EP0437817A1 - Catalyst housing - Google Patents

Catalyst housing Download PDF

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Publication number
EP0437817A1
EP0437817A1 EP90125249A EP90125249A EP0437817A1 EP 0437817 A1 EP0437817 A1 EP 0437817A1 EP 90125249 A EP90125249 A EP 90125249A EP 90125249 A EP90125249 A EP 90125249A EP 0437817 A1 EP0437817 A1 EP 0437817A1
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EP
European Patent Office
Prior art keywords
beads
radius
mat
catalytic converter
converter housing
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EP90125249A
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German (de)
French (fr)
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EP0437817B1 (en
Inventor
Manfred Sagitzki
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Leistritz AG
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Leistritz AG
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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
    • 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
    • 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 gas passages, pipes or tubes
    • F01N2470/12—Tubes being corrugated

Definitions

  • the invention relates to a catalytic converter housing with conical exhaust gas supply and discharge ports and an essentially cylindrical central part for receiving the honeycomb-shaped carrier bodies, which are mechanically elastically supported and thermally insulated by spring mats, in particular a swelling mat.
  • the invention is therefore based on the object of designing a catalyst housing of the type mentioned in such a way that the stiffening beads on the one hand ensure the best possible stiffening function for the housing and on the other hand any risk of damage to the carrier body and the spring mat is avoided.
  • the central part is provided with wholly or partially circumferential corrugated beads, the inwardly curved inner beads being connected to one another by outwardly curved outer beads and the distance d between the inner beads being greater than them double radius R1 and approximately equal to or less than four times the radius R1
  • the beads are preferably round beads with an approximately circular arc-shaped cross section
  • other bead shapes such as trapezoidal, rectangular or combined shapes, can of course also be used, in which case the inscribed or rewritten circular arc should satisfy the above formula - there is an optimal compromise between the two contradicting demands for the best possible stiffening of the housing on the one hand and the prevention of damage to the carrier body.
  • the radius R2 of the outer bead can be chosen to be significantly smaller than the radius R1 of the inner bead, since in this way the point load on the carrier body is reduced with the same beading wavelength.
  • the configuration of the corrugated shafts according to the invention also results, inter alia, in an increase in the bending moment of the shell cross section of the two shell halves of the catalyst housing in the circumferential direction, which is particularly important in the non-circular catalyst housings which have been preferred recently.
  • the permissible / required mat pressing force on the monoliths / carrier bodies is also important.
  • the variables radii, length of the corrugation shaft and corrugation height
  • this mat pressing force can be adapted to the requirements using the variables mentioned.
  • FIG. 1 shows a catalytic converter housing 1 with a central section 2, to which a conical inlet funnel 3 and an equally conical outlet funnel (not shown) are connected.
  • a conical inlet funnel 3 and an equally conical outlet funnel (not shown) are connected.
  • the middle part 2 one or more catalyst carrier bodies 5 made of ceramic or metal are supported by a spring-elastic bearing mat 4, preferably a so-called swelling mat, the spring mat 4 preferably also extending over the area of the inlet and outlet funnels and in this area through an inner funnel 6 is covered.
  • this inner funnel 6 ends with a small gap distance in front of the end face 7 of the catalyst carrier body 5.
  • the central section 2 of the housing 1 is provided with corrugated beads such that inner beads 8 are connected to one another by outer beads 9.
  • the housing 1 is provided in addition to the corrugated beads 8, 9 in accordance with FIGS. 1 and 2 with a plurality of longitudinal stiffening beads 10 distributed over the circumference.
  • the longitudinal beads should preferably be located in the region of the (usually naturally rounded) corner edges of the housing.
  • the longitudinal infiltration prevents it from swinging through (accordion effect).
  • the corrugated beads themselves result in an increase in the bending moment of the shell cross section in the circumferential direction by the displacement of material from the bending line.
  • the greatest possible bead height should be aimed at, however cannot be sought in isolation, since the corrugation height is necessarily also linked to the radii of the outer and inner corrugations, so that ultimately the optimal geometry of the corrugated corrugations represents a compromise between partially contradicting individual requirements. Due to the basic specifications of the design formula in the claims, such an optimal compromise can be realized very quickly for every application.

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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)

Abstract

Catalyst housing (1) with conical exhaust gas feed and discharge connection pieces (3) and an essentially cylindrical central part (2) for accommodating the catalyst support bodies (5), which are mounted in such a way that they are held in mechanically elastic fashion and thermally insulated fashion by spring mats (4), in particular a so-called expanded mat, the central part (2) being provided at least over part of its length with corrugation beads either all or part of the way round, the inward-curved inner beads (8) being connected to one another by outward-curved outer beads (9) and the spacing d of the inner beads (8) being greater than twice their radius R1 and approximately equal to or less than four times the radius R1 4R1 @ d > 2R1.

Description

Die Erfindung bezieht sich auf ein Katalysator-Gehäuse mit konischen Abgaszu- und -abführstutzen und einem im wesentlichen zylindrischen Mittelteil zur Aufnahme der insbesondere wabenförmigen Trägerkörper, die durch Federmatten, insbesondere eine Quellmatte, mechanisch elastisch gehaltert und thermisch isoliert gelagert sind.The invention relates to a catalytic converter housing with conical exhaust gas supply and discharge ports and an essentially cylindrical central part for receiving the honeycomb-shaped carrier bodies, which are mechanically elastically supported and thermally insulated by spring mats, in particular a swelling mat.

Bei derartigen Katalysator-Gehäusen, die üblicherweise aus Stahlblech bestehen, sind zur Versteifung des möglichst dünnwandigen Gehäuses sowie zur besseren Verankerung und Halterung der Federmatte üblicherweise Sicken vorgesehen. Dabei ergibt sich allerdings die Schwierigkeit, daß durch diese Sicken örtliche Spannungsspitzen auf den Monolithen ausgeübt werden, die die Gefahr einer Beschädigung des Monolithen und der Federmatte mit sich bringen.In such catalyst housings, which usually consist of sheet steel, beads are usually provided to stiffen the thin-walled housing as well as to better anchor and hold the spring mat. However, there arises the difficulty that local stress peaks are exerted on the monoliths by these beads, which entail the risk of damage to the monolith and the spring mat.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Katalysator-Gehäuse der eingangs genannten Art so auszugestalten, daß die Versteifungssicken einerseits eine möglichst gute Versteifungsfunktion für das Gehäuse gewährleisten und andererseits möglichst jede Gefahr einer Beschädigung des Trägerkörpers und der Federmatte vermieden ist.The invention is therefore based on the object of designing a catalyst housing of the type mentioned in such a way that the stiffening beads on the one hand ensure the best possible stiffening function for the housing and on the other hand any risk of damage to the carrier body and the spring mat is avoided.

Zur Lösung dieser Aufgabe ist erfindungsgemäß vorgesehen, daß zumindest in einem Teilabschnitt das Mittelteil mit ganz oder teilweise umlaufenden Well-Sicken versehen ist, wobei die nach innen eingewölbten Innensicken durch nach außen gewölbte Außensicken miteinander verbunden sind und der Abstand d der Innensicken größer ist als ihr doppelter Radius R1 und etwa gleich oder kleiner als der vierfache Radius R1

Figure imgb0001
To achieve this object it is provided according to the invention that at least in a partial section the central part is provided with wholly or partially circumferential corrugated beads, the inwardly curved inner beads being connected to one another by outwardly curved outer beads and the distance d between the inner beads being greater than them double radius R1 and approximately equal to or less than four times the radius R1
Figure imgb0001

Durch die erfindungsgemäße Abmessung - bevorzugt sind die Sicken zwar runde Sicken mit etwa kreisbogenförmigem Querschnitt, doch können selbstverständlich auch andere Sickenformen, wie beispielsweise trapezförmige, rechteckförmige oder kombinierte Formen, verwendet werden, wobei dann der eingeschriebene bzw. umgeschriebene Kreisbogen der vorstehenden Formel genügen soll - ergibt sich ein optimaler Kompromiß zwischen den beiden gegensätzlichen Forderungen einer möglichst guten Versteifung des Gehäuses einerseits und der Verhinderung von Beschädigungen des Trägerkörpers. Dabei kann beispielsweise der Radius R2 der Außensicke wesentlich kleiner gewählt werden als der Radius R1 der Innensicke, da auf diese Weise die punktförmige Belastung auf den Trägerkörper bei gleicher Sicken-Wellenlänge verringert wird.Due to the dimensions according to the invention - although the beads are preferably round beads with an approximately circular arc-shaped cross section, other bead shapes, such as trapezoidal, rectangular or combined shapes, can of course also be used, in which case the inscribed or rewritten circular arc should satisfy the above formula - there is an optimal compromise between the two contradicting demands for the best possible stiffening of the housing on the one hand and the prevention of damage to the carrier body. For example, the radius R2 of the outer bead can be chosen to be significantly smaller than the radius R1 of the inner bead, since in this way the point load on the carrier body is reduced with the same beading wavelength.

Durch die erfindungsgemäße Ausbildung der Sickenwellen ergibt sich u.a. auch eine Erhöhung des Biegemoments des Schalenquerschnitts der beiden Schalenhälften des Katalysator-Gehäuses in Umfangsrichtung, was besonders bei den in neuester Zeit bevorzugt vorkommenden unrunden Katalysator-Gehäusen von besonderer Bedeutung ist. Durch den Versuch, die Form des Katalysators der entsprechenden Bodenform anzupassen und dabei Ausnehmungen oder Ausbuchtungen für Kardantunnel od.dgl. mit zu berücksichtigen, ergibt sich nämlich meist ein ovaler und häufig sogar noch unsymmetrischer Querschnitt der Katalysator-Gehäuse. Durch die kurzwellige Versickung und die Ausnutzung der theoretisch zulässigen Werkstoffdehnung werden die über die Matte auf die Trägerkörperoberfläche übertragenen Kräfte gleichmäßiger, so daß erhöhte Spannungsspitzen vermieden sind. Durch die bereits angesprochene Ausbildung der nach innen eingedellten, vorzugsweise gerundeten Innensicken mit einem größeren Radius als dem der Außensicken ist auch das Einschneiden der Innensicke in die Quellmatte praktisch ausgeschlossen.The configuration of the corrugated shafts according to the invention also results, inter alia, in an increase in the bending moment of the shell cross section of the two shell halves of the catalyst housing in the circumferential direction, which is particularly important in the non-circular catalyst housings which have been preferred recently. By trying to adapt the shape of the catalyst to the corresponding floor shape and thereby recesses or bulges for cardan tunnels or the like. To take into account, there is usually an oval and often even asymmetrical cross section of the catalyst housing. Due to the short-wave infiltration and the utilization of the theoretically permissible material expansion, the forces transmitted via the mat to the surface of the carrier body become more uniform, so that increased stress peaks are avoided. Due to the already mentioned formation of the indented, preferably rounded inner beads with a larger radius than that of the outer beads also practically precludes cutting the inner bead into the swelling mat.

In weiterer Ausgestaltung der Erfindung hat es sich dabei als besonders vorteilhaft erwiesen, die Ausbildung so zu treffen, daß die Gesamtsickenhöhe kleiner ist als die Differenz aus der zulässigen maximalen und minimalen Mattenverbaudicke. Durch eine möglichst weitgehende Ausnützung dieser Differenz aus minimaler und maximaler Mattenverbaudicke lassen sich relativ große Radien für die Sickehalbwellen erreichen, was wiederum die Versteifungsfunktion erheblich verbessert.In a further embodiment of the invention, it has proven to be particularly advantageous to make the design such that the overall bead height is less than the difference between the permissible maximum and minimum mat covering thickness. By using this difference between the minimum and maximum mesh cover thickness as far as possible, relatively large radii can be achieved for the bead half-waves, which in turn significantly improves the stiffening function.

Von Bedeutung ist auch die zulässige/erforderliche Mattenpreßkraft auf die Monolithe/Trägerkörper. Aus den Variablen (Radien, Länge der Sickenwelle und Sickenhöhe) resultiert ein theoretischer Matten-Einbauspalt mit einer entsprechenden Mattenpreßkraft. Je nach Kompressionsverhalten der Federmatte ist diese Mattenpreßkraft über die genannten Variablen den Erfordernissen anzupassen.The permissible / required mat pressing force on the monoliths / carrier bodies is also important. The variables (radii, length of the corrugation shaft and corrugation height) result in a theoretical mat installation gap with a corresponding mat pressing force. Depending on the compression behavior of the spring mat, this mat pressing force can be adapted to the requirements using the variables mentioned.

Schließlich liegt es auch noch im Rahmen der Erfindung, das Katalysatorgehäuse zusätzlich mit Versteifungs-Längssicken zu versehen, wobei diese Versteifungs-Längssicken vorzugsweise in den (gerundeten) Eckkanten nichtkreisrunder Katalysatorgehäuse liegen sollen.Finally, it is also within the scope of the invention to additionally provide the catalyst housing with longitudinal stiffening beads, wherein these longitudinal stiffening beads should preferably lie in the (rounded) corner edges of non-circular catalyst housing.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung zweier Ausführungsbeispiele sowie anhand der Zeichnung. Dabei zeigen:

Fig. 1
eine teilweise geschnittene Teillängsansicht eines erfindungsgemäßen Katalysatorgehäuses,
Fig. 2
einen vergrößerten Ausschnitt II aus Fig. 2 und
Fig. 3
einen Teilguerschnitt durch ein erfindungsgemäßes Katalysatorgehäuse mit zusätzlichen Längsversteifungssicken.
Further advantages, features and details of the invention result from the following description of two exemplary embodiments and from the drawing. Show:
Fig. 1
2 shows a partially sectioned longitudinal view of a catalyst housing according to the invention,
Fig. 2
an enlarged section II of Fig. 2 and
Fig. 3
a partial cross section through a catalyst housing according to the invention with additional longitudinal stiffening beads.

In Fig. 1 erkennt man ein Katalysatorgehäuse 1 mit einem Mittelabschnitt 2, an welchem sich ein konischer Eingangstrichter 3 und ein nicht gezeigter ebenso konischer Ausgangstrichter anschließen. Im Mittelteil 2 ist über eine federelastische Lagermatte 4, vorzugsweise eine sog. Quellmatte, ein oder mehrere Katalysatorträgerkörper 5 aus Keramik oder Metall gelagert, wobei die Federmatte 4 sich bevorzugt auch über den Bereich der Ein- und Ausgangstrichter erstreckt und in diesem Bereich durch einen Innentrichter 6 überdeckt ist. Im dargestellten Ausführungsbeispiel endet dieser Innentrichter 6 mit geringem Spaltabstand vor der Stirnfläche 7 des Katalysatorträgerkörpers 5. Der Mittelabschnitt 2 des Gehäuses 1 ist mit Well-Sicken derart versehen, daß Innensicken 8 durch Außensicken 9 miteinander verbunden sind. Dies bedeutet, daß nicht - wie beim Stand der Technik - beabstandete Sicken vorgesehen sind, die jeweils durch mehr oder weniger große ebene Gehäuseabschnitte voneinander getrennt sind, wobei üblicherweise beim Stand der Technik der Abstand der nach innen eingewölbten Innensicken erheblich größer war als der Durchmesser einer solchen Sicke.1 shows a catalytic converter housing 1 with a central section 2, to which a conical inlet funnel 3 and an equally conical outlet funnel (not shown) are connected. In the middle part 2, one or more catalyst carrier bodies 5 made of ceramic or metal are supported by a spring-elastic bearing mat 4, preferably a so-called swelling mat, the spring mat 4 preferably also extending over the area of the inlet and outlet funnels and in this area through an inner funnel 6 is covered. In the exemplary embodiment shown, this inner funnel 6 ends with a small gap distance in front of the end face 7 of the catalyst carrier body 5. The central section 2 of the housing 1 is provided with corrugated beads such that inner beads 8 are connected to one another by outer beads 9. This means that not - as in the prior art - spaced beads are provided, which are each separated from one another by more or less large flat housing sections, and in the prior art usually the distance between the inwardly curved beads was considerably larger than the diameter of one such a bead.

Entscheidend bei der Bemessung der Größen der Innensicken mit dem Radius R1 und der Außensicken mit dem Radius R2 ist zunächst, daß die Innensicken einen größeren Radius aufweisen als die Außensicken. Die umgekehrten Verhältnisse würden bei im wesentlichen gleicher Versteifung den Nachteil aufweisen, daß ja die nach innen eingewölbten Innensicken sich infolge ihres kleineren Durchmessers stärker in die Federmatte eindrücken und somit die Spannungsspitzen auf den Katalysatorträgerkörper 5 erhöht und die Federmatte zerstört würden. Der minimale Abstand muß dabei etwas größer sein als der doppelte Radius, da bei einem Abstand gleich dem doppelten Radius die Innensicke ja zu einer unendlich dünnen Singularität verkommen würde.It is decisive when dimensioning the sizes of the inner beads with the radius R1 and the outer beads with the radius R2 that the inner beads have a larger radius than the outer beads. The opposite would happen with essentially the same stiffening have the disadvantage that the inwardly bulging inner beads are more strongly pressed into the spring mat due to their smaller diameter and thus the stress peaks on the catalyst carrier body 5 are increased and the spring mat would be destroyed. The minimum distance must be somewhat larger than twice the radius, since with a distance equal to twice the radius, the inner bead would deteriorate to an infinitely thin singularity.

Dabei hat es sich bei den üblichen Blechstärken von ca. 1,5 mm der für Katalysatorbehäuse verwendeten Metallbleche als günstig erwiesen, wenn bei einem Mattenspalt (Nennspalt) von ca. 4,2 mm und einer Dicke der kalten Quellmatte von ca. 6 mm der Radius R1 der Innensicke etwa 4 mm beträgt.It has proven to be favorable with the usual sheet thicknesses of approx.1.5 mm of the metal sheets used for catalytic converter housings, if with a mat gap (nominal gap) of approx. 4.2 mm and a thickness of the cold swelling mat of approx. 6 mm Radius R1 of the inside bead is about 4 mm.

Bei dem in Fig. 3 dargestellten Teilquerschnitt ist das Gehäuse 1 zusätzlich zu den Well-Sicken 8, 9 entsprechend den Figuren 1 und 2 mit mehreren, über den Umfang verteilten Versteifungs-Längssicken 10 versehen. Bei den zur Anpassung an den Unterboden eines Kraftfahrzeugs häufig verwendeten unrunden Katalysatorgehäusen sollen sich die Längssicken bevorzugt im Bereich der (meist selbstverständlich gerundeten) Eckkanten des Gehäuses befinden.In the partial cross section shown in FIG. 3, the housing 1 is provided in addition to the corrugated beads 8, 9 in accordance with FIGS. 1 and 2 with a plurality of longitudinal stiffening beads 10 distributed over the circumference. In the non-circular catalytic converter housings frequently used to adapt to the underbody of a motor vehicle, the longitudinal beads should preferably be located in the region of the (usually naturally rounded) corner edges of the housing.

Die Längsversickung, deren Anwendung oder Nichtanwendung in erster Linie von der Monolithgeometrie und damit auch der Querschnittsform des Gehäuses abhängt, verhindert ein Durchschwingen (Ziehharmonika-Effekt). Die Well-Sicken selbst ergeben eine Erhöhung des Biegemoments des Schalenquerschnitts in Umfangsrichtung durch die Verlagerung von Werkstoff aus der Biegelinie. In diesem Zusammenhang ist eine möglichst große Sickenhöhe anzustreben, die jedoch nicht isoliert angestrebt werden kann, da die Sickenhöhe ja notwendig auch mit den Radien der Außen- und Innensicken verknüpft ist, so daß letztendlich die optimale Geometrie der Well-Sicken einen Kompromiß einander teilweise widersprechender Einzelanforderungen darstellt. Durch die grundsätzlichen Angaben der Bemessungsformel in den Patentansprüchen läßt sich ein derartiger Optimalkompromiß für jeden Anwendungsfall sehr rasch realisieren.The longitudinal infiltration, the use or non-use of which primarily depends on the monolith geometry and thus also the cross-sectional shape of the housing, prevents it from swinging through (accordion effect). The corrugated beads themselves result in an increase in the bending moment of the shell cross section in the circumferential direction by the displacement of material from the bending line. In this context, the greatest possible bead height should be aimed at, however cannot be sought in isolation, since the corrugation height is necessarily also linked to the radii of the outer and inner corrugations, so that ultimately the optimal geometry of the corrugated corrugations represents a compromise between partially contradicting individual requirements. Due to the basic specifications of the design formula in the claims, such an optimal compromise can be realized very quickly for every application.

Claims (4)

Katalysator-Gehäuse mit konischen Abgaszu- und -abführstutzen und einem im wesentlichen zylindrischen Mittelteil zur Aufnahme der Katalysatorträgerkörper, die durch Federmatten, insbesondere eine sog. Quellmatte, mechanisch elastisch gehaltert und thermisch isoliert gelagert sind, dadurch gekennzeichnet, daß zumindest in einem Teilabschnitt das Mittelteil mit ganz oder teilweise umlaufenden Well-Sicken versehen ist, wobei die nach innen eingewölbten Innensicken durch nach außen gewölbte Außensicken miteinander verbunden sind und der Abstand (d) der Innensicken größer ist als ihr doppelter Radius (R1) und etwa gleich oder kleiner als der vierfache Radius (R1)
Figure imgb0002
 Catalytic converter housing with conical exhaust gas inlet and outlet connections and an essentially cylindrical central part for receiving the catalyst carrier bodies, which are supported mechanically elastically and thermally insulated by spring mats, in particular a so-called swelling mat, characterized in that the central part is at least in one section is provided with wholly or partially circumferential corrugated beads, the inwardly curved inner beads being connected to one another by outwardly curved outer beads and the distance (d) between the inner beads being greater than their double radius (R1) and approximately equal to or less than four times Radius (R1)
Figure imgb0002
 Katalysator-Gehäuse nach Anspruch 1, dadurch gekennzeichnet, daß die Gesamtsickenhöhe kleiner ist als die Differenz aus der zulässigen minimalen und maximalen Mattenverbaudicke.Catalytic converter housing according to claim 1, characterized in that the total bead height is smaller than the difference from the permissible minimum and maximum mat covering thickness. Katalysator-Gehäuse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Innensickenradius (R1) größer ist als die kleinste Einbaumattendicke.Catalytic converter housing according to claim 1 or 2, characterized in that the inner bead radius (R1) is larger than the smallest built-in mat thickness. Katalysator-Gehäuse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß es zumindest im Bereich der Well-Sicken durch vorzugsweise in den Ecken nicht kreisrunder Profile liegenden Versteifungs-Längssicken versteift ist.Catalytic converter housing according to one of claims 1 to 3, characterized in that it is stiffened at least in the area of the corrugated beads by longitudinal stiffening beads preferably lying in the corners of non-circular profiles.
EP90125249A 1990-01-19 1990-12-21 Catalyst housing Expired - Lifetime EP0437817B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4001419A DE4001419C1 (en) 1990-01-19 1990-01-19 Exhaust gas catalyser - comprises corrugated housing with middle section having elastic mat, covering several catalyst supports
DE4001419 1990-01-19

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EP0437817A1 true EP0437817A1 (en) 1991-07-24
EP0437817B1 EP0437817B1 (en) 1992-10-14

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Cited By (2)

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FR2703105A1 (en) * 1993-03-26 1994-09-30 Ecia Equip Composants Ind Auto Device for catalytic purification of the exhaust gases of an engine, especially of a motor vehicle
DE102020129043A1 (en) 2020-11-04 2022-05-05 Mhg Fahrzeugtechnik Gmbh Device for flow against an exhaust gas purification element

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Publication number Priority date Publication date Assignee Title
DE3926072C2 (en) * 1989-08-07 1994-01-13 Emitec Emissionstechnologie Exhaust gas purification catalyst with elastic elements to compensate for longitudinal expansion
DE4218198C2 (en) * 1992-06-03 1994-08-18 Manfred Sagitzki Catalytic converter housing
DE19743196A1 (en) * 1997-09-30 1999-04-01 Emitec Emissionstechnologie Automotive catalytic converter has mantle lining compensating for differential radial forces
BR9812396A (en) 1997-09-30 2000-09-12 Emitec Emissionstechnologie Beehive body arrangement with support sections
DE102004058268B4 (en) * 2003-12-11 2016-05-19 Continental Automotive Gmbh Reinforced housing of an exhaust gas purification component
DE102018212660A1 (en) * 2018-07-30 2020-01-30 Audi Ag Housing for an exhaust gas cleaning device, exhaust gas cleaning device and method for producing an exhaust gas cleaning device

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GB1148540A (en) * 1965-12-24 1969-04-16 Alusuisse Sheathing element
US4020539A (en) * 1973-03-19 1977-05-03 Chrysler Corporation Catalytic reactor for automobile
US4335078A (en) * 1977-09-13 1982-06-15 Nissan Motor Company, Limited Catalytic reactor for automotive exhaust line
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FR2703105A1 (en) * 1993-03-26 1994-09-30 Ecia Equip Composants Ind Auto Device for catalytic purification of the exhaust gases of an engine, especially of a motor vehicle
DE102020129043A1 (en) 2020-11-04 2022-05-05 Mhg Fahrzeugtechnik Gmbh Device for flow against an exhaust gas purification element

Also Published As

Publication number Publication date
EP0437817B1 (en) 1992-10-14
DE4001419C1 (en) 1991-06-13
DE59000362D1 (en) 1992-11-19

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