EP0478411A1 - Verbesserte Zündkerze für Verbrennungsmotor - Google Patents

Verbesserte Zündkerze für Verbrennungsmotor Download PDF

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Publication number
EP0478411A1
EP0478411A1 EP91402410A EP91402410A EP0478411A1 EP 0478411 A1 EP0478411 A1 EP 0478411A1 EP 91402410 A EP91402410 A EP 91402410A EP 91402410 A EP91402410 A EP 91402410A EP 0478411 A1 EP0478411 A1 EP 0478411A1
Authority
EP
European Patent Office
Prior art keywords
spark plug
central electrode
spark
electrode
connection
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
EP91402410A
Other languages
English (en)
French (fr)
Other versions
EP0478411B1 (de
Inventor
Michel Matesco
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.)
Sagem SA
Original Assignee
EYQUEM DITE Ste
Eyquem Dite Ste
EYQUEM SOC
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9400672&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0478411(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by EYQUEM DITE Ste, Eyquem Dite Ste, EYQUEM SOC filed Critical EYQUEM DITE Ste
Publication of EP0478411A1 publication Critical patent/EP0478411A1/de
Application granted granted Critical
Publication of EP0478411B1 publication Critical patent/EP0478411B1/de
Anticipated expiration legal-status Critical
Revoked 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
    • H01T13/02—Details
    • H01T13/04—Means providing electrical connection to sparking plugs

Definitions

  • the present invention relates to spark plugs for an internal combustion engine and relates more particularly to the means for connecting these spark plugs to the engine ignition circuit.
  • a spark plug generally has a central electrode and a ground electrode insulated from each other by a body made of insulating material such as ceramic, the two electrodes having two ends facing each other. which define a spark generation interval.
  • the spark plug At its opposite end intended to be connected to the ignition circuit, the spark plug has a connection terminal connected to the central electrode.
  • This terminal is generally made up of a standardized part produced up to now using two known techniques.
  • connection terminal is formed of a rod whose free end is threaded in accordance with ISO standard 1919-1982.
  • a connection piece consisting of a threaded nut or socket, in accordance with ISO standard 1919-1982.
  • the end rod of the electrode and the connection part are produced in one piece, by cold striking or by turning.
  • connection terminal produced according to the first technique has the drawback of being unscrewed frequently under the effect of the vibration stresses of the internal combustion engine.
  • connection terminal produced according to the second technique or "one-piece” connection terminal has the disadvantage, mainly in the technique of mounting so-called “hot” or “conductive cement” candles, of being coated with a layer of nickel oxidized, for example, which makes it particularly difficult to assemble and disassemble the spark plug electrical supply conductors.
  • the invention aims to remedy the drawbacks of the prior art by creating a connection terminal for a spark plug which, while being of reduced manufacturing cost, allows easy assembly and disassembly of the supply conductor and presents risks. reduced oxidation.
  • a spark plug for an internal combustion engine comprising a central electrode and at least one ground electrode defining between them a spark formation interval, the end of the central electrode opposite to the interval forming sparks in the form of a rod carrying a connection piece to an ignition circuit, characterized in that the connection piece made of metal which is a good conductor of electricity is force-fitted onto the rod end of the central electrode.
  • the external surface of the end rod of the central electrode has reliefs and the connection piece comprises a smooth bore force fitted onto the external surface provided with said reliefs.
  • a spark plug 1 having a metal base 2 provided with an external thread 3 for mounting the spark plug and a curved mass electrode 4 cooperating with a central electrode 5 to define a spark formation interval 6.
  • the ground electrode 4 isolated from the central electrode 5 by a sleeve 7 of insulating material such as ceramic.
  • the central electrode 5 At its end opposite to the spark formation interval 6, the central electrode 5 comprises a rod 8 which projects beyond the insulator 7 and which is intended to allow the connection of the spark plug to a circuit d 'ignition.
  • the rod 8 carries a connection piece 9 of standardized external profile, intended to cooperate with a split socket of complementary profile or with a clamp of a female connector fixed to the end of a conductor connecting the spark plug with the circuit. ignition (not shown).
  • the outer surface of the rod 8 has knurling 10 or other reliefs.
  • connection piece 9 has, as can be seen better in Fig.2, a central bore 11 smooth and blind, which opens at its free end in a hole 12 of larger diameter.
  • the bottom 13 of the central bore 11 also constitutes the bottom of a recess 14 provided at the end of the connection piece opposite the hole of larger diameter 12, which is intended to receive a touch of color used for locating the connection at its upper end.
  • the connecting piece is advantageously made by bar turning, cold stamping, foundry or other, in one of the usual materials such as Zamak, mild steel, brass, bronze or copper.
  • the connection piece 9 is fixed to the knurled rod 8 at the end of the central electrode of the spark plug by force fitting carried out by exerting a force on the top of the connection piece 9.
  • the connecting piece 9 however benefits from the elimination of the threading operation. This therefore results in a lower manufacturing cost.
  • a spark plug comprising a connection terminal of its central electrode produced according to the invention, responds particularly well to the new quality requirements of car manufacturers by allowing the use at low cost of connections made of good conductive materials such as brass.
  • connection part such as a threaded part without having the disadvantages.

Landscapes

  • Spark Plugs (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
EP91402410A 1990-09-26 1991-09-10 Verbesserte Zündkerze für Verbrennungsmotor Revoked EP0478411B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9011879A FR2667201B1 (fr) 1990-09-26 1990-09-26 Bougie d'allumage perfectionnee pour moteur a combustion interne.
FR9011879 1990-09-26

Publications (2)

Publication Number Publication Date
EP0478411A1 true EP0478411A1 (de) 1992-04-01
EP0478411B1 EP0478411B1 (de) 1995-11-22

Family

ID=9400672

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91402410A Revoked EP0478411B1 (de) 1990-09-26 1991-09-10 Verbesserte Zündkerze für Verbrennungsmotor

Country Status (12)

Country Link
US (1) US5258684A (de)
EP (1) EP0478411B1 (de)
JP (1) JPH05343155A (de)
AT (1) ATE130707T1 (de)
CS (1) CS292391A3 (de)
DE (1) DE69114806T2 (de)
DK (1) DK0478411T3 (de)
ES (1) ES2083544T3 (de)
FR (1) FR2667201B1 (de)
GR (1) GR3018880T3 (de)
HU (1) HU215814B (de)
IE (1) IE71190B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011015427A3 (de) * 2009-08-03 2011-10-20 Robert Bosch Gmbh Zündspule, zündkerze und zündanordnung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5918571A (en) * 1996-02-16 1999-07-06 Allied Signal Inc. Dual electrode high thread spark plug
US5697334A (en) * 1996-02-16 1997-12-16 Alliedsignal Inc. Spark plug with integral retainer nut
US6495948B1 (en) 1998-03-02 2002-12-17 Pyrotek Enterprises, Inc. Spark plug

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1635186A (en) * 1921-04-25 1927-07-12 Corning Glass Works Spark plug
US1996421A (en) * 1930-03-13 1935-04-02 Hurley Townsend Corp Spark plug
US3370331A (en) * 1963-04-01 1968-02-27 Zeller Corp Sparkplug and process of manufacturing the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2292216A (en) * 1939-06-29 1942-08-04 James A Doran Spark plug
JPS5337881B2 (de) * 1973-11-15 1978-10-12
DE7726104U1 (de) * 1977-08-23 1977-12-01 Siemens Ag, 1000 Berlin Und 8000 Muenchen Elektrisches Schaltwerk
JPS62150680A (ja) * 1985-12-24 1987-07-04 株式会社デンソー 点火プラグ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1635186A (en) * 1921-04-25 1927-07-12 Corning Glass Works Spark plug
US1996421A (en) * 1930-03-13 1935-04-02 Hurley Townsend Corp Spark plug
US3370331A (en) * 1963-04-01 1968-02-27 Zeller Corp Sparkplug and process of manufacturing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011015427A3 (de) * 2009-08-03 2011-10-20 Robert Bosch Gmbh Zündspule, zündkerze und zündanordnung
US9194359B2 (en) 2009-08-03 2015-11-24 Robert Bosch Gmbh Ignition coil, spark plug, and ignition set-up including an ignition coil and spark plug

Also Published As

Publication number Publication date
DE69114806D1 (de) 1996-01-04
EP0478411B1 (de) 1995-11-22
IE71190B1 (en) 1997-02-12
HU913034D0 (en) 1992-01-28
JPH05343155A (ja) 1993-12-24
HU215814B (hu) 1999-02-01
DK0478411T3 (da) 1995-12-18
ES2083544T3 (es) 1996-04-16
ATE130707T1 (de) 1995-12-15
FR2667201B1 (fr) 1996-09-20
CS292391A3 (en) 1992-04-15
FR2667201A1 (fr) 1992-03-27
US5258684A (en) 1993-11-02
IE913367A1 (en) 1992-04-08
GR3018880T3 (en) 1996-05-31
HUT58956A (en) 1992-03-30
DE69114806T2 (de) 1996-05-02

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