EP0858139A1 - Sparking plug - Google Patents

Sparking plug Download PDF

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Publication number
EP0858139A1
EP0858139A1 EP98101912A EP98101912A EP0858139A1 EP 0858139 A1 EP0858139 A1 EP 0858139A1 EP 98101912 A EP98101912 A EP 98101912A EP 98101912 A EP98101912 A EP 98101912A EP 0858139 A1 EP0858139 A1 EP 0858139A1
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EP
European Patent Office
Prior art keywords
spark plug
spark
insulator
electrode
plug according
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Granted
Application number
EP98101912A
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German (de)
French (fr)
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EP0858139B1 (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
    • H01T13/52—Sparking plugs characterised by a discharge along a surface
    • 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
    • H01T13/46—Sparking plugs having two or more spark gaps
    • H01T13/467—Sparking plugs having two or more spark gaps in parallel connection

Definitions

  • the invention relates to a spark plug for an internal combustion engine with a spark plug body made of an electrically conductive Material, an electrical insulator that is centered in the Spark plug body is arranged, a central electrode, which in an insulator hole is arranged in the insulator and from the Insulator tip protrudes and laterally to the center electrode employed ground electrodes that are electrically connected to the spark plug body are connected.
  • Spark plugs where different spark paths are provided are from DE 195 032 23 A1 and DE-OS 2 106 893 known.
  • the object underlying the invention is in contrast in the spark plug of the type mentioned above train that they have a long life without harming the Isolator ceramic e.g. through the so-called spark saw.
  • At least one of the ground electrodes is arranged so that its bottom edge facing the insulator with the end face of the insulator tip lies in one plane.
  • Spark plug comprises a spark plug body 1 from a electrically conductive material, an electrical insulator 2 a ceramic material that is centered in the spark plug body 1 is arranged, a center electrode 3, which is in an insulator bore is arranged in the insulator 2 and from the insulator tip protrudes, and employed laterally to the center electrode 3 Ground electrodes 4, 5, which are electrically connected to the spark plug body 1 are connected.
  • the ground electrodes are 4, 5 arranged in pairs diametrically opposite one another.
  • ground electrodes 4, 5 are such that different spark paths, namely a pure air spark path FS1, a combined sliding spark and air spark path FS2 and another combined sliding / air spark path FS3 surrender.
  • the other ground electrode 4 is opposite the center electrode 3 is formed so that the other combined sliding / air spark travel path FS3 results.
  • At least one ground electrode each which forms a pure air spark path or an air spark and parallel sliding spark path, as well as with at least one ground electrode that has a combined sliding / air spark path forms.
  • the training can also be such that there is a spark path in addition to the pure air spark path FS1 FS2 forms a parallel combined glide / air spark travel path is.
  • the gap ratios between the spark paths FS1 and FS2 are then preferably EA1: EA2 equal to 3: 2, as in Fig. 3 is shown.
  • the electrode distances EA1, EA2, EA3 between the ground electrode 5 and the center electrode 3, between the lower edge the ground electrode 5 and the insulator tip and between the ground electrode 4 and the center electrode 3 preferably in a ratio of 3: 2: 6.
  • the electrode spacing EA3 can be divided according to FIG. 3 into a sliding spark gap EA3.1 and into an air spark gap EA3.2, preferably in a ratio of 1: 1 to each other stand.
  • a recess 6 is formed, which is ring-shaped around the center electrode 3 runs.
  • This recess 6 runs obliquely to Angular axis of the center electrode 3 at a half angle ⁇ Countersink 6, starting from the angular axis, which is between 15 ° and 45 ° in particular between 25 ° and 35 ° and preferably at 30 °.
  • the dimensions of the countersink 6 are in particular the following: Gap dimension a between the countersink 6 and the outer surface the center electrode 3: 0.2 to 1.0 mm, preferably 0.4 to 0.6 mm, in particular the following applies: a ⁇ 0.5 * EA 3.1.
  • the isolator foot tip is free of electrical power at full load conductive coatings and soot deposits.
  • the spark formation will therefore develop as a pure air spark path FS1.
  • Such a spark discharge takes place via this spark path FS1 takes place until the burnup potential at the Air spark path between the center electrode 3 and the ground electrode 5 is used up, and the voltage requirement for the Formation of a spark on this spark path higher than that The voltage requirement of the other spark paths FS2 or FS3 is.
  • the spark path FS3 offers special advantages during a cold start through the serial arrangement of the center electrode 3 and the ground electrode 4. The long spark path ensures the spark path FS3 also ensures a safe ignition of the mixture It is ensured that the internal combustion engine even with inhomogeneous mixtures runs smoothly.

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Abstract

The spark plug has a cylindrical main body Ä1Ü of electrically conducting material with a central insulator Ä2Ü into which is set a central electrode Ä3Ü. Projecting from the main body are earth electrodes Ä4,5Ü that are set at different levels. These result in different arcing paths ÄFS1-3Ü being established between the electrodes.

Description

Die Erfindung betrifft eine Zündkerze für eine Brennkraftmaschine mit einem Zündkerzenkörper aus einem elektrisch leitenden Material, einem elektrischen Isolator, der zentrisch im Zünkerzenkörper angeordnet ist, einer Mittelelektrode, die in einer Isolatorbohrung im Isolator angeordnet ist und von der Isolatorfußspitze vorsteht, und seitlich zur Mittelelektrode angestellten Massenelektroden, die elektrisch mit dem Zündkerzenkörper verbunden sind.The invention relates to a spark plug for an internal combustion engine with a spark plug body made of an electrically conductive Material, an electrical insulator that is centered in the Spark plug body is arranged, a central electrode, which in an insulator hole is arranged in the insulator and from the Insulator tip protrudes and laterally to the center electrode employed ground electrodes that are electrically connected to the spark plug body are connected.

Aus der EP 0 470 688 B1 ist es bekannt, bei einer derartigen Zündkerze die Elektroden so auszubilden, daß sich zwei Funkenlaufwege nämlich ein Luftfunkenlaufweg und ein paralleler Gleitfunkenlaufweg ergeben. Der eine Funkenlaufweg besteht zwischen der Mittelelektrode und den Masseelektroden als reiner Luftfunkenlaufweg und der andere Funkenlaufweg wird durch eine gezielte geometrische Abstimmung der Masseelektroden zur Isolatorfußspitze gebildet derart, daß sich der Funke über die Keramik des Isolatorfußes als Gleitfunke und anschließend als Luftfunke zur Unterkante der Masseelektroden ausbildet.It is known from EP 0 470 688 B1 for such a Spark plug to form the electrodes so that there are two spark paths namely an air spark path and a parallel one Slip spark travel result. The one spark path exists between the center electrode and the ground electrodes as pure Air spark path and the other spark path is through one targeted geometric coordination of the ground electrodes to the insulator tip formed such that the spark over the ceramic of the insulator foot as gliding spark and then as air spark to the lower edge of the ground electrodes.

Zündkerzen, bei denen verschiedene Funkenlaufwege vorgesehen sind, sind weiterhin aus der DE 195 032 23 A1 und der DE-OS 2 106 893 bekannt.Spark plugs where different spark paths are provided are from DE 195 032 23 A1 and DE-OS 2 106 893 known.

Die der Erfindung zugrunde liegende Aufgabe besteht demgegenüber darin, die Zündkerze der eingangs genannten Art so auszubilden, daß sie eine hohe Laufzeit ohne Schädigung der Isolatorkeramik z.B. durch das sogenannte Funkensägen, hat.The object underlying the invention is in contrast in the spark plug of the type mentioned above train that they have a long life without harming the Isolator ceramic e.g. through the so-called spark saw.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß wenigstens eine der Masseelektroden so angeordnet ist, daß ihre dem Isolator zugewandte Unterkante mit der Stirnfläche der Isolatorfußspitze in einer Ebene liegt.This object is achieved according to the invention in that at least one of the ground electrodes is arranged so that its bottom edge facing the insulator with the end face of the insulator tip lies in one plane.

Besonders bevorzugte Ausbildungen der erfindungsgemäßen Zündkerze sind Gegenstand der Patentansprüche 2 bis 9.Particularly preferred embodiments of the invention Spark plugs are the subject of claims 2 to 9.

Im folgenden wird anhand der zugehörigen Zeichnung ein besonders bevorzugtes Ausführungsbeispiel der Erfindung näher beschrieben. Es zeigen

  • Fig. 1 in einer Teilschnittansicht die Elektrodenanordnung bei dem Ausführungsbeispiel der erfindungsgemäßen Zündkerze,
  • Fig. 2 eine Draufsicht auf die Elektrodenanordnung der in Fig. 1 dargestellten Zündkerze,
  • Fig. 3 eine axiale Teilschnittansicht des Ausführungsbeispiels der erfindungsgemäßen Zündkerze mit den Elektrodenabständen und
  • Fig. 4 in einer Schnittansicht die Anordnung einer Masseelektrode gegenüber der Isolatorfußspitze bei dem in Fig. 3 dargestellten Ausführungsbeispiel in vergrößertem Maßstab.
    • A particularly preferred exemplary embodiment of the invention is described in more detail below with reference to the accompanying drawing. Show it
  • 1 is a partial sectional view of the electrode arrangement in the embodiment of the spark plug according to the invention,
  • 2 is a plan view of the electrode arrangement of the spark plug shown in FIG. 1,
  • Fig. 3 is an axial partial sectional view of the embodiment of the spark plug according to the invention with the electrode spacings and
  • Fig. 4 is a sectional view of the arrangement of a ground electrode opposite the insulator tip in the embodiment shown in Fig. 3 on an enlarged scale.

    • Das in Fig. 1 dargestellte Ausführungsbeispiel der erfindungsgemäßen Zündkerze umfaßt einen Zündkerzenkörper 1 aus einem elektrisch leitenden Material, einen elektrischen Isolator 2 aus einem keramischen Material, der zentrisch im Zündkerzenkörper 1 angeordnet ist, eine Mittelelektrode 3, die in einer Isolatorbohrung im Isolator 2 angeordnet ist und von der Isolatorfußspitze vorsteht, und seitlich zur Mittelelektrode 3 angestellte Masseelektroden 4, 5, die elektrisch mit dem Zündkerzenkörper 1 verbunden sind.The embodiment shown in Fig. 1 of the invention Spark plug comprises a spark plug body 1 from a electrically conductive material, an electrical insulator 2 a ceramic material that is centered in the spark plug body 1 is arranged, a center electrode 3, which is in an insulator bore is arranged in the insulator 2 and from the insulator tip protrudes, and employed laterally to the center electrode 3 Ground electrodes 4, 5, which are electrically connected to the spark plug body 1 are connected.

    Wie es in Fig. 2 dargestellt ist, sind die Masseelektroden 4, 5 paarweise einander diametral gegenüber stehend angeordnet.As shown in Fig. 2, the ground electrodes are 4, 5 arranged in pairs diametrically opposite one another.

    Die Ausbildung der Masseelektroden 4, 5 ist derart, daß sich verschieden Funkenlaufwege nämlich ein reiner Luftfunkenlaufweg FS1, ein kombinerter Gleitfunken- und Luftfunkenlaufweg FS2 und ein weiterer kombinierter Gleit/Luftfunkenlaufweg FS3 ergeben.The formation of the ground electrodes 4, 5 is such that different spark paths, namely a pure air spark path FS1, a combined sliding spark and air spark path FS2 and another combined sliding / air spark path FS3 surrender.

    Das heißt im einzelnen, daß der reine Luftfunkenlaufweg FS1 sowie der kombinierte Gleitfunken/Luftfunkenlaufweg FS2 zwischen der Mittelelektrode 3 und der als Seitenelektrode ausgebildeten Masseelektrode 5 bestehen. Die andere Masseelektrode 4 ist gegenüber der Mittelelektrode 3 so ausgebildet, daß sich der weitere kombinierte Gleit/Luftfunkenlaufweg FS3 ergibt.Specifically, this means that the pure air spark travel FS1 as well as the combined sliding spark / air spark travel path FS2 between the center electrode 3 and the side electrode Ground electrode 5 exist. The other ground electrode 4 is opposite the center electrode 3 is formed so that the other combined sliding / air spark travel path FS3 results.

    Es sind Kombinationen möglich mit mindestens je einer Masseelektrode, die einen reinen Luftfunkenlaufweg oder einen Luftfunken- und parallelen Gleitfunkenlaufweg bildet, sowie mit mindestens einer Masseelektrode, die einen kombinierten Gleit/Luftfunkenlaufweg bildet.Combinations are possible with at least one ground electrode each, which forms a pure air spark path or an air spark and parallel sliding spark path, as well as with at least one ground electrode that has a combined sliding / air spark path forms.

    Damit sich an der Masseelektrode 5 ein reiner Luftfunkenlaufweg bildet, muß in der in Fig. 3 dargestellten Weise der Spalt EA2 zwischen der Unterkante der Masseelektrode 5 und der Isolatorfußspitze mindestens die doppelte Distanz des Luftfunkenlaufweges FS1 haben, damit der Funken nicht über die Isolatorfußspitze geht. Die Ausbildung kann aber auch derart sein, daß sich neben dem reinen Luftfunkenlaufweg FS1 ein Funkenlaufweg FS2 bildet, der ein paralleler kombinierter Gleit/Luftfunkenlaufweg ist. Dazu ist der Spalt EA2 zwischen der Isolatorfußspitze und der Unterkante der Masseelektrode 5 entsprechend zu wählen. Die Spaltverhältnisse zwischen den Funkenlaufwegen FS1 und FS2 sind dann vorzugsweise EA1:EA2 gleich 3:2, wie es in Fig. 3 dargestellt ist. Das bedeutet, daß bei einem Elektrodenabstand EA1 zwischen der Mittelelektrode 3 und der Masseelektrode 5 von 0,80mm der Spalt EA2 zwischen der Unterkante der Masseelektrode 5 und der Isolatorfußspitze etwa 0,50mm beträgt. Eine der Masseelektroden nämlich die Masseelektrode 4 ist so ausgebildet, daß in der in einer vergrößerten Ansicht in Fig. 4 dargestellten Weise ihre dem Isolator 2 zugewandte Unterkante mit der Stirnfläche der Isolatorfußspitze in einer Ebene liegt. Durch diese Ausbildung ergibt sich ein weiterer Funkenlaufweg FS3 in Form eines kombinierten Gleit/Luftfunkenlaufweges (siehe Fig. 1).So that there is a pure air spark path at the ground electrode 5 forms, must in the manner shown in Fig. 3 Gap EA2 between the lower edge of the ground electrode 5 and the Insulator toe at least twice the distance of the air spark travel FS1 so that the spark does not reach the tip of the insulator goes. The training can also be such that there is a spark path in addition to the pure air spark path FS1 FS2 forms a parallel combined glide / air spark travel path is. There is a gap EA2 between the tip of the insulator and the lower edge of the ground electrode 5 accordingly choose. The gap ratios between the spark paths FS1 and FS2 are then preferably EA1: EA2 equal to 3: 2, as in Fig. 3 is shown. This means that at an electrode gap EA1 between the center electrode 3 and the ground electrode 5 by 0.80mm the gap EA2 between the lower edge of the Ground electrode 5 and the insulator tip is about 0.50mm. One of the ground electrodes, namely the ground electrode 4, is so formed that in an enlarged view in Fig. 4th shown way their lower edge facing the insulator 2 lies in one plane with the end face of the insulator tip. This training results in a further spark path FS3 in the form of a combined sliding / air spark path (see Fig. 1).

    Wie es in Fig. 3 dargestellt ist, stehen bei dieser Ausbildung die Elektrodenabstände EA1, EA2, EA3 zwischen der Masseelektrode 5 und der Mittelelektrode 3, zwischen der Unterkante der Masseelektrode 5 und der Isolatorfußspitze sowie zwischen der Masseelektrode 4 und der Mittelelektrode 3 vorzugsweise in einem Verhältnis 3:2:6.As shown in Fig. 3, are in this training the electrode distances EA1, EA2, EA3 between the ground electrode 5 and the center electrode 3, between the lower edge the ground electrode 5 and the insulator tip and between the ground electrode 4 and the center electrode 3 preferably in a ratio of 3: 2: 6.

    Der Elektrodenabstand EA3 läßt sich gemäß Fig. 3 aufteilen in einen Gleitfunkenstrecke EA3.1 und in eine Luftfunkenstrecke EA3.2, die vorzugsweise in einem Verhältnis von 1:1 zueinander stehen.The electrode spacing EA3 can be divided according to FIG. 3 into a sliding spark gap EA3.1 and into an air spark gap EA3.2, preferably in a ratio of 1: 1 to each other stand.

    Bei einem Elektrodenabstand EA1 und EA2 von 0,80mm und 0,50mm ergibt sich für den Elektrodenabstand EA3 ein Wert von 1,60mm.With an electrode spacing EA1 and EA2 of 0.80mm and A value of 0.50mm results for the electrode spacing EA3 1.60mm.

    Wie es weiterhin in den Figuren 3 und 4 dargestellt ist, ist die Isolatorbohrung im Bereich der Isolatorfußspitze mit einer Versenkung 6 ausgebildet, die ringförmig um die Mittelelektrode 3 verläuft. Diese Versenkung 6 verläuft schräg zur Winkelachse der Mittelelektrode 3 unter einem Halbwinkel α der Versenkung 6, ausgehend von der Winkelachse, der zwischen 15° und 45° insbesondere zwischen 25° und 35° und vorzugsweise bei 30° liegt.As further shown in FIGS. 3 and 4, is the insulator hole in the area of the insulator tip a recess 6 is formed, which is ring-shaped around the center electrode 3 runs. This recess 6 runs obliquely to Angular axis of the center electrode 3 at a half angle α Countersink 6, starting from the angular axis, which is between 15 ° and 45 ° in particular between 25 ° and 35 ° and preferably at 30 °.

    Die Abmessungen der Versenkung 6 sind insbesondere die folgenden: Spaltmaß a zwischen der Versenkung 6 und der Außenfläche der Mittelelektrode 3: 0,2 bis 1,0 mm, vorzugsweise 0,4 bis 0,6 mm, wobei insbesondere gilt: a ≤ 0,5 * EA 3.1. The dimensions of the countersink 6 are in particular the following: Gap dimension a between the countersink 6 and the outer surface the center electrode 3: 0.2 to 1.0 mm, preferably 0.4 to 0.6 mm, in particular the following applies: a ≤ 0.5 * EA 3.1.

    Durch die Ausbildung der Isolatorbohrung mit Versenkung 6 ergibt sich eine Erhöhung des Abbrandreservois um den Betrag der Tiefe der Versenkung 6.By forming the insulator hole with countersink 6 there is an increase in the burnup reserve by the amount of Countersink depth 6.

    Im folgenden wird die Arbeitsweise einer Zündkerze mit dem oben beschriebenen Aufbau im Betrieb der Brennkraftmaschine näher erläutert.The following is how a spark plug works with the Construction described above in the operation of the internal combustion engine explained in more detail.

    Bei Vollastbetrieb ist die Isolatorfußspitze frei von elektrisch leitenden Belägen und Rußablagerungen. Die Funkenausbildung wird sich demnach als reiner Luftfunkenlaufweg FS1 ausbilden. Eine derartige Funkenentladung findet über diesen Funkenlaufweg FS1 so lange statt, bis das Abbrandpotential an dem Luftfunkenlaufweg zwischen der Mittelelektrode 3 und der Masseelektrode 5 aufgebraucht ist, und der Spannungsbedarf für die Ausbildung eines Funkens an diesem Funkenlaufweg höher als der Spannungsbedarf der anderen Funkenlaufwege FS2 oder FS3 ist.The isolator foot tip is free of electrical power at full load conductive coatings and soot deposits. The spark formation will therefore develop as a pure air spark path FS1. Such a spark discharge takes place via this spark path FS1 takes place until the burnup potential at the Air spark path between the center electrode 3 and the ground electrode 5 is used up, and the voltage requirement for the Formation of a spark on this spark path higher than that The voltage requirement of the other spark paths FS2 or FS3 is.

    Nachdem die Abbrandreserve am Funkenlaufweg FS1 durch Heißgaskorrosion und Funkenerrosion aufgebraucht ist, wechselt der Funkenlaufweg auf den Funkenlaufweg FS2 oder FS3 und zwar jeweils auf den Funkenlaufweg mit dem niedrigsten Spannungsbedarf.After the burn-up reserve on spark gap FS1 due to hot gas corrosion and spark erosion is used up, the Spark path to the spark path FS2 or FS3, respectively to the spark path with the lowest voltage requirement.

    Bei einem Betrieb der Brennkraftmaschine mit hohen Verbrennungsrückständen wird sich der Funke vorwiegend über die Funkenlaufwege FS2 oder FS3 ausbilden und somit den Gleitfunkenlaufweg auf der keramischen Isolatorfußspitze freibrennen. Das stellt sicher, daß die Zündkerze geringe Nebenschlußeigenschaften hat. Besondere Vorteile bietet der Funkenlaufweg FS3 beim Kaltstart durch die serielle Anordnung der Mittelelektrode 3 und der Masseelektrode 4. Durch den langen Funkenweg sichert der Funkenlaufweg FS3 außerdem ein sicheres Entflammen des Gemisches wobei gewährleistet ist, daß auch bei inhomogenen Gemischen die Brennkraftmaschine sicher rundläuft.When the internal combustion engine is operating with high combustion residues the spark will be predominantly over the spark paths Form FS2 or FS3 and thus the sliding spark path Burn free on the ceramic insulator tip. That poses sure that the spark plug has low shunt characteristics. The spark path FS3 offers special advantages during a cold start through the serial arrangement of the center electrode 3 and the ground electrode 4. The long spark path ensures the spark path FS3 also ensures a safe ignition of the mixture It is ensured that the internal combustion engine even with inhomogeneous mixtures runs smoothly.

    Claims (9)

    Zündkerze für eine Brennkraftmaschine mit einem Zündkerzenkörper aus einem elektrisch leitenden Material, einem elektrischen Isolator, der zentrisch im Zündkerzenkörper angeordnet ist, einer Mittelelektrode, die in einer Isolatorbohrung im Isolator angeordnet ist und von der Isolatorfußspitze vorsteht, und seitlich zur Mittelelektrode angestellten Masseelektroden, die elektrisch mit dem Zündkerzenkörper verbunden sind, dadurch gekennzeichnet, daß wenigstens eine (4) der Masseelektroden (4, 5) so angeordnet ist, daß ihre dem Isolator (2) zugewandte Unterkante mit der Stirnfläche der Isolatorfußspitze in einer Ebene liegt. Spark plug for an internal combustion engine with a spark plug body made of an electrically conductive material, an electrical insulator, which is arranged centrally in the spark plug body, a center electrode which is arranged in an insulator bore in the insulator and protrudes from the insulator tip, and Ground electrodes positioned laterally to the center electrode, which are electrically connected to the spark plug body, characterized in that at least one (4) of the ground electrodes (4, 5) is arranged such that its lower edge facing the insulator (2) lies in one plane with the end face of the insulator tip. Zündkerze nach Anspruch 1, dadurch gekennzeichnet, daß die Isolatorbohrung im Bereich der Isolatorfußspitze ringförmig versenkt (6) ist.Spark plug according to claim 1, characterized in that the insulator hole in the area of the insulator tip is ring-shaped is sunk (6). Zündkerze nach Anspruch 2, dadurch gekennzeichnet, daß der Versenkwinkel (α) zwischen 15° und 45° liegt.Spark plug according to claim 2, characterized in that the countersink angle (α) is between 15 ° and 45 °. Zündkerze nach Anspruch 3, dadurch gekennzeichnet, daß der Versenkwinkel (α) zwischen 25° und 35° liegt.Spark plug according to claim 3, characterized in that the countersink angle (α) is between 25 ° and 35 °. Zündkerze nach Anspruch 4, dadurch gekennzeichnet, daß der Versenkwinkel (α) 30° beträgt.Spark plug according to claim 4, characterized in that the countersink angle (α) is 30 °. Zündkerze nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß der Spaltmaß (a) der Versenkung (6) zwischen 0,2 und 1,0 mm liegt. Spark plug according to one of claims 2 to 5, characterized characterized in that the gap dimension (a) of the recess (6) between 0.2 and 1.0 mm. Zündkerze nach Anspruch 6, dadurch gekennzeichnet, daß der Spaltmaß (a) zwischen 0,4 und 0,6 mm liegt.Spark plug according to Claim 6, characterized in that the gap dimension (a) is between 0.4 and 0.6 mm. Zündkerze nach Anspruch 7, dadurch gekennzeichnet, daß für den Spaltmaß (a) gilt a ≤ 0,5 * EA 3.1, wobei EA 3.1 die Gleitfunkenstrecke der Elektrodenstrecke zwischen der Masseelektrode (4, 5 ) und der Mittelelektrode (3) ist.Spark plug according to claim 7, characterized in that for the gap dimension (a) applies a ≤ 0.5 * EA 3.1, where EA 3.1 the Sliding spark gap of the electrode gap between the ground electrode (4, 5) and the center electrode (3). Zündkerze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Elektrodenabstände zwischen einer Masseelektrode (3) und der Mittelelektrode (3), zwischen der Unterkante der einen Masseelektrode und der Isolationfußspitze und zwischen der wenigstens einen Masseelektrode (4) und der Mittelelektrode im Verhältnis 3:2:6 stehen.Spark plug according to one of the preceding claims, characterized characterized in that the electrode distances between one Ground electrode (3) and the center electrode (3), between the Bottom edge of a ground electrode and the insulation tip and between the at least one ground electrode (4) and the Center electrode in a ratio of 3: 2: 6.
    EP98101912A 1997-02-06 1998-02-04 Sparking plug Expired - Lifetime EP0858139B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19704524 1997-02-06
    DE19704524A DE19704524C2 (en) 1997-02-06 1997-02-06 Spark plug for an internal combustion engine

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    Publication Number Publication Date
    EP0858139A1 true EP0858139A1 (en) 1998-08-12
    EP0858139B1 EP0858139B1 (en) 2002-10-16

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    EP98101912A Expired - Lifetime EP0858139B1 (en) 1997-02-06 1998-02-04 Sparking plug

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    EP (1) EP0858139B1 (en)
    AT (1) ATE226368T1 (en)
    DE (2) DE19704524C2 (en)
    ES (1) ES2184152T3 (en)

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    DE19924682A1 (en) * 1999-05-29 2000-12-07 Daimler Chrysler Ag Ignition plug as measurement probe for ion current measurement in IC engine, has central electrode with maximum electrode diameter corresponding to maximum diameter of insulator

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    DE10227513B9 (en) * 2002-06-19 2004-09-30 Beru Ag spark plug
    DE10319698A1 (en) * 2003-05-02 2004-11-18 Volkswagen Ag Spark plug for I.C. engines comprises a middle electrode made from a material other than precious metals and a mass electrodes
    JP2006049206A (en) * 2004-08-06 2006-02-16 Denso Corp Spark plug for internal combustion engine
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    Also Published As

    Publication number Publication date
    DE59805929D1 (en) 2002-11-21
    EP0858139B1 (en) 2002-10-16
    ES2184152T3 (en) 2003-04-01
    DE19704524C2 (en) 2002-06-20
    DE19704524A1 (en) 1998-08-13
    ATE226368T1 (en) 2002-11-15

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