[go: up one dir, main page]

WO1996034188A1 - A catalyst carrier arrangement - Google Patents

A catalyst carrier arrangement Download PDF

Info

Publication number
WO1996034188A1
WO1996034188A1 PCT/SE1996/000499 SE9600499W WO9634188A1 WO 1996034188 A1 WO1996034188 A1 WO 1996034188A1 SE 9600499 W SE9600499 W SE 9600499W WO 9634188 A1 WO9634188 A1 WO 9634188A1
Authority
WO
WIPO (PCT)
Prior art keywords
monolith
casing
gap
arrangement
section
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.)
Ceased
Application number
PCT/SE1996/000499
Other languages
French (fr)
Inventor
Sven Melker Nilsson
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.)
Individual
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20398107&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1996034188(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to JP8532022A priority Critical patent/JPH11504094A/en
Priority to AU54120/96A priority patent/AU5412096A/en
Priority to DE69629196T priority patent/DE69629196T2/en
Priority to EP96911153A priority patent/EP0840840B1/en
Publication of WO1996034188A1 publication Critical patent/WO1996034188A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F01N3/2842—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
    • 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

Definitions

  • the subject invention concerns a carrier arrangement for catalytic converters.
  • metal substrates As substrates to be used to support the catalytic material in internal combustion engine exhaust systems ceramic materials are predominantly used. In latter years, metal substrates have, however, come into use to an increasingly large extent. The advantage of metal substrates is their ability to reach working temperatures more rapidly than do cermamic ones, as accordingly they begin their exhaust gases purification function at an earlier stage after start, which is a most essential feature. Moreover, metal substrates are more efficient thermal conductors, and thus they may be heated more quickly and the risk of local overheating is reduced. In addition, metal substrates support higher temperatures than ceramic ones.
  • metal monoliths As carrier members supporting the catalytic material so called metal monoliths are used. These consist of metal foils, preferably of stainless steel, wound into rolls wherein metal foils of flat configuration alternate with metal foils of corrugated configuration, whereby throughflow channels extending through the catalyst body are formed.
  • the foil thickness is small, normally only about 0.05 mm.
  • the catalyst body also includes a metal cover forming a jacket surrounding the monolith in contact with the latter. The cover thickness may amount to approximately 1 - 1.6 mm.
  • the thin carrier member foils are heated very rapidly.
  • the temperature quickly reaches between 500 and 800°C.
  • the temperature may rise to the range of up to between 1100 and 1200°C.
  • the temperature of the catalyst body rapidly sinks to the level of the ambient temperature.
  • the repeated temperature changes constitue a problem that affects the catalyst long-term durability.
  • the rapidly heated thin foils of the monolith also expand quickly.
  • the surrounding casing in abutment against the monolith but not in close contact with the exhausts and in addition having a larger material thickness, is heated and expands at a slower pace. During the heating, the casing thus prevents the monolith from expanding, which gives rise to considerable radial compressive forces that cause deformations to form in the monolith.
  • the strength of the metal also is reduced considerably, often down to about 10% of its strength at room temperature, which aggravates the deformations and reduces the monolith life further.
  • Fig. 1 is a broken schematical longitudinal sectional view through a catalyst body
  • Fig. 2 is a similar schematical longitudinal sectional view through a catalyst body showing a modified arrangement of attachment in accordance with the invention
  • Fig. 3 is a larger-scale view of a part of the attachment arrangement in accordance with the invention.
  • Fig. 1 illustrates a basic design of the inventive object.
  • a catalyst body 1 comprises a metal casing 2 enclosing a so called monolith 3.
  • the latter in turn consists of carrier members, designed to support a catalytic material and consisting of helically wound metal foils, arranged so that flat metal foils 4 alternate with corrugated metal foils, so as to form through-flow channels 5 extending through the catalyst body 1.
  • the monolith 3 has a width or diameter that is slightly smaller than the internal width of the casing 2. Accordingly, a gap 6 forms between the casing 2 and the monolith 3, the size of which varies within different temperature ranges.
  • the casing 2 is provided with at least one band-like depression 7, in accordance with the embodiment illustrated in the drawing figure with two such depressions, the gap 6 around the monolith 3 thus being eliminated in the area opposite said depressions.
  • the casing 2 and the monolith 3 are interconnected, preferably only at spaced intervals 8, for instance by means of soldering or welding.
  • the expansion may now take place essentially unimpededly, with the exception of in the area of the depressions 7 where a certain deformation of the outermost foil 4 of the monolith 3 will take place. Consequently, no compressive forces will generate along the major part of the surface of the monolith 3.
  • the monolith 3 may again retract and thus again open up a gap 6.
  • the catalyst body 1 may operate in an intact condition over a longer period than has hitherto been possible, with consequential increase of its serviceable life. Further improvements may be achieved by omitting to join one or some of the outermost foils 4 along the entire foil length to the the foils immediately interiorly thereof but instead joining them to one another at points spaced laterally from the points 8 of attachment. When the monolith 3 cools down, with consequential contraction, the tensile forces at the points 8 of attachment will not be very pronounced because of the resiliency imparted to the outermost foils 4 between their interconnection points. Figs.
  • FIG. 2 and 3 illustrate a modification of the mode of attachment in accordance with the invention.
  • an exhaust pipe 9 serves as the casing.
  • the monolith 3 is provided at each end with a circumferential collar 10 which projects past its associated monolith end and which is attached to the exhaust pipe 9.
  • the collars 10 preferably are attached to the monolith 3 at discrete intervals 12.
  • the collars 10 bridge a gap 11 formed between the exhaust pipe 9 and the monolith 3, the latter thus, upon heating and cooling, being given a compara- tively free space in which to expand and contract while at the same time it is securely anchored inside the exhaust pipe 9.
  • the gap 6 could be eliminated by introduction of one or several inserts between the casing 2 and the monolith 3 instead of by forming depressions 7 in the casing.

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)
  • Catalysts (AREA)

Abstract

The invention concerns a carrier arrangement for catalytic converters comprising a catalyst body (1) consisting of a monolith (3) formed of carrier members desined to support a catalytic material, and of a metal casing (2, 9) enclosing the monolith (3). The interior width of the casing (2, 9) exceeds that of the monlith (3) whereby a gap (6, 11) forms between the casing (2, 9) and the monolith (3). This gap (6, 11) is bridged at least in the area of a section (7, 10) extending circumferentially around the monolith (3), the monolith (3) being attached to the casing (2, 9) along said section (7, 10).

Description

A CATALYST CARRIER ARRANGEMENT
The subject invention concerns a carrier arrangement for catalytic converters.
As substrates to be used to support the catalytic material in internal combustion engine exhaust systems ceramic materials are predominantly used. In latter years, metal substrates have, however, come into use to an increasingly large extent. The advantage of metal substrates is their ability to reach working temperatures more rapidly than do cermamic ones, as accordingly they begin their exhaust gases purification function at an earlier stage after start, which is a most essential feature. Moreover, metal substrates are more efficient thermal conductors, and thus they may be heated more quickly and the risk of local overheating is reduced. In addition, metal substrates support higher temperatures than ceramic ones.
As carrier members supporting the catalytic material so called metal monoliths are used. These consist of metal foils, preferably of stainless steel, wound into rolls wherein metal foils of flat configuration alternate with metal foils of corrugated configuration, whereby throughflow channels extending through the catalyst body are formed. The foil thickness is small, normally only about 0.05 mm. The catalyst body also includes a metal cover forming a jacket surrounding the monolith in contact with the latter. The cover thickness may amount to approximately 1 - 1.6 mm.
When the hot exhaust gases flow through the monolith during the combustion engine operation the thin carrier member foils are heated very rapidly. Usually, the temperature quickly reaches between 500 and 800°C. In some types of engines, the temperature may rise to the range of up to between 1100 and 1200°C. As soon as the engine stops, the temperature of the catalyst body rapidly sinks to the level of the ambient temperature.
The repeated temperature changes constitue a problem that affects the catalyst long-term durability. The rapidly heated thin foils of the monolith also expand quickly. The surrounding casing, in abutment against the monolith but not in close contact with the exhausts and in addition having a larger material thickness, is heated and expands at a slower pace. During the heating, the casing thus prevents the monolith from expanding, which gives rise to considerable radial compressive forces that cause deformations to form in the monolith. When the abovementioned high temperature levels are reached, the strength of the metal also is reduced considerably, often down to about 10% of its strength at room temperature, which aggravates the deformations and reduces the monolith life further.
When the engine is stopped and the exhausts cool down the opposite phenomenon occurs, i.e. the monolith foils cool at a higher speed than the surrounding thicker casing. As a result, considerable tensile forces generate between the outermost part of the monolith and the cover.
For the reasons outlined in the aforegoing, considerable problems are involved as regards the attachment of metal monoliths in their casings. Several various solutions have been proposed and tested, but often with poor results. Some viable constructions have been developed, e.g. by the German company Emitec GmbH, but they are comparatively complex and expensive. A feature common to all these prior-art solutions is that they apply to monoliths wherein the various metal foil layers are interconnected by means of soldering, with the outermost layer being soldered to the surrounding jacket. The subject invention provides a simple, reliable and economical solution to the securement problem. The solution functions both when applied to metal monoliths soldered together in the manner indicated above and when applied to metal monoliths joined together in some other manner, without soldering. The characteristic features of the attachment arrangement appear from the appended claims. The invention will be described in closer detail in the following with reference to the accompanying drawings, wherein
Fig. 1 is a broken schematical longitudinal sectional view through a catalyst body, Fig. 2 is a similar schematical longitudinal sectional view through a catalyst body showing a modified arrangement of attachment in accordance with the invention, and
Fig. 3 is a larger-scale view of a part of the attachment arrangement in accordance with the invention. Fig. 1 illustrates a basic design of the inventive object. A catalyst body 1 comprises a metal casing 2 enclosing a so called monolith 3. The latter in turn consists of carrier members, designed to support a catalytic material and consisting of helically wound metal foils, arranged so that flat metal foils 4 alternate with corrugated metal foils, so as to form through-flow channels 5 extending through the catalyst body 1. The monolith 3 has a width or diameter that is slightly smaller than the internal width of the casing 2. Accordingly, a gap 6 forms between the casing 2 and the monolith 3, the size of which varies within different temperature ranges.
In accordance with the invention, the casing 2 is provided with at least one band-like depression 7, in accordance with the embodiment illustrated in the drawing figure with two such depressions, the gap 6 around the monolith 3 thus being eliminated in the area opposite said depressions. Along these depressions 7 the casing 2 and the monolith 3 are interconnected, preferably only at spaced intervals 8, for instance by means of soldering or welding. When the monolith 3 is heated by the exhaust gases flowing through it, the monolith 3 expands quicker than the casing 2, which is due partly to the more intimate contact of the monolith 3 with the hot exhaust gases, partly to the larger material thickness of the casing 2. The expansion may now take place essentially unimpededly, with the exception of in the area of the depressions 7 where a certain deformation of the outermost foil 4 of the monolith 3 will take place. Consequently, no compressive forces will generate along the major part of the surface of the monolith 3. When the casing and the monolith 3 again cool down, the monolith 3 may again retract and thus again open up a gap 6.
Because the monolith 3 is exposed only to minor local deformations in the area of the depressions 7 and is allowed to expand and contract freely elsewhere, the catalyst body 1 may operate in an intact condition over a longer period than has hitherto been possible, with consequential increase of its serviceable life. Further improvements may be achieved by omitting to join one or some of the outermost foils 4 along the entire foil length to the the foils immediately interiorly thereof but instead joining them to one another at points spaced laterally from the points 8 of attachment. When the monolith 3 cools down, with consequential contraction, the tensile forces at the points 8 of attachment will not be very pronounced because of the resiliency imparted to the outermost foils 4 between their interconnection points. Figs. 2 and 3 illustrate a modification of the mode of attachment in accordance with the invention. In this case, an exhaust pipe 9 serves as the casing. In accordance with this modification, the monolith 3 is provided at each end with a circumferential collar 10 which projects past its associated monolith end and which is attached to the exhaust pipe 9. In the same manner as in accordance with the embodiment of Fig. 1, the collars 10 preferably are attached to the monolith 3 at discrete intervals 12. The collars 10 bridge a gap 11 formed between the exhaust pipe 9 and the monolith 3, the latter thus, upon heating and cooling, being given a compara- tively free space in which to expand and contract while at the same time it is securely anchored inside the exhaust pipe 9.
The invention is not limited to the embodiments as shown and described but could be modified in a variety of ways within the scope of the appended claims. For instance, the gap 6 could be eliminated by introduction of one or several inserts between the casing 2 and the monolith 3 instead of by forming depressions 7 in the casing.

Claims

1. A carrier arrangement for catalytic converters of the kind comprising a catalyst body (1) which consists of a monolith (3) of carrier members designed to support a catalytic material, said carrier members formed by superposed, alternately flat and corrugated metal foils (4) which are helically wound to form through-flow channels (5) extending through the catalyst body (1), and of a metal casing (2, 9) , the material thickness of which exceeds that of the metal foils (4) and which casing encloses the monolith (3), c h a r a c t e r i z e d in that the interior width of the casing (2, 9) exceeds that of the monolith (3), whereby a gap (6, 11) forms between the casing (2, 9) and the monolith (3), and in that said gap (6, 11) is bridged at least in the area of a section (7, 10) extending circumferentially around the monolith (3) , said monolith (3) being attached to the casing (2, 9) along said section (7, 10) .
2. An arrangement as claimed in claim 1, c h a ¬ r a c t e r i z e d in that the gap (6) is bridged in the area of said section (7) by a radial depression of the casing (2) .
3. An arrangement as claimed in claim 1, c h a ¬ r a c t e r i z e d in that in the area of said section (7) the monolith (3) is attached to the casing (2) only in some points (8) circumferentially around the monolith.
4. An arrangement as claimed in claim 1, c h a ¬ r a c t e r i z e d in that the monolith (3) is formed at each end with a circumferential collar (10) which bridges the gap (11) between the monolith (3) and the casing (9) and which is attached to said casing (9) .
5. An arrangement as claimed in claim 4, c h a ¬ r a c t e r i z e d in that the collar (10) is attached to the monolith (3) only at some points (12) along the monolith circumference.
PCT/SE1996/000499 1995-04-27 1996-04-18 A catalyst carrier arrangement Ceased WO1996034188A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP8532022A JPH11504094A (en) 1995-04-27 1996-04-18 Catalyst support device
AU54120/96A AU5412096A (en) 1995-04-27 1996-04-18 A catalyst carrier arrangement
DE69629196T DE69629196T2 (en) 1995-04-27 1996-04-18 CATALYST ARRANGEMENT
EP96911153A EP0840840B1 (en) 1995-04-27 1996-04-18 A catalyst carrier arrangement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9501556A SE506670C2 (en) 1995-04-27 1995-04-27 Catalyst mounting arrangement
SE9501556-6 1995-04-27

Publications (1)

Publication Number Publication Date
WO1996034188A1 true WO1996034188A1 (en) 1996-10-31

Family

ID=20398107

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1996/000499 Ceased WO1996034188A1 (en) 1995-04-27 1996-04-18 A catalyst carrier arrangement

Country Status (9)

Country Link
EP (1) EP0840840B1 (en)
JP (1) JPH11504094A (en)
KR (1) KR19990008026A (en)
CN (1) CN1084429C (en)
AU (1) AU5412096A (en)
DE (1) DE69629196T2 (en)
ES (1) ES2203689T3 (en)
SE (1) SE506670C2 (en)
WO (1) WO1996034188A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042964A1 (en) * 1997-03-21 1998-10-01 Sven Melker Nilsson Improvements in catalytic reactors
WO1999027240A1 (en) * 1997-11-21 1999-06-03 Nilcon Engineering Ab Catalytic converter and method for mounting of converter
EP1136669A2 (en) 2000-03-21 2001-09-26 Kemira Metalkat Oy Catalyst carrier
RU2186226C2 (en) * 1997-03-21 2002-07-27 Кемира Металкат Ои Catalytic reactor
EP1230978A1 (en) * 2001-02-12 2002-08-14 Kemira Metalkat Oy Corrugated metal reactor packing and manufacturing method thereof
CN1096542C (en) * 1997-03-21 2002-12-18 凯米拉梅塔尔卡特公司 Improvements in catalytic reactors
JP2008132497A (en) * 2008-02-14 2008-06-12 Ecocat Oy Improved catalytic reactor
WO2019149943A1 (en) * 2018-02-05 2019-08-08 Cpt Group Gmbh Catalytic converter and method for the production thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0212243A1 (en) * 1985-07-25 1987-03-04 INTERATOM Gesellschaft mit beschränkter Haftung Mounting device for a metallic flue gas catalyst support body, and method of manufacturing it
WO1990004087A1 (en) * 1988-10-11 1990-04-19 Emitec Gesellschaft Für Emissionstechnologie Mbh Catalyst with a double casing system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0721855Y2 (en) * 1987-07-10 1995-05-17 日産自動車株式会社 Catalytic converter device
DE3926072C2 (en) * 1989-08-07 1994-01-13 Emitec Emissionstechnologie Exhaust gas purification catalyst with elastic elements to compensate for longitudinal expansion
DE3930680A1 (en) * 1989-09-14 1991-03-28 Behr Gmbh & Co Radial and axial movements of expanding exhaust purifier - matrix in housing are permitted by fixed and mobile supports incorporating spring strips
JPH0634927B2 (en) * 1989-11-16 1994-05-11 トヨタ自動車株式会社 Metal carrier for exhaust gas purification catalyst

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0212243A1 (en) * 1985-07-25 1987-03-04 INTERATOM Gesellschaft mit beschränkter Haftung Mounting device for a metallic flue gas catalyst support body, and method of manufacturing it
WO1990004087A1 (en) * 1988-10-11 1990-04-19 Emitec Gesellschaft Für Emissionstechnologie Mbh Catalyst with a double casing system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042964A1 (en) * 1997-03-21 1998-10-01 Sven Melker Nilsson Improvements in catalytic reactors
US6267932B1 (en) * 1997-03-21 2001-07-31 Kemira Metalkat Oy Catalytic reactors
RU2186226C2 (en) * 1997-03-21 2002-07-27 Кемира Металкат Ои Catalytic reactor
CN1096542C (en) * 1997-03-21 2002-12-18 凯米拉梅塔尔卡特公司 Improvements in catalytic reactors
WO1999027240A1 (en) * 1997-11-21 1999-06-03 Nilcon Engineering Ab Catalytic converter and method for mounting of converter
US6667013B1 (en) 1997-11-21 2003-12-23 Kemira Metalkat Oy Catalytic converter and method for mounting of converter
EP1136669A2 (en) 2000-03-21 2001-09-26 Kemira Metalkat Oy Catalyst carrier
EP1230978A1 (en) * 2001-02-12 2002-08-14 Kemira Metalkat Oy Corrugated metal reactor packing and manufacturing method thereof
JP2008132497A (en) * 2008-02-14 2008-06-12 Ecocat Oy Improved catalytic reactor
WO2019149943A1 (en) * 2018-02-05 2019-08-08 Cpt Group Gmbh Catalytic converter and method for the production thereof
US11359533B2 (en) 2018-02-05 2022-06-14 Vitesco Technologies GmbH Catalytic converter and method for the production thereof

Also Published As

Publication number Publication date
DE69629196T2 (en) 2004-02-19
CN1084429C (en) 2002-05-08
EP0840840B1 (en) 2003-07-23
DE69629196D1 (en) 2003-08-28
SE506670C2 (en) 1998-01-26
JPH11504094A (en) 1999-04-06
KR19990008026A (en) 1999-01-25
EP0840840A1 (en) 1998-05-13
AU5412096A (en) 1996-11-18
SE9501556D0 (en) 1995-04-27
ES2203689T3 (en) 2004-04-16
CN1182468A (en) 1998-05-20
SE9501556L (en) 1996-10-28

Similar Documents

Publication Publication Date Title
US5079210A (en) Metallic support for exhaust gas purifying catalyst
KR100495790B1 (en) Honeycombed body with heat insulation, preferably for an exhaust gas catalyzer
CA2322920C (en) Exhaust pipe assembly of two-passage construction
EP0840840B1 (en) A catalyst carrier arrangement
JP2004509264A (en) Honeycomb body with a jacket tube with slits
JP3845873B2 (en) Ceramic catalytic converter
US7241427B2 (en) Catalyst carrier body with sleeve and shortened tubular jacket and catalytic converter having the catalyst carrier body
KR100563778B1 (en) Catalytic converter and mounting method
KR100880755B1 (en) Shrink Limiter for Honeycomb
US20020150518A1 (en) Gas treatment device
EP0873045A1 (en) Electromagnetic induction heater and operation method therefor
JP3667811B2 (en) Metal carrier
US6267932B1 (en) Catalytic reactors
JPH06126191A (en) Exhaust gas purification device
JP3716031B2 (en) Metal carrier for catalyst equipment
JP3199936B2 (en) Metal carrier
JPH0621551Y2 (en) Metal carrier for exhaust gas purification catalyst
RU2259490C2 (en) Tubular casing for cellular element used for neutralization of exhaust gases, and catalyst converter
JP2011058451A (en) Exhaust emission control device and method for manufacturing the same
JP3217597B2 (en) Metal carrier for catalyst device
JP3808993B2 (en) Metal carrier by diffusion bonding
JP2820444B2 (en) Metallic support for catalysts with excellent thermal fatigue resistance
JP3309147B2 (en) Metal carrier for exhaust gas purification catalyst
JPH1052626A (en) Catalytic converter and exhaust gas purification device
JPH10235205A (en) Metal catalytic converter and method of manufacturing the same

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 96193516.2

Country of ref document: CN

AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AT AU AZ BB BG BR BY CA CH CN CZ CZ DE DE DK DK EE ES FI FI GB GE HU IS JP KE KG KP KR KZ LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SK TJ TM TR TT UA UG US UZ VN AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
ENP Entry into the national phase

Ref document number: 1996 532022

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 1996911153

Country of ref document: EP

Ref document number: 1019970707550

Country of ref document: KR

ENP Entry into the national phase

Ref document number: 1997 945382

Country of ref document: US

Date of ref document: 19971027

Kind code of ref document: A

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWP Wipo information: published in national office

Ref document number: 1996911153

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: CA

WWP Wipo information: published in national office

Ref document number: 1019970707550

Country of ref document: KR

WWG Wipo information: grant in national office

Ref document number: 1996911153

Country of ref document: EP

WWR Wipo information: refused in national office

Ref document number: 1019970707550

Country of ref document: KR

WWW Wipo information: withdrawn in national office

Ref document number: 1996911153

Country of ref document: EP