EP0450348B1 - Convertisseur catalytique pour moteurs à combustion interne - Google Patents

Convertisseur catalytique pour moteurs à combustion interne Download PDF

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Publication number
EP0450348B1
EP0450348B1 EP91103668A EP91103668A EP0450348B1 EP 0450348 B1 EP0450348 B1 EP 0450348B1 EP 91103668 A EP91103668 A EP 91103668A EP 91103668 A EP91103668 A EP 91103668A EP 0450348 B1 EP0450348 B1 EP 0450348B1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
housing
converter according
sealing ring
gas converter
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.)
Expired - Lifetime
Application number
EP91103668A
Other languages
German (de)
English (en)
Other versions
EP0450348A1 (fr
Inventor
Georg Dipl.-Ing. Reuther
Harald Dipl.-Ing. Bressler
Wolfgang Dipl.-Ing. Zahn
Gottfried Dipl.-Ing. Wollenhaupt
Hans-Dieter Dipl.-Ing. Schuster
Reiner Kreeb
Wolfgang Dipl.-Ing. Spieker
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.)
Tenneco GmbH
Original Assignee
Heinrich Gillet 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 Heinrich Gillet GmbH filed Critical Heinrich Gillet GmbH
Publication of EP0450348A1 publication Critical patent/EP0450348A1/fr
Application granted granted Critical
Publication of EP0450348B1 publication Critical patent/EP0450348B1/fr
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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • 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
    • 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
    • F01N3/2867—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 placed at the front or end face of catalyst body
    • 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
    • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
    • F01N2350/02—Fitting ceramic monoliths in a metallic housing

Definitions

  • the invention relates to an exhaust gas converter for internal combustion engines according to the preamble of claim 1 and as known for example from DE-A-34 32 283.
  • the catalytic monoliths reach temperatures of up to 870 degrees C during operation. At this temperature, the housings glow bright red. They must therefore be made from high quality stainless steel. Cheaper steels can be used if the housing is equipped with internal heat insulation.
  • the known exhaust gas converters in the area of the input and output cones are internally covered with insulating material, eg B. an aluminum silicate fiber mat. This is protected by metallic inner cones against the destructive effects of the pulsating exhaust gas flow.
  • the monoliths themselves are also stored in the housing with the help of insulating material and are fixed radially and axially.
  • a so-called swelling mat is predominantly used for this, which increases its volume when heated and thus compensates for the changes in diameter of the housing.
  • the inner cones are directly exposed to the exhaust gas flow. You will reach a high operating temperature. This requires a large thermal expansion. They must therefore be designed and dimensioned in a suitable manner to prevent damage to the catalytically active monolith without reducing the protection of the insulating and fixing materials against the pulsating exhaust gas flow.
  • the present invention has for its object to provide an exhaust gas converter of the type mentioned, which achieves optimal protection of the insulating materials from the exhaust gas pulsations with the least design, manufacturing and cost, without the thermal and acoustic insulation of the housing is deteriorated.
  • the fiber sealing ring closing the gap between the inner cone and monolith consists of one of the known materials such as metal, ceramic and / or mineral fibers in the form of mats, nonwovens, knitted fabrics or knitted fabrics. It is preferably also equipped with a stable metal or ceramic core.
  • the ring is profiled and mounted so that it holds the free ends of the inner cone. Due to the good internal damping of the ring, little acoustic energy is transmitted to the housing.
  • the sealing ring itself, d. H.
  • the material used, the type of processing into a knitted fabric or knitted fabric and the final shape is designed exclusively for an optimal sealing effect against the exhaust gas pulsations. By suitable selection and shaping, the exhaust gas pulsations can be reduced to such an extent that they cannot damage the insulating material in the housing cones or the swelling mat that fixes the monoliths axially and radially.
  • a kind of sliding seat with a labyrinth seal forms between the housing, the sealing ring and the inner cone, which easily compensates for the thermal changes in length of the components during operation.
  • 1 to 4 show sections and in a schematic representation of exhaust gas converters with different variants of polyfunctional fiber sealing rings, different tasks being performed depending on the design.
  • Fig. 1 shows a first embodiment.
  • a catalytically active monolith for example a ceramic honeycomb body, is supported in a sheet metal housing 3 with the aid of a swelling mat 2.
  • the housing 3 has on the input or output side a housing cone 4, the inside with insulating material 5, z.
  • B. an aluminum silicate fiber mat is thermally insulated.
  • a metallic inner cone 6 is provided, the free end 7.1 of which is bent radially outward for reinforcement.
  • a profiled fiber sealing ring 8.1 consisting of a knitted wire mesh is placed over the free end 7.1 of the inner cone 6. This prevents the free end 7.1 of the inner cone 6 from touching the housing 3 or the housing cone 4. As a result, the transmission of the acoustic energy of the exhaust gas flow to housing 3 and housing cone 4 is greatly reduced.
  • the ring also covers 8.1 the gap that must be maintained between the end 7.1 of the inner cone 6 and the end face of the monolith 1. Since the sealing ring 8.1 is dimensioned for optimal damping of the exhaust gas pulsations, both the source mat 2 and the insulating mat 5 are protected.
  • Fig. 3 shows an embodiment in which the free end 7.3 of the inner cone 6 is bent parallel to the housing 3. Thanks to a suitable profiling of the fiber sealing ring 8.3, the free end 7.3 of the inner cone 6 can slide in the ring 8.3 without losing contact with the ring 8.3. As a result, the free end 7.3 of the inner cone 6 is held and acoustically isolated from the housing 3, 4; the ring 8.3 itself no longer has to spring elastically in order to compensate for the thermal differences in axial expansion. As a result, it only has to be dimensioned for the task of reducing the pulsations and acoustically isolating the housing.
  • Fig. 4 shows an embodiment in which the free end 7.4 of the inner cone 6 is additionally bent like a barb. This makes it possible to mechanically hook a fiber sealing ring 8.4 to the inner cone 6 or the end 7.4 thereof, in order to reliably prevent it from migrating under the influence of the exhaust gas pulsations. If there are differences in expansion between housing 3, housing cone 4 and inner cone 6, the sealing ring 8.4 shifts accordingly.
  • the housing 3 is provided with a bead 10.

Landscapes

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

Claims (10)

  1. Convertisseur de gaz d'échappement pour moteurs à combustion interne, comportant un monolithe (1), fixé dans un carter en tôle (3) au moyen de ce que l'on appelle une natte gonflante (2) et pourvu d'un revêtement catalytique, avec au moins un cône de carter (4), prévu sur le carter (3), du côté entrée et/ou du côté sortie et doté intérieurement d'une isolation thermique réalisée au moyen d'un matériau isolant (5), avec au moins un cône intérieur (6), dont l'extrémité libre (7.1, 7.3, 7.4) se situe dans la zone de la face frontale du monolithe (1), un interstice de compensation des différences de dilatation thermique des éléments de construction (1...6) étant conservé, et avec un dispositif de protection (8), destiné à obturer cet interstice contre les effets pulsatoires des gaz d'échappement, caractérisé en ce que le dispositif de protection est réalisé sous forme d'une bague d'étanchéité en fibres (8.1 . . . 8.4) profilée, enchâssant l'extrémité libre (7.1, 7.3, 7.4) du cône intérieur (6), le soutenant contre le carter (3) ou le cône de carter (4), assurant, à la façon d'un siège coulissant, la compensation des variations dimensionnelles d'origine thermique et dimensionné pour donner un amortissement optimal des pulsations des gaz d'échappement.
  2. Convertisseur de gaz d'échappement selon la revendication 1, caractérisé en ce que l'extrémité libre (7.1) du cône intérieur (6) est repliée radialement vers l'extérieur.
  3. Convertisseur de gaz d'échappement selon la revendication 1, caractérisé en ce que l'extrémité libre (7.3, 7.4) du cône intérieur (6) est repliée parallèlement au carter (3).
  4. Convertisseur de gaz d'échappement selon l'une des revendications 1 à 3, caractérisé en ce que l'extrémité libre (7.4) du cône intérieur (6) est repliée à la façon d'un contre-crochet.
  5. Convertisseur de gaz d'échappement selon l'une des revendications 1 à 4, caractérisé en ce que le carter présente une moulure de maintien (10) dans la zone de la bague d'étanchéité en fibres (8).
  6. Convertisseur de gaz d'échappement selon l'une des revendications 1 à 5, caractérisé en ce que la bague d'étanchéité en fibres (8) est en fibres ou fils métalliques, se présentant sous la forme de natte, matelas, tricotage ou tissu à mailles.
  7. Convertisseur de gaz d'échappement selon l'une des revendications 1 à 5, caractérisé en ce que la bague d'étanchéité en fibres (8) est en fibres céramiques, se présentant sous la forme de natte ou matelas.
  8. Convertisseur de gaz d'échappement selon l'une des revendications 1 à 5, caractérisé en ce que la bague d'étanchéité en fibres (8) est en fibres minérales, se présentant sous la forme de natte ou matelas.
  9. Convertisseur de gaz d'échappement selon l'une des revendications 1 à 8, caractérisé en ce que la bague d'étanchéité en fibres (8) comporte un noyau stable en métal ou en céramique.
EP91103668A 1990-03-28 1991-03-11 Convertisseur catalytique pour moteurs à combustion interne Expired - Lifetime EP0450348B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4009945A DE4009945C2 (de) 1990-03-28 1990-03-28 Abgaskonverter für Brennkraftmaschinen
DE4009945 1990-03-28

Publications (2)

Publication Number Publication Date
EP0450348A1 EP0450348A1 (fr) 1991-10-09
EP0450348B1 true EP0450348B1 (fr) 1994-04-20

Family

ID=6403238

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91103668A Expired - Lifetime EP0450348B1 (fr) 1990-03-28 1991-03-11 Convertisseur catalytique pour moteurs à combustion interne

Country Status (3)

Country Link
EP (1) EP0450348B1 (fr)
DE (2) DE4009945C2 (fr)
ES (1) ES2055934T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003531994A (ja) * 2000-04-26 2003-10-28 ヨット エーバーシュペッヘル ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディトゲゼルシャフト 排ガス設備の排ガス装置、特にモジュール構成形式の自動車触媒装置

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5882608A (en) 1996-06-18 1999-03-16 Minnesota Mining And Manufacturing Company Hybrid mounting system for pollution control devices
DE19922954C5 (de) * 1999-05-19 2006-10-12 Belchem Fiber Materials Gmbh Verwendung von anorganischen Textilfaserwerkstoffen in Form von Gestricken und Rundnadelschläuchen in Abgaskonvertern für Brennkraftmaschinen
DE10107856A1 (de) * 2001-02-20 2002-08-29 Zeuna Staerker Kg Abgasreinigungsvorrichtung
DE10360669A1 (de) * 2003-12-23 2005-07-28 Daimlerchrysler Ag Abgasvorrichtung für eine Abgasnachbehandlungseinrichtung
US7323030B2 (en) * 2004-10-28 2008-01-29 Delphi Technologies, Inc. Apparatus and method for an exhaust aftertreatment device
DE102005002929A1 (de) 2005-01-21 2006-07-27 Emitec Gesellschaft Für Emissionstechnologie Mbh Faservlies zum Lagern eines Wabenkörpers in einer Abgasleitung
JP4663341B2 (ja) * 2005-01-25 2011-04-06 イビデン株式会社 排気ガス浄化装置のエンドコーン部用断熱材
DE102005058253B4 (de) * 2005-12-06 2007-10-04 Federal-Mogul Sealing Systems Gmbh Schutzschild zur thermischen und akustischen Abschirmung von Bauteilen einer Verbrennungskraftmaschine
FR2917779B1 (fr) * 2007-06-21 2015-05-15 Faurecia Sys Echappement Element de depollution pour ligne d'echappement des gaz d'un vehicule automobile.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2220921C2 (de) * 1972-04-28 1974-05-30 Zeuna-Staerker Kg, 8900 Augsburg Vorrichtung zur katalytischen reinigung der auspuffgase von brennkraftmaschinen
DE2341265C2 (de) * 1973-08-16 1983-10-20 Volkswagenwerk Ag, 3180 Wolfsburg Einrichtung zur katalytischen Abgasreinigung
IN141845B (fr) * 1973-09-26 1977-04-23 Engelhard Min & Chem
GB1507164A (en) * 1974-06-10 1978-04-12 Engelhard Min & Chem Apparatus for purifying gases
DE3432283A1 (de) * 1984-09-01 1986-03-13 LEISTRITZ Maschinenfabrik GmbH, 8500 Nürnberg Katalytische abgasentgiftungseinrichtung
DE3433938A1 (de) * 1984-09-15 1985-10-24 Bayerische Motoren Werke AG, 8000 München Abgaskonverter fuer brennkraftmaschinen
DE3626728A1 (de) * 1986-08-07 1988-02-18 Leistritz Ag Abgasreinigungsvorrichtung fuer kraftfahrzeuge
DE3729994A1 (de) * 1987-09-08 1989-03-16 Bischoff Erhardt Gmbh Co Kg Vorrichtung zum katalytischen reinigen von abgasen
DE3811224A1 (de) * 1988-04-02 1989-10-12 Leistritz Ag Abgaskatalysator mit metallmonolith

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003531994A (ja) * 2000-04-26 2003-10-28 ヨット エーバーシュペッヘル ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディトゲゼルシャフト 排ガス設備の排ガス装置、特にモジュール構成形式の自動車触媒装置

Also Published As

Publication number Publication date
DE59101417D1 (de) 1994-05-26
DE4009945C2 (de) 1996-11-14
ES2055934T3 (es) 1994-09-01
DE4009945A1 (de) 1991-10-02
EP0450348A1 (fr) 1991-10-09

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