[go: up one dir, main page]

WO2007051677A1 - Electrode de bougie d'allumage et procede de fabrication d'une electrode de bougie d'allumage - Google Patents

Electrode de bougie d'allumage et procede de fabrication d'une electrode de bougie d'allumage Download PDF

Info

Publication number
WO2007051677A1
WO2007051677A1 PCT/EP2006/066886 EP2006066886W WO2007051677A1 WO 2007051677 A1 WO2007051677 A1 WO 2007051677A1 EP 2006066886 W EP2006066886 W EP 2006066886W WO 2007051677 A1 WO2007051677 A1 WO 2007051677A1
Authority
WO
WIPO (PCT)
Prior art keywords
region
spark plug
plug electrode
cold welding
alloy
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.)
Ceased
Application number
PCT/EP2006/066886
Other languages
German (de)
English (en)
Inventor
Thomas Kaiser
Jochen Boehm
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 WO2007051677A1 publication Critical patent/WO2007051677A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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 invention relates to a spark plug electrode and a method for producing a spark plug electrode according to the closer defined in the preamble of patent claim 1 and of claim 12.
  • WO 2004/084367 A1 discloses a spark plug and a method for producing the spark plug for an internal combustion engine, which has at least two spark plug electrodes.
  • the spark plug electrodes comprise a first region consisting of a substrate material and a surface region or a second region which is more resistant than the substrate material.
  • the second region of the spark plug electrodes is connected to the first region via an intermediate region, wherein the intermediate region and the surface region are joined together by explosion welding.
  • explosion welding the intermediate region is bonded to the surface region without creating a fusion zone in the joint region. In this way, a mixing of the surface area with the substrate, which is accompanied by a depletion of the noble metal content of the surface layer in the bond area with the substrate material, is avoided in a simple manner.
  • spark plug electrodes with surface layers with layer thicknesses of 0.05 mm to 2 mm can be produced.
  • the surface area of the spark plug electrodes is first firmly bonded by placing a thin film on a refractory steel or a superalloy such as a Ni-base superalloy, followed by explosion welding to the intermediate portion without the melt zone. Subsequently, the intermediate region is welded to the first region by a conventional welding process.
  • spark plug electrodes of internal combustion engines used in automobiles are highly stressed due to high temperature fluctuations between standstill and the operation of the internal combustion engine.
  • These temperature stresses which are characterized especially by the startup of an internal combustion engine by steep temperature gradients, are also in connection with corrosive attacks such adverse operating conditions that connections between layers of a Spark plug electrode, which consist of Ni-base alloys and, for example, made of platinum and are joined together by explosion welding, break easily.
  • a Spark plug electrode which consist of Ni-base alloys and, for example, made of platinum and are joined together by explosion welding, break easily.
  • the present invention is therefore based on the object to provide a spark plug electrode with a long service life, which can be produced in a simple and cost-effective manner.
  • this object is achieved with a spark plug electrode according to the features of claim 1 and a method for producing a spark plug electrode with the features of claim 12.
  • the spark plug electrode according to the invention consists of a first region and a second region fixedly connected thereto, wherein the connection between the first region and the second region by applying a plastic deformation m the compressive force emanating facing contact surfaces of the first region and the second region is made.
  • the first region is made of a Ni-base alloy and the second region is made of pure Pt, Rh, Ir, Au or an alloy comprising at least one of these elements.
  • the first region and the second region are connected to one another by cold welding, so that the first region and the second region have a firmly interconnected one another - A -
  • a spark plug according to the invention has at least the service life of conventionally designed spark plugs, which are produced with a significantly higher noble metal rate, at considerably lower production costs.
  • the compressive force is applied such that the first region and the second region have such surface enlargements in the contact region that they are joined by cold welding.
  • the second region is placed on a newly executed first region and applied the required for the connection of the two areas pressing force by mate ⁇ alschonendes and process technology easy to handle rolling or roll cladding.
  • the spark plug electrodes are made by singulation, such as stamping or the like, from the material bond formed by cold welding.
  • the first region or the second region is substantially cylindrical and is introduced into the at least approximately hollow-cylindrical second region or first region.
  • the preferably coaxially arranged regions are pulled in the joined state by a pull-tab or a die.
  • the pressure force m required for connecting the regions is introduced into the two regions, wherein the individual spark plug electrodes are produced after being drawn by cutting to length from the plastically deformed and formed by cold welding Drahtf ⁇ rmigen Mate ⁇ alverbund.
  • Both the roll-plating process and the drawing process represent process-technically easy-to-handle production processes for spark-plug electrodes, by means of which noble-metal layers, which are generally characterized by high material costs, are cost-effective. can be applied to cheaper Ni-base alloys produced electrode Grundk ⁇ r- pern with low-cost layer thicknesses without reducing the life of a spark plug compared to conventionally designed spark plugs.
  • the pressure force to be applied during the joining process of the first region and of the second region of a spark plug electrode during roll-plating or drawing can be conducted into the two regions to be joined together, preferably with layer thicknesses of between 0.1 mm to 0.5 mm
  • the precious metal layer to be produced is not damaged or destroyed during the joining process and is present after the bonding process with a material structure required for a long service life of a spark plug.
  • FIG. 1 is a schematic representation of a spark plug m a
  • FIG. 2 shows a substrate and a noble metal layer to be joined thereto prior to roll-plating
  • FIG. 3 shows the substrate and the noble metal layer after roll-plating
  • FIG. 4 shows a representation of the substrate and the noble metal layer corresponding to FIG. 3 after a punching process
  • FIG. 5 shows a semifinished product produced by roll-plating, from which ground electrodes designed as roof electrodes can be produced according to the invention
  • FIG. 6 shows a semifinished product produced by roll-plating, from which laterally set ground electrodes according to the invention can be produced
  • FIG. 7 shows a cylindrical middle electrode designed according to the invention, which is formed from a core made of a Ni-base alloy and a hollow metal-noble noble metal shell;
  • FIG. 8 shows a representation corresponding to FIG. 7 of a center electrode designed according to the invention, which is produced from a cylindrical noble metal core and a jacket surrounding the noble metal core and produced from a Ni-base alloy.
  • FIG. 1 is a partial sectional view of an arranged in a cylinder head of an internal combustion engine spark plug 1 is shown, which can be screwed with a formed on a housing 2 outer walls 3 m an internal thread of the cylinder head.
  • the spark plug 1 formed in a manner known per se consists in the present case of metal, ceramic and glass. These materials have different properties that are used by material-appropriate design of the spark plug 1.
  • the most important constituents of the spark plug 1 are a connecting bolt 5, an insulator 6, the housing 2, a center electrode 7 and a mass Electrode 8, wherein an arranged in the insulator 6 and electrically conductive glass melt 9, the center electrode 7 connects to the terminal bolt 5.
  • the center electrode 7 and the ground electrode 8 are during the
  • the requirements may require different electrode shapes and electrode materials depending on the operating conditions and application.
  • pure metals conduct heat better than metal alloys.
  • pure metals such as nickel react more sensitively to chemical attacks of combustion gases and solid combustion residues than alloys.
  • platinum or platinum-based alloys are also used for the production of electrodes, since these have a very good corrosion resistance. have resistance to oxidation and oxidation as well as a high erosion resistance.
  • FIG. 2 to FIG. 4 schematically illustrate a manufacturing process for spark plug electrodes designed as center electrodes by means of roll plating.
  • FIG. 2 shows a first region 10, which in the present case is made of a Ni-base alloy and represents a planar or plate-like body.
  • a further planar, plate-like second region 11 is shown, which is placed on the first region 10 with a predefined layer thickness.
  • the second region 11 is in the present case made of pure Pt and, in further advantageous embodiments, besides pure Pt, it can also be produced from pure Rh, Ir, Au or from an alloy comprising at least one of these elements.
  • the two areas 10, 11 supplied to a device not shown in detail and applied by means of roll plating with a plastic deformation in the facing contact surfaces of the first region 10 and the second region 11 causing compressive force, so that the first region 10 and the second Area 11 after the roll cladding are connected by cold welding.
  • the second region 11 in the present case has, after the roll cladding, a dependence of the layer thickness of the second region 11 before the roll cladding and the compressive force applied during the roll cladding and also the dependence of the second region
  • dll 0.1 mm to 0.5 mm, preferably of 0.2 mm, wherein the layer thickness of the regions 10 and 11 before the roll cladding and also the rolling process para- - IO ⁇
  • meter are to be set depending on the respective application.
  • the first region 10 consists of a Ni-Cr-Fe alloy with 15% by weight Cr, 6% by weight Fe and the remainder Ni and also impurities present in the alloy.
  • the first region 10 may also be made of a Ni-Cr-Fe alloy containing 25% by weight of Cr, 18% by weight of Fe and balance Ni, and impurities.
  • a plurality of spark plug central electrodes 7 are produced by punching out of the material formed by cold welding in the manner shown in more detail in FIG. 4.
  • the stamped out spark plug center electrodes are then welded by means of laser or resistance welding on a further carrier 13, which consists for example of a conventional central electrode area with copper core or NiAllSilY or is made of another alloy with good thermal conductivity.
  • spark plug electrodes in the radio range can also be produced with very thin noble metal layers in the thickness range of less than 200 .mu.m, in comparison with welding methods or explosion welding are each secured with higher adhesive forces on the electrode body or on a Sumate ⁇ al.
  • spark plugs are inexpensive and can be produced with a long service life.
  • the roll cladding makes it possible to provide two different carrier materials for the second region 11.
  • the second region 11 of a spark plug center electrode can be rolled on an alloy which is very resistant to high-temperature corrosion. This in turn can be welded on with an alloy with good thermal conductivity. This means that in the case of a spark plug electrode produced at least in some areas by means of roll plating, it is possible to realize combinations of material properties which can not be achieved through the use of alloying techniques established for the production of spark plug electrodes.
  • spark plug ground electrodes 8 it is of course also possible to produce spark plug ground electrodes 8 according to the invention by roll cladding and cold welding occurring between the first region 10 'and the second region 11'.
  • FIG. 5 shows a semifinished product 12 from which spark plug grounding electrodes for so-called roof electrode spark plugs can be produced.
  • FIG. 6 shows a semifinished product 12, from which spark plug ground electrodes can be produced, which are welded to the housing 2 and are employed laterally.
  • cuboidal regions 12 having a length 1 of 15 mm, a height h of 1.5 mm and a width b of 2.5 mm are separated from the semi-finished product 12 shown in FIG. 5 by a suitable separation method, each having an end region with the rolled-up and by means of cold welding to the first region 10 'connected second region 11' are designed with a layer thickness dll of 0.2 mm.
  • the second region 11 ' is applied to an end surface of the first region 10' by roller cladding and joined thereto by cold welding, the spark plug ground electrodes being separated by a suitable separation method with predefined dimensions.
  • FIG. 7 and FIG. 8 two further exemplary embodiments of spark plug center electrodes 7 designed according to the invention and designed in a cylindrical shape are shown.
  • the embodiment according to FIG. 7 shows a cylindrically shaped first region 10 and a hollow-cylindrical second region 11 surrounding the first region 10, the first region 10 being made of a Ni-base alloy and the second region 11 being made of one of the abovementioned noble metals or a previously described noble metal alloy can be produced.
  • the spark plug center electrode 7 according to FIG. 8 is predominantly made up of a cylindrical second region 11 and a first region 10 which is formed as a wood cylinder and surrounds the second region 11, the second region 11 being made of pure platinum and the first region 10 being made of a Ni-base alloy.
  • both the first and also the second region in this embodiment of a spark plug center electrode 7 according to the invention can each be made of a different material listed above.
  • a cylindrical wire and a hollow-cylindrical or tubular element are used as precursors.
  • the cylindrical wire which represents either the later first region 10 or the later second region 11 of a spark plug center electrode 7, has a function of the particular application before plastic deformation Diameter from 1 mm to 4.5 mm.
  • the wire is inserted into a hollow-cylindrical jacket, which after the joining process represents the second region 11 or the first region 10 of a spark plug center electrode 7, wherein the hollow-cylindrical jacket has an outer diameter of 4.5 mm to 6 mm before cold welding to the wire and an inner diameter of 2 mm to 5 mm.
  • the coaxially preferably arranged to the jacket wire and the jacket are pulled in a telescoped state by a pull tab, not shown, and plastically deformed, while the required to connect the areas 10 and 11 compressive force is applied.
  • the spark plug center electrodes 7 produced in FIG. 7 and FIG. 8 are produced by cutting to length from the formed composite material.
  • the hollow region 11 of the hollow-cylindrical section 11 according to FIG. 7 has a layer thickness d 1 of 0.1 mm to 0.16 mm, preferably of 0.15 mm.
  • the outer diameter d_a of the spark plug center electrode 7 according to FIG. 8 is 0.78 mm to 0.84 mm, preferably 0.81 mm, while the inner diameter d_i of the second region 11 is 0.5 mm to 0.56 mm, preferably 0.53 mm, having.
  • the hollow-cylindrical first region 10 of the spark plug center electrode 7 according to FIG. 8 has, after cold welding, a layer thickness d10 of 0.08 mm to 0.12 mm, preferably 0.1 mm, while the outer diameter da of the first region 10 after cold shearing 0 , 77 mm to 0.83 m, preferably 0.8 mm, and the inner diameter is 0.58 mm to 0.62 mm, preferably 0, 6 mm.
  • the hollow-cylindrical first region 10 of the spark plug central electrode 7 according to FIG. 8 has an outer diameter of 4.5 mm to 6 mm and an inner diameter of 2 mm to 5 mm, while the cylindrically executed second region 11 has an outer diameter of 1 mm to 4.5 mm.
  • the spark plug center electrodes 7 according to FIG. 7 and FIG. 8 are designed with flat surfaces and with sharp corners on which electrical voltage peaks occur during operation of a spark plug, which in turn lead to ignition of the spark.
  • spark plug center electrode 7 in the case of the spark plug center electrode 7 according to FIG. 7, a so-called leveling off of the edges of a spark plug electrode is counteracted by the noble metal jacket or the second zone 11 executed in hollow-cylindrical fashion.
  • the first region 10 enveloped by the second region 11, which consists of a less spark-resistant Ni base alloy, will have a greater wear than the noble metal shell during operation of the spark plug, so that a concave formation forms in the interior of such a spark plug center electrode 7.
  • the diffusion annealing process achieves a better mixing of the two materials and a reduction in the mechanical stress gradient in the connection region, with the result that the service life of a spark plug can be further improved in a simple manner.
  • the annealing process can be provided in each case before or after the separation of the spark plug electrodes 7, 8.

Landscapes

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

Abstract

L'invention concerne une électrode (7, 8) de bougie d'allumage constituée d'une première partie (10, 10') et d'une deuxième partie (11, 11') reliée solidairement à la première, ainsi qu'un procédé de fabrication d'une électrode (7, 8) de bougie d'allumage. La liaison entre la première partie (10, 10') et la deuxième partie (11, 11') est réalisée par application d'une force de poussée qui a pour effet des déformations plastiques des surfaces de contact tournées l'une vers l'autre de la première partie (10, 10') et la deuxième partie (11, 11'). La première partie (10, 10') est réalisée en un alliage à base de nickel et la deuxième partie (11, 11') en Pt, Rh, Ir ou Au purs ou en un alliage qui présente au moins un de ces éléments. La force de poussée est appliquée de telle sorte que la première partie (10, 10') et la deuxième partie (11, 11') présentent dans la zone du contact des agrandissements de leur surface qui permettent de les relier par soudage à froid.
PCT/EP2006/066886 2005-11-03 2006-09-29 Electrode de bougie d'allumage et procede de fabrication d'une electrode de bougie d'allumage Ceased WO2007051677A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510052425 DE102005052425A1 (de) 2005-11-03 2005-11-03 Zündkerzenelektrode und Verfahren zum Herstellen einer Zündkerzenelektrode
DE102005052425.7 2005-11-03

Publications (1)

Publication Number Publication Date
WO2007051677A1 true WO2007051677A1 (fr) 2007-05-10

Family

ID=37308825

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/066886 Ceased WO2007051677A1 (fr) 2005-11-03 2006-09-29 Electrode de bougie d'allumage et procede de fabrication d'une electrode de bougie d'allumage

Country Status (2)

Country Link
DE (1) DE102005052425A1 (fr)
WO (1) WO2007051677A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11777282B2 (en) 2019-09-06 2023-10-03 Federal-Mogul Ignition Llc Electrode material for a spark plug

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9041274B2 (en) * 2013-01-31 2015-05-26 Federal-Mogul Ignition Company Spark plug having firing pad
DE102014103308B4 (de) * 2013-03-12 2019-08-29 Federal-Mogul Ignition Company Zündkerze sowie Verfahren zum Herstellen einer Zündkerze
US9368943B2 (en) 2013-03-12 2016-06-14 Federal-Mogul Ignition Company Spark plug having multi-layer sparking component attached to ground electrode
DE102014226226A1 (de) 2014-12-17 2016-06-23 Robert Bosch Gmbh Verfahren zur Herstellung einer Zündkerzen-Elektrode mit bis zur Zündfläche reichenden Kern
DE102015107998A1 (de) * 2015-05-20 2016-08-04 Federal-Mogul Ignition Gmbh Zündkerze und Verfahren zu ihrer Herstellung
DE102020104953A1 (de) 2020-02-26 2021-08-26 Bayerische Motoren Werke Aktiengesellschaft Zündkerze sowie Verfahren zum Herstellen einer Zündkerze
DE102020111654A1 (de) 2020-04-29 2021-11-04 Bayerische Motoren Werke Aktiengesellschaft Zündkerze für eine Verbrennungskraftmaschine sowie Verfahren zum Herstellen einer Elektrode für eine solche Zündkerze
DE102020211897A1 (de) 2020-09-23 2022-03-24 Robert Bosch Gesellschaft mit beschränkter Haftung Zündkerzenelektrode sowie Zündkerze mit der Zündkerzenelektrode und Herstellungsverfahren für die Zündkerzenelektrode
AT526189A1 (de) * 2022-05-25 2023-12-15 Swacrit Systems Gmbh Verfahren zur Herstellung einer Elektrode für eine Zündvorrichtung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3803892A (en) * 1972-04-18 1974-04-16 Nippon Denso Co Method of producing spark plug center electrode
DE3941649A1 (de) * 1989-12-16 1991-06-20 Bosch Gmbh Robert Verfahren zur herstellung von elektroden fuer zuendkerzen sowie zuendkerzen-elektroden
DE4424789A1 (de) * 1993-08-27 1995-03-02 Bosch Gmbh Robert Fließgepreßte, als Verbundkörper ausgebildete Elektrode
DE19859508A1 (de) * 1997-12-26 1999-07-01 Denso Corp Zündkerze für einen Verbrennungsmotor
DE10225800A1 (de) * 2002-06-10 2003-12-24 Beru Ag Verfahren zur Einbringung eines Edelmetalleinsatzes in eine Elektrodenspitze
WO2004084367A1 (fr) * 2003-03-18 2004-09-30 Wärtsilä Finland Oy Bougie d'allumage et procede de production de celle-ci
DE10342912A1 (de) * 2003-09-17 2005-04-21 Bosch Gmbh Robert Zündkerze

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3803892A (en) * 1972-04-18 1974-04-16 Nippon Denso Co Method of producing spark plug center electrode
DE3941649A1 (de) * 1989-12-16 1991-06-20 Bosch Gmbh Robert Verfahren zur herstellung von elektroden fuer zuendkerzen sowie zuendkerzen-elektroden
DE4424789A1 (de) * 1993-08-27 1995-03-02 Bosch Gmbh Robert Fließgepreßte, als Verbundkörper ausgebildete Elektrode
DE19859508A1 (de) * 1997-12-26 1999-07-01 Denso Corp Zündkerze für einen Verbrennungsmotor
DE10225800A1 (de) * 2002-06-10 2003-12-24 Beru Ag Verfahren zur Einbringung eines Edelmetalleinsatzes in eine Elektrodenspitze
WO2004084367A1 (fr) * 2003-03-18 2004-09-30 Wärtsilä Finland Oy Bougie d'allumage et procede de production de celle-ci
DE10342912A1 (de) * 2003-09-17 2005-04-21 Bosch Gmbh Robert Zündkerze

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11777282B2 (en) 2019-09-06 2023-10-03 Federal-Mogul Ignition Llc Electrode material for a spark plug

Also Published As

Publication number Publication date
DE102005052425A1 (de) 2007-05-10

Similar Documents

Publication Publication Date Title
DE69401472T2 (de) Zündkerze
EP2729277B1 (fr) Procédé de fabrication dýun disque doté d'un élément de raccordement électrique
DE112012002699B4 (de) Zündkerze und Verfahren zum Herstellen einer Elektrode einer Zündkerze
DE10205078B4 (de) Zündkerze
DE102010027463B4 (de) Zündkerze und Verfahren zu ihrer Herstellung
DE10137523B4 (de) Zündkerze
DE19719937C2 (de) Verfahren zum Herstellen eines Edelmetallplättchens für Elektroden einer Zündkerze
DE69301799T2 (de) Herstellungsverfahren für Zündkerze
DE10252736B4 (de) Zündkerze
DE102017104822B4 (de) Zündkerze und Verfahren zu ihrer Herstellung
DE112012000947B4 (de) Verfahren zum Herstellen eines Elektrodenmaterials für einen Zündkerze
EP0248977B1 (fr) Elément d'amorçage électrique et son procédé de fabrication
DE3030847A1 (de) Gegen bogenerosion bestaendige kompositwerkstoffe und verfahren zu ihrer herstellung
DE3811395A1 (de) Zuendkerze fuer eine brennkraftmaschine
DE112012004420B4 (de) Verfahren zum Herstellen einer Elektrode einer Zündkerze und Zündkerzen-Herstellungsverfahren
DE112016006310B4 (de) Zündkerze
DE10354439B4 (de) Zündkerze und Herstellungsverfahren dafür
WO2007051677A1 (fr) Electrode de bougie d'allumage et procede de fabrication d'une electrode de bougie d'allumage
DE102013106564B4 (de) Verfahren zum Herstellen eines Elektrodenmaterials für eine Zündkerze und Ruthenium-basiertes Material zur Verwendung in einer Zündkerze
DE102015105015A1 (de) Zündkerze
EP2012397B1 (fr) Bougie d'allumage et son procédé de fabrication
EP1413029B1 (fr) Procede pour mettre en place une pointe de metal noble sur une electrode, electrode et bougie d'allumage
DE102013007316B4 (de) Elektrodenmaterial für eine Zündkerze
DE102012101105A1 (de) Zündkerze
DE102014103053B4 (de) Verfahren zum Herstellen eines Zündkerzen-Elektrodenmaterials, Verfahren zum Herstellen einer Zündkerze, und Elektrodensegment zur Verwendung in einer Zündkerze

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase

Ref document number: 06806884

Country of ref document: EP

Kind code of ref document: A1