EP1938430B1 - Zündkerze für einen verbrennungsmotor eines kraftfahrzeugs - Google Patents

Zündkerze für einen verbrennungsmotor eines kraftfahrzeugs Download PDF

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Publication number
EP1938430B1
EP1938430B1 EP06831211A EP06831211A EP1938430B1 EP 1938430 B1 EP1938430 B1 EP 1938430B1 EP 06831211 A EP06831211 A EP 06831211A EP 06831211 A EP06831211 A EP 06831211A EP 1938430 B1 EP1938430 B1 EP 1938430B1
Authority
EP
European Patent Office
Prior art keywords
spark plug
groove
central electrode
insulator
internal combustion
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.)
Not-in-force
Application number
EP06831211A
Other languages
English (en)
French (fr)
Other versions
EP1938430A1 (de
Inventor
André AGNERAY
Marc Pariente
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP1938430A1 publication Critical patent/EP1938430A1/de
Application granted granted Critical
Publication of EP1938430B1 publication Critical patent/EP1938430B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01T13/46—Sparking plugs having two or more spark gaps
    • 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
    • H01T13/50—Sparking plugs having means for ionisation of gap
    • 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
    • H01T13/46—Sparking plugs having two or more spark gaps
    • H01T13/467—Sparking plugs having two or more spark gaps in parallel connection
    • 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
    • H01T13/52—Sparking plugs characterised by a discharge along a surface

Definitions

  • Plasma generation spark plugs are high-frequency, multi-spark ignition systems capable of providing spark-ignition engines with the best ignition conditions, while reducing pollutant emissions, especially in lean mixtures. By cons, they are subject to fouling, especially cold.
  • the invention aims to adjust the thermal index of a multi-spark plug so that it behaves like a very hot candle when the engine is still cold and behaves like a warm candle when the engine is hot.
  • the invention aims to increase the skin temperature of the insulation while maintaining its electrically insulating properties.
  • the invention proposes a candle of the type mentioned above, characterized in that the insulator comprises an annular groove, located at the shoulder.
  • the groove has a rectangular section.
  • the groove has a triangular section.
  • a muti-spark spark plug 1 comprises two coaxial plasma generation electrodes.
  • An external electrode called base 2 is intended to be connected to ground. It surrounds an internal electrode called central electrode 3, substantially cylindrical, axis of symmetry D, acting as a high voltage electrode.
  • the materials of the electrodes 2, 3 are chosen from a conductive material such as a nickel alloy.
  • An electrically insulating block, called insulator 4 is placed between the base 2 and the central electrode 3.
  • the base 2 has, on the outer face of its lower part closest to the cylinder head of the internal combustion engine equipped with the spark plug 1 , a form suitable for placing, holding and tightening the spark plug 1 on the cylinder head (for example and without limitation, as shown in FIG. figure 1 : a thread).
  • the insulation material can be chosen ceramic.
  • the insulator 4 has an annular shoulder concealing the entire outer circular surface 6 of the base 2.
  • the shoulder 5 increases the distance, through the gas mixture, between the central electrode 3 and the base, to avoid the arc creation between the central electrode 3 and the base 2.
  • the shoulder 5 has an annular groove 8.
  • the annular groove 8 has a rectangular section.
  • the annular groove 8 has a triangular section.
  • This groove 8 is dimensioned in such a way that the groove can not be blocked which would result in no elevation of the skin temperature.
  • the groove 8 has two parameters: its height h and its depth p.
  • the height h makes it possible to add a source of heat inside the insulator 4.
  • the height h varies according to the collection surface of the heat, which makes it possible to modify the distribution of the heat flows entering the insulation. .
  • the depth p of the groove 8 allows us to adjust the thermal resistance of the system. Indeed, changes in longitudinal thermal conductivity (along the axis D) make it possible to vary the temperature gradients in the axial direction and therefore the temperature distributions.
  • the shape of the groove 8 is illustrated in Figures 2 and 3 but the invention is not limiting, other forms may be chosen so as to increase the skin temperature of the insulation.
  • the groove 8 creates a constriction in the insulator 4 and thus reduces its longitudinal thermal conductivity. In addition, the groove 8 increases the apparent surface of the insulator 4 for a smaller volume. This surface is entirely exposed to the flame produced by the candle, which leads to a greater thermal flux from the flame to the insulation 4 and therefore a greater heating of the insulation 4. The groove 8 does not prevent the deposit of soot but it allows to increase the temperature of the insulator and cleaning by pyrolysis of soot.

Landscapes

  • Spark Plugs (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Fats And Perfumes (AREA)

Claims (4)

  1. Zündkerze (1) mit allgemein im Wesentlichen länglicher Form für den Verbrennungsmotor eines Kraftfahrzeugs, umfassend:
    - zwei koaxiale Elektroden: eine Innenelektrode mit einer Achse (D), die als Mittelelektrode (3) bezeichnet wird, und eine Außenelektrode, die als Körper (2) bezeichnet wird und die Mittelelektrode (3) umgibt,
    - einen elektrisch isolierenden Block, der als Isolierkörper (4) bezeichnet wird, zwischen der Mittelelektrode (3) und dem Körper (2) angeordnet ist, eine ringförmige Gestalt aufweist und eine ringförmige Schulter (5) hat, dadurch gekennzeichnet, dass der Isolierkörper (4) eine Ringnut (8) aufweist, die sich an der Schulter (5) befindet.
  2. Zündkerze (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Nut (8) ein Wärmewiderstand im Isolierkörper (4) ist.
  3. Zündkerze (1) nach einem der vorhergehenden Ansprüche 1 bis 2, dadurch gekennzeichnet, dass die Nut (8) einen rechteckigen Querschnitt besitzt.
  4. Zündkerze (1) nach einem der vorhergehenden Ansprüche 1 bis 2, dadurch gekennzeichnet, dass die Nut (8) einen dreieckigen Querschnitt besitzt.
EP06831211A 2005-10-18 2006-09-21 Zündkerze für einen verbrennungsmotor eines kraftfahrzeugs Not-in-force EP1938430B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0553149A FR2892240B1 (fr) 2005-10-18 2005-10-18 Bougies d'allumage pour le moteur a combustion interne d'un vehicule automobile
PCT/FR2006/050923 WO2007045776A1 (fr) 2005-10-18 2006-09-21 Bougie d'allumage pour le moteur a combustion interne d'un vehicule automobile

Publications (2)

Publication Number Publication Date
EP1938430A1 EP1938430A1 (de) 2008-07-02
EP1938430B1 true EP1938430B1 (de) 2010-04-21

Family

ID=36587264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06831211A Not-in-force EP1938430B1 (de) 2005-10-18 2006-09-21 Zündkerze für einen verbrennungsmotor eines kraftfahrzeugs

Country Status (12)

Country Link
US (1) US8040029B2 (de)
EP (1) EP1938430B1 (de)
JP (1) JP4970458B2 (de)
KR (1) KR101314761B1 (de)
CN (1) CN101292403B (de)
AT (1) ATE465536T1 (de)
BR (1) BRPI0617514A2 (de)
DE (1) DE602006013857D1 (de)
ES (1) ES2344522T3 (de)
FR (1) FR2892240B1 (de)
RU (1) RU2402127C2 (de)
WO (1) WO2007045776A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009059649B4 (de) * 2009-12-19 2011-11-24 Borgwarner Beru Systems Gmbh HF-Zündeinrichtung
FR2965984B1 (fr) * 2010-10-12 2012-10-12 Renault Sa Prevention contre un court-circuit de la bougie rf
WO2012091920A1 (en) * 2010-12-14 2012-07-05 Federal-Mogul Ignition Company Corona igniter having shaped insulator
US9088136B2 (en) 2012-03-23 2015-07-21 Federal-Mogul Ignition Company Corona ignition device with improved electrical performance
US10056738B2 (en) 2012-03-23 2018-08-21 Federal-Mogul Llc Corona ignition device with improved electrical performance
US10056737B2 (en) 2012-03-23 2018-08-21 Federal-Mogul Llc Corona ignition device and assembly method
JP6524136B2 (ja) 2017-03-31 2019-06-05 日本特殊陶業株式会社 点火プラグ
EP3875967A1 (de) * 2020-03-04 2021-09-08 Sécheron SA Hochspannungselektrogerät

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6132979A (ja) * 1984-07-25 1986-02-15 株式会社デンソー 小型点火プラグ
FR2726864B1 (fr) * 1994-11-15 1996-12-27 Sagem Allumage Organe d'allumage pour moteur a combustion interne
JP3140006B2 (ja) * 1998-06-11 2001-03-05 日本特殊陶業株式会社 スパークプラグ
JP4431271B2 (ja) * 1999-12-13 2010-03-10 日本特殊陶業株式会社 スパークプラグ
DE10015916A1 (de) * 2000-03-30 2001-10-04 Bosch Gmbh Robert Zündkerze
JP3887010B2 (ja) * 2002-10-25 2007-02-28 日本特殊陶業株式会社 内燃機関用スパークプラグ
DE10329269B4 (de) * 2003-06-30 2005-12-29 Robert Bosch Gmbh Zündkerze mit mindestens zwei Mittelelektroden
FR2859830B1 (fr) 2003-09-12 2014-02-21 Renault Sas Bougie de generation de plasma a inductance integree.
FR2859869B1 (fr) 2003-09-12 2006-01-20 Renault Sa Systeme de generation de plasma.
FR2859831B1 (fr) * 2003-09-12 2009-01-16 Renault Sa Bougie de generation de plasma.
FR2878086B1 (fr) * 2004-11-16 2007-03-09 Renault Sas Bougie a plasma radiofrequence
FR2887696B1 (fr) * 2005-06-23 2007-08-24 Renault Sas Bougie d'allumage pour moteur a combustion interne

Also Published As

Publication number Publication date
EP1938430A1 (de) 2008-07-02
US20080284303A1 (en) 2008-11-20
CN101292403B (zh) 2012-06-20
ATE465536T1 (de) 2010-05-15
WO2007045776A1 (fr) 2007-04-26
DE602006013857D1 (de) 2010-06-02
KR20080063316A (ko) 2008-07-03
RU2402127C2 (ru) 2010-10-20
BRPI0617514A2 (pt) 2011-07-26
FR2892240A1 (fr) 2007-04-20
FR2892240B1 (fr) 2010-10-22
CN101292403A (zh) 2008-10-22
KR101314761B1 (ko) 2013-10-08
US8040029B2 (en) 2011-10-18
JP2009512172A (ja) 2009-03-19
ES2344522T3 (es) 2010-08-30
JP4970458B2 (ja) 2012-07-04
RU2008119474A (ru) 2009-11-27

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