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EP1247953A2 - A catalytic converter for an exhaust system - Google Patents

A catalytic converter for an exhaust system Download PDF

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Publication number
EP1247953A2
EP1247953A2 EP02007460A EP02007460A EP1247953A2 EP 1247953 A2 EP1247953 A2 EP 1247953A2 EP 02007460 A EP02007460 A EP 02007460A EP 02007460 A EP02007460 A EP 02007460A EP 1247953 A2 EP1247953 A2 EP 1247953A2
Authority
EP
European Patent Office
Prior art keywords
brick
predetermined breaking
catalyst
catalyst according
breaking point
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
EP02007460A
Other languages
German (de)
French (fr)
Other versions
EP1247953A3 (en
EP1247953B1 (en
Inventor
Karl Josef Dr.-Ing. Geratz
Kai Dipl.-Ing. Kettenring
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.)
Adam Opel GmbH
Original Assignee
Adam Opel GmbH
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 Adam Opel GmbH filed Critical Adam Opel GmbH
Publication of EP1247953A2 publication Critical patent/EP1247953A2/en
Publication of EP1247953A3 publication Critical patent/EP1247953A3/en
Application granted granted Critical
Publication of EP1247953B1 publication Critical patent/EP1247953B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • 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
    • F01N3/2857—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 the mats or gaskets being at least partially made of intumescent material, e.g. unexpanded vermiculite

Definitions

  • the invention relates to a catalyst the preamble of claim 1.
  • EP 0 684 097 is a catalyst of this type described.
  • the monolithic ceramic brick in the This publication describes how to hold the casing securely proposed the tubular casing around the brick pushed in together with the swelling mat narrow pinch folds. Still it can happen that the brick under the operating load, so high temperature with appropriate thermal expansion and vibrations caused by vehicle operation, breaks at undefined points, the Fragments the flow behavior of the catalyst change and thus impair its function.
  • DE 36 26 729 C2 includes a catalyst shown two bricks arranged one behind the other. at Such a catalyst is the danger of the brick breaking greatly reduced since the short bricks are only relatively small Apply bending forces in the event of vibrations. Indeed the production of such a catalyst is relative complex, even if, as described in DE 38 38 426 A1, Assembly aids are applied in the for assembly the two bricks in a shrink tube are connected to an inner package.
  • the invention has for its object a To create a catalyst of the type mentioned which is a monolithic ceramic brick of longer construction Can be used and even if it breaks Bricks remains functional, being opposite a multi-part brick is easier to assemble.
  • the predetermined breaking points on the circumference of the brick are relatively easy to manufacture, in which, for example, the still plastic blank of the brick, which in general is pressed from a clay-like mass as a strand, when cutting to length from the strand at the same time with indentations is provided.
  • This can be a circulating Act indentation, which then as a continuous Gutter is formed.
  • the impressions can also as punctual points arranged on a circumferential line Be deepened.
  • the Machining predetermined breaking points after the brick has hardened be introduced.
  • the scope of the Bricks only one predetermined breaking point may be provided. With a relatively long brick, however, several can Predetermined breaking points are provided.
  • Such reinforcement can advantageously be produced by a sheet metal part.
  • the invention also succeeds in the case of catalysts relatively long construction with a single ceramic Brick get along during assembly. Such a The catalyst is then also in the event of a break of the Bricks remain fully functional since the break is carried out in a controlled manner at a design location.
  • a catalyst Inside a metallic casing 1 a catalyst is a longitudinally flowed monolithic Ceramic brick 2 stored and from a swelling mat 3 between the brick 2 and the wall of the casing 1 supported.
  • the casing 1 is with a Inlet funnel 4 and an outlet funnel 5 provided.
  • the Brick 2 is on its periphery provided with a circumferential groove 6, which as Breakage point acts.
  • FIG. 2 shows another embodiment a brick 2, which is arranged on a circumferential line Has depressions 7, in their entirety form a predetermined breaking point.
  • the one-piece brick 2 can be assembled of the catalyst can be easily handled and positioned. With a heavy load, the Brick 2 will be on its Predetermined breaking point, namely along the channel 6 or Wells 7, break.

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

The monolithic ceramic matrix, referred to as a brick (2), is surrounded by one or more circumferential, intentional breaking location. Preferred Features: The intentional breaking location comprises a groove (6). It is an indentation (7) following a circumferential line around the surface. The location is central to the length of the ceramic. More such locations are included. The expansion mat (3) is made with reinforcements over the intentional breaking locations. This reinforcement comprises a metal sheet section.

Description

Die Erfindung betrifft einen Katalysator gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a catalyst the preamble of claim 1.

Mit EP 0 684 097 ist ein Katalysator dieser Art beschrieben. Um den monolithischen keramischen Brick im Mantelgehäuse sicher zu halten, wird mit dieser Druckschrift vorgeschlagen, das rohrförmige Mantelgehäuse um den zusammen mit der Quellmatte eingeschobenen Brick an seitlichen Quetschfalten zu verengen. Trotzdem kann es vorkommen, dass der Brick unter der Betriebsbelastung, also hoher Temperatur mit entsprechenden Wärmedehnungen und Erschütterungen hervorgerufen durch den Fahrzeugbetrieb, an nicht definierten Stellen zerbricht, wobei die Bruchstücke das Durchströmungsverhalten des Katalysators verändern und damit seine Funktion beeinträchtigen.EP 0 684 097 is a catalyst of this type described. For the monolithic ceramic brick in the This publication describes how to hold the casing securely proposed the tubular casing around the brick pushed in together with the swelling mat narrow pinch folds. Still it can happen that the brick under the operating load, so high temperature with appropriate thermal expansion and vibrations caused by vehicle operation, breaks at undefined points, the Fragments the flow behavior of the catalyst change and thus impair its function.

Mit DE 36 26 729 C2 ist ein Katalysator mit zwei hintereinander angeordneten Bricks dargestellt. Bei einem solchen Katalysator ist die Bruchgefahr des Bricks stark reduziert, da auf die kurzen Bricks nur relativ geringe Biegekräfte bei Erschütterungen einwirken. Allerdings ist die Herstellung eines solchen Katalysators relativ aufwendig, auch wenn, wie mit DE 38 38 426 A1 beschrieben, Montagehilfsmittel angewendet werden, in dem für die Montage die beiden Bricks in einem SchrumpfSchlauch zu einem Innenpaket verbunden sind.DE 36 26 729 C2 includes a catalyst shown two bricks arranged one behind the other. at Such a catalyst is the danger of the brick breaking greatly reduced since the short bricks are only relatively small Apply bending forces in the event of vibrations. Indeed the production of such a catalyst is relative complex, even if, as described in DE 38 38 426 A1, Assembly aids are applied in the for assembly the two bricks in a shrink tube are connected to an inner package.

Der Erfindung liegt die Aufgabe zugrunde, einen Katalysator der eingangs genannten Art zu schaffen, bei dem ein monolithischer keramischer Brick längerer Bauart Verwendung finden kann und der auch bei einem Bruch dieses Bricks funktionstüchtig bleibt, wobei er gegenüber einem mehrteiligen Brick einfacher montierbar ist.The invention has for its object a To create a catalyst of the type mentioned which is a monolithic ceramic brick of longer construction Can be used and even if it breaks Bricks remains functional, being opposite a multi-part brick is easier to assemble.

Die Erfindung löst diese Aufgabe mit den Merkmalen des Patentanspruches 1. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.The invention solves this problem with the features of claim 1. Advantageous further developments the invention are the subject of the dependent claims.

In dem der aus keramischem Material bestehende Brick etwa in der Mitte seiner Längserstreckung mit einer Sollbruchstelle versehen ist, wird er bei starker Belastung durch Schwingungen an dieser Stelle, an der sich ohnehin die größten Biegespannungen bilden, brechen. Ein Bruch an dieser Stelle beeinträchtigt aber die Funktion des Katalysators nicht. Der nun aus zwei Teilen bestehende Brick kann ohne weiteres die Abgase weiter führen. Auf die nun verkürzten Brick-Teile wirken sehr viel geringere Biegekräfte, so dass ein weiteres Zerbrechen dieser Teile nicht zu befürchten ist.In which consists of ceramic material Brick about in the middle of its length If the predetermined breaking point is provided, it will withstand heavy loads due to vibrations at this point, where anyway form the greatest bending stresses, break. On Break at this point affects the function not the catalyst. The now consisting of two parts Brick can easily carry the exhaust gases on. The shortened brick parts have a much smaller effect Bending forces, causing further breaking of this Parts are not to be feared.

Die Sollbruchstellen am Umfang des Bricks sind relativ leicht herstellbar, in dem beispielsweise der noch plastische Rohling des Bricks, welcher im Allgemeinen aus einer tonartigen Masse als Strang gepresst wird, beim Ablängen vom Strang gleichzeitig am Umfang mit Eindrückungen versehen wird. Dabei kann es sich um eine umlaufende Eindrückung handeln, die dann als durchgehende Rinne ausgebildet ist. Die Eindrückungen können jedoch auch als auf einer umlaufenden Linie angeordnete punktuelle Vertiefungen ausgebildet sein. Ebenso können die Sollbruchstellen nach dem Aushärten des Bricks spanend eingebracht werden.The predetermined breaking points on the circumference of the brick are relatively easy to manufacture, in which, for example, the still plastic blank of the brick, which in general is pressed from a clay-like mass as a strand, when cutting to length from the strand at the same time with indentations is provided. This can be a circulating Act indentation, which then as a continuous Gutter is formed. However, the impressions can also as punctual points arranged on a circumferential line Be deepened. Likewise, the Machining predetermined breaking points after the brick has hardened be introduced.

Vorteilhafterweise wird auf dem Umfang des Bricks jeweils nur eine Sollbruchstelle vorgesehen sein. Bei einem relativ langen Brick können jedoch auch mehrere Sollbruchstellen vorgesehen sein.Advantageously, the scope of the Bricks only one predetermined breaking point may be provided. With a relatively long brick, however, several can Predetermined breaking points are provided.

Zur Verbesserung der Lebensdauer des Katalysators kann es angebracht sein, die Quellmatte über den Sollbruchstellen zu verstärken. Eine solche Verstärkung ist vorteilhaft durch ein Blechteil herstellbar.To improve the life of the catalyst it may be appropriate to place the swelling mat over the To strengthen predetermined breaking points. Such reinforcement can advantageously be produced by a sheet metal part.

Durch die Erfindung gelingt es, auch bei Katalysatoren relativ langer Bauweise mit einem einzigen keramischen Brick bei der Montage auszukommen. Ein solcher Katalysator wird dann auch im Falle eines Bruchs des Bricks vollständig funktionsfähig bleiben, da der Bruch kontrolliert an einer konstruktiv vorgesehenen Stelle erfolgt.The invention also succeeds in the case of catalysts relatively long construction with a single ceramic Brick get along during assembly. Such a The catalyst is then also in the event of a break of the Bricks remain fully functional since the break is carried out in a controlled manner at a design location.

Ausführungsbeispiele der Erfindung sind nachstehend anhand einer Zeichnung näher beschrieben. Es zeigen

Fig. 1:
einen Katalysator im Schnitt;
Fig. 2:
einen keramischen Brick für einen Katalysator in perspektivischer Darstellung.
Embodiments of the invention are described below with reference to a drawing. Show it
Fig. 1:
a catalyst in section;
Fig. 2:
a ceramic brick for a catalyst in perspective.

Innerhalb eines metallischen Mantelgehäuses 1 eines Katalysators ist ein längsdurchströmter monolithischer keramischer Brick 2 gelagert und von einer Quellmatte 3 zwischen dem Brick 2 und der Wand des Mantelgehäuses 1 abgestützt. Das Mantelgehäuse 1 ist mit einem Einlauftrichter 4 und einem Auslauftrichter 5 versehen.Inside a metallic casing 1 a catalyst is a longitudinally flowed monolithic Ceramic brick 2 stored and from a swelling mat 3 between the brick 2 and the wall of the casing 1 supported. The casing 1 is with a Inlet funnel 4 and an outlet funnel 5 provided.

Wie Fig. 1 zeigt, ist der Brick 2 an seinem Umfang mit einer umlaufenden Rinne 6 versehen, die als Sollbruchstelle wirkt.As shown in Fig. 1, the Brick 2 is on its periphery provided with a circumferential groove 6, which as Breakage point acts.

Die Fig. 2 zeigt als weiteres Ausführungsbeispiel einen Brick 2, der auf einer Umfangslinie angeordnete Vertiefungen 7 aufweist, die in ihrer Gesamtheit eine Sollbruchstelle bilden.2 shows another embodiment a brick 2, which is arranged on a circumferential line Has depressions 7, in their entirety form a predetermined breaking point.

Der einteilige Brick 2 kann beim Zusammenbau des Katalysators leicht gehandhabt und positioniert werden. Bei einer starken Belastung wird der Brick 2 an seiner Sollbruchstelle, nämlich entlang der Rinne 6 bzw. der Vertiefungen 7, brechen.The one-piece brick 2 can be assembled of the catalyst can be easily handled and positioned. With a heavy load, the Brick 2 will be on its Predetermined breaking point, namely along the channel 6 or Wells 7, break.

Da an diesen Stellen konstruktiv Vorkehrungen getroffen werden können, z. B. durch Verstärkung der Quellmatte 3, wird durch einen solchen Bruch die Funktion des Katalysators und seine weitere Lebensdauer nicht beeinträchtigt. Because constructive precautions at these points can be hit, e.g. B. by reinforcing the Swelling mat 3, the function becomes due to such a break of the catalyst and its further lifespan is not impaired.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Mantelgehäusecover housing
22
BrickBrick
33
Quellmatteswelling mat
44
Einlauftrichterfeed hopper
55
Auslauftrichterdischarge hopper
66
Rinnegutter
77
Vertiefungenwells

Claims (7)

Katalysator für eine Abgasanlage einer Kraftfahrzeug-Brennkraftmaschine mit einem längsdurchströmten monolithischen keramischen Katalysator-Brick (2), einem den Brick (2) umschließenden Mantelgehäuse (1) mit jeweils einem Einlauf- (4) bzw. Auslauftrichter (5) an den Stirnseiten des Bricks (2) und einer Quellmatte (3) zwischen dem Brick (2) und der Wand des Mantelgehäuses (1), dadurch gekennzeichnet, dass der Brick (2) an seinem Umfang zumindest mit einer Sollbruchstelle versehen ist.Catalytic converter for an exhaust system of a motor vehicle internal combustion engine with a longitudinally flowed through monolithic ceramic catalyst brick (2), a casing (1) surrounding the brick (2), each with an inlet (4) or outlet funnel (5) on the end faces of the brick (2) and a swelling mat (3) between the brick (2) and the wall of the casing (1), characterized in that the brick (2) is provided with at least one predetermined breaking point on its circumference. Katalysator nach Anspruch 1, dadurch gekennzeichnet, dass die Sollbruchstelle als eine den Umfang des Bricks (2) umfangende Rinne (6) ausgebildet ist.Catalyst according to claim 1, characterized in that the predetermined breaking point is designed as a channel (6) encompassing the circumference of the brick (2). Katalysator nach Anspruch 1, dadurch gekennzeichnet, dass die Sollbruchstelle des Bricks (2) als auf einer Umfangslinie angeordnete Vertiefungen (7) an der Oberfläche des Bricks (2) ausgebildet ist.Catalyst according to claim 1, characterized in that the predetermined breaking point of the brick (2) is formed as depressions (7) arranged on a circumferential line on the surface of the brick (2). Katalysator nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass eine Sollbruchstelle vorgesehen ist, die, bezogen auf die Längserstreckung des Bricks (2), in der Mitte des Bricks (2) angeordnet ist.Catalyst according to one or more of claims 1 to 3, characterized in that a predetermined breaking point is provided, which is arranged in the middle of the brick (2) in relation to the longitudinal extent of the brick (2). Katalysator nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass über die Länge des Katalysator-Bricks (2) an dessen Umfang mehrere Sollbruchstellen angeordnet sind.Catalytic converter according to one or more of claims 1 to 3, characterized in that several predetermined breaking points are arranged over the length of the catalyst brick (2) on its circumference. Katalysator nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Quellmatte (3) über den Sollbruchstellen mit Verstärkungen ausgeführt ist.Catalyst according to one or more of claims 1 to 5, characterized in that the swelling mat (3) is provided with reinforcements over the predetermined breaking points. Katalysator nach Anspruch 6, dadurch gekennzeichnet, dass die Verstärkung durch ein Blechteil gebildet ist.Catalyst according to claim 6, characterized in that the reinforcement is formed by a sheet metal part.
EP02007460A 2001-04-07 2002-03-30 A catalytic converter for an exhaust system Expired - Lifetime EP1247953B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10117567 2001-04-07
DE10117567A DE10117567A1 (en) 2001-04-07 2001-04-07 Catalytic converter for an exhaust system

Publications (3)

Publication Number Publication Date
EP1247953A2 true EP1247953A2 (en) 2002-10-09
EP1247953A3 EP1247953A3 (en) 2003-07-02
EP1247953B1 EP1247953B1 (en) 2004-07-21

Family

ID=7680886

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02007460A Expired - Lifetime EP1247953B1 (en) 2001-04-07 2002-03-30 A catalytic converter for an exhaust system

Country Status (2)

Country Link
EP (1) EP1247953B1 (en)
DE (2) DE10117567A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006008114A1 (en) * 2004-07-16 2006-01-26 Faurecia Abgastechnik Gmbh Exhaust-gas purification device for motor vehicles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011056689A1 (en) 2011-12-20 2013-06-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Exhaust gas catalytic converter for use in exhaust gas after-treatment system of motor car, has catalyst element positioned in central region, where catalyst element or engine is heatable to defined temperature using heating device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3626729C2 (en) 1986-08-07 1992-01-02 Leistritz Ag, 8500 Nuernberg, De
EP0684097A1 (en) 1994-05-21 1995-11-29 Firma Schmitz + Brill Method of manufacturing au element for the exhaust system of a motor vehicle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2201710A5 (en) * 1972-10-03 1974-04-26 Peugeot & Renault

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3626729C2 (en) 1986-08-07 1992-01-02 Leistritz Ag, 8500 Nuernberg, De
EP0684097A1 (en) 1994-05-21 1995-11-29 Firma Schmitz + Brill Method of manufacturing au element for the exhaust system of a motor vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006008114A1 (en) * 2004-07-16 2006-01-26 Faurecia Abgastechnik Gmbh Exhaust-gas purification device for motor vehicles

Also Published As

Publication number Publication date
DE10117567A1 (en) 2002-10-10
EP1247953A3 (en) 2003-07-02
DE50200646D1 (en) 2004-08-26
EP1247953B1 (en) 2004-07-21

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