EP2649375A1 - Bougie de préchauffage et son procédé de fabrication - Google Patents

Bougie de préchauffage et son procédé de fabrication

Info

Publication number
EP2649375A1
EP2649375A1 EP11776444.9A EP11776444A EP2649375A1 EP 2649375 A1 EP2649375 A1 EP 2649375A1 EP 11776444 A EP11776444 A EP 11776444A EP 2649375 A1 EP2649375 A1 EP 2649375A1
Authority
EP
European Patent Office
Prior art keywords
glow
glow tube
connecting bolt
insulating layer
tube
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.)
Granted
Application number
EP11776444.9A
Other languages
German (de)
English (en)
Other versions
EP2649375B1 (fr
Inventor
Andreas Reissner
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2649375A1 publication Critical patent/EP2649375A1/fr
Application granted granted Critical
Publication of EP2649375B1 publication Critical patent/EP2649375B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F23Q7/001—Glowing plugs for internal-combustion engines

Definitions

  • the invention relates to a glow plug according to the preamble of claim 1 and to a method for producing the glow plug.
  • the glow plugs of the prior art have a glow plug inserted into a metallic housing, which is designed with an glow tube and an incandescent tube arranged in the glow tube.
  • the incandescent filament is electrically contacted at one end in an opening of the glow tube with a connecting bolt and at the other end with the metallic glow tube.
  • the opening of the glow tube is sealed between glow tube and connecting bolt to protect the filament by means of a radiator seal against ambient air. So that no short circuit occurs between the glow tube and connecting bolt, the radiator seal is performed by a sealing element made of an elastomer.
  • the maximum temperature for the elastomeric sealing element is limited to 1000 hours for long-term use at 200 ° C.
  • a metallic sealing ring as a sealing element between glow tube and connecting bolt.
  • For electrical insulation of the metallic sealing ring of the connecting bolt is provided in the sealing area with an electrical insulating layer.
  • the metallic sealing ring is used as a solder joint, welded joint or sintered metal powder.
  • the glow plug according to the invention and the inventive method for producing the glow plug have the advantage that a safe and inexpensive radiator seal can be achieved, which achieves high temperature resistance, because the operating temperature of the radiator seal is limited only by the properties of the electrical insulating layer. Depending on the material used for the electrical insulating layer, the operating temperature is limited only by the material for the glow tube, the connecting bolt and the housing. In this case, the connection-side region of the glow plug can be exposed to the same temperatures in extreme cases as in the annealing range of the glow plug.
  • the electrical insulating layer is formed at least in the region of the sealing portion on the connecting bolt and / or on the inner wall of the glow tube.
  • the press connection between glow tube, sealing element and connecting bolt is achieved by the glow tube has a diameter reduction at least in the region of the sealing portion, by means of which the glow tube is pressed onto the connecting bolt.
  • Figure 1 is a sectional view through a glow plug
  • FIG. 2 shows an enlarged section II of the glow plug in FIG. 1.
  • the glow plug shown in Figure 1 has a metallic housing 10 with a continuous longitudinal bore 12 in which a glow plug 14 is pressed as a radiator.
  • the glow plug 14 consists of a metallic glow tube 16, in which an incandescent filament 18 is arranged, which is contacted at one end with the glow tube 16 and at the other end with a terminal bolt 17 electrically.
  • the connecting bolt 17, which is led out of the housing 10 at the opposite end to the glow plug 14 with a connection 21, is surrounded within the housing 10 by an annular space 13, which in turn is sealed off from the surroundings.
  • the glow tube 16 is closed at the pointing into a combustion chamber of an internal combustion engine end and has at the opposite end to the annular space 13 toward an opening 22.
  • the radiator seal 30 is formed by at least one electrical insulating layer 33 and a press connection of the glow tube 16 in the region of the electrical insulating layer 33 with the connecting bolt 17.
  • the electrical insulating layer 33 is formed according to Figure 2, at least in the region of the sealing portion 23 on the connecting bolt 17. However, the electrical insulating layer 33 may also be formed at least in the region of the sealing portion 23 on the inner wall of the glow tube 16 or at least in the region of the sealing portion 23 on the connecting bolt 17 and on the inner wall of the glow tube 16.
  • the electrical insulation layer 33 may consist, for example, of glass, silicate, boron or bosilicate glass, metal oxides, metal nitrides or metal oxynitrides.
  • the electrical insulating layer 33 is applied by methods known per se, for example by means of vapor deposition.
  • the electrical insulating layer 33 is first applied to the connecting bolt 17 and / or to the inner wall of the glow tube 16. To form the radiator seal 30, a gas-tight connection between the glow tube 16 and connecting bolt 17 in the region of the sealing portion 23 is produced.
  • the sealing section 23 extends exclusively to the region of the electrical insulating layer 33 so that no electrical short circuit between the connecting pin 17 and the glow tube 16 is formed.
  • the diameter of the glow tube 16 is provided in the sealing portion 23, for example by means of rotary swaging with a diameter reduction 26, by means of which the glow tube 16 is pressed with the diameter of the electrical insulating layer 33 on the connecting bolt 17.

Landscapes

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

Abstract

L'invention concerne une bougie de préchauffage comprenant un crayon de préchauffage (14) logé dans une enveloppe métallique. Le crayon de préchauffage comprend un tube incandescent (16) et un filament spiralé (18) placé dans le tube incandescent, une extrémité du filament spiralé étant en contact électrique avec le tube incandescent et son autre extrémité étant en contact électrique avec une tige de connexion (17). La tige de connexion fait saillie dans une ouverture axiale (22) du tube incandescent et, dans une partie d'étanchéité (23), ladite tige est reliée au tube incandescent de manière électriquement isolante au moyen d'un joint d'étanchéité de corps de chauffe. Au moins dans la partie d'étanchéité, au moins une couche d'isolation électrique (33) est réalisée sur le tube incandescent et/ou sur la tige de connexion. Pour permettre la réalisation du joint d'étanchéité de corps de chauffe, le tube incandescent est pressé sur la tige de connexion dans la zone de la couche d'isolation électrique.
EP11776444.9A 2010-12-06 2011-10-31 Bougie de préchauffage et son procédé de fabrication Active EP2649375B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010062443A DE102010062443A1 (de) 2010-12-06 2010-12-06 Glühkerze und Verfahren zu deren Herstellung
PCT/EP2011/069086 WO2012076254A1 (fr) 2010-12-06 2011-10-31 Bougie de préchauffage et son procédé de fabrication

Publications (2)

Publication Number Publication Date
EP2649375A1 true EP2649375A1 (fr) 2013-10-16
EP2649375B1 EP2649375B1 (fr) 2016-05-18

Family

ID=44897767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11776444.9A Active EP2649375B1 (fr) 2010-12-06 2011-10-31 Bougie de préchauffage et son procédé de fabrication

Country Status (4)

Country Link
EP (1) EP2649375B1 (fr)
CN (1) CN103228992B (fr)
DE (1) DE102010062443A1 (fr)
WO (1) WO2012076254A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10670276B2 (en) * 2013-05-02 2020-06-02 Original Pellet Grill Company Llc Double-sealed high-temperature resistant DC ignitor for use with wood pellet burner assemblies
DE102014220235A1 (de) * 2014-10-07 2016-04-07 Robert Bosch Gmbh Heizkörper für eine elektrisch beheizbare Glühstiftkerze mit axial gepresstem Heizeinsatz, und zugehöriges Herstellungsverfahren
CN104439693A (zh) * 2014-12-08 2015-03-25 西安创新精密仪器研究所 同种或异种金属材料管材与棒材之间的旋锻连接工艺
DE102017128885A1 (de) * 2017-12-05 2019-06-06 Schaeffler Technologies AG & Co. KG Elektrisch isolierendes Wälzlager

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1119597B (de) * 1958-11-13 1961-12-14 Bosch Gmbh Robert Gluehkerze fuer Brennkraftmaschinen
DE19914619A1 (de) * 1999-03-31 2000-10-12 Beru Ag Verfahren zum abdichtenden Verschließen des anschlußseitigen Endbereichs des Glührohres einer Glühkerze und Glühkerzen mit verfahrensgemäßem Verschluß
CN1137330C (zh) * 2000-08-24 2004-02-04 日本特殊陶业株式会社 预热塞和火花塞及其制造方法
US6900412B2 (en) * 2002-08-12 2005-05-31 Ngk Spark Plug Co., Ltd. Glow plug
JP4172486B2 (ja) * 2003-12-19 2008-10-29 ボッシュ株式会社 セラミックスヒータ型グロープラグ
JP4309757B2 (ja) * 2003-12-26 2009-08-05 日本特殊陶業株式会社 セラミックヒーター
DE102005029839A1 (de) * 2005-06-27 2007-01-04 Robert Bosch Gmbh Glühstiftkerze
US20090184101A1 (en) * 2007-12-17 2009-07-23 John Hoffman Sheathed glow plug
US20100059496A1 (en) 2008-09-08 2010-03-11 Federal-Mogul Ignition Company Metal sheath glow plug

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012076254A1 *

Also Published As

Publication number Publication date
CN103228992B (zh) 2015-11-25
WO2012076254A1 (fr) 2012-06-14
DE102010062443A1 (de) 2012-06-06
EP2649375B1 (fr) 2016-05-18
CN103228992A (zh) 2013-07-31

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