US3868530A - Spark plug - Google Patents

Spark plug Download PDF

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Publication number
US3868530A
US3868530A US376524A US37652473A US3868530A US 3868530 A US3868530 A US 3868530A US 376524 A US376524 A US 376524A US 37652473 A US37652473 A US 37652473A US 3868530 A US3868530 A US 3868530A
Authority
US
United States
Prior art keywords
electrode
precious metal
insert
center electrode
recess
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.)
Expired - Lifetime
Application number
US376524A
Other languages
English (en)
Inventor
Carl J Eaton
Richard S Podiak
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.)
Federal Mogul Ignition LLC
Original Assignee
Champion Spark Plug Co
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 Champion Spark Plug Co filed Critical Champion Spark Plug Co
Priority to US376524A priority Critical patent/US3868530A/en
Priority to ZA740727A priority patent/ZA74727B/xx
Priority to CA195,298A priority patent/CA1024843A/en
Priority to AU66972/74A priority patent/AU493752B2/en
Priority to FR7409666A priority patent/FR2236294B1/fr
Priority to BE142270A priority patent/BE812626A/xx
Priority to GB1317874A priority patent/GB1437142A/en
Priority to JP49041600A priority patent/JPS5847840B2/ja
Priority to DE19742463438 priority patent/DE2463438A1/de
Priority to DE2421585A priority patent/DE2421585C2/de
Priority to NLAANVRAGE7406133,A priority patent/NL176989C/xx
Priority to CH655874A priority patent/CH575669A5/xx
Priority to SE7406500A priority patent/SE399993B/xx
Priority to IT51227/74A priority patent/IT1013255B/it
Priority to BR4659/74A priority patent/BR7404659A/pt
Priority to AR254278A priority patent/AR202304A1/es
Priority to NO742285A priority patent/NO141493C/no
Priority to US05/521,182 priority patent/US3967149A/en
Priority to IN2446/CAL/74A priority patent/IN144298B/en
Application granted granted Critical
Publication of US3868530A publication Critical patent/US3868530A/en
Priority to MY162/78A priority patent/MY7800162A/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • ABSTRACT Primary Examiner Alfred L. Brody Attorney, Agent, or FirmOwen & Owen [57] ABSTRACT achieved.
  • the invention achieves the advantage while greatly reducing the mass of precious metal employed.
  • a further feature of the invention is the co-planar disposition of the end of the center electrode and its supporting insulator.
  • the rivet construction requires a large amount of precious metal which contributes nothing useful to the sparking life of the electrode. A very large portion of the precious metal is wasted as a support rod. Also in practice it has been found difficult to attach the rivet securely for long periods of operation in the corrosive atmosphere of the combustion chamber.
  • the center electrode protrudes from its supporting insulator and deposits on the insulator surface are deliberately excluded from the firing process. It has been found that under some circumstances these deposits can actually be used in a beneficial manner to extend the life of the spark plug.
  • the preferred form of the invention is an electrode comprising a base metal tube or drilled rod, such as a nickel alloy tube or a bored nickel alloy rod into the bore of which is inserted a short section of fine wire of a precious metal such as platinum or a platinum alloy.
  • a precious metal such as platinum or a platinum alloy.
  • various other precious or semi-precious metals may be used including tungsten which is much less expensive.
  • the fine wire section utilized can be as low as percent of that required by current known constructions to achieve comparable electrode life.
  • the assembled electrode is then put into a supporting insulator and in the preferred form of the invention, positioned with the sparking surface flush with the insulator tip. However, the electrode may project beyond the insulator tip if desired.
  • the nickel electrode is outwardly flared and an end cavity is drilled or pierced to receive a small cylindrical section of precious metal wire.
  • the nickel is then swaged back into its original diameter. This action firmly locks the precious metal insert into the base metal electrode by causing an undercut diameter in the precious metal wire at the position of entrance into the end of the base metal electrode. The swaging forces the trapped portion of the precious metal into full and firm engaging relationship with the electrode metal.
  • This method of execution is effective for all precious and semi-precious metal insert alloys having ductility and malleability characteristics better than or equal to the base metal electrode.
  • FIG. 1 is an elevational view with a portion shown as a central, vertical section of a spark plug having a center electrode formed according to the present invention.
  • FIGS. 2 and 3 are fragmentary sectional views of the center electrode itself, somewhat enlarged to indicate the method of manufacture.
  • FIG. 4 is a central sectional view of an electrode showing a typical condition after operation for an extended period and in which the precious metal wire has become exposed by reason of erosion of the nickel sheath.
  • FIGS. 5 and 6 are fragmentary central sectional views showing a modification of the invention in which a small cylindrical pellet of precious metal is used.
  • FIG. 7 is a fragmentary view, with parts in section, of a spark plug having a modified electrode form corresponding to FIG. 6.
  • FIG. 1 of the drawings shows a substantially conventional spark plug having a shell 10 that is adapted to be received in the threaded opening in an engine cylinder head.
  • the plug comprises an insulator ll seated in the shell 10, the insulator having a bore which receives a center electrode 15.
  • the center electrode is positioned in a bore 16 of the insulator 11 and sealed against gas leakage by a tamped mass of powder 17 or by any other suitable means.
  • the center electrode 15 includes a lower section 18 which may be made tubular or which may be drilled out to provide a central longitudinal hole for the purpose hereinafter described.
  • a ground electrode 19 completes the spark plug. It will be noted that in the form of the invention shown in FIG. 1, the end of the lower section or firing end of the center electrode 18 is co-planar or flush with the flat end of the insulator 11.
  • the lower electrode section 18 having been made tubular or having been drilled out, receives a fine wire insert which is, in the form shown made in two sections.
  • One section of the fine wire insert is made from a precious metal and is designated 21.
  • the remaining section of the wire insert is designated 22 and is made of a base metal such as iron or nickel merely to fill the bore of the nickel tube 18.
  • the fine wire insert may range in diameter between 0.010 inch to approximately 0.030 inch and its length is between 0.150 inch and 0.250 inch. Above the larger diameter the construction ceases to show all of the economies desired. Below the finer diameter the small section of precious metal wire becomes very difficult to handle in assembling the electrode and the finer wires are therefore not preferred. Alloys of gold, platinum, palladium, rhodium, rhenium, ruthenium and tungsten are among the so-called precious metals that may be used for the exposed section of the fine wire electrode. Substantially the only criterion is that the precious metal alloy be such that it can be drawn into wire form and that it will resist sparking erosion.
  • the assemblage is swaged to reduce the diameter of the lower electrode section somewhat and to lock the sections 21 and 22 in place in the sheath by mechanical adherence between the wire and the nickel sheath. It has been found that the swaged electrode stays together through repeated heating and cooling cycles because of the long axial contact between the insert and the nickel sheath.
  • the apparatus used to accomplish the swaging step is conventional.
  • the base metal section 22 of the fine wire insert is used only to plug the bore of the tube 18 and conserve on the quantity of precious metal wire.
  • the base metal plug will also produce a uniform outside diameter of the electrode during swaging and will assist in plugging the tube against gas leakage.
  • the nickel sheath serves to protect the sides of the tungsten wire against chemical attack by the combustion gases. Tungsten alloys are found to be highly satisfactory meterials for electrode use if the non-sparking surfaces can be adequately protected. The tightly swaged nickel sheath serves to protect the tungsten insert and confines the erosion and corrosion only to the exposed end face.
  • the precious metal is initially in the form of a small cylindrical pellet 30.
  • the nickel electrode is shown at 31.
  • the electrode is pierced at its firing end to form a recess 32 and the adjacent metal of the electrode is flared out as at 33.
  • the pellet 30 is placed in the recess 32 and the assembly is swaged to force the nickel into intimate engagement with the side walls of the pellet as shown in FlG. 6.
  • the swaging action causes the enlarged portion 33 of electrode 31 to exert greater radial pressure on the mid portion of the precious metal pellet 30 resulting in an undercut diameter in the pellet 30 at the point where it emerges from the nickel electrode 31. This action traps the portion of the insert 30 which is within the cavity 32 and forces it into full and tight contact with the walls of the cavity.
  • the precious metal of the pellet can be left extended from the nickel 'wire 31, if desired, as shown in FIG. 7.
  • the sparking will occur generally only to the precious metal because the nickel will be too far away for sparking and the configuration of the tip of the plug will not change significantly after prolonged use.
  • the protrusion of the precious metal from the nickel may be omitted if desired.
  • a spark plug having a grounded shell, an insulator, at least one ground electrode carried by the shell, and a center electrode extending through said insulator and terminating in sparking relationship with said ground electrode, said center electrode being formed of metal having good spark corrosion resistant properties, the improvement comprising an axial recess in the firing end of the center electrode, said recess being larger in cross section at its inner end than at its outer end, and an insert of precious metal extending into and filling the recess, said insert being firmly supported by the adjacent electrode with its end exposed at the firing end of the electrode.
  • the insert is a corrosion resistant metal alloy selected from the group consisting of gold, platinum, palladium, ruthenium, rhenium, rhodium and tungsten.

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  • Spark Plugs (AREA)
US376524A 1973-07-05 1973-07-05 Spark plug Expired - Lifetime US3868530A (en)

Priority Applications (20)

Application Number Priority Date Filing Date Title
US376524A US3868530A (en) 1973-07-05 1973-07-05 Spark plug
ZA740727A ZA74727B (en) 1973-07-05 1974-02-05 Spark plug
CA195,298A CA1024843A (en) 1973-07-05 1974-03-18 Spark plug
AU66972/74A AU493752B2 (en) 1973-07-05 1974-03-21 Sparkplug
FR7409666A FR2236294B1 (enrdf_load_stackoverflow) 1973-07-05 1974-03-21
BE142270A BE812626A (fr) 1973-07-05 1974-03-21 Bougie d'allumage a electrode composite et son procede de realisation
GB1317874A GB1437142A (en) 1973-07-05 1974-03-25 Spark plug centre electrode therefor and method of forming same
JP49041600A JPS5847840B2 (ja) 1973-07-05 1974-04-10 点火プラグの製造方法
DE2421585A DE2421585C2 (de) 1973-07-05 1974-05-03 Verfahren zur Herstellung einer mit einem kleinvolumigen Edelmetalleinsatz versehenen Mittelelektrode einer Zündkerze sowie nach diesem Verfahren hergestellte Zündkerze
DE19742463438 DE2463438A1 (enrdf_load_stackoverflow) 1973-07-05 1974-05-03
NLAANVRAGE7406133,A NL176989C (nl) 1973-07-05 1974-05-07 Werkwijze voor het vervaardigen van een centrale elektrode voor een bougie.
CH655874A CH575669A5 (enrdf_load_stackoverflow) 1973-07-05 1974-05-14
SE7406500A SE399993B (sv) 1973-07-05 1974-05-15 Forfarande for framstellning av en mittelektrod for tendstift
IT51227/74A IT1013255B (it) 1973-07-05 1974-05-27 Candela d accensione p r motori a combustione interna
BR4659/74A BR7404659A (pt) 1973-07-05 1974-06-06 Velas de ignicao para motores de combustao interna
AR254278A AR202304A1 (es) 1973-07-05 1974-06-19 Metodo para fabricar el electrodo central de una bujia de encendido y una bujia que incluye el electrodo asi fabricado
NO742285A NO141493C (no) 1973-07-05 1974-06-24 Fremgangsmaate for fremstilling av en midtelektrode for tennplugg.
US05/521,182 US3967149A (en) 1973-07-05 1974-11-06 Spark plug
IN2446/CAL/74A IN144298B (enrdf_load_stackoverflow) 1973-07-05 1974-11-07
MY162/78A MY7800162A (en) 1973-07-05 1978-12-30 An improved spark plug, centre electrode therefor and method of forming same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US376524A US3868530A (en) 1973-07-05 1973-07-05 Spark plug

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/521,182 Division US3967149A (en) 1973-07-05 1974-11-06 Spark plug

Publications (1)

Publication Number Publication Date
US3868530A true US3868530A (en) 1975-02-25

Family

ID=23485359

Family Applications (1)

Application Number Title Priority Date Filing Date
US376524A Expired - Lifetime US3868530A (en) 1973-07-05 1973-07-05 Spark plug

Country Status (17)

Country Link
US (1) US3868530A (enrdf_load_stackoverflow)
JP (1) JPS5847840B2 (enrdf_load_stackoverflow)
AR (1) AR202304A1 (enrdf_load_stackoverflow)
BE (1) BE812626A (enrdf_load_stackoverflow)
BR (1) BR7404659A (enrdf_load_stackoverflow)
CA (1) CA1024843A (enrdf_load_stackoverflow)
CH (1) CH575669A5 (enrdf_load_stackoverflow)
DE (2) DE2463438A1 (enrdf_load_stackoverflow)
FR (1) FR2236294B1 (enrdf_load_stackoverflow)
GB (1) GB1437142A (enrdf_load_stackoverflow)
IN (1) IN144298B (enrdf_load_stackoverflow)
IT (1) IT1013255B (enrdf_load_stackoverflow)
MY (1) MY7800162A (enrdf_load_stackoverflow)
NL (1) NL176989C (enrdf_load_stackoverflow)
NO (1) NO141493C (enrdf_load_stackoverflow)
SE (1) SE399993B (enrdf_load_stackoverflow)
ZA (1) ZA74727B (enrdf_load_stackoverflow)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229672A (en) * 1979-01-04 1980-10-21 Ford Motor Company Spark plug with low erosion electrode tip
US4324588A (en) * 1979-08-17 1982-04-13 Engelhard Corporation Arc erosion resistant composite materials and processes for their manufacture
DE3132814A1 (de) * 1980-08-21 1982-04-15 Nippondenso Co., Ltd., Kariya, Aichi "zuendkerze fuer brennkraftmaschinen"
US4465952A (en) * 1981-03-31 1984-08-14 Nippondenso Co., Ltd. Spark plug for internal combustion engines
US4488081A (en) * 1981-10-01 1984-12-11 Nippondenso Co., Ltd. Ignition plug
US4540910A (en) * 1982-11-22 1985-09-10 Nippondenso Co., Ltd. Spark plug for internal-combustion engine
US4700103A (en) * 1984-08-07 1987-10-13 Ngk Spark Plug Co., Ltd. Spark plug and its electrode configuration
US4699600A (en) * 1981-04-30 1987-10-13 Nippondenso Co., Ltd. Spark plug and method of manufacturing the same
US4840594A (en) * 1988-06-06 1989-06-20 Allied-Signal Inc. Method for manufacturing electrodes for a spark plug
US5179313A (en) * 1989-08-11 1993-01-12 Ford Motor Company Forming an erosion resistant tip on an electrode
US5465022A (en) * 1992-08-12 1995-11-07 Nippondenso Co., Ltd. Spark plug for internal-combustion engine and manufacture method of the same
US6132277A (en) * 1998-10-20 2000-10-17 Federal-Mogul World Wide, Inc. Application of precious metal to spark plug electrode
US6614145B2 (en) 2001-08-21 2003-09-02 Federal-Mogul World Wide, Inc. Two-piece swaged center electrode assembly
US20050093412A1 (en) * 2003-11-05 2005-05-05 Federal-Mogul World Wide, Inc. Spark plug center electrode assembly
EP1544457A1 (de) * 2003-12-20 2005-06-22 Robert Bosch Gmbh Vorrichtung zum Zünden eines Luft-Kraftstoff-Gemischs in einem Verbrennungsmotor
US20080295925A1 (en) * 2005-08-15 2008-12-04 W.C. Heraeus Gmbh Pt/pd alloy wires, strips or reshaped parts hardened by oxide dispersion, and process of producing the same
US7615914B2 (en) * 2001-06-05 2009-11-10 Ge Jenbacher Gmbh & Co Ohg Spark plug of an internal combustion engine
US20100276646A1 (en) * 2007-02-14 2010-11-04 W.C. Heraeus Gmbh Pt or pt alloy materials hardened by oxide dispersion, produced by inner oxidation and having proportions of oxide and good ductility
US20110127900A1 (en) * 2009-12-01 2011-06-02 Federal-Mogul Ignition Company Electrode material for a spark plug
CN103647219A (zh) * 2006-07-21 2014-03-19 能量脉冲科技有限公司 高功率放电燃料点火器
US8979606B2 (en) 2012-06-26 2015-03-17 Federal-Mogul Ignition Company Method of manufacturing a ruthenium-based spark plug electrode material into a desired form and a ruthenium-based material for use in a spark plug
US9004969B2 (en) 2011-10-24 2015-04-14 Federal-Mogul Ignition Company Spark plug electrode and spark plug manufacturing method
US9130358B2 (en) 2013-03-13 2015-09-08 Federal-Mogul Ignition Company Method of manufacturing spark plug electrode material
US9287686B2 (en) 2006-05-12 2016-03-15 Enerpulse, Inc. Method of making composite spark plug with capacitor
US9640952B2 (en) 2012-01-27 2017-05-02 Enerpulse, Inc. High power semi-surface gap plug
US10044172B2 (en) * 2012-04-27 2018-08-07 Federal-Mogul Ignition Company Electrode for spark plug comprising ruthenium-based material
US10714907B2 (en) * 2017-08-28 2020-07-14 Tenneco Inc. Corona igniter firing end electrode tip with dual metal rivets and method of manufacture
US20200386147A1 (en) * 2017-12-05 2020-12-10 Daimler Ag Pre-Chamber Spark Plug for a Combustion Chamber of an Internal Combustion Engine, in Particular of a Motor Vehicle, and an Internal Combustion Engine for a Motor Vehicle

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2463415A1 (fr) * 1979-08-10 1981-02-20 Marchal Equipements Automobile Dispositif de mesure comportant un pont capacitif
ZA805008B (en) * 1979-10-22 1981-08-26 Champion Spark Plug Co Spark igniter
DE3335855A1 (de) * 1983-10-03 1985-04-11 G. Rau GmbH & Co, 7530 Pforzheim Zuendkerzenmittelelektrode
US4684352A (en) * 1985-03-11 1987-08-04 Champion Spark Plug Company Method for producing a composite spark plug center electrode
DE3605300A1 (de) * 1986-02-19 1987-08-20 Beru Werk Ruprecht Gmbh Co A Zuendkerze
GB2235493A (en) * 1989-08-25 1991-03-06 Champion Spark Plug Europ Spark plug electrodes
DE4238973A1 (de) * 1992-11-19 1994-05-26 Bosch Gmbh Robert Zündkerze für Brennkraftmaschinen, insbesondere für Brennkraftmaschinen von Kraftfahrzeugen
GB2276207B (en) * 1993-03-18 1996-09-04 Nippon Denso Co A spark plug and a method of producing the same
DE102013210447B4 (de) * 2013-06-05 2017-10-19 Robert Bosch Gmbh Zündkerzenelektrode mit Nickel-Rhodium-Beschichtung, sowie Verfahren zur Herstellunq und Zündkerze mit einer solchen Zündkerzenelektrode
DE102013210456B4 (de) * 2013-06-05 2018-05-30 Robert Bosch Gmbh Zündkerze mit sich bildender nickelreicher Schutzschicht

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US2168206A (en) * 1938-02-11 1939-08-01 Jr Arthur C Hastings Spark plug
US2318922A (en) * 1943-05-11 Sparking plug
US2406966A (en) * 1942-05-15 1946-09-03 Int Nickel Co Spark plug electrode
US2783409A (en) * 1952-03-31 1957-02-26 Gen Motors Corp Spark plug electrode and process for making same
US2815463A (en) * 1951-09-27 1957-12-03 Bendix Aviat Corp Electrical apparatus
US2955222A (en) * 1958-06-25 1960-10-04 Bosch Gmbh Robert Center electrode structure for spark plugs and process for making the same
US3315113A (en) * 1964-10-20 1967-04-18 Champion Spark Plug Co Iridium tip electrode and method of making the same
US3407326A (en) * 1967-03-14 1968-10-22 Ford Motor Co Spark plug having a composite gold or gold alloy electrode and a process for its manufacture
US3548472A (en) * 1967-11-15 1970-12-22 Hitachi Ltd Ignition plug and method for manufacturing a center electrode for the same
US3803982A (en) * 1972-12-04 1974-04-16 Tripp D Curvilinear surface planer

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FR819156A (fr) * 1936-06-15 1937-10-12 D App Mecaniques Et Electr Pou Perfectionnements apportés aux électrodes des bougies d'allumage pour motenrs à explosion
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DE1080374B (de) * 1958-02-18 1960-04-21 Rau Fa G Verfahren zum Herstellen von Zuendkerzenelektroden fuer Brennkraftmaschinen
AT251298B (de) * 1963-04-01 1966-12-27 Heraeus Gmbh W C Verwendung einer Platinmetallegierung als Werkstoff für Zündkerzenelektroden
US3431614A (en) 1965-10-21 1969-03-11 Ford Motor Co Method for manufacturing an electrode
JPS56920B2 (enrdf_load_stackoverflow) * 1972-04-04 1981-01-10
JPS4927728A (enrdf_load_stackoverflow) * 1972-07-12 1974-03-12
JPS4971632U (enrdf_load_stackoverflow) * 1972-10-11 1974-06-21
JPS5338046U (enrdf_load_stackoverflow) * 1976-09-08 1978-04-03

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US2318922A (en) * 1943-05-11 Sparking plug
US2168206A (en) * 1938-02-11 1939-08-01 Jr Arthur C Hastings Spark plug
US2406966A (en) * 1942-05-15 1946-09-03 Int Nickel Co Spark plug electrode
US2815463A (en) * 1951-09-27 1957-12-03 Bendix Aviat Corp Electrical apparatus
US2783409A (en) * 1952-03-31 1957-02-26 Gen Motors Corp Spark plug electrode and process for making same
US2955222A (en) * 1958-06-25 1960-10-04 Bosch Gmbh Robert Center electrode structure for spark plugs and process for making the same
US3315113A (en) * 1964-10-20 1967-04-18 Champion Spark Plug Co Iridium tip electrode and method of making the same
US3407326A (en) * 1967-03-14 1968-10-22 Ford Motor Co Spark plug having a composite gold or gold alloy electrode and a process for its manufacture
US3548472A (en) * 1967-11-15 1970-12-22 Hitachi Ltd Ignition plug and method for manufacturing a center electrode for the same
US3803982A (en) * 1972-12-04 1974-04-16 Tripp D Curvilinear surface planer

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229672A (en) * 1979-01-04 1980-10-21 Ford Motor Company Spark plug with low erosion electrode tip
US4324588A (en) * 1979-08-17 1982-04-13 Engelhard Corporation Arc erosion resistant composite materials and processes for their manufacture
DE3132814A1 (de) * 1980-08-21 1982-04-15 Nippondenso Co., Ltd., Kariya, Aichi "zuendkerze fuer brennkraftmaschinen"
US4465952A (en) * 1981-03-31 1984-08-14 Nippondenso Co., Ltd. Spark plug for internal combustion engines
US4699600A (en) * 1981-04-30 1987-10-13 Nippondenso Co., Ltd. Spark plug and method of manufacturing the same
US4488081A (en) * 1981-10-01 1984-12-11 Nippondenso Co., Ltd. Ignition plug
US4540910A (en) * 1982-11-22 1985-09-10 Nippondenso Co., Ltd. Spark plug for internal-combustion engine
US4700103A (en) * 1984-08-07 1987-10-13 Ngk Spark Plug Co., Ltd. Spark plug and its electrode configuration
US4840594A (en) * 1988-06-06 1989-06-20 Allied-Signal Inc. Method for manufacturing electrodes for a spark plug
US5179313A (en) * 1989-08-11 1993-01-12 Ford Motor Company Forming an erosion resistant tip on an electrode
US5465022A (en) * 1992-08-12 1995-11-07 Nippondenso Co., Ltd. Spark plug for internal-combustion engine and manufacture method of the same
US6132277A (en) * 1998-10-20 2000-10-17 Federal-Mogul World Wide, Inc. Application of precious metal to spark plug electrode
US7615914B2 (en) * 2001-06-05 2009-11-10 Ge Jenbacher Gmbh & Co Ohg Spark plug of an internal combustion engine
US6614145B2 (en) 2001-08-21 2003-09-02 Federal-Mogul World Wide, Inc. Two-piece swaged center electrode assembly
US20050093412A1 (en) * 2003-11-05 2005-05-05 Federal-Mogul World Wide, Inc. Spark plug center electrode assembly
US7049733B2 (en) 2003-11-05 2006-05-23 Federal-Mogul Worldwide, Inc. Spark plug center electrode assembly
EP1544457A1 (de) * 2003-12-20 2005-06-22 Robert Bosch Gmbh Vorrichtung zum Zünden eines Luft-Kraftstoff-Gemischs in einem Verbrennungsmotor
US20080295925A1 (en) * 2005-08-15 2008-12-04 W.C. Heraeus Gmbh Pt/pd alloy wires, strips or reshaped parts hardened by oxide dispersion, and process of producing the same
US7736752B2 (en) * 2005-08-15 2010-06-15 W.C. Heraeus Gmbh Pt/Pd alloy wires, strips or reshaped parts hardened by oxide dispersion, and process of producing the same
US9287686B2 (en) 2006-05-12 2016-03-15 Enerpulse, Inc. Method of making composite spark plug with capacitor
CN103647219A (zh) * 2006-07-21 2014-03-19 能量脉冲科技有限公司 高功率放电燃料点火器
US8226855B2 (en) 2007-02-14 2012-07-24 Heraeus Materials Technology Gmbh & Co. Kg Pt or Pt alloy materials hardened by oxide dispersion, produced by inner oxidation and having proportions of oxide and good ductility
US20100276646A1 (en) * 2007-02-14 2010-11-04 W.C. Heraeus Gmbh Pt or pt alloy materials hardened by oxide dispersion, produced by inner oxidation and having proportions of oxide and good ductility
US8274203B2 (en) * 2009-12-01 2012-09-25 Federal-Mogul Ignition Company Electrode material for a spark plug
US20110127900A1 (en) * 2009-12-01 2011-06-02 Federal-Mogul Ignition Company Electrode material for a spark plug
US9004969B2 (en) 2011-10-24 2015-04-14 Federal-Mogul Ignition Company Spark plug electrode and spark plug manufacturing method
US9640952B2 (en) 2012-01-27 2017-05-02 Enerpulse, Inc. High power semi-surface gap plug
US10044172B2 (en) * 2012-04-27 2018-08-07 Federal-Mogul Ignition Company Electrode for spark plug comprising ruthenium-based material
US8979606B2 (en) 2012-06-26 2015-03-17 Federal-Mogul Ignition Company Method of manufacturing a ruthenium-based spark plug electrode material into a desired form and a ruthenium-based material for use in a spark plug
US9130358B2 (en) 2013-03-13 2015-09-08 Federal-Mogul Ignition Company Method of manufacturing spark plug electrode material
US10714907B2 (en) * 2017-08-28 2020-07-14 Tenneco Inc. Corona igniter firing end electrode tip with dual metal rivets and method of manufacture
US20200386147A1 (en) * 2017-12-05 2020-12-10 Daimler Ag Pre-Chamber Spark Plug for a Combustion Chamber of an Internal Combustion Engine, in Particular of a Motor Vehicle, and an Internal Combustion Engine for a Motor Vehicle
US11635017B2 (en) * 2017-12-05 2023-04-25 Daimler Ag Pre-chamber spark plug for a combustion chamber of an internal combustion engine, in particular of a motor vehicle, and an internal combustion engine for a motor vehicle

Also Published As

Publication number Publication date
BR7404659A (pt) 1976-02-10
NO141493C (no) 1980-03-19
NO141493B (no) 1979-12-10
FR2236294A1 (enrdf_load_stackoverflow) 1975-01-31
DE2421585C2 (de) 1985-10-17
SE7406500L (enrdf_load_stackoverflow) 1975-01-07
ZA74727B (en) 1974-12-24
SE399993B (sv) 1978-03-06
IT1013255B (it) 1977-03-30
DE2421585A1 (de) 1975-01-30
NL7406133A (nl) 1975-01-07
MY7800162A (en) 1978-12-31
GB1437142A (en) 1976-05-26
AR202304A1 (es) 1975-05-30
CH575669A5 (enrdf_load_stackoverflow) 1976-05-14
JPS5022942A (enrdf_load_stackoverflow) 1975-03-12
NL176989C (nl) 1985-07-01
FR2236294B1 (enrdf_load_stackoverflow) 1978-09-29
CA1024843A (en) 1978-01-24
NO742285L (enrdf_load_stackoverflow) 1975-02-03
IN144298B (enrdf_load_stackoverflow) 1978-04-22
BE812626A (fr) 1974-07-15
NL176989B (nl) 1985-02-01
AU6697274A (en) 1975-09-25
JPS5847840B2 (ja) 1983-10-25
DE2463438A1 (enrdf_load_stackoverflow) 1985-07-04

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