EP0995245A1 - Spark plug for an internal combustion engine - Google Patents

Spark plug for an internal combustion engine

Info

Publication number
EP0995245A1
EP0995245A1 EP99911598A EP99911598A EP0995245A1 EP 0995245 A1 EP0995245 A1 EP 0995245A1 EP 99911598 A EP99911598 A EP 99911598A EP 99911598 A EP99911598 A EP 99911598A EP 0995245 A1 EP0995245 A1 EP 0995245A1
Authority
EP
European Patent Office
Prior art keywords
spark plug
combustion chamber
inner conductor
current
conductor arrangement
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
EP99911598A
Other languages
German (de)
French (fr)
Other versions
EP0995245B1 (en
Inventor
Rudolf Pollner
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 EP0995245A1 publication Critical patent/EP0995245A1/en
Application granted granted Critical
Publication of EP0995245B1 publication Critical patent/EP0995245B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • H01T13/40—Sparking plugs structurally combined with other devices
    • H01T13/41—Sparking plugs structurally combined with other devices with interference suppressing or shielding means

Definitions

  • the invention is based on a spark plug as it is already known from DE 196 23 989 AI. Here is one
  • Proposed spark plug which has a tubular metallic housing in which an insulator is embedded, in which a rod-shaped inner conductor arrangement is arranged, the inner conductor arrangement consisting of a connecting bolt, a current-limiting resistor, a coated
  • the spark plug according to the invention has the advantage over the known spark plugs that, due to the advanced resistance melting, a reduction of
  • the resistance package in the resistance melting the connection side facing away from the combustion chamber has a larger cross section than the resistance package on the side facing the combustion chamber. This has the advantage that despite the spatial limitation and the use of a relatively small resistance package in the area of the electrodes, there is a high degree of stability with regard to the capacitive loads.
  • the figure shows the combustion chamber end of the spark plug according to the invention with a resistor package.
  • the figure shows schematically the section of a spark plug on the combustion chamber side in a sectional illustration.
  • an insulator 11 is arranged in a metallic tubular housing 10, the rotationally symmetrical axes of the housing 10 and the insulator 11 being congruent.
  • the insulator 11 there is also a contact pin 12,
  • Burn-off resistor 13 which is embedded in a conductive contact panate 14, a contact pin 15 and the center electrode 16 are arranged.
  • the bore of the insulator 11, which receives the entire conductive center arrangement is designed in such a way that that the insulator bore 17 areas of different diameters on. These different diameters are designed such that the diameter of the insulator bore 17 is greatest in the region of the contact bolt, while the diameter of the insulator bore is smallest on the combustion chamber side.
  • the resistance package 13 thus also has a larger cross section on the side of the contact bolt 12 than on the electrode side.
  • the foot hole is made with a diameter of about 3 mm, while the
  • Hole on the side of the contact pin has a diameter of approximately 4.6 mm.
  • the conductive contact panate in which the erosion resistor 13 is fused must have a smaller diameter in the front region.
  • the smaller diameter increases the energy density in the resistance package.
  • the resistance package 13 has a larger diameter in the area facing away from the combustion chamber.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Spark Plugs (AREA)

Abstract

Disclosed is a spark plug having a cylindrical metallic shell and an insulator embedded therein, in which a rod-shaped inner conductor arrangement is mounted. The inner conductor arrangement consists of a contact bolt, a current-limiting resistor embedded in an electrically conductive contact material, a contact pin and a middle electrode. The current-limiting resistor has two areas with different diameters. The area on the combustion chamber side has a smaller diameter than the area distant from the combustion chamber.

Description

Zündkerze für eine BrennkraftmaschineSpark plug for an internal combustion engine
Stand der TechnikState of the art
Die Erfindung geht aus von einer Zündkerze wie sie bereits aus der DE 196 23 989 AI bekannt ist. Hier wird eineThe invention is based on a spark plug as it is already known from DE 196 23 989 AI. Here is one
Zündkerze vorgeschlagen, die ein rohrförmiges metallisches Gehäuse aufweist, in welchem ein Isolator eingebettet ist, in dem eine stabförmige Innenleiteranordnung angeordnet ist, wobei die Innenleiteranordnung aus einem Anschlußbolzen, einem strombegrenzenden Widerstand, einem beschichtetemProposed spark plug, which has a tubular metallic housing in which an insulator is embedded, in which a rod-shaped inner conductor arrangement is arranged, the inner conductor arrangement consisting of a connecting bolt, a current-limiting resistor, a coated
Kontaktstift und einer nageiförmigen Platinmittelelektrode besteht. Ferner sind am Gehäuse mindestens zwei vorzugsweise 4 Masselektroden befestigt, die zur Mittelektrode hin abgebogen sind.Contact pin and a nail-shaped platinum center electrode. Furthermore, at least two, preferably 4, ground electrodes are attached to the housing and are bent toward the center electrode.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Zündkerze hat gegenüber den bekannten Zündkerzen den Vorteil, daß durch die vorgezogene Widerstandseinschmelzung eine Verringerung vonThe spark plug according to the invention has the advantage over the known spark plugs that, due to the advanced resistance melting, a reduction of
Funkeneingrabungen in die Keramik und damit eine ausreichende Dauerstabilität und Lebensdauer der Zündkerze bei hohen Funkenergien und positiver Polarität der Zündspannung gegeben ist. Erfindungswesentlich ist hierbei, daß das Widerstandspaket in der Widerstandseinschmelzung auf der dem Brennraum abgewandten Anschlußseite einen größeren Querschnitt als das Widerstandspaket auf der dem Brennraum zugewandten Seite aufweist. Dies hat zum Vorteil, daß trotz der räumlichen Begrenzung und der Verwendung eines relativ kleinen Widerstandspaketes im Bereich der Elektroden eine hohe Stabilität gegenüber den kapazitiven Beanspruchungen gegeben ist.Spark digging into the ceramic and thus sufficient long-term stability and service life of the spark plug with high spark energies and positive polarity of the ignition voltage is given. It is essential to the invention that the resistance package in the resistance melting the connection side facing away from the combustion chamber has a larger cross section than the resistance package on the side facing the combustion chamber. This has the advantage that despite the spatial limitation and the use of a relatively small resistance package in the area of the electrodes, there is a high degree of stability with regard to the capacitive loads.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der einzigen Figur dargestellt und in der nachfolgenden Beschreibung näher erläutert .An embodiment of the invention is shown in the single figure and explained in more detail in the following description.
Die Figur zeigt das brennraumseitige Ende der erfindungsgemäßen Zündkerze mit Widerstandspaket.The figure shows the combustion chamber end of the spark plug according to the invention with a resistor package.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Der prinzipielle Aufbau einer Zündkerze ist bereits aus der eingangs erwähnten DE 196 23 989 AI oder beispielsweise aus der DE-OS 44 31 143 hinreichend bekannt, so daß dieser hier nicht nochmals erläutert werden soll.The basic structure of a spark plug is already sufficiently known from the aforementioned DE 196 23 989 AI or, for example, from DE-OS 44 31 143, so that this will not be explained again here.
Die Figur zeigt schematisch den brennraumseitigen Abschnitt einer Zündkerze in geschnittener Darstellung. Hierbei ist in einem metallischen rohrförmigen Gehäuse 10 ein Isolator 11 angeordnet, wobei die rotationssymmetrischen Achsen des Gehäuses 10 und des Isolators 11 deckungsgleich liegen. In dem Isolator 11 ist ferner ein Kontaktbolzen 12, einThe figure shows schematically the section of a spark plug on the combustion chamber side in a sectional illustration. Here, an insulator 11 is arranged in a metallic tubular housing 10, the rotationally symmetrical axes of the housing 10 and the insulator 11 being congruent. In the insulator 11 there is also a contact pin 12,
Abbrandwiderstand 13, welcher in ein leitfähiges Kontaktpanat 14 eingebettet ist, ein Kontaktstift 15 und die Mittelelektrode 16 angeordnet . Bei dieser erfindungsgemäßen Ausführung ist die Bohrung des Isolators 11, welche die gesamte leitfähige Mittelanordnung aufnimmt, so gestaltet, daß die Isolatorbohrung 17 Bereiche unterschiedlicher Durchmesser auf eist. Diese verschiedenen Durchmesser sind so gestaltet, daß im Bereich des Kontaktbolzens der Durchmesser der Isolatorbohrung 17 am größten ist, während der Durchmesser der Isolatorbohrung auf der Brennraumseite am kleinsten ist. Damit weist auch das Widerstandspaket 13 auf der Seite des Kontaktbolzens 12 einen größeren Querschnitt auf als auf der Elektrodenseite. Im dargestellten Ausführungsbeispiel ist die Fußbohrung mit einem Durchmesser von ca. 3 mm ausgeführt, während dieBurn-off resistor 13, which is embedded in a conductive contact panate 14, a contact pin 15 and the center electrode 16 are arranged. In this embodiment according to the invention, the bore of the insulator 11, which receives the entire conductive center arrangement, is designed in such a way that that the insulator bore 17 areas of different diameters on. These different diameters are designed such that the diameter of the insulator bore 17 is greatest in the region of the contact bolt, while the diameter of the insulator bore is smallest on the combustion chamber side. The resistance package 13 thus also has a larger cross section on the side of the contact bolt 12 than on the electrode side. In the illustrated embodiment, the foot hole is made with a diameter of about 3 mm, while the
Bohrung auf der Seite des Kontaktbolzens einen Durchmesser von ca. 4,6 mm aufweist. Bei dieser Anordnung liegt das Ende des Widerstandspaketes mit dem größeren Querschnitt bereits außerhalb des Fußbereiches der Zündkerze, so daß es keine Probleme durch unzureichende Keramikwandstärken gibt .Hole on the side of the contact pin has a diameter of approximately 4.6 mm. With this arrangement, the end of the resistor package with the larger cross section is already outside the foot region of the spark plug, so that there are no problems due to insufficient ceramic wall thicknesses.
Wegen der räumlichen Verhältnisse im Fußbereich der Zündkerze, welches das elektrodenseitige Ende der Zündkerze darstellt, muß das leitfähige Kontaktpanat, in welchem der Abbrandwiderstand 13 eingeschmolzen ist, im vorderen Bereich einen kleineren Durchmesser aufweisen. Durch den kleineren Durchmesser erhöht sich die Energiedichte im Widerstandspaket. Um dieser erhöhten Energiedichte zu begegnen, weist das Widerstandspaket 13 im brennraumabgewandten Bereich einen größeren Durchmesser auf. Because of the spatial conditions in the foot region of the spark plug, which represents the end of the spark plug on the electrode side, the conductive contact panate in which the erosion resistor 13 is fused must have a smaller diameter in the front region. The smaller diameter increases the energy density in the resistance package. In order to counter this increased energy density, the resistance package 13 has a larger diameter in the area facing away from the combustion chamber.

Claims

Ansprüche Expectations
1. Zündkerze mit einem rohrförmigen metallischen Gehäuse, mit einem darin eingebetteten Isolator, in welchem eine stabförmige Innenleiteranordnung angeordnet ist, wobei die Innnenleiteranordnung aus einem Kontaktbolzen, einem in ein leitfähiges Kontaktpanat eingebetteten strombegrenzenden Widerstand (13) , einem Kontaktstift (15) , und einer1. Spark plug with a tubular metallic housing, with an insulator embedded therein, in which a rod-shaped inner conductor arrangement is arranged, the inner conductor arrangement comprising a contact pin, a current-limiting resistor (13) embedded in a conductive contact panate, a contact pin (15), and one
Mittelelektrode (16) besteht, dadurch gekennzeichnet, daß der strombegrenzende Widerstand mindestens zwei Bereiche unterschiedlichen Querschnittes aufweist, wobei der Querschnitt im brennraumzugewandten Bereich kleiner ist als der Querschnitt im brennraumabgewandten Bereich des Widerstandes .Center electrode (16), characterized in that the current-limiting resistor has at least two regions of different cross section, the cross section in the region facing the combustion chamber being smaller than the cross section in the region of the resistor facing away from the combustion chamber.
2. Zündkerze nach Anspruch 1, dadurch gekennzeichnet, daß der brennraumabgewandte Bereich des Widerstandspaketes außerhalb des Fußbereiches der Zündkerze liegt. 2. Spark plug according to claim 1, characterized in that the area of the resistor package facing away from the combustion chamber lies outside the foot area of the spark plug.
EP99911598A 1998-04-24 1999-02-12 Spark plug for an internal combustion engine Expired - Lifetime EP0995245B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19818214 1998-04-24
DE19818214A DE19818214A1 (en) 1998-04-24 1998-04-24 Spark plug for combustion engine
PCT/DE1999/000396 WO1999056363A1 (en) 1998-04-24 1999-02-12 Spark plug for an internal combustion engine

Publications (2)

Publication Number Publication Date
EP0995245A1 true EP0995245A1 (en) 2000-04-26
EP0995245B1 EP0995245B1 (en) 2001-06-27

Family

ID=7865596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99911598A Expired - Lifetime EP0995245B1 (en) 1998-04-24 1999-02-12 Spark plug for an internal combustion engine

Country Status (6)

Country Link
US (1) US6380664B1 (en)
EP (1) EP0995245B1 (en)
JP (1) JP2002509638A (en)
BR (1) BR9906395A (en)
DE (2) DE19818214A1 (en)
WO (1) WO1999056363A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7443089B2 (en) 2006-06-16 2008-10-28 Federal Mogul World Wide, Inc. Spark plug with tapered fired-in suppressor seal

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19833316A1 (en) * 1998-07-24 2000-01-27 Bosch Gmbh Robert Spark plug for use in internal combustion engines has a center electrode coupled to a temperature resistant wound resistor
DE10339759B4 (en) * 2003-08-27 2018-08-16 Robert Bosch Gmbh spark plug
US7015698B2 (en) * 2004-02-10 2006-03-21 General Electric Company Sensor for detection of spark in igniter in gas turbine engine
US7242195B2 (en) * 2004-02-10 2007-07-10 General Electric Company Integral spark detector in fitting which supports igniter in gas turbine engine
US7188466B2 (en) * 2004-02-10 2007-03-13 General Electric Company Passive, high-temperature amplifier for amplifying spark signals detected in igniter in gas turbine engine
US7093422B2 (en) * 2004-02-10 2006-08-22 General Electric Company Detecting spark in igniter of gas turbine engine by detecting signals in grounded RF shielding
US7093421B2 (en) * 2004-02-10 2006-08-22 General Electric Company Spark igniter for gas turbine engine
US7375531B2 (en) * 2004-02-10 2008-05-20 General Electric Company Method of informing pilot of aircraft of spark detected in gas turbine engine
CN101743671B (en) 2007-05-17 2012-12-12 费德罗-莫格尔点火公司 Small-diameter spark plug with resistive seal
JP6422841B2 (en) 2015-10-20 2018-11-14 日本特殊陶業株式会社 Spark plug
JP7085708B2 (en) 2016-06-20 2022-06-17 エフ－スター セラピューティクス リミテッド LAG-3 binding element
KR20190019144A (en) 2016-06-20 2019-02-26 에프-스타 델타 리미티드 Binding molecules that bind to PD-L1 and LAG-3
JP6373313B2 (en) * 2016-08-11 2018-08-15 日本特殊陶業株式会社 Spark plug
EP3728316A1 (en) 2017-12-19 2020-10-28 F-Star Beta Limited Fc binding fragments comprising a pd-l1 antigen-binding site

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5095242A (en) * 1990-07-24 1992-03-10 North American Philips Corporation Low radio interference spark plug
JP3383920B2 (en) * 1991-11-30 2003-03-10 日本特殊陶業株式会社 Spark plug for internal combustion engine
DE4431143B4 (en) 1994-09-01 2004-09-23 Robert Bosch Gmbh Spark plug for an internal combustion engine
DE19623989C2 (en) * 1996-06-15 1998-07-30 Bosch Gmbh Robert Spark plug for an internal combustion engine
DE19636537B4 (en) 1996-09-09 2006-11-30 Robert Bosch Gmbh Spark plug for internal combustion engines
JP3819586B2 (en) * 1997-04-23 2006-09-13 日本特殊陶業株式会社 Spark plug with resistor, resistor composition for spark plug, and method of manufacturing spark plug with resistor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9956363A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7443089B2 (en) 2006-06-16 2008-10-28 Federal Mogul World Wide, Inc. Spark plug with tapered fired-in suppressor seal

Also Published As

Publication number Publication date
EP0995245B1 (en) 2001-06-27
JP2002509638A (en) 2002-03-26
BR9906395A (en) 2000-09-26
DE59900137D1 (en) 2001-08-02
US6380664B1 (en) 2002-04-30
DE19818214A1 (en) 1999-10-28
WO1999056363A1 (en) 1999-11-04

Similar Documents

Publication Publication Date Title
DE69622818T2 (en) Spark plug for use in an internal combustion engine
EP0995245A1 (en) Spark plug for an internal combustion engine
DE60101755T2 (en) Spark plug for internal combustion engines
EP2815472B1 (en) Spark plug, particularly for swirl chamber
DE102005036971B4 (en) Spark plug with high ignition capability
DE19623989C2 (en) Spark plug for an internal combustion engine
DE3851617T2 (en) Spark plug.
DE112020006495T5 (en) spark plug
DE19743544A1 (en) Ignition device for an internal combustion engine
DE102005024666B4 (en) Spark plug with several earth electrodes
DE102007050634A1 (en) spark plug
DE4429272B4 (en) Spark plug for an internal combustion engine
DE19636537B4 (en) Spark plug for internal combustion engines
DE69820452T2 (en) SPARK PLUG
WO1998026481A1 (en) Spark plug
DE102006000152B4 (en) Spark plug with low discharge voltage and strong self-cleaning ability
EP1045137B1 (en) Ignition device for piston combustion engines
DE10327596A1 (en) Spark plug for vehicle engine comprises hollow housing, an insulator fitting in the housing, central electrode fitting in the insulator and having front end section protruding over end section of the insulator and earth electrode
EP0591686B1 (en) Connecting element for ignition device
DE60037955T2 (en) Spark plug for internal combustion engines
DE2734475A1 (en) SPARK PLUG
DE10156949B4 (en) spark plug
DE60224690T2 (en) SPARK PLUG
DE10339759B4 (en) spark plug
DE10329269A1 (en) Ignition plug for internal combustion engine ignition with at least one central electrode has second longitudinal bore in insulator in which second central conductor with electrode is arranged

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 20000504

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20000718

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 59900137

Country of ref document: DE

Date of ref document: 20010802

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN P. & C. S.N.C.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20010910

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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
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: 20050212

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

Ref country code: FR

Payment date: 20060215

Year of fee payment: 8

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

Effective date: 20070212

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20071030

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

Ref country code: GB

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

Effective date: 20070212

Ref country code: FR

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

Effective date: 20070228

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

Ref country code: GB

Payment date: 20060221

Year of fee payment: 8

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

Ref country code: DE

Payment date: 20180426

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59900137

Country of ref document: DE