EP2306089A2 - Bougie de préchauffage destinée à relier une pointe en céramique avec une enveloppe métallique - Google Patents

Bougie de préchauffage destinée à relier une pointe en céramique avec une enveloppe métallique Download PDF

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Publication number
EP2306089A2
EP2306089A2 EP10008411A EP10008411A EP2306089A2 EP 2306089 A2 EP2306089 A2 EP 2306089A2 EP 10008411 A EP10008411 A EP 10008411A EP 10008411 A EP10008411 A EP 10008411A EP 2306089 A2 EP2306089 A2 EP 2306089A2
Authority
EP
European Patent Office
Prior art keywords
glow plug
metal sleeve
tapered portion
tapered
pin
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Withdrawn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
EP10008411A
Other languages
German (de)
English (en)
Other versions
EP2306089A3 (fr
Inventor
Yue Dr. Cheng
Hans Peter Kasimirski
Helmut Müller
Drazen Sajatovic
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 EP2306089A2 publication Critical patent/EP2306089A2/fr
Publication of EP2306089A3 publication Critical patent/EP2306089A3/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Withdrawn legal-status Critical Current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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • H05B3/141—Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49083—Heater type

Definitions

  • the invention relates to a glow plug with the features specified in the preamble of claim 1.
  • Such a glow plug is from the DE 10 2006 016 566 A1 known.
  • a metal sleeve and a glow plug and inner conductor and glow plug are soldered together. There is a risk that form solder bridges, which lead to short circuits.
  • the object of the invention is how the production of a glow plug of the type mentioned simplifies and short circuits can be better avoided.
  • the glow plug is pressed into the metal sleeve.
  • a reliable and robust connection between the ceramic glow plug and the metal sleeve can be created inexpensively.
  • a simple and inexpensive production of the glow plug and an improvement of the centric position, coaxiality and theIntern beauhaltmaschine allows in this way.
  • the risk of short circuits through solder bridges can be avoided.
  • an increased life can be achieved with a glow plug according to the invention.
  • a non-uniform wetting with solder material can cause shear forces that cause cracks because of different thermal expansion coefficients of metal sleeve, solder material and glow plug. Temperature-related stresses and the risk of cracking associated therewith can advantageously be prevented according to the invention. It is also advantageous that, during operation, the combustion chamber pressure acts in the press-fit direction and therefore stabilizes the press fit.
  • the ceramic glow plug preferably has a ceramic inner conductor and a ceramic outer conductor, between which a ceramic insulator is arranged.
  • a glow plug can be produced inexpensively, for example, by firing an extruded green body.
  • the metal sleeve can be advantageously used to contact the outer conductor, so that it can be placed on the plug housing to ground.
  • a ceramic glow plug may be used, which has a metallic heating conductor, which is embedded in a ceramic body.
  • An advantageous development of the invention provides that at least one annular elevation a local increase in the pressing pressure between the tapered portion of the metal sleeve and the covered portion of the glow plug causes.
  • the annular protrusion may be provided on an inner surface of the metal shell or on the glow plug.
  • an annular elevation locally increased force between the metal sleeve and the glow plug can be effected.
  • an improved seal between glow plug and metal sleeve can be achieved in this way. This is particularly advantageous in Druckmessglühkerzen as seepage of gases from the combustion chamber should be avoided as possible and therefore a dense connection of the glow plug with the metal sleeve is desirable.
  • Another advantage of one or more annular bumps is that the end edge of the metal sleeve presses on the glow plug with less force. As a result, the risk of damage to the glow plug during pressing can be advantageously reduced.
  • the tapered portion of the glow plug preferably has a circular cross section.
  • the tapering section of the glow plug can also be shaped like an edged, for example similar to a pyramid.
  • the tapered portion of the metal sleeve and the tapered portion of the glow plug may be conically shaped, so have the shape of a truncated cone.
  • a concave shape can also be selected.
  • the glow plug in its tapered portion having a concave in longitudinal section surface, which can be pressed, for example, in a conically shaped end portion of the metal sleeve. Due to the concave shape, the angle of the contact surface can be continuously changed during the pressing in, thus reducing the risk of damage to the glow plug.
  • a concave surface can be achieved in a glow pencil, for example by grinding machining.
  • the tapered portion of the glow plug is tapered, an angle of 5 ° to 10 ° is preferred for the taper of the conical taper with respect to the longitudinal direction.
  • This range for the quotient of the decrease of the radius in the conically tapering section and the length of the tapered section is also preferred for glow plugs, wherein the tapered portion is not conically shaped, but for example, is concave shaped and / or has annular elevations.
  • the decrease of the radius is the difference between the radius at the beginning of the glow plug section covered by the tapered end section of the metal sleeve and the radius at the rear end of the glow plug section covered by the metal sleeve.
  • the tapered portion of the metal shell is preferably at least as long as the diameter of the metal shell at its widest point.
  • the present invention further relates to a method for connecting a functional ceramic ceramic stylus to a metal sleeve having a tapered end portion, the pin having a tapered portion being press-fitted into the metal sleeve such that the tapered portion of the stylus is tapered tapered end portion of the metal sleeve is covered. It is sufficient if a part of the tapered portion of the pin is covered by the sleeve.
  • the pressed-in pin is preferably a ceramic glow plug, but may for example also belong to a gas or temperature sensor.
  • the ceramic pin is pressed into a heated metal sleeve.
  • the press-in force can be advantageously reduced.
  • the metal sleeve then cools and contracts it is advantageous to increase the holding force and thus an improved seal between the pin and metal sleeve.
  • the side facing the combustion chamber during operation is referred to as the front side and the side facing away from the combustion chamber in operation as the rear side of a component.
  • FIG. 1 schematically an embodiment of a glow plug is shown in a partially sectioned view.
  • the glow plug has a metallic housing 1 with an external thread 2 and a hexagon 3.
  • a metallic inner conductor 4 is arranged, which is connected to the rear end of a ceramic glow pin 5 facing away from the combustion chamber.
  • the ceramic glow plug 5 is pressed into a metal sleeve 6, which is inserted in the housing 1.
  • the glow plug 5 protrudes with its two ends out of the metal sleeve 6 and has at its front, the combustion chamber end of a glow tip 7 on.
  • the metal sleeve 6 is preferably pressed into the housing, but may for example also be soldered or welded to the housing 1.
  • the rod-shaped metallic inner conductor 4 has at its front end an opening into which the rear end of the glow plug 5 protrudes.
  • the rear end of the glow plug 5 is pressed into the inner conductor 4. But it is also possible to solder the inner conductor 4 with the glow plug.
  • the ceramic glow plug 5 consists in the illustrated embodiment of a ceramic inner conductor 8 and a ceramic outer conductor 9, between which a ceramic insulator 10 is arranged.
  • the ceramic inner conductor 8 and the ceramic outer conductor 9 are electrically conductively connected to each other by a ceramic heating resistor on the glow tip 7.
  • the metal sleeve 6 electrically contacts the outer conductor 9 of the glow plug 5 and can be connected via the housing 1 to ground potential. In the illustrated embodiment, therefore, the metal sleeve 6 is both the contact tube and the protective tube.
  • FIG. 1 The front end of the glow plug 5 with the glow tip 7 is in FIG. 1 shown only schematically.
  • the glow plug 5 in the region of the glow tip 7 has a reduced diameter, as in FIG. 2 is shown, which shows an embodiment of a metal sleeve 6 with pressed glow pin 5 and metallic inner conductor 4.
  • the metal sleeve 6 has at its rear end a tapered portion 6 a, which encloses a tapered portion 5 a of the glow plug 5.
  • the tapered portion 5a is the illustrated embodiment, an end portion of the glow plug 5 and therefore also causes an advantageous large contact surface of the inner conductor 8 of the glow plug 5 with the metallic inner conductor 4.
  • the inner conductor 8 of the glow plug 5 is located with this contact surface on the metallic inner conductor 4th at.
  • FIG. 3 shows the front end of the metallic inner conductor 4 with the glow plug 5 receiving opening in detail.
  • the glow tip 7 of in FIG. 2 illustrated embodiment has an outer diameter of 3.3 mm.
  • the chamfer angle of the section 5a of the glow plug 5 and the end portion 6a of the metal shell 6 is about 7 ° in each case.
  • the illustrated metal sleeve 6 has a maximum inner diameter of 3.4 mm and a wall thickness of 0.4 mm to 0.6 mm, for example 0.5 mm.
  • the glow plug 5 was centrally pressed into the metal sleeve 6 with a force of about 2 to 2.5 kN.
  • the metal sleeve 6 was heated prior to pressing, so that it shrunk thermally on the glow plug 5 when cooling and so the holding force was increased.
  • FIG. 4 shows a detailed view FIG. 2 , In this detail view, the front end of the metal sleeve 6 is shown. It can be seen that the metal sleeve 6 is compressed in a front end region, for example crimped. The diameter of the glow plug 5 increases behind the compressed end region, for example by 0.1 mm to 0.5 mm. If the glow plug 5 should break in the metal sleeve 6, therefore falling out of a broken Glühuns can be prevented from the metal sleeve 6, since the compressed point of the sleeve 6 with the, preferably stepped, diameter extension of the glow plug 5 form a positive connection. In the illustrated embodiment, the metal sleeve 6 is compressed at its front end. However, in order to fulfill the above-described holding function, the metal shell 6 may be compressed at a position spaced from the front end but lying in the front end portion.
  • the tapered end portion 6a of the metal shell 6 and the portion of the glow plug 5 covered by it may be conically shaped.
  • An example of a conically shaped end portion 6a of the metal shell 6 is shown in FIG FIG. 5 shown.
  • the chamfer angle of the end portion 6a is preferably between 5 ° and 10 °.
  • the metal sleeve 6 may have one or more cuts at its rear end. A corresponding embodiment is in FIG. 6 shown.
  • the load on the glow plug 5 can also be reduced by the metal sleeve 6 having a reduced wall thickness at its rear end.
  • the wall thickness can be uniform, in particular reduce linearly in the tapered end portion 6a. It is also possible that the Wall thickness in the tapered end portion 6a gradually or continuously but non-linearly reduced.
  • FIG. 7 the end portion of a further embodiment of a metal sleeve 6 is shown.
  • the tapered end portion 6a of the metal shell 6 has on its inside a plurality of annular elevations 11, which cause a local increase in the pressing pressure between the end portion 6a of the metal sleeve 6 and the covered portion of the glow plug 5.
  • an improved tightness between the metal sleeve 6 and the glow plug 5 is effected in this way.
  • FIG. 8 shows the end portion of another embodiment of a metal sleeve.
  • the tapered end portion of the metal sleeve on its inside only a single annular elevation 11.
  • This annular elevation 11 reduces stress peaks at the rear end of the metal sleeve 6
  • FIG. 8 illustrated annular elevation was generated as a constriction on the metal sleeve.
  • FIGS. 7 and 8 illustrated embodiments may be additionally provided at its rear end with one or two cuts 12, as in relation to FIG. 6 was explained.
  • the metal sleeve 6 at its rear end have a reduced wall thickness.
  • the angle of the glow plug 5 smaller than the angle of the metal shell 6, it is achieved that the ratio of the inner radius of the metal shell 6 at the beginning of the tapered end portion 6a to the inner radius at the rear end of the metal shell 6 is greater than the ratio before being pressed the radii of the glow plug 5 is at the two corresponding points at which abut the beginning of the tapered end portion 6a and the end of the metal sleeve 6 after pressing.
  • FIG. 9 A corresponding embodiment of a glow plug is shown schematically in FIG FIG. 9 shown. For clarity, the contours are in FIG. 9 not to scale, but clearly exaggerated. The region 5a 'covered by the end portion 6a of the metal shell 6 is in FIG. 9 hatched highlighted.
  • a cone which affects the end points of the annular regions of the glow plug 5 at the beginning and at the end of the section 6a covered by the end section 6a metal sleeve 6 ', then has a chamfer angle between 5 ° and 10 °.
  • FIG. 10 shows examples of the course of the prevailing between the metal sleeve 6 and the glow plug 5 pressure in the tapered end portion 6a of the metal sleeve 6th
  • the pressure in MPa is plotted over the distance of the end section 6a in arbitrary units.
  • the rear end of the metal shell 6 gives the zero point of the X-axis, the front end of the tapered portion of the metal shell the value 4 on the X-axis.
  • the curve A describes the pressure curve for a metal sleeve 6 with a conically shaped end portion 6a according to FIG. 5 in which a glow plug 5 is pressed, the end portion of which tapers at the same angle.
  • the curve B shows a force curve for a glow plug 5, which according to the in FIG. 9 illustrated embodiment in a region 5a ', which is covered by the end portion 6a of the metal sleeve 6, a concave in longitudinal section surface. This glow plug 5 was pressed into a metal sleeve 6, which tapers conically less quickly towards its end, as shown by FIG. 9 was explained.
  • the curve C indicates the pressure curve for a metal sleeve 6, which has recesses 12 in its end portion 6a, to avoid pressure peaks. Unlike the in FIG. 6 illustrated embodiment while recesses 12 were provided at both ends of the tapered end portion 6a.
  • FIG. 11 shows an embodiment for connecting the glow plug 5 to the metallic conductor 4 of the glow plug.
  • a contact pin 13 can be placed on the tip of the glow plug 5, which is connected via a plug connection to the inner conductor 4, as shown schematically in FIG FIG. 11 is shown.
  • the contact pin 13 can be advantageously placed on the glow plug 5, after which it was pressed into the metal sleeve 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)
  • Spark Plugs (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
EP10008411A 2009-09-30 2010-08-12 Bougie de préchauffage destinée à relier une pointe en céramique avec une enveloppe métallique Withdrawn EP2306089A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009048643A DE102009048643B4 (de) 2009-09-30 2009-09-30 Glühkerze und Verfahren zum Verbinden eines Stifts aus einer Funktionskeramik mit einer Metallhülse

Publications (2)

Publication Number Publication Date
EP2306089A2 true EP2306089A2 (fr) 2011-04-06
EP2306089A3 EP2306089A3 (fr) 2012-01-18

Family

ID=43428490

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10008411A Withdrawn EP2306089A3 (fr) 2009-09-30 2010-08-12 Bougie de préchauffage destinée à relier une pointe en céramique avec une enveloppe métallique

Country Status (5)

Country Link
US (1) US8471180B2 (fr)
EP (1) EP2306089A3 (fr)
KR (1) KR101674368B1 (fr)
DE (1) DE102009048643B4 (fr)
RU (1) RU2010139807A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014206845A1 (fr) * 2013-06-26 2014-12-31 Robert Bosch Gmbh Bougie de préchauffage
EP3064834A4 (fr) * 2013-10-28 2017-06-21 Kyocera Corporation Dispositif de chauffage et bougie de préchauffage

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010060616A2 (fr) * 2008-11-27 2010-06-03 Borgwarner Beru Systems Gmbh Bougie de préchauffage et son procédé de fabrication
JP6154652B2 (ja) * 2013-04-16 2017-06-28 日本特殊陶業株式会社 燃焼圧センサ付きグロープラグ
DE102013212298A1 (de) * 2013-06-26 2014-12-31 Robert Bosch Gmbh Glühstiftkerze
DE102013112806B4 (de) * 2013-11-20 2016-06-23 Borgwarner Ludwigsburg Gmbh Verfahren zum Herstellen einer Glühkerze
JP6204566B2 (ja) * 2014-02-26 2017-09-27 京セラ株式会社 ヒータおよびグロープラグ
US10514017B2 (en) 2017-03-21 2019-12-24 Pratt & Whitney Canada Corp. Internal combustion engine with igniter cooling sleeve

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006016566A1 (de) 2005-09-22 2007-03-29 Beru Ag Zusammengesetzter Leiter, insbesondere für Glühkerzen für Dieselmotoren

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JPS5952726B2 (ja) * 1981-06-24 1984-12-21 日本特殊陶業株式会社 シ−ズ型グロ−プラグの取付金具にグロ−チュ−ブを接合する方法
JPH07103478A (ja) * 1993-10-04 1995-04-18 Nippondenso Co Ltd グロープラグ
US5880432A (en) * 1996-12-23 1999-03-09 Le-Mark International Ltd. Electric heating device with ceramic heater wedgingly received within a metalic body
DE69827571T2 (de) * 1997-09-19 2006-01-05 Denso Corp., Kariya Glühkerze
JP3880275B2 (ja) * 2000-02-29 2007-02-14 日本特殊陶業株式会社 セラミックヒータ及びそのセラミックヒータを用いたグロープラグ
JP3589206B2 (ja) * 2000-10-17 2004-11-17 株式会社ボッシュオートモーティブシステム セラミックスヒータ型グロープラグおよびその製造方法。
JP4632565B2 (ja) * 2001-03-09 2011-02-16 日本特殊陶業株式会社 セラミックヒーター装置及びその製造方法
JP4562315B2 (ja) * 2001-06-07 2010-10-13 日本特殊陶業株式会社 セラミックヒータ、セラミックヒータの製造方法及びグロープラグ
JP2003130349A (ja) * 2001-10-24 2003-05-08 Denso Corp グロープラグ
JP2003166715A (ja) * 2001-11-30 2003-06-13 Ngk Spark Plug Co Ltd グロープラグ
JP4093175B2 (ja) * 2003-11-17 2008-06-04 株式会社デンソー グロープラグ
JP2005180855A (ja) * 2003-12-22 2005-07-07 Bosch Automotive Systems Corp セラミックスヒータ型グロープラグ
DE102005051817B4 (de) * 2005-10-28 2008-06-05 Beru Ag Druckmessglüheinrichtung, insbesondere Druckmessglühkerze

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006016566A1 (de) 2005-09-22 2007-03-29 Beru Ag Zusammengesetzter Leiter, insbesondere für Glühkerzen für Dieselmotoren

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014206845A1 (fr) * 2013-06-26 2014-12-31 Robert Bosch Gmbh Bougie de préchauffage
EP3064834A4 (fr) * 2013-10-28 2017-06-21 Kyocera Corporation Dispositif de chauffage et bougie de préchauffage

Also Published As

Publication number Publication date
DE102009048643A1 (de) 2011-03-31
KR101674368B1 (ko) 2016-11-22
EP2306089A3 (fr) 2012-01-18
US20120043309A1 (en) 2012-02-23
US8471180B2 (en) 2013-06-25
DE102009048643B4 (de) 2013-11-28
RU2010139807A (ru) 2012-04-10
KR20110035958A (ko) 2011-04-06

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