EP2517323B1 - Bougie d'allumage munie d'un trou pour le réglage - Google Patents

Bougie d'allumage munie d'un trou pour le réglage Download PDF

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Publication number
EP2517323B1
EP2517323B1 EP10798461.9A EP10798461A EP2517323B1 EP 2517323 B1 EP2517323 B1 EP 2517323B1 EP 10798461 A EP10798461 A EP 10798461A EP 2517323 B1 EP2517323 B1 EP 2517323B1
Authority
EP
European Patent Office
Prior art keywords
spark plug
ground electrode
opening
wall
electrode
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.)
Active
Application number
EP10798461.9A
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German (de)
English (en)
Other versions
EP2517323A1 (fr
Inventor
Jochen Fuchs
Markus Kraus
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.)
Innio Jenbacher GmbH and Co OG
Original Assignee
GE Jenbacher GmbH and Co OHG
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Application filed by GE Jenbacher GmbH and Co OHG filed Critical GE Jenbacher GmbH and Co OHG
Publication of EP2517323A1 publication Critical patent/EP2517323A1/fr
Application granted granted Critical
Publication of EP2517323B1 publication Critical patent/EP2517323B1/fr
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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
    • H01T13/54—Sparking plugs having electrodes arranged in a partly-enclosed ignition chamber
    • 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
    • H01T21/00—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs
    • H01T21/06—Adjustment of spark gaps

Definitions

  • the invention relates to a spark plug having a center electrode and a ground electrode, wherein the center electrode is arranged to the ground electrode so that the spark gap between the ground electrode and center electrode extends, wherein the spark gap is surrounded by a wall. Furthermore, the invention relates to a method for adjusting the distance from the center electrode to the ground electrode of such a spark plug.
  • Spark plugs conduct ignition current into the combustion chamber of an internal combustion engine and ignite the fuel-air mixture there by a spark that spins over between the electrodes (in the so-called spark gap).
  • spark gap In gas engines with high power and large combustion chambers, high temperatures occur. Gas engines are increasingly being used to provide an antechamber.
  • the pre-chamber is formed significantly smaller compared to the actual combustion chamber and is separated from the combustion chamber by a wall, with smaller transfer openings are provided, which allow a fluid exchange between the combustion chamber and prechamber.
  • the actual ignition with the spark plug takes place in the pre-chamber, where a relatively rich fuel-air mixture is ignited there with the spark plug, the resulting ignition torches over the transfer openings in the actual combustion chamber and there pass a relatively lean fuel-air mixture ignite.
  • a spark plug according to the preamble of claim 1 is made EP 1 517 416 A2 known.
  • Object of the present invention is therefore to improve the possibility of adjusting the distance between the center electrode and the ground electrode in a spark plug of the type mentioned.
  • the basic idea is therefore to use the spark gap, e.g. along or parallel to the longitudinal axis of the spark plug and making it accessible from the side of the spark plug. It is deliberately accepted that the wall surrounding the ground electrode and center electrode is weakened by the recess or opening. The spark gap then preferably extends along or parallel to the longitudinal axis of the spark plug. The spark gap is that distance between ground electrode and center electrode in which the spark skips.
  • the feature that surrounds the wall of the spark gap it is understood that the spark gap in the radial direction is either completely surrounded by the wall or where no wall is surrounded by the body or housing of the spark plug.
  • the weakening of the wall is less significant when a mounting portion for fixing the spark plug is provided in a combustion chamber housing of an internal combustion engine, wherein the recess or opening in the installed state of the spark plug in the combustion chamber housing is completely covered by the combustion chamber housing.
  • the attachment portion comprises an external thread and that the wall at least partially carries the external thread.
  • the opening is arranged in the region of the external thread.
  • An advantageous embodiment of the invention provides that the ground electrode is secured to the wall via a web.
  • the web extends substantially perpendicular to the longitudinal axis of the spark plug.
  • the opening is arranged on the opposite side of the attachment point of the web on the wall in the wall.
  • Wall, web and ground electrode can be permanently connected to each other, for example, welded or formed integrally formed or otherwise permanently connected to each other.
  • the wall in the region of the opening has a cross-section which is substantially annular, wherein the recess or opening extends over a range of 3 to 10%, preferably 5 to 7% along the outer circumference of the circle. In this way, the wall is only minimally weakened.
  • not only one but a plurality of openings may be provided.
  • the shape of the at least one opening is adapted in the simplest case to the distance gauge. It can e.g. be formed circular, square, rectangular or polygonal.
  • the longitudinal extent of the opening along the spark gap is between the single and double distance between the center electrode and the ground electrode.
  • the aforementioned advantageous embodiment with prechamber ignition is often achieved in that the prechamber is introduced into the combustion chamber as a separate component. In the present case, however, it would be appropriate to make the antechamber directly to the spark plug. It can therefore be provided that a preferably dome-shaped cover is provided on the front side, which covers the Mass electrode and center electrode in the installed state separates from the combustion chamber of the internal combustion engine, wherein transfer openings are provided in the cover.
  • Such an embodiment would also have the advantage that no conversion measures of the internal combustion engine would be required to switch from a "normal" combustion chamber ignition to an antechamber ignition.
  • the invention relates to a method for adjusting the distance between a center electrode and a ground electrode in a spark plug of the aforementioned type.
  • the method is characterized in that over the opening, a distance gauge having a thickness which is the desired distance from the ground electrode Center electrode is inserted, and the ground electrode is pressed to the center electrode until the distance from the center electrode to the ground electrode corresponds to the thickness of the distance gauge.
  • Fig. 1 a a side view of a spark plug 1 according to the invention.
  • the Fig. 1b shows an oblique view of the spark plug 1
  • the Fig. 1c a view of the front side of the spark plug 1
  • the Fig. 1 d is a cross section along the plane EE of the view of Fig. 1a
  • the spark plug 1 will be explained with reference to the four views.
  • the spark plug 1 comprises an insulator body 12, which is usually formed of ceramic.
  • a connector 10 which is electrically conductive and is connected to an ignition coil or the like.
  • the connector 10 supplies the voltage to the center electrode 2, which extends in the interior of the ceramic body to the front side, where the center electrode 2 protrudes from the insulator body 12.
  • the spark plug 1 further has a screw-in approach 14, usually in the form of a hexagon for screwing the spark plug 1 in the combustion chamber housing (schematically with 36 shown) of an internal combustion engine (not shown). Furthermore, a thread 18 is provided with which the spark plug 1 with the combustion chamber housing 36 is permanently connected. The thread 18 is arranged on the wall 16, which surrounds the ground electrode 4 and the center electrode 2 so that the spark gap s is surrounded by this wall 16. From the wall 16, a web 24 extends to the center of the spark plug 1, where the actual ground electrode 4 is formed as a counter electrode to the center electrode 2. It can be seen that the spark gap s between ground electrode 4 and center electrode 2 is formed such that it extends along the longitudinal axis a of the spark plug 1.
  • an opening 20 is now provided, through which a distance gauge 32 can be inserted.
  • an opening 20 On both sides of the wall 16 is in each case an opening 20, which is also arranged so that the distance gauge is insertable from each side and optionally completely pushed through.
  • the distance to the center electrode can be reduced by the web 24 yielding slightly until the thickness of the distance gauge 32 is reached and the desired electrode spacing s is set.
  • the wall 16 is approximately circular in the region of the opening 20.
  • the opening 20 is arranged on the fastening area 25 of the web 24 opposite side. Based on the circumference of the wall 16, the width b of the opening 20 makes up about 6%.
  • the thickness that is, the longitudinal extent k along the longitudinal axis a of the spark plug 1, the opening is slightly thicker than the electrode spacing s, so that the distance gauge 32 is well insertable.
  • FIGS. 2a to 2d a known spark plug is described with a recess which substantially the embodiment of the FIGS. 1a to 1d equivalent. It can therefore in this respect to the description of the figures to the FIGS. 1a to 1d to get expelled.
  • Fig. 2a shows a side view
  • Fig. 2b an oblique view
  • Fig. 2c a view of the front
  • Fig. 2d a sectional view along the plane EE of Fig. 2a
  • a recess 22 instead of an opening 20 is provided.
  • the opening 20 also allows access of the distance gauge 32.
  • the width b of the recess 22 corresponds to the width b of the opening 20 of the FIGS. 1a to 1d
  • the longitudinal extent k ' is about three times the thickness of the electrode spacing s.
  • FIGS. 3a to 3d show a known spark plug 1 with a recess (22) and a cover (30) based on the FIGS. 1a to 1d , as well as 2a to 2d. It can also be made to the preceding description of the figures.
  • Fig. 3a shows a side view
  • Fig. 3b an oblique view
  • Fig. 3c a view on the front
  • Fig. 3d a sectional view along the plane EE of Fig. 3a
  • a cover 30 is provided which limits the spark plug 1 the front side, that is at the electrode end.
  • the actual wall 16 in this case has a recess 22 which extends to the end of the thread 18. This is followed by a hemispherical dome which forms the cover 30.
  • Studentsstömbohronne 34 are arranged, which form the fluid exchange between the enclosed space in the spark plug 1 and the actual combustion chamber.
  • the opening 20 or recess 22 is covered in the installed state by the wall of the combustion chamber housing, since the spark plug is installed over the entire threaded portion 18.
  • the combustion chamber housing is schematically indicated with 36 in this regard.
  • the spark plugs have a wall 16 which converges conically internally to the center of the spark plug 1.
  • the space between ground electrode 24 toward the insulator body 12 is therefore frusto-conical. In this way, even better heat can be removed from the two electrodes 2, 4.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Spark Plugs (AREA)

Claims (9)

  1. Bougie d'allumage (1) comportant une électrode centrale (2) et une électrode de masse (4), l'électrode centrale (2) étant disposée par rapport à l'électrode de masse (4) de telle sorte que la distance de décharge (s) s'étend entre l'électrode de masse (4) et l'électrode centrale (2), la distance de décharge (s) étant entourée par une paroi (16) qui, pour former une partie de fixation permettant de fixer la bougie d'allumage dans un carter de chambre de combustion (36) d'un moteur à combustion interne, porte au moins par zones un filetage extérieur (18), la paroi (16) comportant une ouverture (20) qui est disposée dans la zone du filetage extérieur (18) et qui est réalisée de telle sorte qu'une jauge d'écartement (32) peut être introduite à travers ladite ouverture (20) entre l'électrode centrale (2) et l'électrode de masse (4), caractérisée en ce que l'ouverture (20) est entourée de toutes parts par le filetage extérieur (18).
  2. Bougie d'allumage selon la revendication 1, caractérisée en ce que l'électrode de masse (4) est reliée à la paroi (16) par l'intermédiaire d'une barrette (24).
  3. Bougie d'allumage selon la revendication 2, caractérisée en ce que la barrette (24) s'étend sensiblement perpendiculairement à l'axe longitudinal (a) de la bougie d'allumage (1).
  4. Bougie d'allumage selon la revendication 3, caractérisée en ce que l'ouverture (20) est agencée dans la paroi (16) sur le côté situé en face du lieu de fixation (25) de la barrette (24) contre la paroi (16).
  5. Bougie d'allumage selon l'une quelconque des revendications 2 à 4, caractérisée en ce que la paroi (16), la barrette (24) et l'électrode de masse (4) sont réalisées d'un seul tenant.
  6. Bougie d'allumage selon l'une quelconque des revendications 1 à 5, caractérisée en ce que dans la zone de l'ouverture (20), la paroi (16) comporte une section transversale sensiblement circulaire, l'ouverture (20) s'étendant sur une zone (b) de 3 à 10 %, de préférence de 5 à 7 % le long du pourtour extérieur du cercle.
  7. Bougie d'allumage selon l'une quelconque des revendications 1 à 6, caractérisée en ce que la dimension longitudinale (k) de l'ouverture (20) le long de la distance de décharge (9) mesure entre la distance simple et la distance double entre l'électrode centrale (2) et l'électrode de masse (4).
  8. Bougie d'allumage selon l'une quelconque des revendications 1 à 7, caractérisée en ce que du côté frontal est prévu un couvercle (30), de préférence en forme de dôme, qui, dans la position montée, sépare l'électrode de masse (4) et l'électrode centrale (2) de la chambre de combustion du moteur à combustion interne, des orifices de passage étant prévus dans le couvercle (34).
  9. Procédé pour le réglage de la distance entre une électrode centrale (2) et une électrode de masse (4) d'une bougie d'allumage (1) selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'une jauge d'écartement (32), ayant une épaisseur correspondant à la distance souhaitée, est introduite par l'intermédiaire de l'ouverture (20), et l'électrode de masse (4) est poussée vers l'électrode centrale (2) jusqu'à ce que la distance entre l'électrode centrale (2) et l'électrode de masse (4) corresponde à l'épaisseur de la jauge d'écartement (32).
EP10798461.9A 2009-12-23 2010-12-03 Bougie d'allumage munie d'un trou pour le réglage Active EP2517323B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT20262009A AT509313B1 (de) 2009-12-23 2009-12-23 Zündkerze mit loch zum einstellen
PCT/AT2010/000465 WO2011075754A1 (fr) 2009-12-23 2010-12-03 Bougie d'allumage munie d'un trou pour le réglage

Publications (2)

Publication Number Publication Date
EP2517323A1 EP2517323A1 (fr) 2012-10-31
EP2517323B1 true EP2517323B1 (fr) 2015-02-18

Family

ID=43484909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10798461.9A Active EP2517323B1 (fr) 2009-12-23 2010-12-03 Bougie d'allumage munie d'un trou pour le réglage

Country Status (5)

Country Link
US (1) US8810117B2 (fr)
EP (1) EP2517323B1 (fr)
AT (1) AT509313B1 (fr)
ES (1) ES2536708T3 (fr)
WO (1) WO2011075754A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8350457B2 (en) 2011-03-31 2013-01-08 Denso International America, Inc. Pre-chamber spark plug including a gas thread cavity
DE102014111897B4 (de) * 2013-10-31 2020-06-25 Borgwarner Ludwigsburg Gmbh Zündeinrichtung zum Zünden von Brennstoff-Luft-Gemischen in einer Brennkammer eines Verbrennungsmotors durch eine Korona-Entladung
WO2016172767A1 (fr) * 2015-04-30 2016-11-03 LEESON, Darren Équipement d'essai de bougies d'allumage
CN105119146B (zh) * 2015-08-19 2017-07-25 张蝶儿 一种火花塞及其生产工艺
CN105119145B (zh) * 2015-08-19 2017-07-25 张蝶儿 一种火花塞及其生产工艺
DE102017107679B4 (de) 2017-04-10 2020-03-26 Federal-Mogul Ignition Gmbh Vorkammerzündkerze für eine Brennkraftmaschine
US10145292B1 (en) * 2017-08-24 2018-12-04 Caterpillar Inc. Spark plug
DE102017221517A1 (de) * 2017-11-30 2019-06-06 Robert Bosch Gmbh Zündkerze mit verlängertem Gehäuse und Masseelektrode an der Gehäuseinnenseite

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55101719A (en) * 1979-11-11 1980-08-04 Yariichi Hisada Internal combustion engine having subsidiary chamber
US5022881A (en) * 1985-07-19 1991-06-11 Cooper Industries, Inc. Method for making a spark plug with a predetermined spark gap
US6013973A (en) * 1997-10-24 2000-01-11 Sato; Jun Spark plug having a sub-combustion chamber for use in fuel ignition systems
AT413904B (de) * 2003-09-19 2006-07-15 Ge Jenbacher Ag Zündkerze
CN2796196Y (zh) * 2005-05-08 2006-07-12 张明杰 火花塞的改进结构
JP2008186667A (ja) * 2007-01-29 2008-08-14 Denso Corp 内燃機関用のスパークプラグ

Also Published As

Publication number Publication date
EP2517323A1 (fr) 2012-10-31
WO2011075754A1 (fr) 2011-06-30
US20120256531A1 (en) 2012-10-11
AT509313A1 (de) 2011-07-15
AT509313B1 (de) 2011-12-15
US8810117B2 (en) 2014-08-19
ES2536708T3 (es) 2015-05-27

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