EP2719037A1 - Électrode pour une bougie d'allumage ainsi que procédé pour sa fabrication - Google Patents

Électrode pour une bougie d'allumage ainsi que procédé pour sa fabrication

Info

Publication number
EP2719037A1
EP2719037A1 EP12714689.2A EP12714689A EP2719037A1 EP 2719037 A1 EP2719037 A1 EP 2719037A1 EP 12714689 A EP12714689 A EP 12714689A EP 2719037 A1 EP2719037 A1 EP 2719037A1
Authority
EP
European Patent Office
Prior art keywords
electrode
metal element
noble metal
weld
base material
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
EP12714689.2A
Other languages
German (de)
English (en)
Other versions
EP2719037B1 (fr
Inventor
Thomas Kretschmar
Andreas Benz
Jochen Fischer
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=45974336&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2719037(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2719037A1 publication Critical patent/EP2719037A1/fr
Application granted granted Critical
Publication of EP2719037B1 publication Critical patent/EP2719037B1/fr
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
    • H01T13/39—Selection of materials for electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T21/00—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs
    • H01T21/02—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs of sparking plugs

Definitions

  • the present invention relates to an electrode for a spark plug and a method of manufacturing the same, wherein excellent durability of a noble metal element on an electrode base material is provided.
  • the electrode according to the invention with the features of claim 1 has the advantage that an amount of noble metal for the electrode can be significantly reduced. According to the invention is now a
  • the noble metal material is fused to the electrode base material in the weld. This will ensure that the weld does not become excessively thick and sufficient noble metal material is present for a long durability of the spark plug.
  • the noble metal element is a noble metal chip, preferably with a cylindrical shape having a diameter between 0.4 to 2.6 mm.
  • the diameter is preferably between 0.4 to 0.8 mm, preferably 0.5 to 0.7 mm, and particularly preferably about 0.6 mm.
  • the diameter is preferably between 2.2 to 2.6 mm, and is preferably about 2.4 mm.
  • a thickness of the noble metal chip is preferably in a range between 0.2 to 0.7 mm, preferably 0.25 to 0.6 mm, and more preferably about 0.3 mm.
  • the thickness is preferably about 0.3 mm for stationary gas engines
  • Precious metal elements formed. More preferably, a maximum width of the weld in a range of 0, 1 to 0.3 mm, and particularly preferably about 0.2 mm. A maximum depth is preferably in a range of 0.3 to 0.9 mm, and more preferably 0.6 mm.
  • Electrode base material is arranged. Subsequently, the
  • Precious metal element welded to the electrode base material such that an aspect ratio of a depth T of the welded joint to an existing on the outside width B of the welded joint> 3.
  • welding is carried out particularly preferably by means of a laser, in particular a fiber laser. More preferably, the precious metal element is a proportion of
  • Precious metal must be used.
  • Figure 1 is a schematic, partially sectioned side view of a combustion chamber end of a spark plug according to a first embodiment of the invention
  • Figure 2 is a schematic partial plan view of the ground electrode of
  • FIG. 1, Figure 3 is a schematic sectional view of the ground electrode of FIG. 1, Figure 3 is a schematic sectional view of the ground electrode of FIG. 1, Figure 3 is a schematic sectional view of the ground electrode of FIG. 1, Figure 3 is a schematic sectional view of the ground electrode of FIG. 1, Figure 3 is a schematic sectional view of the ground electrode of FIG. 1, Figure 3 is a schematic sectional view of the ground electrode of FIG. 1, Figure 3 is a schematic sectional view of the ground electrode of FIG. 1, Figure 3 is a schematic sectional view of the ground electrode of FIG. 1, Figure 3 is a schematic sectional view of the ground electrode of FIG. 1, Figure 3 is a schematic sectional view of the ground electrode of FIG. 1, Figure 3 is a schematic sectional view of the ground electrode of FIG. 1, Figure 3 is a schematic sectional view of the ground electrode of FIG. 1, Figure 3 is a schematic sectional view of the ground electrode of FIG. 1, Figure 3 is a schematic sectional view of the ground electrode of FIG. 1, Figure 3 is a schematic sectional view of the ground electrode
  • FIG. 4 shows a schematic sectional view of a ground electrode according to a second exemplary embodiment of the invention
  • Figure 5 is a schematic sectional view of a ground electrode according to a third embodiment of the invention.
  • FIG. 6 shows a schematic sectional view of a ground electrode according to a fourth exemplary embodiment of the invention
  • the electrode according to the invention is the ground electrode 2. It should be noted, however, that the electrode according to the invention may also be the center electrode 3 or both electrodes may be embodied in accordance with the invention.
  • the ground electrode 2 has a surface 20 which is directed to the other electrode and is arranged perpendicular to the central axis X-X.
  • the center electrode 3 has a surface 30 which is directed towards the ground electrode and is also aligned perpendicular to the central axis X-X.
  • the ground electrode 2 comprises an electrode base material 4 made of one
  • the ground electrode 2 comprises a noble metal element 5, which by means of a welded joint 6 is fixed to the electrode base material 4.
  • the noble metal element 5 is a ball in this embodiment, and the welded joint 6 is annularly formed around the ball, as shown in FIG.
  • the welded joint 6 is formed such that the welded joint 6 in the axial direction X-X has a maximum depth T, i. maximum extent of the weld parallel to the central axis X-X. Parallel to the surface 20, the welded joint 6 also has a maximum width B at the surface (see also Figure 2).
  • Precious metal volume (more than 80% in this embodiment), whereby a very high durability of the spark plug is obtained with minimal use of precious metal.
  • Electron base material 4 is made in one step before the ground electrode 2 is bent by 90 °.
  • An original diameter of the spherical precious metal element was 0.5 mm.
  • the method according to the invention thus makes it possible, in particular, to use a fiber laser that obtains a very exact weld seam with a very constant width and a very constant extent in the axial direction XX of the spark plug can be.
  • a fiber laser instead of a fiber laser, another laser can be used for welding.
  • the present invention surprisingly demonstrates a way in which precious metal can be saved in spark plugs without thereby reducing the durability of the spark plug.
  • FIGS 4 to 6 show alternative embodiments of the invention, wherein identical or functionally identical parts are denoted by the same reference numerals as in the first embodiment.
  • Figure 4 shows the use of a platelet of precious metal as
  • the noble metal chip is formed as a smaller cylinder and welded to the electrode base material 4 by means of a welded joint 6. While in the first embodiment in Figures 1 to 3 approximately a depth of the weld in the axial direction X-X axial
  • Embodiment as a noble metal element 50 uses a noble metal plate. However, the main welding direction is at the third
  • Embodiment no longer as in the second embodiment substantially parallel to the central axis XX, but at an angle ⁇ of about 40 ° selected.
  • a funnel-shaped welded joint 6 is obtained, which lies partially below the noble metal element 50.
  • an aspect ratio T / B> 3 wherein the width B of the welded joint 6 is given by a projection of the maximum radial to the central axis XX directed propagation of the weld 6 at the surface.
  • Figure 6 shows a fourth embodiment of the invention, wherein the
  • the weld joint 60 is made such that it does not leak out of the noble metal element 5 on the surface 20 facing the center electrode. This results in a particularly large area of the noble metal element 5, which is directed to the center electrode.
  • the welded joint 60 of this embodiment is formed in the center axis X-X of the spark plug and is slightly tapered toward the
  • a width B of the fourth embodiment corresponds to a diameter of the welded joint 60 at the
  • the fourth embodiment further has the advantage that a punctiform
  • an improved electrode for spark plugs can be provided, which has a very high durability despite lower precious metal use. It can also be ensured according to the invention that a weld seam is kept relatively small.
  • noble metal elements with a volume in the range of 0.015 to 0.2 mm 3 are weldable, wherein 50% or less of

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Spark Plugs (AREA)

Abstract

L'invention concerne une électrode pour une bougie d'allumage, comprenant un matériau de base (4) de l'électrode et un élément de métal noble (5 ; 50), l'élément de métal noble (5 ; 50) étant fixé par une soudure (6 ; 60) au matériau de base (4) de l'électrode. La soudure présente une étendue maximale (T) perpendiculairement à une surface (20) de l'électrode, à laquelle l'élément de métal noble est fixé et une largeur maximale (B) sur la surface (20). Le rapport de l'étendue maximale (T) à la largeur maximale (B) est supérieur ou égal à 3.
EP12714689.2A 2011-06-09 2012-04-12 Électrode pour une bougie d'allumage ainsi que procédé pour sa fabrication Revoked EP2719037B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110077279 DE102011077279A1 (de) 2011-06-09 2011-06-09 Elektrode für eine Zündkerze sowie Verfahren zu deren Herstellung
PCT/EP2012/056643 WO2012167972A1 (fr) 2011-06-09 2012-04-12 Électrode pour une bougie d'allumage ainsi que procédé pour sa fabrication

Publications (2)

Publication Number Publication Date
EP2719037A1 true EP2719037A1 (fr) 2014-04-16
EP2719037B1 EP2719037B1 (fr) 2015-10-21

Family

ID=45974336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12714689.2A Revoked EP2719037B1 (fr) 2011-06-09 2012-04-12 Électrode pour une bougie d'allumage ainsi que procédé pour sa fabrication

Country Status (7)

Country Link
US (1) US9263856B2 (fr)
EP (1) EP2719037B1 (fr)
JP (1) JP5965997B2 (fr)
CN (1) CN103582985B (fr)
DE (1) DE102011077279A1 (fr)
ES (1) ES2552519T3 (fr)
WO (1) WO2012167972A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101855020B1 (ko) 2014-05-15 2018-05-04 니뽄 도쿠슈 도교 가부시키가이샤 스파크 플러그
JP5956514B2 (ja) 2014-06-30 2016-07-27 日本特殊陶業株式会社 スパークプラグ
JP5956513B2 (ja) 2014-06-30 2016-07-27 日本特殊陶業株式会社 スパークプラグ
JP6243476B2 (ja) 2016-05-24 2017-12-06 日本特殊陶業株式会社 スパークプラグ及びその製造方法
JP6177968B1 (ja) * 2016-06-27 2017-08-09 日本特殊陶業株式会社 スパークプラグ
DE102018110580A1 (de) 2018-05-03 2019-11-07 Man Energy Solutions Se Zündkerze für eine Brennkraftmaschine
DE102018110571A1 (de) 2018-05-03 2019-11-07 Man Energy Solutions Se Zündkerze für eine Brennkraftmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003217792A (ja) 2002-01-17 2003-07-31 Denso Corp スパークプラグおよびその製造方法
JP2004095214A (ja) 2002-08-29 2004-03-25 Ngk Spark Plug Co Ltd スパークプラグ及びスパークプラグの製造方法
JP2010238499A (ja) 2009-03-31 2010-10-21 Ngk Spark Plug Co Ltd スパークプラグ

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0645049A (ja) * 1992-07-22 1994-02-18 Ngk Spark Plug Co Ltd スパークプラグ電極の製造方法
US6791194B1 (en) * 1996-05-30 2004-09-14 Hitachi, Ltd. Circuit tape having adhesive film, semiconductor device, and a method for manufacturing the same
JP3121309B2 (ja) * 1998-02-16 2000-12-25 株式会社デンソー 内燃機関用のスパークプラグ
JP3361479B2 (ja) * 1999-04-30 2003-01-07 日本特殊陶業株式会社 スパークプラグの製造方法
DE10103045A1 (de) * 2001-01-24 2002-07-25 Bosch Gmbh Robert Verfahren zur Herstellung einer Zündkerzenelektrode
JP4271379B2 (ja) 2001-02-08 2009-06-03 株式会社デンソー スパークプラグ
JP2002280145A (ja) * 2001-03-19 2002-09-27 Ngk Spark Plug Co Ltd スパークプラグ及びその製造方法
JP4069826B2 (ja) * 2003-07-30 2008-04-02 株式会社デンソー スパークプラグおよびその製造方法
US7557495B2 (en) 2005-11-08 2009-07-07 Paul Tinwell Spark plug having precious metal pad attached to ground electrode and method of making same
US7923909B2 (en) * 2007-01-18 2011-04-12 Federal-Mogul World Wide, Inc. Ignition device having an electrode with a platinum firing tip and method of construction
JP2008204917A (ja) * 2007-02-22 2008-09-04 Ngk Spark Plug Co Ltd スパークプラグ及びスパークプラグの製造方法
EP2020713B1 (fr) 2007-08-01 2011-03-23 NGK Spark Plug Co., Ltd. Bougie pour moteur à combustion interne et son procédé de fabrication
JP4617388B1 (ja) 2009-08-03 2011-01-26 日本特殊陶業株式会社 スパークプラグ
JP4928596B2 (ja) * 2009-12-04 2012-05-09 日本特殊陶業株式会社 スパークプラグ及びその製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003217792A (ja) 2002-01-17 2003-07-31 Denso Corp スパークプラグおよびその製造方法
JP2004095214A (ja) 2002-08-29 2004-03-25 Ngk Spark Plug Co Ltd スパークプラグ及びスパークプラグの製造方法
JP2010238499A (ja) 2009-03-31 2010-10-21 Ngk Spark Plug Co Ltd スパークプラグ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2012167972A1

Also Published As

Publication number Publication date
JP2014519169A (ja) 2014-08-07
US9263856B2 (en) 2016-02-16
CN103582985B (zh) 2019-01-15
JP5965997B2 (ja) 2016-08-10
WO2012167972A1 (fr) 2012-12-13
ES2552519T3 (es) 2015-11-30
EP2719037B1 (fr) 2015-10-21
CN103582985A (zh) 2014-02-12
DE102011077279A1 (de) 2012-12-13
US20140203701A1 (en) 2014-07-24

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