EP0812410A1 - Bougie-crayon de prechauffage pour moteurs diesel - Google Patents

Bougie-crayon de prechauffage pour moteurs diesel

Info

Publication number
EP0812410A1
EP0812410A1 EP96900879A EP96900879A EP0812410A1 EP 0812410 A1 EP0812410 A1 EP 0812410A1 EP 96900879 A EP96900879 A EP 96900879A EP 96900879 A EP96900879 A EP 96900879A EP 0812410 A1 EP0812410 A1 EP 0812410A1
Authority
EP
European Patent Office
Prior art keywords
heating device
ceramic heating
glow plug
ceramic
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.)
Granted
Application number
EP96900879A
Other languages
German (de)
English (en)
Other versions
EP0812410B1 (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

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 glow plug for diesel engines with a ceramic heater according to the preamble of the main claim.
  • a glow plug is already known from DE-OS 38 37 128, 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 connection device is provided which is in contact with the supply voltage.
  • the ceramic heating device consists of a U-shaped heating section. The two ends of the U-shaped heating section are each contacted with the connection device.
  • a voltage is applied to the ceramic heating device in such a way that a current flows through the ceramic heating section, from one end of the U-shaped heating section via the combustion chamber tip of the heating section to the other end of the U-shaped heating section flows. Because of the resistance of the ceramic, the current heats the heating section so that it glows and can ignite the fuel-air mixture.
  • the glow plug according to the invention with the characterizing features of the main claim has the advantage that the area of the heating device which is most accessible to the combustible mixture reaches the necessary ignition temperature the fastest due to the greater resistance. There- shorter heating times are possible.
  • the increase in resistance by reducing the cross section of the electrically conductive ceramic makes it possible to use a ceramic heating element of somewhat thicker wall thickness, which then has a reduced cross section only at the desired points which are dependent on the design of the motor. As a result, the mechanical strength, in particular of the ceramic heating section, can be increased.
  • the defined reduction in the wall thickness makes it possible to heat up the point of the glow plug which is hit by the fuel mixture.
  • FIG. 1 shows a first embodiment of the glow plug according to the invention
  • FIG. 2 shows a second embodiment
  • FIG. 3 shows a third embodiment
  • FIG. 4 shows a fourth embodiment
  • Figure 5 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 of the invention.
  • the glow plug consists of a cylindrical metal tube 1.
  • This cylindrical metal tube represents the housing of the glow plug and is used for screwing into the engine block by means of a thread 2 on the outside.
  • the cylindrical metal tube also serves as a holder for the glow plug, which protrudes into the combustion chamber and heats the diesel mixture here.
  • a ceramic heating device 3 the head end of which serves as a heating element, is introduced into a tip of the cylindrical metal tube 1 as a glow plug.
  • the housing is screwed into the engine block (not shown) of an internal combustion engine such that the end of the ceramic heating device 3 projects into a combustion chamber of the internal combustion engine in a self-supporting state.
  • the ceramic heating device 3 consists of an electrically conductive ceramic, which has the shape of a sleeve closed on one side.
  • the rear end of the cylindrical metal tube 1 comprises a connecting bolt 4, which is electrically insulated from the cylindrical metal tube 1 by means of an insulation layer 5.
  • the connecting pin 4 is in turn contacted via a contact 6 with the ceramic heating device 3 in such a way that the contact in the closed combustion chamber side bottom of the ceramic heater is electrically conductively contacted.
  • the ceramic heating device 3 is electrically contacted on its circumferential surface held by the cylindrical metal tube with the cylindrical metal tube 1, so that the bottom of the ceramic heating device 3 on the combustion chamber side, on the one hand, is connected to the supply voltage, for example from the battery (not shown) Motor vehicle is supplied, connected and on the other hand is contacted via the cylindrical metal tube 1 with ground. This results in a current flow from the closed bottom of the ceramic heating device 3 via the side walls of the sleeve-shaped ceramic heating device to the cylindrical metal tube by mass.
  • the wall thickness of the ceramic heating device is not the same over the entire ceramic heating device. Rather, the wall thickness in the unsupported end of the ceramic heating device 3 on the combustion chamber side is smaller than at the edge of the sleeve-shaped ceramic.
  • the ceramic heating device As a result, the resistance on the combustion chamber side of the ceramic heating device is increased, so that the ceramic heating device first glows at this point.
  • the ceramic heating device it is not absolutely necessary for the ceramic heating device to have a sleeve shape.
  • a U-shaped ceramic heating device is also conceivable, for example, the wall thickness of the end of the ceramic heating device on the combustion chamber side being tapered relative to the end of the ceramic heating device fastened in the cylindrical metal tube.
  • the representation of such a U-shaped ceramic heating device in a sectioned form is identical to the sectioning representation of a sleeve-shaped ceramic heating device, so that only one figure is shown for both variants.
  • Figure 2 shows the longitudinal section of a second embodiment of the invention
  • the basic structure of the glow plug candle of FIG. 2 corresponds to the structural design of FIG. Half of the individual details are provided with the same reference numerals and the structure for the same details is not to be explained again.
  • the cross-sectional area of the ceramic heating device on the side remote from the holder is also reduced.
  • cutouts 7 were made in the wall of the ceramic heating device. With the number, the diameter and the position of the recesses 7 introduced, the location of the smallest material cross-section and thus the hottest location on the ceramic heating device can be precisely defined and set.
  • the basic shape of the ceramic heating devices is insignificant since these cutouts in the form of bores in any shape, for example in U-shaped and sleeve-shaped ceramic heating devices, can be made. It is only necessary to ensure that when the voltage is applied, the current flows through the location of the ceramic heating device, 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 filled with a heat-resistant, electrically insulating material.
  • FIG 3 shows a third embodiment, the basic structure of the glow plug again corresponds to the structure of Figures 2 and 3.
  • the only difference is the design of the ceramic heating section.
  • the ceramic heating device has a rod shape, with an annular recess 8, which has a concentric core 9.
  • the annular recess 8 extends almost over the entire length of the ceramic heating device 3 in such a way that on the side of the ceramic heating device 5 remote from the housing, the cross section of the electrical ceramic is again reduced in a defined manner by the annular recess being so far into the away from the tip rod-shaped ceramic heater protrudes that the cross-sectional area for the current is lowest here.
  • FIG. 4 shows a fourth embodiment of the invention, which will be explained with reference to FIG. 5.
  • FIG. 4 shows only the ceramic heating pin, since the structure and arrangement of the metal tube and the connecting device correspond to FIGS. 1 to 3 and will not be explained again here.
  • a vortex chamber of an internal combustion engine is shown schematically in FIG.
  • the combustion air necessary for the combustion enters the swirl chamber via an overflow channel 11, while the fuel is injected into the swirl chamber via a nozzle 12, so that a combustible mixture is formed.
  • 5 shows two installation options for glow plugs.
  • the glow plug Gl is shown here in the so-called current installation position, ie the combustion air flowing in to the overflow channel 11 of the swirl chamber hits the glow plug Gl in the upward direction.
  • the tip of the glow pencil which is far from the holder, is most accessible to the flammable mixture. It is therefore sensible to provide the point with the reduction in the cross section of the electrically conductive ceramic, as described in FIGS. 1 to 3, on the tip of the ceramic heating device remote from the holder.
  • the second glow plug G2 is installed in the so-called current-reducing position.
  • the incoming combustion air hits the glow plug G2 in the downward direction.
  • the flow direction was schematically entered in the swirl chamber with the dashed arrow. Since the combustible mixture impinges on the glow plug at a defined distance from the tip remote from the holder, the reduced cross section is also applied at this point, since the glow plug has a current-reducing position.
  • the defined distance depends on the design of the motor. Installation in the downstream direction is more favorable compared to the current installation position in terms of exhaust gas values.
  • the ceramic heating device in the form of the glow plug which is held in a self-supporting manner by the housing, can of course also be used as a heating device for flame candles.

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)

Abstract

Une bougie-crayon de préchauffage sert à préchauffer le mélange dans la chambre de combustion d'un moteur à combustion interne à allumage spontané. La bougie-crayon de préchauffage comprend un dispositif de chauffage céramique et la résistance du dispositif de chauffage céramique est accrue par une réduction de sa section transversale à l'endroit où le mélange est le plus facile d'accès dans la chambre de combustion.
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
DE19506950A DE19506950C2 (de) 1995-02-28 1995-02-28 Glühstiftkerze für Dieselmotoren
DE19506950 1995-02-28
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 true EP0812410A1 (fr) 1997-12-17
EP0812410B1 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9627104A1 *

Also Published As

Publication number Publication date
JP3897813B2 (ja) 2007-03-28
DE19506950A1 (de) 1996-08-29
KR19980702676A (ko) 1998-08-05
KR100310921B1 (ko) 2001-12-17
DE19506950C2 (de) 1998-07-23
BR9607050A (pt) 1997-12-30
US6054680A (en) 2000-04-25
JPH11500820A (ja) 1999-01-19
WO1996027104A1 (fr) 1996-09-06
DE59610477D1 (de) 2003-07-03
CN1176688A (zh) 1998-03-18
CN1131962C (zh) 2003-12-24
RU2164310C2 (ru) 2001-03-20
EP0812410B1 (fr) 2003-05-28

Similar Documents

Publication Publication Date Title
DE3010591C2 (fr)
DE3731211C2 (fr)
EP0102507B1 (fr) Dispositif destiné à l'injection du combustible dans les chambres de combustion des moteurs à combustion interne du type à auto-allumage
EP0158739B1 (fr) Dispositif destiné à l'injection du combustible dans les chambres de combustion
EP1431571B1 (fr) Soupape d'injection de carburant à bougie integrée
DE19506950C2 (de) Glühstiftkerze für Dieselmotoren
WO1984004800A1 (fr) Dispositif d'injection de carburant dans des chambres de combustion
WO2003040623A1 (fr) Filament en forme de crayon
DE10239411B4 (de) Vorrichtung zum Zünden eines Luft-Kraftstoff-Gemischs in einem Verbrennungsmotor
EP1240461B1 (fr) Bougie de prechauffage
EP1046013A1 (fr) Bougie-crayon de prechauffage en ceramique
DE19844347A1 (de) Keramische Glühstiftkerze
DE10239409B4 (de) Vorrichtung zum Zünden eines Luft-Kraftstoff-Gemischs in einem Verbrennungsmotor
DE10239414B4 (de) Vorrichtung zum Zünden eines Luft-Kraftstoff-Gemischs in einem Verbrennungsmotor
DE10155230C1 (de) Stiftheizer in einer Glühstiftkerze und Glühstiftkerze
DE3307666A1 (de) Einrichtung zum einspritzen von kraftstoff in brennraeume, insbesondere in brennkammern von dieselmotoren
DE3206708A1 (de) Zuendkerze mit einer zuendkammer
EP0475288B1 (fr) Dispositif d'allumage à jet de plasma
DE3805933C2 (de) Einrichtung zum Einspritzen von Kraftstoff
WO2008017600A1 (fr) Dispositif d'allumage haute fréquence
DE3602136C2 (fr)
DE3114958C2 (fr)
DE10239412B4 (de) Vorrichtung zum Zünden eines Luft-Kraftstoff-Gemischs in einem Verbrennungsmotor
DE2751145C2 (de) Glühkerze für mit flüssigem Brennstoff betriebene Fahrzeug-Zusatzheizgeräte
DE10360191A1 (de) Vorrichtung zum Zünden eines Luft-Kraftstoff-Gemischs in einem Verbrennungsmotor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19970929

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19980330

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 59610477

Country of ref document: DE

Date of ref document: 20030703

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040302

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20050119

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060201

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060228

Year of fee payment: 11

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20060201

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20070216

Year of fee payment: 12

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20081031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070201

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20150424

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59610477

Country of ref document: DE