EP3281263A1 - Zündkerze - Google Patents
ZündkerzeInfo
- Publication number
- EP3281263A1 EP3281263A1 EP17713153.9A EP17713153A EP3281263A1 EP 3281263 A1 EP3281263 A1 EP 3281263A1 EP 17713153 A EP17713153 A EP 17713153A EP 3281263 A1 EP3281263 A1 EP 3281263A1
- Authority
- EP
- European Patent Office
- 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.)
- Granted
Links
- 239000012212 insulator Substances 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910052790 beryllium Inorganic materials 0.000 claims description 3
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000013021 overheating Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910017709 Ni Co Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000575 Ir alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000007748 combinatorial effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 for example Inorganic materials 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016206992.6A DE102016206992A1 (de) | 2016-04-25 | 2016-04-25 | Zündkerze |
PCT/DE2017/200004 WO2017186238A1 (de) | 2016-04-25 | 2017-01-23 | Zündkerze |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3281263A1 true EP3281263A1 (de) | 2018-02-14 |
EP3281263B1 EP3281263B1 (de) | 2021-03-24 |
EP3281263B8 EP3281263B8 (de) | 2021-04-28 |
Family
ID=58410060
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17713153.9A Active EP3281263B8 (de) | 2016-04-25 | 2017-01-23 | Zündkerze |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3281263B8 (de) |
DE (1) | DE102016206992A1 (de) |
WO (1) | WO2017186238A1 (de) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
DE102019122529A1 (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 |
DE102019122527A1 (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 |
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 |
DE102020106397A1 (de) | 2020-03-10 | 2021-09-16 | 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 |
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 |
DE102020110395A1 (de) | 2020-04-16 | 2021-10-21 | 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 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2012516A1 (de) * | 1970-03-17 | 1971-09-30 | Daimler Benz Ag | Zündkerze, insbesondere fur Rotations kolben Brennkraftmaschinen |
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 |
DE102006043593B3 (de) * | 2006-09-16 | 2008-04-10 | Multitorch Gmbh | Zündkerze |
US8912716B2 (en) * | 2011-03-21 | 2014-12-16 | Denso International America, Inc. | Copper core combustion cup for pre-chamber spark plug |
JP2014007071A (ja) * | 2012-06-25 | 2014-01-16 | Nippon Soken Inc | 点火プラグ |
-
2016
- 2016-04-25 DE DE102016206992.6A patent/DE102016206992A1/de not_active Ceased
-
2017
- 2017-01-23 EP EP17713153.9A patent/EP3281263B8/de active Active
- 2017-01-23 WO PCT/DE2017/200004 patent/WO2017186238A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP3281263B1 (de) | 2021-03-24 |
EP3281263B8 (de) | 2021-04-28 |
DE102016206992A1 (de) | 2017-10-26 |
WO2017186238A1 (de) | 2017-11-02 |
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