EP1005126A1 - Spark plug - Google Patents

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Publication number
EP1005126A1
EP1005126A1 EP99117056A EP99117056A EP1005126A1 EP 1005126 A1 EP1005126 A1 EP 1005126A1 EP 99117056 A EP99117056 A EP 99117056A EP 99117056 A EP99117056 A EP 99117056A EP 1005126 A1 EP1005126 A1 EP 1005126A1
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EP
European Patent Office
Prior art keywords
electrode
center electrode
composite material
doublé
precious metal
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Granted
Application number
EP99117056A
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German (de)
French (fr)
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EP1005126B1 (en
Inventor
Werner Niessner
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BorgWarner Ludwigsburg GmbH
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Beru AG
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    • 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
    • H01T13/39—Selection of materials for electrodes

Definitions

  • the invention relates to electrodes for high-voltage ignitions in various Applications, particularly in the ignition of internal combustion engines, as well as spark plugs with these electrodes.
  • Known center electrodes consist of a jacket made of nickel alloy and a core of copper metal. These center electrodes have a lifespan of designed around 60,000 km. If this lifetime is to be extended, the The center electrode on the ignition surface can be provided with precious metal, for example; the The central electrode can also be made of, for example, silver, silver-nickel fiber composite or the like.
  • the object of the invention is, bypassing the from the prior art known disadvantages of the technology to provide center electrodes that are high Have lifespan, but in which the precious metal content is much lower than at Is electrodes that are massively made of precious metal; the preferred Have diameters of 5 mm and less, in particular 2 mm and less; which are suitable for the mass production of spark plugs and their manufacture is simplified.
  • the object according to the invention is achieved by the electrodes according to the Claims 1 to 4 or solved by the spark plugs according to claims 5 to 8.
  • the electrodes according to the invention and those preferably made from them Spark plugs have significant advantages in terms of their manufacture and function compared to the prior art. For example, in a simple manner Side electrode concepts feasible; the previously difficult precious metal amamation of Electrodes are eliminated with the consequence of the simple manufacture of the invention Center electrodes; the weldability of the material combinations used according to the invention is simplified by, for example, the impact of nickel on nickel.
  • a center electrode which is made in one piece from a rod section or Sheathed wire with a sheath (2) made of precious metal such as platinum, a platinum alloy, Silver-Palladium u. ⁇ .and a good heat-conducting core (1) made of oxidation-resistant Material, such as nickel or nickel alloy.
  • the Diameter A of the electrode is preferably ⁇ 2 mm, preferably ⁇ 1.5 mm.
  • the central electrode body consists of a standard central electrode body with a diameter of 2.0 to 3 mm with nickel jacket (3) and Copper core (4).
  • the rod section-shaped composite material is on the ignition side of these grains welded from nickel jacket (5) and platinum core (6).
  • the sheathed wire section a much smaller diameter (about 1.0 mm) than that conventional center electrode body with a diameter of 2.0 to 3 mm.
  • FIG. 2a Another embodiment is shown in FIG. 2a; here is on the same known center electrode body in the front ignition area the sheathed wire section made of the composite material with the same Diameter dimensioning attached.
  • the sheathed wire consists of the Precious metal jacket (7), for example made of platinum or silver-palladium, during the Core (8) is formed from an oxidation-resistant, good heat-conducting material.
  • FIG. 3 Another embodiment of the invention is shown in FIG. 3.
  • a conventional nickel jacket / copper core center electrode body formed an enlarged diameter, here the known per se Center electrode body in the ignition-side area at least partially annular from the Composite material in the form of a doublé tube section is included; the coat (9) this doublé pipe section consists of precious metal and the inside (10) oxidation resistant material.
  • Fig. 4 shows a ground electrode in its design as a ring electrode that a doublé pipe section is made of the composite, the inner Layer of precious metal (11) and the outer jacket (12) made of oxidation resistant Material.
  • Fig. 5 shows in partial cross section the ignition-side area of a spark plug with side electrodes again.
  • the center electrode is designed according to FIG. 2a; the jacket (13) of the composite section-shaped material is here again made of precious metal.
  • the welding on the usual center electrode body does not cause any difficulties, especially if the core (13a) of the attachment the same material, for example nickel, as the adjacent material of the Center electrode body is made.
  • Fig. 6 gives a spark gap with a ring electrode made of doublé tube section with precious metal (14) as the inner area and oxidation-resistant material (15) as outer area.
  • the opposite center electrode is also on the ignition side a doublé pipe section according to FIG. 3; the outer surface (16) here made of precious metal.
  • the center electrode 8 shows a spark plug with a spark gap arrangement as a sliding / air spark gap.
  • the center electrode is preferably as in FIG Figure 2a described used.
  • the center electrode consists of the ignition end a sheathed wire section with a noble metal sheath, e.g. Platinum and has a core of oxidation-resistant, good heat-conducting core, e.g. Nickel.
  • the sheathed wire section is on a conventional center electrode, consisting of a jacket made of a Nickel alloy and a copper core applied.
  • the center electrode is on the ignition-side end is protected from wear by the burn-resistant precious metal jacket, so that long engine running times can be reliably achieved with this spark plug.
  • the Body electrode can be positioned below the insulator tip as shown in position 17 be positioned, or as shown in position 18 with the lower edge of the body electrode and the insulator tip are on the same level to prevent wear of the ceramic counteract.
  • Several 2, 3 or 4 side electrodes are conceivable, including one A combination of two pairs of electrodes of different heights is possible.

Abstract

Spark plug electrode comprises a composite rod or double-tube with a sheath of precious metal and a core or inner layer of non-precious metal or vice-versa. An Independent claim is also included for a spark plug in which at least one of the electrodes has the above design.

Description

Die Erfindung betrifft Elektroden für Hochspannungszündungen bei verschiedenen Anwendungen, insbesondere bei der Zündung von Verbrennungsmotoren, sowie Zündkerzen mit diesen Elektroden.The invention relates to electrodes for high-voltage ignitions in various Applications, particularly in the ignition of internal combustion engines, as well as spark plugs with these electrodes.

Bekannte Mittelelektroden bestehen aus einem Mantel aus Nickellegierung und einem Kern aus Kupfermetall. Diese Mittelelektroden sind auf eine Lebensdauer von etwa 60.000 km ausgelegt. Soll diese Lebenszeit verlängert werden, muß die Mittelelektrode an der Zündfläche beispielsweise mit Edelmetall versehen werden; die Mittelelektrode kann aber auch massiv aus beispielsweise Silber, Silber-Nickel-Faserverbund o. ä. ausgeführt sein.Known center electrodes consist of a jacket made of nickel alloy and a core of copper metal. These center electrodes have a lifespan of designed around 60,000 km. If this lifetime is to be extended, the The center electrode on the ignition surface can be provided with precious metal, for example; the The central electrode can also be made of, for example, silver, silver-nickel fiber composite or the like.

Bei Zündkerzen mit Seitenelektroden muß die Außenfläche der Mittelelektrode aus gleichen Gründen mit Edelmetall versehen werden; diese Edelmetallarmierungen erfordern einen hohen Fertigungsaufwand.In the case of spark plugs with side electrodes, the outer surface of the center electrode must be out be provided with precious metal for the same reasons; these precious metal reinforcements require a high manufacturing effort.

Hinzu kommt, daß bei Mittelelektroden mit Durchmessern von 2 mm und kleiner dieser Aufwand noch wesentlich höher ist, was wiederum einer wirtschaftlichen, insbesondere automatisierten Herstellung äußerst abträglich ist.In addition, that with center electrodes with diameters of 2 mm and smaller this effort is much higher, which in turn means an economic, automated manufacturing in particular is extremely detrimental.

Die Aufgabe der Erfindung besteht darin, unter Umgehung der aus dem Stand der Technik bekannten Nachteile Mittelelektroden zur Verfügung zu stellen, die hohe Lebensdauer aufweisen, aber bei denen der Edelmetallanteil wesentlich geringer als bei Elektroden ist, die massiv aus Edelmetall hergestellt werden; die vorzugsweise Durchmesser von 5 mm und weniger, insbesondere von 2 mm und weniger besitzen; die für die Massenproduktion von Zündkerzen geeignet sind und deren Herstellung vereinfacht ist.The object of the invention is, bypassing the from the prior art known disadvantages of the technology to provide center electrodes that are high Have lifespan, but in which the precious metal content is much lower than at Is electrodes that are massively made of precious metal; the preferred Have diameters of 5 mm and less, in particular 2 mm and less; which are suitable for the mass production of spark plugs and their manufacture is simplified.

Die erfindungsgemäße Aufgabe wird durch die Elektroden gemäß den Ansprüchen 1 bis 4 bzw. durch die Zündkerzen gemäß Ansprüchen 5 bis 8 gelöst.The object according to the invention is achieved by the electrodes according to the Claims 1 to 4 or solved by the spark plugs according to claims 5 to 8.

Die erfindungsgemäßen Elektroden und die vorzugsweise daraus gefertigten Zündkerzen weisen bezüglich ihrer Herstellung und Funktion erhebliche Vorteile gegenüber dem Stand der Technik auf. So werden beispielsweise in einfacher Weise Seitenelektroden-Konzepte realisierbar; die bisher schwierige Edelmetallamierung der Elektroden entfällt mit der Folge der einfachen Herstellung der erfindungsgemäßen Mittelelektroden; die Schweißbarkeit der erfindungsgemäß verwendeten Werkstoffkombinatiönen wird durch beispielsweises Auftreffen von Nickel auf Nickel vereinfacht.The electrodes according to the invention and those preferably made from them Spark plugs have significant advantages in terms of their manufacture and function compared to the prior art. For example, in a simple manner Side electrode concepts feasible; the previously difficult precious metal amamation of Electrodes are eliminated with the consequence of the simple manufacture of the invention Center electrodes; the weldability of the material combinations used according to the invention is simplified by, for example, the impact of nickel on nickel.

Neben der Einsparung von Edelmetallen im Verhältnis zu Massivelektroden tritt deutliche Steigerung der Lebensdauer der aus den erfindungsgemäßen Elektroden gefertigten Zündkerzen auf. Besonders vorteilhaft ist das erfindungsgemäße Konzept bei Herstellung und Einsatz von dünnen Mittelelektroden (Quenching) oder die Ausbildung von dicken Mittelelektroden durch die Verwendung von Edelmetall-Doublé-Rohrabschnitten, was der Vergrößerung der Abbrandfläche dient. Weitere Vorteile ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsformen.

  • Fig. 1 stellt im Querschnitt eine einstückige, aus einem stababschnittsförmigen oder manteldrahtabschnittsförmigen Verbundwerkstoff gefertigte Mittelelektrode dar;
  • Fig. 2 ist eine schematische Querschnittsdarstellung einer anderen Ausführungsform einer erfindungsgemäßen Mittelelektrode; gleiches gilt für die Figuren 2a und 3.
  • Fig. 4 ist die schematische Darstellung einer Ausführungsform einer Masseelektrode; die Figuren 5, 6 und 7 geben den zündseitigen Bereich verschiedener erfindungsgemäßer Zündkerzen in schematischer Darstellung wieder.
    • In addition to saving precious metals in relation to solid electrodes, there is a significant increase in the life of the spark plugs made from the electrodes according to the invention. The concept according to the invention is particularly advantageous in the production and use of thin center electrodes (quenching) or the formation of thick center electrodes through the use of noble metal doublé tube sections, which serves to enlarge the area of the erosion. Further advantages result from the following description of preferred embodiments.
  • 1 shows in cross section a one-piece center electrode made from a composite material which is in the form of a section of a bar section or a section of a sheathed wire section;
  • Fig. 2 is a schematic cross-sectional view of another embodiment of a center electrode according to the invention; the same applies to FIGS. 2a and 3.
  • 4 is a schematic representation of an embodiment of a ground electrode; Figures 5, 6 and 7 show the ignition-side area of various spark plugs according to the invention in a schematic representation.

    • Fig. 1 zeigt eine Mittelelektrode, die einstückig aus einem Stababschnitt bzw. Manteldraht mit einem Mantel (2) aus Edelmetall wie Platin, einer Platinlegierung, Silber- Palladium u. ä.und einem gut wärmeleitenden Kern (1) aus oxydationsbeständigen Werkstoff, beispielsweise Nickel oder Nickellegierung, besteht. Der Durchmesser A der Elektrode beträgt vorzugsweise < 2 mm vorzugsweise < 1,5 mm. Ein Vorteil besteht darin, daß die Mittelelektrode aus einem Manteldraht einfach durch Umformen herstellbar ist und sich mit bekannter Keramik-Metallverbindungstechnik mittels Glaseinschmelzverfahren montieren läßt.1 shows a center electrode which is made in one piece from a rod section or Sheathed wire with a sheath (2) made of precious metal such as platinum, a platinum alloy, Silver-Palladium u. Ä.and a good heat-conducting core (1) made of oxidation-resistant Material, such as nickel or nickel alloy. The Diameter A of the electrode is preferably <2 mm, preferably <1.5 mm. One advantage is that the center electrode is made of a sheathed wire Forming can be produced using known ceramic-metal connection technology can be installed using the glass melting process.

    In Fig. 2 besteht der Mittelelektrodenkörper aus einem serienmäßigen Mittelelektrodenkörper mit einem Durchmesser von 2,0 bis 3 mm mit Nickelmantel (3) und Kupferkern (4). An diesen Körner ist zündseitig der stababschnittsförmige Verbundwerkstoff aus Nickelmantel (5) und Platinkern (6) angeschweißt. Hierbei besitzt der Manteldrahtabschnitt einen wesentlich kleineren Durchmesser (etwa 1,0 mm) als der herkömmliche Mittelelektrodenkörper mit dem Durchmesser von 2,0 bis 3 mm.In Fig. 2, the central electrode body consists of a standard central electrode body with a diameter of 2.0 to 3 mm with nickel jacket (3) and Copper core (4). The rod section-shaped composite material is on the ignition side of these grains welded from nickel jacket (5) and platinum core (6). Here owns the sheathed wire section a much smaller diameter (about 1.0 mm) than that conventional center electrode body with a diameter of 2.0 to 3 mm.

    Eine weitere Ausführungsform ist in der Figur 2a wiedergegeben; hier ist an dem gleichen an sich bekannten Mittelelektrodenkörper im stirnseitigen Zündspitzenbereich der Manteldrahtabschnitt aus dem Verbundwerkstoff mit der gleichen Durchmesserdimensionierung angebracht. Hierbei besteht der Manteldraht aus dem Edelmetallmantel (7), beispielsweise aus Platin oder Silber-Palladium, während der Kern (8) aus einem oxydationsbeständigen, gut wärmeleitenden Werkstoff gebildet ist.Another embodiment is shown in FIG. 2a; here is on the same known center electrode body in the front ignition area the sheathed wire section made of the composite material with the same Diameter dimensioning attached. Here, the sheathed wire consists of the Precious metal jacket (7), for example made of platinum or silver-palladium, during the Core (8) is formed from an oxidation-resistant, good heat-conducting material.

    Eine andere erfindungsgemäße Ausführungsform stellt Fig. 3 dar. Hier ist der zündseitige Bereich eines üblichen Nickelmantel/Kuperkern-Mittelelektrodenkörpers mit einem vergrößerten Durchmesser ausgebildet, wobei hier der an sich bekannte Mittelelektrodenkörper im zündseitigen Bereich zumindest teilweise ringförmig von dem Verbundwerkstoff in Form eines Doublé-Rohrabschnitts umfaßt ist; der Mantel (9) dieses Doublé-Rohrabschnitts besteht aus Edelmetall und die Innenseite (10) aus oxydationsbeständigem Material. Auf diese Weise ist es möglich. Mittelelektroden im zündseitigen Bereich mit größeren Durchmessern, beispielsweise > 3 mm, in einfacher Weise herzustellen.Another embodiment of the invention is shown in FIG. 3. Here is the area on the ignition side of a conventional nickel jacket / copper core center electrode body formed an enlarged diameter, here the known per se Center electrode body in the ignition-side area at least partially annular from the Composite material in the form of a doublé tube section is included; the coat (9) this doublé pipe section consists of precious metal and the inside (10) oxidation resistant material. This way it is possible. Center electrodes in the area on the ignition side with larger diameters, for example> 3 mm, in simpler Way to manufacture.

    Fig. 4 zeigt eine Masseelektrode in ihrer Ausführung als Ringelektrode, die aus einem Doublé-Rohrabschnitt aus dem Verbundwerkstoff hergestellt ist, wobei die innere Schicht aus Edelmetall (11) und der Außenmantel (12) aus oxydationsbesrändigem Material bestehen.Fig. 4 shows a ground electrode in its design as a ring electrode that a doublé pipe section is made of the composite, the inner Layer of precious metal (11) and the outer jacket (12) made of oxidation resistant Material.

    Fig. 5 gibt im teilweisen Querschnitt den zündseitigen Bereich einer Zündkerze mit Seitenelektroden wieder. Hierbei ist die Mittelelektrode gemäß Fig. 2a ausgebildet; der Mantel (13) des stababschnittsförmig ausgebildeten Verbundwerkstoffs besteht hier wiederum aus Edelmetall. Die Verschweißung auf dem üblichen Mittelelektrodenkörper bereitet keinerlei Schwierigkeiten, insbesondere wenn der Kern (13a) des Aufsatzes aus dem gleichen Material, beispielsweise Nickel, wie das anliegende Material des Mittelelektrodenkörpers besteht.Fig. 5 shows in partial cross section the ignition-side area of a spark plug with side electrodes again. Here, the center electrode is designed according to FIG. 2a; the jacket (13) of the composite section-shaped material is here again made of precious metal. The welding on the usual center electrode body does not cause any difficulties, especially if the core (13a) of the attachment the same material, for example nickel, as the adjacent material of the Center electrode body is made.

    Fig. 6 gibt eine Funkenstrecke mit einer Ringelektrode aus Doublé-Rohrabschnitt mit Edelmetall (14) als innerem Bereich und oxydationsbeständigem Werkstoff (15) als äußerem Bereich. Die gegenüberliegende Mittelelektrode ist zündseitig ebenfalls mit einem Doublé-Rohrabschnitt gemäß Fig. 3 versehen; die Mantelfläche (16) besteht hierbei aus Edelmetall.Fig. 6 gives a spark gap with a ring electrode made of doublé tube section with precious metal (14) as the inner area and oxidation-resistant material (15) as outer area. The opposite center electrode is also on the ignition side a doublé pipe section according to FIG. 3; the outer surface (16) here made of precious metal.

    Schließlich wird in Fig. 7 eine besonders bevorzugte Ausführungsform einer Zündkerze mit einer besonders dünnen Mittelelektrode aus dem stababschnittsförmigen Verbundwerkstoff mit einem Durchmesser A von < 1,2 mm wiedergegeben, die einstückig ausgebildet in dem Isolatorglas eingeschmolzen ist.Finally, a particularly preferred embodiment of a Spark plug with a particularly thin center electrode made from the rod section Composite material with a diameter A of <1.2 mm reproduced, the is integrally formed in the insulator glass is melted.

    Fig. 8 zeigt eine Zündkerze mit einer Funkenstreckenanordnung als Gleit/-Luftfunkenstrecke. In dieser Anordnung ist vorzugsweise die Mittelelektrode wie in Figur 2a beschrieben eingesetzt. Die Mittelelektrode besteht am zündseitigen Ende aus einem Manteldrahtabschnitt mit Edelmetallmantel, z.B. Platin und hat einen Kern aus oxidationsbeständigen, gut wärmeleitenden Kern, z.B. Nickel. Der Manteldrahtabschnitt ist auf eine konventionelle Mittelelektrode, bestehend aus einem Mantel aus einer Nickellegierung und einem Kupferkern aufgebracht. Die Mittelelektrode wird am zündseitigen Ende durch den abbrandfesten Edelmetallmantel vor Verschleiß geschützt, so daß mit dieser Zündkerze hohe Motorlaufzeiten sicher erreicht werden. Die Körperelektrode kann wie in Position 17 dargestellt unterhalb der Isolatorfußspitze positioniert sein, oder wie in Position 18 dargestellt mit der Unterkante der Körperelektrode und der Isolatorfußspitze auf gleicher Ebene liegen, um Verschleiß der Keramik entgegenzuwirken. Es sind mehrere 2, 3 oder 4 Seitenelektroden denkbar, auch eine Kombination zweier Elektrodenpaare unterschiedlicher Höhe ist realisierbar.8 shows a spark plug with a spark gap arrangement as a sliding / air spark gap. In this arrangement, the center electrode is preferably as in FIG Figure 2a described used. The center electrode consists of the ignition end a sheathed wire section with a noble metal sheath, e.g. Platinum and has a core of oxidation-resistant, good heat-conducting core, e.g. Nickel. The sheathed wire section is on a conventional center electrode, consisting of a jacket made of a Nickel alloy and a copper core applied. The center electrode is on the ignition-side end is protected from wear by the burn-resistant precious metal jacket, so that long engine running times can be reliably achieved with this spark plug. The Body electrode can be positioned below the insulator tip as shown in position 17 be positioned, or as shown in position 18 with the lower edge of the body electrode and the insulator tip are on the same level to prevent wear of the ceramic counteract. Several 2, 3 or 4 side electrodes are conceivable, including one A combination of two pairs of electrodes of different heights is possible.

    Claims (8)

    Elektroden für Zündsysteme, insbesondere für Zündkerzen, die zumindest teilweise aus einem Verbundwerkstoff in stababschnittsförmiger oder doublé-rohrabschnittsförmiger Ausbildung hergestellt sind, wobei der Mantel aus Edelmetall und der Kern bei stababschnittsförmiger Ausbildung bzw. die innere Schicht bei doublé-rohrabschnittsförmiger Ausbildung aus unedlem Metall oder der Mantel aus unedlem Metall und der Kern/die innere Schicht aus Edelmetall bestehen.Electrodes for ignition systems, especially for spark plugs, at least partly made of a composite material in the form of rod sections or doublé pipes Training are made, the coat of precious metal and the core in the case of a rod section-shaped design or the inner layer in the case of a doublé-pipe section shaped Training from base metal or the coat from base Metal and the core / inner layer are made of precious metal. Elektrode nach Anspruch 1, ausgebildet als Mittelelektrode mit Durchmessern von 0,5 mm bis 2 mm, wobei die Mittelelektrode einstückig aus dem stababschnittsförmigen Verbundwerkstoff ausgebildet ist, oder wobei der stababschnittsförmige Verbundwerkstoff stirnseitig an einer Kupferkernmittelelektrode angeordnet (Fig. 2, 2a).Electrode according to claim 1, formed as a central electrode with diameters from 0.5 mm to 2 mm, the center electrode being made in one piece from the rod section Composite material is formed, or wherein the rod section Composite material arranged on the end face of a copper core center electrode (FIG. 2, 2a). Elektrode nach Anspruch 1, ausgebildet als Mittelelektrode, deren zündseitiger Elektrodendurchmesser größer als der Durchmesser des Mittelelektrodenkörpers ist, wobei der Verbundwerkstoff in Form eines Doublé-Rohrabschnitts den zündseitigen Endbereich des Mittelelektrodenkörpers zumindest teilweise ringförmig umfaßt (Fig. 3).Electrode according to claim 1, formed as a central electrode, the ignition side Electrode diameter is larger than the diameter of the central electrode body, the composite material in the form of a doublé pipe section the ignition side End region of the center electrode body at least partially encircled (Fig. 3). Elektrode nach Anspruch 1, ausgebildet als Masseelektrode in Form einer Ringelektrode, die aus dem Verbundwerkstoff in Form eines Doublé-Rohrabschnitts gebildet ist (Fig.4).Electrode according to claim 1, formed as a ground electrode in the form of a Ring electrode made of the composite material in the form of a doublé tube section is formed (Fig.4). Zündkerze mit zumindest einer der Elektroden nach einem der Ansprüche 1 bis 4.Spark plug with at least one of the electrodes according to one of Claims 1 to 4. Zündkerze nach Anspruch 5 mit einer Mittelelektrode, deren zündseitiger Elektrodendurchmesser größer als der des Mittelelektrodenkörpers ist, bei der der Verbundstoff in Form eines Doublé-Rohrabschnitts den zündseitigen Endbereich des Mittelelektrodenkörpers zumindest teilweise ringförmig umfaßt, wobei der Mantel (16) aus Edelmetall besteht, wobei diese Mittelelektrode von einer Ringelektrode umgeben ist, die aus einem Doublé-Rohrabschnitt ausgebildet ist, dessen innerer Bereich (14) aus Edelmetall, dessen äußerer Bereich (15) aus oxydationsbeständigem Werkstoff gebildet ist (Fig. 6).Spark plug according to claim 5 with a center electrode, the ignition side Electrode diameter is larger than that of the center electrode body, in which the Composite in the form of a doublé tube section the ignition-side end area of the Center electrode body at least partially ring-shaped, wherein the jacket (16) consists of precious metal, this center electrode being surrounded by a ring electrode , which is formed from a doublé tube section, the inner region (14) Precious metal, the outer area (15) formed of oxidation-resistant material is (Fig. 6). Zündkerze nach Anspruch 5 mit Seitenelektroden, wobei der Mittelelektrodenkörper aus an sich bekanntem Nickelmantel und Kupferkern besteht, wobei an den Körper zündseitig ein Stababschnitt des Verbundwerkstoffs durch Schweißen aufgebracht ist, und wobei der Mantel (13) aus Edelmetall und der Kern (13a) aus dem gleichen Material, beispielsweise Nickel, wie das anliegende Material des Mittelelektrodenkörpers besteht (Fig. 5).A spark plug according to claim 5, having side electrodes, wherein the center electrode body consists of a known nickel jacket and copper core, whereby at the body on the ignition side a rod section of the composite material by welding is applied, and wherein the jacket (13) made of precious metal and the core (13a) made of same material, for example nickel, as the adjacent material of the center electrode body consists (Fig. 5). Zündkerze nach Anspruch 5, bei der die Mittelelektrode einen Mittelelektrodendurchmesser von = oder < 1,2 mm aufweist, wobei der Verbundwerkstoff in Form eines Stababschnitts dieses Durchmessers ausgebildet und in dem Isolatorglas eingeschmolzen ist (Fig. 7).A spark plug according to claim 5, wherein the center electrode has a center electrode diameter of = or <1.2 mm, the composite material in Form a rod section of this diameter and in the insulator glass is melted (Fig. 7).
    EP99117056A 1998-11-27 1999-08-30 Spark plug Expired - Lifetime EP1005126B1 (en)

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    DE19854861 1998-11-27
    DE19854861A DE19854861A1 (en) 1998-11-27 1998-11-27 spark plug

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    EP1005126A1 true EP1005126A1 (en) 2000-05-31
    EP1005126B1 EP1005126B1 (en) 2004-08-11

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    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
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    US9948069B2 (en) 2013-12-20 2018-04-17 Ngk Spark Plug Co., Ltd. Spark plug
    WO2018169533A1 (en) * 2017-03-15 2018-09-20 Federal-Mogul Llc Ignition coil wires

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    US9948069B2 (en) 2013-12-20 2018-04-17 Ngk Spark Plug Co., Ltd. Spark plug
    WO2018169533A1 (en) * 2017-03-15 2018-09-20 Federal-Mogul Llc Ignition coil wires
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    Also Published As

    Publication number Publication date
    ES2222642T3 (en) 2005-02-01
    DE19854861A1 (en) 2000-05-31
    DE59910188D1 (en) 2004-09-16
    ATE273579T1 (en) 2004-08-15
    EP1005126B1 (en) 2004-08-11

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