EP1837964A3 - Spark plug for use in an internal-combustion engine - Google Patents

Spark plug for use in an internal-combustion engine Download PDF

Info

Publication number
EP1837964A3
EP1837964A3 EP07251139A EP07251139A EP1837964A3 EP 1837964 A3 EP1837964 A3 EP 1837964A3 EP 07251139 A EP07251139 A EP 07251139A EP 07251139 A EP07251139 A EP 07251139A EP 1837964 A3 EP1837964 A3 EP 1837964A3
Authority
EP
European Patent Office
Prior art keywords
ground electrode
spark plug
face
comprised
sectional area
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
EP07251139A
Other languages
German (de)
French (fr)
Other versions
EP1837964A2 (en
EP1837964B1 (en
Inventor
Kazuyoshi c/o NGK Spark Plug Co. Ltd. Torii
Kazumasa C/O Ngk Spark Plug Co. Ltd. Yoshida
Wataru C/O Ngk Spark Plug Co. Ltd. Matsutani
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.)
Niterra Co Ltd
Original Assignee
NGK Spark Plug Co Ltd
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 NGK Spark Plug Co Ltd filed Critical NGK Spark Plug Co Ltd
Publication of EP1837964A2 publication Critical patent/EP1837964A2/en
Publication of EP1837964A3 publication Critical patent/EP1837964A3/en
Application granted granted Critical
Publication of EP1837964B1 publication Critical patent/EP1837964B1/en
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
    • H01T13/20—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

Abstract

A spark plug 100 is comprised of a metal shell 1, an insulator 2, a center electrode 3 and a ground electrode 4. A rear-end face of the ground electrode 4 is welded to a front-end face of the metal shell 1, and a bent portion 5 located at the intermediated position in the longitudinal direction is bent toward the center of the spark plug 100. The ground electrode 4 assumes a circular-shape with a diameter of 2mm or less whereby an inflow of an air-fuel mixture is not disturbed even when the air-fuel mixture directly flows into a back face of the ground electrode 4. The ground electrode 4 is comprised of an outer layer 4A made of a nickel alloy and an inner layer 4B made of pure copper with an excellent thermal conductivity, in which a ratio of a cross-sectional area of the inner layer 4B to the entire cross-sectional area of the ground electrode 4 is 10% or more to 35% or less. Thus, the spark plug 100 which is excellent in heat sinking ability and can prevent a spring back phenomenon due to a difference in a coefficient of thermal expansion.
EP20070251139 2006-03-20 2007-03-19 Spark plug for use in an internal-combustion engine Active EP1837964B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006075806 2006-03-20

Publications (3)

Publication Number Publication Date
EP1837964A2 EP1837964A2 (en) 2007-09-26
EP1837964A3 true EP1837964A3 (en) 2013-01-16
EP1837964B1 EP1837964B1 (en) 2014-02-12

Family

ID=38134089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070251139 Active EP1837964B1 (en) 2006-03-20 2007-03-19 Spark plug for use in an internal-combustion engine

Country Status (2)

Country Link
EP (1) EP1837964B1 (en)
CN (1) CN101043125B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4719191B2 (en) * 2007-07-17 2011-07-06 日本特殊陶業株式会社 Spark plug for internal combustion engine
JPWO2009153927A1 (en) * 2008-06-18 2011-11-24 日本特殊陶業株式会社 Spark plug
CN102138260B (en) * 2008-09-02 2013-07-31 日本特殊陶业株式会社 Spark plug
US8207657B2 (en) * 2008-11-04 2012-06-26 Ngk Spark Plug Co., Ltd. Spark plug and method of manufacturing the same
US8519606B2 (en) * 2009-08-26 2013-08-27 Ngk Spark Plug Co., Ltd. Spark plug for internal combustion engine and method of manufacturing spark plug
EP2621035B1 (en) * 2010-09-24 2018-11-21 Ngk Spark Plug Co., Ltd. Spark plug electrode, method for producing same, spark plug, and method for producing spark plug
WO2012039229A1 (en) * 2010-09-24 2012-03-29 日本特殊陶業株式会社 Spark plug electrode, method for producing same, spark plug, and method for producing spark plug
JP2015133243A (en) * 2014-01-14 2015-07-23 日本特殊陶業株式会社 spark plug
DE102018125456A1 (en) * 2018-10-15 2020-04-16 Bayerische Motoren Werke Aktiengesellschaft Spark plug and method for producing an electrode
CN110792515B (en) * 2019-11-08 2022-05-06 陕西航空电气有限责任公司 Ignition electric nozzle of high-thrust engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4331899A (en) * 1979-03-09 1982-05-25 Nippon Soken, Inc. Spark plug
US5210457A (en) * 1990-09-07 1993-05-11 Ngk Spark Plug Co., Ltd. Outer electrode for spark plug and a method of manufacturing thereof
US20030038575A1 (en) * 2001-03-15 2003-02-27 Tsunenobu Hori Spark plug for an internal combustion engine
US20040041505A1 (en) * 2001-06-15 2004-03-04 Jochen Fischer Spark plug

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2726864B1 (en) * 1994-11-15 1996-12-27 Sagem Allumage IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINE
JPH08213149A (en) * 1995-02-01 1996-08-20 Ngk Spark Plug Co Ltd Spark plug

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4331899A (en) * 1979-03-09 1982-05-25 Nippon Soken, Inc. Spark plug
US5210457A (en) * 1990-09-07 1993-05-11 Ngk Spark Plug Co., Ltd. Outer electrode for spark plug and a method of manufacturing thereof
US20030038575A1 (en) * 2001-03-15 2003-02-27 Tsunenobu Hori Spark plug for an internal combustion engine
US20040041505A1 (en) * 2001-06-15 2004-03-04 Jochen Fischer Spark plug

Also Published As

Publication number Publication date
EP1837964A2 (en) 2007-09-26
CN101043125B (en) 2012-05-23
EP1837964B1 (en) 2014-02-12
CN101043125A (en) 2007-09-26

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Owner name: NITERRA CO., LTD., NAGOYA-SHI, JP

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