WO2022243381A1 - Dispositif de chauffage d'un flux de gaz d'échappement - Google Patents

Dispositif de chauffage d'un flux de gaz d'échappement Download PDF

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Publication number
WO2022243381A1
WO2022243381A1 PCT/EP2022/063455 EP2022063455W WO2022243381A1 WO 2022243381 A1 WO2022243381 A1 WO 2022243381A1 EP 2022063455 W EP2022063455 W EP 2022063455W WO 2022243381 A1 WO2022243381 A1 WO 2022243381A1
Authority
WO
WIPO (PCT)
Prior art keywords
honeycomb body
frame element
frame
housing
exhaust gas
Prior art date
Application number
PCT/EP2022/063455
Other languages
German (de)
English (en)
Inventor
Rolf BRÜCK
Jan Hodgson
Peter Hirth
Original Assignee
Vitesco Technologies 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 Vitesco Technologies GmbH filed Critical Vitesco Technologies GmbH
Priority to EP22731079.4A priority Critical patent/EP4370787A1/fr
Publication of WO2022243381A1 publication Critical patent/WO2022243381A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/16—Selection of particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1872—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • 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
    • F01N3/18—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
    • 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
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater

Definitions

  • the invention relates to a device for heating an exhaust gas flow from an exhaust gas source, having a honeycomb body through which gas can flow in a main direction of flow, which honeycomb body is produced from a plurality of metallic foils by stacking them on top of one another and winding them up, the honeycomb body having at least one electrical conduction path which can be electrically contacted by means of at least one electrical contact .
  • Different catalysts are used for exhaust aftertreatment. Depending on the application, these are formed, for example, by ceramic substrates that are coated with different coatings that chemically react with individual components of the exhaust gas and produce harmless substances from it. Alternatively, metallic honeycomb bodies are known.
  • the electrically heatable honeycomb bodies must be positioned in a fixed position in the exhaust line and, on the other hand, they must be electrically insulated from other electrically conductive components.
  • a disadvantage of the devices in the prior art is therefore the need for an additional support catalyst for positioning the heated catalyst formed by the electrically heatable honeycomb body.
  • One exemplary embodiment of the invention relates to a device for heating an exhaust gas flow from an exhaust gas source, with a honeycomb body through which flow can take place in a main flow direction, which honeycomb body is produced from a plurality of metallic foils by stacking them on top of one another and winding them up, the honeycomb body having at least one electrical conduction path which is connected by means of at least one electrical Contacting can be electrically contacted, the device having at least one first frame element which is upstream or downstream of the honeycomb body along the main flow direction, the honeycomb body being connected to the first frame element by means of a plurality of support pins, the honeycomb body being arranged within an annular housing is.
  • honeycomb bodies for exhaust gas aftertreatment are known in the prior art.
  • Metallic honeycomb bodies in particular, are regularly produced from a stack of layers, which is formed from smooth or microstructured metal foils and corrugated metal foils.
  • Flow channels are formed between the individual metal foils, through which flow can take place from an inflow side to an outflow side.
  • the inflow side and the outflow side are formed here by the end faces of the honeycomb body.
  • the main direction of flow through the honeycomb body is defined by the flow channels or their alignment.
  • the layer stack is created by alternately stacking the metal foils on top of each other.
  • the stack of layers is then wound up around one or more so-called winding mandrels, resulting in a honeycomb body having the shape of a disk.
  • the honeycomb body is designed in such a way that current can flow from one end area of the honeycomb body to another end area, which is preferably opposite the first end area. This is done along a conduction path. This preferably runs from an electrical contact at one end of the stack of layers through the stack of layers to the other end of the stack of layers. Im coiled In the state of the honeycomb body, the conduction path runs regularly in the circumferential direction of the honeycomb body in the form of a spiral, with the individual sections of the layer stack being spaced apart from one another by a spiral air gap.
  • the electrically heatable honeycomb body is attached by means of support elements to another honeycomb body, such as a catalytic converter for exhaust gas aftertreatment.
  • the electrically heatable honeycomb body can therefore not be used alone without the use of a further honeycomb body serving as a support catalyst.
  • the device according to the invention has at least one first frame element, which is upstream or downstream of the honeycomb body along the main flow direction.
  • the honeycomb body is fastened to the frame element by means of support pins which electrically insulate the honeycomb body from the frame.
  • the frame element is spaced apart from the honeycomb body along the main flow direction and is not in electrically conductive contact with the honeycomb body at any point.
  • the frame element serves to connect the honeycomb body to a housing section of an exhaust pipe.
  • the exhaust line is formed by a circular tube.
  • the frame member can be contacted and bonded to the inner surface of the exhaust pipe so as to fix the honeycomb body in the exhaust pipe.
  • the exhaust pipe can also have cross sections that deviate from a circular cross section.
  • the frame element is then preferably adapted to the respective internal cross section of the exhaust pipe.
  • the honeycomb body can nevertheless have a circular cross section.
  • the honeycomb body can be connected via a second electrical contact to the respective pole of a voltage source or simply be electrically conductively connected to the housing of the exhaust pipe, provided that this acts as the second pole. In the case of high voltages in particular, however, this should be avoided in order to avoid dangerous repercussions, such as electric shocks, and to avoid endangering people or animals.
  • the frame element is preferably designed in such a way that it has sufficient strength to permanently position the honeycomb body in the exhaust pipe and also in such a way that the impairment of the flow through the honeycomb body is as minimal as possible and the back pressure created by the frame element is as low as possible.
  • first frame element is arranged in front of the honeycomb body along the main flow direction and a second frame element is arranged downstream along the main flow direction, the first frame element and the second frame element being connected to the honeycomb body by means of a plurality of support pins.
  • Each of the frame elements is connected to the honeycomb body via a plurality of support pins, the support pins on the one hand producing a mechanically durable connection and at the same time producing electrical insulation of the honeycomb body from the frame elements.
  • first frame element and/or the second frame element have a larger diameter than the honeycomb body.
  • the larger diameter of the frame elements compared to the honeycomb body is particularly useful in order to prevent direct physical contact of the honeycomb body with the housing of the exhaust pipe. Because the frame elements are the only components that are decisive for the connection of the honeycomb body to the housing of the exhaust pipe, the frame elements can be adapted to the respective cross section in a simple and cost-effective manner Exhaust pipes and housing can be adjusted while the honeycomb body can remain unchanged.
  • a preferred exemplary embodiment is characterized in that the honeycomb body is electrically insulated from the first frame element and/or the second frame element by means of the support pins.
  • Support pins are used on the one hand to mechanically fasten the honeycomb body to a fixed structure, in this case the frame elements, and on the other hand to electrically insulate the honeycomb body.
  • Support pins are known in a variety of ways in the prior art and regularly have a metal core which is partially or completely surrounded by an electrically insulating ceramic.
  • metallic coatings can be applied to the insulating ceramic or metal sleeves can be inserted.
  • the support pins can be cohesively connected to the honeycomb body and/or the heating conductor, for example by a soldering process, such as high-temperature soldering in particular.
  • a soldering process such as high-temperature soldering in particular.
  • butt soldering can be used as the connection method, or the support pins can be welded to the frame elements.
  • first frame element and the second frame element are not identical and have design properties that differ from one another.
  • the upstream and the downstream frame element can each have a different structure.
  • the frame elements can fulfill different tasks. It is conceivable, for example, to design one of the frame elements to ensure the greatest possible insensitivity to so-called thermal shock events. Thermal shock events are, for example, sudden warming up after a cold start, or cooling down after operation in a very cold environment. The activation or deactivation of the heating function can also be such events. In order to withstand strong temperature fluctuations can, special materials can be selected, or at least from sections different strengths of the frame element who generated the, for example, by different material thicknesses, types of connection, or different materials.
  • the frame element can have areas of greater flexibility and areas of lower flexibility, in particular to keep vibrations away from the areas of the frame element that receive the support pins.
  • At least one of the frame elements is made from a plurality of sheet metal layers which are at least partially welded to one another.
  • the frame element is particularly preferably constructed in the manner of a leaf spring, so that a plurality of material layers are only connected to one another in sections, so that a relative movement of the individual layers to one another is possible. This gives the frame element a certain flexibility, which is particularly advantageous in terms of durability.
  • the frame element thus forms a type of vibration damper, as a result of which the force applied to the heated honeycomb body can be reduced.
  • one of the frame elements has at least two areas with different material properties.
  • the frame members can be formed to have different properties across their cross section. A particularly stiff design is conceivable at the connection points to the exhaust pipe and at the receiving points of the support pins and a rather soft design in the areas in between. This leads to a certain decoupling of the honeycomb body from the vibrations from the gas line.
  • Other material properties such as in particular strength, thermal conductivity and flexibility, can also vary in sections. It is also expedient if one of the frame elements has an annular section at its radially outer end region, with individual spokes running from this annular section to a central section.
  • the frame element can be connected to the pipeline particularly easily via the ring-shaped section. Different shapes, for example oval cross sections, can also be provided.
  • the ring-shaped section thus forms the anchor point for the frame element on the pipeline or a housing.
  • honeycomb body extends over a large part of the flow cross section of the pipeline and the honeycomb body has to be supported at several points relative to the frame element, spokes which protrude from the ring-shaped section are particularly advantageous in order to also create a possibility in the center of the honeycomb body Support honeycomb body by means of support pins relative to the frame member.
  • the frame element has a further ring-shaped element, particularly in the area of the center of the honeycomb body, which serves to accommodate support pins.
  • the spokes and/or the annular sections particularly preferably follow the course of the stack of layers of the honeycomb body, so that as little flow cross section as possible is covered by the frame element and at the same time a straight connection of the honeycomb body to the frame element is made possible by means of the support pins.
  • the frame elements are aligned with one another at least in sections along the main flow direction.
  • the frame elements are preferably completely aligned with one another, so that the flow resistance generated by the frame elements is as low as possible.
  • a flow-conducting property of the frame elements is also conceivable, for example in order to selectively hit individual areas of the honeycomb body with exhaust gas.
  • the support pins can be designed in such a way that they extend on one side from the honeycomb body towards one of the frame elements and are connected to it.
  • the flow element upstream in the main flow direction is thus connected to the honeycomb body via different support pins than the frame element downstream in the main flow direction. In this way, a different number of connection points can be generated on the two frame elements.
  • different support pins can be used for the two frame elements, for example with a different insulation effect, a different choice of material or a different length or thickness.
  • the support pins can be designed in such a way that the support pins run from the first frame element through the honeycomb body to the second frame element.
  • the support pins penetrate the honeycomb body in each case along a flow channel formed by the honeycomb body.
  • the support pins can each be connected to one of the frame elements on both sides, or only connected to one of the frame elements. It can also be provided that some of the support pins are connected to both frame elements and some of the support pins are connected to only one frame element.
  • the number of support pins in the winding center of the honeycomb may be higher than in the radially outer area of the honeycomb.
  • the reason for this is that a large part of the mass of the honeycomb body lies in the center of the winding.
  • the number of support pins can be increased in places where particularly high stability is required.
  • the support pins are preferably connected to the honeycomb body and/or the frame elements by means of a material bond, for example by welding or soldering, such as in particular high-temperature soldering. It is also expedient if the honeycomb body and/or the frame elements are arranged within an annular housing.
  • the annular housing extends at least from the first frame element in the axial direction beyond the honeycomb body. If a second frame element is provided, this is also arranged within the annular housing.
  • a further exemplary embodiment of the invention relates to an exhaust gas aftertreatment device with at least one device as described above, the exhaust gas aftertreatment device having a tubular housing, the device being inserted into the housing, the first frame element and/or the second frame element being integrally bonded and/or form-fitting to the housing are connected.
  • the tubular housing forms the receptacle for the device according to the invention Vorrich.
  • the tubular housing preferably has only a short axial extension of a few centimeters. More preferably, the axial extent is about 2 centimeters.
  • Required electrical feedthroughs can be routed through the tubular housing and the honeycomb body can be contacted in this way. By connecting it to a tubular housing, the device becomes modular and can be integrated particularly easily into existing exhaust gas lines.
  • the exhaust pipe of an internal combustion engine can be connected to the tubular housing by means of a connecting element, such as pipe clamps.
  • a connecting element such as pipe clamps.
  • a material connection between the tubular housing and other sections of an exhaust pipe is also possible.
  • the cross sections of the tubular housing and the exhaust gas line can deviate from one another in such a way that the components can be partially inserted into one another.
  • the components can be welded together, in particular the frame elements being welded to the tubular housing.
  • the tubular housing can have a shoulder on the inner wall which serves as a stop for one of the frame elements.
  • the heel can be formed by a bead molded from the outside, for example.
  • the honeycomb body can be contacted electrically by means of at least one electrical feedthrough which is routed through the housing.
  • the housing generally forms the second pole, so that the honeycomb body is electrically conductively connected to the housing at one of its ends, preferably the end adjacent to the inner wall of the housing.
  • contact is made with the honeycomb body at each end by means of an electrical feedthrough, so that a current flow is ensured along the conduction path.
  • Fig. 1 is a view of a honeycomb body with an upstream frame element and two electrical feedthroughs
  • FIG. 2 is a detailed view showing two frame elements with a honeycomb body arranged in between,
  • FIG. 3 shows a perspective view of two frame elements which are arranged in a tubular housing
  • Fig. 4 is a sectional view through a support pin, the one side with a
  • 5 shows a sectional view through a honeycomb body and a support pin penetrating the honeycomb body, the support pin being connected to a frame element on both sides, and
  • Fig. 6 is a sectional view through an alternative support pin, which has an additional insulating layer in the axial direction compared to the frame elements.
  • FIG. 1 shows a honeycomb body 1, which is formed by a wound stack of layers of smooth and corrugated metal foils.
  • the honeycomb body 1 is arranged behind a frame element 2 and is connected to the frame element 2 by means of a multiplicity of support pins 3 .
  • the honeycomb body 1 is connected at each end to an electrical bushing 4 .
  • the electrical bushings 4 are guided through a housing, which cannot be seen in FIG. 1, and are fixed in this housing.
  • the electrical bushings 4 are used to supply an electrical conductor, the electrical conductor being electrically insulated from the housing and the housing being sealed gas-tight by the electrical bushings 4's.
  • the frame element 2 has an annular portion 5 at its outer radius and there projecting spokes 6, which are bent like a shovel.
  • the spokes 6 end in the center of the frame element in a second ring-shaped section 7.
  • a white terer web 8 is arranged, which covers the space spanned by the second ring-shaped section 7.
  • the diameter of the frame element 2 is larger than the diameter of the honeycomb body 1 . This ensures that when connecting the frame element 2 with a housing of an exhaust pipe, the honeycomb body remains at a distance from the inner wall of the exhaust pipe and comes into contact with the exhaust pipe at most with an end region of the layer stack.
  • FIG. 2 shows a sectional view through a support pin 10 which has a metal core 11 .
  • the core 11 is covered with electrical insulation 13, preferably an oxide ceramic. Furthermore, the core 11 is connected to the two frame elements 15, 16.
  • FIG. 3 shows a perspective view of two frame elements 20, 21. No honeycomb body is shown between the two frame elements 20, 21 in FIG.
  • the frame members 20, 21 are inserted into a tubular housing 22.
  • FIG. 3 For easier positioning, positioning means, such as corresponding projections and depressions, can be provided on the housing 22 and the frame elements 20, 21.
  • the electrical bushings are also routed through the housing 22 in the final assembled state.
  • FIG. 4 shows a support pin 30 which is connected to a frame element 31 on one side.
  • the support pin 30 also has a metallic core 32, an electrically insulating layer 33 and a metallic coating 34 for bonding to the honeycomb body.
  • the support pin 30 is materially bonded to the frame element 31 on the outside, ie the side facing away from the honeycomb body.
  • FIG. 5 shows a support pin 43 which is connected at the end to frame elements 41, 42 and to the honeycomb body 40.
  • the structure of the support pin 43 corresponds to that of the support pins previously shown.
  • the support pin 43 is on the inside with the frame elements 41, 42 connected, ie on the side facing the honeycomb body 40 . More specifically, the solder paste for soldering the support pin 43 to the frame members 41, 42 is coated on the inside.
  • FIG. 6 shows a support pin 50 with a slightly different construction.
  • the Me tallkern 51 is surrounded by an electrically insulating layer in the area 55, which is surrounded by a metal sleeve 52, which serves to accommodate the honeycomb body, not shown, but also in the areas 53, which face the frame elements, not shown.
  • These areas 53 can be formed, for example, by washers made of oxide ceramic.
  • a metallic layer 54 which can be formed by a metallic washer, for example.
  • a support pin of this type exhibits an increased insulating effect, since a separate insulating layer is also provided in the direction of the frame elements.
  • FIGS. 1 to 6 The exemplary embodiments of FIGS. 1 to 6 in particular have no restrictive character and serve to illustrate the inventive concept.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un dispositif pour chauffer un flux de gaz d'échappement d'une source de gaz d'échappement, avec un corps en nid d'abeille (1, 12, 40) qui peut être traversé le long d'une direction d'écoulement principale et qui est fabriqué par une pluralité de feuilles métalliques empilées les unes sur les autres et enroulées ensemble, le corps en nid d'abeille (1, 12, 40) présentant au moins une voie de conduction électrique, qui peut être mise en contact électrique au moyen d'au moins une mise en contact électrique, le dispositif présentant au moins un premier élément de cadre (2, 15, 16, 20, 21, 41, 42), qui est disposé en amont ou en aval du corps en nid d'abeilles (1, 12, 40) le long de la direction de flux principale, le corps en nid d'abeilles (1, 12, 40) étant relié au premier élément de cadre (2, 15, 16, 20, 21, 41, 42) au moyen d'une pluralité de broches de support (3, 10, 30, 43, 50).
PCT/EP2022/063455 2021-05-20 2022-05-18 Dispositif de chauffage d'un flux de gaz d'échappement WO2022243381A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22731079.4A EP4370787A1 (fr) 2021-05-20 2022-05-18 Dispositif de chauffage d'un flux de gaz d'échappement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021205198.7A DE102021205198A1 (de) 2021-05-20 2021-05-20 Vorrichtung zur Erwärmung eines Abgasstroms
DE102021205198.7 2021-05-20

Publications (1)

Publication Number Publication Date
WO2022243381A1 true WO2022243381A1 (fr) 2022-11-24

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PCT/EP2022/063455 WO2022243381A1 (fr) 2021-05-20 2022-05-18 Dispositif de chauffage d'un flux de gaz d'échappement

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EP (1) EP4370787A1 (fr)
DE (1) DE102021205198A1 (fr)
WO (1) WO2022243381A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
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EP4379198A1 (fr) * 2022-12-02 2024-06-05 Purem GmbH Unité de support pour supporter un conducteur de chauffage d'un dispositif de chauffage de gaz d'échappement sur une structure de support

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WO2024105179A1 (fr) * 2022-11-17 2024-05-23 Vitesco Technologies GmbH Structure de support pour une matrice chauffante
EP4379198A1 (fr) * 2022-12-02 2024-06-05 Purem GmbH Unité de support pour supporter un conducteur de chauffage d'un dispositif de chauffage de gaz d'échappement sur une structure de support

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