EP2719037A1 - Elektrode für eine zündkerze sowie verfahren zu deren herstellung - Google Patents
Elektrode für eine zündkerze sowie verfahren zu deren herstellungInfo
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000000034 method Methods 0.000 title claims description 6
- 239000000463 material Substances 0.000 claims abstract description 30
- 239000010970 precious metal Substances 0.000 claims abstract description 27
- 229910000510 noble metal Inorganic materials 0.000 claims description 44
- 238000003466 welding Methods 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 5
- 239000007769 metal material Substances 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011077279.0A DE102011077279B4 (de) | 2011-06-09 | 2011-06-09 | Elektrode für eine Zündkerze sowie Verfahren zu deren Herstellung |
PCT/EP2012/056643 WO2012167972A1 (de) | 2011-06-09 | 2012-04-12 | Elektrode für eine zündkerze sowie verfahren zu deren herstellung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2719037A1 true EP2719037A1 (de) | 2014-04-16 |
EP2719037B1 EP2719037B1 (de) | 2015-10-21 |
Family
ID=45974336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12714689.2A Revoked EP2719037B1 (de) | 2011-06-09 | 2012-04-12 | Elektrode für eine zündkerze sowie verfahren zu deren herstellung |
Country Status (7)
Country | Link |
---|---|
US (1) | US9263856B2 (de) |
EP (1) | EP2719037B1 (de) |
JP (1) | JP5965997B2 (de) |
CN (1) | CN103582985B (de) |
DE (1) | DE102011077279B4 (de) |
ES (1) | ES2552519T3 (de) |
WO (1) | WO2012167972A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9887518B2 (en) | 2014-05-15 | 2018-02-06 | Ngk Spark Plug Co., Ltd. | Spark plug |
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 |
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 |
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)
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)
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 (de) * | 2007-08-01 | 2011-03-23 | NGK Spark Plug Co., Ltd. | Zündkerze für Verbrennungsmotoren und Verfahren zu ihrer Herstellung |
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 |
-
2011
- 2011-06-09 DE DE102011077279.0A patent/DE102011077279B4/de active Active
-
2012
- 2012-04-12 EP EP12714689.2A patent/EP2719037B1/de not_active Revoked
- 2012-04-12 CN CN201280028188.XA patent/CN103582985B/zh active Active
- 2012-04-12 US US14/125,044 patent/US9263856B2/en active Active
- 2012-04-12 JP JP2014513952A patent/JP5965997B2/ja active Active
- 2012-04-12 WO PCT/EP2012/056643 patent/WO2012167972A1/de active Application Filing
- 2012-04-12 ES ES12714689.2T patent/ES2552519T3/es active Active
Patent Citations (3)
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)
Title |
---|
See also references of WO2012167972A1 |
Also Published As
Publication number | Publication date |
---|---|
EP2719037B1 (de) | 2015-10-21 |
ES2552519T3 (es) | 2015-11-30 |
DE102011077279B4 (de) | 2024-08-22 |
DE102011077279A1 (de) | 2012-12-13 |
JP5965997B2 (ja) | 2016-08-10 |
CN103582985A (zh) | 2014-02-12 |
JP2014519169A (ja) | 2014-08-07 |
WO2012167972A1 (de) | 2012-12-13 |
CN103582985B (zh) | 2019-01-15 |
US9263856B2 (en) | 2016-02-16 |
US20140203701A1 (en) | 2014-07-24 |
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