EP1065446B2 - Barre chauffante en céramique, bougie à incandescence la comprenant et procédé de production - Google Patents

Barre chauffante en céramique, bougie à incandescence la comprenant et procédé de production Download PDF

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Publication number
EP1065446B2
EP1065446B2 EP00111705A EP00111705A EP1065446B2 EP 1065446 B2 EP1065446 B2 EP 1065446B2 EP 00111705 A EP00111705 A EP 00111705A EP 00111705 A EP00111705 A EP 00111705A EP 1065446 B2 EP1065446 B2 EP 1065446B2
Authority
EP
European Patent Office
Prior art keywords
heating
heating rod
heating element
heating member
glow plug
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.)
Expired - Lifetime
Application number
EP00111705A
Other languages
German (de)
English (en)
Other versions
EP1065446A2 (fr
EP1065446B1 (fr
EP1065446A3 (fr
Inventor
Helmut Müller
Jens Hillius
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.)
BorgWarner Ludwigsburg GmbH
Original Assignee
Beru AG
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
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Application filed by Beru AG filed Critical Beru AG
Publication of EP1065446A2 publication Critical patent/EP1065446A2/fr
Publication of EP1065446A3 publication Critical patent/EP1065446A3/fr
Publication of EP1065446B1 publication Critical patent/EP1065446B1/fr
Application granted granted Critical
Publication of EP1065446B2 publication Critical patent/EP1065446B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines
    • F23Q2007/004—Manufacturing or assembling methods

Definitions

  • the invention relates to a heating element with a heating element made of electrically conductive ceramic material, a glow plug of a glow plug body and an incorporated heating element and a method for producing a heating element.
  • a heating element according to the preamble of claim 1 is known from DE-A-3 924 777 known.
  • a heating conductor which consists of a substantially flat or pin-shaped conductor, which is arranged between two insulating half-cylinders.
  • the conductor is completely surrounded by the insulating ceramic mass, which is a poor conductor of heat, with the exception of the connection area, so that in the heating area, the heating time of the heating element is extended due to the poor thermal conductivity of the ceramic material.
  • a heating rod with a heating element of electrically conductive ceramic material is also made of DE 4 117 253 A1 known.
  • the heating portion is cantilevered at the tip of a hollow holder outwardly supported in a glow plug body, wherein an insulating layer is inserted between the front end portion of the holder of the ceramic heater corresponding conductor sections and firmly fitted there.
  • the conductor sections and the insulation layer are connected via a braze filler metal, which consists of a Cu-Al-Ti alloy.
  • the object of the invention is to provide a heating element with a heating element made of electrically conductive ceramic material and a rod glow plug with such a heating element, wherein simple production process of the heating element to enable mass production, while maintaining high functionality and dimensional accuracy and compact design of heating element or Stick candle should be achievable.
  • the rod glow plug according to the invention is the subject of patent claim 6.
  • the inventive method for producing a heating element is designed as indicated in claim 7.
  • FIG. 1 has a heating rod, as provided for a glow plug, a per se usual, corresponding outer shape. It has a heating element 1a, which is in the form of a U-shaped component (see FIGS. 5a and 5b ) or as a sleeve-shaped component (see FIG. 6 ) is trained; this heating element 1a has in the heating area 11 a U-shaped bent area (see Figures 5a / 5b ) or a hemispherical shell-shaped region with integrally adjoining regions 11a and 11b which are rod-shaped (see FIG Figures 5a / 5b ) or sleeve-shaped (see FIG. 6 ) are formed and also consist of the same conductive ceramic material 2.
  • a heating element 1a which is in the form of a U-shaped component (see FIGS. 5a and 5b ) or as a sleeve-shaped component (see FIG. 6 ) is trained; this heating element 1a has in the heating area 11 a U-shaped bent
  • the heating element 1a is covered on all sides by insulating ceramic material 3 and intimately connected to it, preferably without any further intermediate layer; the insulating ceramic compound 3 forms the heating element body 1b, in which the heating element 1a is embedded.
  • the supply lines 11a / 11b emerge from the heating element body 1b and form the contact surfaces 9.
  • a region of the lines 11a or 11b can also be formed as a support base for an electronic component 8.
  • This electronic component 8 can serve for purposes of diagnosis, sensor or control of the heating element 1a.
  • the sealing surface 10 is designed for sealing fitting in the non-illustrated rod glow plug body.
  • the production of the heating element 1a is carried out by injection molding, in which a corresponding shape is filled with the conductive ceramic 2. Subsequently, the ejected part 1a is encapsulated with insulating ceramic 3. These Work steps are carried out in one unit by multi-component injection molding in two successive steps.
  • the conductive ceramic composition consists, for example, of a sialon powder which is mixed with thermosetting resin or thermoplastic synthetic material to form a syringe-shaped mass.
  • the molded part produced from 2 components is subsequently freed from the fillers required for the spraying process by heat treatment and thus becomes a compact ceramic raw part, which can be further processed mechanically, for example by grinding, before the final firing.
  • the heating area 11 can be positioned in the tip of the heating bar in a targeted manner; In the connection area, however, the cross section is increased in order to provide the lowest possible heating power there.
  • FIG. 2 the Schustab tip area of the heating element is shown schematically.
  • the heating region 11 is kept free in the outwardly facing region of the heating element 1a of insulating ceramic 3, so that the conductive ceramic material 2 is exposed; this is particularly advantageous when the heating element is used for ionization measurement.
  • the heating behavior can be improved by this measure, since the lapsed insulating ceramic 3 does not have to be heated in this area. It is particularly advantageous if the conductive ceramic 2 is exposed to the surface only on the heating rod tip, because additional insulation, for example with glaze in the installation area, is therefore no longer necessary.
  • FIG. 3 shows a heating element as part of a single-pole rod glow plug, wherein the heating element 1a is exposed in the heating area 11 on the surface of the heating element.
  • the heating element 1a is designed such that the Glühstromzuschreib done in the Schustabspitze via a central supply line with a relatively large cross-section; from the Schustabspitze it is passed over the heating area 11 on the outer surface of the glow plug body 6, which thus serves as a ground terminal.
  • the heating area may cover the entire surface or be divided into one or more segments, which are interrupted by insulating ceramic 3.
  • the electrical connection of the heating element 1a for example, by a pressure contact via a connector 4 to lead to the outside.
  • the ground terminal is designed so that the conductive ceramic is at least partially exposed at the sealing surface 10 and thereby the electrical connection to the metallic body 6 is made, through which the heating element 1a contacted to ground, so that a single-pole design of such a candle, which may be formed as a glow plug for a diesel engine or for a heater results.
  • a glow plug is schematic in FIG. 4 played.
  • the heating element 1a is in this case also surrounded in the installation area in the body 6 with insulating ceramic 3, so that a contact with the body 6 is excluded.
  • the terminal regions 5 and 7 are connected to an electronic component 8, wherein a part of the heating element 1a at the same time serves as a carrier for the electronic component 8. With this electronic component 8, the heating element 1a can be controlled, clocked or switched between annealing and measuring operation. If the glow plug is used via the electronic component 8 for ionization measurement, the heating element, such as in FIG. 2 described, designed such that at least in a partial region, the conductive ceramic layer 2 is exposed at a suitable location for the measurement.
  • FIG. 5a is the schematic side view of a heating element 1a, reproduced.
  • This component is produced in a first manufacturing step by injection molding and is formed with an extension of the leg 11b as a carrier 7 for an electronic component 8.
  • This element is in the subsequent manufacturing stage 2 according to FIG. 5b with an insulating ceramic 3 to the final shape to form the Schustab stressess 1b finished encapsulated so that heating element 1a is embedded in the Schustab stresses 1b.
  • This second manufacturing stage is performed by a second injection unit in the same tool after the corresponding tool slides are pulled and the mold cavity is released for the second manufacturing stage.
  • the product After encapsulation, the product is removed by tempering of the fillers; by the final firing the ceramic components 1 and 2 are sintered together to form a solid unitary component. If necessary, the surface of the heating rod can be reworked, for example, at the Abdichtschulter by grinding or glazing.
  • FIG. 6 is the heating element 1 a of conductive ceramic material 2 sleeve-shaped, wherein in this embodiment, a central supply line 7 is provided for the glow current, which is preferably also formed from the conductive ceramic material 2.
  • the contact surface 9 is annular.
  • this heating element 1a can have apertures 12, which, on the one hand, effect a better filling of the inner cavity of the heating element 1a during the finished encapsulation with insulating ceramic 3 and, on the other hand, reduce the cross-section of the sleeve-shaped conductor; As a result, the electrical resistance of the heating element 1a is targeted in this area raisable, so that occurs here faster heating.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)

Claims (8)

  1. Barre chauffante avec un élément chauffant (1a) en matériau céramique électroconducteur, qui se présente sous la forme d'un composant en forme de U en section transversale, dans laquelle l'élément chauffant (1a) est noyé dans un corps de barre chauffante (1b) constitué d'une masse céramique isolante électriquement (3), caractérisée en ce que l'élément chauffant (1a) est constitué d'une zone de chauffage (11) en forme de coque hémisphérique avec une zone en forme de douille raccordée d'un seul tenant et est enrobé par injection avec la masse céramique isolante (3) tout en formant le corps de barre chauffante (1b).
  2. Barre chauffante selon la revendication 1, caractérisée en ce que l'on prévoit des ouvertures (12) dans la zone de chauffage (11) de l'élément chauffant (1a).
  3. Barre chauffante selon la revendication 1, caractérisée en ce que la section terminale de l'élément chauffant (1a) se présente sous la forme d'une section de tube de raccordement (9) avec une surface de contact et une ligne d'alimentation en courant est acheminée à la pointe de l'élément chauffant, de manière centrale à travers l'élément chauffant (1a).
  4. Barre chauffante selon l'une quelconque des revendications précédentes, caractérisée en ce que la zone de chauffage (11) de l'élément chauffant (1a) est libérée de la masse céramique isolante (3) sur sa surface externe.
  5. Barre chauffante selon la revendication 3, caractérisée en ce que la ligne d'alimentation en courant est constituée d'une masse céramique électroconductrice (2).
  6. Bougie de préchauffage en forme de barre constituée d'un corps de bougie de préchauffage et d'une barre chauffante incorporée selon l'une quelconque des revendications 1 à 5.
  7. Procédé de fabrication d'une barre chauffante selon la revendication 1, caractérisé en ce que l'élément chauffant (1a) avec une zone de chauffage en forme de coque hémisphérique est fabriqué à partir d'une masse céramique électroconductrice dans un moule par moulage par injection et enrobé par injection dans ce même moule avec une masse céramique isolante électriquement.
  8. Procédé selon la revendication 7, caractérisé en ce que l'agencement formé après l'enrobage par injection de l'élément chauffant est tempéré et les composants en céramique sont ensuite assemblés par frittage via une cuisson pour donner un matériau solide homogène.
EP00111705A 1999-07-02 2000-05-31 Barre chauffante en céramique, bougie à incandescence la comprenant et procédé de production Expired - Lifetime EP1065446B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19930334 1999-07-02
DE19930334A DE19930334C2 (de) 1999-07-02 1999-07-02 Keramischer Heizstab und diesen enthaltende Glühkerze und Verfahren zu dessen Herstellung

Publications (4)

Publication Number Publication Date
EP1065446A2 EP1065446A2 (fr) 2001-01-03
EP1065446A3 EP1065446A3 (fr) 2005-03-02
EP1065446B1 EP1065446B1 (fr) 2008-03-05
EP1065446B2 true EP1065446B2 (fr) 2011-06-08

Family

ID=7913290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00111705A Expired - Lifetime EP1065446B2 (fr) 1999-07-02 2000-05-31 Barre chauffante en céramique, bougie à incandescence la comprenant et procédé de production

Country Status (7)

Country Link
US (1) US6335516B1 (fr)
EP (1) EP1065446B2 (fr)
JP (1) JP2001033037A (fr)
KR (1) KR100588004B1 (fr)
AT (1) ATE388375T1 (fr)
DE (2) DE19930334C2 (fr)
ES (1) ES2298108T3 (fr)

Families Citing this family (21)

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DE10030924A1 (de) * 2000-06-24 2002-01-03 Bosch Gmbh Robert Glühstiftkerze
DE10053327C2 (de) 2000-10-27 2003-04-10 Bosch Gmbh Robert Stiftheizer
DE10104121C2 (de) * 2001-01-29 2003-03-06 Bosch Gmbh Robert Verfahren zur Herstellung eines Startelementes
DE10117641C2 (de) * 2001-04-09 2003-02-27 Beru Ag Stabglühkerze
DE10136596B4 (de) * 2001-07-30 2005-09-15 Beru Ag Verfahren zur Verbindung eines stabförmigen Heizelements mit einem rohrförmigen Gehäuse einer Glühkerze und durch dieses Verfahren hergestellte Glühkerze
JP3870859B2 (ja) * 2001-10-16 2007-01-24 株式会社デンソー グロープラグ
DE10155230C5 (de) * 2001-11-09 2006-07-13 Robert Bosch Gmbh Stiftheizer in einer Glühstiftkerze und Glühstiftkerze
JP3886449B2 (ja) * 2002-12-26 2007-02-28 日本特殊陶業株式会社 グロープラグ及びグロープラグの取付け構造
DE10353972B4 (de) * 2003-11-19 2006-03-16 Beru Ag Verfahren zum Herstellen von keramischen Glühkerzen
DE10353973B4 (de) * 2003-11-19 2006-08-17 Beru Ag Verfahren zum Herstellen eines keramischen Glühstiftes für eine keramische Glühkerze
EP2570726B1 (fr) * 2004-04-07 2018-01-17 Ngk Spark Plug Co., Ltd. Dispositif de chauffage en céramique, son procédé de production et bougie de préchauffage utilisant le dispositif de chauffage en céramique
DE102004033153B4 (de) * 2004-06-11 2007-03-29 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Glühkerze und Verfahren zu ihrer Herstellung
DE102005030208A1 (de) * 2005-06-29 2007-01-25 Robert Bosch Gmbh Glühstiftkerze
DE102006016566B4 (de) * 2005-09-22 2008-06-12 Beru Ag Zusammengesetzter Leiter, insbesondere für Glühkerzen für Dieselmotoren
JP2008020176A (ja) * 2006-06-14 2008-01-31 Ngk Spark Plug Co Ltd センサ内蔵グロープラグ
US8183501B2 (en) * 2007-12-13 2012-05-22 Delphi Technologies, Inc. Method for controlling glow plug ignition in a preheater of a hydrocarbon reformer
US20100078421A1 (en) * 2008-10-01 2010-04-01 Federal-Mogul Italy Sr1 Glow plug adn heater assembly therefor with an improved connection between a central electrode and a heater probe of the heater assembly
DE102011050988B4 (de) * 2011-06-09 2016-04-21 Borgwarner Ludwigsburg Gmbh Glühkerze
DE102011055283B4 (de) 2011-11-11 2016-06-23 Borgwarner Ludwigsburg Gmbh Glühkerze und Verfahren zum Herstellen eines Glühstifts
US9651257B2 (en) * 2012-10-29 2017-05-16 Kyocera Corporation Heater and glow plug equipped with same
CN109341882B (zh) * 2018-10-19 2020-12-01 重庆材料研究院有限公司 铠装热电偶冷端的转接结构及其制备方法

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DE4117253A1 (de) † 1990-05-28 1991-12-12 Jidosha Kiki Co Gluehkerze fuer dieselmotoren
JPH06272860A (ja) † 1993-03-18 1994-09-27 Nippondenso Co Ltd セラミックヒータ
DE19506950A1 (de) † 1995-02-28 1996-08-29 Bosch Gmbh Robert Glühstiftkerze für Dieselmotoren

Also Published As

Publication number Publication date
DE19930334C2 (de) 2003-07-31
ATE388375T1 (de) 2008-03-15
US6335516B1 (en) 2002-01-01
JP2001033037A (ja) 2001-02-09
EP1065446A2 (fr) 2001-01-03
KR100588004B1 (ko) 2006-06-08
ES2298108T3 (es) 2008-05-16
EP1065446B1 (fr) 2008-03-05
DE50015007D1 (de) 2008-04-17
DE19930334A1 (de) 2001-01-11
KR20010049674A (ko) 2001-06-15
EP1065446A3 (fr) 2005-03-02

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