EP3552283A1 - Électrode de bougie d'allumage, bougie d'allumage et procédé de fabrication d'une électrode de bougie d'allumage - Google Patents

Électrode de bougie d'allumage, bougie d'allumage et procédé de fabrication d'une électrode de bougie d'allumage

Info

Publication number
EP3552283A1
EP3552283A1 EP17784914.8A EP17784914A EP3552283A1 EP 3552283 A1 EP3552283 A1 EP 3552283A1 EP 17784914 A EP17784914 A EP 17784914A EP 3552283 A1 EP3552283 A1 EP 3552283A1
Authority
EP
European Patent Office
Prior art keywords
electrode
spark plug
mass
core
electrode core
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
EP17784914.8A
Other languages
German (de)
English (en)
Other versions
EP3552283B1 (fr
Inventor
Mario Fleischhauer
Manfred Roeckelein
Alexander Schramm
Gabriel PETERSEN
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 EP3552283A1 publication Critical patent/EP3552283A1/fr
Application granted granted Critical
Publication of EP3552283B1 publication Critical patent/EP3552283B1/fr
Active 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
    • H01T13/02—Details
    • H01T13/16—Means for dissipating heat
    • 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
    • H01T13/32—Sparking plugs characterised by features of the electrodes or insulation characterised by features of the earthed electrode
    • 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 a spark plug electrode having improved connectability with a component of a spark plug and a spark plug having a spark plug electrode permanently stably connected. Moreover, the present invention also relates to a method for producing a
  • a spark plug electrode comprises an electrode core with high thermal conductivity and an electrode jacket surrounding the electrode core, the electrode core being exposed to the electrode base prior to connection to a component of the spark plug.
  • the material of the electrode sheath is selected for high corrosion resistance and erosion resistance.
  • thermally conductive electrode core flows and transmits to surrounding areas of the spark plug electrode or to be connected to the spark plug electrode spark plug.
  • the spark plug electrode according to the invention according to claim 1, on the other hand, is distinguished by the fact that a connecting region is provided at the electrode base, which is a removal or a drainage of material from the Spark plug electrode prevents and thus improves the connectivity with another component of a spark plug, in particular by a thermal bonding method, such as preferably welding conditional.
  • a connecting region is provided at the electrode base, which is a removal or a drainage of material from the Spark plug electrode prevents and thus improves the connectivity with another component of a spark plug, in particular by a thermal bonding method, such as preferably welding conditional.
  • the materials of the connection region and the electrode jacket differ.
  • the connection area can be selectively selected with a view to connecting with a component of the spark plug.
  • a kind of protection region is formed, which helps to keep the electrode core in shape and shape during connection with a component of a spark plug. So connecting the
  • Spark plug electrode with a component of the spark plug uncomplicated, even thermally induced, executed without that leaked or leaked electrode core material for interference in the connection formation of the electrode foot with a component of the spark plug provides.
  • Spark plug electrode according to the invention with an electrode core surrounded by an electrode jacket, in addition to a high corrosion and
  • connection region at least partially covers the electrode core at the electrode base.
  • the electrode core is completely covered by the connection area at the electrode base.
  • connection region extends over as large a region as possible at the electrode base. Preferably covers the
  • Connection area thus not only the electrode core but also the
  • the electrode core is formed in particular of a highly thermally conductive material which is capable of, at the
  • Electrode tip during the intended use of the Spark plug electrode occurring in the spark plasma quickly dissipate high heat from the electrode tip.
  • the metals silver and copper not only have a high thermal conductivity, but are also characterized by good processability and affordability at moderate prices.
  • the material of the electrode jacket is preferably formed of a nickel-based alloy with nickel as a main component in mass%.
  • Electrode material can advantageously be achieved in that the nickel-based alloy of the material of the electrode jacket contains chromium in a proportion of at least 20% by weight, in particular of at least 25% by weight.
  • Connecting portion has a thermal conductivity in a temperature range of 400 to 450 ° C, which is higher than that of the material of
  • Electrode sheath In this way, in particular, a thermally induced connection with a component of a spark plug can be improved.
  • the material of the connection region In order to prevent flow of electrode core material particularly well, it is further advantageous for the material of the connection region to have better weldability than that of the material of the electrode core.
  • An improved "weldability" of the material of the connection region is understood to mean that the material of the connection region is more easily thermally activatable and thus also alloyable than that of the electrode core, so that a homogeneous and stable weld can be formed without causing a substantial change in the electrode core Weldability in the sense of the invention also means that the invention
  • Spark plug electrode and a component of the spark plug in compliance with the required characteristics with respect to geometry, weld strength and prevention Of weld spatter, can be connected reproducibly with the existing joining process.
  • Joining region is a low alloy nickel base alloy or a low alloy iron base alloy. These alloys are characterized by a good weldability and in particular by a good connectivity with conventional cladding materials and spark plug materials, so that the spark plug electrode can be very well permanently connected to a stable component of a spark plug. Particularly advantageous, the material of the
  • spark plug comprising a spark plug electrode as described above. By using the spark plug electrode according to the invention this is permanently connected to a stable component of the spark plug. The connection between the spark plug electrode according to the invention
  • Connection area of the spark plug electrode and the attachment area to the component of the spark plug is uniform and stable and not with
  • the spark plug according to the invention is thus characterized not only by a high corrosion and
  • spark plug according to the invention can be the inventive
  • spark plug electrode as a ground electrode and / or as a center electrode.
  • the electrode produced according to the invention has an electrode base and an electrode tip and comprises one
  • An electrode core, an electrode sheath surrounding the electrode core and a connecting portion for connecting the spark plug electrode with a another component of a spark plug According to the method of the invention, a material of the electrode sheath is first provided. In the material of the electrode sheath, a recess is then provided. The depression extends from the electrode foot in the direction of the electrode tip. In this recess, a material of the electrode core is introduced, in such a way that the material of the electrode core fills the recess at least partially. Complete filling of the recess with the material of the electrode core is also possible. Subsequently, material of the connection region is introduced into or onto the recess at least partially filled with the material of the electrode core. This results in a stacked arrangement of
  • connection region covers the electrode core at least partially and in particular completely.
  • the electrode core is thus prevented from draining, erosion or carry over to surrounding areas even when exposed to heat. Consequently, the connection region can be very easily connected to a component of a spark plug without causing a substantial geometric change of the electrode core even when exposed to high temperatures.
  • the process is simple, can be implemented without high technical complexity and allows the production of a
  • the method advantageously comprises a step of reshaping the
  • the forming comprises a step of pressing.
  • Electrode core in particular a frictional connection between The pressed materials produced, which ensures a particularly durable connection formation.
  • a very simple and targeted formable connection between adjacent materials, such as the stacked materials to be arranged of the electrode core and the connection area can be advantageously carried out by extrusion.
  • the method also includes a step of reshaping to match the geometry of the spark plug electrode.
  • the spark plug can be curved. This is particularly advantageous in the manufacture of ground electrodes.
  • Figure 1 is a schematic partial sectional view of a spark plug according to an embodiment of the invention
  • Figure 2 is a schematic sectional view of a spark plug electrode according to an embodiment of the invention
  • Figure 3 is a diagram illustrating a method for
  • the spark plug 1 comprises according to FIG. 1
  • Embodiment a ground electrode 2 and a center electrode 3.
  • Reference numeral 6 denotes an electrical connection nut. From the electrical connection nut 6, an electrically conductive connection via a connecting bolt 7 and a made of a conductive glass connecting element 8 to the center electrode 3 is provided.
  • FIG. 2 shows one of the spark plug electrodes, by way of example a
  • the ground electrode 2 has an electrode tip 9 and an electrode foot 10.
  • the electrode base 10 is the region that can be connected to a component of a spark plug, for example to a housing section, so that the ground electrode 2 becomes an integral part of the spark plug.
  • the electrode tip 9 represents the end of the ground electrode 2 opposite the electrode base 10.
  • the electrode tip 9 is the region where a spark plasma is generated when the ground electrode 2 is used as intended.
  • the electrode tip 9 may further comprise a noble metal pin (not shown) which serves to generate the ignition sparks. But this is not mandatory.
  • the ground electrode 2 comprises an electrode core 1 1, a the
  • connection region 13 covers both the electrode core 1 1 on the electrode base 10 and the electrode
  • Electrode jacket 12 completely. Thus, only material of the connection region 13 is present at the region of the electrode base 10 to be connected to a further component of a spark plug. Both the electrode core 1 1 and the electrode sheath 12 are shielded by the connection region 13 and do not protrude from the electrode foot 10. If the ground electrode 2 at the electrode base 10 is now connected to a component of a spark plug, for example by a welding operation, then only the material of the connection region 13 is used for the connection formation, ie for the formation of the weld seam. The electrode core 1 1 and also the electrode jacket 12 remain unaffected. In particular, the material of the electrode core 1 1 is prevented from flowing off or being carried away by the locally high temperatures prevailing during the welding process, and the electrode core 1 1 remains essentially unchanged in the electrode sheath 12, so that it effectively absorbs the heat which is generated in the
  • Spark plasma acts on the electrode tip 9, from the electrode tip
  • Electrode jacket 12 are different from each other. This allows the
  • the jacket material can be selected with regard to high erosion stability and corrosion stability. This is the material of
  • Electrode jacket 12 in particular made of a nickel-based alloy with nickel as the main component.
  • the material of the electrode sheath may contain chromium with at least 20% by weight, in particular with at least 25% by mass.
  • the material of the connecting portion 13 is preferably a low-alloyed nickel-base alloy or a low-alloyed iron-based alloy. These alloys are characterized by a good weldability and at the same time a high thermal conductivity, wherein the thermal conductivity of the material of the connection region 13 in a temperature range of 400 to 450 ° C is higher than the thermal conductivity of the material of the electrode jacket 12.
  • the electrode core 1 1 is due to a Good thermal conductivity in particular of copper, silver, a copper alloy, wherein a copper content in the Copper alloy is at least 90 mass%, or a silver alloy formed, wherein a silver content in the silver alloy is at least 90 mass%.
  • FIG. 3 shows a diagram for illustrating a method for
  • the spark plug electrode to be produced according to the method is exemplified as a ground electrode 2.
  • a material 14 of the electrode jacket 12 is provided, in which a recess 15 is provided in a method step A.
  • Compress the material 14 of the electrode sheath 12 are produced. Other methods are also conceivable.
  • a material 16 of the electrode core 1 1 is introduced in a method step B.
  • the recess 15 is thus at least partially filled with the material 16 of the electrode core 1 1.
  • step C material 17 of the connection region 13 is introduced into the recess 15 at least partially filled with the material 16 of the electrode core 1 1.
  • step D pressure is applied from the direction of the material 17 of the connection region 13, which is indicated by the arrow P.
  • the material 16 of the electrode core 1 1 is pressed with the material 14 of the electrode sheath 12, so that between the resulting electrode core 1 1 and the electrode sheath 12 in particular a
  • Electrode jacket 12 is permanently fixed.
  • the material 17 of the connecting portion 13 is pressed with the material 16 of the electrode core 1 1, whereby between the electrode core 1 1 and the connection region 13 is also a particular non-positive connection is made.
  • step B even after step B, that is to say after the at least partial filling of the recess 15 with material 16 of the electrode core 11, a step of pressing can follow.
  • a second pressing step as shown in the illustrated embodiment, is then carried out after arranging material 17 of the joining region 13 as shown in step D.
  • Spark plug electrode is exemplified by a ground electrode 2 with a
  • Ground electrode 2 comprises an electrode core 1 1, an electrode sheath 12 surrounding the electrode core 1 1 and a connecting portion 13 for connecting the ground electrode 2 with another spark plug component.
  • the material 14 of the electrode jacket 12 is different from the material 17 of the connection region 13, as it is embodied, for example, with regard to the ground electrode 2 in FIG.
  • the ground electrode 2 can still be reshaped after the pressing in order to adapt the geometry of the ground electrode 2.

Landscapes

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

Abstract

L'invention concerne une électrode de bougie d'allumage (2) pourvue d'une base (10) et d'une extrémité (9), ladite électrode comportant un noyau (11), un enrobage (12) entourant le noyau (11) de l'électrode et une zone de liaison (13) reliant l'électrode (2) à un autre composant de bougie d'allumage. La zone de liaison (13) est située au niveau de la base (10) de l'électrode, et un matériau (17) de la zone de liaison (13) et un matériau (14) de l'enrobage (12) de l'électrode sont différents.
EP17784914.8A 2016-12-08 2017-10-04 Électrode de bougie d'allumage, bougie d'allumage et procédé de fabrication d'une électrode de bougie d'allumage Active EP3552283B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016224502.3A DE102016224502A1 (de) 2016-12-08 2016-12-08 Zündkerzenelektrode, Zündkerze und Verfahren zur Herstellung einer Zündkerzenelektrode
PCT/EP2017/075173 WO2018103912A1 (fr) 2016-12-08 2017-10-04 Électrode de bougie d'allumage, bougie d'allumage et procédé de fabrication d'une électrode de bougie d'allumage

Publications (2)

Publication Number Publication Date
EP3552283A1 true EP3552283A1 (fr) 2019-10-16
EP3552283B1 EP3552283B1 (fr) 2024-05-29

Family

ID=60120026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17784914.8A Active EP3552283B1 (fr) 2016-12-08 2017-10-04 Électrode de bougie d'allumage, bougie d'allumage et procédé de fabrication d'une électrode de bougie d'allumage

Country Status (5)

Country Link
EP (1) EP3552283B1 (fr)
CN (1) CN110140265B (fr)
DE (1) DE102016224502A1 (fr)
ES (1) ES2992082T3 (fr)
WO (1) WO2018103912A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112020002185T5 (de) * 2019-04-30 2022-04-07 Federal-Mogul Ignition Llc Zündkerzenelektrode und verfahren zur herstellung derselben

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3941649A1 (de) * 1989-12-16 1991-06-20 Bosch Gmbh Robert Verfahren zur herstellung von elektroden fuer zuendkerzen sowie zuendkerzen-elektroden
JP4261573B2 (ja) * 2006-11-23 2009-04-30 日本特殊陶業株式会社 スパークプラグ
EP2192661B1 (fr) * 2007-09-18 2017-07-05 NGK Spark Plug Co., Ltd. Bougie d'allumage
JP4939642B2 (ja) * 2010-11-04 2012-05-30 日本特殊陶業株式会社 スパークプラグ
EP2664038B1 (fr) * 2011-01-13 2016-04-27 Federal-Mogul Ignition Company Bougie d'allumage à orientation améliorée de l'électrode de masse et son procédé de formation
JP5260759B2 (ja) * 2012-01-05 2013-08-14 日本特殊陶業株式会社 スパークプラグ
DE102014216403A1 (de) * 2014-08-19 2016-02-25 Robert Bosch Gmbh Masseelektrode und Zündkerze mit Masseelektrode sowie Verfahren zur Herstellung einer Masseelektrode
DE102014226215A1 (de) * 2014-12-17 2016-06-23 Robert Bosch Gmbh Zündkerzenelektrode, Verfahren zu deren Herstellung und Zündkerze

Also Published As

Publication number Publication date
DE102016224502A1 (de) 2018-06-14
EP3552283B1 (fr) 2024-05-29
ES2992082T3 (es) 2024-12-09
WO2018103912A1 (fr) 2018-06-14
CN110140265A (zh) 2019-08-16
CN110140265B (zh) 2020-08-14

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