EP2568138B1 - Matrice brute flexible et plate pour un catalyseur, ainsi qu'un catalyseur correspondant - Google Patents

Matrice brute flexible et plate pour un catalyseur, ainsi qu'un catalyseur correspondant Download PDF

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Publication number
EP2568138B1
EP2568138B1 EP12179036.4A EP12179036A EP2568138B1 EP 2568138 B1 EP2568138 B1 EP 2568138B1 EP 12179036 A EP12179036 A EP 12179036A EP 2568138 B1 EP2568138 B1 EP 2568138B1
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EP
European Patent Office
Prior art keywords
catalyst
starting template
catalyst support
flexible flat
sheathing
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.)
Active
Application number
EP12179036.4A
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German (de)
English (en)
Other versions
EP2568138A2 (fr
EP2568138A3 (fr
Inventor
Peter Kupske
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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.)
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Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP2568138A2 publication Critical patent/EP2568138A2/fr
Publication of EP2568138A3 publication Critical patent/EP2568138A3/fr
Application granted granted Critical
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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
    • F01N3/2803—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
    • F01N13/009—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 two or more separate purifying devices arranged in series
    • F01N13/0097—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 two or more separate purifying devices arranged in series the purifying devices are arranged in a single 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
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/08—Exhaust treating devices having provisions not otherwise provided for for preventing heat loss or temperature drop, using other means than layers of heat-insulating material
    • 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
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • F01N2330/04—Methods of manufacturing
    • 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
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/32—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils
    • 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

Definitions

  • the present invention relates to a flexible sheet-like raw die coilable to a catalyst carrier, a catalyst for purifying exhaust gases of an internal combustion engine using the catalyst carrier, and a method for producing such a catalyst.
  • Catalysts for purifying exhaust gases of internal combustion engines are known from the prior art.
  • the DE 4014215 A1 teaches a catalyst having a honeycomb body having a plurality of axial gas passages and a cylindrical cavity extending through the honeycomb body.
  • the honeycomb core body is mounted in a metal housing.
  • An inner wall of the honeycomb core body is preferably supported by cross-shaped reinforcing ribs.
  • an exhaust tailpipe catalyst which is arranged in addition to a main catalyst in an exhaust tailpipe and coated with typical catalyzing materials such as platinum, palladium, rhodium or the like.
  • the US 3,785,781 discloses a catalyst having a cylindrical housing in which a plurality of mutually different catalyst carriers are arranged in succession between tapering end faces in the flow direction of exhaust gas flowing through the catalyst.
  • the catalyst carriers arranged directly next to one another differ, for example, from the number and size of the flow paths formed in them and / or from their catalytically active coatings.
  • a catalyst which has three regions of porous material with spaces between the regions to reduce the turbulence generated in the regions.
  • the invention has for its object to provide a catalyst with easy to produce high catalytic activity.
  • a catalyst is constructed in such a way that it comprises a catalyst support spirally wound from a flexible planar raw matrix, which raw matrix has at least two recesses located next to one another in a transverse direction of the raw matrix.
  • the longitudinal direction a of a catalyst 1 is the direction of an axis about which a flexible sheet raw die 50, 150 is wound to a catalyst carrier 20 and which extends from an inflow port 10 to an outflow port 30 of the catalyst 1.
  • the transverse direction b is a direction perpendicular to the longitudinal direction. Accordingly, a flow direction a of the exhaust gas is substantially parallel to the longitudinal direction of the catalyst 1. The turns of the wound raw matrix lie in the transverse direction b of the catalyst on top of each other.
  • a longitudinal direction of the sheet-like raw dies 50, 150 corresponds to the longitudinal direction of the catalyst 1 in the wound state
  • a transverse direction of the flat raw die 50, 150 corresponds to the transverse direction of the catalyst 1 in the wound state.
  • Fig. 1 1 shows a catalyst 1 according to the invention.
  • the catalyst 1 has a catalyst carrier 20, an inflow opening 10, an outflow opening 30 and an enveloping tube 40.
  • the catalyst support 20 is formed from a spirally wound flat raw mold 50.
  • the catalyst carrier 20 has a first portion 21 and a second portion 22.
  • the two sections 21, 22 are arranged coaxially with one another such that the first section 21 is arranged in the flow direction a in front of the second section 22 and forms an entry region.
  • the first portion 21 and the second portion 22 are interconnected by webs 54 bridging a gap between the first portion 21 and the second portion 22.
  • the catalyst support 20 By separating the catalyst support 20 into at least two sections 21, 22, the catalyst support 20 has a relatively low thermal mass in the inlet region. Also, the heat conduction from the catalyst carrier 20 in the inlet region is also behind the second section 22 arranged by the distance between the two sections, which may be, for example, 2 to 40 mm, reduced. Also, the axial length of the first portion 21, and thus of the inlet portion, may be less than that of the portion or portions 22 disposed therebehind.
  • the first section 21 is heated more quickly and thus becomes faster active with increased efficiency.
  • the first section 21 already reaches the so-called "lightoff" temperature shortly after the engine start, ie. H. the catalyst is effective after a short time.
  • the exhaust gas heated by catalytic reaction in the first section 21 of the catalytic converter 1 rapidly heats the at least one second section 22 arranged behind it so that the catalytic converter 1 achieves its full efficiency in a short time.
  • the inflow opening 10 is the opening of the catalyst 1, into which the exhaust gas generated by an internal combustion engine enters the catalyst 1.
  • the outflow opening 30 is the opening of the catalyst 1 facing away from the inflow opening 10, through which the exhaust gas purified in the catalyst 1 exits.
  • the end face of the inflow opening 10 is concave in the flow direction a of the exhaust gas.
  • the cladding tube 40 has a cross section substantially corresponding to the cross section of the wound catalyst support 20 and is mounted around the wound catalyst support 20 such that the inside of the cladding tube 40 is bonded to the peripheral side of the catalyst support 20, for example via a weld, glue or solder joint or otherwise, as appropriate, at least partially connected, so that the catalyst support 20 is held axially in the cladding tube.
  • the axial fixing of the catalyst carrier 20 in the cladding tube 40 can also be done by clamping the catalyst carrier between tapered end portions of the cladding tube.
  • Fig. 2 shows a non-inventive catalyst support 20 in a developed state.
  • the catalyst carrier 20 forms a flexible planar raw mold 50 having a substantially plate-like or planar structure, the first portion 21, which defines the inlet region, and in the flow direction of the first portion 21 subsequent second portion 22, the Defines the inlet region subsequent area, has.
  • the two sections 21, 22 are interconnected only by webs 54, between which recesses 53 or holes of the raw die are formed, for example by punching.
  • the planar raw mold 50 is formed of, for example, a first flat metal sheet and a second corrugated metal sheet disposed on the first flat metal sheet, and a catalytic material such as platinum, palladium, rhodium or the like is applied to the corrugated metal sheet.
  • a catalytic material such as platinum, palladium, rhodium or the like is applied to the corrugated metal sheet.
  • the sheet-like raw die may be formed only of a metal sheet such as a steel sheet to which one of the above-mentioned catalytic materials is applied.
  • the two sections 21, 22 may be coated with different materials or otherwise differently, so that the two sections 21, 22 can be adapted to respective requirements.
  • the overall width of the webs 54 in the transverse direction of the raw mold 50 is advantageously smaller than the total width of the recesses 53 in the transverse direction of the raw mold 50, whereby the temperature distribution in the catalyst 1 is advantageously influenced:
  • the heat conduction from the first section 21 to the second section 22 is deteriorated.
  • the first section 21 already reaches the operating temperature required for a catalytic effect shortly after the start of the internal combustion engine and the power of the catalytic converter 1 is increased in this way.
  • a pressure gradient existing in the catalyst 1 in the radial direction can be reduced.
  • the exhaust gas flowing through a recess 53 with a radial component impinges on a web or wall region of the catalyst carrier which lies opposite the recess and is diverted there in the direction of flow a.
  • a pressure balance is achieved and in addition improves the catalytic efficiency.
  • Each section 21, 22 has a substantially rectangular shape and two longitudinal edges 51 extending in the longitudinal direction of the planar blank die 50 and two transverse edges 52 extending in the transverse direction of the flat blank die 50.
  • the transverse edge 52 of the first section 21, first flown in the wound state by the exhaust gas, is inclined to the longitudinal direction or the transverse direction of the flat raw die 50 not equal to 90 ° in such a way that, in the wound-up state, the raw die, if according to FIG Fig. 2 right longitudinal edge is radially inward, a concave inlet opening 10 according to Fig. 1 arises. If the according to Fig. 2 left longitudinal edge is arranged radially inward, creates a convex inlet opening.
  • Fig. 3 shows an inventive embodiment of a catalyst support 20 in a developed state.
  • the catalyst carrier 20 forms a flexible planar raw mold 150 with a substantially plate-shaped or areal structure.
  • the planar raw mold 150 has a first portion 121, a second portion 122, and a third portion 123.
  • the sections 121, 122, 123 are arranged one after the other in the flow direction a (as in the first embodiment).
  • the recesses 153a in the transverse direction are arranged next to one another such that they only partially overlap in the transverse direction and are mutually offset longitudinally.
  • the recesses 153b between the second portion 122 and the third portion 123 are completely overlapping in the transverse direction, but unequally spaced.
  • Another difference between the raw mold 150 according to Fig. 3 and the raw die 50 according to FIG Fig. 2 is that the according to Fig. 3 inflow-side, right transverse edge 152 of the raw die 150 is not rectilinear as the Fig. 2 but wavy with a bulge 155 two concavities 156 between three bulges 155 is formed.
  • the transverse edge 152 is undulating and starts at an edge with a vertex 155, goes over a valley or a concavity 156 in a central vertex or a middle bulge 155 over from which he over another valley or a further concavity 156 merges into a bulge 155 or a vertex at the other edge.
  • the raw mold 150 is in accordance with Fig. 3 is wound around two mandrels, each extending from the lowest point of a concavity 156 parallel to the longitudinal direction of the raw die, creates a bobbin whose center are the concavities 156 and at the outer edge of the vertices of the bulges. This creates a concave inlet opening similar to the one in FIG Fig. 1 shown.
  • the position of the recesses 53 and 153 may be such that when winding radially through the resulting catalyst carrier through leading channels are formed by the direct cross-balancing radial pressure differences occurs.
  • the recesses may also be formed such that a recess with a recess of an adjacent turn of the winding body overlaps more or less so that the radial transverse flow resulting from a radial pressure gradient impinges on a web 54 or 154.
  • the described embodiments of the raw die can be changed in many ways.
  • the outflow opening can be similar to the inflow opening by appropriate design of the according Fig. 1 upper transverse edge 52 and according to Fig. 3 left transverse edge 52 concave and / or convex.
  • the recesses 53 and 153 can have very different shapes and be arranged in different ways with different distances and overlaps. They do not necessarily have to be arranged in such a way that different regions of the raw die are arranged one behind the other in the flow direction of the exhaust gas and the thermal conductivity of the raw die or of the catalyst support between these regions is deliberately worsened, so that the regions can be kept at different temperatures.
  • the recesses may be arranged distributed irregularly over the surface of the raw die, so that only a compensation of radial pressure gradient takes place, wherein the effectiveness of the catalyst is increased by the fact that each flowing through a recess exhaust gas strikes a catalytically coated wall portion opposite the recess. Furthermore, it is also achieved with the irregularly distributed recesses that they accommodate axial expansions of the catalyst without the axial length of the catalyst support changing overall.
  • the catalyst support is readily fabricated by providing a flexible sheet-like raw die which is recessed, for example, by die-cutting and then spirally wound around one or more dome to the catalyst support. During winding, superimposed turns of the raw die can be connected to one another, for example by spot welding, which increases the overall stability of the catalyst support.
  • the resulting bobbin is introduced into the cladding tube and soldered, for example, with the inside.
  • the catalytic coating which may be different for different axially spaced sections of the catalyst, for example, by dipping the bobbin before or after the introduction into the cladding tube. In this way, the catalytic layer (washcoat) can be applied to the wound body as a carrier substrate in the dipping process.
  • a different coating can be varied, for example, by means of a diving depth and / or a diving direction.

Claims (8)

  1. Matrice brute, plate, flexible (50, 150) pouvant être enroulée pour former un support de catalyseur (20), cette matrice brute (50, 150) comprenant au moins deux évidements (53, 153) qui sont situés au voisinage l'un de l'autre dans la direction transversale de la matrice brute (50, 150) et se chevauchent dans la direction transversale,
    caractérisée en ce qu'
    au moins un bord transversal (52, 152) de la matrice brute (50, 150) s'étend, dans au moins une zone selon un angle différent de 90° par rapport à la direction longitudinale de la matrice brute (50, 150), ce bord transversal (52, 152) ayant un profil courbe et le bord transversal (152) étant ondulé et comportant respectivement une convexité (155) à ses extrémités et dans sa zone centrale et étant formé avec des concavités (156) entre les convexités (155).
  2. Matrice brute, plate, flexible (50, 150) conforme à la revendication 1, dans laquelle les évidements (53, 153) sont situés au voisinage l'un de l'autre de sorte qu'une zone d'entrée de la matrice brute (50, 150) comportant un bord transversal (52, 152) soit relié à une zone s'y connectant par des traverses (54, 154) formées entre les évidements (53, 153), la largeur totale des traverses (54, 154) mesurée dans la direction transversale de la matrice brute (50, 150) étant inférieure à la largeur totale des évidements (53, 153) mesurée dans la direction transversale de la matrice brute (50, 150).
  3. Matrice brute, plate, flexible (50, 150) conforme à la revendication 2, dans laquelle la zone d'entrée et la zone se connectant à celle-ci sont recouvertes d'un revêtement catalytiquement actif de manière différente.
  4. Catalyseur (1) destiné à permettre l'épuration des gaz d'échappement d'un moteur à combustion interne comprenant un support de catalyseur (20),
    ce support de catalyseur (20) étant constitué par une matrice brute, plate, flexible (50, 150) enroulée en spirale conforme à l'une des revendications 1 à 3.
  5. Catalyseur (1) conforme à la revendication 4,
    dans lequel le support de catalyseur (20) est logé dans un tube-enveloppe (40), et la face périphérique du support de catalyseur (20) est reliée au moins partiellement à la face interne du tube-enveloppe (40).
  6. Catalyseur (1) conforme à la revendication 4,
    dans lequel le support de catalyseur (20) est logé dans un tube-enveloppe (40) et est maintenu axialement entre des zones d'extrémités qui s'amincissent de ce tube-enveloppe (40).
  7. Catalyseur (1) conforme à l'une des revendications 4 à 6,
    dans lequel au moins la partie frontale du support de catalyseur (1) située côté circulation est concave et/ou convexe.
  8. Procédé d'obtention d'un catalyseur (1) conforme à l'une des revendications 4 à 7,
    comprenant des étapes consistant à :
    - se procurer une matrice plate, flexible (50, 150) conforme à l'une des revendications 1 à 3,
    - enrouler en spirale la matrice brute, plate, flexible (50, 150) de façon à obtenir un support de catalyseur (20), et
    - positionner le support de catalyseur (20) dans un tube-enveloppe (40).
EP12179036.4A 2011-08-24 2012-08-02 Matrice brute flexible et plate pour un catalyseur, ainsi qu'un catalyseur correspondant Active EP2568138B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011081493.0A DE102011081493B4 (de) 2011-08-24 2011-08-24 Katalysatorträger für einen Katalysator, Katalysator und Verfahren zur Herstellung eines Katalysators

Publications (3)

Publication Number Publication Date
EP2568138A2 EP2568138A2 (fr) 2013-03-13
EP2568138A3 EP2568138A3 (fr) 2015-06-10
EP2568138B1 true EP2568138B1 (fr) 2016-09-28

Family

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Application Number Title Priority Date Filing Date
EP12179036.4A Active EP2568138B1 (fr) 2011-08-24 2012-08-02 Matrice brute flexible et plate pour un catalyseur, ainsi qu'un catalyseur correspondant

Country Status (2)

Country Link
EP (1) EP2568138B1 (fr)
DE (1) DE102011081493B4 (fr)

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1919626A (en) 1930-10-15 1933-07-25 Jr John Finn Apparatus for purifying exhaust gas
US3785781A (en) 1971-10-04 1974-01-15 Universal Oil Prod Co Apparatus for catalytically converting fluid
DE2905241A1 (de) * 1979-02-12 1980-08-14 Bremshey Ag Traegermatrix fuer einen katalytischen reaktor zur abgasreinigung bei brennkraftmaschinen
JPS63134061A (ja) 1986-11-26 1988-06-06 Calsonic Corp メタルハニカム担体およびその製造方法
US4886711A (en) 1987-11-27 1989-12-12 General Motors Corporation Catalytic converter metal monolithic catalyst substrate
JPH0733875Y2 (ja) 1989-05-08 1995-08-02 臼井国際産業株式会社 排気ガス浄化装置
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
JP2596200Y2 (ja) 1992-02-28 1999-06-07 三恵技研工業株式会社 排気浄化装置
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
JP3755008B2 (ja) 1995-05-22 2006-03-15 株式会社日本自動車部品総合研究所 排ガス浄化用金属製触媒担体の製造方法
US5849251A (en) 1995-07-17 1998-12-15 Timko; Mark Catalytic converter for a tailpipe including apparatus for relieving back pressure
EP0818613A1 (fr) * 1996-07-08 1998-01-14 Corning Incorporated Système de purification de gaz d'échappement
DE19639633A1 (de) 1996-09-26 1998-04-02 Emitec Emissionstechnologie Wabenkörper mit verringerter Wärmeleitfähigkeit im Eintritts- und Austrittsbereich
JP2000051711A (ja) * 1998-08-07 2000-02-22 Nippon Steel Corp 排気ガス浄化用触媒担体及びその製造方法
JP2007038140A (ja) * 2005-08-03 2007-02-15 Showa Aircraft Ind Co Ltd 排気ガス浄化用の触媒担体

Also Published As

Publication number Publication date
EP2568138A2 (fr) 2013-03-13
DE102011081493A1 (de) 2013-02-28
EP2568138A3 (fr) 2015-06-10
DE102011081493B4 (de) 2023-05-11

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