WO2008141797A1 - Dispositif de traitement de gaz d'échappement, et procédé de production d'un tel dispositif - Google Patents

Dispositif de traitement de gaz d'échappement, et procédé de production d'un tel dispositif Download PDF

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Publication number
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
Authority
WO
WIPO (PCT)
Prior art keywords
treatment device
assembly
jacket
edges
insert
Prior art date
Application number
PCT/EP2008/004020
Other languages
German (de)
English (en)
Other versions
WO2008141797A8 (fr
Inventor
Stefan Schmidt
Stefan MERSCHKÖTTER
Manfred Stiglmair
Original Assignee
Emcon Technologies Germany (Augsburg) 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 Emcon Technologies Germany (Augsburg) Gmbh filed Critical Emcon Technologies Germany (Augsburg) Gmbh
Publication of WO2008141797A1 publication Critical patent/WO2008141797A1/fr
Publication of WO2008141797A8 publication Critical patent/WO2008141797A8/fr

Links

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
    • 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 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.

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)
  • Exhaust Silencers (AREA)

Abstract

Un dispositif de traitement de gaz d'échappement, en particulier pour un système de gaz d'échappement d'un moteur à combustion interne, présente une pièce d'insertion (12) parcourue par les gaz d'échappement, et un élément de compensation élastique (14) entourant la pièce d'insertion (12). Un boîtier en tôle, présentant une enveloppe (116) enroulée autour du composant, entoure l'ensemble comprenant la pièce d'insertion (12) et l'élément de compensation (14), et exerce une force de serrage sur ledit ensemble. L'enveloppe (116) est dimensionnée de façon qu'en direction périphérique, les bords de l'enveloppe (116) formant les arêtes (18, 20) prennent appui mutuellement par assemblage bout à bout.
PCT/EP2008/004020 2007-05-22 2008-05-20 Dispositif de traitement de gaz d'échappement, et procédé de production d'un tel dispositif WO2008141797A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007023704.0 2007-05-22
DE200710023704 DE102007023704A1 (de) 2007-05-22 2007-05-22 Abgasbehandlungsvorrichtung und Verfahren zur Herstellung einer Abgasbehandlungsvorrichtung

Publications (2)

Publication Number Publication Date
WO2008141797A1 true WO2008141797A1 (fr) 2008-11-27
WO2008141797A8 WO2008141797A8 (fr) 2009-03-26

Family

ID=39684202

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/004020 WO2008141797A1 (fr) 2007-05-22 2008-05-20 Dispositif de traitement de gaz d'échappement, et procédé de production d'un tel dispositif

Country Status (2)

Country Link
DE (1) DE102007023704A1 (fr)
WO (1) WO2008141797A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
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 (fr) * 1996-10-15 1998-04-22 Corning Incorporated Procédé de fabrication d'un pot catalytique pour un moteur à combustion interne
WO1999013204A2 (fr) * 1997-09-08 1999-03-18 Corning Incorporated Procede de fabrication d'un convertisseur catalytique pour moteur a combustion interne
WO2001079668A1 (fr) * 2000-04-15 2001-10-25 Volkswagen Aktiengesellschaft Procede et dispositif pour fabriquer un catalyseur monolithique de section polygonale
WO2002024297A2 (fr) * 2000-09-21 2002-03-28 Arvin Technologies, Inc. Dispositif et procédé d'assemblage de composants de module de retraitement des rejets
WO2003008773A1 (fr) * 2001-06-29 2003-01-30 Thyssenkrupp Stahl Ag Element central en forme d'enveloppe d'un boitier catalytique

Patent Citations (6)

* Cited by examiner, † Cited by third party
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 (fr) * 1996-10-15 1998-04-22 Corning Incorporated Procédé de fabrication d'un pot catalytique pour un moteur à combustion interne
WO1999013204A2 (fr) * 1997-09-08 1999-03-18 Corning Incorporated Procede de fabrication d'un convertisseur catalytique pour moteur a combustion interne
WO2001079668A1 (fr) * 2000-04-15 2001-10-25 Volkswagen Aktiengesellschaft Procede et dispositif pour fabriquer un catalyseur monolithique de section polygonale
WO2002024297A2 (fr) * 2000-09-21 2002-03-28 Arvin Technologies, Inc. Dispositif et procédé d'assemblage de composants de module de retraitement des rejets
WO2003008773A1 (fr) * 2001-06-29 2003-01-30 Thyssenkrupp Stahl Ag Element central en forme d'enveloppe d'un boitier catalytique

Also Published As

Publication number Publication date
DE102007023704A1 (de) 2008-11-27
DE102007023704A8 (de) 2009-04-02
WO2008141797A8 (fr) 2009-03-26

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