EP0311608B1 - Zündkerze mit gleitfunkenstrecke - Google Patents
Zündkerze mit gleitfunkenstrecke Download PDFInfo
- Publication number
- EP0311608B1 EP0311608B1 EP19870903248 EP87903248A EP0311608B1 EP 0311608 B1 EP0311608 B1 EP 0311608B1 EP 19870903248 EP19870903248 EP 19870903248 EP 87903248 A EP87903248 A EP 87903248A EP 0311608 B1 EP0311608 B1 EP 0311608B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- platinum
- electrode
- discharge section
- surface discharge
- counter
- 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.)
- Expired - Lifetime
Links
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 18
- 239000000919 ceramic Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 claims abstract description 5
- 238000006073 displacement reaction Methods 0.000 claims abstract description 3
- 238000005245 sintering Methods 0.000 claims abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract 7
- 229910052593 corundum Inorganic materials 0.000 claims abstract 5
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract 5
- 238000000576 coating method Methods 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 239000012212 insulator Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000012799 electrically-conductive coating Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000000156 glass melt Substances 0.000 description 1
Images
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
- H01T13/52—Sparking plugs characterised by a discharge along a surface
Definitions
- the invention relates to a spark plug with sliding spark gap according to the preamble of the main claim.
- a spark plug with sliding spark gap is known, in which the insulator body is cross-divided and has a connection-side upper part made of a material with a relatively low dielectric constant and a lower part on the combustion chamber side made of a material with a much higher dielectric constant.
- Such spark plugs are in perfect working order, but are relatively complicated to manufacture due to the split insulator.
- the spark plug according to the invention with the characterizing features of the main claim has the advantage that it is easy to manufacture by thick-film technology and the sliding spark layers are highly effective and long-term stable.
- FIG. 1 An embodiment of the invention is shown in the drawing and explained in more detail in the following description.
- the figure shows an embodiment in a schematic, sectional representation.
- the spark plug consists of a spark plug body 1 made of aluminum oxide, with a bore 2 in the part on the combustion chamber side, in which there is a T-shaped component 3, which consists, for example, of aluminum oxide and has various surface coatings.
- the counter electrode is indicated by 4.
- the component 3 carries a coating 5 inside the spark plug body 1 and within the bore 2, as well as a little further, which is electrically conductive and consists either of platinum or of a platinum / Al 2 O 3 mixture 60 to 85 wt .-% platinum and has a thickness of 5 to 15 microns. This coating forms a central electrode.
- the coating 6, which forms the counter electrode 4 is made of the same material from the other end of the flange part 3.
- the counterelectrode is in electrical contact with the counterelectrode exclusion 4.
- the electrically conductive coating 5 is contacted within the spark plug body 1 by means of an electrically conductive glass 7 in the form of a glass melt flow, as is known, for example, from US Pat. No. 3,909,459
- the sliding spark layer 8 between the coatings 5 and 6 consists of a platinum / A] 2 0 3 mixture with 10 to 40 wt .-% platinum, which after sintering has the property of not having any intrinsic conductivity, since individual conductivity islands form have no electrical contact with each other, but allow high displacement currents, which corresponds to a high dielectric constant.
- This coating 8 is also applied in a thickness of 5 to 15 ⁇ m.
- the T-shaped component 3 is first made from aluminum oxide and annealed at 1100 to 1150 ° C., but not yet sintered.
- the electrically conductive coatings 5 and 6 are then applied to this component 3 by dipping or printing and then by printing or brushing the sliding spark layer 8 applied.
- the component 3 with the coatings 5, 6 and 8 is then introduced from the inside into the bore 2 of the spark plug body 1, which has a diameter that is just right, and which is also only burned.
- the whole is then sintered at temperatures between 1500 and 1600 ° C in the usual manner, with a firm fit being formed between component 3 and spark plug body 1 and the sliding spark layer 8 receiving the properties described above.
- the electrically conductive glass 7 is then filled in the form of a glass melting foot and the connection of the center electrode, not shown in the figure, is introduced, whereupon the whole thing at a melting temperature suitable for the respective type of glass, which is in the range between 800 and 900 ° C may lie, is melted down. After cooling, the whole is crimped in a gas-tight manner into the spark plug housing (not shown) with the degenerate electrodes formed on it so that the counterelectrode 6 and the counterelectrode terminal 4 touch.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3619854 | 1986-06-12 | ||
DE19863619854 DE3619854A1 (de) | 1986-06-12 | 1986-06-12 | Zuendkerze mit gleitfunkenstrecke |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0311608A1 EP0311608A1 (de) | 1989-04-19 |
EP0311608B1 true EP0311608B1 (de) | 1991-10-16 |
Family
ID=6302904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19870903248 Expired - Lifetime EP0311608B1 (de) | 1986-06-12 | 1987-05-23 | Zündkerze mit gleitfunkenstrecke |
Country Status (5)
Country | Link |
---|---|
US (1) | US4939409A (ja) |
EP (1) | EP0311608B1 (ja) |
JP (1) | JPH01502945A (ja) |
DE (2) | DE3619854A1 (ja) |
WO (1) | WO1987007778A1 (ja) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4089012B2 (ja) * | 1997-09-24 | 2008-05-21 | 株式会社デンソー | スパークプラグ |
US6078130A (en) * | 1997-11-10 | 2000-06-20 | Altronic, Inc. | Spark plug with specific construction to avoid unwanted surface discharge |
WO1999031775A1 (en) * | 1997-12-17 | 1999-06-24 | Dawson Royalties Limited | Spark plug |
US7224108B2 (en) * | 2001-02-15 | 2007-05-29 | Integral Technologies, Inc. | Low cost spark plug manufactured from conductive loaded resin-based materials |
DE502004003751D1 (de) * | 2004-01-05 | 2007-06-21 | Ford Global Tech Llc | Zündkerze |
US20070188064A1 (en) * | 2006-02-13 | 2007-08-16 | Federal-Mogul World Wide, Inc. | Metallic insulator coating for high capacity spark plug |
US8278808B2 (en) * | 2006-02-13 | 2012-10-02 | Federal-Mogul Worldwide, Inc. | Metallic insulator coating for high capacity spark plug |
US8436520B2 (en) | 2010-07-29 | 2013-05-07 | Federal-Mogul Ignition Company | Electrode material for use with a spark plug |
JP5887358B2 (ja) | 2010-12-29 | 2016-03-16 | フェデラル−モーグル・イグニション・カンパニーFederal−Mogul Ignition Company | 改善された隙間制御を有するコロナ点火装置 |
US8471451B2 (en) | 2011-01-05 | 2013-06-25 | Federal-Mogul Ignition Company | Ruthenium-based electrode material for a spark plug |
DE112012000600B4 (de) | 2011-01-27 | 2018-12-13 | Federal-Mogul Ignition Company | Zündkerzenelektrode für eine Zündkerze, Zündkerze und Verfahren zum Herstellen einer Zündkerzenelektrode |
WO2012116062A2 (en) | 2011-02-22 | 2012-08-30 | Federal-Mogul Ignition Company | Electrode material for a spark plug |
WO2013003325A2 (en) | 2011-06-28 | 2013-01-03 | Federal-Mogul Ignition Company | Electrode material for a spark plug |
US10044172B2 (en) | 2012-04-27 | 2018-08-07 | Federal-Mogul Ignition Company | Electrode for spark plug comprising ruthenium-based material |
WO2013177031A1 (en) | 2012-05-22 | 2013-11-28 | Federal-Mogul Ignition Company | Method of making ruthenium-based material for spark plug electrode |
US8979606B2 (en) | 2012-06-26 | 2015-03-17 | Federal-Mogul Ignition Company | Method of manufacturing a ruthenium-based spark plug electrode material into a desired form and a ruthenium-based material for use in a spark plug |
JP7022628B2 (ja) | 2017-03-31 | 2022-02-18 | 株式会社Soken | 内燃機関用のスパークプラグ |
JP7194550B2 (ja) | 2018-10-03 | 2022-12-22 | 株式会社Soken | 内燃機関用のスパークプラグ |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB645403A (en) * | 1939-02-14 | 1950-11-01 | Wijtze Beije Smits | Improvements in or relating to sparking plugs |
FR886454A (fr) * | 1942-06-01 | 1943-10-15 | Nouvelle bougie d'allumage | |
GB719628A (en) * | 1951-10-09 | 1954-12-08 | Plessey Co Ltd | Improvements in or relating to sparking plug assemblies |
DE2050330A1 (de) * | 1970-10-14 | 1972-04-20 | Daimler Benz Ag | Gleitfunkenzündkerze |
JPS5642981A (en) * | 1979-09-14 | 1981-04-21 | Ngk Spark Plug Co | Inignition plug and production thereof |
ZA805008B (en) * | 1979-10-22 | 1981-08-26 | Champion Spark Plug Co | Spark igniter |
DE3038720A1 (de) * | 1980-10-14 | 1982-06-03 | Robert Bosch Gmbh, 7000 Stuttgart | Zuendkerze fuer brennkraftmaschine |
-
1986
- 1986-06-12 DE DE19863619854 patent/DE3619854A1/de not_active Withdrawn
-
1987
- 1987-05-23 DE DE8787903248T patent/DE3773936D1/de not_active Expired - Lifetime
- 1987-05-23 JP JP62503147A patent/JPH01502945A/ja active Pending
- 1987-05-23 WO PCT/DE1987/000235 patent/WO1987007778A1/de active IP Right Grant
- 1987-05-23 US US07/290,168 patent/US4939409A/en not_active Expired - Fee Related
- 1987-05-23 EP EP19870903248 patent/EP0311608B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3773936D1 (de) | 1991-11-21 |
DE3619854A1 (de) | 1987-12-17 |
US4939409A (en) | 1990-07-03 |
JPH01502945A (ja) | 1989-10-05 |
WO1987007778A1 (en) | 1987-12-17 |
EP0311608A1 (de) | 1989-04-19 |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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