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EP1046013A1 - Bougie-crayon de prechauffage en ceramique - Google Patents

Bougie-crayon de prechauffage en ceramique

Info

Publication number
EP1046013A1
EP1046013A1 EP99969782A EP99969782A EP1046013A1 EP 1046013 A1 EP1046013 A1 EP 1046013A1 EP 99969782 A EP99969782 A EP 99969782A EP 99969782 A EP99969782 A EP 99969782A EP 1046013 A1 EP1046013 A1 EP 1046013A1
Authority
EP
European Patent Office
Prior art keywords
ceramic
glow plug
ring
heating device
combustion chamber
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.)
Ceased
Application number
EP99969782A
Other languages
German (de)
English (en)
Inventor
Albrecht Geissinger
Gert Lindemann
Christoph Haluschka
Thomas Nething
Wolfgang Dressler
Friederike Lindner
Horst Boeder
Matthias Rowek
Wolfgang Otterbach
Christoph Kern
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 EP1046013A1 publication Critical patent/EP1046013A1/fr
Ceased legal-status Critical Current

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
    • 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 ceramic glow plug for diesel engines according to the preamble of the main claim.
  • a glow plug is already known from DE-OS 3 837 128, in which a ceramic heating device is held by the tip of a cylindrical holder. The ceramic heater is electrically isolated from the holder.
  • a ceramic heating device is held by the tip of a cylindrical holder.
  • the ceramic heater is electrically isolated from the holder.
  • connection device which is contacted with the supply voltage.
  • the ceramic heating device consists of a U-shaped heating section, the two ends of the U-shaped heating section being contacted with the connection device via wires or sintered connections.
  • a voltage is applied to the ceramic heating device, so that a current flows from one end of the U-shaped heating section over the combustion chamber-side tip of the heating section to the other end of the U-shaped heating section.
  • the current causes the heating section to heat up due to the resistance of the ceramic, so that it glows and the fuel-air mixture is heated for ignition.
  • the ceramic glow plug according to the invention with the features of the main claim has the advantage that by inserting a ceramic sleeve and a ring in the candle housing, this is filled and thus more stable, and that a sealant that is located between the distant end of the candle housing and when mounting the glow plug the ceramic heater is well compressed.
  • the pressure applied from the opening remote from the combustion chamber is well transmitted to the ceramic heating device via the ring and the ceramic sleeve, so that the desired seating of the ceramic heating device in the metal housing is well ensured.
  • production becomes easier and therefore cheaper.
  • a ceramic sleeve is arranged in the candle housing. At the same time, this provides good insulation of the inner conductor arrangement, which is guided centrally through the ceramic sleeve. Otherwise, the ceramic sleeve can rest directly on the ceramic heating device.
  • a shock-insensitive ring for example a metal ring, has the advantage that when the glow plug is assembled, a selective pressure applied to the metal ring is distributed well over the metal ring over the entire surface of the ceramic sleeve and onto the end surface of the ceramic heater remote from the combustion chamber. Due to the flat distribution of the applied compression pressure, the stress on the ceramic is minimized.
  • the figure shows a longitudinal section through a ceramic glow plug.
  • the glow plug consists of a cylindrical tubular metal housing, which the
  • the candle housing 10 Represents candle housing 10. At its end 11 on the combustion chamber side, the candle housing 10 comprises a ceramic heating device 12.
  • This ceramic heating device 12 is a glow plug embodied as a ceramic layer composite, which consists of an insulating composite ceramic layer 13 which is between two electrically conductive
  • Composite ceramic layers 14 is there. At the tip of the ceramic heating device, the two electrically conductive composite ceramic layers 14 are connected by a thin web made of electrically conductive composite ceramic, so that the electrically conductive composite ceramic layers 14 are arranged essentially in a U-shape.
  • the ceramic heater 12 also referred to as a glow plug, points in its cylindrical candle housing
  • the glow pencil or the Ceramic heater 12 is mounted in the cylindrical candle housing 10 so that a cavity 17 is formed between the inner wall of the tubular metal housing 11 and the outer wall of the ceramic heater 12 in the region of the smaller diameter, which is filled with an electrically conductive, compressible material 18.
  • This electrically conductive material 18 can be, for example, graphite, a metal powder, a powder mixture of ceramic and conductive particles or a hollow cylinder wound from graphite foil.
  • the glow pencil is covered at least in the area in which it is surrounded by the candle housing 10 with an insulating layer 20, this insulating layer being produced by means of glazing.
  • the area in which this insulating layer 20 is applied is hatched in the figure for better identification.
  • a first and a second cutout 21 and 22 are made in the insulating layer 20 for the contacting of the electrically conductive composite ceramic layers.
  • the first recess 21 is located on the front end of the glow plug, in such a way that the connecting bolt is contacted with one leg of the U-shaped electrically conductive ceramic.
  • the second electrical contact takes place on the lateral outer wall of the second leg of the U-shaped, electrically conductive ceramic.
  • This second recess 22 contacts the candle housing via the sealing compound 18, as can be seen in the figure.
  • the cutouts are indicated in the figure with a dark area.
  • the electrically conductive sealing material 18 is first introduced into the candle housing 10 in the form of a preform from the combustion chamber opening. Then the ceramic Heater 12 used. A ceramic sleeve 19 and a metal ring 20 are connected to the ceramic heating device 12 in the candle housing 10, far from the combustion chamber. After these individual elements have been inserted into the tubular metal housing, the glow plug is pressed into the end 11 of the candle housing on the combustion chamber side by means of force and the sealing material 18 is compressed in the process. The volume 17 of the cavity 17 is reduced during the compression process. The housing is then closed by means of a sealing ring 23. The connecting bolt of the inner conductor arrangement is guided through a central opening of the sealing ring. After a definite setting of a defined pressing force, the ring can be connected by a material, non-positive or positive connection
  • Caulking, welding, press connection, screwing, soldering or gluing can be fixed.

Landscapes

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

Abstract

L'invention concerne une bougie de préchauffage en céramique. Un boîtier métallique cylindrique supporte en porte-à-faux, à son extrémité côté chambre de combustion, un dispositif de chauffage en U en céramique et, côté opposé à la chambre de combustion, un boulon d'assemblage permettant d'appliquer une tension au dispositif de chauffage en céramique. Dans le boîtier métallique, une douille céramique et une bague sont raccordées au dispositif de chauffage à l'opposé de la chambre de combustion.
EP99969782A 1998-09-28 1999-09-10 Bougie-crayon de prechauffage en ceramique Ceased EP1046013A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19852785A DE19852785A1 (de) 1998-09-28 1998-09-28 Keramische Glühstiftkerze
DE19852785 1998-09-28
PCT/DE1999/002877 WO2000019148A1 (fr) 1998-09-28 1999-09-10 Bougie-crayon de prechauffage en ceramique

Publications (1)

Publication Number Publication Date
EP1046013A1 true EP1046013A1 (fr) 2000-10-25

Family

ID=7887952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99969782A Ceased EP1046013A1 (fr) 1998-09-28 1999-09-10 Bougie-crayon de prechauffage en ceramique

Country Status (7)

Country Link
US (1) US6437492B1 (fr)
EP (1) EP1046013A1 (fr)
JP (1) JP2002525555A (fr)
KR (1) KR20010032452A (fr)
DE (1) DE19852785A1 (fr)
SK (1) SK7782000A3 (fr)
WO (1) WO2000019148A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19844347A1 (de) * 1998-09-28 2000-03-30 Bosch Gmbh Robert Keramische Glühstiftkerze
DE19959768A1 (de) * 1999-12-11 2001-06-13 Bosch Gmbh Robert Glühstiftkerze
JP4068309B2 (ja) * 2001-03-02 2008-03-26 日本特殊陶業株式会社 ヒータ及びその製造方法
JP2003059624A (ja) * 2001-08-10 2003-02-28 Ngk Spark Plug Co Ltd ヒータ
DE10243017B4 (de) * 2002-01-30 2013-08-22 Robert Bosch Gmbh Keramischer Verbundwerkstoff und Glühstiftkerze mit einem solchen Verbundwerkstoff
DE10343521A1 (de) * 2003-09-19 2005-04-21 Beru Ag Druckmessglühkerze für einen Dieselmotor
DE102005017802A1 (de) * 2005-04-18 2006-10-19 Robert Bosch Gmbh Glühstiftkerze mit Brennraumdrucksensor und Dichtelement
DE102005061879A1 (de) * 2005-12-23 2007-07-05 Robert Bosch Gmbh Glühstiftkerze
US20090184101A1 (en) * 2007-12-17 2009-07-23 John Hoffman Sheathed glow plug
US8164241B2 (en) * 2008-08-15 2012-04-24 Federal Mogul Ignition Company Extension-type spark plug
DE102009028948A1 (de) * 2009-08-27 2011-03-03 Robert Bosch Gmbh Glühkerze zum Einsatz in einem Verbrennungsmotor
JP5426755B2 (ja) * 2010-10-05 2014-02-26 日本特殊陶業株式会社 グロープラグ用ピン端子及びグロープラグ
US9644532B2 (en) * 2015-04-14 2017-05-09 Sheldon J. Demmons Autonomous glow driver for radio controlled engines

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3146653C2 (de) * 1981-02-07 1986-09-04 Robert Bosch Gmbh, 7000 Stuttgart Glühkerze für Brennkraftmaschinen
US4418661A (en) * 1981-02-07 1983-12-06 Robert Bosch Gmbh Glow plug, particularly for diesel engine
DE3817843A1 (de) * 1987-05-29 1988-12-08 Jidosha Kiki Co Gluehkerze fuer dieselmotoren
DE3837128C2 (de) 1987-11-05 1993-11-18 Hitachi Metals Ltd Glühkerze für Dieselmotoren
US5304778A (en) * 1992-11-23 1994-04-19 Electrofuel Manufacturing Co. Glow plug with improved composite sintered silicon nitride ceramic heater
US6248980B1 (en) * 1999-08-19 2001-06-19 Delphi Technologies, Inc. Ion sensor glow plug assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0019148A1 *

Also Published As

Publication number Publication date
KR20010032452A (ko) 2001-04-25
WO2000019148A1 (fr) 2000-04-06
DE19852785A1 (de) 2000-03-30
SK7782000A3 (en) 2000-10-09
JP2002525555A (ja) 2002-08-13
US6437492B1 (en) 2002-08-20

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