WO2017186238A1 - Bougie d'allumage - Google Patents

Bougie d'allumage Download PDF

Info

Publication number
WO2017186238A1
WO2017186238A1 PCT/DE2017/200004 DE2017200004W WO2017186238A1 WO 2017186238 A1 WO2017186238 A1 WO 2017186238A1 DE 2017200004 W DE2017200004 W DE 2017200004W WO 2017186238 A1 WO2017186238 A1 WO 2017186238A1
Authority
WO
WIPO (PCT)
Prior art keywords
spark plug
housing part
plug according
housing
insulator
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.)
Ceased
Application number
PCT/DE2017/200004
Other languages
German (de)
English (en)
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
Priority to EP17713153.9A priority Critical patent/EP3281263B8/fr
Publication of WO2017186238A1 publication Critical patent/WO2017186238A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H01T13/54—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
    • 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
    • H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
    • H01T13/32—Sparking plugs characterised by features of the electrodes or insulation characterised by features of the earthed electrode

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 the ignition electrode is acted upon via a supply line with an electrical voltage and wherein the supply line extends at least partially within an insulator.
  • 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.
  • WO 2008/031482 A1 describes a spark plug comprising an ignition electrode and a ground electrode.
  • the spark plug has a casing formed of a casing head and a holder which accommodates a part of an insulator.
  • the insulator encloses a supply line, which serves for acting on the ignition electrode with electrical voltage.
  • the housing head is made of steel and connected to the made of a nickel-iron alloy holder via a weld.
  • the nickel-iron alloy has a coefficient of thermal expansion which is less than the thermal expansion coefficient of the insulator, so that the bias voltage with which the insulator is arranged in the housing also increases with increasing temperature.
  • the spark plug in question is characterized in that at least one discharge region of the housing is made of a material having a thermal conductivity of over 150 W / mK.
  • the underlying object can be achieved by the arrangement of a discharge region on the housing in a surprisingly simple manner.
  • the discharge region serves to dissipate the heat of combustion introduced into the spark plug to the environment.
  • the discharge region is made of a material with a thermal conductivity of over 150 W / mK, so that a sufficiently high heat dissipation is ensured and can advantageously connect directly to the ground electrode.
  • This simple constructional measure reliably prevents overheating of the spark plug, in particular the areas relevant to the service life of the spark plug. As a result, the occurrence of pre-ignition or knocking burns in the area of the spark plug can be considerably reduced.
  • the discharge region has a thermal conductivity which is above the thermal conductivity of steel, which is known from the prior art material for the production of the housing. Contrary to a prejudice in the art, it has been found that materials with a higher thermal conductivity are suitable for producing at least one region of the housing of a spark plug, despite the usually higher coefficient of thermal expansion associated therewith. It should be noted at this point that the specified thermal conductivity relates in particular to the relevant temperature range for a spark plug. The thermal conductivity is stated in units of watts per meter and Kelvin.
  • the discharge region may have a thermal conductivity of over 200 W / mK. With such a high thermal conductivity overheating of the spark plug is almost impossible, so that the problems caused by the overheating problems are effectively avoided.
  • the discharge region can be made of copper, a copper alloy or a copper-based alloy comprising fractions of nickel and / or beryllium.
  • the housing may be integrally formed.
  • the entire housing may be formed as a discharge region.
  • the housing has a front housing part and a rear housing part, thus constructed in two parts.
  • the front housing part is connected to the rear housing part via a weld.
  • the weld can be produced, for example, by tungsten inert gas welding (TIG), plasma welding, electron welding or laser welding.
  • the discharge region can be realized by the front housing part, this thus be made in total of a material having a thermal conductivity of about 150 W / mK. This further improves the dissipation of the process heat and simplifies the design of the spark plug.
  • the front housing part is particularly suitable for one of the above welding method due to its high thermal conductivity.
  • the discharge region may be formed by the rear housing part.
  • the rear housing part can have a coefficient of thermal expansion which is smaller or smaller is equal to the thermal expansion coefficient of the insulator.
  • the rear housing part of a nickel-iron alloy for example, Ni Co 29/18 with a thermal expansion coefficient ⁇ of 5 ⁇ 10- 6 1 / K to 8 ⁇ 10 " 6 1 / K), wherein the insulator of a Ceramics, in particular aluminum oxide (coefficient of thermal expansion ⁇ of about 8.5 ⁇ 10 " 6 1 / K) or aluminum nitride can be produced.
  • the outer side of the housing may be at least partially conical and / or have a thread.
  • This can be a suitably designed front housing part in a particularly advantageous manner. This ensures a secure connection and sealing between the spark plug and the cylinder.
  • a particularly secure connection between housing and insulator can be realized by the housing engages behind the insulator and holds under pretension in the housing, preferably to a sealing ring, in particular of copper, presses.
  • the rear housing part engage behind the insulator and hold under prestress in the housing.
  • the front housing part is designed overall as a discharge region and is connected to the rear housing part via a weld seam, the rear housing part having a thermal expansion coefficient which is less than or equal to the thermal expansion coefficient of the insulation body.
  • the dissipation of the heat from the spark plug is enabled by the front housing part, wherein the rear housing part holds the insulator with a higher bias in the housing due to its low thermal expansion coefficient, the higher the temperature rises.
  • the front housing part which has a high thermal conductivity, compensated and the cylinder reliably closed by the spark plug.
  • FIGURE shows an embodiment of a spark plug according to the invention. This is a pre-chamber spark plug, it being expressly pointed out that the device according to the invention can be designed as any kind of spark plug.
  • the spark plug comprises a cap 2 serving as a ground electrode 1, which consists for example of nickel or a nickel alloy. Within the antechamber 3 formed by the cap 2, an ignition electrode 4 is arranged.
  • the cap 2 is connected via a weld 5 to the housing 6.
  • the housing 6 is formed by a front housing part 7 and a rear housing part 8.
  • the front housing part 7 connects directly to the ground electrode 1 and serves as a discharge region 9, namely to derive the registered in the spark plug combustion heat.
  • the discharge region 9, i. the front housing part 7, made of a material with a high thermal conductivity of over 150 W / mK or of over 200 W / mK.
  • the dissipation region can be made of copper or a copper-based alloy with small amounts of nickel and / or beryllium.
  • a thread 10 is formed, via which the spark plug can be screwed into the cylinder.
  • the front housing part 7 at least partially tapered to achieve a clamping with the cylinder.
  • 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 ignition surfaces. It is conceivable that the strips consist of an iridium alloy or a platinum alloy.
  • a supply line which extends within the insulator 11.
  • the isolator 1 1 is for example made of a ceramic, especially alumina (thermal expansion coefficient ⁇ of approximately 8.5 x 10- 6 1 / K) or aluminum nitride.
  • the front housing part 7 is connected to the rear housing part 8 via a weld 12.
  • the rear housing part 8 engages behind a projection 13 of the insulator 1 1, so that the insulator 1 1 is held with bias within the housing 6.
  • the rear housing part 8 is made of a material which - at least in the relevant temperature range for a spark plug - has a lower coefficient of thermal expansion than the material of the insulator 1 1.
  • This may be in particular a nickel-iron alloy ( Ni Co of 5 x 10 "6 1 / K to 8 ⁇ 10" 6 1 / K) act 29/18 ⁇ with thermal expansion coefficient.
  • Ni Co of 5 x 10 "6 1 / K to 8 ⁇ 10" 6 1 / K act 29/18 ⁇ with thermal expansion coefficient.
  • a sealing ring 14 is arranged, which consists for example of copper.
  • the rear housing part 8 has an engagement point 15, for example a hexagon, for a handling means, so that the spark plug can be screwed into the ignition space with a corresponding tool.

Landscapes

  • Spark Plugs (AREA)

Abstract

L'invention concerne une bougie d'allumage, notamment une bougie d'allumage de chambre de précombustion, comprenant un boîtier (6), une électrode d'allumage (4) et une électrode de masse (1), l'électrode d'allumage (4) pouvant être alimentée en tension électrique par un câble d'alimentation, le câble d'alimentation s'étendant au moins par endroits dans un isolateur (11), caractérisée en ce qu'au moins une zone de dissipation (9) du boîtier (6) est fabriquée dans un matériau de conductivité thermique supérieure à 150 W/m K.
PCT/DE2017/200004 2016-04-25 2017-01-23 Bougie d'allumage Ceased WO2017186238A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17713153.9A EP3281263B8 (fr) 2016-04-25 2017-01-23 Bougie d'allumage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016206992.6 2016-04-25
DE102016206992.6A DE102016206992A1 (de) 2016-04-25 2016-04-25 Zündkerze

Publications (1)

Publication Number Publication Date
WO2017186238A1 true WO2017186238A1 (fr) 2017-11-02

Family

ID=58410060

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2017/200004 Ceased WO2017186238A1 (fr) 2016-04-25 2017-01-23 Bougie d'allumage

Country Status (3)

Country Link
EP (1) EP3281263B8 (fr)
DE (1) DE102016206992A1 (fr)
WO (1) WO2017186238A1 (fr)

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DE102018206784A1 (de) * 2018-05-03 2019-11-07 Robert Bosch Gmbh Vorkammer-Zündkerze
JP7159810B2 (ja) * 2018-11-22 2022-10-25 トヨタ自動車株式会社 副室付内燃機関
JP7227842B2 (ja) * 2019-05-07 2023-02-22 日本特殊陶業株式会社 スパークプラグ
DE102019116191A1 (de) * 2019-06-14 2020-12-17 Bayerische Motoren Werke Aktiengesellschaft Vorkammerzündsystem für eine fremd gezündete Hubkolben-Brennkraftmaschine
DE102019122527A1 (de) * 2019-08-21 2021-02-25 Bayerische Motoren Werke Aktiengesellschaft Vorkammerzündsystem für eine fremd gezündete Hubkolben-Brennkraftmaschine
DE102019122526A1 (de) * 2019-08-21 2021-02-25 Bayerische Motoren Werke Aktiengesellschaft Vorkammerzündsystem für eine fremd gezündete Hubkolben-Brennkraftmaschine
DE102019122532A1 (de) * 2019-08-21 2021-02-25 Bayerische Motoren Werke Aktiengesellschaft Vorkammerzündsystem für eine fremd gezündete Hubkolben-Brennkraftmaschine
DE102019122530A1 (de) * 2019-08-21 2021-02-25 Bayerische Motoren Werke Aktiengesellschaft Vorkammerzündsystem für eine fremd gezündete Hubkolben-Brennkraftmaschine
DE102019122531A1 (de) * 2019-08-21 2021-02-25 Bayerische Motoren Werke Aktiengesellschaft Fremd gezündete Hubkolben-Brennkraftmaschine mit einem Vorkammerzündsystem
DE102019122529A1 (de) * 2019-08-21 2021-02-25 Bayerische Motoren Werke Aktiengesellschaft Vorkammerzündsystem für eine fremd gezündete Hubkolben-Brennkraftmaschine
DE102019122559A1 (de) * 2019-08-22 2021-02-25 Bayerische Motoren Werke Aktiengesellschaft Fremd gezündete Hubkolben-Brennkraftmaschine mit einem Vorkammerzündsystem
DE102019126964A1 (de) * 2019-10-08 2021-04-08 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Betreiben einer fremd gezündeten Viertakt-Hubkolben-Brennkraftmaschine mit einem Vorkammerzündsystem
DE102019126963A1 (de) * 2019-10-08 2021-04-08 Bayerische Motoren Werke Aktiengesellschaft Vorkammerzündsystem für eine fremd gezündete Hubkolben-Brennkraftmaschine
DE102019131360B4 (de) 2019-11-20 2024-05-02 Bayerische Motoren Werke Aktiengesellschaft Zylinderkopf für eine fremd gezündete Hubkolben-Brennkraftmaschine
DE102020101552A1 (de) 2020-01-23 2021-07-29 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Betreiben einer fremd gezündeten Hubkolben-Brennkraftmaschine
DE102020103863B4 (de) 2020-02-14 2023-04-27 Bayerische Motoren Werke Aktiengesellschaft Fremd gezündete Hubkolben-Brennkraftmaschine mit einem Vorkammerzündsystem
DE102020105924A1 (de) 2020-03-05 2021-09-09 Bayerische Motoren Werke Aktiengesellschaft Fremd gezündete Hubkolben-Brennkraftmaschine mit einem Vorkammerzündsystem
DE102020105921A1 (de) 2020-03-05 2021-09-09 Bayerische Motoren Werke Aktiengesellschaft Fremd gezündete Hubkolben-Brennkraftmaschine mit einem Vorkammerzündsystem
DE102020106398A1 (de) 2020-03-10 2021-09-16 Bayerische Motoren Werke Aktiengesellschaft Fremd gezündete Hubkolben-Brennkraftmaschine mit einem Vorkammerzündsystem
DE102020106397B4 (de) 2020-03-10 2024-08-29 Bayerische Motoren Werke Aktiengesellschaft Fremd gezündete Hubkolben-Brennkraftmaschine mit einem Vorkammerzündsystem
DE102020107370A1 (de) 2020-03-18 2021-09-23 Bayerische Motoren Werke Aktiengesellschaft Fremd gezündete Hubkolben-Brennkraftmaschine mit einem Vorkammerzündsystem
DE102020107368A1 (de) 2020-03-18 2021-09-23 Bayerische Motoren Werke Aktiengesellschaft Fremd gezündete Hubkolben-Brennkraftmaschine mit einem Vorkammerzündsystem
DE102020107841A1 (de) 2020-03-23 2021-09-23 Bayerische Motoren Werke Aktiengesellschaft Fremd gezündete Hubkolben-Brennkraftmaschine mit einem Vorkammerzündsystem
DE102020108564A1 (de) 2020-03-27 2021-09-30 Bayerische Motoren Werke Aktiengesellschaft Fremd gezündete Hubkolben-Brennkraftmaschine mit einem Vorkammerzündsystem
DE102020109161A1 (de) 2020-04-02 2021-10-07 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Betreiben einer fremd gezündeten Viertakt-Hubkolben-Brennkraftmaschine mit einem Vorkammerzündsystem
DE102020110395B4 (de) 2020-04-16 2026-04-16 Bayerische Motoren Werke Aktiengesellschaft Fremd gezündete Hubkolben-Brennkraftmaschine mit einem Vorkammerzündsystem
DE102020215946A1 (de) * 2020-12-15 2022-06-15 Robert Bosch Gesellschaft mit beschränkter Haftung Wärmeoptimierte Vorkammerzündkerze
DE102023105825B3 (de) 2023-03-09 2024-08-01 Bayerische Motoren Werke Aktiengesellschaft Vorkammerzündeinrichtung für eine Verbrennungskraftmaschine, insbesondere eines Kraftfahrzeugs, sowie Verbrennungskraftmaschine, insbesondere für ein Kraftfahrzeug
DE102023004632A1 (de) * 2023-11-15 2025-05-15 Mercedes-Benz Group AG Vorkammerzündeinrichtung für eine Verbrennungskraftmaschine sowie Verbrennungskraftmaschine
DE102023004631B4 (de) * 2023-11-15 2026-03-05 Mercedes-Benz Group AG Vorkammerzündeinrichtung für eine Verbrennungskraftmaschine sowie Verbrennungskraftmaschine für ein Kraftfahrzeug

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3719850A (en) * 1970-03-17 1973-03-06 Daimler Benz Ag Spark plug especially for rotary piston internal combustion engines
WO2008031482A1 (fr) 2006-09-16 2008-03-20 Multitorch Gmbh Bougie d'allumage
DE102012102009A1 (de) * 2011-03-21 2012-09-27 Denso International America, Inc. Kupferkern-Zündungsbecher für Vorkammer-Zündkerze
WO2014001901A1 (fr) * 2012-06-25 2014-01-03 Toyota Jidosha Kabushiki Kaisha Bougie d'allumage

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
DE68924526T2 (de) * 1989-01-09 1996-04-04 Ngk Spark Plug Co Zündkerzenzusammenbau.
FR2846042B1 (fr) * 2002-10-18 2005-02-04 Peugeot Citroen Automobiles Sa Dispositif d'allumage a prechambre realisee dans un materiau a conductivite thermique elevee, pour un moteur a combustion interne, et allumeur a prechambre

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3719850A (en) * 1970-03-17 1973-03-06 Daimler Benz Ag Spark plug especially for rotary piston internal combustion engines
WO2008031482A1 (fr) 2006-09-16 2008-03-20 Multitorch Gmbh Bougie d'allumage
DE102012102009A1 (de) * 2011-03-21 2012-09-27 Denso International America, Inc. Kupferkern-Zündungsbecher für Vorkammer-Zündkerze
WO2014001901A1 (fr) * 2012-06-25 2014-01-03 Toyota Jidosha Kabushiki Kaisha Bougie d'allumage

Also Published As

Publication number Publication date
EP3281263B8 (fr) 2021-04-28
EP3281263A1 (fr) 2018-02-14
EP3281263B1 (fr) 2021-03-24
DE102016206992A1 (de) 2017-10-26

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