EP0929739B1 - Corps en nid d'abeilles presentant une conductibilite thermique reduite dans la zone d'entree et dans la zone de sortie - Google Patents

Corps en nid d'abeilles presentant une conductibilite thermique reduite dans la zone d'entree et dans la zone de sortie Download PDF

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Publication number
EP0929739B1
EP0929739B1 EP97944887A EP97944887A EP0929739B1 EP 0929739 B1 EP0929739 B1 EP 0929739B1 EP 97944887 A EP97944887 A EP 97944887A EP 97944887 A EP97944887 A EP 97944887A EP 0929739 B1 EP0929739 B1 EP 0929739B1
Authority
EP
European Patent Office
Prior art keywords
honeycomb body
thermal conductivity
body according
section
reduced
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
EP97944887A
Other languages
German (de)
English (en)
Other versions
EP0929739A1 (fr
Inventor
Rolf BRÜCK
Robert Diewald
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 EP0929739A1 publication Critical patent/EP0929739A1/fr
Application granted granted Critical
Publication of EP0929739B1 publication Critical patent/EP0929739B1/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
    • F01N3/2853—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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/14—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by endowing the walls of conduits with zones of different degrees of conduction of heat
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/06—Ceramic, e.g. monoliths

Definitions

  • the object of the invention relates to one of a fluid flowable honeycomb body, in particular for an exhaust gas catalyst, the has an entry area and an exit area.
  • the entrance area and the outlet region are through channels through which a fluid can flow connected to each other, wherein at least a portion of reduced thermal conductivity is formed within the honeycomb body.
  • a honeycomb body is known from US-A-5 549 873.
  • a fluid through which a honeycomb body can flow is disclosed by WO 90/03220 known, which can be a wide variety of cross-sectional shapes.
  • the pollutant components in the exhaust gas flow of an exhaust system necessary that the honeycomb body is on a catalytic conversion the pollutants are at a sufficiently high temperature.
  • the electrical heating of such a honeycomb body Ejection of those occurring in the cold start phase of an internal combustion engine Exhaust gas pollutants reduced.
  • one Motor vehicle with more or less long breaks between each Driving cycles cools the internal combustion engine as well as the whole Exhaust system.
  • honeycomb body with thermal insulation which is designed in the form of a double jacket system.
  • the double jacket system includes an inner jacket tube that is spaced from an outer Jacket tube is arranged in this. The one between the inner and the the outer jacket tube creates a thermal Insulation. This will result in a reduction in the heat given off by the The outer surface of the honeycomb body is achieved.
  • a honeycomb body which has an intermediate area with considerable has reduced heat conduction.
  • This intermediate area is marked by Recesses or punched holes that are made in the sheets of the Honeycomb body are provided.
  • the area in front of the recesses serves practically as a pre-catalyst, d. H.
  • this part of the honeycomb body forms a machine that can be quickly heated up immediately after the machine is cold started Mass, while the carrier body in the area of the main catalyst forms much larger number of flow paths, so that there too a shorter active catalyst area is made available.
  • the present invention is based on the object of one Develop fluid-flowable honeycomb body so that the heat losses of the honeycomb body can be further reduced.
  • the honeycomb body according to the invention is characterized in that it a section at least in the vicinity of the entry and exit areas has reduced thermal conductivity.
  • a section at least in the vicinity of the entry and exit areas has reduced thermal conductivity.
  • the honeycomb body in the vicinity of the entry and exit area each has a section of reduced thermal conductivity
  • the heat losses of the middle section are reduced, whereby the section of the honeycomb body lying between the entry and exit area over a longer period of time at a higher temperature than this is the case with the known honeycomb bodies.
  • This will create a improved cleaning effect of an exhaust gas achieved after a restart, because the honeycomb body is between the entrance and the exit area is at a higher temperature level.
  • the section between the The entry and exit areas therefore heat up much faster, whereby also the temperature necessary for the catalytic conversion is achieved more quickly.
  • honeycomb body is preferred, in which the section the reduced thermal conductivity over the entire cross-section extends of the honeycomb body.
  • a reduction in the thermal conductivity of the Honeycomb body can be achieved in that the wall at least one of its channels is at least partially formed with a reduced wall thickness is. As a result, the cross section in the heat transport direction is reduced.
  • the section of reduced thermal conductivity thereby is formed that the wall of at least one of the channels at least has a recess.
  • the cross section of the Honeycomb body reduced.
  • the strength of the honeycomb body can be affected. Such a deterioration in strength of the honeycomb body does not occur if the section, without recesses, but consists of a heat-insulating material.
  • the formation of recesses in a honeycomb body can be done before or after the manufacturing process of the honeycomb body. Becomes the honeycomb body at least through wound and / or layered layers partially structured sheets is formed, so is the formation of the recesses before winding or layering the layers of the sheets.
  • Has thermal conductivity is special as a honeycomb body for one Exhaust gas catalyst suitable, and preferably arranged in a jacket tube, wherein the jacket tube in the vicinity of the entry and exit area has a portion of reduced thermal conductivity. It is proposed that that the section is formed by recesses in the casing tube is. With the recesses in the tubular casing or in the honeycomb body, can perforations.
  • the section of reduced thermal conductivity is preferably arranged in alignment.
  • FIG. 1 shows a honeycomb body 1 through which a fluid can flow
  • Honeycomb body 1 has an entry area 2 and an exit area 3 Entry area 2 and exit area 3 can be flowed through by a fluid Channels 4 connected together.
  • the honeycomb body 1 is in one Jacket tube 5 arranged.
  • a section 6 is formed with reduced thermal conductivity.
  • Section 6 is formed by recesses 7.
  • the recesses 7 are formed in the wall 8 of the channels 4 and at least extend partially transverse to the flow direction of the fluid F.
  • the exit region 3 has recesses 9 which form a section 10 form a reduced thermal conductivity.
  • the recesses 9 are in the wall 8 of the channels 4 introduced.
  • the jacket 5 also has one Section 11 and section 12 reduced thermal conductivity in the Entry or exit area 2, 3 of the honeycomb body 1.
  • the sections 11, 12 are formed by recesses 13 and 14, respectively.
  • the recesses 7, 9, 13 and 14 of sections 6, 10, 11 and 12, respectively, are elongated. they are both in the jacket tube 5 and in the honeycomb body 1 of the same design.
  • the recesses 13, 14 can have a circular cross section have, as shown in Figure 2.
  • the recesses 13, 14 are preferably 5 to 15 mm behind the respective end face 2, 3 of the honeycomb body trained in one level.
  • Figure 2 shows the arrangement of a honeycomb body 1 in an exhaust system of an internal combustion engine.
  • the honeycomb body 1 has a tubular casing 5, which is nearby of the entry area 2 recesses 13 and in the vicinity of the exit area Has 3 recesses 14.
  • the jacket 5 of the honeycomb body 1 is surrounded by an insulating material 15. This insulating material 15 is from surrounded an outer jacket tube 16.
  • a Diffuser 17 formed, which is connected to the outer casing tube 16.
  • a confuser 18 is formed, which is connected to the outer Jacket tube 16 is connected.
  • the heat emission from the center of the honeycomb body 1 becomes the confuser 18 or diffuser 17 or reduced in the gas spaces existing in front. This results in an essentially hot "cell” that is the thermal insulation 15 and the sections 6, 10, 11 and 12 reduced Thermal conductivity is limited. This will make one more energetic achieved a more favorable design of an exhaust gas cleaning system.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)

Abstract

L'invention concerne une structure (1) pouvant être traversée par un fluide, en particulier un corps en nid d'abeilles de catalyseur pour gaz d'échappement, qui présente une zone d'entrée (2) et une zone de sortie (3), pourvues de canaux (4) pouvant être traversés par un fluide. A proximité de la zone d'entrée (2) et à proximité de la zone de sortie (3), se trouve une section (6, 10) dont la conductibilité thermique est réduite, chacune de ces sections comportant des évidements (7, 9) formés dans la paroi (8) d'au moins quelques canaux (4).

Claims (9)

  1. Corps en nid d'abeilles (1) pouvant être traversé par un fluide, notamment pour un catalyseur de gaz d'échappement, avec une zone d'entrée (2) qui est reliée à une zone de sortie (3) à l'intermédiaire de canaux (4) lesquels canaux (4) peuvent être traversés par un fluide, à l'intérieur du corps en nid d'abeilles au moins une section étant réalisée qui présente une conductibilité thermique réduite, caractérisé en ce que respectivement une section (6, 10) de conductibilité thermique réduite est réalisée à l'intérieur du corps en nid d'abeilles (1) près de la zone d'entrée et de la zone de sortie (2, 3).
  2. Corps en nid d'abeilles selon la revendication 1, caractérisé en ce que la section (6, 10) de conductibilité thermique réduite s'étend sur la totalité de la section transversale du corps en nid d'abeilles (1).
  3. Corps en nid d'abeilles selon la revendication 1 ou 2, caractérisé en ce que dans la section (6, 10) la paroi (8) d'au moins quelques canaux (4) est réalisée au moins partiellement avec une épaisseur de paroi réduite.
  4. Corps en nid d'abeilles selon la revendication 1, 2 ou 3, caractérisé en ce que dans la section (6, 10) la paroi (8) d'au moins quelques canaux (4) présente au moins un dégagement (7, 9).
  5. Corps en nid d'abeilles selon l'une des revendications 1 à 4, caractérisé en ce que la section (6, 7) est constituée par un matériau à isolation thermique.
  6. Corps en nid d'abeilles selon l'une des revendications 1 à 5, caractérisé en ce que le corps en nid d'abeilles est formé par des couches enroulées et/ou empilées de tôles au moins partiellement structurées
  7. Corps en nid d'abeilles selon l'une des revendications 1 à 6, caractérisé en ce que celui-ci est agencé dans un tube d'enveloppe (5), le tube d'enveloppe (5) présentant une section (11, 12) de conductibilité thermique réduite près de la zone d'entrée et de la zone de sortie (2, 3).
  8. Corps en nid d'abeilles selon la revendication 7, caractérisé en ce que la section (11, 12) dans le tube d'enveloppe (5) et la section (6, 10) dans le corps en nid d'abeilles sont alignées.
  9. Corps en nid d'abeilles selon la revendication 7 ou 8, caractérisé en ce que la section (11, 12) est réalisée par des dégagements (13, 14) dans le tube d'enveloppe (5).
EP97944887A 1996-09-26 1997-09-17 Corps en nid d'abeilles presentant une conductibilite thermique reduite dans la zone d'entree et dans la zone de sortie Expired - Lifetime EP0929739B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19639633A DE19639633A1 (de) 1996-09-26 1996-09-26 Wabenkörper mit verringerter Wärmeleitfähigkeit im Eintritts- und Austrittsbereich
DE19639633 1996-09-26
PCT/EP1997/005096 WO1998013590A1 (fr) 1996-09-26 1997-09-17 Corps en nid d'abeilles presentant une conductibilite thermique reduite dans la zone d'entree et dans la zone de sortie

Publications (2)

Publication Number Publication Date
EP0929739A1 EP0929739A1 (fr) 1999-07-21
EP0929739B1 true EP0929739B1 (fr) 2001-12-05

Family

ID=7807006

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97944887A Expired - Lifetime EP0929739B1 (fr) 1996-09-26 1997-09-17 Corps en nid d'abeilles presentant une conductibilite thermique reduite dans la zone d'entree et dans la zone de sortie

Country Status (6)

Country Link
EP (1) EP0929739B1 (fr)
JP (1) JP4098363B2 (fr)
KR (1) KR100307076B1 (fr)
AU (1) AU4623697A (fr)
DE (2) DE19639633A1 (fr)
WO (1) WO1998013590A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011194382A (ja) * 2010-03-24 2011-10-06 Ngk Insulators Ltd ハニカム構造体
DE102011081493B4 (de) * 2011-08-24 2023-05-11 Bayerische Motoren Werke Aktiengesellschaft Katalysatorträger für einen Katalysator, Katalysator und Verfahren zur Herstellung eines Katalysators

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2549255A1 (de) * 1975-11-04 1977-05-05 Volkswagenwerk Ag Katalytische reinigungsanlage fuer die abgase von brennkraftmaschinen
DE8816514U1 (fr) 1988-04-25 1989-10-26 Emitec Emissionstechnologie
DE3822944A1 (de) * 1988-07-07 1990-01-11 Leistritz Ag Abgaskatalysator
KR960012698B1 (ko) 1988-09-22 1996-09-24 에미텍 게젤샤프트 퓌어 에미시온스테크놀로기 엠베하 다수의 금속판재로 이루어진 벌집형 구조물 및 그 제조방법
DE8812762U1 (fr) 1988-10-11 1989-06-29 Emitec Emissionstechnologie
JPH0634927B2 (ja) * 1989-11-16 1994-05-11 トヨタ自動車株式会社 排気ガス浄化触媒用メタル担体
JPH08103664A (ja) * 1994-10-04 1996-04-23 Nippondenso Co Ltd ハニカム体およびこのハニカム体よりなる触媒担体を有する触媒コンバータ
US5549873A (en) * 1994-02-18 1996-08-27 Volkswagen Ag Exhaust gas converter arrangement
JPH10506053A (ja) * 1994-09-26 1998-06-16 エミテク・ゲゼルシャフト・フュール・エミシオーンテクノロギー・ミット・ベシュレンクテル・ハフツング ディスク状に構築されたハニカム状の本体、特に触媒キャリア本体
DE4437718A1 (de) * 1994-10-21 1996-04-25 Emitec Emissionstechnologie Katalysator-Trägerkörper mit einer Innenisolierung

Also Published As

Publication number Publication date
KR20000048657A (ko) 2000-07-25
AU4623697A (en) 1998-04-17
DE59705700D1 (de) 2002-01-17
KR100307076B1 (ko) 2001-09-24
EP0929739A1 (fr) 1999-07-21
JP4098363B2 (ja) 2008-06-11
JP2001500785A (ja) 2001-01-23
DE19639633A1 (de) 1998-04-02
WO1998013590A1 (fr) 1998-04-02

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