EP0812410B1 - Bougie-crayon de prechauffage pour moteurs diesel - Google Patents

Bougie-crayon de prechauffage pour moteurs diesel Download PDF

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Publication number
EP0812410B1
EP0812410B1 EP96900879A EP96900879A EP0812410B1 EP 0812410 B1 EP0812410 B1 EP 0812410B1 EP 96900879 A EP96900879 A EP 96900879A EP 96900879 A EP96900879 A EP 96900879A EP 0812410 B1 EP0812410 B1 EP 0812410B1
Authority
EP
European Patent Office
Prior art keywords
heating device
ceramic heating
glow plug
section
cross
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
EP96900879A
Other languages
German (de)
English (en)
Other versions
EP0812410A1 (fr
Inventor
Johannes Locher
Albrecht Geissinger
Jürgen OBERLE
Werner Teschner
Horst BÖDER
Karl-Heinz Heussner
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 EP0812410A1 publication Critical patent/EP0812410A1/fr
Application granted granted Critical
Publication of EP0812410B1 publication Critical patent/EP0812410B1/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

Definitions

  • the invention is based on a glow plug for diesel engines with a ceramic heater of the genus Main claim. It is already such a glow plug from the DE-OS 38 37 128 known in which a ceramic heater held by the tip of a cylindrical holder becomes. The ceramic heater is against the Electrically insulated holder. On the side of the cylindrical Holder facing the ceramic heater a connection device is provided which is connected to the supply voltage is contacted.
  • the ceramic heater consists of a U-shaped heating section. The both ends of the U-shaped heating section are each with contacted the connecting device.
  • a voltage is applied to the ceramic heater applied such that a current flows through the ceramic heating section from one end of the U-shaped heating section over the combustion chamber tip of the heating section flows to the other end of the U-shaped heating section.
  • the Electricity causes heating due to the resistance of the ceramic of the heating section so that it glows and that Can ignite fuel-air mixture.
  • the glow plug according to the invention with the characteristic Features of the main claim has the advantage that the area the heater most accessible to the combustible mixture because of the greater resistance the fastest way to reach the necessary ignition temperature. Thereby shorter heating times are possible.
  • the increase in resistance by reducing the cross section of the electrical conductive ceramic allows a ceramic Use a heating element with a slightly thicker wall, that then only to the desired one, from the design of the engine dependent points has a reduced cross section. As a result, the mechanical strength in particular ceramic heating section can be increased.
  • FIG. 1 shows a first embodiment the glow plug according to the invention
  • Figure 2 shows a second Embodiment
  • Figure 3 shows a third embodiment
  • Figure 4 shows schematically two possible installation variants of a glow plug in the swirl chamber of an internal combustion engine.
  • FIG. 1 shows a longitudinal section through a first embodiment the invention.
  • the glow plug is here from a cylindrical metal tube 1.
  • This cylindrical Metal tube represents the housing of the glow plug and serves by a thread 2 on the outside for screwing in in the engine block.
  • the cylindrical metal tube also serves as a holder for the glow plug, which in the Combustion chamber protrudes and here for heating the diesel mixture provides.
  • a ceramic heating device 3 as a glow plug, whose head end serves as a heating element.
  • the housing is so in the, not shown Engine block of an internal combustion engine screwed in that the end of the ceramic heater 3 in a cantilever Condition in a combustion chamber of the internal combustion engine protrudes.
  • the ceramic heater 3 is made here made of a U-shaped electrically conductive ceramic.
  • the rear end of the cylindrical metal tube 1 includes a connecting bolt 4, which by means of an insulation layer 5 electrically opposite the cylindrical metal tube 1 is isolated.
  • the connecting bolt 4 is in turn a contact 6 with the ceramic heater 3 in the kind contacted that the contact in the closed combustion chamber side Ceramic heater bottom electric is contacted.
  • Ceramic heater 3 is on its peripheral surface held by the cylindrical metal tube with the cylindrical metal tube 1 electrically contacted, so that the bottom of the ceramic chamber Heating device 3 on the one hand with the supply voltage, which, for example, of the battery, not shown a motor vehicle is delivered, connected and on the other hand via the cylindrical metal tube 1 with mass is contacted.
  • the wall thickness The ceramic heater is not about that entire ceramic heater the same. Rather, it is Wall thickness in the cantilevered end of the ceramic Heater 3 less than at its edge. This causes the resistance on the combustion chamber side the ceramic heater increased so that at at this point the ceramic heater glows first.
  • Figure 2 shows the longitudinal section of a second embodiment the invention.
  • the glow plug of Figure 2 corresponds in principle Structure of the design of Figure 1, which is why provide the individual details with the same reference numerals are and the structure for the same details not again to be explained.
  • the embodiment according to FIG. 2 is also the cross-sectional area of the ceramic heater reduced on the far side of the holder.
  • Figure 1 were here in the wall of the ceramic Heater recesses 7 introduced. With the Number, the diameter and the position of the recesses 7 can be the location of the smallest material cross section and thus the hottest place on the ceramic Heating device can be precisely defined and adjusted.
  • the Cutouts can be in the form of holes be introduced. It is only necessary to ensure that when creating the Voltage the current through the location of the ceramic heater flows at which the cross-sectional area for the Current flow is reduced and thus the resistance is increased.
  • the core of the ceramic heater is one heat-resistant, electrically insulating material filled.
  • FIG. 3 shows a third embodiment of the invention, which is to be explained with reference to FIG. 4.
  • the Figure 3 shows only the ceramic heating pin, since the Structure and arrangement of the metal pipe and the connecting device corresponds to Figures 1 to 2 and not here to be explained again.
  • Figure 4 is schematic a swirl chamber of an internal combustion engine is shown.
  • the Combustion air necessary for the combustion passes through an overflow channel 11 in the swirl chamber during the Fuel is injected into the swirl chamber via a nozzle 12 is so that a combustible mixture forms.
  • Glow plug G1 is in here the so-called current installation position, i.e. the for Combustion air flowing in overflow channel 11 of the swirl chamber hits the glow plug in the upward direction G1.
  • the tip of the glow pen is the furthest here accessible to the flammable mixture. That is why it makes sense also the point with the reduction of the cross section of the electrically conductive ceramics, as described in FIGS. 1 to 2, at the tip of the ceramic heater remote from the holder provided.
  • the second glow plug G2 installed in the so-called current reduction position. Here hits the incoming combustion air in the downward direction on the glow plug G2. For clarification was in the Vortex chamber with the dashed arrow schematically the Direction of flow entered. Because with this current reduction position the glow plug the combustible mixture in a defined Distance from the tip away from the holder to the glow plug hits, the reduced cross-section is also on attached this place. The defined distance is included depending on the design of the engine. Installation in Downstream direction is opposite to the current installation position cheaper in terms of exhaust gas values.
  • the ceramic heater in the form of the glow plug the can be kept self-supporting from the housing, of course also used as a heating device for flame candles become.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Claims (3)

  1. Bougie-crayon pour des moteurs diesel comportant un tube métallique cylindrique (1), un dispositif de branchement pour la mise en contact électrique et un dispositif de chauffage (3) en céramique à section en forme de (U), le tube métallique cylindrique (1) tenant en porte-à-faux à sa pointe le dispositif de chauffage en céramique (3), ce dispositif de chauffage en céramique (3) étant mis en contact avec le dispositif de branchement de façon que pendant la phase d'incandescence, un courant électrique traverse le dispositif de chauffage en céramique (3),
    caractérisée en ce que
    le dispositif de chauffage en céramique (3) comporte au moins un point de section réduite (7, 10), la réduction de section se trouvant dans une zone prédéterminée de la paroi latérale du dispositif de chauffage en céramique (3), et
    pour réduire la section du dispositif du chauffage en céramique (3) on réduit l'épaisseur de la paroi dans cette zone prédéterminée.
  2. Bougie-crayon selon la revendication 1,
    caractérisée en ce que
    pour réduire encore plus la section on prévoit des coupes (7) dans la paroi du dispositif de chauffage en céramique (3).
  3. Bougie-crayon selon l'une des revendications précédentes,
    caractérisée en ce que
    le dispositif du chauffage en céramique (3) est rempli d'une matière isolante électrique (8), réfractaire.
EP96900879A 1995-02-28 1996-02-01 Bougie-crayon de prechauffage pour moteurs diesel Expired - Lifetime EP0812410B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19506950 1995-02-28
DE19506950A DE19506950C2 (de) 1995-02-28 1995-02-28 Glühstiftkerze für Dieselmotoren
PCT/DE1996/000142 WO1996027104A1 (fr) 1995-02-28 1996-02-01 Bougie-crayon de prechauffage pour moteurs diesel

Publications (2)

Publication Number Publication Date
EP0812410A1 EP0812410A1 (fr) 1997-12-17
EP0812410B1 true EP0812410B1 (fr) 2003-05-28

Family

ID=7755242

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96900879A Expired - Lifetime EP0812410B1 (fr) 1995-02-28 1996-02-01 Bougie-crayon de prechauffage pour moteurs diesel

Country Status (9)

Country Link
US (1) US6054680A (fr)
EP (1) EP0812410B1 (fr)
JP (1) JP3897813B2 (fr)
KR (1) KR100310921B1 (fr)
CN (1) CN1131962C (fr)
BR (1) BR9607050A (fr)
DE (2) DE19506950C2 (fr)
RU (1) RU2164310C2 (fr)
WO (1) WO1996027104A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19757725C5 (de) * 1997-12-23 2004-02-26 Beru Ag Dieselstarthilfe
DE19930334C2 (de) † 1999-07-02 2003-07-31 Beru Ag Keramischer Heizstab und diesen enthaltende Glühkerze und Verfahren zu dessen Herstellung
DE19959768A1 (de) * 1999-12-11 2001-06-13 Bosch Gmbh Robert Glühstiftkerze
DE10030924A1 (de) * 2000-06-24 2002-01-03 Bosch Gmbh Robert Glühstiftkerze
DE10053327C2 (de) 2000-10-27 2003-04-10 Bosch Gmbh Robert Stiftheizer
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
US6539905B1 (en) 2001-10-25 2003-04-01 International Engine Intellectual Property Company, L.L.C. Glow plug connection apparatus
US20030085214A1 (en) * 2001-11-07 2003-05-08 University Of Colorado At Boulder Micro-glow plug and method of making same field of the invention
DE10155230C5 (de) * 2001-11-09 2006-07-13 Robert Bosch Gmbh Stiftheizer in einer Glühstiftkerze und Glühstiftkerze
DE102007044967A1 (de) * 2007-09-19 2009-04-02 Beru Ag Glühkerze mit verkokungsoptimiertem Design, spezielle Ringspaltausbildung
DE102008009441B4 (de) * 2008-02-13 2011-08-25 Beru AG, 71636 Druckmessglühkerze
DE102008017110B3 (de) * 2008-04-02 2009-09-10 Beru Ag Druckmessglühkerze
DE102010013598B4 (de) * 2010-03-31 2012-05-24 Borgwarner Beru Systems Gmbh Glühkerze

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2755968A1 (de) * 1977-01-19 1978-07-20 Emerson Electric Co Gluehzuendkerze
DE2744624A1 (de) * 1977-10-04 1979-04-12 Bosch Gmbh Robert Gluehstiftkerze fuer brennkraftmaschinen
US4437440A (en) * 1979-06-20 1984-03-20 Ngk Spark Plug Co., Ltd. Auxiliary combustion chamber preheating device
US4475030A (en) * 1981-09-25 1984-10-02 Caterpillar Tractor Co. Glow plug having resiliently mounted ceramic surface-ignition element
DE3243743A1 (de) * 1982-11-26 1984-05-30 Robert Bosch Gmbh, 7000 Stuttgart Sensor
US4682008A (en) * 1985-03-22 1987-07-21 Jidosha Kiki Co., Ltd. Self-temperature control type glow plug
JPS61217624A (ja) * 1985-03-22 1986-09-27 Jidosha Kiki Co Ltd 自己温度制御型グロ−プラグ
JPS62731A (ja) * 1985-06-27 1987-01-06 Jidosha Kiki Co Ltd デイ−ゼルエンジン用グロ−プラグ
DE3701929A1 (de) * 1986-01-22 1987-08-13 Jidosha Kiki Co Gluehkerze fuer eine dieselmaschine
US4810853A (en) * 1986-10-28 1989-03-07 Hitachi Metals Ltd. Glow plug for diesel engines
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
GB2220446B (en) * 1988-04-06 1992-05-27 Champion Spark Plug Europ Glow plug for internal combustion engine
CH681186A5 (fr) * 1989-11-09 1993-01-29 Battelle Memorial Institute
US5304778A (en) * 1992-11-23 1994-04-19 Electrofuel Manufacturing Co. Glow plug with improved composite sintered silicon nitride ceramic heater
US5367994A (en) * 1993-10-15 1994-11-29 Detroit Diesel Corporation Method of operating a diesel engine utilizing a continuously powered glow plug
DE4335292A1 (de) * 1993-10-15 1995-04-20 Beru Werk Ruprecht Gmbh Co A Glühkerze
JPH09105677A (ja) * 1995-10-12 1997-04-22 Isuzu Ceramics Kenkyusho:Kk セラミックシース型部品及びその製造方法

Also Published As

Publication number Publication date
KR19980702676A (ko) 1998-08-05
CN1176688A (zh) 1998-03-18
JPH11500820A (ja) 1999-01-19
DE59610477D1 (de) 2003-07-03
DE19506950A1 (de) 1996-08-29
US6054680A (en) 2000-04-25
RU2164310C2 (ru) 2001-03-20
CN1131962C (zh) 2003-12-24
JP3897813B2 (ja) 2007-03-28
EP0812410A1 (fr) 1997-12-17
DE19506950C2 (de) 1998-07-23
WO1996027104A1 (fr) 1996-09-06
BR9607050A (pt) 1997-12-30
KR100310921B1 (ko) 2001-12-17

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