WO2008141797A1 - Exhaust gas treatment device and method for the production of an exhaust gas treatment device - Google Patents
Exhaust gas treatment device and method for the production of an exhaust gas treatment device Download PDFInfo
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- WO2008141797A1 WO2008141797A1 PCT/EP2008/004020 EP2008004020W WO2008141797A1 WO 2008141797 A1 WO2008141797 A1 WO 2008141797A1 EP 2008004020 W EP2008004020 W EP 2008004020W WO 2008141797 A1 WO2008141797 A1 WO 2008141797A1
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- Prior art keywords
- treatment device
- assembly
- jacket
- edges
- insert
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Classifications
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- 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
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- 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
- F01N2450/02—Fitting monolithic blocks into 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
- F01N2450/22—Methods or apparatus for fitting, inserting or repairing different elements by welding or brazing
-
- 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
- F01N2470/00—Structure or shape of exhaust gas passages, pipes or tubes
Definitions
- the invention relates to an exhaust gas treatment device, in particular for an exhaust system of an internal combustion engine, with an insert flowed through by exhaust gas and an insert surrounding the elastic compensating element and a housing of the insert and compensating element enclosing housing of a metal sheet.
- the housing has a jacket wrapped around the assembly and exerts a clamping force on the assembly.
- the compensating element usually an elastic bearing mat, keeps the pressure-sensitive substrate under clamping in the housing. It is essential that uniform compressive forces are exerted on the circumference of the substrate so that it will not be damaged during installation or during later operation.
- the housing is made from a blank blank cut to size over the circumference of the insert and blanket mat assembly.
- the sheath blank is wound around the assembly with a tension such that a sufficient clamping action is exerted on the substrate.
- the jacket blank is wrapped so far around the assembly that the opposite edges of the jacket blank overlap on the circumference of the assembly (see Figures 1a and 1b).
- the tension of the wrap is determined, for example, over a predetermined value of a mat gap, the gap bulk density (GBD), or the pressure on the substrate. For the assembly to be held securely in the housing, this value must be achieved over much of the circumference.
- This technique has the disadvantage that at the point of overlap, the bearing mat is selectively compressed and therefore results in a jump in the load applied to the substrate. This leads to shearing forces in the substrate.
- the object of the invention is to provide an exhaust gas treatment device in which the clamping of the assembly in the housing takes place as uniformly as possible over the circumference.
- edges of the shell together for example, they can be welded together. This results in a simple, durable and temperature-resistant connection.
- the heat load of the compensating element during welding can be e.g. Reduce the fact that the abutting edges are covered by a cover which is welded on both sides of the abutting edges with the jacket.
- the cover portion may be a separate metal strip, which is a cost effective solution.
- the jacket then has in the region of the abutting edge a radially outwardly offset extension, which protrudes in the circumferential direction beyond the adjacent abutting edge and is welded to the opposite jacket section.
- a metal foil could also be arranged between the compensating element and the jacket in the area of the abutting edges.
- the compensation element is a bearing mat, as is known from standard applications.
- a method according to the invention for producing a bearing mat for producing a bearing mat
- Exhaust treatment device for example, an assembly of a gas-permeable insert and an insert surrounding the elastic compensating element is provided.
- a tailored to the dimensions of the assembly jacket blank with two opposing edges lying abutting edges is provided, and the
- Mantelzuites is wrapped in the circumferential direction around the assembly, so that a
- Housing is formed, which exerts a clamping force on the assembly.
- Jacket blank is wound so that in the finished housing, the abutting edges abut one another.
- Figures 1a and 1b is a schematic view of an exhaust gas treatment apparatus according to the prior art
- Figure 2 is a schematic section of an exhaust gas treatment apparatus according to a first embodiment of the invention
- FIG. 3 shows a schematic section of an exhaust gas treatment device according to a first variant of the embodiment according to the invention
- FIG. 4 shows a schematic detail of an exhaust gas treatment device according to a second variant of the embodiment according to the invention.
- FIG. 5 is a schematic section of a
- FIGS. 1a and 1b show a section of an exhaust gas treatment device 10 according to a conventional production method.
- the exhaust gas treatment device 10 is flowed through in the operation of exhaust gas, and the entrained in the exhaust pollutants are implemented there or filtered out.
- the technique described can be used, for example, for known catalysts,
- the jacket 16 has a one-piece blank with two edges located on opposite sides. To form the housing, the jacket is wrapped around the assembly of insert 12 and compensation element 14. In this case, the edges of the jacket blank overlap in a region 17. The edges are welded in this state in order to fix the jacket 16.
- the jacket 16 consists of a metal sheet of suitable thickness and is prefabricated with predetermined dimensions. Then the assembly of insert 12 and compensation element 14 is measured prior to canning. When wrapping, the overlap is adjusted until a defined mat gap, a predetermined GBD value or a predetermined pressure is reached.
- the two abutting edges 18, 20 are directly welded together in this example to fix the shell 116 and close the housing in the circumferential direction U.
- the jacket 116 is fixed by means of a covering section 122, which is laid over the abutting edges 18, 20 and welded to the regions of the jacket 116 adjoining the abutting edges 18, 20.
- the cover section 122 extends over the entire axial length of the abutting edges 18, 20.
- the cover portion of Figure 3 is formed integrally with the shell 116.
- One of the edges of the jacket 116, following the abutting edge 18, has an extension 124 which is offset outwards in the radial direction r and covers the portion of the jacket 116 adjoining the abutting edge 20. This eliminates one of the welds, which was necessary in the example of Figure 3.
- FIG. 5 shows a further alternative for reducing the thermal load on the compensating element 14.
- a strip 126 made of a metal foil, for example of aluminum or steel is placed under the abutting edges 18, 20.
- the abutting edges 18, 20 are welded directly to each other as in the example of FIG.
- the film strip 126 is very thin, so that no significant change in the mat gap occurs in the region of the film strip 126.
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- 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)
- Exhaust Silencers (AREA)
Abstract
Description
Abgasbehandlungsvorrichtung und Verfahren zur Herstellung einer Abgasbehandlungsvorrichtung Exhaust treatment device and method of manufacturing an exhaust treatment device
Die Erfindung betrifft eine Abgasbehandlungsvorrichtung, insbesondere für eine Abgasanlage einer Brennkraftmaschine, mit einem von Abgas durchströmten Einleger und einem den Einleger umgebenden elastischen Ausgleichselement sowie einem die Baugruppe aus Einleger und Ausgleichselement umschließenden Gehäuse aus einem Metallblech. Das Gehäuse weist einen um die Baugruppe gewickelten Mantel auf und übt eine Klemmkraft auf die Baugruppe aus.The invention relates to an exhaust gas treatment device, in particular for an exhaust system of an internal combustion engine, with an insert flowed through by exhaust gas and an insert surrounding the elastic compensating element and a housing of the insert and compensating element enclosing housing of a metal sheet. The housing has a jacket wrapped around the assembly and exerts a clamping force on the assembly.
Derartige Anordnungen sind Standard für das sogenannte Canning vonSuch arrangements are standard for the so-called canning of
Substraten, beispielsweise von Katalysatoren oder Partikelfiltern in Abgasreinigungsanlagen von Fahrzeugen. Das Ausgleichselement, meist eine elastische Lagermatte, hält dabei das druckempfindliche Substrat unter Klemmung im Gehäuse. Hierbei ist wesentlich, daß gleichmäßige Druckkräfte auf den Umfang des Substrats ausgeübt werden, damit dieses weder beim Einbau noch im späteren Betrieb beschädigt wird.Substrates, for example of catalysts or particulate filters in emission control systems of vehicles. The compensating element, usually an elastic bearing mat, keeps the pressure-sensitive substrate under clamping in the housing. It is essential that uniform compressive forces are exerted on the circumference of the substrate so that it will not be damaged during installation or during later operation.
In einer bekannten Technik wird das Gehäuse aus einem Mantelzuschnitt gefertigt, der mit Übergröße gegenüber dem Umfang der Baugruppe aus Einleger und Lagermatte zugeschnitten ist. Der Mantelzuschnitt wird mit einer solchen Spannung um die Baugruppe herum gewickelt, daß eine genügende Klemmwirkung auf das Substrat ausgeübt wird. Der Mantelzuschnitt wird dabei soweit um die Baugruppe gewickelt, daß die entgegengesetzten Ränder des Mantelzuschnitts auf dem Umfang der Baugruppe überlappen (siehe Figuren 1a und 1b). Die Spannung der Umwicklung wird zum Beispiel über einen vorbestimmten Wert eines Mattenspalts, der GBD (gap bulk density) oder des Drucks auf das Substrat bestimmt. Damit die Baugruppe sicher im Gehäuse gehalten ist, muß dieser Wert über einen Großteil des Umfangs erreicht werden. Diese Technik hat den Nachteil, daß an der Überlappungsstelle die Lagermatte punktuell zusammengedrückt wird und sich daher ein Sprung in der auf das Substrat ausgeübten Belastung ergibt. Dies führt zu Scherkräften im Substrat. Aufgabe der Erfindung ist es, eine Abgasbehandlungsvorrichtung zu schaffen, bei der die Klemmung der Baugruppe im Gehäuse möglichst gleichmäßig über den Umfang erfolgt.In one known technique, the housing is made from a blank blank cut to size over the circumference of the insert and blanket mat assembly. The sheath blank is wound around the assembly with a tension such that a sufficient clamping action is exerted on the substrate. The jacket blank is wrapped so far around the assembly that the opposite edges of the jacket blank overlap on the circumference of the assembly (see Figures 1a and 1b). The tension of the wrap is determined, for example, over a predetermined value of a mat gap, the gap bulk density (GBD), or the pressure on the substrate. For the assembly to be held securely in the housing, this value must be achieved over much of the circumference. This technique has the disadvantage that at the point of overlap, the bearing mat is selectively compressed and therefore results in a jump in the load applied to the substrate. This leads to shearing forces in the substrate. The object of the invention is to provide an exhaust gas treatment device in which the clamping of the assembly in the housing takes place as uniformly as possible over the circumference.
Dies wird erfindungsgemäß bei einer oben genannten Abgasbehandlungsvorrichtung erreicht, indem der Mantel so bemessen ist, daß in Umfangsrichtung die Stoßkanten bildenden Ränder des Mantels auf Stoß aneinanderliegen. Der Mantelzuschnitt wird also so auf den Umfang derThis is achieved according to the invention in an abovementioned exhaust gas treatment device in that the jacket is dimensioned such that in the circumferential direction the edges of the jacket forming the abutting edges butt against each other. The jacket blank is so so on the scope of
Baugruppe abgestimmt, daß bei der vorbestimmten, durch das Wickeln erreichten Spannung die Ränder exakt aneinanderliegen. So entsteht ein dichtes Gehäuse, ohne daß eine Überlappung notwendig ist. Durch das Vermeiden derMatched assembly that at the predetermined voltage reached by the winding, the edges abut each other exactly. The result is a dense housing, without an overlap is necessary. By avoiding the
Überlappung wird die punktuelle Belastung im Bereich der Ränder des Mantels deutlich reduziert.Overlapping, the punctual load in the area of the edges of the shell is significantly reduced.
Um die Ränder des Mantels aneinander zu befestigen, können diese zum Beispiel miteinander verschweißt werden. So ergibt sich eine einfache, haltbare und temperaturbeständige Verbindung.To attach the edges of the shell together, for example, they can be welded together. This results in a simple, durable and temperature-resistant connection.
Die Wärmebelastung des Ausgleichselements während des Schweißens läßt sich z.B. dadurch reduzieren, daß die Stoßkanten durch einen Abdeckabschnitt bedeckt werden, der beidseitig der Stoßkanten mit dem Mantel verschweißt ist.The heat load of the compensating element during welding can be e.g. Reduce the fact that the abutting edges are covered by a cover which is welded on both sides of the abutting edges with the jacket.
Der Abdeckabschnitt kann ein separater Metallstreifen sein, was eine kostengünstige Lösung darstellt.The cover portion may be a separate metal strip, which is a cost effective solution.
Zur Reduzierung der Anzahl der separaten Bauteile läßt sich derTo reduce the number of separate components can be the
Abdeckabschnitt auch durch einen Fortsatz des Mantels ausbilden. Der Mantel hat dann im Bereich der Stoßkante einen in radialer Richtung nach außen versetzten Fortsatz, der in Umfangsrichtung über die angrenzende Stoßkante hinausragt und mit dem gegenüberliegenden Mantelabschnitt verschweißt wird.Make cover also by an extension of the shell. The jacket then has in the region of the abutting edge a radially outwardly offset extension, which protrudes in the circumferential direction beyond the adjacent abutting edge and is welded to the opposite jacket section.
Um die Wärmebelastung zu verringern, könnte auch zwischen Ausgleichselement und Mantel im Bereich der Stoßkanten eine Metallfolie angeordnet sein.In order to reduce the heat load, a metal foil could also be arranged between the compensating element and the jacket in the area of the abutting edges.
Bevorzugt ist das Ausgleichselement eine Lagermatte, wie dies aus Standardanwendungen bekannt ist. In einem erfindungsgemäßen Verfahren zur Herstellung einerPreferably, the compensation element is a bearing mat, as is known from standard applications. In a method according to the invention for producing a
Abgasbehandlungsvorrichtung, wie sie beispielsweise oben beschrieben ist, wird eine Baugruppe aus einem gasdurchlässigen Einleger und einem den Einleger umgebenden elastischen Ausgleichselement bereitgestellt. Ein auf die Abmessungen der Baugruppe abgestimmter Mantelzuschnitt mit zwei an entgegengesetzten Rändern liegenden Stoßkanten wird bereitgestellt, und derExhaust treatment device, as described above, for example, an assembly of a gas-permeable insert and an insert surrounding the elastic compensating element is provided. A tailored to the dimensions of the assembly jacket blank with two opposing edges lying abutting edges is provided, and the
Mantelzuschnitt wird in Umfangsrichtung um die Baugruppe gewickelt, so daß einMantelzuschnitt is wrapped in the circumferential direction around the assembly, so that a
Gehäuse gebildet wird, das eine Klemmkraft auf die Baugruppe ausübt. DerHousing is formed, which exerts a clamping force on the assembly. Of the
Mantelzuschnitt wird dabei so gewickelt, daß im fertigen Gehäuse die Stoßkanten auf Stoß aneinanderliegen.Jacket blank is wound so that in the finished housing, the abutting edges abut one another.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung mehrerer Ausführungsbeispiele, mit Bezug auf die beigefügten Zeichnungen. In diesen zeigen:Further features and advantages of the invention will become apparent from the following description of several embodiments, with reference to the accompanying drawings. In these show:
Figuren 1a und 1b eine schematische Ansicht einer Abgasbehandlungsvorrichtung gemäß dem Stand der Technik;Figures 1a and 1b is a schematic view of an exhaust gas treatment apparatus according to the prior art;
Figur 2 einen schematischen Ausschnitt aus einer Abgasbehandlungsvorrichtung gemäß einer ersten Ausführungsform der Erfindung;Figure 2 is a schematic section of an exhaust gas treatment apparatus according to a first embodiment of the invention;
Figur 3 einen schematischen Ausschnitt aus einer Abgasbehandlungsvorrichtung gemäß einer ersten Variante der erfindungsgemäßen Ausführungsform;FIG. 3 shows a schematic section of an exhaust gas treatment device according to a first variant of the embodiment according to the invention;
Figur 4 einen schematischen Ausschnitt aus einer Abgasbehandlungsvorrichtung gemäß einer zweiten Variante der erfindungsgemäßen Ausführungsform; undFIG. 4 shows a schematic detail of an exhaust gas treatment device according to a second variant of the embodiment according to the invention; and
- Figur 5 einen schematischen Ausschnitt aus einer- Figure 5 is a schematic section of a
Abgasbehandlungsvorrichtung gemäß einer dritten Variante der erfindungsgemäßen Ausführungsform.Exhaust treatment device according to a third variant of the embodiment of the invention.
In den Figuren 1a und 1 b ist ein Ausschnitt einer Abgasbehandlungsvorrichtung 10 gemäß einem herkömmlichen Herstellungsverfahren gezeigt. Die Abgasbehandlungsvorrichtung 10 ist im Betrieb von Abgas durchströmt, und die im Abgas mitgeführten Schadstoffe werden dort umgesetzt oder ausgefiltert. Die beschriebene Technik läßt sich z.B. für bekannte Katalysatoren,FIGS. 1a and 1b show a section of an exhaust gas treatment device 10 according to a conventional production method. The exhaust gas treatment device 10 is flowed through in the operation of exhaust gas, and the entrained in the exhaust pollutants are implemented there or filtered out. The technique described can be used, for example, for known catalysts,
Partikelfilter, SCR-Vorrichtungen oder andere, auf einem Substrat basierende Abgasbehandlungsvorrichtungen anwenden.Apply particulate filters, SCR devices or other, based on a substrate exhaust treatment devices.
Eine Baugruppe aus einem aus einem porösen Substrat bestehenden Einleger 12 und einem den Einleger 12 umgebenden elastischen Ausgleichselement 14, zum Beispiel einer Lager- bzw. Stützmatte, ist von einem Gehäuse umgeben, das einen Mantel 16 aufweist. Der Mantel 16 hat einen einstückigen Zuschnitt mit zwei an entgegengesetzten Seiten liegenden Rändern. Zur Bildung des Gehäuses wird der Mantel um die Baugruppe aus Einleger 12 und Ausgleichselement 14 herumgewickelt. Dabei überlappen die Ränder des Mantelzuschnitts in einem Bereich 17. Die Ränder werden in diesem Zustand verschweißt, um den Mantel 16 zu fixieren.An assembly of an insert 12 consisting of a porous substrate and an elastic compensating element 14 surrounding the insert 12, for example a bearing or support mat, is surrounded by a housing which has a jacket 16. The jacket 16 has a one-piece blank with two edges located on opposite sides. To form the housing, the jacket is wrapped around the assembly of insert 12 and compensation element 14. In this case, the edges of the jacket blank overlap in a region 17. The edges are welded in this state in order to fix the jacket 16.
Der Mantel 16 besteht aus einem Metallblech geeigneter Dicke und wird mit vorbestimmten Abmessungen vorgefertigt. Dann wird die Baugruppe aus Einleger 12 und Ausgleichselement 14 vor dem Canning vermessen. Beim Umwickeln wird die Überlappung angepaßt, bis ein definierter Mattenspalt, ein vorbestimmter GBD-Wert oder ein vorbestimmter Druck erreicht ist.The jacket 16 consists of a metal sheet of suitable thickness and is prefabricated with predetermined dimensions. Then the assembly of insert 12 and compensation element 14 is measured prior to canning. When wrapping, the overlap is adjusted until a defined mat gap, a predetermined GBD value or a predetermined pressure is reached.
Nachteilig ist, daß im Bereich der Überlappung eine lokale, plötzlicheThe disadvantage is that in the region of the overlap a local, sudden
Änderung des Mattenspalts um den Wert der Manteldicke auftritt. Diese Änderung des Mattenspalts wirkt sich auch auf den lokalen GBD-Wert und den lokal auf den Einleger 12 ausgeübten Druck aus.Change of the mat gap by the value of the jacket thickness occurs. This change in the mat gap also affects the local GBD value and the pressure applied locally to the insert 12.
Eine gleichmäßigere Belastung wird nach dem erfindungsgemäßen Verfahren bei der in Figur 2 gezeigten erfindungsgemäßen Ausführungsform erreicht. Bei der Abgasbehandlungsvorrichtung 100 ist die Baugruppe aus Einleger 12 undA more uniform load is achieved by the method according to the invention in the embodiment according to the invention shown in Figure 2. In the exhaust treatment device 100, the assembly of inserts 12 and
Ausgleichselement 14 von einem Mantel 116 umgeben, dessen Abmessungen aus den Dimensionen der Baugruppe 12, 14 berechnet werden. Jedoch wird derCompensation element 14 surrounded by a shell 116, the dimensions of which are calculated from the dimensions of the assembly 12, 14. However, the
Mantelzuschnitt so angefertigt, daß er exakt dem gewünschten Umfang U des Gehäuses entspricht. Dies führt dazu, daß die entgegengesetzten Ränder 18, 20 des Mantelzuschnitts im fertigen Gehäuse bei dem gewünschten SpannungswertMantelzuschnitt made so that it corresponds exactly to the desired circumference U of the housing. This results in that the opposite edges 18, 20 of the jacket blank in the finished housing at the desired voltage value
(bestimmt zum Beispiel über errechneten Mattenspalt, GBD-Wert oder Druck) exakt auf Stoß aneinanderliegen. Es entsteht also beim Wickeln keine Überlappung der Ränder des Mantels 116. Daher kommt es an dieser Stelle auch nicht zu einer lokalen Veränderung des Drucks auf den Einleger 12.(determined, for example, over calculated mat gap, GBD value or pressure) exactly abut each other. So it does not arise when winding Overlapping the edges of the shell 116. Therefore, it does not come at this point to a local change in the pressure on the insert 12th
Die beiden Stoßkanten 18, 20 werden in diesem Beispiel direkt miteinander verschweißt, um den Mantel 116 zu fixieren und das Gehäuse in Umfangsrichtung U zu schließen.The two abutting edges 18, 20 are directly welded together in this example to fix the shell 116 and close the housing in the circumferential direction U.
Bei der in Figur 3 gezeigten Variante wird zur Verringerung der thermischen Belastung die Fixierung des Mantels 116 über einen Abdeckabschnitt 122 vorgenommen, der über die Stoßkanten 18, 20 gelegt wird und mit den an die Stoßkanten 18, 20 anschließenden Bereichen des Mantels 116 verschweißt wird. Der Abdeckabschnitt 122 erstreckt sich dabei über die gesamte axiale Länge der Stoßkanten 18, 20.In the variant shown in FIG. 3, in order to reduce the thermal load, the jacket 116 is fixed by means of a covering section 122, which is laid over the abutting edges 18, 20 and welded to the regions of the jacket 116 adjoining the abutting edges 18, 20. The cover section 122 extends over the entire axial length of the abutting edges 18, 20.
Bei der in Figur 4 gezeigten Variante ist der Abdeckabschnitt der Figur 3 einstückig mit dem Mantel 116 ausgebildet. Einer der Ränder des Mantels 116 weist im Anschluß an die Stoßkante 18 einen Fortsatz 124 auf, der in Radialrichtung r nach außen versetzt ist und den an die Stoßkante 20 anschließenden Abschnitt des Mantels 116 abdeckt. Hier entfällt eine der Schweißnähte, die im Beispiel der Figur 3 notwendig war.In the variant shown in Figure 4, the cover portion of Figure 3 is formed integrally with the shell 116. One of the edges of the jacket 116, following the abutting edge 18, has an extension 124 which is offset outwards in the radial direction r and covers the portion of the jacket 116 adjoining the abutting edge 20. This eliminates one of the welds, which was necessary in the example of Figure 3.
Figur 5 zeigt eine weitere Alternative zur Verringerung der thermischen Belastung des Ausgleichselements 14. In diesem Fall ist ein Streifen 126 aus einer Metallfolie, zum Beispiel aus Aluminium oder Stahl, unter die Stoßkanten 18, 20 gelegt. Die Stoßkanten 18, 20 werden wie im Beispiel der Figur 2 direkt miteinander verschweißt. Der Folienstreifen 126 ist sehr dünn, so daß keine wesentliche Änderung des Mattenspalts im Bereich des Folienstreifens 126 auftritt. FIG. 5 shows a further alternative for reducing the thermal load on the compensating element 14. In this case, a strip 126 made of a metal foil, for example of aluminum or steel, is placed under the abutting edges 18, 20. The abutting edges 18, 20 are welded directly to each other as in the example of FIG. The film strip 126 is very thin, so that no significant change in the mat gap occurs in the region of the film strip 126.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007023704.0 | 2007-05-22 | ||
| DE200710023704 DE102007023704A1 (en) | 2007-05-22 | 2007-05-22 | Exhaust treatment device and method of manufacturing an exhaust treatment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2008141797A1 true WO2008141797A1 (en) | 2008-11-27 |
| WO2008141797A8 WO2008141797A8 (en) | 2009-03-26 |
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ID=39684202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2008/004020 Ceased WO2008141797A1 (en) | 2007-05-22 | 2008-05-20 | Exhaust gas treatment device and method for the production of an exhaust gas treatment device |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102007023704A1 (en) |
| WO (1) | WO2008141797A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5293743A (en) * | 1992-05-21 | 1994-03-15 | Arvin Industries, Inc. | Low thermal capacitance exhaust processor |
| EP0837229A1 (en) * | 1996-10-15 | 1998-04-22 | Corning Incorporated | Method of making a catalytic converter for use in an internal combustion engine |
| WO1999013204A2 (en) * | 1997-09-08 | 1999-03-18 | Corning Incorporated | Method of manufacturing catalytic converter |
| WO2001079668A1 (en) * | 2000-04-15 | 2001-10-25 | Volkswagen Aktiengesellschaft | Device and method for producing a catalyst with a monolith having a polygonal cross-section |
| WO2002024297A2 (en) * | 2000-09-21 | 2002-03-28 | Arvin Technologies, Inc. | Apparatus and process for assembling exhaust processor components |
| WO2003008773A1 (en) * | 2001-06-29 | 2003-01-30 | Thyssenkrupp Stahl Ag | Sheathed mid-section of a catalyst housing |
-
2007
- 2007-05-22 DE DE200710023704 patent/DE102007023704A1/en not_active Withdrawn
-
2008
- 2008-05-20 WO PCT/EP2008/004020 patent/WO2008141797A1/en not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5293743A (en) * | 1992-05-21 | 1994-03-15 | Arvin Industries, Inc. | Low thermal capacitance exhaust processor |
| EP0837229A1 (en) * | 1996-10-15 | 1998-04-22 | Corning Incorporated | Method of making a catalytic converter for use in an internal combustion engine |
| WO1999013204A2 (en) * | 1997-09-08 | 1999-03-18 | Corning Incorporated | Method of manufacturing catalytic converter |
| WO2001079668A1 (en) * | 2000-04-15 | 2001-10-25 | Volkswagen Aktiengesellschaft | Device and method for producing a catalyst with a monolith having a polygonal cross-section |
| WO2002024297A2 (en) * | 2000-09-21 | 2002-03-28 | Arvin Technologies, Inc. | Apparatus and process for assembling exhaust processor components |
| WO2003008773A1 (en) * | 2001-06-29 | 2003-01-30 | Thyssenkrupp Stahl Ag | Sheathed mid-section of a catalyst housing |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007023704A8 (en) | 2009-04-02 |
| WO2008141797A8 (en) | 2009-03-26 |
| DE102007023704A1 (en) | 2008-11-27 |
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