WO2023046631A1 - Conducteur chauffant pour chauffer un écoulement de gaz d'échappement d'un moteur à combustion interne - Google Patents

Conducteur chauffant pour chauffer un écoulement de gaz d'échappement d'un moteur à combustion interne Download PDF

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Publication number
WO2023046631A1
WO2023046631A1 PCT/EP2022/075958 EP2022075958W WO2023046631A1 WO 2023046631 A1 WO2023046631 A1 WO 2023046631A1 EP 2022075958 W EP2022075958 W EP 2022075958W WO 2023046631 A1 WO2023046631 A1 WO 2023046631A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating conductor
heating
elements
conductor elements
structures
Prior art date
Application number
PCT/EP2022/075958
Other languages
German (de)
English (en)
Inventor
Rolf BRÜCK
Peter Hirth
Holger Stock
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
Publication of WO2023046631A1 publication Critical patent/WO2023046631A1/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
    • F01N3/18—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
    • F01N3/02—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
    • 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
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/18—Exhaust treating devices having provisions not otherwise provided for for improving rigidity, e.g. by wings, ribs

Definitions

  • the invention relates to a heating conductor for use in an exhaust line of an internal combustion engine, the heating conductor being formed in one piece or from a plurality of heating conductor elements which are electrically conductively connected to one another via connecting means, the heating conductor elements also being opposite a structure upstream or downstream in the axial direction or are supported against a radially outward structure.
  • Heating elements are used to heat up devices for exhaust gas aftertreatment more quickly, in particular in exhaust lines from internal combustion engines. These heat both the flowing exhaust gas and the adjacent structures, such as the honeycomb bodies that form the catalysts, or evaporation elements. Heating preferably takes place using the ohmic resistance, as a result of which an electric current is converted into heat in a conductive structure.
  • Various types of heating elements of this type are known in the prior art.
  • Heating conductors which are extruded from metal powder and a ceramic and then sintered. These heating conductors are arranged in the exhaust gas flow and connected to a voltage source.
  • heating conductors of this type Due to the extrusion and the subsequent sintering, there is a high degree of freedom with regard to the design of the heating conductors.
  • heating conductors of this type in particular with regard to the occurring mechanical Loads, especially vibrations, are not sufficiently stable over time.
  • the heat output achieved is not sufficient to meet the requirements for rapid heating of the exhaust gas in order to comply with the applicable legal limit values.
  • the object with regard to the heating conductor is solved by a heating conductor having the features of claim 1 .
  • One embodiment of the invention relates to a heating conductor for use in an exhaust line of an internal combustion engine, the heating conductor being formed in one piece or from a plurality of heating conductor elements which are electrically conductively connected to one another via connecting means, the heating conductor elements also being located upstream or downstream in the axial direction Structure or against a radially outward structure are supported.
  • the production of the heating conductor from a plurality of individually adapted heating conductor elements is advantageous in order to obtain a heating conductor which utilizes the available flow cross-section as optimally as possible.
  • it enables the construction of a heating conductor that is less sensitive to thermally induced expansions and undergoes less deformation.
  • the emergence of hotspots, i.e. so-called hot spots, is avoided and overall durability is improved.
  • the heat conductor elements or the heat conductor is compared to an upstream or downstream element in the flow direction of the exhaust gas, such as For example, a honeycomb body of a catalyst with appropriate elements, such as support pins supported.
  • the heating conductor can also be supported relative to the housing surrounding the heating conductor.
  • the heating conductor elements are produced by sintering, casting or 3D printing.
  • the preferably selected manufacturing methods allow the heating conductor or the heating conductor elements forming the heating conductor to be manufactured with a particularly high degree of freedom with regard to the geometric design.
  • heating conductor elements can be produced in a simple manner, which are particularly well adapted to the corresponding installation situation and the respective flow cross section.
  • the heating conductor elements are made from a material mix with ceramic components.
  • Ceramic materials with an admixture of metal particles are advantageous because they can be shaped in a simple manner and can be specifically adapted with regard to their electrically conductive property by the admixture proportion of the metal particles.
  • the heating conductor elements are produced from sheet metal by metalworking methods.
  • the heating conductor elements can be obtained by punching out metal sheets.
  • the heating conductor has a meandering structure and occupies a predefined area within a flow cross section.
  • a meandering structure of the heat conductor allows a very good utilization of the available flow cross-section to be achieved, as a result of which an optimal heat output can be achieved.
  • the heating conductor has a central inner pole, from which spoke-shaped heating conductor elements extend in a straight or curved form towards the radially outer housing.
  • the inner pole can be formed, for example, by a circular heating conductor element from which corresponding spokes protrude.
  • an optimal shape of the heat conductor can be used with regard to the resulting pressure loss and the desired heating properties.
  • the heating conductor elements are suspended in a resilient manner and a relative movement in the axial and/or in the radial direction is made possible.
  • the heating conductor elements themselves can also be designed in such a way that they have a certain flexibility in the radial and/or axial direction. This is particularly advantageous in order to absorb the vibrations that occur during operation of an internal combustion engine and can affect the exhaust line.
  • the heating conductor elements are connected to one another or to adjacent structures by means of support structures, with the support structures being electrically insulating.
  • Support structures can be bars, for example, which lead from one heating conductor element to the other.
  • the support structures can be electrically insulating or electrically conductive.
  • a defined current path can be created with an insulating support structure by limiting the current flow from one heating element to the next. Likewise, the current path can be routed from one heating conductor element to the next heating conductor element in a targeted manner by means of an electrically conductive support structure.
  • the heating conductor elements and/or the support structures have openings which serve to connect them to one another or to adjacent structures.
  • the openings are preferably made in the heating conductor elements during the production process thereof, so that a simple connection can then be established.
  • heating conductor elements and/or the supporting structures are connected to one another or to adjacent structures by means of form-fitting and/or force-fitting connections.
  • form-fitting and/or force-fitting connections are expedient if the heating conductor elements and/or the supporting structures are connected to one another or to adjacent structures by means of form-fitting and/or force-fitting connections.
  • Snap-in connections or hooking are expedient if the heating conductor elements and/or the supporting structures are connected to one another or to adjacent structures by means of form-fitting and/or force-fitting connections.
  • Snap-in connections or hooking to preference, since these can also be made in the simplest way and produce a durable connection.
  • FIG. 1 is a plan view of a heating conductor, with the heating elements protruding like spokes from the edge of the housing into the flow cross-section,
  • FIG. 2 shows a plan view of a heating conductor, showing a central inner pole from which several heating conductor elements protrude in a spoke-like manner towards the housing lying radially on the outside, and
  • FIG 3 shows a plan view of a plurality of heating conductor elements which are arranged in a flow cross-section and are connected to one another, to axially upstream or downstream structures or to the housing by means of support elements.
  • FIG. 1 shows a heating conductor 1 which is formed from a plurality of heating conductor elements 2 .
  • the heat conductor elements 2 are arc-shaped and protrude from the housing 4 radially delimiting the flow cross section 3 into the flow cross section.
  • the heating elements can be ordered here support means, not shown, can be connected to one another in an electrically conductive manner, so that they form a common heating conductor.
  • the heat conductor elements 2 can be supported in relation to structures upstream and/or downstream in the direction of flow, such as in particular honeycomb bodies.
  • FIG. 2 shows an arrangement of a plurality of heating conductor elements 5, which run from a centrally arranged inner pole 6 in an arc as spokes to the housing 7.
  • the heating conductor elements 5 can be electrically conductively connected to the housing 7 and the inner pole.
  • the exemplary embodiment in FIG. 2 provides four heating conductor elements 5 . In alternative configurations, more heating conductor elements can also be provided, so that the flow cross section is filled more densely and the heating output is improved overall.
  • FIG. 3 shows a number of heating conductor elements 8 which are in the form of rods. Four heating conductor elements are shown as an example in FIG. However, a different number is also possible.
  • the heating conductor elements 8 are supported with support structures 9 relative to the housing 10 or upstream or downstream support structures.
  • the support structures 9 can also be used to connect the heating conductor elements to one another.
  • FIGS. 1 to 3 are not restrictive and serve to clarify the idea of the invention.

Landscapes

  • 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)
  • Resistance Heating (AREA)

Abstract

La présente invention concerne un conducteur chauffant (1) destiné à être utilisé dans une section de gaz d'échappement d'un moteur à combustion interne, le conducteur chauffant (1) étant formé d'une seule pièce ou à partir d'une pluralité d'éléments conducteurs chauffants (2, 5, 8) raccordés de manière électroconductrice par l'intermédiaire de moyens de raccordement, les éléments conducteurs chauffants (2, 5, 8) étant également supportés par rapport à une structure située en amont ou en aval dans la direction axiale ou par rapport à une structure située à l'extérieur dans la direction radiale.
PCT/EP2022/075958 2021-09-27 2022-09-19 Conducteur chauffant pour chauffer un écoulement de gaz d'échappement d'un moteur à combustion interne WO2023046631A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021210761.3A DE102021210761A1 (de) 2021-09-27 2021-09-27 Heizleiter zur Aufheizung eines Abgasstroms einer Verbrennungskraftmaschine
DE102021210761.3 2021-09-27

Publications (1)

Publication Number Publication Date
WO2023046631A1 true WO2023046631A1 (fr) 2023-03-30

Family

ID=83457339

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/075958 WO2023046631A1 (fr) 2021-09-27 2022-09-19 Conducteur chauffant pour chauffer un écoulement de gaz d'échappement d'un moteur à combustion interne

Country Status (2)

Country Link
DE (1) DE102021210761A1 (fr)
WO (1) WO2023046631A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2947288A1 (fr) * 2014-05-23 2015-11-25 Toyota Jidosha Kabushiki Kaisha Dispositif de chauffage électrique et système de purification d'échappement pour un moteur à combustion interne
DE102018221558A1 (de) * 2017-12-15 2019-06-19 Ngk Insulators, Ltd. Wabenstruktur
DE202020104976U1 (de) * 2020-08-28 2020-10-06 Hjs Emission Technology Gmbh & Co. Kg Elektrisches Heizaggregat zum Einschalten in den Abgasstrang einer Brennkraftmaschine sowie damit ausgerüstetes Abgasreinigungsaggregat
WO2020234180A1 (fr) * 2019-05-17 2020-11-26 Faurecia Systemes D'echappement Dispositif de purification des gaz d'échappement d'un véhicule, procédé de fabrication, ligne d'échappement et véhicule correspondants
US20210123369A1 (en) * 2019-10-28 2021-04-29 Faurecia Systemes D'echappement Exhaust gas heating device, associated exhaust line and vehicle
DE102019131556A1 (de) * 2019-11-22 2021-05-27 Eberspächer Exhaust Technology GmbH Abgasheizer
WO2021115950A1 (fr) * 2019-12-09 2021-06-17 Vitesco Technologies GmbH Appareil de post-traitement de gaz d'échappement ayant un disque chauffé annulaire
DE202021102620U1 (de) * 2020-11-30 2021-07-23 Faurecia Emissions Control Technologies, Germany Gmbh Heizvorrichtung für ein Abgassystem und Abgassystem

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013126575A1 (fr) 2012-02-22 2013-08-29 Watlow Electric Manufacturing Company Régénération passive et active assistée par un chauffage électrique pour systèmes antipollution de moteurs diesel
WO2014176585A1 (fr) 2013-04-26 2014-10-30 Watlow Electric Manufacturing Company Système de chauffage intelligent
WO2017151966A1 (fr) 2016-03-02 2017-09-08 Watlow Electric Manufacturing Company Système et procédé de zonage axial d'énergie de chauffage

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2947288A1 (fr) * 2014-05-23 2015-11-25 Toyota Jidosha Kabushiki Kaisha Dispositif de chauffage électrique et système de purification d'échappement pour un moteur à combustion interne
DE102018221558A1 (de) * 2017-12-15 2019-06-19 Ngk Insulators, Ltd. Wabenstruktur
WO2020234180A1 (fr) * 2019-05-17 2020-11-26 Faurecia Systemes D'echappement Dispositif de purification des gaz d'échappement d'un véhicule, procédé de fabrication, ligne d'échappement et véhicule correspondants
US20210123369A1 (en) * 2019-10-28 2021-04-29 Faurecia Systemes D'echappement Exhaust gas heating device, associated exhaust line and vehicle
DE102019131556A1 (de) * 2019-11-22 2021-05-27 Eberspächer Exhaust Technology GmbH Abgasheizer
WO2021115950A1 (fr) * 2019-12-09 2021-06-17 Vitesco Technologies GmbH Appareil de post-traitement de gaz d'échappement ayant un disque chauffé annulaire
DE202020104976U1 (de) * 2020-08-28 2020-10-06 Hjs Emission Technology Gmbh & Co. Kg Elektrisches Heizaggregat zum Einschalten in den Abgasstrang einer Brennkraftmaschine sowie damit ausgerüstetes Abgasreinigungsaggregat
DE202021102620U1 (de) * 2020-11-30 2021-07-23 Faurecia Emissions Control Technologies, Germany Gmbh Heizvorrichtung für ein Abgassystem und Abgassystem

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