EP3281264A1 - Bougie d'allumage - Google Patents

Bougie d'allumage

Info

Publication number
EP3281264A1
EP3281264A1 EP17713154.7A EP17713154A EP3281264A1 EP 3281264 A1 EP3281264 A1 EP 3281264A1 EP 17713154 A EP17713154 A EP 17713154A EP 3281264 A1 EP3281264 A1 EP 3281264A1
Authority
EP
European Patent Office
Prior art keywords
spark plug
plug according
supply line
ignition
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.)
Granted
Application number
EP17713154.7A
Other languages
German (de)
English (en)
Other versions
EP3281264B1 (fr
Inventor
Georg Maul
Steffen Kuhnert
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.)
DKT Verwaltungs GmbH
Original Assignee
DKT Verwaltungs 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 DKT Verwaltungs GmbH filed Critical DKT Verwaltungs GmbH
Publication of EP3281264A1 publication Critical patent/EP3281264A1/fr
Application granted granted Critical
Publication of EP3281264B1 publication Critical patent/EP3281264B1/fr
Active 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
    • H01T13/02—Details
    • H01T13/16—Means for dissipating heat
    • 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
    • H01T13/02—Details
    • H01T13/04—Means providing electrical connection to sparking plugs
    • H01T13/05—Means providing electrical connection to sparking plugs combined with interference suppressing or shielding means
    • 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
    • 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
    • H01T13/34—Sparking plugs characterised by features of the electrodes or insulation characterised by the mounting of electrodes in insulation, e.g. by embedding
    • 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
    • H01T13/39—Selection of materials for electrodes
    • 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
    • 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
    • H01T13/46—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
    • H01T13/54—Sparking plugs having electrodes arranged in a partly-enclosed ignition chamber

Definitions

  • the present invention relates to a spark plug, in particular pre-chamber spark plug, with a housing, an ignition electrode and a ground electrode, wherein a supply line for supplying the ignition electrode is arranged with electrical voltage and wherein the supply line has a front electrode facing the ignition electrode and an ignition coil facing rear region , Spark plugs of the type in question are known for years from practice. These serve in an internal combustion engine of the ignition of the compressed fuel-air mixture in the combustion chamber of the cylinder. In the process, a high-voltage spark ignites the compressed fuel-air mixture at the spark plug.
  • EP 1 961 090 A1 describes a spark plug comprising an ignition electrode and a ground electrode.
  • the spark plug has an elongate tubular housing in which a supply line for supplying the ignition electrode with electrical voltage.
  • the supply line comprises a rear area facing the ignition coil and a front area facing the ignition electrode.
  • the front area is formed by a glass body, in which copper and carbon particles are embedded, so that a defined resistance results, which acts as a suppression resistor.
  • the suppression resistor serves to suppress the high-frequency interference pulses generated by the sparks, in order to comply with the limit values specified for the electromagnetic compatibility (EMC).
  • EMC electromagnetic compatibility
  • the suppression resistor heats up due to the flowing current. This causes the electrical resistance of the interference suppression resistor to change, namely due to the increased temperature. Furthermore, the suppression resistor heats the spark plug altogether, which negatively affects the ignition and thus affects the life of the spark plug and the function of the engine.
  • the present invention is therefore the object of a spark plug of the type mentioned in such a way and further, that with structurally simple means a reliable suppression while avoiding excessive heating is ensured.
  • the spark plug in question is characterized in that only the rear portion of the supply line has a sufficiently high electrical resistance to act as interference suppression.
  • a suppression resistor does not necessarily have to be provided in the front region of the supply line.
  • interference suppression can be realized in a surprisingly simple manner in that only the rear region of the supply line has a sufficiently high electrical resistance and thus acts as a suppression resistor. Due to the lack of interference suppression in the front region of the supply line, the heat development is extremely low, so that the ignition properties improve significantly.
  • the construction according to the invention has a positive effect on the service life of the spark plug.
  • suppression resistor is to be understood in the broadest sense, namely remote interference - the reduction of the interference field strength for the protection of radio and television reception - and / or a Nahentpara - for example, the reduction of the interference field strength to avoid interference Alternator - can include.
  • the second region of the supply line can have an electrical resistance of 3 k ⁇ / m to 10 k ⁇ / m, in particular 4 k ⁇ / m to 8 k ⁇ / m.
  • an electrical resistance of 5 kQ / m to 6 kQ / m has proven to be particularly advantageous for the realization of a suppression resistor.
  • the second area of the supply line can be realized by an ignition cable.
  • It may be a commercially available ignition cable, which has a correspondingly high electrical resistance, so that it acts as a suppression resistor.
  • the spark plug is particularly simple and inexpensive to manufacture.
  • it may be a reactance ignition lead having a silicone sheath surrounding a textile braid.
  • Within the textile braid may be provided a silicone insulation surrounding a stainless steel resistance wire which provides for optimum high voltage transmission while maintaining resistance values.
  • Within the stainless steel resistance wire may be arranged a ferromagnetic silicone for realizing the Entstörvier which is held by a carrier.
  • the front region of the supply line can have an electrical conductor.
  • the electrical conductor may be, for example, a wire.
  • the electrical conductor can be surrounded at least in regions by a seal.
  • the seal may be a molten glass.
  • the electrical conductor may have a diameter of less than one millimeter, preferably less than 0.7 mm.
  • the electrical conductor may have a diameter of 0.1 mm to 0.2 mm.
  • To realize the lowest possible electrical resistance of the electrical conductor can be made of nickel or a nickel alloy.
  • the front region has an electrode pin, which at one end with a Zündelektrodenexcellent and at the other end connected to the electrical conductor.
  • This arrangement ensures a highly effective loading of the ignition electrode with the required supply voltage.
  • To further improve the electrical conductivity of the electrode pin may have a copper core.
  • an insulator may be formed which at least partially encloses the front region.
  • the insulator may preferably consist of a ceramic, for example aluminum oxide, aluminum nitride or a composite comprising aluminum nitride or aluminum oxide.
  • a housing extension for example made of steel, can connect to the housing of the spark plug.
  • the housing extension may in particular be tubular and / or fixed to the housing via a welded connection.
  • an electrically insulating material can be arranged between the housing extension and the supply line, in particular with a dielectric strength of more than 5 kV / m.
  • the electrically insulating material may be for example a gel, in particular a silicone gel. Preferably, this may be a pourable two-component mixture.
  • FIG. 1 in a schematic, sectional view a
  • Embodiment of a spark plug according to the invention shows a schematic, sectioned view of an enlarged section of the embodiment according to FIG.
  • the spark plug comprises a cap 2 serving as a ground electrode 1. Within the prechamber 3 formed by the cap 2, an ignition electrode 4 is arranged. Furthermore, a housing 5 adjoins the cap 2, namely, is connected to the cap 2 via a weld seam 6. On the housing 5, a thread 7 and a seal 8 are formed so that the spark plug is securely connected to the ignition space and this completes. Alternatively or additionally, it is conceivable that a portion of the housing 5 is conical, so that the spark plug is connectable via a clamp with the ignition space.
  • the ignition electrode 4 is realized in the embodiment shown here in the form of two strips, each with arcuately curved ends.
  • the strips each have two ends which act as a firing surface. It is conceivable that the strips consist of an iridium alloy or a platinum alloy.
  • a supply line 9 which has a front portion 10 and a rear portion 1 1.
  • the front region 10 is formed by an electrode pin 12 and an electrical conductor 13.
  • the electrical conductor 13 can be realized as a wire, in particular made of nickel or of a nickel alloy.
  • the electrical conductor 13 is connected to the electrode pin 12, which is in contact with an ignition electrode carrier 14.
  • a seal 15 is formed around a portion of the electrical conductor 13 and the electrode pin 12.
  • the seal 15 may be realized for example as glass melt.
  • the front portion 10 is surrounded by an insulator 16, which may be made of a ceramic, for example Alumina or aluminum nitride. By the construction of the front portion 10, this has an extremely low electrical resistance.
  • an ignition cable 17 connects, which forms the rear portion 1 1 and thus is an integral or integral part of the spark plug.
  • a connecting means 18 is provided to ensure a secure mechanical and electrical connection with the ignition coil or the ignition system. Due to the small diameter of the electrical conductor 13, the capacitance of the section between the ignition cable 17 and the ignition electrode 4 is extremely low.
  • the ignition cable 17 has an electrical resistance which is sufficient to act as a suppression resistor. Thus, the Entstörwiderstand is exclusively realized by the rear portion 1 1, namely the ignition cable 17. As a result, the heat development of the spark plug is optimized with remarkably simple means and a reliable suppression is guaranteed.
  • a housing extension 19 is arranged on the housing 5, a housing extension 19 is arranged.
  • the housing extension 19 is tubular and connected via a weld 20 to the housing.
  • the housing extension 19 includes at least a portion of the front portion 10 and the rear portion 11.
  • an electrically insulating material 21 for example, a silicone gel arranged between the front portion 10 and the rear portion 1 1 and the housing extension 19 is an electrically insulating material 21, for example, a silicone gel arranged.
  • the insulating material 21 can have a dielectric strength of more than 5 kV / mm in a particularly advantageous manner.
  • FIG. 1 further shows an engagement point 22 for a handling means. This may be, for example, a hexagon, so that the spark plug with a corresponding key in the ignition space can be screwed.

Landscapes

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

Abstract

La présente invention concerne une bougie d'allumage, notamment une bougie d'allumage de chambre de précombustion, comprenant un boîtier (5), une électrode d'allumage (4) et une électrode de masse (1), une ligne d'alimentation (9) servant à appliquer une tension électrique à l'électrode d'allumage (4), et la ligne d'alimentation (9) présentant une zone avant (10) orientée vers l'électrode d'allumage (4) et une zone arrière (11) orientée vers une bobine d'allumage. La bougie d'allumage est caractérisée en ce que seule la zone arrière (11) de la ligne d'alimentation (9) présente une résistance électrique suffisamment élevée pour agir en tant que résistance antiparasite.
EP17713154.7A 2016-04-25 2017-01-23 Bougie d'allumage Active EP3281264B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016206993.4A DE102016206993A1 (de) 2016-04-25 2016-04-25 Zündkerze
PCT/DE2017/200005 WO2017186239A1 (fr) 2016-04-25 2017-01-23 Bougie d'allumage

Publications (2)

Publication Number Publication Date
EP3281264A1 true EP3281264A1 (fr) 2018-02-14
EP3281264B1 EP3281264B1 (fr) 2022-04-27

Family

ID=58410061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17713154.7A Active EP3281264B1 (fr) 2016-04-25 2017-01-23 Bougie d'allumage

Country Status (3)

Country Link
EP (1) EP3281264B1 (fr)
DE (1) DE102016206993A1 (fr)
WO (1) WO2017186239A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018217335A1 (de) * 2018-10-10 2020-04-16 Robert Bosch Gmbh Verfahren zum Betreiben eines Verbrennungsmotors, Steuergerät zur Durchführung des Verfahrens
JP6910496B1 (ja) 2020-04-06 2021-07-28 日本特殊陶業株式会社 スパークプラグ
DE102021203101A1 (de) * 2021-03-29 2022-09-29 Dkt Verwaltungs-Gmbh Zündkerze und ein Verfahren zur Herstellung einer Zündkerze

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE862977C (de) * 1942-03-13 1953-01-15 Bosch Gmbh Robert Einrichtung zur Unterdrueckung der von Funkenstrecken in Zuend- und Lichtanlagen in Kraftfahrzeugen und Flugzeugen ausgehenden Stoerwellen
DE1016500B (de) * 1956-08-11 1957-09-26 Auto Union Gmbh Leitungsanschluss an abgeschirmten Zuendkerzen fuer Brennkraftmaschinen
DE1439995C3 (de) * 1964-11-27 1974-02-07 Beru-Werk Albert Ruprecht, 7140 Ludwigsburg Funkentstörtes Kondensatorzündgerät
JPS5459531A (en) * 1977-10-20 1979-05-14 Nissan Motor Co Ltd High voltage wire for igniter
DE3023288C2 (de) * 1980-06-21 1986-01-09 Robert Bosch Gmbh, 7000 Stuttgart Entstörstecker zum Aufstecken auf dem Isolator einer Zündkerze oder dem Dorn eines Verteilers
DE9012746U1 (de) * 1990-09-07 1992-01-09 Robert Bosch Gmbh, 7000 Stuttgart Elektrische, funkenerzeugende Zündvorrichtung, insbesondere für gasförmige Brennstoffe
US5603306A (en) * 1995-02-03 1997-02-18 Tai; Tsai-Ting Ignition cable means for eliminating inerference
JP3534708B2 (ja) * 2000-03-28 2004-06-07 ノロジー エンジニアリング，インコーポレーテッド スパーク・プラグ・ケーブル及びスパーク・プラグ・ケーブルの調整方法
DE102004030790B4 (de) * 2004-06-25 2009-07-02 Deutz Power Systems Gmbh Zündkerze mit Zündkabel
DE102005060166B4 (de) 2005-12-14 2010-08-05 Multitorch Gmbh Zündkerze
DE102005060139B4 (de) * 2005-12-16 2010-02-04 Giese, Erhard, Dr. Zündkerze
DE102010010109B4 (de) * 2010-03-04 2012-03-15 Multitorch Gmbh Vorkammerzündkerze

Also Published As

Publication number Publication date
DE102016206993A1 (de) 2017-10-26
EP3281264B1 (fr) 2022-04-27
WO2017186239A1 (fr) 2017-11-02

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