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WO1994017289A1 - Corps alveole metallique ayant une structure electro-conductrice - Google Patents

Corps alveole metallique ayant une structure electro-conductrice Download PDF

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Publication number
WO1994017289A1
WO1994017289A1 PCT/EP1994/000046 EP9400046W WO9417289A1 WO 1994017289 A1 WO1994017289 A1 WO 1994017289A1 EP 9400046 W EP9400046 W EP 9400046W WO 9417289 A1 WO9417289 A1 WO 9417289A1
Authority
WO
WIPO (PCT)
Prior art keywords
honeycomb body
conductor
connection
housing
jacket
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/EP1994/000046
Other languages
German (de)
English (en)
Inventor
Rolf BRÜCK
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 WO1994017289A1 publication Critical patent/WO1994017289A1/fr
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
    • F01N3/2803—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
    • 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
    • F01N3/18—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 methods of operation; Control
    • F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/022—Heaters specially adapted for heating gaseous material
    • H05B2203/024—Heaters using beehive flow through structures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a metallic honeycomb body through which a fluid can flow, with a metallic housing and with an electrically conductive structure which is electrically insulated from the honeycomb body at least in some areas and which is in good thermal contact with the honeycomb body or directly with the fluid, the structure can be connected via at least one connection to a power supply line arranged outside the housing and the connection is guided through the housing in an electrically insulated manner.
  • Honeycomb bodies with such structures are used in particular as electrically heatable catalyst carrier bodies in catalytic converters for cleaning motor vehicle exhaust gases. Such structures are also used as temperature sensors.
  • heating structures are described in WO 92/02714, the honeycomb bodies in this document practically consisting only of heating structures.
  • Such arrangements are described, for example, in the unpublished German patent application P 41 29 893.4 or the likewise unpublished German patent application P 42 23 134.5.
  • Sheathed conductors are mentioned in these documents as particularly suitable measuring or heating structures, that is to say electrical conductors which are arranged in a metallic sheath and separated from it by a ceramic, usually powder-like insulation. Such sheathed conductors can in particular be rolled between two thin sheets.
  • the object of the present invention is to avoid the above-described disadvantages of the prior art and to create a honeycomb body with a measuring or heating structure which does not heat up excessively in the area of the connection and therefore z. B. can be connected with copper cables in a reliable manner or which in the area of the connection does not cause any resistance changes which strongly influence the measurement as a function of the temperature in the case of temperature sensors.
  • a fluid-flowable metallic honeycomb body with a metallic housing in particular an electrically heatable catalyst carrier body for cleaning motor vehicle exhaust gases, is used, with an electrically conductive structure that is electrically insulated from the honeycomb body at least in some areas and that is in good thermal contact with the Honeycomb body or directly with the fluid, the structure being connectable via at least one connection to a power supply line arranged outside the housing and the connection being guided through the housing in an electrically insulated manner, the connection and the structure also having a lower resistance in the region of the connection than the structure in the interior of the honeycomb body.
  • the inventive idea can be realized in that the conductor and the sheath have a larger cross section in the area of the connection than in the interior of the honeycomb body. The enlargement of the cross-section must go so far that overheating to critical temperatures cannot take place in the area of the connection or the resistance is reduced to an insignificant size for a measurement.
  • the inside of the measuring or heating conductor generally has a diameter of 10 to 35% of the outer diameter of the sheath, with inner conductors of 15 to 25% of the diameter of the sheath advantageously being used for the present applications.
  • Such sheathed conductors can be reduced from an originally large diameter to a much smaller diameter by pulling, hammering or rolling, the length increasing accordingly.
  • Sheathed conductors which have an original sheath diameter of 4 to 4 at the ends are particularly suitable for the present invention 8 mm, but in the area in between are reduced to a diameter of 0.5 to 2 mm.
  • Particularly favorable values are a diameter of approximately 5 mm in the area of the connections and a diameter of approximately 1 mm in the interior of the honeycomb body.
  • the metallic jacket can be welded to the housing in a sealing manner, which is important for many arrangements, in particular in the case of catalytic converters for motor vehicles.
  • a honeycomb body with an integrated measuring or heating conductor is first wound spirally, layered or otherwise entwined in a manner known per se and then inserted into a housing.
  • the housing has a slot from the front to the area of the connection through which the measuring or heating conductor with the jacket can be pushed into the desired position.
  • the housing can then be tightly sealed by subsequently welding the slot and the casing to the housing.
  • the production of a honeycomb body with an integrated measuring or heating conductor differs in many cases from the known production of metallic honeycomb bodies without a measuring or heating conductor.
  • FIG. 1 shows a schematic longitudinal section through a sheathed conductor with thickened ends
  • FIG. 2 shows a sheathed conductor rolled in between two sheets in cross section
  • FIG. 3 schematically shows the U-shaped course of a measuring or heating conductor within a bending position of a honeycomb body
  • 4 shows a cuboid honeycomb body made of alternately stacked smooth and corrugated sheets with an integrated measuring or heating conductor
  • Fig. 5 shows a typical catalyst carrier body with an integrated measuring or heating conductor, such as by gobbling in opposite directions
  • Stack of sheets according to FIG. 4 can be produced.
  • the inner conductor 1 shows a sheathed conductor with an inner conductor 1 and a metallic sheath 2, which are insulated from one another by an insulating layer 3.
  • the inner conductor 1 has thickened ends 4, in which the electrical resistance is considerably lower than in the thin area.
  • the jacket is also thickened in the end regions 5 and has an external thread 6 at the very end.
  • the thickened inner conductor 4 has a piece 7 which protrudes beyond the thickened jacket 5 and its end 6 provided with an external thread. This protruding piece 7 can be inserted directly into a socket 8 as a plug, and the plug connection can be secured by means of the union nut 9 and the external thread 6.
  • the outer diameter D in the area of the connections is, for example, 5 mm, while the outer diameter d of the jacket in the interior of the honeycomb body can be, for example, approximately 1 mm.
  • the diameter of the inner conductor 1 or 4 is 15 to 25%, preferably about 20%, of the outer diameter of the jacket.
  • Fig. 2 shows schematically how a sheathed conductor can be arranged between two sheets 11, 12.
  • the inner conductor 1 with the electrical insulation 3 surrounding it and the outer sheath 2 lies in a bulge 13 of the metal sheets 11, 12, this shape being able to be produced, for example, by rolling in with elastic rollers.
  • the sheets 11, 12 can be soldered to one another on the side regions 14 to increase the stability of the structure.
  • Such an arrangement can also be corrugated by corrugated rollers, so that a measuring or heating conductor can be integrated not only in smooth sheet metal layers but also in corrugated sheet metal layers.
  • Fig. 3 shows schematically that a sheathed conductor 2 can also run in a U-shape in or on a sheet metal layer 11, which is advantageous if the connections are to be close to each other.
  • a cuboid honeycomb body 20 is shown schematically, which consists of alternating layers of smooth 21 and corrugated 22 sheets.
  • a sheathed conductor is integrated in its interior between two smooth sheet metal layers 11, 12, the thickened end 25 of which protrudes laterally.
  • the sheathed conductor 25 in turn extends in bulges 13 of the sheet metal layers 11, 12.
  • the sheathed conductor 25 has two inner conductors 27, 28, which are preferably connected to one another at their other ends, so that a U-shaped loop results overall.
  • FIG. 5 shows a typical honeycomb body for catalytic converters of motor vehicles, as can be produced in a manner known per se from a stack of sheets shown in FIG. 4 by intertwining the ends around two fixed points 33, 34.
  • This honeycomb body 30 has a housing 35 which has a slot 31 starting from an end face. Between two sheet metal layers 11, 12 of the honeycomb body 13, a sheathed conductor is again integrated, the thickened end 5 of which is guided through the housing 35 to the outside with an external thread 6 and a projecting piece 7 of the inner conductor.
  • Such a body is produced by first swallowing a body according to FIG. 4 in opposite directions and then pushing it into the housing 35 from one end face becomes. The connector 5, 6, 7 is pushed through the slot 31 into the desired position. Subsequently, the slot 31 can be welded, as indicated in the drawing, a tight connection 32 being produced between the casing 5 and the housing 35 at the same time.
  • the present invention is particularly suitable for the electrical heating of and / or the temperature measurement in catalytic converters for motor vehicles.
  • the invention is particularly advantageous to use in cases in which a voltage higher than 12 volts is to be used for heating. When heating with 12 volts, high currents are required, which in turn require thick supply lines and relatively complex switching devices. This effort can be partially avoided by heating with a higher voltage if a corresponding voltage converter is available.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (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

Un corps alvéolé métallique pouvant être traversé par un fluide comprend un boîtier métallique et une structure (1, 4) électro-conductrice isolée électriquement du corps alvéolé au moins par endroits. Cette structure est en contact thermique franc avec le corps alvéolé ou en contact direct avec le fluide. La structure (1, 4) peut être reliée par au moins un raccord (6, 7) avec une ligne d'alimentation (8) disposée à l'extérieur du boîtier. Le raccord (5, 6, 7) est guidé de manière électriquement isolée à travers le boîtier. Le raccord (5, 6, 7) et la structure (4) dans la zone du raccord (5, 6, 7) ont une résistance plus faible que la structure (1) à l'intérieur du corps alvéolé. L'invention convient tout particulièrement aux supports de catalyseurs chauffables électriquement pour épurer les gaz d'échappement d'automobiles, lorsque le chauffage doit être assuré par des tensions supérieures à 12 volts. L'invention convient également aux détecteurs de température situés dans les supports de catalyseurs. La diminution de la résistance due au fait que les extrémités de la structure sont plus épaisses, évite une surchauffe dans cette zone dans les conducteurs chauffants et permet de raccorder la structure de manière fiable à des câbles en cuivre. Pour ce qui est des palpeurs de température, la diminution de la résistance en dehors de la zone de mesure effective permet d'effectuer des mesures plus précises.
PCT/EP1994/000046 1993-01-26 1994-01-10 Corps alveole metallique ayant une structure electro-conductrice Ceased WO1994017289A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4302068.2 1993-01-26
DE4302068A DE4302068A1 (de) 1993-01-26 1993-01-26 Metallischer Wabenkörper mit einer elektrisch leitfähigen Struktur

Publications (1)

Publication Number Publication Date
WO1994017289A1 true WO1994017289A1 (fr) 1994-08-04

Family

ID=6478944

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1994/000046 Ceased WO1994017289A1 (fr) 1993-01-26 1994-01-10 Corps alveole metallique ayant une structure electro-conductrice

Country Status (3)

Country Link
DE (1) DE4302068A1 (fr)
TW (1) TW247279B (fr)
WO (1) WO1994017289A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8273301B2 (en) 2008-10-10 2012-09-25 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Exhaust-gas treatment device having a sensor foil
US9393521B2 (en) 2012-01-13 2016-07-19 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Electrically heatable honeycomb body with multiple sheet metal layers electrically connected with a connecting pin

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19508376A1 (de) * 1995-03-10 1996-09-12 Roth Technik Gmbh Elektrisch beheizbarer Katalysator
JP3494498B2 (ja) * 1995-04-17 2004-02-09 日本碍子株式会社 電極構造および通電発熱式ヒーター
DE102015111689C5 (de) 2015-07-17 2022-09-01 Türk & Hillinger GmbH Elektrisch beheizbarer Katalysator und Verfahren zu dessen Herstellung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB165443A (en) * 1920-06-22 1922-08-01 Cutler Hammer Mfg Co Improvements in or relating to electric heaters
FR841216A (fr) * 1938-07-26 1939-05-15 Fond Arthur Martin Radiateur électrique
DE728737C (de) * 1940-08-24 1942-12-03 Karl Stegmaier Elektrischer Widerstand mit einem elektrischen Leiter, der in festem und fluessigem Zustand verwendet werden kann
JPS56164931A (en) * 1980-05-24 1981-12-18 Nippon Soken Inc Temperature detector
US4317367A (en) * 1977-03-18 1982-03-02 Milton Schonberger Fever thermometer, or the like sensor
EP0419906A1 (fr) * 1989-09-12 1991-04-03 W.R. Grace & Co.-Conn. Elément de noyau et noyau pour un catalyseur électriquement chauffable
WO1991014855A1 (fr) * 1990-03-19 1991-10-03 Emitec Gesellschaft Für Emissionstechnologie Mbh Procede et dispositif permettant de surveiller le fonctionnement d'un catalyseur dans un moteur a combustion interne
WO1992002714A1 (fr) * 1990-07-30 1992-02-20 Emitec Gesellschaft Für Emissionstechnologie Mbh Corps en nid d'abeilles a chauffage electrique, notamment corps de support de catalyseur, a structures internes de support

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1258524B (de) * 1961-02-17 1968-01-11 Philips Nv Elektrisches Heizelement und Verfahren zu dessen Herstellung
US3768982A (en) * 1971-06-22 1973-10-30 Ford Motor Co Catalytic converter with electrically preheated catalyst

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB165443A (en) * 1920-06-22 1922-08-01 Cutler Hammer Mfg Co Improvements in or relating to electric heaters
FR841216A (fr) * 1938-07-26 1939-05-15 Fond Arthur Martin Radiateur électrique
DE728737C (de) * 1940-08-24 1942-12-03 Karl Stegmaier Elektrischer Widerstand mit einem elektrischen Leiter, der in festem und fluessigem Zustand verwendet werden kann
US4317367A (en) * 1977-03-18 1982-03-02 Milton Schonberger Fever thermometer, or the like sensor
JPS56164931A (en) * 1980-05-24 1981-12-18 Nippon Soken Inc Temperature detector
EP0419906A1 (fr) * 1989-09-12 1991-04-03 W.R. Grace & Co.-Conn. Elément de noyau et noyau pour un catalyseur électriquement chauffable
WO1991014855A1 (fr) * 1990-03-19 1991-10-03 Emitec Gesellschaft Für Emissionstechnologie Mbh Procede et dispositif permettant de surveiller le fonctionnement d'un catalyseur dans un moteur a combustion interne
WO1992002714A1 (fr) * 1990-07-30 1992-02-20 Emitec Gesellschaft Für Emissionstechnologie Mbh Corps en nid d'abeilles a chauffage electrique, notamment corps de support de catalyseur, a structures internes de support

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 6, no. 51 (P - 108) 6 April 1982 (1982-04-06) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8273301B2 (en) 2008-10-10 2012-09-25 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Exhaust-gas treatment device having a sensor foil
US9393521B2 (en) 2012-01-13 2016-07-19 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Electrically heatable honeycomb body with multiple sheet metal layers electrically connected with a connecting pin

Also Published As

Publication number Publication date
DE4302068A1 (de) 1994-07-28
TW247279B (fr) 1995-05-11

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