EP1131865A1 - Electrically conductive sealing mass for sparking plugs - Google Patents
Electrically conductive sealing mass for sparking plugsInfo
- Publication number
- EP1131865A1 EP1131865A1 EP99963235A EP99963235A EP1131865A1 EP 1131865 A1 EP1131865 A1 EP 1131865A1 EP 99963235 A EP99963235 A EP 99963235A EP 99963235 A EP99963235 A EP 99963235A EP 1131865 A1 EP1131865 A1 EP 1131865A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spark plug
- component
- plug according
- sealing compound
- metallic component
- 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.)
- Withdrawn
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
- H01T13/40—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
- H01T13/20—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
Definitions
- the invention relates to a spark plug according to the preamble of the main claim. Sealing compounds serve to seal a central electrode in an insulator of the spark plug.
- a spark plug of the generic type is known for example from DE-PS 22 45 403, in which the sealing compound for tightly fixing the center electrode in the insulator made of a mixture of a glass as a fusible component and of graphite and / or carbon black in powder form as an electrically conductive component consists.
- the sealing compound for tightly fixing the center electrode in the insulator made of a mixture of a glass as a fusible component and of graphite and / or carbon black in powder form as an electrically conductive component consists.
- copper or iron as conductive powdery substances.
- the spark plug according to the invention with the characterizing features of claim 1 has the advantage that the sealing compound has a higher thermal load capacity.
- the proposed metal-ceramic sealing compound has a defined melting point or a narrow melting interval, as a result of which the sealing compound can be stressed to just below the melting temperature of the metal used. As a result, the distance between the temperature of the melting point and the application temperature can be significantly reduced. This also allows the sealant to be used near the tip of the insulator. This makes it possible to use the sealing compound for nail-shaped platinum electrodes that have only a small axial extent at the tip of the insulator foot.
- a particularly temperature-stable sealing compound is achieved if the metallic component is 20 to 40% by volume and the ceramic component is 60 to 80% by volume.
- FIG. 1 shows a spark plug in a sectional view
- FIG. 2 shows the end of a second embodiment of the spark plug on the combustion chamber side
- FIG. 3 shows the Combustion chamber end of a third embodiment of the spark plug.
- the spark plug shown in FIG. 1 consists of an insulator 11 which is crimped gas-tight in a metallic housing 10, the rotationally symmetrical axes of the housing 10 and the insulator 11 being congruent.
- the insulator 11 has an insulator bore 12 in which one
- Inner conductor arrangement with a contact pin 13, a connection-side contact package 15, a burn-up resistor 17, a temperature-resistant sealing compound 16 and a center electrode 14 is arranged.
- a ground electrode 18 is also formed on the housing 10. The center electrode 14 and the ground electrode 18 protrude into a combustion chamber, not shown.
- the sealing compound 16 and the contact package 15 have the task of sealing the erosion resistance 17 against the ingress of oxygen during the melting process and during operation of the spark plug.
- the contact package 15 also has the task of fixing the contact pin 13 in the insulator bore 12.
- the sealing compound 16 has the same task with respect to the central electrode 14
- sealing compound 16 Due to its proximity to the combustion chamber, sealing compound 16 is exposed to a substantially higher thermal load than the contact package 15.
- Resilience essentially consists of a metallic component and a ceramic component.
- the metallic component consists of at least one metal powder and / or at least one powder of a metal alloy, the melting temperature of the metallic component is above the application temperature of the spark plug, for example 900 ° C. In order not to thermally overstress the load on the spark plug when the sealing compound 16 melts, it is expedient if the melting temperature of the metallic component is below 1000.degree.
- a ceramic powder with low thermal expansion such as, for example, mullite, sillimanite, AlN, Si 3 N 4 , silica glass or similar ceramic materials or a mixture of these materials, is suitable as the ceramic component.
- an active solder for example AgTi solder, can be used as the metallic component.
- FIG. 2 A second exemplary embodiment of the spark plug is shown in FIG. 2.
- This embodiment uses a nail-shaped platinum electrode 21, which is sintered into the insulator 11, for example.
- the platinum electrode 21 interacts, for example, with 2 or 4 ground electrodes 22.
- the insulator bore 12 is designed step-like. Starting from the platinum electrode 21 are a first bore section 24, a second bore section 25 and a third
- Bore section 26 executed, wherein the diameter of the first bore section 24 is smaller than the bore diameter of the second bore section 25 and the diameter of the third bore section 26 larger than the diameter of the second bore section 25.
- the contact package 15 On the combustion chamber side, the contact package 15 is followed by the erosion resistor 17, which extends essentially within the second bore section 25.
- the sealing compound 16 is located between the erosion resistor 17 and the platinum electrode 21 and is therefore located within the first bore section 24.
- the sealing compound 16 has the composition described in the first embodiment.
- FIG. 3 A third embodiment of a spark plug can be seen in FIG. 3, in which, in contrast to the embodiment in accordance with FIG. 2, another electrically conductive one between the erosion resistor 17 and the sealing compound 16
- the contact package 28 is arranged.
- the contact package 28 extends, for example, from the second bore section 25 into the third bore section 26. However, it can assume any other position, the only requirement being to ensure that the erosion resistor 17 and the sealing compound 16 retain their function.
- the further contact package 28, which is preceded by the sealing compound 17 on the combustion chamber side, does not have to have the high thermal resistance of the sealing compound 16. Consequently, the further contact package 28 can consist of a composition which, for. B. corresponds to the composition of the connection-side contact package 15.
- Such compositions are, for example, a mixture of glass and graphite and / or carbon black, which may contain a small amount of aluminum powder.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Spark Plugs (AREA)
- Gasket Seals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853844 | 1998-11-23 | ||
DE19853844A DE19853844A1 (en) | 1998-11-23 | 1998-11-23 | Spark plug has a temperature resistant, low thermal expansion sealant containing ceramic and metallic components |
PCT/DE1999/003622 WO2000031843A1 (en) | 1998-11-23 | 1999-11-13 | Electrically conductive sealing mass for sparking plugs |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1131865A1 true EP1131865A1 (en) | 2001-09-12 |
Family
ID=7888623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99963235A Withdrawn EP1131865A1 (en) | 1998-11-23 | 1999-11-13 | Electrically conductive sealing mass for sparking plugs |
Country Status (8)
Country | Link |
---|---|
US (1) | US6580202B1 (en) |
EP (1) | EP1131865A1 (en) |
JP (1) | JP2002530842A (en) |
CN (1) | CN1328719A (en) |
BR (1) | BR9915565A (en) |
DE (1) | DE19853844A1 (en) |
RU (1) | RU2236735C2 (en) |
WO (1) | WO2000031843A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10036008A1 (en) * | 2000-07-25 | 2002-02-07 | Bosch Gmbh Robert | Spark plug for an internal combustion engine and method for producing a spark plug |
CN1238097C (en) | 2000-09-08 | 2006-01-25 | 新日本制铁株式会社 | Ceramic/metal composite article, composite structure for transporting oxide ion, and composite article having sealing property |
DE10160301A1 (en) * | 2001-12-07 | 2003-06-18 | Bosch Gmbh Robert | Sealing device has ceramic base with peripheral groove(s) on outer wall in whose vicinity metal housing is pressed onto ceramic base in shape-locking manner and partially soldered |
DE10339759B4 (en) | 2003-08-27 | 2018-08-16 | Robert Bosch Gmbh | spark plug |
US7443089B2 (en) * | 2006-06-16 | 2008-10-28 | Federal Mogul World Wide, Inc. | Spark plug with tapered fired-in suppressor seal |
JP4970892B2 (en) * | 2006-10-24 | 2012-07-11 | 株式会社デンソー | Spark plug for internal combustion engine |
WO2008154115A2 (en) | 2007-05-17 | 2008-12-18 | Federal-Mogul Ignition Company | Small-diameter spark plug with resistive seal |
JP4948515B2 (en) * | 2008-12-26 | 2012-06-06 | 日本特殊陶業株式会社 | Plasma jet ignition plug |
JP6337529B2 (en) * | 2014-03-14 | 2018-06-06 | 株式会社デンソー | Spark plug |
JP5992022B2 (en) * | 2014-09-12 | 2016-09-14 | 日本特殊陶業株式会社 | Insulator and spark plug |
JP6422841B2 (en) * | 2015-10-20 | 2018-11-14 | 日本特殊陶業株式会社 | Spark plug |
JP6373313B2 (en) * | 2016-08-11 | 2018-08-15 | 日本特殊陶業株式会社 | Spark plug |
RU2678860C1 (en) * | 2018-02-12 | 2019-02-04 | Акционерное общество "Уфимское научно-производственное предприятие "Молния" | Gas turbine engine spark plug |
RU186491U1 (en) * | 2018-02-12 | 2019-01-22 | Акционерное общество "Уфимское научно-производственное предприятие "Молния" | GAS TURBINE ENGINE CANDLE |
CN114393264A (en) * | 2022-01-25 | 2022-04-26 | 扬州市飞鹰电子科技有限公司 | Ignition needle welding process |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2245403C2 (en) | 1972-09-15 | 1984-04-05 | Robert Bosch Gmbh, 7000 Stuttgart | Electrically conductive sealant for spark plugs and methods of manufacturing the same |
JPS5642981A (en) * | 1979-09-14 | 1981-04-21 | Ngk Spark Plug Co | Inignition plug and production thereof |
US4400643A (en) | 1979-11-20 | 1983-08-23 | Ngk Spark Plug Co., Ltd. | Wide thermal range spark plug |
DE3941649A1 (en) * | 1989-12-16 | 1991-06-20 | Bosch Gmbh Robert | METHOD FOR PRODUCING ELECTRODES FOR SPARK PLUGS AND SPARK PLUG ELECTRODES |
-
1998
- 1998-11-23 DE DE19853844A patent/DE19853844A1/en not_active Withdrawn
-
1999
- 1999-11-13 BR BR9915565-6A patent/BR9915565A/en not_active IP Right Cessation
- 1999-11-13 JP JP2000584570A patent/JP2002530842A/en active Pending
- 1999-11-13 CN CN99813588A patent/CN1328719A/en active Pending
- 1999-11-13 RU RU2001116576/06A patent/RU2236735C2/en not_active IP Right Cessation
- 1999-11-13 EP EP99963235A patent/EP1131865A1/en not_active Withdrawn
- 1999-11-13 US US09/856,204 patent/US6580202B1/en not_active Expired - Fee Related
- 1999-11-13 WO PCT/DE1999/003622 patent/WO2000031843A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO0031843A1 * |
Also Published As
Publication number | Publication date |
---|---|
US6580202B1 (en) | 2003-06-17 |
JP2002530842A (en) | 2002-09-17 |
RU2236735C2 (en) | 2004-09-20 |
BR9915565A (en) | 2002-01-08 |
CN1328719A (en) | 2001-12-26 |
WO2000031843A1 (en) | 2000-06-02 |
DE19853844A1 (en) | 2000-05-25 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20010625 |
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AK | Designated contracting states |
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RBV | Designated contracting states (corrected) |
Designated state(s): DE FR GB IT |
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17Q | First examination report despatched |
Effective date: 20061106 |
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17Q | First examination report despatched |
Effective date: 20061106 |
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GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20090421 |