EP2904229A1 - Corps en nid d'abeilles extrudé à partir de matériau céramique, à chauffage électrique - Google Patents

Corps en nid d'abeilles extrudé à partir de matériau céramique, à chauffage électrique

Info

Publication number
EP2904229A1
EP2904229A1 EP13774114.6A EP13774114A EP2904229A1 EP 2904229 A1 EP2904229 A1 EP 2904229A1 EP 13774114 A EP13774114 A EP 13774114A EP 2904229 A1 EP2904229 A1 EP 2904229A1
Authority
EP
European Patent Office
Prior art keywords
honeycomb body
face
electrically conductive
electrical conductivity
flow direction
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.)
Withdrawn
Application number
EP13774114.6A
Other languages
German (de)
English (en)
Inventor
Rolf BRÜCK
Peter Hirth
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2904229A1 publication Critical patent/EP2904229A1/fr
Withdrawn legal-status Critical Current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
    • F01N3/18—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 ; Methods of operation or control of catalytic converters
    • 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
    • F01N3/2026—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means directly electrifying the catalyst substrate, i.e. heating the electrically conductive catalyst substrate by joule effect
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
    • 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
    • F01N3/2825—Ceramics
    • F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/06—Ceramic, e.g. monoliths
    • 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
    • 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 the field of electrically heatable honeycomb bodies for use in gas cleaning devices, in particular for exhaust systems of internal combustion engines. It is known to equip cleaning systems for gases with honeycomb bodies through which gases can flow, which are coated with catalytically active material and / or designed as a filter. It is also known to use electrically heatable honeycomb body, either to achieve a temperature required for catalytic conversion processes or a desorption faster, or to ignite accumulated soot particles and / or to accelerate their implementation.
  • honeycomb bodies there are two fundamentally different types of honeycomb bodies, on the one hand extruded honeycomb bodies and on the other hand honeycomb bodies built up of metallic sheet metal layers. While metallic honeycomb bodies are fundamentally suitable for electrical heating because of their electrical conductivity, this is initially not the case with extruded honeycomb bodies, insofar as they are made of ceramic material, which is usually the case. However, it is possible to extrude honeycomb body also made of electrically conductive material, in which case arise electrically conductive honeycomb body, which can be divided by slots so that an electrical current path is formed with suitable properties for electrical heating. Such honeycomb bodies are described, for example, in EP 0 452 125 A2 or EP 0 661 097 A1. A development of such designs, in which used for the extrusion of two different materials with different electrical conductivity is also disclosed in EP 0 637 360 B1. The honeycomb body described therein has a different electrical conductivity on the outside than on the inside.
  • honeycomb bodies have in common that in principle only relatively thin slices are required for typical applications, which in turn are relatively unstable through slots and the materials used, so that the installation in a housing and the combination with other honeycomb bodies a relatively large effort requires and the durability is limited under thermal cycling and mechanical loads.
  • the object of the present invention is to at least partially solve the problems described with reference to the prior art.
  • the object is also to provide an extruded honeycomb body which is electrically heated in a subarea and easy to manufacture and mechanically stable.
  • honeycomb body according to the features of claim 1 and a method for producing such a honeycomb body according to the features of claim 9.
  • Preferred embodiments which can be implemented individually or in a technically meaningful combination with each other, are given in the respective dependent claims , The description, in particular in conjunction with the figures, explains the invention and indicates further embodiments.
  • the honeycomb body extruded from ceramic material, has channels which are separated from one another by walls, a front end side, a rear end side, and a lateral surface, wherein the honeycomb body can be flowed through by a fluid in a flow direction from the front end side to the rear end side.
  • the honeycomb body is in this case less electrically conductive in at least one first subarea than in at least one second subarea, wherein the subareas lie one behind the other in the flow direction.
  • material of the honeycomb body it should be noted that this does not necessarily have to be completely formed with ceramic material, but may also be present here (to a small extent) other materials. These can, for example, interconnect segments of the honeycomb body, realize the electrical conductivity and / or form lines / sensors.
  • the proportion of non-ceramic is regularly so small that the honeycomb body (segmentally) can be produced by means of an extrusion process.
  • the channels (at least for the most part) run straight between the front end side and the rear end side. If appropriate, the channels can also be partially and / or mutually closed on the front side with a stopper if a flow through the walls is to be forced.
  • honeycomb body or its material is designed in particular so that the exhaust gas (fluid) of a combustion process can be conducted there (permanently).
  • a first portion of the honeycomb body adjoins directly to the rear end side. It is further preferred that the second portion adjoins directly to the front end side. It is provided that the first portion and the second portion are connected to each other, so in particular are designed to fit against each other.
  • the honeycomb body (except coating, electrical connections, sensors, etc.) is made in one piece. This arrangement of the subregions with different electrical conductivity in the flow direction one behind the other makes it possible, in particular, to generate a current in flow direction. tion direction relatively short second portion provide that would not be mechanically stable as a single disc, but in connection with the first portion is just as stable as a conventional (one-piece) ceramic honeycomb body. In this case, the electrical conductivity in the second subregion does not have to be distributed homogeneously, but may also be radially different in this subregion, for example.
  • At least one electrically conductive current path is preferably defined, which connects at least two contact regions to one another, the contact regions being arranged on an end face and / or the lateral surface of the honeycomb body.
  • a current path is understood to mean, in particular, a concrete and / or directed and / or limited course of the current through the walls of the second subarea.
  • the current path extends from a connection contact (eg a voltage source) to a predetermined other connection contact (eg an electrical ground).
  • the course is characterized in particular by at least one loop, a turn, a meander, a spiral or the like in the cross section of the honeycomb body in the second partial area.
  • the current path can in particular be designed by electrically insulating regions that extend into the cross section of the honeycomb body.
  • the mechanical stability of the (entire) honeycomb body makes it possible to provide in the second subregion a plurality of electrically conductive current paths, which are preferably each formed with a same electrical resistance. In this way, a large cross-sectional area can be heated very uniformly, which can not be ensured mechanically stable in complicated designs long current paths that extend, for example, meandering over a cross-sectional area in known designs. On the other hand, it is also possible to provide current paths with different electrical resistance in order to heat different cross-sectional areas differently.
  • the electrically conductive portion and thus all conductive current paths are arranged in the region of one of the end sides of the honeycomb body, in particular in the region of the front end side.
  • this also means that the second subarea is adjacent to or encompasses the (front) end side.
  • this can also mean that current paths are provided only in this (second) subregion and not in the other (first) subregion.
  • this is the most commonly used design, because the regions of the honeycomb body located further downstream in the flow direction can be heated most easily by means of a heatable front end face.
  • the second portion has a radially and / or axially inhomogeneous electrical conductivity.
  • a "radial" inhomogeneity is present, in particular, if the second subregion is viewed starting from an axial one Center towards the lateral surface has no constant electrical conductivity and / or several straight connecting lines from the center to the lateral surface have a constant, mutually different electrical conductivity.
  • an "axial" inhomogeneity exists, in particular, if the second subarea viewed from an end face towards a parallel boundary surface (viewed in the direction of the axis) has no constant electrical conductivity and / or has several straight connecting lines from the end side to the boundary surface
  • the inhomogeneity is characterized in particular by a significant deviation, for example at least 20%, 40% or even 70%.
  • a honeycomb body according to the invention is preferably initially produced everywhere from a ceramic material with little electrical conductivity, wherein the electrically more conductive partial region is then modified by adding electrically conductive material in its electrical properties.
  • ceramic material in particular extruded ceramic material
  • metallic material can be immersed, for example, by immersion in a melt or dissolved metal solution, thereby incorporating metallic material into the immersed areas of the honeycomb body. Steaming, sputtering or the frontal printing of metallic material is also possible.
  • the second portion is formed as a raised, outstanding on one of the end faces area.
  • the / all electrically conductive current paths can be formed as projecting from the front side raised parts or as raised current paths on an end face of the honeycomb body.
  • the second subarea is then z. B. provided with a relief-like structure in which the protruding mountains as structures form the electrically conductive current path, while the valleys or slots are used for electrical insulation.
  • either the electrical conductivity in the second partial region can be increased first and then the structure can be worked out or vice versa.
  • the present invention also relates to a method for producing a honeycomb body made of ceramic material with channels separated by walls and a front end side and a rear end side and a lateral surface, which is flowed through by a fluid in a flow direction from the front end side to the rear end side the honeycomb body is produced by extruding electrically poorly conductive ceramic material.
  • electrically poorly conductive material is here understood typical ceramic material, such as cordierite, which can be considered in practice as an electrical insulator.
  • an extruded honeycomb body is left untreated after extrusion in at least one first subarea, while in a second subarea it is treated in such a way that the electrical conductivity in this second subarea is increased, with the subareas lying one behind the other in the flow direction.
  • an increase in the electrical conductivity is understood to mean that the second subregion is to become electrically highly conductive, which means in particular that the conductivity of the walls in this subregion reaches values similar to those of honeycomb bodies produced from metal sheets or sintered metal.
  • This can preferably be achieved according to the invention by treating the second subarea by means of a dipping process, in particular by submerging this subarea in a melt or solution of a metal or a metal alloy.
  • the porosity present after extrusion leads to absorption of metal from a melt or solution, whereby the electrical conductivity can be significantly increased. It depends on the chosen method, whether the dipping process before and / or after a possible burning process of the extruded honeycomb body is more advantageous.
  • the honeycomb body is immersed in a dipping bath up to a predetermined height in order to determine the height, that is to say the axial extent of the second partial area, and to treat this partial area uniformly.
  • the duration of the immersion process, the temperature and / or the concentration of the immersion bath are chosen so that the desired electrical conductivity is established.
  • the height of the immersion or the axial extent of the second portion is in particular chosen to be significantly smaller than the total axial length of the honeycomb body and is for example a maximum of 30% or even only a maximum of 10% thereof.
  • the axial extent of the second portion may also be only a few millimeters [mm], such as a maximum of 20 mm, or even a maximum of 10 mm.
  • the electrical conductivity of the second portion of the honeycomb body may be increased by a vapor deposition method or a spraying method for applying an electrical material. It is particularly advantageous in this case if the method is carried out before firing an extruded ceramic honeycomb body, because then a uniform penetration of the applied metallic layer is achieved. If appropriate, the above method steps for adjusting the electrical conductivity in combination with each other (if necessary to different NEN points of manufacture and / or different materials) are used.
  • the method can be further developed such that the treatment of the second partial area is effected selectively by protecting predetermined separation areas of the honeycomb body by a mask or a protective application (or the like) prior to the treatment, in particular those separation areas which divide the second partial area into at least one electrically conductive one Divide the current path.
  • a homogeneous, electrically conductive second subarea may have an electric heater which is unsuitable for electrical heating, namely an electrical resistance which is too low.
  • the invention provides various possibilities for dividing the second subarea electrically by separating areas so that at least one current path, preferably a plurality of current paths with suitable electrical resistance results.
  • the separation areas are ensured according to an embodiment of the invention by preventing the increase of the electrical conductivity in these areas, which is achieved for example by a mask on an end face of the honeycomb body or by a protective order.
  • the honeycomb body is produced in one piece, preferably by means of extrusion,
  • the honeycomb body is preferably produced from segments of extruded material joined together,
  • the honeycomb body is preferably provided (only) with cordierite, so that a honeycomb body is produced with electrically poorly conductive ceramic material.
  • the portion of the honeycomb body, which is to form the second portion, is provided with a metal
  • a selective treatment is carried out, being protected by a mask or a protective order predetermined separation areas of the honeycomb body before the treatment.
  • step B (or the processes outlined therein) can take place before and / or after step C.
  • FIG. 2 shows a honeycomb body according to the invention with an electrically conductive subregion divided by slots
  • FIG. 3 shows schematically a honeycomb body as in FIG. 2 with an associated electrical circuit
  • FIG. 5 shows schematically an illustration of a dipping method according to the invention.
  • Fig. 1 shows the basic structure of an extruded ceramic honeycomb body 1 according to the invention with a front end face 2 and a rear end face 3, wherein the honeycomb body 1 has walls 10, which channels 11 forms. These channels 11 can be flowed through in the flow direction S by a fluid, in particular a gas.
  • the honeycomb body 1 has an axial length L in the flow direction S and a surrounding lateral surface 4 on the outside.
  • the honeycomb body is electrically poorly conductive, in particular electrically insulating for practical purposes.
  • the honeycomb body has a good electrical conductivity similar to that of metallic honeycomb bodies.
  • Fig. 1 shows the basic structure of an extruded ceramic honeycomb body 1 according to the invention with a front end face 2 and a rear end face 3, wherein the honeycomb body 1 has walls 10, which channels 11 forms. These channels 11 can be flowed through in the flow direction S by a fluid, in particular a gas.
  • the honeycomb body 1 has an axial length L in the flow direction S and a surrounding
  • FIG. 1 is also indicated that there may be not only an electrically good conductive portion, but several.
  • another second portion 7 is also formed electrically good conductive adjacent to the rear end side.
  • Fig. 2 illustrates how an electrically conductive second portion 6 of a honeycomb body 1 can be divided electrically by separation regions, in this case slots 8, in order to achieve a desired electrical resistance.
  • the method of subdividing an electrically conductive disk through slots is well known in the art, and the measures and advantages known from this prior art can also find application in the present invention.
  • the electrically highly conductive second subregion 6 has a height H that is less than a depth T of the slots 8.
  • the slits 8 should extend to an interface 9 within the first subregion 5 in order to prevent short circuits between the individual subregions 5. Individual parts of the slotted second portion 6 to avoid.
  • Fig. 3 illustrates how a honeycomb body according to the invention shown in FIG. 2 can be integrated into an electrical circuit.
  • the second subarea 6 is contacted on two sides by the lateral surface 4, namely with a first terminal contact 13 and a second terminal contact 14. Via electrical leads 15, these can be connected to an electrical current source 16, possibly via a Switch, to be connected.
  • a current path 12 is then formed, which in the present exemplary embodiment runs meandering around the slots 8 in the region of the end face 2.
  • the second portion 6 can take over the same tasks for electrical heating as known from the prior art disc-shaped electrically conductive honeycomb body, but is an integral part of a larger honeycomb body and thereby held mechanically stable.
  • FIG. 4 schematically shows an end view of a honeycomb body 1 according to the invention, in which a subdivision of the second subarea 6 into a plurality of current paths 20, 21, 22, 23, 24 has been made.
  • the separation areas 19 may be either electrically non-conductive areas or slots.
  • a relatively wide and short central current path 20 is provided, through which a relatively strong current can flow from the first terminal contact 13 to the second terminal contact 14, when they are subjected to a voltage.
  • honeycomb bodies through which fluids can flow the highest heat output in the center is often required, which is why this embodiment can be particularly useful.
  • Two decentralized current paths 21, 22 are made slightly longer and somewhat less wide, so that smaller partial currents flow through them, when the first terminal contact 13 and the second terminal contact 14 are subjected to a voltage. Even smaller currents flow in this case through the two lateral current paths 23, 24.
  • FIG. 4 is only one example of the many possibilities which the person skilled in the art can offer for the subdivision of the second subarea, in particular if he relies only to a small extent on the Stability of the resulting structures must pay attention, because this is practically always ensured by the first portion 5.
  • FIG. 5 diagrammatically illustrates the coating process of a honeycomb body 1 according to the invention. This is immersed so deeply in a dipping bath 18 in a container 17 that a first subregion 5 remains above the dipping bath 18, while a second subregion 6 remains up to a height H fills with liquid immersion 18 and this partially absorbs. After removal of the honeycomb body 1 from the dipping bath and optionally a further treatment, in particular firing, a honeycomb body according to the invention with two partial areas 5, 6 of different electrical conductivity is produced.
  • the preferred field of application of the invention is the exhaust gas purification of internal combustion engines, especially in motor vehicles.
  • Exhaust gas purification systems generally contain not only an electrically heatable disc, but more honeycomb body as a particle filter and / or as a catalytic converter with a catalytically active coating.
  • the present invention can therefore provide two components simultaneously, namely an electrically heatable disk and an integrally associated honeycomb body whose dimensions NEN, in particular its axial length is independent of the axial length of the heated disc selectable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Ceramic Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Catalysts (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Filtering Materials (AREA)

Abstract

La présente invention concerne un corps en nid d'abeilles (1) en matériau céramique qui comprend des canaux (11) séparés les uns des autres par des parois (10) et un côté frontal avant (2) et un côté frontal arrière (3) ainsi qu'une surface extérieure (4) et dans lequel peut circuler un fluide dans un sens d'écoulement (S) allant du côté frontal avant (2) au côté frontal arrière (3), le corps en nid d'abeilles (1) étant moins bon électroconducteur dans au moins une première région partielle (5) que dans au moins une deuxième région partielle (6), les régions partielles (5, 6) étant situées l'une derrière l'autre dans le sens d'écoulement (S). Pour fabriquer un tel corps en nid d'abeilles (1), on a recours à un procédé selon lequel un corps en nid d'abeilles (1) est fabriqué par extrusion de matériau céramique mauvais électroconducteur, le corps en nid d'abeilles (1) étant traité dans au moins une deuxième région partielle (6; 7), après l'extrusion, de manière que la conductibilité électrique soit augmentée dans cette deuxième région partielle (6; 7) tandis qu'elle reste inchangée dans au moins une première région partielle (5), les régions partielles (5, 6: 7) étant situées les unes derrière les autres dans le sens d'écoulement (S).
EP13774114.6A 2012-10-02 2013-10-01 Corps en nid d'abeilles extrudé à partir de matériau céramique, à chauffage électrique Withdrawn EP2904229A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012109391.1A DE102012109391A1 (de) 2012-10-02 2012-10-02 Elektrisch beheizbarer, aus keramischem Material extrudierter Wabenkörper
PCT/EP2013/070482 WO2014053511A1 (fr) 2012-10-02 2013-10-01 Corps en nid d'abeilles extrudé à partir de matériau céramique, à chauffage électrique

Publications (1)

Publication Number Publication Date
EP2904229A1 true EP2904229A1 (fr) 2015-08-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13774114.6A Withdrawn EP2904229A1 (fr) 2012-10-02 2013-10-01 Corps en nid d'abeilles extrudé à partir de matériau céramique, à chauffage électrique

Country Status (5)

Country Link
US (1) US20150267583A1 (fr)
EP (1) EP2904229A1 (fr)
JP (1) JP6339577B2 (fr)
DE (1) DE102012109391A1 (fr)
WO (1) WO2014053511A1 (fr)

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JP6815908B2 (ja) 2017-03-15 2021-01-20 日本碍子株式会社 ハニカム構造体
JP7030588B2 (ja) 2018-03-23 2022-03-07 日本碍子株式会社 ハニカム構造体
US11215096B2 (en) 2019-08-21 2022-01-04 Corning Incorporated Systems and methods for uniformly heating a honeycomb body
DE102019219150A1 (de) * 2019-12-09 2021-06-10 Vitesco Technologies GmbH Vorrichtung zur Abgasnachbehandlung und Verfahren zur Herstellung dieser
FR3110808B1 (fr) * 2020-05-20 2022-05-27 Faurecia Systemes Dechappement Dispositif de chauffage, dispositif de purification et ligne d’échappement incorporant un tel dispositif de chauffage
JP7422635B2 (ja) * 2020-09-23 2024-01-26 日本碍子株式会社 電気加熱式担体、排気ガス浄化装置及び電気加熱式担体の製造方法
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WO2014053511A1 (fr) 2014-04-10
DE102012109391A1 (de) 2014-04-03
JP2015535796A (ja) 2015-12-17
JP6339577B2 (ja) 2018-06-06
US20150267583A1 (en) 2015-09-24

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