EP1938430B1 - Spark plug for motor vehicle internal combustion engine - Google Patents

Spark plug for motor vehicle internal combustion engine Download PDF

Info

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
German (de)
French (fr)
Other versions
EP1938430A1 (en
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/en
Application granted granted Critical
Publication of EP1938430B1 publication Critical patent/EP1938430B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H01T13/46—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.

Abstract

A spark plug for a motor vehicle internal combustion engine, substantially elongated in shape, and including: two coaxial electrodes of an inner central electrode and an outer base electrode enclosing the central electrode; and an electrically insulating annular block, interposed between the central electrode and the base electrode and including an annular shoulder. The insulating annual block includes an annular groove located at the shoulder.

Description

L'invention concerne une bougie d'allumage pour le moteur à combustion interne d'un véhicule automobile, de forme générale sensiblement allongée, comportant :

  • deux électrodes coaxiales : une électrode interne d'axe appelée électrode centrale et une électrode externe appelée culot entourant l'électrode centrale
  • un bloc isolant électriquement, appelé isolant interposé entre l'électrode centrale et le culot, de forme annulaire et possédant un épaulement annulaire.
The invention relates to a spark plug for the internal combustion engine of a motor vehicle, of substantially elongated overall shape, comprising:
  • two coaxial electrodes: an internal electrode of axis called central electrode and an external electrode called base surrounding the central electrode
  • an electrically insulating block, called an insulator interposed between the central electrode and the base, of annular shape and having an annular shoulder.

Les bougies à générations de plasma constituent des systèmes d'allumage multi-étincelles à haute fréquence, capables d'assurer dans les meilleures conditions l'allumage des moteurs à allumage commandé, tout en réduisant les émissions polluantes, notamment en mélange pauvre. Par contre, elles sont sujettes à l'encrassement, notamment à froid.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.

Comme toutes les bougies, elles sont caractérisées par un indice thermique. Cet indice thermique prend en compte leur comportement thermique sur des points de fonctionnement moteur particuliers. Il traduit notamment leur capacité à supporter des températures suffisamment élevées pour éliminer l'encrassement par pyrolyse, sans faire de « pré-allumage ».Like all candles, they are characterized by a thermal index. This thermal index takes into account their thermal behavior on particular engine operating points. It reflects in particular their ability to withstand temperatures high enough to eliminate fouling by pyrolysis, without doing "pre-ignition".

Par les publications FR2859830 , FR2859869 , FR2859831 , on connaît une bougie multi-étincelles dite froide, car elle ne monte pas suffisamment vite en température pour éviter l'encrassement. Sur de telles bougies, on a constaté en effet l'accumulation d'un dépôt de carbone sur l'isolant, qui réduit significativement l'isolation nécessaire entre la pointe de l'électrode centrale et le culot. Avec une mauvaise isolation, l'alimentation haute tension de la bougie risque alors d'être insuffisante, pour pouvoir provoquer les nécessaires « claquages », déclencheurs d'étincelles.By publications FR2859830 , FR2859869 , FR2859831 we know a so-called cold spark plug, because it does not rise quickly enough to prevent fouling. On such candles, there is indeed the accumulation of a carbon deposit on the insulator, which significantly reduces the necessary insulation between the tip of the central electrode and the base. With poor insulation, the high voltage supply of the candle may then be insufficient, to be able to cause the necessary "breakdowns", spark triggers.

Pour éviter la formation de dépôts carbonés, notamment à froid, sur l'isolant de la bougie exposé à l'atmosphère de la chambre de combustion, on peut chercher à augmenter la température de l'isolant, de manière à favoriser la destruction des dépôts par le phénomène de pyrolyse, dont l'efficacité dépend de la résistance thermique de l'ensemble de la bougie, y compris celle de l'isolant.To avoid the formation of carbonaceous deposits, especially cold, on the insulator of the candle exposed to the atmosphere of the combustion chamber, we can seek to increase the temperature of the insulator, so as to promote the destruction of deposits by the phenomenon of pyrolysis, the effectiveness of which depends on the thermal resistance of the whole of the candle, including that of the insulation.

Les mesures prises habituellement pour augmenter la température de l'isolant trouvent leur limite dans l'apparition de « pré-allumage » sur les bougies, lorsqu'elles atteignent des températures trop élevées en fonctionnement.The measures usually taken to increase the temperature of the insulation find their limit in the appearance of "pre-ignition" on the candles, when they reach temperatures too high in operation.

Afin de pallier ces inconvénients, l'invention vise à régler l'indice thermique d'une bougie multi-étincelles de façon à ce qu'elle se comporte comme une bougie très chaude lorsque le moteur est encore froid et qu'elle se comporte comme une bougie tiède lorsque le moteur est chaud.In order to overcome these drawbacks, 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.

L'invention vise à augmenter la température de peau de l'isolant tout en conservant ses propriétés isolantes électriquement.The invention aims to increase the skin temperature of the insulation while maintaining its electrically insulating properties.

A cet effet, l'invention propose une bougie du type cité ci-dessus, caractérisée en ce l'isolant comporte une rainure annulaire, située au niveau de l'épaulement.For this purpose, the invention proposes a candle of the type mentioned above, characterized in that the insulator comprises an annular groove, located at the shoulder.

Selon d'autres caractéristiques de l'invention, la rainure possède une section rectangulaire.According to other features of the invention, the groove has a rectangular section.

Selon d'autres caractéristiques de l'invention, la rainure possède une section triangulaire.According to other features of the invention, the groove has a triangular section.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description d'exemples de réalisation en référence aux figures annexées.

  • La figure 1 représente une vue en demi coupe d'une bougie multi-étincelles connue dans l'état de la technique.
  • La figure 2 représente une vue en demi coupe d'une bougie multi-étincelles selon un premier mode de réalisation de l'invention.
  • La figure 3 représente une vue en demi coupe d'une bougie multi-étincelles selon un second mode de réalisation de l'invention.
Other features and advantages of the invention will appear on reading the description of exemplary embodiments with reference to the appended figures.
  • The figure 1 represents a half-sectional view of a multi-spark spark plug known in the state of the art.
  • The figure 2 represents a half-sectional view of a multi-spark plug according to a first embodiment of the invention.
  • The figure 3 represents a half-sectional view of a multi-spark plug according to a second embodiment of the invention.

Des éléments identiques ou analogues sont désignés par les mêmes chiffres de référence.Identical or similar elements are designated by the same reference numerals.

Telle que représentée aux figures 1 , 2 et 3, une bougie muti-étincelles 1 comporte deux électrodes de génération de plasma coaxiales. Une électrode externe appelée culot 2 est destinée à être reliée à la masse. Elle entoure une électrode interne appelée électrode centrale 3, sensiblement cylindrique, d'axe de symétrie D, jouant le rôle d'électrode haute tension. Les matériaux des électrodes 2, 3 sont choisis dans un matériau conducteur tel qu'un alliage nickel.As represented in Figures 1, 2 and 3 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.

Un bloc électriquement isolant, appelé isolant 4 est placé entre le culot 2 et l'électrode centrale 3. Le culot 2 présente, sur la face extérieure de sa partie inférieure la plus proche de la culasse du moteur à combustion interne équipé de la bougie 1, une forme appropriée à la mise en place, au maintien et au serrage de la bougie 1 sur la culasse (par exemple et de manière non limitative, ainsi que représenté sur la figure 1 : un filetage). Le matériau d'isolation peut être choisi en céramique.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.

L'isolant 4 possède un épaulement 5 annulaire occultant toute la surface circulaire externe 6 du culot 2. L'épaulement 5 augmente la distance, en passant par le mélange gazeux, entre l'électrode centrale 3 et le culot, permettant d'éviter la création d'arc entre l'électrode centrale 3 et le culot 2.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.

Quelque soit le mode de réalisation de l'invention, l'épaulement 5 comporte une rainure 8 annulaire.Whatever the embodiment of the invention, the shoulder 5 has an annular groove 8.

Selon un premier mode de réalisation, telle que représentée à la figure 2, la rainure 8 annulaire possède une section rectangulaire.According to a first embodiment, as represented in figure 2 the annular groove 8 has a rectangular section.

Selon un second mode de réalisation, telle que représentée à la figure 3, la rainure 8 annulaire possède une section triangulaire.According to a second embodiment, as represented in figure 3 , the annular groove 8 has a triangular section.

De cette façon, une résistance thermique est créée au coeur de l'isolant et permet d'augmenter la température de peau de l'isolant 4. Cette rainure 8 est dimensionnée de telle façon que la rainure ne peut pas être obturée ce qui aurait pour conséquence la non élévation de la température de peau.In this way, a thermal resistance is created at the heart of the insulation and makes it possible to increase the skin temperature of the insulation 4. 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.

La rainure 8 dispose de deux paramètres : sa hauteur h et sa profondeur p.The groove 8 has two parameters: its height h and its depth p.

La hauteur h permet de rajouter une source de chaleur à l'intérieur de l'isolant 4. La hauteur h varie en fonction de la surface de collection de la chaleur ce qui permet de modifier la répartition des flux de chaleur entrant dans l'isolant.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. .

La profondeur p de la rainure 8 nous permet de régler la résistance thermique du système. En effet, les modifications de conductivité thermique longitudinale (selon l'axe D) permettent de faire varier les gradients de température dans la direction axiale et donc les répartitions de température.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.

La forme de la rainure 8 est illustrée aux figures 2 et 3 mais l'invention n'est pas limitative, d'autres formes peuvent être choisies de façon à augmenter la température de peau de l'isolant.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.

La rainure 8 permet de créer un étranglement dans l'isolant 4 et réduit ainsi sa conductivité thermique longitudinale. De plus, la rainure 8 augmente la surface apparente de l'isolant 4 pour un volume plus réduit. Cette surface est entièrement exposée à la flamme produite par la bougie ce qui conduit à un flux thermique plus important de la flamme vers l'isolant 4 et donc un réchauffement plus important de l'isolant 4. La rainure 8 n'empêche donc pas le dépôt de suies mais elle permet d'augmenter la température de l'isolant et un nettoyage par pyrolyse des suies.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.

Claims (4)

  1. Spark plug (1) for the internal combustion engine of a motor vehicle, of essentially elongated general shape, comprising:
    - two coaxial electrodes: an inner electrode with an axis (D) called a central electrode (3) and an outer electrode called a body (2) surrounding the central electrode (3); and
    - an electrically insulating block called an insulator (4), placed between the central electrode (3) and the body (2), of annular shape and having an annular shoulder (5), characterized in that the insulator (4) comprises an annular groove (8) located on the shoulder (5).
  2. Spark plug (1) according to Claim 1, characterized in that the groove (8) is a thermal resistance in the insulator (4).
  3. Spark plug (1) according to one of the preceding Claims 1 to 2, characterized in that the groove (8) has a rectangular cross section.
  4. Spark plug (1) according to one of the preceding Claims 1 to 2, characterized in that the groove (8) has a triangular cross section.
EP06831211A 2005-10-18 2006-09-21 Spark plug for motor vehicle internal combustion engine Not-in-force EP1938430B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0553149A FR2892240B1 (en) 2005-10-18 2005-10-18 IGNITION CANDLES FOR THE INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE
PCT/FR2006/050923 WO2007045776A1 (en) 2005-10-18 2006-09-21 Spark plug for motor vehicle internal combustion engine

Publications (2)

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

Family

ID=36587264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06831211A Not-in-force EP1938430B1 (en) 2005-10-18 2006-09-21 Spark plug for motor vehicle internal combustion engine

Country Status (12)

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

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009059649B4 (en) * 2009-12-19 2011-11-24 Borgwarner Beru Systems Gmbh HF ignition device
FR2965984B1 (en) * 2010-10-12 2012-10-12 Renault Sa PREVENTION AGAINST A SHORT CIRCUIT OF THE RF CANDLE
KR101868424B1 (en) * 2010-12-14 2018-06-18 페더럴-모굴 이그니션 컴퍼니 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 (en) 2017-03-31 2019-06-05 日本特殊陶業株式会社 Spark plug
EP3875967A1 (en) * 2020-03-04 2021-09-08 Sécheron SA High-voltage electrical device

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6132979A (en) * 1984-07-25 1986-02-15 株式会社デンソー Small-sized spark plug
FR2726864B1 (en) * 1994-11-15 1996-12-27 Sagem Allumage IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINE
JP3140006B2 (en) * 1998-06-11 2001-03-05 日本特殊陶業株式会社 Spark plug
JP4431271B2 (en) * 1999-12-13 2010-03-10 日本特殊陶業株式会社 Spark plug
DE10015916A1 (en) * 2000-03-30 2001-10-04 Bosch Gmbh Robert Spark plug for internal combustion engine, includes shaded zone on insulator foot in region of intermediate space, to provide shaded zone in radial direction
JP3887010B2 (en) * 2002-10-25 2007-02-28 日本特殊陶業株式会社 Spark plug for internal combustion engine
DE10329269B4 (en) * 2003-06-30 2005-12-29 Robert Bosch Gmbh Spark plug with at least two center electrodes
FR2859831B1 (en) * 2003-09-12 2009-01-16 Renault Sa GENERATION CANDLE OF PLASMA.
FR2859869B1 (en) 2003-09-12 2006-01-20 Renault Sa PLASMA GENERATION SYSTEM.
FR2859830B1 (en) 2003-09-12 2014-02-21 Renault Sas PLASMA GENERATION CANDLE WITH INTEGRATED INDUCTANCE.
FR2878086B1 (en) * 2004-11-16 2007-03-09 Renault Sas PLASMA RADIOFREQUENCY CANDLE
FR2887696B1 (en) * 2005-06-23 2007-08-24 Renault Sas IGNITION CANDLE FOR INTERNAL COMBUSTION ENGINE

Also Published As

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

Similar Documents

Publication Publication Date Title
EP1938430B1 (en) Spark plug for motor vehicle internal combustion engine
EP1869739B1 (en) Open-chamber multi-spark plug
CA2649998C (en) Arrangement of a semi-conductor-type spark plug in a combustion chamber of a gas turbine engine
US20090140623A1 (en) Spark plug
FR2919965B1 (en) SPARKLING IGNITION SPARK PLUG TO GIVE A TRANSVERSAL TOURBILLON THE FLOW FORM WANTED IN A COMBUSTION CHAMBER
CH624509A5 (en)
JP4625531B1 (en) Spark plug
JP4430724B2 (en) Spark plug
JP6077876B2 (en) Fouling resistant spark plug
JP5032556B2 (en) Spark plug
JP5386098B2 (en) Spark plug
FR2862445A1 (en) IGNITION CANDLE HAVING A PLURALITY OF CENTRAL ELECTRODES
WO2006131675A1 (en) High-frequency multispark plug
FR2542513A1 (en) Spark plug
EP2559119B1 (en) Spark plug provided with a means for preventing short circuits
CH549884A (en) SPARK PLUG.
MX2008004979A (en) Spark plug for motor vehicle internal combustion engine
JP5421473B2 (en) Spark plug
FR2641136A1 (en) Sparkplug of the high energy/low voltage type
FR2860929A1 (en) Spark plug for an internal combustion engine with improved seating in the cylinder head to provide more thermodynamic combustion and enhanced power output
EP1526618A1 (en) Surface discharge spark plug with a directed spark
BE515200A (en)
FR2779014A1 (en) Compact spark plug for IC engines with controlled ignition and particularly applicable to those employing direct injection systems
FR2921766A1 (en) IGNITION CANDLE COMPRISING AT LEAST ONE ELECTRODE WITH ELLIPSOIDAL END
BE479354A (en)

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

17P Request for examination filed

Effective date: 20080414

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

DAX Request for extension of the european patent (deleted)
GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REF Corresponds to:

Ref document number: 602006013857

Country of ref document: DE

Date of ref document: 20100602

Kind code of ref document: P

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20100421

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2344522

Country of ref document: ES

Kind code of ref document: T3

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20100421

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

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

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

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100821

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

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

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100526

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

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100823

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100722

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

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

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

26N No opposition filed

Effective date: 20110124

BERE Be: lapsed

Owner name: RENAULT S.A.S.

Effective date: 20100930

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

Ref country code: MC

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

Effective date: 20100930

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: BE

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

Effective date: 20100930

Ref country code: LI

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

Effective date: 20100930

Ref country code: CH

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

Effective date: 20100930

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

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101022

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

Ref country code: LU

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

Effective date: 20100921

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

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100421

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

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20100721

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 12

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

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

Ref country code: IT

Payment date: 20180925

Year of fee payment: 13

Ref country code: DE

Payment date: 20180920

Year of fee payment: 13

Ref country code: FR

Payment date: 20180925

Year of fee payment: 13

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

Ref country code: GB

Payment date: 20180919

Year of fee payment: 13

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

Ref country code: ES

Payment date: 20181022

Year of fee payment: 13

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602006013857

Country of ref document: DE

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

Ref country code: DE

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

Effective date: 20200401

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

Ref country code: IT

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

Effective date: 20190921

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

Effective date: 20190921

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: 20190930

Ref country code: GB

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

Effective date: 20190921

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20210128

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

Ref country code: ES

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

Effective date: 20190922