EP1287237B1 - Tube de protection a moulures thermo-isolantes - Google Patents

Tube de protection a moulures thermo-isolantes Download PDF

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Publication number
EP1287237B1
EP1287237B1 EP01949350A EP01949350A EP1287237B1 EP 1287237 B1 EP1287237 B1 EP 1287237B1 EP 01949350 A EP01949350 A EP 01949350A EP 01949350 A EP01949350 A EP 01949350A EP 1287237 B1 EP1287237 B1 EP 1287237B1
Authority
EP
European Patent Office
Prior art keywords
zone
jacket tube
casing tube
honeycomb body
face
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
EP01949350A
Other languages
German (de)
English (en)
Other versions
EP1287237A1 (fr
Inventor
Rolf BRÜCK
Peter Hirth
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.)
Vitesco Technologies Lohmar Verwaltungs GmbH
Original Assignee
Emitec Gesellschaft fuer Emissionstechnologie mbH
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 Emitec Gesellschaft fuer Emissionstechnologie mbH filed Critical Emitec Gesellschaft fuer Emissionstechnologie mbH
Publication of EP1287237A1 publication Critical patent/EP1287237A1/fr
Application granted granted Critical
Publication of EP1287237B1 publication Critical patent/EP1287237B1/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
    • 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
    • F01N3/2842—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration specially adapted for monolithic supports, e.g. of honeycomb type
    • 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
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • 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

Definitions

  • the present invention relates to a jacket tube, in particular for a honeycomb body for exhaust gas treatment, according to the preamble of claim 1.
  • the present invention also relates to a catalytic converter with a jacket tube according to the preamble of claim 8.
  • Such catalytic converters are preferably in a Used exhaust system of an internal combustion engine.
  • the emission behavior of the exhaust system after the cold start of the internal combustion engine is in the foreground.
  • catalytic converters are used for the purification of the exhaust gas.
  • the catalytic converters have a catalytically active surface which causes a chemical conversion of the pollutants in the exhaust gas (for example carbon monoxide, hydrocarbon, nitrogen oxide) above a certain temperature (about 250 ° C.). It is important to minimize the time to reach this light-off temperature of the catalytic converter.
  • a catalytic converter for purifying exhaust gases of an internal combustion engine of a motor vehicle with a carrier matrix of bonded metal foils and a jacket tube is known.
  • the jacket tube has near its end faces a smaller inner diameter, as in a central region.
  • the carrier matrix is fixed by the frontal areas of the jacket tube with a smaller inner diameter, wherein an additional welding or soldering connection is proposed for securing this press connection.
  • the catalytic converter Due to the larger inner diameter in the central region of the jacket tube, the catalytic converter has a circumferential free space in the central region. This space serves as an insulation damper, which prevents heat transfer from the carrier matrix to the jacket tube in this area.
  • the known catalytic converter is flowed through by the hot exhaust gas of the internal combustion engine, wherein, in particular in the cold start phase, a temperature gradient forms from the gas inlet side to the gas outlet side.
  • the carrier matrix first reaches the required starting temperature of about 250 ° C. near the gas inlet side.
  • the catalytic reaction is exothermic, that is, with the release of thermal energy, which additionally heats downstream regions of the support matrix. This heating behavior was not taken into account in the symmetrical design of the known catalytic converter.
  • Object of the present invention is to provide a jacket tube for a catalytic converter, which improves the cold start behavior of the catalytic converter and allows a permanent connection of jacket tube and catalyst carrier body.
  • the jacket tube according to the invention for a honeycomb body for exhaust gas treatment has a first zone near a first end face and a third zone near a second end face, wherein the jacket tube has a first inner diameter in the first and third zones. Furthermore, the jacket tube has a second zone, which is arranged between the first and the third zone, wherein the second zone has a second inner diameter, which is greater than the first inner diameter.
  • the jacket tube according to the invention is characterized in that the first zone has an axial length less than 5 mm. Preferably, the first zone is designed with an axial length less than 3 mm.
  • the first and the third zone with the smaller first inner diameter allow, for example, a technical joining of the jacket tube with a support body, if this is designed so that it has contact with the jacket tube in these zones.
  • the technical joining connection can be produced, for example, by a known soldering method.
  • the first zone Due to the temperature profile when heating a catalytic converter in an exhaust system, the first zone is made relatively narrow. This has the consequence that the contact of jacket tube and carrier matrix near the first end face is limited to a few millimeters, wherein a heat dissipation is reduced from the carrier body to the jacket tube.
  • the first zone of the jacket tube has a length of at least 1.5 mm.
  • Such jacket pipes are used in particular in catalytic converters in an exhaust system of an internal combustion engine.
  • the jacket tube and the catalyst carrier body is subject to high dynamic and thermal stress. So that the first zone ensures a permanent fixation of the support body in the jacket tube, at least a length of 1.5 mm is required for the design of a technical joining connection.
  • the second zone has an extension of 10 to 40 mm.
  • the second zone has an extension of 10 to 20 mm.
  • the extent of the second zone of the jacket tube defines the region in which the contact of the catalyst carrier body with the jacket tube is prevented and thus also a heat discharge is prevented. Since the carrier body heats up rapidly due to the exothermic reactions in a catalytic reaction, it is sufficient to interrupt the contact of the carrier body and jacket tube only at the point near which the light-off temperature is reached after a short period of time.
  • the second inner diameter is at least 0.4 mm, preferably 2 mm, larger than the first inner diameter.
  • the distance between the jacket tube and a catalyst carrier body in the second zone is defined.
  • the catalyst carrier body expands in the second zone during the cold start phase due to the increasing temperature.
  • at least a radial distance of 0.2 mm is required.
  • the axial extent of the second zone is at least five times, preferably at least ten times, as great as the difference between the first and the second inner diameter. This means, for example, that at a second inner diameter, which is 2 mm larger than the first inner diameter, the axial extent of the second zone is at least 10, preferably at least 20 mm.
  • the third zone has an axial extent, wherein the axial extent is greater than the length of the first zone and / or the extent of the second zone.
  • the third zone is therefore made relatively wide, whereby a permanent joining connection in the third zone is ensured with a catalyst carrier body. It is particularly advantageous if the third zone has an axial extent of 10 to 50 mm.
  • the jacket tube has a thickness of 0.1 to 1.5 mm. This small thickness has the advantage that the jacket tube is a lower thermal mass.
  • a catalytic converter is proposed with the jacket tube according to the invention, in particular for use in a Exhaust system of an internal combustion engine is suitable.
  • the catalytic converter has a honeycomb body of sheet metal layers, wherein the honeycomb body is at least partially structured so that it can be flowed through by an exhaust gas in a flow direction.
  • the first zone of the jacket tube is arranged near an inlet end face and the third zone near an outlet end face of the catalytic converter.
  • the honeycomb body is joined by joining technology in the first and the third zone with the jacket tube.
  • the catalytic converter Due to the flow direction of the exhaust gas, the catalytic converter has a hotter inlet side in the cold start phase.
  • the jacket tube is thus aligned so that the first zone is arranged close to the inlet side of the catalytic converter.
  • the honeycomb body absorbs heat through the exhaust gas flowing through it and heats up. Due to the flow behavior of the exhaust gas, radially outermost regions of the honeycomb body are only flowed through by a relatively small amount of the exhaust gas, as a result of which the heating of these regions is slowed down.
  • the first zone of the jacket tube is made relatively narrow, whereby the contact of the jacket tube is reduced with the honeycomb body.
  • This narrow contact area is ensured even with a jacket tube, which projects beyond the inlet end face of the honeycomb body. It extends in this embodiment of the entrance end face of the honeycomb body to the second zone of the jacket tube. A faster heating of the honeycomb body near the entrance end face is guaranteed.
  • a cavity with air is arranged in the second zone between the jacket tube and the honeycomb body.
  • the cavity with air serves as an insulator, which prevents heat transfer from the heating honeycomb body to the still cool jacket tube.
  • the jacket tube 1 shows a perspective view of the jacket tube 1 according to the invention with a first zone 2 near a first end face 10 and a third zone 4 near a second end face 11.
  • the jacket tube 1 has a first inner diameter 8 in the first zone 2 and the third zone 4
  • the jacket tube 1 has a second zone 3, which is arranged between the first zone 2 and the third zone 4.
  • the second inner diameter 9 of the second zone 3 is greater than the first inner diameter 8.
  • the first zone 2 has an axial length 19 of less than 5 mm, preferably less than 3 mm.
  • the first zone 2 is followed by the second zone 3 with an axial extension 19, wherein the extension 6 is between 10 and 40 mm.
  • the third zone 4 has an axial extension 7 which is greater than the length 5 of the first zone 2 and / or the extension 6 of the second zone 3.
  • FIG. 2 shows a longitudinal section through an embodiment of a catalytic converter with a jacket tube 1 and a honeycomb body 12.
  • the honeycomb body 12 can be traversed by an exhaust gas in a flow direction 13.
  • the catalytic converter has an entrance end face 16 and an exit end face 17.
  • the jacket tube 1 is so arranged that the first zone 2 is arranged near the entrance end face 16.
  • a joining connection 14 with the honeycomb body 12 is formed.
  • the illustrated honeycomb body 12 has sheet metal layers 18, which are at least partially structured so that the honeycomb body 12 can be flowed through for an exhaust gas. For this reason, it is particularly advantageous to perform the joining connection 14 with a Belotungsmaschinen.
  • the second zone 3 connects with a cavity 15 between the honeycomb body 12 and jacket tube 1 at.
  • This cavity is preferably filled with air, which prevents heat transfer from the honeycomb body 12 to the jacket tube 1 in the region of the second zone 3.
  • the distance 21 between the honeycomb body 12 and jacket tube 3 is chosen so that even with a thermal expansion of the honeycomb body 12, contact with the jacket tube 1 in the second zone 3 is prevented.
  • the third zone 4 extends from the second zone 3 to the exit end face 17.
  • a joining connection 14 of the jacket tube 1 with the honeycomb body 12 does not extend over the entire axial 19 extent 7 of the third zone. 4
  • the jacket tube is designed with a thickness 20 of 0.01 to 1.5 mm, whereby the heat capacity of the jacket tube 1 is reduced.
  • the jacket tube 1 thus has a lower thermal mass and ensures rapid heating in the cold start phase of a catalytic converter.

Claims (10)

  1. Tube d'enveloppe pour un corps en nids d'abeilles (12) pour le traitement de gaz d'échappement, avec une première zone (2) à proximité d'une première face frontale (10) et une troisième zone (4) à proximité d'une deuxième face frontale (11), dans quel cas le tube d'enveloppe (1) a un premier diamètre intérieur (8) dans la première (2) et la troisième zone (4) et a en outre une deuxième zone (3) qui est agencée entre la première (2) et la troisième zone (4), la deuxième zone (3) ayant un deuxième diamètre intérieur (9) qui est plus grand que le premier diamètre intérieur (8), caractérisé en ce que la première zone (2) a une longueur (5) axiale (19) plus petite que 5 mm, de préférence plus petite que 3 mm.
  2. Tube d'enveloppe selon la revendication 1, caractérisé en ce que la première zone (2) du tube d'enveloppe (1) a une longueur (5) axiale (19) d'au moins 1,5 mm.
  3. Tube d'enveloppe selon la revendication 1 ou 2, caractérisé en ce que la deuxième zone (3) a une étendue (6) axiale (19) de 10 à 40 mm, de préférence de 10 à 20 mm.
  4. Tube d'enveloppe selon l'une des revendications 1 à 3, caractérisé en ce que le deuxième diamètre intérieur (9) est au moins 0,4 mm, de préférence 2 mm plus grand que le premier diamètre intérieur (8).
  5. Tube d'enveloppe selon l'une des revendications 1 à 4, caractérisé en ce que l'étendue (5) axiale (19) de la deuxième zone (3) est au moins cinq fois, de préférence au moins dix fois plus grande que la différence entre le premier (8) et le deuxième diamètre intérieur (9).
  6. Tube d'enveloppe selon l'une des revendications 1 à 5, la troisième zone (4) ayant une extension (7) axiale (19) caractérisé en ce que l'extension (7) est plus grande que la longueur (5) de la première zone (2) et/ou l'étendue (6) de la deuxième zone (3).
  7. Tube d'enveloppe selon l'une des revendications 1 à 6, caractérisé en ce que la troisième zone (4) a une extension (7) axiale (19) de 10 à 50 mm.
  8. Tube d'enveloppe selon l'une des revendications 1 à 7, caractérisé en ce que le tube d'enveloppe (1) a une épaisseur (20) de 0,1 à 1,5 mm.
  9. Convertisseur catalytique avec un tube d'enveloppe (1) selon l'une des revendications 1 à 8, notamment pour un système de gaz d'échappement d'une machine à combustion interne, dans quel cas le convertisseur catalytique a un corps en nids d'abeilles (12) en couches de tôle (18), le corps en nids d'abeilles (12) étant au moins partiellement structuré de manière telle que celui-ci peut être traversé par un gaz d'échappement dans un sens d'écoulement (13), caractérisé en ce que la première zone (2) du tube d'enveloppe (1) est agencée à proximité d'une face frontale d'entrée (16) et la troisième zone (4) à proximité d'une face frontale de sortie (17) et dans la première (2) et troisième zone (4) le corps en nids d'abeilles (12) est relié par technique de jointoiement (14) au tube d'enveloppe (1).
  10. Convertisseur catalytique selon la revendication 9, caractérisé en ce que dans la deuxième zone (3) entre le tube d'enveloppe (1) et le corps en nids d'abeilles (12) une cavité (15) avec de l'air est agencée.
EP01949350A 2000-06-02 2001-05-18 Tube de protection a moulures thermo-isolantes Expired - Lifetime EP1287237B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10027404A DE10027404A1 (de) 2000-06-02 2000-06-02 Mantelrohr mit thermisch isolierenden Sicken
DE10027404 2000-06-02
PCT/EP2001/005688 WO2001092691A1 (fr) 2000-06-02 2001-05-18 Tube de protection a moulures thermo-isolantes

Publications (2)

Publication Number Publication Date
EP1287237A1 EP1287237A1 (fr) 2003-03-05
EP1287237B1 true EP1287237B1 (fr) 2006-07-12

Family

ID=7644478

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01949350A Expired - Lifetime EP1287237B1 (fr) 2000-06-02 2001-05-18 Tube de protection a moulures thermo-isolantes

Country Status (8)

Country Link
US (1) US7670570B2 (fr)
EP (1) EP1287237B1 (fr)
JP (1) JP4618975B2 (fr)
AU (1) AU2001270530A1 (fr)
DE (2) DE10027404A1 (fr)
ES (1) ES2267790T3 (fr)
RU (1) RU2259490C2 (fr)
WO (1) WO2001092691A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10032023B4 (de) * 2000-07-01 2009-04-16 Volkswagen Ag Abgaskatalysator mit einer Wärmeisolierung
ES2272867T3 (es) * 2003-09-11 2007-05-01 Pankl Emission Control Systems Gmbh Dispositivo para la eliminacion de las particulas de hollin de una corriente del gas de escape de motores de combustion interna.

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53141166A (en) * 1977-05-16 1978-12-08 Chuo Hatsujo Kk Honey comb catalytic converter and assembly method therefor
DE2856030A1 (de) * 1978-12-23 1980-06-26 Sueddeutsche Kuehler Behr Patrone fuer abgasreinigung
DE3338899C2 (de) * 1983-03-22 1986-04-03 Friedrichsfeld Gmbh, Steinzeug- Und Kunststoffwerke, 6800 Mannheim Dichtring
DE3518756A1 (de) * 1985-05-24 1986-11-27 Audi AG, 8070 Ingolstadt Abgasleitung einer brennkraftmaschine
ATE44582T1 (de) * 1985-07-25 1989-07-15 Interatom Halterung fuer einen metallischen abgaskatalysatortraegerkoerper und verfahren zur herstellung.
DE3701555C1 (de) * 1987-01-21 1988-07-07 Mannesmann Ag Rohrverbindung fuer duennwandige,kleinkalibrige Metallrohre
JPH0721855Y2 (ja) * 1987-07-10 1995-05-17 日産自動車株式会社 触媒コンバータ装置
JPH0610132Y2 (ja) * 1988-12-19 1994-03-16 臼井国際産業株式社社 排気ガス浄化装置
US5104627A (en) * 1988-12-19 1992-04-14 Usui Kokusai Sangyo Kabushiki Kaisha Exhaust gas cleaning apparatus
DE8905415U1 (fr) * 1989-04-28 1990-08-30 Emitec Emissionstechnologie
DE4109626A1 (de) * 1991-03-23 1992-09-24 Eberspaecher J Halterung eines traegerkoerpers in abgasanlagen von fahrzeugen
JP2649461B2 (ja) * 1991-12-25 1997-09-03 トヨタ自動車株式会社 排ガス浄化触媒用担体構造
JP2620471B2 (ja) * 1992-09-29 1997-06-11 新日本製鐵株式会社 拡散接合メタル担体の製造方法
DE9317050U1 (de) * 1993-11-08 1995-03-09 Emitec Emissionstechnologie Mechanisch stabilisierte Heizkatalysatoranordnung
US5916530A (en) * 1994-08-29 1999-06-29 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Catalytic reactor
JPH08196917A (ja) * 1995-01-27 1996-08-06 Usui Internatl Ind Co Ltd メタル担体とその製造方法
DE19521583B4 (de) * 1995-06-14 2004-10-07 Kaimer Gmbh & Co. Holding Kg Muffenverbindung
DE19627289A1 (de) * 1996-06-16 1997-12-18 Andreas Dipl Ing Gifhorn Segmentale Anordnung von Katalysatormonolithen
DE10032023B4 (de) * 2000-07-01 2009-04-16 Volkswagen Ag Abgaskatalysator mit einer Wärmeisolierung

Also Published As

Publication number Publication date
WO2001092691A1 (fr) 2001-12-06
DE50110457D1 (de) 2006-08-24
EP1287237A1 (fr) 2003-03-05
ES2267790T3 (es) 2007-03-16
JP4618975B2 (ja) 2011-01-26
US7670570B2 (en) 2010-03-02
DE10027404A1 (de) 2001-12-06
US20030086836A1 (en) 2003-05-08
RU2259490C2 (ru) 2005-08-27
AU2001270530A1 (en) 2001-12-11
JP2004501309A (ja) 2004-01-15

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