EP2284444A2 - Bougie de préchauffage - Google Patents

Bougie de préchauffage Download PDF

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Publication number
EP2284444A2
EP2284444A2 EP10007778A EP10007778A EP2284444A2 EP 2284444 A2 EP2284444 A2 EP 2284444A2 EP 10007778 A EP10007778 A EP 10007778A EP 10007778 A EP10007778 A EP 10007778A EP 2284444 A2 EP2284444 A2 EP 2284444A2
Authority
EP
European Patent Office
Prior art keywords
glow plug
housing
plug according
substance
heating element
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.)
Withdrawn
Application number
EP10007778A
Other languages
German (de)
English (en)
Other versions
EP2284444A3 (fr
Inventor
Christian Pottiez
Jochen Dr. Hammer
Yue Dr. Cheng
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
BorgWarner Beru Systems 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 BorgWarner Beru Systems GmbH filed Critical BorgWarner Beru Systems GmbH
Publication of EP2284444A2 publication Critical patent/EP2284444A2/fr
Publication of EP2284444A3 publication Critical patent/EP2284444A3/fr
Withdrawn legal-status Critical Current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
    • F23Q7/001—Glowing plugs for internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F02P19/028—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs the glow plug being combined with or used as a sensor
    • 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
    • F23Q2007/002—Glowing plugs for internal-combustion engines with sensing means

Definitions

  • the invention relates to a glow plug with the features specified in the preamble of claim 1.
  • a glow plug is from the WO 2005/090865 A1 known.
  • Object of the present invention is to show a way how the combustion chamber pressure of a diesel engine by means of a pressure measuring device of a glow plug with greater accuracy can be measured.
  • a substance is introduced into a sealed housing interior, which at the temperatures occurring there during operation of liquid to pasty consistency is or will and directs heat generated by the heating element to the housing.
  • the heating element is thermally coupled better to the housing.
  • the material filled in the housing interior must not prevent an axial movement of the heating element. It is therefore important that the material used is or will be of liquid to pasty consistency at the operating temperatures. It does not hurt if the filled material solidifies with the engine stopped, since pressure measurements are anyway made only when the engine is running.
  • the glow plug heats up so that the material used for heat dissipation becomes liquid or pasty.
  • the substance used for heat dissipation is preferably liquid or pasty at 100 ° C., more preferably over the entire range of use of -40 ° C. and 400 ° C.
  • Suitable examples are organic or organosilicon substances of waxy or oily consistency.
  • Oils in particular mineral oils and silicone oils, have an advantageously low viscosity at the temperatures which occur in the interior of a glow plug when the engine is running, so that axial movements of the heating element in the relevant temperature range are hindered, if at all, immaterial.
  • the oils used may be liquid or pasty at room temperature, but this is not essential. It does not hurt if the oils used have a waxy consistency at room temperature and liquefy or become pasty only at temperatures of 100 ° C or more.
  • the heating element in a front part of the housing may also be surrounded by a metal which liquefies at such temperatures, for example a soft solder, an alkali metal, especially sodium, or their compounds.
  • Soft solders such as tin / lead alloys and / or indium alloys, have good thermal conductivity and therefore can dissipate heat from a rear portion of the heater rod to the housing. Since the outside of the heating element is usually grounded in both ceramic and metallic heating elements, electrical insulation of the heating element relative to the housing is not necessary. The electrical conductivity of a heating rod in the housing surrounding soft solder is therefore not a disadvantage.
  • the substance used to improve the heat dissipation is filled in a housing chamber which is closed by a seal.
  • the interior of the housing chamber extends between the seal and a measuring diaphragm.
  • the housing chamber which contains the material used to improve the heat dissipation, filled to at least 50%.
  • glow plug has a housing 1 with an external thread 2 for screwing into an engine block. From a front end of the housing 1 protrudes a heating element 3, which is movable in the housing 1 in the axial direction.
  • the combustion chamber pressure acting on the heating rod 3 can be measured with a pressure measuring device, which in the illustrated embodiment has a measuring diaphragm 4 which is fastened to the housing 1, for example by being clamped between a front and a rear housing part.
  • the Measuring diaphragm 4 divides the housing interior into a front compartment and a rear compartment.
  • the measuring diaphragm 4 is preferably fastened with its inner circumference to the heating rod 3.
  • the measuring membrane 4 could also be attached to an inner pole 5, via which the heating element 3 is supplied with power during operation.
  • the inner pole 5 may be executed in the illustrated embodiment as a rod or strand.
  • the inner pole 5 is enclosed by an insulating sleeve 8.
  • This movement of the heating element 3 can be used for a pressure measurement.
  • an axial movement of the heating element 3 leads to a deformation of the measuring diaphragm 4, which generates a restoring force.
  • This deformation can be detected with one or more measuring elements 6 carried by the measuring diaphragm 4, for example strain gauges.
  • the measuring elements 6 are preferably arranged on the rear end of the housing 1 facing side of the measuring diaphragm 4.
  • the measuring signals generated by the one or more measuring elements can be processed with an electronic module, not shown, before they are transmitted with (not shown) extending at the inner pole 5 along signal lines.
  • a housing interior is filled with an organic or silicon-organic substance 7 of waxy or oily consistency, which dissipates heat from the heating element 3 to the housing 1.
  • an organic or silicon-organic substance 7 of waxy or oily consistency, which dissipates heat from the heating element 3 to the housing 1.
  • a rear part of the housing 1 between the measuring diaphragm 4 and a sealed rear end of the housing with silicone oil 7 is filled.
  • the silicone oil 7 surrounds the inner pole 5 leading to the heating element 3 and dissipates heat from the rear end of the heating element 3 and the measuring membrane 4.
  • FIG. 2 shows a further embodiment of a glow plug is shown, which differs from the embodiment described above only in that a front part of the space inside the chamber is filled with a heat conductive material 9.
  • the housing 1 is closed at its front end with a seal 10, which may be formed, for example, as a fixed to the heating element 3 and the housing 1 membrane.
  • the metal membrane used as a seal 10 can be soldered to a ceramic heating element 3 or its metallic protective sleeve can be welded.
  • the metal membrane used as the seal 10 is preferably welded, but may also be soldered. If a metallic heating element is used instead of a ceramic heating element, the metal membrane can be welded to the heating element 3.
  • the metal diaphragm can also be formed integrally with the housing or the housing part 1a.
  • the surrounding the heating element 3 fabric 9 is at least at the occurring in operation in the front housing part 1 a temperatures of more than 200 ° C, preferably already at 100 ° C, of liquid or pasty consistency, preferably liquid, and conducts heat from the heating element. 3 to the surrounding housing from 1, 1a without an axial movement of the heating element 3 to prevent.
  • Many indium alloys, in particular indium-bismuth alloys, for example In51Bi32.5Sn16.5, have melting points of considerably less than 100 ° C.
  • the available space or partial space in the interior of the housing 1 is only partially filled with the heat-conducting substance 7, 9 and always contains also some air.
  • FIG. 2 It can be seen that the partial space between the seal 10 at the front end of the housing 1 and the measuring diaphragm 4 only partially with the heat-conducting Fabric 9 is filled.
  • the filling level can be between 20% and 95%. Filling levels of 50% to 95% are preferred.
  • the rear subspace is also included FIG. 1 preferably only partially filled with the heat-conducting substance 7.
  • FIG. 1 are a corresponding air bubble and a seal at the rear end of the housing 1 for the sake of simplicity not shown.
  • thermally conductive material 7 and 9 is filled in both the rear part of the housing 1 and in the front part of the housing 1.
  • different substances are preferably used for the front and the rear subspace.
  • An electrically insulating oil in particular a silicone oil, is preferably used for the front partial space.
  • electrically insulating properties are insignificant and for a higher temperature resistance required.
  • the heat dissipation from the heating element 3 to the surrounding housing 1 can be achieved in the case of the FIG. 1 illustrated embodiment also be improved in that between the heating element 3 and the housing 1, a ring or a sleeve are arranged made of an elastomer, for example, a perfluoroelastomer.
  • elastomer for example, a perfluoroelastomer.
  • Perfluoroelastomers advantageously combine high temperature resistance with a low coefficient of friction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Fluid Pressure (AREA)
  • Fats And Perfumes (AREA)
EP10007778A 2009-08-12 2010-07-27 Bougie de préchauffage Withdrawn EP2284444A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009037375A DE102009037375B3 (de) 2009-08-12 2009-08-12 Glühkerze

Publications (2)

Publication Number Publication Date
EP2284444A2 true EP2284444A2 (fr) 2011-02-16
EP2284444A3 EP2284444A3 (fr) 2012-01-04

Family

ID=43416211

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10007778A Withdrawn EP2284444A3 (fr) 2009-08-12 2010-07-27 Bougie de préchauffage

Country Status (6)

Country Link
US (1) US8389904B2 (fr)
EP (1) EP2284444A3 (fr)
JP (1) JP2011038761A (fr)
KR (1) KR20110016830A (fr)
DE (1) DE102009037375B3 (fr)
RU (1) RU2010133110A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5854638B2 (ja) * 2011-05-19 2016-02-09 株式会社ミクニ グロープラグ
JP6370663B2 (ja) * 2014-10-09 2018-08-08 日本特殊陶業株式会社 グロープラグ
US20180112873A1 (en) * 2015-04-15 2018-04-26 Bosch Corporation Glow plug
DE102016114929B4 (de) * 2016-08-11 2018-05-09 Borgwarner Ludwigsburg Gmbh Druckmessglühkerze

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005090865A1 (fr) 2004-03-16 2005-09-29 Robert Bosch Gmbh Bougie a crayon de prechauffage monte de façon elastique

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE658420C (de) * 1936-04-04 1938-04-02 Fritz Zeiss Dipl Ing Zuendkerze und Gluehkerze fuer luftgekuehlte Verbrennungsmotoren
US4499366A (en) * 1982-11-25 1985-02-12 Nippondenso Co., Ltd. Ceramic heater device
DE3837128C2 (de) * 1987-11-05 1993-11-18 Hitachi Metals Ltd Glühkerze für Dieselmotoren
US6575138B2 (en) * 1999-10-15 2003-06-10 Westport Research Inc. Directly actuated injection valve
AT5153U1 (de) * 2001-03-22 2002-03-25 Avl List Gmbh Optischer sensor zur erfassung von verbrennungsvorgängen
AU2004235350B8 (en) * 2003-04-24 2013-03-07 Shell Internationale Research Maatschappij B.V. Thermal processes for subsurface formations
JP4316474B2 (ja) * 2004-11-02 2009-08-19 株式会社デンソー 燃焼室圧力検出装置
DE102005016463A1 (de) * 2005-04-11 2006-10-12 Robert Bosch Gmbh Glühstiftkerze mit integriertem Druckmesselement
DE102005061879A1 (de) * 2005-12-23 2007-07-05 Robert Bosch Gmbh Glühstiftkerze
JP2007309916A (ja) * 2006-04-20 2007-11-29 Denso Corp 燃焼圧センサ
JP2008020176A (ja) * 2006-06-14 2008-01-31 Ngk Spark Plug Co Ltd センサ内蔵グロープラグ

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005090865A1 (fr) 2004-03-16 2005-09-29 Robert Bosch Gmbh Bougie a crayon de prechauffage monte de façon elastique

Also Published As

Publication number Publication date
US20110062136A1 (en) 2011-03-17
DE102009037375B3 (de) 2011-03-03
KR20110016830A (ko) 2011-02-18
JP2011038761A (ja) 2011-02-24
US8389904B2 (en) 2013-03-05
RU2010133110A (ru) 2012-02-20
EP2284444A3 (fr) 2012-01-04

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