EP0277477A1 - Metallic catalyst support having a short tubular casing - Google Patents

Metallic catalyst support having a short tubular casing Download PDF

Info

Publication number
EP0277477A1
EP0277477A1 EP88100077A EP88100077A EP0277477A1 EP 0277477 A1 EP0277477 A1 EP 0277477A1 EP 88100077 A EP88100077 A EP 88100077A EP 88100077 A EP88100077 A EP 88100077A EP 0277477 A1 EP0277477 A1 EP 0277477A1
Authority
EP
European Patent Office
Prior art keywords
catalyst carrier
carrier body
soldered
jacket tube
end faces
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
EP88100077A
Other languages
German (de)
French (fr)
Other versions
EP0277477B1 (en
Inventor
Wolfgang Dipl.-Ing. Maus
Theodor Dipl.-Ing. Cyron
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
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 filed Critical Emitec Gesellschaft fuer Emissionstechnologie mbH
Priority to AT88100077T priority Critical patent/ATE52836T1/en
Publication of EP0277477A1 publication Critical patent/EP0277477A1/en
Application granted granted Critical
Publication of EP0277477B1 publication Critical patent/EP0277477B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/08—Exhaust treating devices having provisions not otherwise provided for for preventing heat loss or temperature drop, using other means than layers of heat-insulating material
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/10—Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49345—Catalytic device making

Definitions

  • the present invention relates to a metallic catalyst carrier body according to the preamble of claim 1.
  • Such catalyst carrier bodies which are preferably used for exhaust gas purification of motor vehicles, are known for example from DE-OS 29 24 592, DE-OS 30 37 796 and DE-OS 35 29 654 known. They are produced, for example, from sheets which are spirally wound, alternately corrugated and smooth or similarly structured sheets and are generally provided with a jacket tube.
  • a catalyst carrier body which has a tubular casing which is shorter on one side than the actual catalyst carrier body.
  • This embodiment is provided in particular as a so-called starting catalytic converter, which is installed close to the engine and is therefore exposed to high thermal loads.
  • the entire length of the jacket tube is soldered to the outermost layer of the catalyst carrier body and completely encloses at least one likewise soldered end face.
  • Such a catalyst carrier body is hampered in its axial and radial expansion or in a so-called growth occurring in these directions by the jacket tube, which can lead to premature destruction.
  • the object of the present invention is therefore, by suitable design and attachment of the casing tube Extend the life of a metallic catalyst carrier body, especially when used as a starting catalyst. A corresponding manufacturing process should also be specified.
  • a shortened jacket tube is to be applied in the case of a catalyst carrier body soldered on the end face at least over part of the end faces such that it ends at a distance in front of the two end faces which is greater than the depth of the there is soldering.
  • This measure enables soldering on the end face, which does not also lead to a connection to the jacket tube in the region of the end faces.
  • the result is that in the case of alternating thermal loads, the soldered end faces are not impeded in their radial and axial expansion by a fixed connection to the jacket tube, so that in particular no tensile loads can occur in this area during cooling.
  • the distance between the casing tube and the end faces should preferably be considerably greater than the depth of the soldering, so that only a slight bending load of the outer layers occurs under alternating thermal loads.
  • the jacket tube is to be soldered to the outermost layer of the catalyst carrier body only in a narrow circumferential zone anyway.
  • this not only leads to a reduction in the thermal alternating loads on the end faces, but also enables the lengthening of the catalyst, which is hardly impeded, or unhindered growth of the catalyst carrier body, which can occur during prolonged operation.
  • soldering can hardly be achieved for manufacturing reasons, since in the case of end-face soldering, solder generally also between the outermost layer of the catalyst carrier body and that Sheath tube arrive and so there will cause unwanted solder connections.
  • the jacket tube has a slightly gaping longitudinal slot, which is preferably bridged by welding only in one area and is thereby fixed.
  • a longitudinally slotted jacket tube enables the production of an exact, precisely defined soldered peripheral zone between the jacket tube and the outermost position of the catalyst carrier body in a particularly simple manner. While according to the prior art, solder was always distributed in an undefined manner when the jacket tube was pushed on, this can be avoided with a slotted jacket tube.
  • the desired peripheral zone to be soldered is solder, e.g. B.
  • this Manufacturing process avoided a crumpling or deforming of the outer layers, which would have a very negative effect particularly in the case of a shortened jacket tube, since the crumpled layers would survive undefined on both sides.
  • the jacket tube can be brought to the desired diameter exactly in a suitable calibration device and fixed, for example, by a welding point. The remaining manufacturing steps are not affected by this measure.
  • the end faces can be soldered before or after these steps.
  • a subsequent complete welding of the longitudinal slot is unnecessary in many cases, since the pipes of the exhaust system can be pushed from both sides over the slotted jacket pipe to the welding point. In such a case, the longitudinal slot even favors the compensation of manufacturing tolerances, since it can be compressed within certain limits.
  • the actual catalyst carrier body 1 consists of alternating layers of spirally wound smooth 2 and corrugated 3 sheets. Metal sheets with a different structure, which form channels which are permeable to gas, are also suitable for the present invention.
  • the catalyst carrier body 1 is soldered on the end face to a depth t 1 or t 2, not necessarily the entire end faces, but possibly only certain areas thereof having to be soldered.
  • the catalyst carrier body 1 is surrounded by a shortened jacket tube 4, which ends on both sides with a distance a1 or a2 in front of the end faces. The two distances a1, a2 need not necessarily be the same size.
  • the casing tube 4 is completely or preferably only soldered to the outermost layer of the catalyst carrier body 1 in a narrow peripheral region 5.
  • the casing tube 4 can have a longitudinal slot 6 (which does not necessarily have to run exactly in the longitudinal direction), which is preferably fixed at one point by a welded connection 7.
  • the design according to the invention does not impede the thermal radial alternating expansion of the soldered end faces, which increases the service life.
  • the slotted jacket tube enables the precise fixing and production of a narrow soldered peripheral area, which means that changes in the length of the catalyst carrier body are not hindered, which also has a favorable effect on the service life.
  • the slotted casing tube prevents the outer layers from being crumpled or shifted when being pushed on, without the need for complex other measures.
  • a catalyst carrier body according to the invention with a shortened jacket tube is particularly suitable for use as a starting catalyst in the area near the engine under high thermal alternating loads.

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)
  • Catalysts (AREA)

Abstract

1. Metal catalyst carrier body (1) with a honey-comb structure formed from textured metal sheets (2, 3) and through which gas can flow, said honey-comb structure being surrounded by a casing tube (4) which is shorter than the catalyst carrier body (1), characterised by the following features : a) the end surfaces of the catalyst carrier body (1) are brazed at least over a portion of said end surfaces as far as a given depth (t1 , t2 ), preferably a few millimeters ; b) the casing tube (4) ends before the two end surfaces at a given distance (a1 , a2 ) away, this being greater than the brazing depth (t1 , t2 ), preferably a distance of 5 to 40 mm ; c) the casing tube (4) is only brazed to the outermost layer of the catalyst carrier body (1) over a narrow circumferential zone (5) and extends annularly over approximately only this circumferential zone (5).

Description

Die vorliegende Erfindung betrifft einen metallischen Katalysator-Trägerkörper gemäß dem Oberbegriff des Anspruchs 1. Solche Katalysator-Trägerkörper, welche vorzugsweise zur Abgasreinigung von Kraftfahrzeugen eingesetzt werden, sind beispielsweise aus der DE-OS 29 24 592, der DE-OS 30 37 796 und der DE-OS 35 29 654 bekannt. Sie werden beispielsweise aus spiralig übereinandergewickelten, abwechselnden gewellten und glatten oder ähnlich strukturierten Blechen hergestellt und im allgemeinen mit einem Mantelrohr versehen.The present invention relates to a metallic catalyst carrier body according to the preamble of claim 1. Such catalyst carrier bodies, which are preferably used for exhaust gas purification of motor vehicles, are known for example from DE-OS 29 24 592, DE-OS 30 37 796 and DE-OS 35 29 654 known. They are produced, for example, from sheets which are spirally wound, alternately corrugated and smooth or similarly structured sheets and are generally provided with a jacket tube.

Aus der DE-OS 36 03 882 ist auch schon ein Katalysator-­Trägerkörper bekannt, welcher ein Mantelrohr aufweist, welches einseitig kürzer als der eigentliche Katalysator-Trägerkörper ist. Diese Ausführungsform ist insbesondere als sogenannter Startkatalysator vorgesehen, welcher motornah eingebaut wird und daher hohen thermischen Belastungen ausgesetzt ist. Nach dem Stand der Technik ist jedoch das Mantelrohr auf seiner gesamten Länge mit der äußersten Lage des Katalysator-Träger­körpers verlötet und umschließt zumindest eine ebenfalls verlötete Stirnseite vollständig. Ein solcher Katalysator-­Trägerkörper ist in seiner axialen und radialen Dehnung bzw. einem in diesen Richtungen auftretenden sogenannten Wachstum durch das Mantelrohr behindert, weshalb es zu vorzeitigen Zerstörungen kommen kann.From DE-OS 36 03 882 a catalyst carrier body is already known, which has a tubular casing which is shorter on one side than the actual catalyst carrier body. This embodiment is provided in particular as a so-called starting catalytic converter, which is installed close to the engine and is therefore exposed to high thermal loads. According to the prior art, however, the entire length of the jacket tube is soldered to the outermost layer of the catalyst carrier body and completely encloses at least one likewise soldered end face. Such a catalyst carrier body is hampered in its axial and radial expansion or in a so-called growth occurring in these directions by the jacket tube, which can lead to premature destruction.

Aufgabe der vorliegenden Erfindung ist es daher, durch geeignete Ausführung und Befestigung des Mantelrohres die Lebensdauer eines metallischen Katalysator-Trägerkörpers zu verlängern, insbesondere beim Einsatz als Startkatalysator. Außerdem soll ein entsprechendes Herstellungsverfahren angegeben werden.The object of the present invention is therefore, by suitable design and attachment of the casing tube Extend the life of a metallic catalyst carrier body, especially when used as a starting catalyst. A corresponding manufacturing process should also be specified.

Zur Lösung dieser Aufgabe wird gemäß dem Anspruch 1 vorgeschlagen, daß bei einem stirnseitig zumindest über einen Teil der Stirnflächen verlöteten Katalysator-Trägerkörper ein verkürztes Mantelrohr so aufgebracht werden soll, daß es mit einem Abstand vor den beiden Stirnseiten endet, welcher größer als die Tiefe der dortigen Lötung ist. Diese Maßnahme ermöglicht zunächst einmal eine stirnseitige Verlötung, welche nicht gleichzeitig auch zu einer Verbindung mit dem Mantelrohr im Bereich der Stirnseiten führt. Das Ergebnis ist, daß bei thermischen Wechselbelastungen die verlöteten Stirnseiten nicht durch eine feste Verbindung zum Mantelrohr in ihrer radialen und axialen Dehnung behindert werden, so daß insbesondere keine Zugbelastungen in diesem Bereich beim Abkühlen auftreten können. Dabei sollte der Abstand des Mantelrohres von den Stirnseiten vorzugsweise erheblich größer als die Tiefe der Lötung sein, damit bei thermischen Wechselbelastungen nur eine schwache Biegebelastung der äußeren Lagen auftritt.To achieve this object, it is proposed according to claim 1 that a shortened jacket tube is to be applied in the case of a catalyst carrier body soldered on the end face at least over part of the end faces such that it ends at a distance in front of the two end faces which is greater than the depth of the there is soldering. This measure enables soldering on the end face, which does not also lead to a connection to the jacket tube in the region of the end faces. The result is that in the case of alternating thermal loads, the soldered end faces are not impeded in their radial and axial expansion by a fixed connection to the jacket tube, so that in particular no tensile loads can occur in this area during cooling. The distance between the casing tube and the end faces should preferably be considerably greater than the depth of the soldering, so that only a slight bending load of the outer layers occurs under alternating thermal loads.

Gemäß Anspruch 2 wird zusätzlich vorgeschlagen, daß das Mantelrohr ohnehin nur auf einer schmalen Umfangszone mit der äußersten Lage des Katalysator-Trägerkörpers verlötet sein soll. Dies führt in Verbindung mit dem Anspruch 1 nicht nur zu einer Verringerung der thermischen Wechselbelastungen der Stirnseiten, sondern ermöglicht auch eine kaum behinderte Längendehnung bzw. ein ungehindertes Wachstum des Katalysator-­Trägerkörpers, welches sich bei längerem Betrieb einstellen kann. Bei einem nicht verkürzten Mantelrohr ist eine solche Lötung aus fertigungstechnischen Gründen kaum zu erreichen, da bei stirnseitigen Verlötungen im allgemeinen auch Lot zwischen die äußerste Lage des Katalysator-Trägerkörpers und das Mantelrohr gelangen und so dort unerwünschte Lötverbindungen bewirken wird.According to claim 2 it is additionally proposed that the jacket tube is to be soldered to the outermost layer of the catalyst carrier body only in a narrow circumferential zone anyway. In conjunction with claim 1, this not only leads to a reduction in the thermal alternating loads on the end faces, but also enables the lengthening of the catalyst, which is hardly impeded, or unhindered growth of the catalyst carrier body, which can occur during prolonged operation. In the case of a non-shortened jacket tube, such soldering can hardly be achieved for manufacturing reasons, since in the case of end-face soldering, solder generally also between the outermost layer of the catalyst carrier body and that Sheath tube arrive and so there will cause unwanted solder connections.

Gemäß Anspruch 3 ist es außerdem möglich, das Mantelrohr praktisch nur auf den Bereich der verlöteten Umfangszone zu beschränken. Es umschließt dann den sehr viel längeren Katalysator-Trägerkörper etwa ringförmig. Diese Ausführung eignet sich natürlich nur für spätere Einbauverhältnisse, bei denen ohnehin noch ein schützendes Hüllrohr angebracht wird, was z. B. bei Startkatalysatoren allgemein der Fall ist. An ein bis zu einem schmalen Ring verkürztes Mantelrohr können die üblichen Rohre des Auslaßsystems eines Verbrennungsmotores problemlos angeschweißt werden, so daß insgesamt ein geschlossenes System entsteht. Die verlöteten Stirnseiten des Katalysator-Trägerkörpers ragen bei fertiggestelltem Abgassystem dann freitragend in die anschließenden Rohrleitungen oder werden durch diese mit gestützt.According to claim 3, it is also possible to restrict the jacket tube practically only to the area of the soldered peripheral zone. It then encloses the much longer catalyst carrier body in a ring shape. This version is of course only suitable for later installation conditions, where a protective cladding tube is attached anyway, which, for. B. is generally the case with starting catalysts. The usual pipes of the exhaust system of an internal combustion engine can be easily welded onto a jacket pipe shortened to a narrow ring, so that a closed system is created overall. When the exhaust system is finished, the soldered end faces of the catalyst carrier body then project freely into the subsequent pipelines or are supported by them.

Ein weiteres besonders wichtiges Merkmal, welches sich prinzipiell auch ohne die Merkmale der vorhergehenden Ansprüche verwirklichen läßt, ist im Anspruch 4 angegeben. Danach weist das Mantelrohr einen geringfügig klaffenden Längsschlitz auf, der vorzugsweise nur in einem Bereich durch eine Schweißung überbrückt und dadurch fixiert ist. Wie im Anspruch 5 angegeben, ermöglicht ein solches längsgeschlitztes Mantelrohr auf besonders einfache Weise die Herstellung einer exakten, genau definierten verlöteten Umfangszone zwischen Mantelrohr und äußerster Lage des Katalysator-Trägerkörpers. Während nach dem Stand der Technik Lot beim Aufschieben des Mantelrohres immer irgendwie undefiniert verteilt wurde, läßt sich dies bei einem geschlitzten Mantelrohr vermeiden. Die gewünschte zu verlötende Umfangszone wird mit Lot, z. B. in Form von Pulver, Paste oder Folie, versehen und anschließend das an seinem Längsschlitz aufgespreitzte Mantelrohr ohne Verschmieren des Lotes aufgeschoben. Außerdem wird bei diesem Herstellungsverfahren ein Verknautschen oder Verformen der äußeren Lagen vermieden, welches sich insbesondere bei einem verkürzten Mantelrohr sehr negativ bemerkbar machen würde, da die verknautschten Lagen beidseitig undefiniert überstehen würden. Nach Aufheben der Aufspreitzung kann das Mantelrohr in einer geeigneten Kalibriervorrichtung exakt auf den gewünschten Durchmesser gebracht und beispielsweise durch einen Schweißpunkt fixiert werden. Die übrigen Fertigungsschritte werden von dieser Maßnahme nicht beeinträchtigt. Insbesondere können die Stirnseiten vorher oder nach diesen Schritten belotet werden. Eine anschließende vollständige Verschweißung des Längsschlitzes ist in vielen Fällen unnötig, da die Rohre des Abgassystems von beiden Seiten über das geschlitzte Mantelrohr bis zum Schweißpunkt geschoben werden können. In einem solchen Falle begünstigt der Längsschlitz sogar den Ausgleich von Fertigungstoleranzen, da er in gewissen Grenzen zusammengedrückt werden kann.Another particularly important feature, which in principle can also be realized without the features of the preceding claims, is specified in claim 4. Thereafter, the jacket tube has a slightly gaping longitudinal slot, which is preferably bridged by welding only in one area and is thereby fixed. As stated in claim 5, such a longitudinally slotted jacket tube enables the production of an exact, precisely defined soldered peripheral zone between the jacket tube and the outermost position of the catalyst carrier body in a particularly simple manner. While according to the prior art, solder was always distributed in an undefined manner when the jacket tube was pushed on, this can be avoided with a slotted jacket tube. The desired peripheral zone to be soldered is solder, e.g. B. in the form of powder, paste or foil, and then pushed on the jacket pipe spread on its longitudinal slot without smearing the solder. In addition, this Manufacturing process avoided a crumpling or deforming of the outer layers, which would have a very negative effect particularly in the case of a shortened jacket tube, since the crumpled layers would survive undefined on both sides. After the spreading has been removed, the jacket tube can be brought to the desired diameter exactly in a suitable calibration device and fixed, for example, by a welding point. The remaining manufacturing steps are not affected by this measure. In particular, the end faces can be soldered before or after these steps. A subsequent complete welding of the longitudinal slot is unnecessary in many cases, since the pipes of the exhaust system can be pushed from both sides over the slotted jacket pipe to the welding point. In such a case, the longitudinal slot even favors the compensation of manufacturing tolerances, since it can be compressed within certain limits.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt.An embodiment of the invention is shown in the drawing.

Der eigentliche Katalysator-Trägerkörper 1 besteht aus abwechselnden Lagen spiralig aufgewickelter glatter 2 und gewellter 3 Bleche. Auch anders strukturierte Bleche, die für Gas durchlässige Kanäle bilden, kommen für die vorliegende Erfindung in Betracht. Der Katalysator-Trägerkörper 1 ist stirnseitig bis zu einer Tiefe t₁ bzw. t₂ verlötet, wobei nicht unbedingt die gesamten Stirnflächen, sondern ggf. nur bestimmte Bereiche davon verlötet sein müssen. Umgeben wird der Katalysator-Trägerkörper 1 von einem verkürzten Mantelrohr 4, welches beidseitig mit einem Abstand a₁ bzw. a₂ vor den Stirnseiten endet. Die beiden Abstände a₁, a₂ müssen nicht notwendigerweise gleich groß sein. Das Mantelrohr 4 ist ganz oder vorzugsweise nur in einem schmalen Umfangsbereich 5 mit der äußersten Lage des Katalysator-Trägerkörpers 1 verlötet.The actual catalyst carrier body 1 consists of alternating layers of spirally wound smooth 2 and corrugated 3 sheets. Metal sheets with a different structure, which form channels which are permeable to gas, are also suitable for the present invention. The catalyst carrier body 1 is soldered on the end face to a depth t 1 or t 2, not necessarily the entire end faces, but possibly only certain areas thereof having to be soldered. The catalyst carrier body 1 is surrounded by a shortened jacket tube 4, which ends on both sides with a distance a₁ or a₂ in front of the end faces. The two distances a₁, a₂ need not necessarily be the same size. The casing tube 4 is completely or preferably only soldered to the outermost layer of the catalyst carrier body 1 in a narrow peripheral region 5.

Dabei kann das Mantelrohr 4 einen Längsschlitz 6 (der nicht unbedingt exakt in Längsrichtung verlaufen muß) aufweisen, welcher vorzugsweise an einer Stelle durch eine Schweißverbindung 7 fixiert ist.The casing tube 4 can have a longitudinal slot 6 (which does not necessarily have to run exactly in the longitudinal direction), which is preferably fixed at one point by a welded connection 7.

Durch die erfindungsgemäße Ausführung werden die verlöteten Stirnseiten nicht in ihrer thermischen radialen Wechseldehnung behindert, wodurch sich die Lebensdauer erhöht. Das geschlitzte Mantelrohr ermöglicht die präzise Festlegung und Herstellung eines schmalen verlöteten Umfangsbereiches, welcher dazu führt, daß auch Änderungen der Länge des Katalysator-Trägerkörpers nicht behindert werden, was sich ebenfalls günstig auf die Lebensdauer auswirkt. Zusätzlich verhindert das geschlitzte Mantelrohr ein Verknautschen oder Verschieben der äußersten Lagen beim Aufschieben, ohne daß es aufwendiger anderer Maßnahmen bedarf. Ein erfindungsgemäßer Katalysator-Trägerkörper mit verkürztem Mantelrohr eignet sich insbesondere für den Einsatz als Startkatalysator im motornahen Bereich unter hohen thermischen Wechselbelastungen.The design according to the invention does not impede the thermal radial alternating expansion of the soldered end faces, which increases the service life. The slotted jacket tube enables the precise fixing and production of a narrow soldered peripheral area, which means that changes in the length of the catalyst carrier body are not hindered, which also has a favorable effect on the service life. In addition, the slotted casing tube prevents the outer layers from being crumpled or shifted when being pushed on, without the need for complex other measures. A catalyst carrier body according to the invention with a shortened jacket tube is particularly suitable for use as a starting catalyst in the area near the engine under high thermal alternating loads.

Claims (5)

1. Metallischer Katalysator-Trägerkörper (1) mit einer aus strukturierten Blechen (2, 3) gebildeten, von Gas durchströmbaren Wabenstruktur, welche von einem Mantelrohr (4) umgeben ist, das kürzer als der KatalysatorTrägerkörper (1) ist, dadurch gekennzeichnet, daß der Katalysator-Trägerkörper (1) stirnseitig zumindest über einen Teil der Stirnflächen bis zu einer Tiefe (t₁, t₂), vorzugsweise einige Millimeter tief, verlötet ist und das Mantelrohr (4) in einem Abstand (a₁, a₂) vor beiden Stirnseiten endet, der größer als die Löttiefe (t₁, t₂) ist, vorzugsweise 5 bis 40 mm.1. Metallic catalyst carrier body (1) with a honeycomb structure formed by structured sheets (2, 3), through which gas can flow and which is surrounded by a jacket tube (4) which is shorter than the catalyst carrier body (1), characterized in that the catalyst carrier body (1) is soldered on the end face at least over part of the end faces to a depth (t 1, t 2), preferably a few millimeters deep, and the jacket tube (4) ends at a distance (a 1, a 2) in front of both end faces, which is greater than the soldering depth (t₁, t₂), preferably 5 to 40 mm. 2. Katalysator-Trägerkörper nach Anspruch 1, dadurch gekennzeichnet, daß das Mantelrohr (4) nur auf einer schmalen Umfangszone (5) mit der äußersten Lage des Katalysator-Trägerkörpers (1) verlötet ist.2. A catalyst carrier body according to claim 1, characterized in that the jacket tube (4) is soldered to the outermost layer of the catalyst carrier body (1) only on a narrow peripheral zone (5). 3. Katalysator-Trägerkörper nach Anspruch 1 oder 2, da­durch gekennzeichnet, daß das Mantelrohr (4) sich nur etwa über die verlötete Umfangszone (5) ringförmig erstreckt.3. catalyst carrier body according to claim 1 or 2, characterized in that the jacket tube (4) extends only approximately over the soldered circumferential zone (5) annular. 4. Katalysator-Trägerkörper, insbesondere nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß das Mantelrohr (4) einen geringfügig klaffenden Längsschlitz (6) aufweist, der vorzugsweise nur in einem oder mehreren kleinen Bereich(en) durch Schweißung(en) (7) überbrückt und fixiert ist.4. catalyst carrier body, in particular according to claim 1, 2 or 3, characterized in that the jacket tube (4) has a slightly gaping longitudinal slot (6), which is preferably only in one or more small area (s) by welding (s) (7) is bridged and fixed. 5. Verfahren zur Herstellung eines Katalysator-Trägerkörpers nach Anspruch 4, gekennzeichnet durch folgende Merkmale: a) Die äußerste Lage des fertig gewickelten Katalysator-­Trägerkörpers (1) und/oder die Innenseite des Mantelrohres (4) wird in der zu verlötenden Umfangszone (5) belotet, gegebenenfalls unter Zuhilfenahme von Haftkleber, Kleber oder Binder. b) Das längsgeschlitzte (6) Mantelrohr (4) wird unter Aufspreizung des Längsschlitzes (6) über den Katalysator-­Trägerkörper (1) in die vorgesehene Position geschoben und dann die Aufspreizung aufgehoben und der Schlitz zumindest an einer Stelle (7) verschweißt. c) Vor oder nach den Schritten a) und b) werden die Stirnseiten in an sich bekannter Weise ganz oder teilweise belotet. d) Der Katalysator-Trägerkörper (1) wird komplett mit Mantelrohr (4) gelötet. 5. A method for producing a catalyst carrier body according to claim 4, characterized by the following features: a) The outermost layer of the fully wound catalyst carrier body (1) and / or the inside of the jacket tube (4) is soldered in the peripheral zone (5) to be soldered, if necessary with the aid of pressure sensitive adhesive, glue or binder. b) The longitudinally slotted (6) casing tube (4) is pushed into the intended position by spreading the longitudinal slot (6) over the catalyst carrier body (1) and then the spreading is lifted and the slot is welded at least at one point (7). c) Before or after steps a) and b), the end faces are completely or partially soldered in a manner known per se. d) The catalyst carrier body (1) is completely soldered with the jacket tube (4).
EP88100077A 1987-01-15 1988-01-05 Metallic catalyst support having a short tubular casing Expired - Lifetime EP0277477B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88100077T ATE52836T1 (en) 1987-01-15 1988-01-05 METALLIC CATALYST CARRIER WITH SHORTENED JACKET.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3701052 1987-01-15
DE3701052 1987-01-15

Publications (2)

Publication Number Publication Date
EP0277477A1 true EP0277477A1 (en) 1988-08-10
EP0277477B1 EP0277477B1 (en) 1990-05-16

Family

ID=6318898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88100077A Expired - Lifetime EP0277477B1 (en) 1987-01-15 1988-01-05 Metallic catalyst support having a short tubular casing

Country Status (8)

Country Link
US (1) US4948353A (en)
EP (1) EP0277477B1 (en)
JP (1) JPS63176613A (en)
KR (1) KR960000483B1 (en)
AT (1) ATE52836T1 (en)
DE (1) DE3860155D1 (en)
ES (1) ES2014333B3 (en)
MX (1) MX170296B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2656376A1 (en) * 1989-12-22 1991-06-28 Rosi Ets EXHAUST, ESPECIALLY CATALYTIC, FOR BURNED GASES FROM INTERNAL COMBUSTION ENGINES.
DE102004015814A1 (en) * 2004-03-31 2005-10-20 Volkswagen Ag Exhaust gas purifying device for an internal combustion engine has an exhaust gas treatment unit (EGTU) and a tubular jacket made from a sheet metal plate for mounting the EGTU inside the jacket

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5403558A (en) * 1988-10-04 1995-04-04 Nippon Steel Corporation Heat and fatigue resistant metallic carrier for automobile exhaust gas-purifying catalyst
JPH02124215U (en) * 1989-03-24 1990-10-12
JPH0424611U (en) * 1990-06-19 1992-02-27
JPH0815559B2 (en) * 1990-11-13 1996-02-21 新日本製鐵株式会社 Race track type metal carrier for automobile exhaust gas catalyst with excellent thermal stress and thermal fatigue resistance
DE19704144A1 (en) * 1997-02-04 1998-08-06 Emitec Emissionstechnologie Extruded honeycomb body, in particular catalyst carrier body, with reinforced wall structure
DE10018640A1 (en) * 2000-04-14 2001-10-31 Emitec Emissionstechnologie Catalytic converter carrier body with sleeve and shortened jacket tube
DE10027807A1 (en) * 2000-06-05 2002-01-31 Emitec Emissionstechnologie Sheet with a barrier for a honeycomb body
DE10045540A1 (en) * 2000-09-13 2002-03-21 Emitec Emissionstechnologie Honeycomb body with shortened, slotted inner jacket tube
JP2003200060A (en) * 2002-01-10 2003-07-15 Calsonic Kansei Corp Metal-made catalyst carrier and manufacturing method therefor
JP2008045414A (en) * 2006-08-10 2008-02-28 Yamaha Marine Co Ltd Catalyst support structure
KR100901226B1 (en) * 2007-05-03 2009-06-08 오철주 Brazing method of diesel particulate filter
KR100901227B1 (en) * 2007-05-03 2009-06-08 오철주 Brazing method of diesel particulate filter
USD976571S1 (en) * 2019-11-15 2023-01-31 Make Great Sales Limited Straw carrying tube

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2746475A1 (en) * 1977-10-15 1979-04-19 Volkswagenwerk Ag Holder for catalytic exhaust gas purifier housing - has clamping band providing secure support even at high temperatures
FR2444793A1 (en) * 1978-12-23 1980-07-18 Sueddeutsche Kuehler Behr EXHAUST GAS PURIFICATION CARTRIDGE

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2924592C2 (en) * 1979-06-19 1983-05-26 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Method for producing a carrier matrix for a catalytic reactor for exhaust gas purification in internal combustion engines of motor vehicles
DE3037796C2 (en) * 1980-10-07 1983-06-30 Interatom Internationale Atomreaktorbau Gmbh, 5060 Bergisch Gladbach Method of soldering and its use
DE3603882A1 (en) * 1985-02-14 1986-08-14 Volkswagen AG, 3180 Wolfsburg Method of producing a metal supporting body for a converter for exhaust-gas purifying, and metal supporting body produced according to this method
DE3664361D1 (en) * 1985-07-25 1989-08-17 Interatom Mounting device for a metallic flue gas catalyst support body, and method of manufacturing it
DE3529654A1 (en) * 1985-08-19 1987-02-19 Interatom METHOD FOR SELECTIVE SOLDERING OF A METAL CATALYST SUPPORT BODY AND APPROPRIATELY PRODUCED CATALYST SUPPORT BODY
DE8605649U1 (en) * 1986-03-01 1986-04-17 Degussa Ag, 6000 Frankfurt Device for holding monolith catalysts
EP0245737B1 (en) * 1986-05-12 1989-08-23 INTERATOM Gesellschaft mit beschränkter Haftung Honeycomb body, particularly a catalyst carrier, provided with opposedly folded metal sheet layers, and its manufacturing process
EP0245738B1 (en) * 1986-05-12 1989-08-09 INTERATOM Gesellschaft mit beschränkter Haftung Metallic honeycomb body, particularly a catalyst carrier, provided with a supporting wall, and its manufacturing process
ES2041670T3 (en) * 1986-11-20 1993-12-01 Emitec Emissionstechnologie METALLIC CATALYST CARRYING BODY AND PROCEDURE FOR ITS MANUFACTURE.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2746475A1 (en) * 1977-10-15 1979-04-19 Volkswagenwerk Ag Holder for catalytic exhaust gas purifier housing - has clamping band providing secure support even at high temperatures
FR2444793A1 (en) * 1978-12-23 1980-07-18 Sueddeutsche Kuehler Behr EXHAUST GAS PURIFICATION CARTRIDGE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2656376A1 (en) * 1989-12-22 1991-06-28 Rosi Ets EXHAUST, ESPECIALLY CATALYTIC, FOR BURNED GASES FROM INTERNAL COMBUSTION ENGINES.
DE102004015814A1 (en) * 2004-03-31 2005-10-20 Volkswagen Ag Exhaust gas purifying device for an internal combustion engine has an exhaust gas treatment unit (EGTU) and a tubular jacket made from a sheet metal plate for mounting the EGTU inside the jacket

Also Published As

Publication number Publication date
ATE52836T1 (en) 1990-06-15
DE3860155D1 (en) 1990-06-21
KR960000483B1 (en) 1996-01-08
JPH0583728B2 (en) 1993-11-29
JPS63176613A (en) 1988-07-20
EP0277477B1 (en) 1990-05-16
KR880008831A (en) 1988-09-13
MX170296B (en) 1993-08-16
US4948353A (en) 1990-08-14
ES2014333B3 (en) 1990-07-01

Similar Documents

Publication Publication Date Title
EP0277477B1 (en) Metallic catalyst support having a short tubular casing
EP0435956B1 (en) Catalyst with a double casing system
EP0245738B1 (en) Metallic honeycomb body, particularly a catalyst carrier, provided with a supporting wall, and its manufacturing process
EP0673473B1 (en) Catalytic converter with two or more honeycomb elements inside a tubular shealth, and a method of manufacturing it
EP1490621B1 (en) Method for the production of a honeycomb body with a flange piece for a sensor and corresponding honeycomb body
EP0683851B1 (en) Metallic honeycomb structure supported in an inner and an outer casing tube, especially a catalyst support
EP0818615B1 (en) Catalyst housing
DE2434102A1 (en) CATALYST FOR THE CATALYTIC CLEANING OF EXHAUST GASES
EP2285560B1 (en) Metallic honeycomb body with defined connecting points
DE60118421T2 (en) Catalytic converter, process for its preparation and holding and sealing material for catalysts
EP0983425B1 (en) System for avoiding mechanical vibrations
EP1644620B1 (en) Method for producing a metal honeycomb structure
EP0988443B1 (en) Radial catalytic converter, in particular for small engines
EP3530898B1 (en) Exhaust system
EP1495216B1 (en) Catalyst support body with corrugated sleeve and method for production thereof
EP0812246A1 (en) Honeycombed body with only partial attachment to a protective tube
DE3926072A1 (en) Catalyser for purifying IC engine exhausts - has circumferential corrugation impressed into jacket surrounding catalyst support matrix
DE19646242C2 (en) Catalytic converter for a small engine
DE19881673B4 (en) Catalyst support body with exposed heat radiation surfaces
DE60207174T2 (en) Tapered ends for exhaust emission control devices and methods of manufacture
DE8717246U1 (en) Metallic catalyst carrier body with shortened jacket tube
DE2259817C2 (en) A method of manufacturing a catalyst device and a catalyst device manufactured according to the method
WO1998056503A1 (en) Metallic catalyst support for purifying an exhaust gas current, especially of a small engine
WO2001053668A1 (en) Catalyst support comprising an expandable collar provided with microstructures
DE19755703A1 (en) Catalytic converter support assembly

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19880906

17Q First examination report despatched

Effective date: 19881215

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19900516

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19900516

Ref country code: BE

Effective date: 19900516

REF Corresponds to:

Ref document number: 52836

Country of ref document: AT

Date of ref document: 19900615

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3860155

Country of ref document: DE

Date of ref document: 19900621

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19910105

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19910131

Ref country code: LI

Effective date: 19910131

Ref country code: CH

Effective date: 19910131

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 88100077.2

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19980122

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990106

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030106

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030116

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20030117

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030205

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040105

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040107

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040803

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040105

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040930

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050105

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20040107