Original Assignee
Audi NSU Auto Union AG
Audi 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 Audi NSU Auto Union AG, Audi AG filed Critical Audi NSU Auto Union AG
Priority to DE2727967A priority Critical patent/DE2727967C2/en
Priority to CA301,973A priority patent/CA1102706A/en
Priority to CH478378A priority patent/CH636408A5/en
Priority to JP5321978A priority patent/JPS5413462A/en
Priority to SE7805125A priority patent/SE439660B/en
Priority to US05/903,059 priority patent/US4186172A/en
Publication of DE2727967A1 publication Critical patent/DE2727967A1/en
Application granted granted Critical
Publication of DE2727967C2 publication Critical patent/DE2727967C2/en
Expired legal-status Critical Current

Links

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
    • 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
    • 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
    • F01N3/2842—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration specially adapted for monolithic supports, e.g. of honeycomb type
    • 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
    • F01N2330/04—Methods of manufacturing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Laser Beam Processing (AREA)

Abstract

Parent patent described a monolithic metal catalyst for the detoxification of the exhaust gases of i.c. engines e.g. of motor cars, in which corrugated metal foils are joined up to form a solid element. In this addn. this operation is effected by laser beam welding. Process facilitates the joining of the corrugated metal foils by a seam or spot weld, and also the fixture of the insert to the casing by a fillet weld at the open end.

Description

Im Hauptpatent wird eine resonanzfreie Ausbildung und eine sichere Befestigung des aus Metallfolien gebildeten monolithischen Einsatzes im Katalysatorgehäuse durch Anwendung des an sich bekannten Elektronenstrahlschweißens erzielt.The main patent is a resonance-free training and a safe Fastening of the monolithic insert made of metal foils in the catalytic converter housing achieved by using electron beam welding, which is known per se.

Aufgabe der Zusatzerfindung ist es, eine weitere, vor-The task of the additional invention is to

teilhafte Ausbildung des Metallkatalysators sowie ein Verfahren zu dessen wirtschaftlicher Herstellung aufzuzeigen.partial formation of the metal catalyst and a method too to show its economical production.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Metallfolien laserstrahlgeschweißt sind. Ein wirtschaftliches Verfahren zum Herstellen des monolithischen Einsatzes wirt erfindungsgemäß erzielt, indem die Stirnseiten des monolithischen Einsatzes ggf. sich mehrfach überkreuzend an einer Strahlkanone vorbeigeführt werden, wobei jeweils an den stirnseitigen Berührungsstellen der Metallfolien, vorzugsweise entlang einer durch die Längsmittelachse des monolithischen Einsatzes verlaufenden Linie diese untereinander verschweißt werden.This object is achieved according to the invention in that the metal foils are laser beam welded. An economical method of making the monolithic Use is achieved according to the invention by the end faces of the monolithic If necessary, cross each other several times past a jet cannon, wherein in each case at the end-face contact points of the metal foils, preferably along a through the longitudinal center axis of the monolithic insert Line these are welded together.

In zweckmäßiger Weiterbildung der Erfindung kann die äußere Lage des monolithischen Einsatzes stirnseitig mit dem Gehäuse verschweißt werden, wobei der Schweistrahl von innerhalb der Längsprojektion des monolithischen Einsatzes nach außen gerichtet ist. Die Schweißung kann an der stirnseitigen Kante des monolithischen Einsatzes über dessen gesamten Umfang oder punktförmig erfolgen.In an expedient development of the invention, the outer layer of the The monolithic insert is welded to the front of the housing, with the Welding beam from within the longitudinal projection of the monolithic insert is directed outside. The weld can be done on the front edge of the monolithic Use over its entire circumference or in a punctiform manner.

Die Erfindung ist anhand eines Ausführungsbeispieles näher erläutert. Die Zeichnung zeigt in Fig. 1 einen erfindungsgemäßen Metallkatalysator im Längsschnitt, Fig. 2 den Metallkatalysator in der Ansicht X der Fig. 1.The invention is explained in more detail using an exemplary embodiment. The drawing shows in Fig. 1 a metal catalyst according to the invention in longitudinal section, FIG. 2 shows the metal catalyst in view X of FIG. 1.

Der in lig. 1 dargestellte Metallkatalysator 10 setzt sich aus einem zylindrischen Gehäusemantel 11 und zwei kegeligen Endstücken 12 mit Flanschen 13 zum Anschluß an eine nicht dargestellte Abgasanlage zusammen. In der Fig. 1 ist nur ein Endstück 12 dargestellt, das zweite ist sich spiegelbildlich gleich vorzustellen. Im Gehäusemantel 11 ist ein monolithischerEinsatz 14 (Fig. 2) aus zwei in etwa gleich langen, spiralförmig aufgerollten, katalytisch wirksamen Metallfolien 15 und 16 angeordnet. Dic eine Metallfolie 15 ist sinusförmig ausgebildet (der einfacheren Darstellung wegen ist nur die äußere Windung gezeichnet), sodaß sich zwischen den beiden Metallfolien 15 und 16 eille Vielzahl von Gasdurchlässen bildet. Erfindungsgemäß sind die Metallfolien, deren Metallstärke nur ca. 5 x 10-2 mm beträgt, untereinander durch Anwendung des an sich bekannten Laserstrahl-Schweißverfahrens zu einem in sich festen Einsatz verbunden, so daß Schwingungsresonanzen oder Verlangerungen des Einsatzes 14 im Gehäuse vermieden werden.The in lig. 1 shown metal catalyst 10 is composed of a cylindrical housing jacket 11 and two conical end pieces 12 with flanges 13 for connection to an exhaust system, not shown. In Fig. 1 is only one end piece 12 is shown, the second is to be imagined as a mirror image. In the housing shell 11, a monolithic insert 14 (Fig. 2) of two is approximately the same long, spirally rolled up, catalytically active metal foils 15 and 16 arranged. The metal foil 15 is sinusoidal (the simpler one Because of the illustration, only the outer turn is drawn), so that between the two metal foils 15 and 16 form a plurality of gas passages. According to the invention are the metal foils, the metal thickness of which is only approx. 5 x 10-2 mm, one below the other by applying the known laser beam welding process to an in fixed use connected, so that vibrational resonances or extensions of the insert 14 in the housing can be avoided.

Bei der Herstellung des beschriebenen Metallkatalysators 10 wird der monolithische Einsatz 14 nach dem Aufrollen mit seinen Stirnseiten sich mehrfach überkreuzend (gestrichelte Linien 17 der Fig. 2) an einer Laserstrahlkanone (nicht dargestellte) vorbeigeführt, wobei die hochenergitischen Laserstrahlen die Metallfolien 15 und 16 an ihren stirnseitigen Berührungsstellen verschweißen. Anschließend wird der Einsatz 14 in den Gehäusemantel 11 eingeschoben; ein Laserstrahl 18 wird von innerhalb der Längsprojektion des Einsatzes 14 nach außen auf die äußere Windung des Einsatzes 14 gerichtet und verschweißt diese mittels einer Kehlnaht mit dem Gehäusemantel 11.In the production of the metal catalyst 10 described, the monolithic insert 14 after rolling up with its end faces several times crossing over (dashed lines 17 in FIG. 2) on a laser beam gun (not shown), with the high-energy laser beams touching the metal foils 15 and 16 weld together at their frontal contact points. Then will the insert 14 pushed into the housing jacket 11; a laser beam 18 is from within the longitudinal projection of the insert 14 outwards onto the outer turn of the insert 14 directed and welded them by means of a fillet weld with the Housing jacket 11.

Die Kehlnaht kann über den gesamten Umfang des Einsatzes 14 verlaufen oder mehrmals unterbrochen über dessen Umfang verteilt sein. Bei einer punktförmigen Schweißung der äußeren Wirkung kann dies in einem Arbeitsgang mit dem Verschweißen der Stirnseiten des Einsatzes 14 erfolgen. Nachdem der monolithische Einsatz 14 in sich und mit dem Gehäusemantel 11 verschweißt ist, werden die Endstücke 12 an den Gehäusemantel 11 angeschweißt.The fillet weld can run over the entire circumference of the insert 14 or be distributed several times interrupted over its scope. With a punctiform Welding the external effect can do this in one operation with the welding the end faces of the insert 14 take place. After the monolithic insert 14 is welded into itself and to the housing jacket 11, the end pieces 12 are attached to the housing jacket 11 is welded on.

Claims (3)

Monolithischer Metallkatalysator zum Eingiften der Abgase von Brennkraftmaschinen, insbesondere in Kraftfahrzeugen, sowie Verfahren zum Herstellen desselben. Monolithic metal catalytic converter for poisoning the exhaust gases from internal combustion engines, in particular in motor vehicles, as well as methods for producing the same. Patentansprüche: 1. Monolithischer Metallkatalysator zum Entgiften der Abgase von Brennkraftmaschinen, insbesondere in Kraftfahrzeugen, sowie Verfahren zum Herstellen desselben, wobei in dessen Gehäuse ein Einsatz aus einer oder mehreren zwischen sich Gasdurchlässe bildenden, übereinander geschichtetenMetallfolien eingesetzt ist und nach der DT-Patentanmeldung P 27 20 322.1 die Metallfolien untereinander zu einem in sich festen Einsatz verbunden und im Gehäuse befestigt sind, dadurch gekennzeichnet, daß die Metallfolien (15, 16) laserstrahlgeschweißt sind. Claims: 1. Monolithic metal catalyst for detoxification the exhaust gases from internal combustion engines, especially in motor vehicles, and processes for producing the same, with an insert of one or more in the housing inserted between stacked metal foils that form gas passages is and according to the DT patent application P 27 20 322.1 the metal foils with each other are connected to a fixed insert and fixed in the housing, thereby characterized in that the metal foils (15, 16) are laser beam welded. 2. Verfahren zum Herstellen des monolithischen Metallkatalysators nach Anspruch 1, dadurch gekennzeichnet, daß der monolithische Einsatz (14) mit seinen Stirnseiten ggf. sich mehrfach überkreuzend an einer Strahlkanone vorbeigeführt und verschweißt wird.2. Method of manufacturing the monolithic metal catalyst according to claim 1, characterized in that the monolithic insert (14) with its end faces possibly crossed several times past a jet cannon and is welded. 3. Verfahren nach den vorhergehenden Ansprüchen, dadurch gekennzeichnet, daß die äußere Lage des monolithischen Einsatzes (14) stirnseitig mit dem Gehäuse (11) verschweißt wird, wobei der Schweißstrahl von innerhalb der Längsprojektion des monolithischen Einsatzes (14) nach außen gerichtet ist.3. The method according to the preceding claims, characterized in, that the outer layer of the monolithic insert (14) at the end with the housing (11) is welded, the welding beam from within the longitudinal projection of the monolithic insert (14) is directed outwards. Die Erfindung bezieht sich auf einen monolithischen Metallkatalysator gemäß dem Oberbegriff des Hauptanspruches.The invention relates to a monolithic metal catalyst according to the preamble of the main claim.
DE2727967A 1977-05-06 1977-06-22 Method of making a catalyst device Expired DE2727967C2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE2727967A DE2727967C2 (en) 1977-06-22 1977-06-22 Method of making a catalyst device
CA301,973A CA1102706A (en) 1977-05-06 1978-04-25 Monolithic metal catalyst for the detoxication of the exhaust gases of internal combustion engines
CH478378A CH636408A5 (en) 1977-05-06 1978-05-02 MONOLITHIC METAL CATALYST FOR DETOXIFYING EXHAUST GAS FROM ENGINE AND MANUFACTURING.
JP5321978A JPS5413462A (en) 1977-05-06 1978-05-02 Metal catalyst case of unit structure for removing poison from exhaust gas of internal combustion engine and method of making said metal catalyst case
SE7805125A SE439660B (en) 1977-05-06 1978-05-03 PROCEDURE FOR PREPARING A CATALYST BODY INTENDED FOR COMBUSTION ENGINE
US05/903,059 US4186172A (en) 1977-05-06 1978-05-05 Monolithic catalytic muffler having nondeposit welds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2727967A DE2727967C2 (en) 1977-06-22 1977-06-22 Method of making a catalyst device

Publications (2)

Publication Number Publication Date
DE2727967A1 true DE2727967A1 (en) 1979-01-18
DE2727967C2 DE2727967C2 (en) 1983-10-13

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DE2727967A Expired DE2727967C2 (en) 1977-05-06 1977-06-22 Method of making a catalyst device

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459365A1 (en) * 1979-06-19 1981-01-09 Sueddeutsche Kuehler Behr METHOD FOR MANUFACTURING A MATRIX FOR SUPPORTING A CATALYTIC REAGENT FOR THE PURIFICATION OF EXHAUST GASES FROM INTERNAL COMBUSTION ENGINES OF MOTOR VEHICLES
DE2946685A1 (en) * 1979-11-20 1981-05-27 Degussa Ag, 6000 Frankfurt METHOD FOR PRODUCING A MONOLITHIC METAL MATRIX COATED WITH CATALYSIS PROMOTING METAL OXIDE
FR2593553A1 (en) * 1986-01-24 1987-07-31 Daimler Benz Ag Device for purifying exhaust gases of an engine, comprising a catalytic converter with a metal matrix welded into a casing
EP0245737A1 (en) * 1986-05-12 1987-11-19 INTERATOM Gesellschaft mit beschränkter Haftung Honeycomb body, particularly a catalyst carrier, provided with opposedly folded metal sheet layers, and its manufacturing process
EP0245738A1 (en) * 1986-05-12 1987-11-19 INTERATOM Gesellschaft mit beschränkter Haftung Metallic honeycomb body, particularly a catalyst carrier, provided with a supporting wall, and its manufacturing process
US4777158A (en) * 1985-08-19 1988-10-11 Interatom Gmbh Method for the selective brazing of a metallic catalyst carrier body and a correspondingly produced catalyst carrier body
US4824011A (en) * 1985-10-25 1989-04-25 Interatom Gmbh Catalyst carrier body and method and apparatus for brazing the same
US5366700A (en) * 1991-04-16 1994-11-22 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Apparatus for catalytically decontaminating exhaust gases and method for producing the apparatus
US5446006A (en) * 1992-10-05 1995-08-29 Degussa Aktiengesellschaft Monolithic catalyst with a metal carrier
EP0820830A2 (en) * 1993-06-07 1998-01-28 Nippon Yakin Kogyo Co., Ltd. Exhaust gas cleaning metal carrier and method of manufacturing the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629546A (en) * 1969-04-02 1971-12-21 American Can Co Air-cooled laser processing of materials
DE2302746A1 (en) * 1973-01-20 1974-07-25 Sueddeutsche Kuehler Behr CARRIER MATRIX FOR A CATALYTIC REACTOR FOR EXHAUST GAS CLEANING IN COMBUSTION MACHINES, ESPEC. GASOLINE ENGINES OF MOTOR VEHICLES AND A MANUFACTURING PROCESS

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629546A (en) * 1969-04-02 1971-12-21 American Can Co Air-cooled laser processing of materials
DE2302746A1 (en) * 1973-01-20 1974-07-25 Sueddeutsche Kuehler Behr CARRIER MATRIX FOR A CATALYTIC REACTOR FOR EXHAUST GAS CLEANING IN COMBUSTION MACHINES, ESPEC. GASOLINE ENGINES OF MOTOR VEHICLES AND A MANUFACTURING PROCESS

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6344466B2 (en) * 1979-06-19 1988-09-05 Juutodoitsuche Kyuuraafuaburiiku Yuriusu Furau Beeru Gmbh Unto Co Kg
JPS61199574A (en) * 1979-06-19 1986-09-04 臼井国際産業株式会社 Manufacture of carrying matrix for catalyst reactant
FR2459365A1 (en) * 1979-06-19 1981-01-09 Sueddeutsche Kuehler Behr METHOD FOR MANUFACTURING A MATRIX FOR SUPPORTING A CATALYTIC REAGENT FOR THE PURIFICATION OF EXHAUST GASES FROM INTERNAL COMBUSTION ENGINES OF MOTOR VEHICLES
DE2946685A1 (en) * 1979-11-20 1981-05-27 Degussa Ag, 6000 Frankfurt METHOD FOR PRODUCING A MONOLITHIC METAL MATRIX COATED WITH CATALYSIS PROMOTING METAL OXIDE
FR2470245A1 (en) * 1979-11-20 1981-05-29 Degussa PROCESS FOR THE PRODUCTION OF A METALITE METALLIC MATRIX COATED WITH A METAL OXIDE PROVIDING A CATALYSIS
US4777158A (en) * 1985-08-19 1988-10-11 Interatom Gmbh Method for the selective brazing of a metallic catalyst carrier body and a correspondingly produced catalyst carrier body
US4824011A (en) * 1985-10-25 1989-04-25 Interatom Gmbh Catalyst carrier body and method and apparatus for brazing the same
FR2593553A1 (en) * 1986-01-24 1987-07-31 Daimler Benz Ag Device for purifying exhaust gases of an engine, comprising a catalytic converter with a metal matrix welded into a casing
EP0245738A1 (en) * 1986-05-12 1987-11-19 INTERATOM Gesellschaft mit beschränkter Haftung Metallic honeycomb body, particularly a catalyst carrier, provided with a supporting wall, and its manufacturing process
US4803189A (en) * 1986-05-12 1989-02-07 Interatom Gmbh Catalyst carrier of metallic honeycomb having a supporting wall and a method for producing the same
EP0245737A1 (en) * 1986-05-12 1987-11-19 INTERATOM Gesellschaft mit beschränkter Haftung Honeycomb body, particularly a catalyst carrier, provided with opposedly folded metal sheet layers, and its manufacturing process
US4832998A (en) * 1986-05-12 1989-05-23 Interatom Gmbh Honeycomb body, especially a catalyst carrier body having sheet metal layers twisted in opposite directions and a method for producing the same
US4923109A (en) * 1986-05-12 1990-05-08 Interatom Gmbh Method for producing a honeycomb body, especially a catalyst carrier body having sheet metal layers twisted in opposite directions
US4946822A (en) * 1986-05-12 1990-08-07 Interatom Gmbh Catalyst carrier body having a supporting wall and a method for producing the same
US5366700A (en) * 1991-04-16 1994-11-22 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Apparatus for catalytically decontaminating exhaust gases and method for producing the apparatus
US5797183A (en) * 1991-04-16 1998-08-25 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Method for producing an apparatus for catalytically decontaminating exhaust gases
US5446006A (en) * 1992-10-05 1995-08-29 Degussa Aktiengesellschaft Monolithic catalyst with a metal carrier
EP0820830A2 (en) * 1993-06-07 1998-01-28 Nippon Yakin Kogyo Co., Ltd. Exhaust gas cleaning metal carrier and method of manufacturing the same
EP0820830A3 (en) * 1993-06-07 1998-04-29 Nippon Yakin Kogyo Co., Ltd. Exhaust gas cleaning metal carrier and method of manufacturing the same

Also Published As

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Owner name: AUDI AG, 8070 INGOLSTADT, DE

8365 Fully valid after opposition proceedings
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