EP1131865A1 - Electrically conductive sealing mass for sparking plugs - Google Patents

Electrically conductive sealing mass for sparking plugs

Info

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Withdrawn
Application number
EP99963235A
Other languages
German (de)
French (fr)
Inventor
Rudolf Pollner
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1131865A1 publication Critical patent/EP1131865A1/en
Withdrawn legal-status Critical Current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
    • H01T13/40—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.

Abstract

The invention relates to a sparking plug comprising a metallic housing (10), an isolator (11) which is accomodated in the housing (10) and a rod-shaped inner conductor arrangement which is arranged in said isolator (11). Said inner conductor arrangement is provided with a contact bolt (13), a current-limiting burn-off resistor (17) and a central electrode (14). A sealing mass (16) essentially contains at least one metallic component and at least one ceramic component with low thermal expansion, whereby the melting temperature of the metallic component is higher than the application temperature.

Description

Elektrisch leitende Dichtmasse für ZündkerzenElectrically conductive sealant for spark plugs
Stand der TechnikState of the art
Die Erfindung bezieht sich auf eine Zündkerze nach der Gattung des Hauptanspruchs. Dichtmassen dienen zum dichten Einschmelzen einer Mittelelektrode in einen Isolator der Zündkerze .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.
Eine Zündkerze der gattungsbildenden Art ist beispielsweise aus der DE-PS 22 45 403 bekannt, bei der die Dichtmasse zum dichten Fixieren der Mittelelektrode im Isolator aus einer Mischung aus einem Glas als schmelzbare Komponente und aus Graphit und/oder Ruß in Pulverform als elektrisch leitende Komponente besteht. Es ist darüber hinaus ebenfalls bekannt, als leitfähige pulverförmige Stoffe Kupfer oder Eisen einzusetzen. Beim Verschmelzen der Mischung im Isolator erweicht das Glas, wodurch ein Kontaktbolzen und eine Mittelelektrode in den Isolator mit einer Einschmelzung eingebettet wird. Die thermische Belastbarkeit der Einschmelzung ist jedoch begrenzt, da das Glas erst beiA 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. In addition, it is also known to use copper or iron as conductive powdery substances. When the mixture melts in the insulator, the glass softens, as a result of which a contact pin and a central electrode are embedded in the insulator with a fuse. The thermal resilience of the melt is limited, however, because the glass is only at
Temperaturen, die weit über der Transformationstemperatur liegen ausreichend niederviskos für die Einschmelzung ist, während die Anwendungsgrenze für die Einschmelzung durch die Transformationstemperatur des Glases begrenzt ist (Erweichung der Einschmelzung, Zersetzung der Einschmelzung durch Ionentransport im elektrischen Feld) .Temperatures that are far above the transformation temperature are sufficiently low-viscosity for the melting, while the application limit for the melting is limited by the transformation temperature of the glass (Softening of the meltdown, decomposition of the meltdown by ion transport in the electric field).
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Zündkerze mit den kennzeichnenden Merkmalen des Anspruchs 1 hat den Vorteil, daß die Dichtmasse eine höhere thermische Belastbarkeit aufweist. Die vorgeschlagene Metall-Keramik-Dichtmasse weist einen definierten Schmelzpunkt bzw. ein enges Schmelzintervall auf, wodurch die Dichtmasse bis knapp unterhalb der Schmelztemperatur des verwendeten Metalls beansprucht werden kann. Dadurch kann der Abstand zwischen der Temperatur der Einschmelzung und der Anwendungstemperatur deutlich verkleinert werden. Dies erlaubt außerdem einen Einsatz der Dichtmasse in der Nähe der Isolatorfußspitze. Dadurch ist der Einsatz der Dichtmasse für nageiförmige Platinelektroden möglich, die nur eine geringe axiale Ausdehnung an der Isolatorfußspitze aufweisen.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.
Durch die in den Unteransprüchen angegebenen Maßnahmen sind vorteilhafte Weiterbildungen der im Hauptanspruch angegebenen Zündkerze möglich. Eine besonders temperaturstabile Dichtmasse wird erzielt, wenn die metallische Komponente 20 bis 40 Volumen-% und die keramische Komponente 60 bis 80 Volumen-% beträgt.The measures specified in the subclaims allow advantageous developments of the spark plug specified in the main claim. 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.
Zeichnungdrawing
Drei Ausführungsbeispiele der Erfindung sind in derThree embodiments of the invention are in the
Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert . Es zeigen Figur 1 eine Zündkerze in Schnittdarstellung, Figur 2 das brennraumseitige Ende einer zweiten Ausführungsform der Zündkerze und Figur 3 das brennraumseitige Ende einer dritten Ausführungsform der Zündkerze .Drawing shown and explained in more detail in the following description. 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, and FIG. 3 shows the Combustion chamber end of a third embodiment of the spark plug.
Beschreibung der AusführungsbeispieleDescription of the embodiments
Die in Figur 1 dargestellte Zündkerze besteht aus einem in ein metallisches Gehäuse 10 gasdicht eingebördelten Isolator 11, wobei die rotationssymmetrischen Achsen des Gehäuses 10 und des Isolators 11 deckungsgleich liegen. Der Isolator 11 weist eine Isolatorbohrung 12 auf, in der eineThe 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
Innenleiteranordnung mit einem Kontaktbolzen 13, einem anschlußseitigen Kontaktpaket 15, einem Abbrandwiderstand 17, einer temperaturbeständigen Dichtmasse 16 und einer Mittelelektrode 14 angeordnet ist. Am Gehäuse 10 ist ferner eine Masseelektrode 18 ausgebildet. Die Mittelelektrode 14 und die Masselektrode 18 ragen in einen nicht dargestellten Brennraum hinein.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.
Die Dichtmasse 16 und das Kontaktpaket 15 haben die Aufgabe, den Abbrandwiderstand 17 gegen eindringenden Sauerstoff beim Einschmelzprozeß und beim Betrieb der Zündkerze abzudichten. Das Kontaktpaket 15 hat ferner die Aufgabe, den Kontaktbolzen 13 in der Isolatorbohrung 12 zu fixieren. Die gleiche Aufgabe besitzt neben der Dichtwirkung die Dichtmasse 16 bezüglich der Mittelelektrode 14. DieThe 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. In addition to the sealing effect, the sealing compound 16 has the same task with respect to the central electrode 14
Dichtmasse 16 ist aufgrund ihrer Nähe zum Brennraum einer wesentlich höheren thermischen Belastung ausgesetzt als das Kontaktpaket 15.Due to its proximity to the combustion chamber, sealing compound 16 is exposed to a substantially higher thermal load than the contact package 15.
Zur Gewährleistung der entsprechenden thermischenTo ensure the appropriate thermal
Belastbarkeit besteht die Dichtmasse im wesentlichen aus einer metallischen Komponente und einer keramischen Komponente. Die metallische Komponente besteht aus mindestens einem Metallpulver und/oder mindestens einem Pulver einer Metalllegierung wobei die Schmelztemperatur der metallischen Komponente oberhalb der Anwendungstemperatur der Zündkerze von beispielsweise 900°C liegt. Um die Belastung der Zündkerze beim Einschmelzen der Dichtmasse 16 nicht thermisch überzustrapazieren, ist es sinnvoll, wenn die Schmelztemperatur der metallischen Komponente unterhalb von 1000°C liegt. Als keramische Komponente eignet sich ein keramisches Pulver mit niedriger Wärmedehnung, wie beispielsweise Mullit, Sillimanit, AlN, Si3N4, Kieselglas oder ähnliche keramische Stoffe oder ein Gemisch dieser Stoffe.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.
Als eine geeignete Zusammensetzung der Dichtmasse 16, die mit einem thermischen Ausdehnungskoeffizienten von beispielsweise 8,4 * 10~6 K"1 an den thermischen Ausdehnungskoeffizienten des Isolators weitgehend angepaßt ist, hat sich eine Mischung aus 30 Volumen-% Zinn-Bronze- Pulver und 70 Volumen-% Mullit herausgestellt. Zur Verbesserung der Haftung der Metallphase an dem keramischen Füllstoff kann als metallische Komponente ein Aktivlot, z.B. AgTi-Lot verwendet werden.As a suitable composition of the sealing compound 16, which is largely adapted to the thermal expansion coefficient of the insulator with a coefficient of thermal expansion of, for example, 8.4 * 10 ~ 6 K "1 , a mixture of 30% by volume tin-bronze powder and 70% by volume of mullite In order to improve the adhesion of the metal phase to the ceramic filler, an active solder, for example AgTi solder, can be used as the metallic component.
Ein zweites Ausführungsbeispiel der Zündkerze geht aus Figur 2 hervor. Diese Ausführungsform verwendet eine nageiförmige Platinelektrode 21, die beispielsweise in den Isolator 11 eingesintert ist. Die Platinelektrode 21 wirkt beispielsweise mit 2 oder 4 Masselektroden 22 zusammen. Bei dieser Ausführungsform ist die Isolatorbohrung 12 stufenförmig ausgeführt. Von der Platinelelektrode 21 ausgehend sind hintereinander ein erster Bohrungsabschnitt 24, ein zweiter Bohrungsabschnitt 25 und ein dritterA 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. In this embodiment, 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
Bohrungsabschnitt 26 ausgeführt, wobei der Durchmesser des ersten BohrungsabSchnitts 24 kleiner ist als der Bohrungsdurchmesser des zweiten Bohrungsabschnitts 25 und der Durchmesser des dritten Bohrungsabschnitts 26 größer als der Durchmesser des zweiten Bohrungsabschnitts 25. Bei dem Ausführungsbeispiel gemäß Figur 2 ist im dritten Bohrungsabschnitt 26 der Kontaktbolzen 13 und das Kontaktpaket 15 angeordnet. An das Kontaktpaket 15 schließt sich brennraumseitig der Abbrandwiderstand 17 an, der sich im wesentlichen innerhalb des zweiten Bohrungsabschnitts 25 erstreckt. Zwischen Abbrandwiderstand 17 und Platinelektrode 21 befindet sich die Dichtmasse 16, die sich somit innerhalb des ersten BohrungsabSchnitts 24 befindet. Die Dichtmasse 16 weist dabei die unter dem ersten Ausführungsbeispiel beschriebene Zusammensetzung auf.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. In the 2 is arranged in the third bore section 26 of the contact pin 13 and 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.
Ein drittes Ausführungsbeispiel einer Zündkerze geht aus Figur 3 hervor, bei der im Unterschied zur Ausführungsform gemäß Figur 2 zwischen dem Abbrandwiderstand 17 und der Dichtmasse 16 ein weiteres elektrisch leitfähigesA 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
Kontaktpaket 28 angeordnet ist. Das Kontaktpaket 28 erstreckt sich dabei beispielsweise von dem zweiten Bohrungsabschnitt 25 bis in den dritten Bohrungsabschnitt 26 hinein. Es kann jedoch jede andere Position einnehmen, wobei lediglich zu gewährleisten ist, daß der Abbrandwiderstand 17 und die Dichtmasse 16 ihre Funktion beibehalten. Das weitere Kontaktpaket 28, dem brennraumseitig die Dichtmasse 17 vorgelagert ist, muß dabei nicht die hohe thermische Belastbarkeit der Dichtmasse 16 besitzen. Folglich kann das weitere Kontaktpaket 28 aus einer Zusammensetzung bestehen, die z. B. der Zusammensetzung des anschlußseitigen Kontaktpakets 15 entspricht. Derartige Zusammensetzungen sind beispielsweise ein Gemisch aus Glas und Graphit und/oder Ruß, wobei im Gemisch geringfügig Aluminiumpulver enthalten sein kann. 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.

Claims

Ansprüche Expectations
1. Zündkerze mit einem metallischen Gehäuse, einem in dem Gehäuse einπebetteten Isolator, in welchem eine stabförmige Innenleite; nordnung angeordnet ist, die einen Kontaktbolzen, einen strombegrenzenden Abbrandwiderstand und eine Mittelelektrode aufweist, wobei die Mittelelektrode im Isolator mittels einer temperaturbeständigen Dichtmasse abgedichtet ist, dadurch gekennzeichnet, daß die Dichtmasse (16) im wesentlichen mindestens eine metallische Komponente und mindestens eine keramische Komponente mit niedriger1. Spark plug with a metallic housing, an insulator embedded in the housing, in which a rod-shaped inner conductor; is arranged, which has a contact pin, a current-limiting erosion resistance and a central electrode, the central electrode in the insulator being sealed by means of a temperature-resistant sealing compound, characterized in that the sealing compound (16) essentially has at least one metallic component and at least one ceramic component with a lower level
Wärmedehnung enthält, wobei die metallischen Komponente eine Schmelztemperatur aufweist, die oberhalb der Anwendungstemperatur liegt.Contains thermal expansion, the metallic component having a melting temperature which is above the application temperature.
2. Zündkerze nach Anspruch 1, dadurch gekennzeichnet, daß die metallische Komponente mindestens ein Metall und/oder mindestens eine Metallegierung ist.2. Spark plug according to claim 1, characterized in that the metallic component is at least one metal and / or at least one metal alloy.
3. Zündkerze nach Anspruch 1, dadurch gekennzeichnet, daß als metallische Komponente Zinn-Bronze, ein Aktivlot oder ein Gemisch dieser Stoffe ist.3. Spark plug according to claim 1, characterized in that the metallic component is tin-bronze, an active solder or a mixture of these substances.
4. Zündkerze nach Anspruch 3, dadurch gekennzeichnet, daß das Aktivlot ein AgTi-Lot ist.4. Spark plug according to claim 3, characterized in that the active solder is an AgTi solder.
5. Zündkerze nach Anspruch 1, dadurch gekennzeichnet, daß die keramische Komponente Mullit, Sillimanit, A1N, Si3N4, Kieselglas oder ein Gemisch dieser Stoffe ist. 5. Spark plug according to claim 1, characterized in that the ceramic component is mullite, sillimanite, A1N, Si3N4, silica glass or a mixture of these substances.
6. Zündkerze nach Anspruch 1, dadurch gekennzeichnet, daß die metallische Komponente 20 bis 40 Volumen-% und die keramische Komponente 60 bis 80 Volumen-% beträgt.6. Spark plug according to claim 1, characterized in that the metallic component is 20 to 40% by volume and the ceramic component is 60 to 80% by volume.
7. Zündkerze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß über das7. Spark plug according to one of the preceding claims, characterized in that the
Zusammensetzungsverhältnis von metallischer Komponente und keramischer Komponente der thermische Ausdehnungskoeffizient der Dichtmasse (16) einstellbar ist. Composition ratio of metallic component and ceramic component, the coefficient of thermal expansion of the sealing compound (16) is adjustable.
EP99963235A 1998-11-23 1999-11-13 Electrically conductive sealing mass for sparking plugs Withdrawn EP1131865A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19853844A DE19853844A1 (en) 1998-11-23 1998-11-23 Spark plug has a temperature resistant, low thermal expansion sealant containing ceramic and metallic components
DE19853844 1998-11-23
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

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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)

* Cited by examiner, † Cited by third party
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
US8013502B2 (en) * 2007-05-17 2011-09-06 Federal-Mogul Corporation 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
RU186491U1 (en) * 2018-02-12 2019-01-22 Акционерное общество "Уфимское научно-производственное предприятие "Молния" GAS TURBINE ENGINE CANDLE
RU2678860C1 (en) * 2018-02-12 2019-02-04 Акционерное общество "Уфимское научно-производственное предприятие "Молния" Gas turbine engine spark plug
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)

* Cited by examiner, † Cited by third party
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0031843A1 *

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CN1328719A (en) 2001-12-26
RU2236735C2 (en) 2004-09-20
US6580202B1 (en) 2003-06-17
BR9915565A (en) 2002-01-08
WO2000031843A1 (en) 2000-06-02
DE19853844A1 (en) 2000-05-25
JP2002530842A (en) 2002-09-17

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