FR2451648A1 - Spar plug middle electrode has corrosion and erosion resistant core - with sheath of higher thermal conductivity - Google Patents

Spar plug middle electrode has corrosion and erosion resistant core - with sheath of higher thermal conductivity

Info

Publication number
FR2451648A1
FR2451648A1 FR8005602A FR8005602A FR2451648A1 FR 2451648 A1 FR2451648 A1 FR 2451648A1 FR 8005602 A FR8005602 A FR 8005602A FR 8005602 A FR8005602 A FR 8005602A FR 2451648 A1 FR2451648 A1 FR 2451648A1
Authority
FR
France
Prior art keywords
sheath
core
corrosion
thermal conductivity
higher thermal
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
FR8005602A
Other languages
French (fr)
Other versions
FR2451648B1 (en
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.)
Texas Instruments Inc
Original Assignee
Texas Instruments Inc
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 Texas Instruments Inc filed Critical Texas Instruments Inc
Publication of FR2451648A1 publication Critical patent/FR2451648A1/en
Application granted granted Critical
Publication of FR2451648B1 publication Critical patent/FR2451648B1/fr
Granted 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
    • H01T13/39—Selection of materials for electrodes

Landscapes

  • Spark Plugs (AREA)

Abstract

Spark plug has a middle electrode with a core of metal with good resistance to corrosion and erosion, to which is bonded a sheath of metal with higher thermal conductivity than the core. The core pref. extends further than the sheath at the spark gap end. There is no sheath over 10-65 (20-35)% of the surface area along the core. The sheath consists of O2-free Cu (alloy) of high electrical conductivity and the core of Ni(alloy). There is a seal of material contg. Ni in the form of an annular cap between the core and the spark gap end of the refractory body to shield the sheath from the environment. This seal can be made in one piece with the core. There can also be a coating of material resistant to corrosion and erosion on the outside of the sheath, a 0.00254-0.0762 mm Ni coating being pref. Heating transfer is improved, whilst good corrosion and erosion resistance are retained. The mfr. of these spark plugs is economical and compatible with current mfg. techniques.
FR8005602A 1979-03-13 1980-03-13 Spar plug middle electrode has corrosion and erosion resistant core - with sheath of higher thermal conductivity Granted FR2451648A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2011279A 1979-03-13 1979-03-13
US10135779A 1979-12-07 1979-12-07

Publications (2)

Publication Number Publication Date
FR2451648A1 true FR2451648A1 (en) 1980-10-10
FR2451648B1 FR2451648B1 (en) 1983-09-23

Family

ID=26693041

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8005602A Granted FR2451648A1 (en) 1979-03-13 1980-03-13 Spar plug middle electrode has corrosion and erosion resistant core - with sheath of higher thermal conductivity

Country Status (2)

Country Link
DE (1) DE3009721A1 (en)
FR (1) FR2451648A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0537156A1 (en) * 1990-04-04 1993-04-21 Cooper Ind Inc Spark plug for internal combustion engine.
EP0637863A1 (en) * 1993-08-02 1995-02-08 Cooper Industries, Inc. Spark plug electrodes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10319698A1 (en) * 2003-05-02 2004-11-18 Volkswagen Ag Spark plug for I.C. engines comprises a middle electrode made from a material other than precious metals and a mass electrodes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2058438A5 (en) * 1969-09-03 1971-05-28 Champion Spark Plug Co
FR2171105A1 (en) * 1972-02-08 1973-09-21 Champion Spark Plug Co
FR2186762A1 (en) * 1972-06-01 1974-01-11 Lucas Aerospace Ltd
FR2285735A1 (en) * 1974-09-18 1976-04-16 Bosch Gmbh Robert ELECTRODE FOR SPARK PLUGS

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2058438A5 (en) * 1969-09-03 1971-05-28 Champion Spark Plug Co
FR2171105A1 (en) * 1972-02-08 1973-09-21 Champion Spark Plug Co
FR2186762A1 (en) * 1972-06-01 1974-01-11 Lucas Aerospace Ltd
FR2285735A1 (en) * 1974-09-18 1976-04-16 Bosch Gmbh Robert ELECTRODE FOR SPARK PLUGS

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0537156A1 (en) * 1990-04-04 1993-04-21 Cooper Ind Inc Spark plug for internal combustion engine.
EP0537156A4 (en) * 1990-04-04 1994-04-27 Cooper Industries Inc.
EP0637863A1 (en) * 1993-08-02 1995-02-08 Cooper Industries, Inc. Spark plug electrodes
US5743777A (en) * 1993-08-02 1998-04-28 Cooper Industries, Inc. Method of manufacturing nickel core copper center electrodes

Also Published As

Publication number Publication date
DE3009721A1 (en) 1980-09-25
FR2451648B1 (en) 1983-09-23

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Legal Events

Date Code Title Description
ST Notification of lapse