EP2089944A1 - Bougie d'allumage, notamment pour des pressions élevées de la chambre de combustion - Google Patents

Bougie d'allumage, notamment pour des pressions élevées de la chambre de combustion

Info

Publication number
EP2089944A1
EP2089944A1 EP07787409A EP07787409A EP2089944A1 EP 2089944 A1 EP2089944 A1 EP 2089944A1 EP 07787409 A EP07787409 A EP 07787409A EP 07787409 A EP07787409 A EP 07787409A EP 2089944 A1 EP2089944 A1 EP 2089944A1
Authority
EP
European Patent Office
Prior art keywords
insulator
conductive
spark plug
sheet
housing
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.)
Granted
Application number
EP07787409A
Other languages
German (de)
English (en)
Other versions
EP2089944B1 (fr
Inventor
Thomas Kaiser
Paulo Ricardo
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2089944A1 publication Critical patent/EP2089944A1/fr
Application granted granted Critical
Publication of EP2089944B1 publication Critical patent/EP2089944B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
    • H01T13/36—Sparking plugs characterised by features of the electrodes or insulation characterised by the joint between insulation and body, e.g. using cement
    • 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
    • H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
    • H01T13/38—Selection of materials for insulation

Definitions

  • the present invention relates to a spark plug for internal combustion engines, which is designed in particular for use in combustion chambers with high pressure.
  • Spark plugs are known from the prior art in different configurations.
  • the known spark plugs have basically proven themselves for use in internal combustion engines.
  • the pressures in the combustion chamber at the time of ignition are getting larger, since the internal combustion engines are increasingly charged and operated with high compression.
  • it may lead to the formation of sliding sparks during ignition, which in particular also into a respiratory chamber of the spark plug, which is formed between a tapered region of the insulator and a housing of the spark plug at the combustion chamber end of the spark plug.
  • Such sliding sparks lead in the homogeneous operation of the internal combustion engine to a turbulent engine run. In stratified operation of the internal combustion engine and in operating states with inhomogeneous mixture distribution, such. During low-temperature starts, sliding sparks cause frequent misfires.
  • the spark plug according to the invention with the features of claim 1 has the advantage that it prevents the formation of sliding sparks. This allows the spark plug according to the invention in particular in internal combustion engines with high Press, such as charged and / or high-compression engines used.
  • the spark plug according to the invention has a long service life and can be produced easily and inexpensively. This is inventively achieved in that on the insulator of the spark plug, a conductive sheet-like element is arranged, which is in electrical contact with the housing. As a result, it is achieved according to the invention that the
  • Insulator surface is placed on the electrical potential of the housing.
  • the housing is usually grounded.
  • Partial discharges are avoided in the housing web area and thus also electromagnetic interference pulses are suppressed.
  • the conductive, sheet-like element is preferably formed as extending completely around the insulator band.
  • an emergence of electric fields in the critical region of the respiratory space between the insulation and the housing can be reliably prevented.
  • the conductive, sheet-like element is arranged in the region of a sealing seat between the housing and the insulator. As a result, a secure contact can be achieved.
  • the spark plug comprises a sealing ring, which is arranged between the housing and the insulator, and the sealing ring is made of an electrically conductive material.
  • the conductive, sheet-like element according to the invention is arranged on a region of the insulator which is positioned at the level of the sealing ring.
  • the conductive, sheet-like element has a maximum thickness of 100 microns.
  • the conductive sheet-like member is further preferably provided with a constant thickness. This upper limit of the thickness of the element has the advantage that a simple attachment is guaranteed. It should also be noted that as the layer thickness increases, stresses in the material significantly increase, thereby deteriorating the attachment of the element.
  • the thickness of the conductive, sheet-like element is in the range of about 50 microns to about 80 microns.
  • the conductive, sheet-like element is arranged on the insulator at a region of the insulator, which is arranged in the mounted state at the level of an inner, circumferential web of the housing.
  • the conductive, sheet-like element on the insulator covers at least 70% of the surface of the insulator, which is directed to the inner web of the housing in the radial direction of the spark plug.
  • the conductive sheet-like element starting from a contact point between the insulator and the housing, covers a region of the insulator in the direction of its end surface on which the electrodes are arranged, the area provided with the conductive, planar element being a maximum of 50%, preferably 30 % of the distance between the contact point and the end face of the insulator.
  • the conductive sheet-like member covers an area of at least 70% of a portion of the insulator having a pitch of less than or equal to 0.5mm from the inner surface of the housing. This also ensures that the critical area for the emergence of sliding sparks in the working space is made field-free.
  • the conductive, sheet-like element is a conductive coating.
  • the coating is a conductive ink, which has an electrical conductivity.
  • the conductive ink includes preferably a noble metal, in particular silver and / or platinum and / or gold and / or iridium and / or rhodium, and / or tantalum and / or nickel and / or carbon or any oxidation-resistant alloy thereof.
  • the oxidation resistance is important because high temperatures and atmospheric oxygen are present in the combustion chamber.
  • a thin tape e.g. Gold leaf or other precious metal-containing film can be used.
  • Figure 1 is a schematic, partially sectioned partial view of a spark plug according to an embodiment of the invention.
  • Figure 2 is a diagram showing the probability of the occurrence of sliding sparks in
  • the spark plug 1 comprises a housing 2 having an external thread 2a, with which the spark plug 1 is attached to a component of an internal combustion engine.
  • the spark plug 1 further includes an insulator 3 with a combustion chamber side end face 3 a.
  • a center electrode 4 is arranged, which is arranged in the longitudinal direction X-X of the spark plug.
  • a ground electrode 5 is connected to the housing 2.
  • a respiratory space 6 is formed between the insulator 3 and the housing 2.
  • the respiratory space 6 is annular and tapers from the electrode-side end of the spark plug.
  • the web 2b has an annular shape and a seal 9 is arranged at a step transition between the web 2b and the inside of the housing between the housing 2 and the insulator 3.
  • a coating 7 made of a silver conductive paint is further applied at the level of the web 2b.
  • the silver conductive ink can be applied to the insulator 3, for example, by spraying or rolling.
  • the contact point 8 is an electrically conductive contact between the housing 2 and the coating 7, so that it is achieved that the outer surface of the insulator is placed in the region of the respiratory space 6 to the electrical potential of the housing.
  • electric fields can be prevented from building up between the insulator 3 and the inside of the housing 2, which could lead to a sliding spark jumping over the end face 3a of the insulator 3 into the respiratory space 6 during the ignition time.
  • the conductive coating 7 eliminates these electric fields in the region of the inner web 2 b of the housing 2.
  • FIG. 2 shows a diagram which shows a comparison of a spark plug with an insulator without a coating according to the prior art and a spark plug according to the invention with an insulator having a coating of silver conductive paint.
  • the curve of the spark plug is marked with an insulator without coating with "N” and the curve of the spark plug with an insulator with coating marked with "M”.
  • "W” indicates the probability of a sliding spark in%.
  • the spark plug according to the invention has only a minimal probability of producing a sliding spark, even at very high pressures.
  • the coating 7 is provided on the insulator 3 at a width B in the longitudinal direction XX of the spark plug starting from the contact point 8, wherein a ratio of the width B to a distance A from the contact point 8 to the end face 3 a of the insulator 3 is about 1: 4.
  • the coating 7 is formed over a surface area starting from the contact point 8 of approximately 25% of the insulator surface from the contact point 8 to the end face 3 a.
  • the coating 7 is provided completely over the entire width of the web 2b.
  • An overlap of the coating 7 in the region of the web 2b should amount to at least 70% of the web width to the area prone to the unwanted pre-discharges between the insulator 3 and the housing 2 to make field-free. It should also be noted that the coating 7 on the insulator 3 should be at most 50%, particularly preferably at most 30%, of the distance A between the contact point 8 and the end face 3a.
  • the coating used is preferably a conductive paint which comprises a noble metal or an oxidation-resistant conductive alloy, since very high temperatures often occur in the combustion chamber.
  • the present invention can be used in all known fields of use of spark plugs, but is particularly preferably used when high pressures occur in combustion chambers.

Landscapes

  • Spark Plugs (AREA)

Abstract

La présente invention concerne une bougie d'allumage comprenant une électrode (4) centrale disposée à l'intérieur d'un isolateur (3) et un boîtier (2) qui entoure au moins partiellement l'isolateur (3), caractérisée en ce qu'un élément (7) conducteur plat qui est en contact électrique avec le boîtier (2) est disposé sur l'isolateur (3).
EP07787409A 2006-07-19 2007-07-12 Bougie d'allumage, notamment pour des pressions élevées de la chambre de combustion Expired - Fee Related EP2089944B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006033480A DE102006033480A1 (de) 2006-07-19 2006-07-19 Zündkerze, insbesondere für hohe Brennraumdrücke
PCT/EP2007/057138 WO2008009610A1 (fr) 2006-07-19 2007-07-12 Bougie d'allumage, notamment pour des pressions élevées de la chambre de combustion

Publications (2)

Publication Number Publication Date
EP2089944A1 true EP2089944A1 (fr) 2009-08-19
EP2089944B1 EP2089944B1 (fr) 2010-12-01

Family

ID=38445641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07787409A Expired - Fee Related EP2089944B1 (fr) 2006-07-19 2007-07-12 Bougie d'allumage, notamment pour des pressions élevées de la chambre de combustion

Country Status (9)

Country Link
US (1) US20100019643A1 (fr)
EP (1) EP2089944B1 (fr)
JP (1) JP2009544129A (fr)
CN (1) CN101490917A (fr)
BR (1) BRPI0713050A2 (fr)
DE (2) DE102006033480A1 (fr)
ES (1) ES2356019T3 (fr)
RU (1) RU2426208C2 (fr)
WO (1) WO2008009610A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8839753B2 (en) 2010-12-29 2014-09-23 Federal-Mogul Ignition Company Corona igniter having improved gap control
US11209181B2 (en) * 2016-07-27 2021-12-28 Johnson Controls Technology Company Heating, ventilating, and air conditioning system override systems and methods
EP3545187A4 (fr) * 2016-11-22 2020-07-22 Ic Llc Capteur d'ionisation de combustion de bougie d'allumage
JP2019110114A (ja) * 2017-12-19 2019-07-04 株式会社デンソー スパークプラグ用電極、及びスパークプラグ
JP6741717B2 (ja) * 2018-04-10 2020-08-19 日本特殊陶業株式会社 スパークプラグ

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734143A (en) * 1956-02-07 Sparking plugs for internal combustion
DE1289360B (de) * 1966-01-31 1969-02-13 Magneti Marelli Spa Zuendkerze fuer Brennkraftmaschinen und Verfahren zu ihrer Herstellung
US5182171A (en) * 1986-06-26 1993-01-26 Taiyo Steel Co., Ltd. Conductive and corrosion-resistant steel sheet
US5142228A (en) * 1989-04-24 1992-08-25 Corning Incorporated Method for statically or dynamically monitoring the thickness of electrically-conductive coatings on optical fibers
DE4039323A1 (de) * 1990-12-10 1992-06-11 Bosch Gmbh Robert Zuendvorrichtung und verfahren zum herstellen einer zuendvorrichtung
DE4240646A1 (de) * 1992-12-03 1994-06-09 Bosch Gmbh Robert Zündkerze für Brennkraftmaschinen
JPH11339925A (ja) * 1998-05-26 1999-12-10 Ngk Spark Plug Co Ltd スパークプラグ
DE10016414A1 (de) * 2000-04-01 2001-10-18 Bosch Gmbh Robert Glas und Glaspulvermischung sowie deren Verwendung zur Herstellung einer Glaskeramik
DE10047498A1 (de) * 2000-09-26 2002-04-18 Bosch Gmbh Robert Zündkerze kompakter Bauart und Herstellungsverfahren
JP2005116513A (ja) * 2003-09-16 2005-04-28 Denso Corp スパークプラグ
DE102004002906A1 (de) * 2004-01-20 2005-08-04 Beru Ag Zündkerze
DE102004003216B3 (de) * 2004-01-22 2005-08-25 Era Ag Zündspule für eine Brennkraftmaschine
FR2881281B1 (fr) * 2005-01-26 2011-04-22 Renault Sas Bougie a generation de plasma
US20070188064A1 (en) * 2006-02-13 2007-08-16 Federal-Mogul World Wide, Inc. Metallic insulator coating for high capacity spark plug

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008009610A1 *

Also Published As

Publication number Publication date
BRPI0713050A2 (pt) 2012-04-17
JP2009544129A (ja) 2009-12-10
DE502007005876D1 (de) 2011-01-13
WO2008009610A1 (fr) 2008-01-24
RU2009105396A (ru) 2010-08-27
RU2426208C2 (ru) 2011-08-10
ES2356019T3 (es) 2011-04-04
DE102006033480A1 (de) 2008-01-24
US20100019643A1 (en) 2010-01-28
CN101490917A (zh) 2009-07-22
EP2089944B1 (fr) 2010-12-01

Similar Documents

Publication Publication Date Title
EP2815472B1 (fr) Bougie pour chambre de turbulence
EP0859436B1 (fr) Bougie d'allumage pour moteur à combustion interne
EP3811474B1 (fr) Bougie d'allumage de chambre de précombustion munie d'électrodes de masse disposées symétriquement sur le côté intérieur de boîtier
EP0049372B1 (fr) Bougie pour moteurs à combustion interne
EP3493340A1 (fr) Bougie d'allumage pourvue de logement allongé et d'électrode de masse sur la face intérieure du logement
EP2089944B1 (fr) Bougie d'allumage, notamment pour des pressions élevées de la chambre de combustion
DE102005060166B4 (de) Zündkerze
DE102007050634A1 (de) Zündkerze
EP1305858A1 (fr) Bougie d'allumage d'un moteur a combustion interne et procede de production d'une bougie d'allumage
DE102016200430A1 (de) Zündkerze mit einer Kerbe oder einer Nut im Isolator oder im Gehäuse
DE102013226667B4 (de) Zündkerze mit Dichtung aus einem nichtleitenden Material
DE102015102745A1 (de) Zündkerze für einen Vorkammer-Verbrennungsmotor
DE102018113348A1 (de) Zündkerze
EP1881573A2 (fr) Dispositif d'allumage, en particulier bougie d'allumage pour moteur à combustion et procédé de positionnement d'au moins une électrode de masse dans le dispositif d'allumage
DE102017111898A1 (de) Zündkerze
DE102004032723B4 (de) Zündkerze
DE10339759B4 (de) Zündkerze
EP1295067A1 (fr) Bougie crayon de prechauffage
EP2761710B1 (fr) Bougie d'allumage améliorée
DE19745165A1 (de) Zündkerze mit beschichteter Kerzenisolatorbohrung
EP3939133A1 (fr) Culot de bougie à protection anticorrosion sur la face intérieure ainsi que bougie et procédé de fabrication
DE112021004424T5 (de) Zündkerze
DE112020000095T5 (de) Zündkerze
DE102014109532B4 (de) Koronazündeinrichtung
DE102005046431A1 (de) Zündkerze mit einem einen Isolator umgebenden Gehäuse

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: 20090609

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 MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

RBV Designated contracting states (corrected)

Designated state(s): DE ES FR GB IT

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

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): DE ES FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 502007005876

Country of ref document: DE

Date of ref document: 20110113

Kind code of ref document: P

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2356019

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20110404

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

26N No opposition filed

Effective date: 20110902

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502007005876

Country of ref document: DE

Effective date: 20110902

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

Ref country code: ES

Payment date: 20140721

Year of fee payment: 8

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

Ref country code: IT

Payment date: 20140724

Year of fee payment: 8

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: 20150712

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: ES

Ref legal event code: FD2A

Effective date: 20161205

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: 20150713

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

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: 20170720

Year of fee payment: 11

Ref country code: GB

Payment date: 20170724

Year of fee payment: 11

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

Ref country code: DE

Payment date: 20170927

Year of fee payment: 11

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502007005876

Country of ref document: DE

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

Effective date: 20180712

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: 20180731

Ref country code: GB

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

Effective date: 20180712

Ref country code: DE

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

Effective date: 20190201