EP1869739B1 - Mehrfach-zündkerze mit offener kammer - Google Patents

Mehrfach-zündkerze mit offener kammer Download PDF

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Publication number
EP1869739B1
EP1869739B1 EP06726308A EP06726308A EP1869739B1 EP 1869739 B1 EP1869739 B1 EP 1869739B1 EP 06726308 A EP06726308 A EP 06726308A EP 06726308 A EP06726308 A EP 06726308A EP 1869739 B1 EP1869739 B1 EP 1869739B1
Authority
EP
European Patent Office
Prior art keywords
spark plug
chamber
insulator
plug according
shell
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
EP06726308A
Other languages
English (en)
French (fr)
Other versions
EP1869739A1 (de
Inventor
Nadim Malek
André AGNERAY
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 EP1869739A1 publication Critical patent/EP1869739A1/de
Application granted granted Critical
Publication of EP1869739B1 publication Critical patent/EP1869739B1/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
    • H01T13/50—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
    • H01T13/52—Sparking plugs characterised by a discharge along a surface

Definitions

  • the present invention relates to a spark plug for plasma generation, used in particular for igniting internal combustion engines by electric spark between the electrodes of a candle.
  • a radiofrequency spark plug of an internal combustion engine comprising two plasma generation electrodes separated by an insulator, one of the two electrodes may consist of all of the yoke and the base of the candle.
  • Plasma-generation spark plugs are high-frequency multi-spark ignition systems, capable of ensuring the ignition of spark ignition engines under the best conditions, while reducing pollutant emissions, particularly in lean mixtures. They are subject to fouling, especially cold.
  • a spark plug according to the preamble of claim 1 is known from the document WO-A-0120162 .
  • the present invention aims to adjust the thermal index of a multi-spark plug, so that it can quickly rise in temperature, without subsequent risk of pre-ignition.
  • the chamber is disposed between the base and the insulator.
  • the chamber may contain a dilation piece capable of opening or closing its inlet to hot gases.
  • the measures proposed make it possible to limit the cooling of the ceramic in the starting phase without increasing its operating temperature. This gives a non-linear thermal index, which corresponds to rapid heating of the candle without the risk of hot pre-ignition.
  • a spark plug 1 of known type comprising two electrodes 2, 3 for generating plasma separated by an insulator 4 of dielectric material such as a ceramic.
  • the two electrodes 2, 3 constitute respectively an outer cap 3 surrounding the insulator, and a central electrode 2, housed in a central bore of the insulator 4.
  • the base 3 conventionally has an external thread 3a for screwing the candle in the cylinder head of the engine.
  • carbon deposits disturb the operation of the candle, creating areas of current leakage. From a certain temperature, of the order of 400 ° C, the carbonaceous deposits are destroyed by pyrolysis.
  • the candle of the figure 2 additionally has a dead volume 6, constituting an open chamber to the outside.
  • the chamber 6 extends between the base 3 and the insulator 4.
  • the chamber may advantageously have a first tubular sector 6a connected to a second circular sector 6b open on the outside.
  • the walls of the chamber 6 may be metallized.
  • the layer, or metal sleeve 7, applied to the insulator, is then in direct contact with the hot gases, and particularly oxidants in lean mixture ("lean burn "), of the combustion chamber.
  • the metallization of the walls of the chamber 6 makes it possible in particular to prevent the creation of a plasma between the ceramic of the insulator and the base.
  • This metal layer 7 may for example consist of a sleeve brazed to the ceramic, which will ensure the resistance thereof to the oxidizing gases.
  • the thickness of the sleeve may be a compromise between its resistance to thermochemical erosion, its thermal resistance and its cost of production.
  • the sleeve may itself be protected by an inert deposition, a thin ceramic layer, or other metal deposit particularly resistant to oxidation, such as nickel.
  • the figure 3 illustrates a second embodiment of the invention, according to which the chamber 6 is a simple tubular opening formed in the mass of the base 3.
  • the chamber no longer extends between the base and the insulator, as previously but constitutes a cut in the mass of the base.
  • the application of a metal layer 7 is imperative to avoid the formation of a plasma.
  • the metallization will be applied simply on the bonding interface between the ceramic 4 and the base 3, independently of the chamber 6.
  • the Figures 4A to 5B illustrate additional provisions for automatically adapting the behavior of the chamber to the temperature conditions of the candle, so as to further improve the "non-linear" setting of the thermal index of the candle, particularly for that it behaves like a very hot candle when the engine is still cold, and like a warm candle, when the engine is hot, especially under heavy load.
  • the chamber 6 may contain a dilation piece 8, 9 capable of opening or closing its inlet to hot gases.
  • the expansion chamber is contracted, and opens the passage to hot gases that provide a thermal flow accelerating the operation of the candle.
  • the room is expanded and closes the hot gas passage.
  • the candle reaches its thermal equilibrium at a lower temperature than if the chamber had remained open.
  • the expansion piece 8 is a corrugated sleeve, one end is fixed and the other end carries a cylindrical flap 8a closing the inlet of the chamber 6 when the sleeve is expanded.
  • the expansion piece 9 is a double wall sleeve containing a metal 9a, fuse at relatively low temperature: the expansion of the liquid metal 9a causes the sleeve 9 to swell, thus blocking the passage of hot gases.

Landscapes

  • Ignition Installations For Internal Combustion Engines (AREA)
  • Spark Plugs (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Claims (11)

  1. Hochfrequenz-Zündkerze (1) einer Brennkraftmaschine, die zwei Elektroden (2, 3) für die Erzeugung von Plasma enthält, die durch einen Isolator (4) getrennt sind, wobei die zwei Elektroden einen äußeren Sockel (3), der eine Umfangsoberfläche des Isolators umgibt, und eine Mittelelektrode (2), die sich in einer Mittelbohrung des Isolators befindet, bilden und auf dem gesamten Umfang des Sockels (3) eine Öffnung (6) aufweise, die sich in Tiefenrichtung in axialer Richtung erstreckt und in die Brennkammer des Motors mündet, dadurch gekennzeichnet, dass die Umfangsoberfläche des Isolators mit Metall beschichtet ist und dass die Kammer, die eine Wärmeregulierungskammer bildet, in dem Sockel angeordnet ist oder zwischen dem Sockel und einer mit Metall beschichteten Fläche des Isolators angeordnet ist.
  2. Kerze nach Anspruch 1, dadurch gekennzeichnet, dass ein Teil der Kammer zu einem Gewindeabschnitt des Sockels konzentrisch ist.
  3. Kerze nach Anspruch 2, wobei die Kammer wischen dem Sockel und einer mit Metall beschichteten Fläche des Isolators ausgespart ist und einen ersten röhrenförmigen Abschnitt (6a) aufweist, der mit einem zweiten kreisförmigen Abschnitt (6b), der nach außen offen ist, verbunden ist.
  4. Kerze nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass alle Wände der Kammer (6) mit Metall beschichtet sind.
  5. Kerze nach Anspruch 1, dadurch gekennzeichnet, dass die Kammer (6) eine einfache röhrenförmige Öffnung ist, die in der Masse des Sockels (3) ausgespart ist.
  6. Kerze nach Anspruch 5, dadurch gekennzeichnet, dass die Grenzfläche zwischen dem Sockel (3) und dem Isolator (4) mit Metall beschichtet ist.
  7. Kerze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Beschichtung mit Metall durch Löten einer metallischen Muffe (7) mit geringer Dicke auf die Keramik erhalten wird.
  8. Kerze nach Anspruch 1 bis 4 oder nach Anspruch 1 bis 4, kombiniert mit Anspruch 7, dadurch gekennzeichnet, dass die Metallbeschichtung (7) durch einen Niederschlag geschützt ist, der oxidierenden Atmosphären bei hoher Temperatur widersteht.
  9. Kerze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kammer (6) ein Ausdehnungsteil (8, 9) einschließt, das seinen Einlass für heiße Gase öffnen oder schließen kann.
  10. Kerze nach Anspruch 9, dadurch gekennzeichnet, dass das Ausdehnungsteil (8) eine gewellte Muffe ist, wovon ein Ende fest ist und das andere Ende eine Klappe (8a) trägt, die den Einlass der Kammer (6) verschließt, wenn die Muffe ausgedehnt ist.
  11. Kerze nach Anspruch 9, dadurch gekennzeichnet, dass das Ausdehnungsteil (9) eine Doppelwandmuffe ist, die ein Metall (9a) umschließt, das bei verhältnismäßig niedriger Temperatur schmilzt, dessen Ausdehnung ein Anschwellen der Muffe bewirkt, derart, dass der Einlass für heiße Gase blockiert ist.
EP06726308A 2005-04-08 2006-04-05 Mehrfach-zündkerze mit offener kammer Not-in-force EP1869739B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0550905A FR2884365B1 (fr) 2005-04-08 2005-04-08 Bougie multi-etincelles a chambre ouverte
PCT/FR2006/050302 WO2006106267A1 (fr) 2005-04-08 2006-04-05 Bougie multi-etincelles a chambre ouverte

Publications (2)

Publication Number Publication Date
EP1869739A1 EP1869739A1 (de) 2007-12-26
EP1869739B1 true EP1869739B1 (de) 2011-09-07

Family

ID=35431178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06726308A Not-in-force EP1869739B1 (de) 2005-04-08 2006-04-05 Mehrfach-zündkerze mit offener kammer

Country Status (10)

Country Link
US (2) US7928642B2 (de)
EP (1) EP1869739B1 (de)
JP (1) JP4841619B2 (de)
KR (1) KR20070120575A (de)
CN (1) CN101189771B (de)
AT (1) ATE523931T1 (de)
BR (1) BRPI0609731A2 (de)
ES (1) ES2371030T3 (de)
FR (1) FR2884365B1 (de)
WO (1) WO2006106267A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014112674A1 (de) 2013-10-24 2015-05-13 Borgwarner Ludwigsburg Gmbh Korona-Zündeinrichtung

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7944135B2 (en) * 2008-08-29 2011-05-17 Federal-Mogul Ignition Company Spark plug and methods of construction thereof
DE102009059649B4 (de) * 2009-12-19 2011-11-24 Borgwarner Beru Systems Gmbh HF-Zündeinrichtung
EP2652847B2 (de) * 2010-12-14 2019-03-06 Federal-Mogul Ignition Company Koronazünder mit verbesserter koronasteuerung
WO2012092432A1 (en) * 2010-12-29 2012-07-05 Federal-Mogul Ignition Company Corona igniter having improved gap control
US8749126B2 (en) 2011-06-27 2014-06-10 Federal-Mogul Ignition Company Corona igniter assembly including corona enhancing insulator geometry
US10056738B2 (en) 2012-03-23 2018-08-21 Federal-Mogul Llc Corona ignition device with improved electrical performance
US9088136B2 (en) 2012-03-23 2015-07-21 Federal-Mogul Ignition Company Corona ignition device with improved electrical performance
US10056737B2 (en) 2012-03-23 2018-08-21 Federal-Mogul Llc Corona ignition device and assembly method
US9531167B2 (en) 2014-06-02 2016-12-27 Nxp Usa, Inc. Device and method for connecting an RF generator to a coaxial conductor
US9518555B2 (en) * 2014-12-04 2016-12-13 Freescale Semiconductor, Inc. Radiation devices
KR20180042345A (ko) * 2015-08-20 2018-04-25 페더럴-모걸 엘엘씨 코로나 점화 장치 및 조립 방법
KR101786238B1 (ko) 2015-12-09 2017-10-18 현대자동차주식회사 스파크 플러그
WO2018034943A1 (en) * 2016-08-18 2018-02-22 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
MY196171A (en) * 2017-05-05 2023-03-17 Streamer Electric Company Inc Arrester With Pressurizing Chambers
RO135550A2 (ro) 2020-08-10 2022-02-28 Universitatea Tehnică "Gheorghe Asachi" Din Iaşi Bujie cu descărcare dublă

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US2902747A (en) * 1959-09-08 Reiter
US2493743A (en) * 1948-09-10 1950-01-10 Gen Electric Air-cooled spark plug
BE562518A (de) * 1957-04-29
US3440870A (en) * 1966-08-24 1969-04-29 Joseph Leto Power indicating device
JPS56156465A (en) * 1980-05-01 1981-12-03 Nissan Motor Co Ltd Igniter for diesel engine
US4841925A (en) * 1986-12-22 1989-06-27 Combustion Electromagnetics, Inc. Enhanced flame ignition for hydrocarbon fuels
DE4331269C2 (de) * 1993-09-15 1995-07-13 Bosch Gmbh Robert Verfahren zur Herstellung einer Zündkerze mit Gleitfunkenstrecke und nach den Verfahren hergestellte Zündkerzen
WO2001020162A1 (en) * 1999-09-15 2001-03-22 Knite, Inc. Ignition system for stratified fuel mixtures
FR2859830B1 (fr) * 2003-09-12 2014-02-21 Renault Sas Bougie de generation de plasma a inductance integree.
FR2859831B1 (fr) * 2003-09-12 2009-01-16 Renault Sa Bougie de generation de plasma.
FR2859869B1 (fr) * 2003-09-12 2006-01-20 Renault Sa Systeme de generation de plasma.
JP2005116513A (ja) * 2003-09-16 2005-04-28 Denso Corp スパークプラグ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014112674A1 (de) 2013-10-24 2015-05-13 Borgwarner Ludwigsburg Gmbh Korona-Zündeinrichtung
US9525272B2 (en) 2013-10-24 2016-12-20 Borgwarner Ludwigsburg Gmbh Corona ignition device

Also Published As

Publication number Publication date
US8294346B2 (en) 2012-10-23
KR20070120575A (ko) 2007-12-24
BRPI0609731A2 (pt) 2011-10-18
US20110163654A1 (en) 2011-07-07
US7928642B2 (en) 2011-04-19
FR2884365B1 (fr) 2013-10-11
US20090189504A1 (en) 2009-07-30
ES2371030T3 (es) 2011-12-26
WO2006106267A1 (fr) 2006-10-12
JP2008535195A (ja) 2008-08-28
ATE523931T1 (de) 2011-09-15
EP1869739A1 (de) 2007-12-26
JP4841619B2 (ja) 2011-12-21
FR2884365A1 (fr) 2006-10-13
CN101189771B (zh) 2012-06-27
CN101189771A (zh) 2008-05-28

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