EP0478411B1 - Verbesserte Zündkerze für Verbrennungsmotor - Google Patents

Verbesserte Zündkerze für Verbrennungsmotor Download PDF

Info

Publication number
EP0478411B1
EP0478411B1 EP91402410A EP91402410A EP0478411B1 EP 0478411 B1 EP0478411 B1 EP 0478411B1 EP 91402410 A EP91402410 A EP 91402410A EP 91402410 A EP91402410 A EP 91402410A EP 0478411 B1 EP0478411 B1 EP 0478411B1
Authority
EP
European Patent Office
Prior art keywords
central electrode
spark plug
spark
rod
connection piece
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.)
Revoked
Application number
EP91402410A
Other languages
English (en)
French (fr)
Other versions
EP0478411A1 (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 SOC
Sagem SA
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(B1) "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 SOC, Sagem SA 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

Links

Images

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 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 made up to now according to 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.
  • a spark plug provided with a central electrode and at least one ground electrode defining between them a spark formation interval, the end of the central electrode opposite the spark-forming interval in the form of a rod carrying a connection piece to an ignition circuit.
  • the connection piece made of metal which is a good conductor of electricity is rigidly fixed on the end rod of the central electrode.
  • the end rod of the electrode and the connection piece 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 “monoblock” 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 oxidized nickel, 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 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 being rigidly fixed on the rod d end of the central electrode, characterized in that 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.
  • connection 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)

Claims (3)

  1. Zündkerze für einen Verbrennungsmotor mit einer Mittelelektrode (5) und mindestens einer Masseelektrode (4), welche untereinander einen Zwischenraum (6) für die Erzeugung von Zündfunken bilden, wobei das dem Zwischenraum für die Erzeugung von Zündfunken gegenüberliegende Endstück (8) der Mittelelektrode (5) die Form eines Stiftes (9) hat, welcher ein Teil für den Anschluß an einen Zündstromkreis trägt, wobei das aus einem elektrisch gut leitenden Metall hergestellte Anschlußstück fest an dem Endstift (8) der Mittelelektrode befestigt ist, dadurch gekennzeichnet, daß die Außenfläche des Endstiftes (8) der Mittelelektrode (5) ein Profil und das Anschlußstück eine glatte Bohrung (11) aufweist, welche auf diese Außenfläche aufgeschrumpft wird.
  2. Zündkerze nach Anspruch 1, dadurch gekennzeichnet, daß das Profil auf der Außenfläche des Endstiftes (8) der Mittelelektrode durch eine Rändelung gebildet wird.
  3. Zündkerze nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Bohrung (11) des Anschlußstückes ein Sackloch ist und ihr Grund (13) ebenfalls den Grund einer Aussparung (14) für die Aufnahme einer Positionierungsmarkierung bildet.
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 EP0478411A1 (de) 1992-04-01
EP0478411B1 true 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)

Families Citing this family (4)

* 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
DE102009035897A1 (de) 2009-08-03 2011-02-10 Robert Bosch Gmbh Zündspule, Zündkerze sowie Zündanordnung umfassend eine Zündspule und -kerze

Family Cites Families (7)

* 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
US2292216A (en) * 1939-06-29 1942-08-04 James A Doran Spark plug
US3370331A (en) * 1963-04-01 1968-02-27 Zeller Corp Sparkplug and process of manufacturing the same
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

Also Published As

Publication number Publication date
DE69114806T2 (de) 1996-05-02
US5258684A (en) 1993-11-02
ATE130707T1 (de) 1995-12-15
HU215814B (hu) 1999-02-01
ES2083544T3 (es) 1996-04-16
DE69114806D1 (de) 1996-01-04
GR3018880T3 (en) 1996-05-31
DK0478411T3 (da) 1995-12-18
HUT58956A (en) 1992-03-30
EP0478411A1 (de) 1992-04-01
FR2667201A1 (fr) 1992-03-27
JPH05343155A (ja) 1993-12-24
CS292391A3 (en) 1992-04-15
IE71190B1 (en) 1997-02-12
HU913034D0 (en) 1992-01-28
IE913367A1 (en) 1992-04-08
FR2667201B1 (fr) 1996-09-20

Similar Documents

Publication Publication Date Title
US5918571A (en) Dual electrode high thread spark plug
CA2623079A1 (en) Composite conductor, in particular for glow plugs for diesel engines
US6104130A (en) Radial gap high thread spark plug
WO2009097267A2 (en) High thread ground shield
EP2553779B1 (de) Zündkerze mit tiefem gewinde und unterschnittenem isolator
EP0478411B1 (de) Verbesserte Zündkerze für Verbrennungsmotor
US8384278B2 (en) Leadless package housing having an insulator and composition
US6759796B2 (en) Compact spark plug and method for its production
FR2894724A1 (fr) Dispositif pour l'indexation angulaire d'une bougie de moteur a combustion
US7023127B2 (en) Multi-point spark plug
EP2210079A2 (de) Vergaservorrichtung mit eingebautem verbrennungssensor
KR20090118216A (ko) 변압기용 부싱
KR20110124257A (ko) 연소 센서를 구비한 스파크 플러그
JP4425741B2 (ja) スパークプラグおよびそれを備えた内燃機関
FR2758661A1 (fr) Dispositif de raccordement mecanique et de connexion electrique
FR2478882A1 (fr) Fiche coaxiale femelle
FR2627018A1 (fr) Embout de raccordement electrique
JP4469855B2 (ja) 交換可能な端子接点を有する点火リード線
FR2716938A3 (fr) Bobine d'allumage pour moteur à combustion interne.
JP5049522B2 (ja) 電気機器の碍子形端子
EP0328467A1 (de) Elektrische Verbindungshülse
FR2805093A1 (fr) Bougie d'allumage et son procede de fabrication
JP2004092412A (ja) 内燃機関用点火装置
JPH03247916A (ja) セラミックグロープラグ
FR2847709A1 (fr) Bobine-baton d'allumage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19920904

17Q First examination report despatched

Effective date: 19940809

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

REF Corresponds to:

Ref document number: 130707

Country of ref document: AT

Date of ref document: 19951215

Kind code of ref document: T

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19951117

REF Corresponds to:

Ref document number: 69114806

Country of ref document: DE

Date of ref document: 19960104

ITF It: translation for a ep patent filed

Owner name: INVENTION S.N.C.

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2083544

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3018880

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: ROBERT BOSCH GMBH

Effective date: 19960812

NLR1 Nl: opposition has been filed with the epo

Opponent name: ROBERT BOSCH GMBH

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: SAGEM S.A.

NLT2 Nl: modifications (of names), taken from the european patent patent bulletin

Owner name: SAGEM S.A.

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

PLBO Opposition rejected

Free format text: ORIGINAL CODE: EPIDOS REJO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APAE Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOS REFNO

APAE Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOS REFNO

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20010820

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20010821

Year of fee payment: 11

Ref country code: AT

Payment date: 20010821

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20010822

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 20010830

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010904

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20010912

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20010914

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20010921

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20010928

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20011003

Year of fee payment: 11

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020910

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020910

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020911

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020911

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020911

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020930

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020930

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020930

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: SAGEM S.A.

BERE Be: lapsed

Owner name: *EYQUEM

Effective date: 20020930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030404

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20020910

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030603

APBU Appeal procedure closed

Free format text: ORIGINAL CODE: EPIDOSNNOA9O

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

RDAF Communication despatched that patent is revoked

Free format text: ORIGINAL CODE: EPIDOSNREV1

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 20030718

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO