EP3281264B1 - Bougie d'allumage - Google Patents

Bougie d'allumage Download PDF

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Publication number
EP3281264B1
EP3281264B1 EP17713154.7A EP17713154A EP3281264B1 EP 3281264 B1 EP3281264 B1 EP 3281264B1 EP 17713154 A EP17713154 A EP 17713154A EP 3281264 B1 EP3281264 B1 EP 3281264B1
Authority
EP
European Patent Office
Prior art keywords
spark plug
plug according
ignition
supply line
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
EP17713154.7A
Other languages
German (de)
English (en)
Other versions
EP3281264A1 (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
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Filing date
Publication date
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Publication of EP3281264A1 publication Critical patent/EP3281264A1/fr
Application granted granted Critical
Publication of EP3281264B1 publication Critical patent/EP3281264B1/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
    • H01T13/02—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 a prechamber spark plug, with a housing, an ignition electrode and a ground electrode, with a supply line for applying electrical voltage to the ignition electrode being arranged and with the supply line having a front area facing the ignition electrode and a rear area facing an ignition coil .
  • these are used to ignite the compressed fuel-air mixture in the combustion chamber of the cylinder.
  • a high-voltage spark at the spark plug ignites the compressed fuel-air mixture.
  • the EP 1 961 090 A1 describes a spark plug comprising an ignition electrode and a ground electrode.
  • the spark plug has an extended tubular housing in which runs a supply line for applying electrical voltage to the ignition electrode.
  • the supply line includes 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, resulting in a defined resistance that acts as an interference suppression resistor.
  • the interference suppression resistor is used to suppress the high-frequency interference pulses generated by the ignition sparks in order to comply with the limit values specified for electromagnetic compatibility (EMC).
  • EMC electromagnetic compatibility
  • a spark plug according to the preamble of claim 1 is off DE 862 977 C , DE 14 39 995 A1 or DE 30 23 288 A1 famous
  • a problem with the known spark plugs is that they are exposed to high temperatures during operation, so that the interference suppression resistor is also heated. Furthermore, the interference suppression resistor heats up due to the current flowing. This leads to the electrical resistance of the interference suppression resistor changing, namely due to the increased temperature. Furthermore, the interference suppression resistor heats up the spark plug as a whole, which has a negative effect on the ignition and thus affects the service life of the spark plug and the function of the engine.
  • the present invention is therefore based on the object of designing and developing a spark plug of the type mentioned at the outset in such a way that reliable interference suppression while avoiding excessive heating is ensured using structurally simple means.
  • the above object is achieved by the features of claim 1. Accordingly, the spark plug in question is characterized in that only the ignition cable has a sufficiently high electrical resistance to act as an interference suppression resistor.
  • an interference suppression resistor does not necessarily have to be provided in the front area of the supply line.
  • interference suppression can be implemented in an incredibly simple manner in that only the rear region of the supply line has a sufficiently high electrical resistance and thus acts as an interference suppression resistor. Due to the lack of interference suppression resistance in the front area of the supply line, the heat development is extremely low, so that the ignition properties are significantly improved. Furthermore, the construction according to the invention has a positive effect on the service life of the spark plug.
  • interference suppression resistance is to be understood in the broadest sense, namely remote interference suppression - reducing the interference field strength to protect radio and television reception - and/or local interference suppression - for example reducing the interference field strength to avoid interference in the Alternator - may include.
  • the second area of the supply line can advantageously 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 k ⁇ /m to 6 k ⁇ /m has proven to be particularly advantageous for the realization of an interference suppression resistor.
  • the second area of the supply line is implemented by an ignition cable.
  • This can be a commercially available ignition cable, which has a correspondingly high electrical resistance, so that it acts as an interference suppression resistor.
  • the spark plug is particularly simple and inexpensive to manufacture.
  • it can be a reactance ignition line that has a silicone jacket that surrounds a textile braid. Silicone insulation can be provided within the textile mesh, which surrounds a stainless steel resistance wire, which ensures optimum high-voltage transmission with constant resistance values.
  • a ferromagnetic silicone which is held by a carrier, can be arranged inside the stainless steel resistance wire in order to implement the interference suppression effect.
  • the front area of the supply line can have an electrical conductor.
  • the electrical conductor can be a wire, for example.
  • the electrical conductor can be surrounded by a seal at least in certain areas. Ideally, the seal can be a glass melt.
  • the electrical conductor can have a diameter of less than one millimeter, preferably less than 0.7 mm. Ideally, the electrical conductor can have a diameter of 0.1 mm to 0.2 mm. In order to achieve the lowest possible electrical resistance, the electrical conductor can be made of nickel or a nickel alloy.
  • the front area has an electrode pin which has an ignition electrode carrier at one end and an ignition electrode carrier at the other end connected to the electrical conductor. This arrangement ensures that the required supply voltage is applied to the ignition electrode extremely effectively.
  • the electrode pin can have a copper core.
  • an insulator can be formed, which at least partially encloses the front area.
  • the insulator can preferably consist of a ceramic, for example aluminum oxide, aluminum nitride or a composite material comprising aluminum nitride or aluminum oxide.
  • a housing extension for example made of steel, can be attached to the housing of the spark plug.
  • the housing extension can 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 can be a gel, for example, in particular a silicone gel. This can preferably be a pourable two-component mixture.
  • FIG. 1 and 2 an embodiment of a spark plug according to the invention is shown. This is a prechamber spark plug, it being expressly pointed out that the device according to the invention does not necessarily have to be designed as a prechamber spark plug.
  • the spark plug comprises a cap 2 serving as a ground electrode 1 .
  • An ignition electrode 4 is arranged inside the prechamber 3 formed by the cap 2 .
  • a housing 5 adjoins the cap 2 , namely it is connected to the cap 2 via a weld seam 6 .
  • a thread 7 and a seal 8 are formed on the housing 5, so that the spark plug can be securely connected to the ignition chamber and closes it off.
  • a section of the housing 5 to be of conical design, so that the spark plug can be connected to the ignition chamber by means of a clamp.
  • the ignition electrode 4 is realized in the form of two strips, each with ends curved in an arc.
  • the strips each have two ends that act as an ignition surface. It is conceivable that the strips consist of an iridium alloy or a platinum alloy.
  • a supply line 9 which has a front area 10 and a rear area 11 .
  • the front area 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 consisting of nickel or 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 can be implemented as glass melt, for example.
  • the front portion 10 is surrounded by an insulator 16 which may be made of a ceramic such as aluminum oxide or aluminum nitride. Due to the construction of the front area 10, it has an extremely low electrical resistance.
  • An ignition cable 17 connects to the electrical conductor 13, which forms the rear region 11 and is therefore an integral or fixed part of the spark plug.
  • a connecting means 18 is provided on the end of the ignition cable 17 facing the ignition coil in order to ensure a secure mechanical and electrical connection to 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 that is sufficient to act as an interference suppression resistor. Thus, the suppression resistance is realized exclusively by the rear area 11, namely the ignition cable 17. This optimizes the heat development of the spark plug with remarkably simple means and reliable interference suppression is guaranteed.
  • a housing extension 19 is arranged on the housing 5 .
  • the housing extension 19 is tubular and is connected to the housing via a weld seam 20 .
  • the housing extension 19 encloses at least a portion of the front portion 10 and the rear portion 11 .
  • An electrically insulating material 21 for example a silicone gel, is arranged between the front area 10 or the rear area 11 and the housing extension 19 .
  • the insulating material 21 can have a dielectric strength of more than 5 kV/mm.
  • a point of attack 22 for a handling means is also shown. This can be a hexagon, for example, so that the spark plug can be screwed into the ignition chamber with a corresponding key.

Landscapes

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

Claims (12)

  1. Bougie d'allumage, plus particulièrement bougie d'allumage de pré-chambre, avec un boîtier (5), une électrode d'allumage (4), une électrode de masse (1) et une ligne d'alimentation (9), dans laquelle la ligne d'alimentation (9) permet l'alimentation de l'électrode d'allumage (4) avec une tension électrique et dans laquelle la ligne d'alimentation (9) comprend une partie avant (10) orientée vers l'électrode d'allumage (4) et une partie arrière (11) orientée vers une bobine d'allumage, dans laquelle la partie arrière (11) est réalisée à l'aide d'un câble d'allumage (17), caractérisée en ce que seul le câble d'allumage (17) présente une résistance électrique suffisamment élevée pour agir comme une résistance antiparasitage.
  2. Bougie d'allumage selon la revendication 1, caractérisée en ce que la partie arrière (11) présente une résistance électrique de 3 kΩ/m à 10 kΩ/m, plus particulièrement de 4 kΩ/m à 8 kΩ/m, de préférence de 5 kΩ/m à 6 kΩ/m.
  3. Bougie d'allumage selon la revendication 1 ou 2, caractérisée en ce que la partie avant (10) comprend un conducteur électrique (13), plus particulièrement un fil.
  4. Bougie d'allumage selon la revendication 3, caractérisée en ce que le conducteur électrique (13) est entouré, au moins à certains endroits, par un dispositif d'étanchéité (15), plus particulièrement du verre fondu.
  5. Bougie d'allumage selon la revendication 3 ou 4, caractérisée en ce que le conducteur électrique (13) présente un diamètre inférieur à 1,0 mm, de préférence inférieur à 0,7 mm.
  6. Bougie d'allumage selon l'une des revendications 3 à 5, caractérisée en ce que le conducteur électrique (13) est constitué de nickel ou d'un alliage de nickel.
  7. Bougie d'allumage selon l'une des revendications 3 à 6, caractérisée en ce que la partie avant (10) comprend une tige d'électrode (12) qui est reliée, à une extrémité, avec un support d'électrode d'allumage (14) et, à l'autre extrémité, avec le conducteur électrique (13).
  8. Bougie d'allumage selon la revendication 7, caractérisée en ce que la tige d'électrode (12) comprend un noyau de cuivre.
  9. Bougie d'allumage selon l'une des revendications 1 à 8, caractérisée en ce qu'un isolateur (16), de préférence en céramique, entoure au moins partiellement la partie avant (10).
  10. Bougie d'allumage selon l'une des revendications 1 à 9, caractérisée en ce qu'un prolongement de boîtier (19), plus particulièrement tubulaire, se raccorde au boîtier (5).
  11. Bougie d'allumage selon la revendication 10, caractérisée en ce que le prolongement de boîtier (19) entoure au moins une partie de la ligne d'alimentation (9) et en ce que, entre le prolongement de boîtier (19) et la ligne d'alimentation (9), est disposé un matériau électriquement isolant (21).
  12. Bougie d'allumage selon la revendication 11, caractérisée en ce que le matériau électriquement isolant (21) est un gel, plus particulièrement un gel au silicone.
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 EP3281264A1 (fr) 2018-02-14
EP3281264B1 true 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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5459531A (en) * 1977-10-20 1979-05-14 Nissan Motor Co Ltd High voltage wire for igniter
US5603306A (en) * 1995-02-03 1997-02-18 Tai; Tsai-Ting Ignition cable means for eliminating inerference
JP2001317440A (ja) * 2000-03-28 2001-11-16 Nology Engineering Inc 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

Family Cites Families (9)

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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
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 (fr) * 1990-09-07 1992-01-09 Robert Bosch Gmbh, 7000 Stuttgart, De
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5459531A (en) * 1977-10-20 1979-05-14 Nissan Motor Co Ltd High voltage wire for igniter
US5603306A (en) * 1995-02-03 1997-02-18 Tai; Tsai-Ting Ignition cable means for eliminating inerference
JP2001317440A (ja) * 2000-03-28 2001-11-16 Nology Engineering Inc 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

Also Published As

Publication number Publication date
EP3281264A1 (fr) 2018-02-14
DE102016206993A1 (de) 2017-10-26
WO2017186239A1 (fr) 2017-11-02

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