EP0121174A1 - Support de catalyseur à fentes de dilatation pour moteurs à combustion interne - Google Patents

Support de catalyseur à fentes de dilatation pour moteurs à combustion interne Download PDF

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Publication number
EP0121174A1
EP0121174A1 EP84103015A EP84103015A EP0121174A1 EP 0121174 A1 EP0121174 A1 EP 0121174A1 EP 84103015 A EP84103015 A EP 84103015A EP 84103015 A EP84103015 A EP 84103015A EP 0121174 A1 EP0121174 A1 EP 0121174A1
Authority
EP
European Patent Office
Prior art keywords
slots
catalyst carrier
carrier body
catalyst
matrix
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.)
Granted
Application number
EP84103015A
Other languages
German (de)
English (en)
Other versions
EP0121174B1 (fr
Inventor
Theodor Dipl.-Ing. Cyron
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.)
Interatom Internationale Atomreaktorbau GmbH
Original Assignee
Interatom Internationale Atomreaktorbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Interatom Internationale Atomreaktorbau GmbH filed Critical Interatom Internationale Atomreaktorbau GmbH
Priority to AT84103015T priority Critical patent/ATE22154T1/de
Publication of EP0121174A1 publication Critical patent/EP0121174A1/fr
Application granted granted Critical
Publication of EP0121174B1 publication Critical patent/EP0121174B1/fr
Expired 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
    • F01N3/2803—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
    • 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 present invention relates to a metallic carrier body for coatings of catalytically active substances for cleaning exhaust gases, in particular for internal combustion engines.
  • These metallic catalyst carrier bodies consist of a carrier matrix with spirally wound, very thin-walled, smooth and / or corrugated metal strips, which are joined together in a circular-cylindrical or oval-cylindrical jacket tube by welding, soldering or gluing.
  • the object of the present invention is a catalyst carrier body for the exhaust gases of internal combustion engines from smooth and / or corrugated metal strips spirally wound and fastened in a casing tube, which avoids the disadvantages mentioned above.
  • a catalyst body according to the first claim Due to the proposed longitudinal division of the matrix body by means of radial or tendon-shaped slots into several sectors or zones over the cross-section, the spirally wound, rigid matrix structure becomes in its ring structure of the mutually supported matrix cells interrupted. Theoretically, the thermal expansion of the matrix body is prevented as a quasi full-surface body against the colder jacket tube.
  • the individual sectors of the carrier matrix are fastened in a stable bond with the jacket pipe by means of a joining connection and, under thermal stress, have unrestricted expansion options in the direction of the free spaces created by the slots, which prevents plastic alternating deformations of the matrix cells with the consequences of destruction and detachment of the carrier matrix.
  • the slots can, for example, after joining the catalyst carrier body by welding, soldering, gluing or other joining processes by means of thermal, chemical, mechanical or other separation and removal processes, such as laser beam burning, chemical sinking, spark erosion, etc. Vibration saws, rooms, etc., are introduced into the carrier matrix.
  • the jacket tube remains undamaged. Since the center of the carrier matrix may consist of more densely wound sheet metal layers, it may be advantageous not to pass the slots through this core, but only up to or close to it. This does not affect the beneficial effects of the slots. Also, the slits do not have to have the width required for the stretching during production, since the carrier matrix expands and plastically deforms during the first heating, so that the slits then have the exactly necessary width when they cool down. In this case, it has an advantageous effect that the slots are practically closed at operating temperature and leave no undesired path for the gas.
  • the slots the total length of the catalyst carrier cover the body.
  • the catalyst carrier body then consists of various segments fastened to the casing tube, which can expand unhindered in the free space formed by the slots. Since, as stated above, the slots are practically closed at operating temperature, but at least not larger than the other openings, the slots do not have any disadvantages during operation. However, they prevent tension and plastic deformation of the individual segments during cooling, since these can now contract individually in the direction of the jacket tube.
  • the slots are arranged axially parallel in the longitudinal direction.
  • Such axially parallel slots can be made most easily retrospectively with a fully wound catalyst carrier body.
  • the slots on the front and rear of the catalyst carrier body are offset from one another and arranged over a portion of its total length. If the slits overlap in the middle of the body, the advantages mentioned above are retained with this arrangement. In addition, even when the catalyst carrier body is cold, there is no continuous gap through which gases could escape.
  • the catalyst carrier body from two or more slotted disks arranged at a distance from one another in the casing tube.
  • the division of the total catalyst length into several narrow sections with spaces in between leads to another advantage. Calculations and tests have shown that with the usual dimensions and the gas velocities in the parallel channels of the previous catalytic converters, the flow changes to the laminar state after about 20-30 mm, which is due to the lack of surface contacting of the exhaust gas for the chemical processes taking place in a catalytic converter is less favorable than a turbulent flow. Due to the division into a plurality of partial catalyst bodies arranged one behind the other in the direction of flow, the flow to each catalyst portion is only in the turbulent state, which considerably improves the catalytic effectiveness. When the exhaust gas emerges from the previous catalyst section into the intermediate space to the next section, the exhaust gas mixes very well, which also contributes to improving the catalytic efficiency in terms of heat distribution, light-off behavior and conversion rate.
  • FIG. 1 shows a cross section through FIG. 1.
  • a cross section through another embodiment of the invention is also shown schematically.
  • the catalyst carrier body is divided by three tendon-shaped slots 11, 12, 13 into six cross-sectional segments, which are each attached to the casing tube 2 by joining technology. These slots do not go through the entire catalyst carrier body but only up to the middle or a little bit beyond. From the other side there are also slots 14, 15, 16 in the catalyst carrier body, which are offset from the slots 11, 12, 13. This is indicated in Fig. 3 by dashed lines.
  • the slots 21 show a possibility of arranging the slots, which avoids cutting through the more tightly wound center 20 of the catalyst carrier body.
  • the slots 21 lead tangentially to the denser wound center 20 and end in its vicinity. Even if the resulting segments are not completely separated from one another in this exemplary embodiment, the matrix deforms during the first operation in such a way that the advantages mentioned above are essentially also present in this arrangement of the slots.

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)
  • Catalysts (AREA)
  • Exhaust Gas After Treatment (AREA)
EP84103015A 1983-03-30 1984-03-19 Support de catalyseur à fentes de dilatation pour moteurs à combustion interne Expired EP0121174B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84103015T ATE22154T1 (de) 1983-03-30 1984-03-19 Katalysator-traegerkoerper fuer verbrennungskraftmaschinen mit dehnungsschlitzen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3311654 1983-03-30
DE19833311654 DE3311654A1 (de) 1983-03-30 1983-03-30 Katalysator-traegerkoerper fuer verbrennungskraftmaschinen mit dehnungsschlitzen

Publications (2)

Publication Number Publication Date
EP0121174A1 true EP0121174A1 (fr) 1984-10-10
EP0121174B1 EP0121174B1 (fr) 1986-09-10

Family

ID=6195130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84103015A Expired EP0121174B1 (fr) 1983-03-30 1984-03-19 Support de catalyseur à fentes de dilatation pour moteurs à combustion interne

Country Status (3)

Country Link
EP (1) EP0121174B1 (fr)
AT (1) ATE22154T1 (fr)
DE (2) DE3311654A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0245738A1 (fr) * 1986-05-12 1987-11-19 INTERATOM Gesellschaft mit beschränkter Haftung Corps métallique en forme de nid d'abeilles, en particulier support pour catalyseur, avec paroi de support, et son procédé de fabrication
US4777158A (en) * 1985-08-19 1988-10-11 Interatom Gmbh Method for the selective brazing of a metallic catalyst carrier body and a correspondingly produced catalyst carrier body
US4832998A (en) * 1986-05-12 1989-05-23 Interatom Gmbh Honeycomb body, especially a catalyst carrier body having sheet metal layers twisted in opposite directions and a method for producing the same
US5146743A (en) * 1988-04-25 1992-09-15 Emitec Gesellschaft Fur Emissionstechnologie Mbh Process for accelerating the response of an exhaust gas catalyst, and apparatus and electrically heatable carrier bodies for performing the method
US5340020A (en) * 1989-06-20 1994-08-23 Emitec Gesellschaft Fuer Emissiontechnologie Mbh Method and apparatus for generating heat by flameless combustion of a fuel in a gas flow
EP0774053B1 (fr) * 1992-12-15 1998-09-02 Sandvik Aktiebolag Pot catalytique pour ligne d'echappement de moteur

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3602134A1 (de) * 1986-01-24 1987-07-30 Daimler Benz Ag Vorrichtung zum reinigen von brennkraftmaschinen-abgasen mit einem in ein gehaeuse eingeloeteten metall-matrix-katalysator
DE3738537A1 (de) * 1987-11-13 1989-06-01 Sueddeutsche Kuehler Behr Verfahren und vorrichtung zur herstellung eines traegerkoerpers fuer einen katalytischen reaktor
JPH0619793Y2 (ja) * 1988-11-30 1994-05-25 臼井国際産業株式会社 排気ガス浄化装置
DE3926072C2 (de) * 1989-08-07 1994-01-13 Emitec Emissionstechnologie Katalysator zur Abgasreinigung mit elastischen Elementen zum Ausgleich von Längsdehnungen
DE4300477A1 (de) * 1993-01-11 1994-07-14 Emitec Emissionstechnologie Extrudierter Wabenkörper aus keramischem und/oder metallischem Material mit erhöhter Flexibilität
US5866230A (en) * 1993-01-11 1999-02-02 Emitec Gesellschaft Fuer Emissionstechnologie Gmbh Extruded honeycomb body of ceramic and/or metallic material with increased flexibility
DE102022212290A1 (de) * 2022-11-18 2024-05-23 Emitec Technologies GmbH Vorrichtung zur Abgasnachbehandlung mit einer geschlitzten Matrix

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755120A (en) * 1972-02-03 1973-08-28 New Prod Corp Internal combustion engine exhaust catalytic reactor, with electrical charge means
FR2214818A1 (fr) * 1973-01-20 1974-08-19 Sueddeutsche Kuehler Behr
US3887741A (en) * 1973-08-13 1975-06-03 Corning Glass Works Thin-walled honeycombed substrate with axial discontinuities in the periphery
US3983283A (en) * 1974-03-18 1976-09-28 Corning Glass Works Honeycombed structures having open-ended cells formed by interconnected walls with longitudinally extending discontinuities

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755120A (en) * 1972-02-03 1973-08-28 New Prod Corp Internal combustion engine exhaust catalytic reactor, with electrical charge means
FR2214818A1 (fr) * 1973-01-20 1974-08-19 Sueddeutsche Kuehler Behr
US3887741A (en) * 1973-08-13 1975-06-03 Corning Glass Works Thin-walled honeycombed substrate with axial discontinuities in the periphery
US3983283A (en) * 1974-03-18 1976-09-28 Corning Glass Works Honeycombed structures having open-ended cells formed by interconnected walls with longitudinally extending discontinuities

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4777158A (en) * 1985-08-19 1988-10-11 Interatom Gmbh Method for the selective brazing of a metallic catalyst carrier body and a correspondingly produced catalyst carrier body
EP0245738A1 (fr) * 1986-05-12 1987-11-19 INTERATOM Gesellschaft mit beschränkter Haftung Corps métallique en forme de nid d'abeilles, en particulier support pour catalyseur, avec paroi de support, et son procédé de fabrication
US4803189A (en) * 1986-05-12 1989-02-07 Interatom Gmbh Catalyst carrier of metallic honeycomb having a supporting wall and a method for producing the same
US4832998A (en) * 1986-05-12 1989-05-23 Interatom Gmbh Honeycomb body, especially a catalyst carrier body having sheet metal layers twisted in opposite directions and a method for producing the same
US4923109A (en) * 1986-05-12 1990-05-08 Interatom Gmbh Method for producing a honeycomb body, especially a catalyst carrier body having sheet metal layers twisted in opposite directions
US4946822A (en) * 1986-05-12 1990-08-07 Interatom Gmbh Catalyst carrier body having a supporting wall and a method for producing the same
US5146743A (en) * 1988-04-25 1992-09-15 Emitec Gesellschaft Fur Emissionstechnologie Mbh Process for accelerating the response of an exhaust gas catalyst, and apparatus and electrically heatable carrier bodies for performing the method
US5322672A (en) * 1988-04-25 1994-06-21 Emitec Gesellschaft Fuer Emissionstechnologie Electrically conductive honeycomb body, and method of monitoring and operating it as an exhaust gas catalyst carrier body
US5480621A (en) * 1988-04-25 1996-01-02 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Electrically conductive honeycomb as an exhaust gas catalyst carrier body
US5340020A (en) * 1989-06-20 1994-08-23 Emitec Gesellschaft Fuer Emissiontechnologie Mbh Method and apparatus for generating heat by flameless combustion of a fuel in a gas flow
EP0774053B1 (fr) * 1992-12-15 1998-09-02 Sandvik Aktiebolag Pot catalytique pour ligne d'echappement de moteur

Also Published As

Publication number Publication date
DE3311654A1 (de) 1984-10-04
ATE22154T1 (de) 1986-09-15
EP0121174B1 (fr) 1986-09-10
DE3460660D1 (en) 1986-10-16

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