EP1650843B1 - Spark plug connector - Google Patents

Spark plug connector Download PDF

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Publication number
EP1650843B1
EP1650843B1 EP05014008A EP05014008A EP1650843B1 EP 1650843 B1 EP1650843 B1 EP 1650843B1 EP 05014008 A EP05014008 A EP 05014008A EP 05014008 A EP05014008 A EP 05014008A EP 1650843 B1 EP1650843 B1 EP 1650843B1
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EP
European Patent Office
Prior art keywords
spark plug
plug connector
connector according
suppression device
interference suppression
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Application number
EP05014008A
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German (de)
French (fr)
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EP1650843A1 (en
Inventor
Markus Kraus
Arno Gschirr
Markus Kröll
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Innio Jenbacher GmbH and Co OG
Original Assignee
GE Jenbacher GmbH and Co OHG
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Publication of EP1650843A1 publication Critical patent/EP1650843A1/en
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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
    • H01T13/02—Details
    • H01T13/04—Means providing electrical connection to sparking plugs
    • H01T13/05—Means providing electrical connection to sparking plugs combined with interference suppressing or shielding means

Definitions

  • the present invention relates to a spark plug, especially for large engines, such as large gas engines, with an inductive suppression device having a ferromagnetic core with at least one winding, preferably a coil, and a resistive DC resistance of at least 20 ⁇ at 20 ° C.
  • Spark plug connectors form a substantially rigid connection between, especially in large engines, deep in holes in the engine block sunk spark plugs and leading to at least one ignition coil ignition cables. They can reach a length of more than half a meter. Their rigidity is chosen so that on the one hand a plugging on the spark plug, preferably without further tools, is easily possible. On the other hand, the spark plug usually have a certain residual flexibility on. So they are usually not completely rigid.
  • FR 1 279 413 discloses a spark plug of the type mentioned.
  • FR 2 225 857 shows spark plug with a suppressor, which has an ohmic resistance of 15 to 30 ⁇ and an inductance of 300 to 800 uH.
  • the FR 2 225 857 does not show a ferromagnetic core.
  • the object of the invention is to provide a spark plug, which helps to eliminate the problems described.
  • an inductive interference suppression device instead of the sole use of a resistive DC resistance significantly improves the energy balance, since the suppression device can be designed so that it is a high resistance for high frequencies and a very low resistance for the low-frequency useful energy.
  • the inductance of the winding or coil is used in conjunction with the ohmic DC resistance.
  • a coil with a ferromagnetic core must be used.
  • the winding or coil for providing the ohmic DC resistance may have a resistance wire.
  • the ferromagnetic core consists of electrically non-conductive or very high-resistance material according to the invention is a non-electrically conductive ferrite core and a specific DC resistance of the suppressor of at least 100 ⁇ , preferably at least 500 ⁇ , at 20 ° C. , used.
  • Fig. 1 shows a construction according to the invention in a schematic sectional view.
  • the ignition coil 1 is shown greatly simplified and can be performed as known in the art. From the ignition coil 1 leads a firing line 5 in the spark plug 2, which is arranged in a bore 6 in the engine block 7 and plugged onto a spark plug 4. Usually located on the side facing away from the spark plug 4 end of the spark plug 2, a plug contact, which serves for connection to an external ignition cable 5. This detail is not shown here but may be as known in the art.
  • the spark plug connector is preferably a separate component from the ignition coil 1. As a result, unnecessary stresses on the ignition coil are avoided by vibration and heat, since the ignition coil can be arranged via the ignition line 5 connected to the spark plug 2 plug at a remote location.
  • the spark plug 2 has a carrier 10 made of polytetrafluoroethylene with a central bore 11. Through this hole, the ignition line 5 is guided inside the spark plug 10 for inductive interference suppression device 3. As shown, the spark plug 2 is plugged onto the spark plug 4 as known in the art, making electrical contact via the terminal 12.
  • the in Substantially rigid supports 10 of the spark plug connector permit the attachment to the spark plug 4 to be sufficient to secure the spark plug connector.
  • a fixing device 8 which fixes the spark plug connector 10 to the engine block 7.
  • screw, plug or other clamp connections can be provided. In order to obtain the greatest effect of the inductive interference suppression device 3 with the lowest possible losses, the suppression device 3 should be mounted as close as possible to the main interference source.
  • the inductive suppression element 3 should electrically, if possible near, preferably substantially directly connected to the terminal 12. This is shown in FIGS. 2 and 3.
  • the inductive suppressor 3 By the inductive suppressor 3, the entire ignition line 5 is suppressed on the side facing away from the spark plug side of the device 3. This is particularly favorable for remote ignition coils, otherwise the ignition cables 5, which are very long, especially in large engines, would act as antennas for the interference signals produced by the spark plug.
  • the inductive interference suppression device 3 should in principle be designed so that interference, especially in the frequency range between 1 MHz and 1 GHz, preferably between 30 MHz and one GHz, are particularly well suppressed.
  • the inductive interference suppression device has an inductance of between 200 ⁇ H and 500 ⁇ H, preferably between 300 ⁇ H and 400 ⁇ H.
  • the dielectric strength of the spark plug 2 should be more than 10 KV, preferably more than 30 KV. Together with the ohmic DC resistances of the inductive interference suppression device 3 already indicated above, this enables the transmission of high ignition energies with very low losses and thus very low heat generation.
  • ignition energies of more than 200 mJ to 1 J with an ignition frequency or a number of firings per unit time of 12.5 Hz to 15 Hz can be transmitted without problems.
  • this may preferably consist of a nickel-chromium alloy. Examples of such alloys are sold under the trade name ISA-CHROM.
  • Cheap variants of the spark plug connector provide that it has a length of at least 10 cm, preferably between 40 cm and 70 cm. Based on the position of the inductive suppression device 3 but can also be provided that the remote from the terminal 12 end of the spark plug 2 from the Terminal contact 12 remote end of the inductive Entstör founded 3 at least 10 cm, preferably between 40 cm and 70 cm, is removed.
  • Fig. 2 shows in detail the only schematically shown in Fig. 1 inductive Entstör worn 3. It has conveniently a maximum length of 80 mm and a maximum diameter of 12 mm.
  • a winding 13 of resistance wire 16 is arranged around a ferromagnetic core 14, for example of non-electrically conductive ferrite.
  • Kem and winding are shown in the upper region in a sectional view and in the lower region in a side view.
  • the resistance wire 16 and normal wire can be used with a lower ohmic resistance, if then an additional ohmic resistance component with the winding 13 is connected in series.
  • the winding 13 is wound in the embodiment shown on an additional winding support 15.
  • the winding 13 of the wire or the resistance wire is wound directly onto the core 14.
  • a dielectric strength of the spark plug preferably between two terminals 17 and 12, of more than 10 kV, preferably more than 30 kV, can be achieved.
  • high-resistance ferrite cores are ideal for this variant.
  • the core 14 is arranged inside with respect to the winding 13.
  • the terminal 12 for the spark plug 4 is preferably arranged directly at the lower end of the winding 13.
  • a plug-in, clamping or screwing device 17 is provided, which serves for contacting the ignition line 5.
  • the ignition line 5 is connected directly to the resistance wire 16, wherein the component 17 can be dispensed with.
  • the inductive suppression element 3, as well as the ignition line 5, can be clamped in the bore 11 of the carrier 10, but also be potted with this.
  • FIG. 3 shows a further variant of the interference suppression device 3. These; has a ceramic body 18, which surrounds the ferromagnetic core 14, the winding 13 with the ohmic DC resistance and in this embodiment also the terminal contact 12.
  • the carrier 10 in turn surrounds the ceramic body 18.
  • the space between the coil 13 and the ceramic body 3 may be filled with polyester resin or the like, for example.
  • Fig. 4 shows an electrical equivalent circuit diagram for the arrangement of ignition coil 1, spark plug 2 with inductive Entstör named 3 and the spark plug 4, the ignition coil 1 and the separately arranged spark plug 2 are electrically connected to each other via the ignition line 5.
  • the inductive interference suppression device 3 comprises both the inductance 3b and the ohmic DC resistance 3a.
  • the ohmic DC resistance of 20 Q at 20 ° C can be caused and / or supplemented or complemented by a series-connected additional resistance component 3a, as shown in Fig. 4. It is more favorable, however, that the DC resistance is provided by using resistance wire for the coil or winding 13, preferably completely.

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  • Ignition Installations For Internal Combustion Engines (AREA)
  • Spark Plugs (AREA)
  • Pyrane Compounds (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

The spark plug connector has an inductive interference suppression device having a ferromagnetic core with one winding and an ohmic d.c. resistance of 20 Ohms at 20deg C. The inductive interference suppression device has an ohmic d.c. resistance of at least 100 Ohm at 20deg C. The inductive interference suppression device has an ohmic d.c. resistance of 500 Ohms at 20deg C. The winding has a resistor wire to provide the ohmic d.c. resistance. A resistor component is connected in series with the winding and a resistor component is connected in series with the winding in the interference suppression device. A terminal contact is provided where the inductive interference suppression device is electrically connected as close as possible to the terminal contact.

Description

Die vorliegende Erfindung betrifft einen Zündkerzenstecker, insbesondere für Großmotoren, wie zum Beispiel große Gasmotoren, mit einer induktiven Entstöreinrichtung, welche einen ferromagnetischen Kern mit zumindest einer Wicklung, vorzugsweise einer Spule, und einen ohmschen Gleichstromwiderstand von mindestens 20 Ω bei 20° C aufweist.The present invention relates to a spark plug, especially for large engines, such as large gas engines, with an inductive suppression device having a ferromagnetic core with at least one winding, preferably a coil, and a resistive DC resistance of at least 20 Ω at 20 ° C.

Zündkerzenstecker bilden eine im Wesentlichen steife Verbindung zwischen, vor allem bei Großmotoren, tief in Bohrungen im Motorblock versenkten Zündkerzen und den zu zumindest einer Zündspule führenden Zündleitungen. Sie können eine Länge von mehr als einem halben Meter erreichen. Ihre Steifigkeit ist so gewählt, dass einerseits ein Aufstecken auf die Zündkerze, vorzugsweise ohne weiteres Werkzeug, einfach möglich ist. Andererseits weisen die Zündkerzenstecker in der Regel aber eine gewisse Restbiegbarkeit auf. Sie sind also meist nicht vollständig starr.Spark plug connectors form a substantially rigid connection between, especially in large engines, deep in holes in the engine block sunk spark plugs and leading to at least one ignition coil ignition cables. They can reach a length of more than half a meter. Their rigidity is chosen so that on the one hand a plugging on the spark plug, preferably without further tools, is easily possible. On the other hand, the spark plug usually have a certain residual flexibility on. So they are usually not completely rigid.

Des Weiteren ist es beim Stand der Technik bekannt, zur Entstörung von Zündanlagen ohmsche Widerstandselemente zu verwenden. Der Nachteil dieser Entstörwiderstände ist, dass diese zum Dämpfen der hochfrequenten Störungen unnötig viel Nutzenergie verbrauchen. Diese Verlustenergie muss einerseits durch das Zündsystem zur Verfügung gestellt werden und führt andererseits zur Erwärmung der beteiligten Bauteile, wie zum Beispiel des Zündkerzensteckers. Diese Erwärmung ist insofern sehr problematisch, als bedingt durch die elektrische Isolationsfestigkeit, welche unter anderem vom Zündkerzenstecker gefordert wird, Materialien verwendet werden, welche auch schlechte Wärmeleiter sind. Diese Problematik verschärft sich besonders, wenn man, wie bei Großmotoren üblich, mit Zündsystemen arbeitet, die sehr hohe Zündenergien erzeugen. Die FR 1 279 413 offenbart einen Zündkerzenstecker der eingangs genannten Art. FR 2 225 857 zeigt Zünderkerzenstecker mit einem Entstörelement, das einen ohmschen Widerstand von 15 bis 30 Ω und eine Induktivität von 300 bis 800 µH aufweist. Die FR 2 225 857 zeigt keinen ferromagnetischen Kern.Furthermore, it is known in the prior art, to use suppression of ignition systems ohmic resistance elements. The disadvantage of these suppression resistors is that they consume unnecessarily much useful energy for damping the high-frequency interference. This loss energy must be made available on the one hand by the ignition system and on the other hand leads to heating of the components involved, such as the spark plug. This heating is very problematic insofar as due to the electrical insulation strength, which is required among other things of the spark plug, materials are used, which are also poor heat conductors. This problem is exacerbated especially when, as is common in large engines, working with ignition systems that generate very high ignition energies. The FR 1 279 413 discloses a spark plug of the type mentioned. FR 2 225 857 shows spark plug with a suppressor, which has an ohmic resistance of 15 to 30 Ω and an inductance of 300 to 800 uH. The FR 2 225 857 does not show a ferromagnetic core.

Aufgabe der Erfindung ist es einen Zündkerzenstecker zu schaffen, der dazu beiträgt, die geschilderten Probleme zu beseitigen.The object of the invention is to provide a spark plug, which helps to eliminate the problems described.

Diese Aufgabe wird mit einem Zündkerzenstecker, insbesondere für Großmotoren, gemäß Anspruch 1 gelöst.This object is achieved with a spark plug, in particular for large engines, according to claim 1.

Die Verwendung einer erfindungsgemäßen induktiven Entstöreinrichtung anstelle der alleinigen Verwendung eines ohmschen Gleichstromwiderstands verbessert die Energiebilanz deutlich, da die Entstöreinrichtung so ausgelegt werden kann, dass sie gleichzeitig für hohe Frequenzen einen hohen Widerstand und für die niederfrequentere Nutzenergie einen sehr geringen Widerstand darstellt. Um ein optimales Entstörverhalten zu erreichen, wird die Induktivität der Windung bzw. Spule in Verbindung mit dem ohmschen Gleichstromwiderstand eingesetzt. Zum Erreichen einer ausreichenden Induktivität muss eine Wicklung mit einem ferromagnetischen Kern verwendet werden. Um die Bauform möglichst klein zu halten, kann die Wicklung bzw. Spule zur Bereitstellung des ohmschen Gleichstromwiderstandes einen Widerstandsdraht aufweisen. Eine bevorzugte Ausführungsform sieht vor, dass der ferromagnetische Kern aus elektrisch nicht leitendem bzw. sehr hochohmigem Material besteht gemäß der Erfindung ist ein nicht elektrisch leitender Ferritkern sowie ein spezifischer Gleichstromwiderstand der Entstöreinrichtung von mindestens 100 Ω, vorzugsweise von mindestens 500 Ω, bei 20° C, benützt.The use of an inductive interference suppression device according to the invention instead of the sole use of a resistive DC resistance significantly improves the energy balance, since the suppression device can be designed so that it is a high resistance for high frequencies and a very low resistance for the low-frequency useful energy. To achieve optimum anti-interference behavior reach, the inductance of the winding or coil is used in conjunction with the ohmic DC resistance. To achieve sufficient inductance, a coil with a ferromagnetic core must be used. In order to keep the design as small as possible, the winding or coil for providing the ohmic DC resistance may have a resistance wire. A preferred embodiment provides that the ferromagnetic core consists of electrically non-conductive or very high-resistance material according to the invention is a non-electrically conductive ferrite core and a specific DC resistance of the suppressor of at least 100 Ω, preferably at least 500 Ω, at 20 ° C. , used.

Weitere Einzelheiten und Vorteile der vorliegenden Erfindung ergeben sich aus der nachfolgenden Figurenbeschreibung. Dabei zeigt

Fig. 1
ein erfindungsgemäßes Ausführungsbeispiel eines Zündkerzensteckers,
Fig. 2
einen Teilbereich des Zündkerzensteckers aus Fig. 1 im Bereich der induktiven Entstöreinrichtung.
Fig. 3
eine Ausführungsvariante der induktiven Entstöreinrichtung umgeben von einem Keramikkörper und
Fig. 4
ein elektrisches Ersatzschaltbild.
Further details and advantages of the present invention will become apparent from the following description of the figures. It shows
Fig. 1
an inventive embodiment of a spark plug,
Fig. 2
a portion of the spark plug connector of Fig. 1 in the field of inductive suppression device.
Fig. 3
a variant of the inductive Entstöreinrichtung surrounded by a ceramic body and
Fig. 4
an electrical equivalent circuit diagram.

Fig. 1 zeigt einen erfindungsgemäßen Aufbau in einer schematischen Schnittdarstellung. Die Zündspule 1 ist stark vereinfacht dargestellt und kann wie beim Stand der Technik bekannt ausgeführt werden. Von der Zündspule 1 führt eine Zündleitung 5 in den Zündkerzenstecker 2, welcher in einer Bohrung 6 im Motorblock 7 angeordnet und auf eine Zündkerze 4 aufgesteckt ist. Üblicherweise befindet sich auf dem von der Zündkerze 4 abgewandten Ende des Zündkerzensteckers 2 ein Steckkontakt, welcher zur Verbindung mit einem externen Zündkabel 5 dient. Dieses Detail ist hier nicht dargestellt, kann aber wie beim Stand der Technik bekannt ausgeführt sein. Der Zündkerzenstecker ist bevorzugt ein von der Zündspule 1 separates Bauteil. Hierdurch werden unnötige Belastungen der Zündspule durch Vibration und Wärme vermieden, da die Zündspule über die Zündleitung 5 mit dem Zündkerzenstecker 2 verbunden an einem entfernten Ort angeordnet sein kann.Fig. 1 shows a construction according to the invention in a schematic sectional view. The ignition coil 1 is shown greatly simplified and can be performed as known in the art. From the ignition coil 1 leads a firing line 5 in the spark plug 2, which is arranged in a bore 6 in the engine block 7 and plugged onto a spark plug 4. Usually located on the side facing away from the spark plug 4 end of the spark plug 2, a plug contact, which serves for connection to an external ignition cable 5. This detail is not shown here but may be as known in the art. The spark plug connector is preferably a separate component from the ignition coil 1. As a result, unnecessary stresses on the ignition coil are avoided by vibration and heat, since the ignition coil can be arranged via the ignition line 5 connected to the spark plug 2 plug at a remote location.

Der Zündkerzenstecker 2 weist einen Träger 10 aus Polytetrafluorethylen mit einer zentralen Bohrung 11 auf. Durch diese Bohrung ist die Zündleitung 5 im Inneren des Zündkerzensteckers 10 zur induktiven Entstöreinrichtung 3 geführt. Wie dargestellt, wird der Zündkerzenstecker 2 auf die Zündkerze 4, wie beim Stand der Technik bekannt, aufgesteckt, wobei eine elektrische Kontaktierung über den Anschlusskontakt 12 hergestellt wird. Der in sich im Wesentlichen steife Träger 10 des Zündkerzensteckers ermöglicht es, dass das Aufstecken auf die Zündkerze 4 zur Befestigung des Zündkerzensteckers ausreicht. Zusätzlich kann aber auch noch eine Fixiereinrichtung 8 vorgesehen sein, die den Zündkerzenstecker 10 am Motorblock 7 befestigt. Hierzu können Schraub-, Steck- oder andere Klemmverbindungen vorgesehen sein. Um die größte Wirkung der induktiven Entstöreinrichtung 3 mit möglichst geringen Verlusten zu erhalten, sollte die Entstöreinrichtung 3 möglichst nahe der Hauptstörquelle angebracht werden. Die Störquelle ist hierbei der Funkenüberschlag an den Elektroden der Zündkerze 4. Da die Anordnung der induktiven Entstöreinrichtung 3 in der Zündkerze aus mechanischen und thermischen Gründen sowie unter Berücksichtigung der Baugröße des induktiven Stärelementes 3 praktisch nicht möglich ist, sollte das induktive Entstörelement 3 elektrisch, möglichst nahe, vorzugsweise im Wesentlichen unmittelbar, an den Anschlusskontakt 12 angeschlossen sein. Dies ist in den Fig. 2 und 3 gezeigt. Durch das induktive Entstörelement 3 ist die gesamte Zündleitung 5 auf der von der Zündkerze abgewandten Seite der Einrichtung 3 entstört. Dies ist besonders bei entfernt angeordneten Zündspulen günstig, da ansonsten die vor allem bei Großmotoren sehr langen Zündleitungen 5 als Antennen für die von der Zündkerze produzierten Störsignale wirken würden.The spark plug 2 has a carrier 10 made of polytetrafluoroethylene with a central bore 11. Through this hole, the ignition line 5 is guided inside the spark plug 10 for inductive interference suppression device 3. As shown, the spark plug 2 is plugged onto the spark plug 4 as known in the art, making electrical contact via the terminal 12. The in Substantially rigid supports 10 of the spark plug connector permit the attachment to the spark plug 4 to be sufficient to secure the spark plug connector. In addition, however, it is also possible to provide a fixing device 8 which fixes the spark plug connector 10 to the engine block 7. For this purpose, screw, plug or other clamp connections can be provided. In order to obtain the greatest effect of the inductive interference suppression device 3 with the lowest possible losses, the suppression device 3 should be mounted as close as possible to the main interference source. Since the arrangement of the inductive suppression device 3 in the spark plug for mechanical and thermal reasons, and taking into account the size of the inductive power element 3 is practically impossible, the inductive suppression element 3 should electrically, if possible near, preferably substantially directly connected to the terminal 12. This is shown in FIGS. 2 and 3. By the inductive suppressor 3, the entire ignition line 5 is suppressed on the side facing away from the spark plug side of the device 3. This is particularly favorable for remote ignition coils, otherwise the ignition cables 5, which are very long, especially in large engines, would act as antennas for the interference signals produced by the spark plug.

Die induktive Entstöreinrichtung 3 sollte grundsätzlich so ausgelegt werden, dass Störungen vor allem im Frequenzbereich zwischen 1 MHz und 1 GHz, vorzugsweise zwischen 30 MHz und einem GHz, besonders gut unterdrückt werden. Hierzu ist es günstig, dass die induktive Entstöreinrichtung eine Induktivität zwischen 200 µH und 500 µH, vorzugsweise zwischen 300 µH und 400 µH, aufweist. Die Spannungsfestigkeit des Zündkerzensteckers 2 sollte insgesamt bei mehr als 10 KV, vorzugsweise bei mehr als 30 KV, liegen. Zusammen mit den bereits oben angegebenen ohmschen Gleichstromwiderständen der induktiven Entstöreinrichtung 3 ermöglicht dies die Übertragung hoher Zündenergien bei sehr geringen Verlusten und damit sehr geringer Wärmeentwicklung. In der Praxis können damit Zündenergien von mehr als 200 mJ bis 1 J mit einer Zündfrequenz bzw. einer Anzahl von Zündungen pro Zeiteinheit von 12.5 Hz bis 15 Hz problemlos übertragen werden. Bei Verwendung von Widerstandsdraht kann dieser vorzugsweise aus einer Nickel-Chromlegierung bestehen. Beispiele für solche Legierungen werden unter dem Handetsnamen ISA-CHROM vertrieben.The inductive interference suppression device 3 should in principle be designed so that interference, especially in the frequency range between 1 MHz and 1 GHz, preferably between 30 MHz and one GHz, are particularly well suppressed. For this purpose, it is favorable that the inductive interference suppression device has an inductance of between 200 μH and 500 μH, preferably between 300 μH and 400 μH. The dielectric strength of the spark plug 2 should be more than 10 KV, preferably more than 30 KV. Together with the ohmic DC resistances of the inductive interference suppression device 3 already indicated above, this enables the transmission of high ignition energies with very low losses and thus very low heat generation. In practice, ignition energies of more than 200 mJ to 1 J with an ignition frequency or a number of firings per unit time of 12.5 Hz to 15 Hz can be transmitted without problems. When using resistance wire, this may preferably consist of a nickel-chromium alloy. Examples of such alloys are sold under the trade name ISA-CHROM.

Günstige Varianten des Zündkerzensteckers sehen vor, dass er eine Länge von mindestens 10 cm, vorzugsweise zwischen 40 cm und 70 cm aufweist. Bezogen auf die Lage der induktiven Entstöreinrichtung 3 kann aber auch vorgesehen sein, dass das vom Anschlusskontakt 12 abgewandte Ende des Zündkerzensteckers 2 vom vom Anschlusskontakt 12 abgewandten Ende der induktiven Entstöreinrichtung 3 mindestens 10 cm, vorzugsweise zwischen 40 cm und 70 cm, entfernt ist.Cheap variants of the spark plug connector provide that it has a length of at least 10 cm, preferably between 40 cm and 70 cm. Based on the position of the inductive suppression device 3 but can also be provided that the remote from the terminal 12 end of the spark plug 2 from the Terminal contact 12 remote end of the inductive Entstöreinrichtung 3 at least 10 cm, preferably between 40 cm and 70 cm, is removed.

Fig. 2 zeigt im Detail die in Fig. 1 nur schematisch dargestellte induktive Entstöreinrichtung 3. Sie hat günstigerweise eine Maximallänge von 80 mm und einen Maximaldurchmesser von 12 mm. Im gezeigten Beispiel ist um einen ferromagnetischen Kern 14, zum Beispiel aus nicht elektrisch leitendem Ferrit, eine Wicklung 13 aus Widerstandsdraht 16 angeordnet. In Fig. 2 sind Kem und Wicklung im oberen Bereich in einer Schnittdarstellung und im unteren Bereich in einer Seitenansicht gezeigt. Anstelle des Widerstandsdrahtes 16 kann auch normaler Draht mit-einem geringeren ohmschen Widerstand verwendet werden, wenn dann ein zusätzlicher ohmscher Widerstandsbauteil mit der Wicklung 13 in Reihe geschaltet wird. Die Wicklung 13 ist im gezeigten Ausführungsbeispiel auf einen zusätzlichen Wicklungsträger 15 aufgewickelt. Dieser kann jedoch in anderen Ausführungsbeispielen auch weggelassen werden. In diesen Fällen wird die Wicklung 13 des Drahtes bzw. des Widerstandsdrahtes direkt auf den Kern 14 aufgewickelt. Durch entsprechende. Auswahl des Materials des Kerns 14 und der Isolierung des Drahtes bzw. Widerstandsdrahtes kann auch hier eine Spannungsfestigkeit des Zündkerzensteckers, vorzugsweise zwischen beiden Anschlüssen 17 und 12, von mehr als 10 kV, vorzugsweise mehr als 30 kV, erreicht werden. Für diese Variante bieten sich vor allem hochohmige Ferritkerne an. Günstig ist es jedenfalls, wenn der Kern 14 innenliegend bezüglich der Wicklung 13 angeordnet ist. Aus den oben angeführten Gründen ist bevorzugt direkt am unteren Ende der Wicklung 13 der Anschlusskontakt 12 für die Zündkerze 4 angeordnet. An dem entgegengesetzten Ende der Wicklung 13 ist eine Steck-, Klemm- oder Schraubeinrichtung 17 vorgesehen, welche der Kontaktierung der Zündleitung 5 dient. Günstig sind hier Verbindungen die durch Einschieben der Zündleitungen 5 in die Bohrung 11 herstellbar und vorzugsweise anschließend nicht mehr lösbar sind. Alternativ kann aber auch vorgesehen sein, dass die Zündleitung 5 direkt mit dem Widerstandsdraht 16 verbunden wird, wobei das Bauteil 17 entfallen kann. Das induktive Entstörelement 3, wie auch die Zündleitung 5, kann in der Bohrung 11 des Trägers 10 eingeklemmt aber auch mit diesem vergossen werden.Fig. 2 shows in detail the only schematically shown in Fig. 1 inductive Entstöreinrichtung 3. It has conveniently a maximum length of 80 mm and a maximum diameter of 12 mm. In the example shown, a winding 13 of resistance wire 16 is arranged around a ferromagnetic core 14, for example of non-electrically conductive ferrite. In Fig. 2 Kem and winding are shown in the upper region in a sectional view and in the lower region in a side view. Instead of the resistance wire 16 and normal wire can be used with a lower ohmic resistance, if then an additional ohmic resistance component with the winding 13 is connected in series. The winding 13 is wound in the embodiment shown on an additional winding support 15. However, this can also be omitted in other embodiments. In these cases, the winding 13 of the wire or the resistance wire is wound directly onto the core 14. By appropriate. Selection of the material of the core 14 and the insulation of the wire or resistance wire, a dielectric strength of the spark plug, preferably between two terminals 17 and 12, of more than 10 kV, preferably more than 30 kV, can be achieved. Above all, high-resistance ferrite cores are ideal for this variant. In any case, it is favorable if the core 14 is arranged inside with respect to the winding 13. For the reasons given above, the terminal 12 for the spark plug 4 is preferably arranged directly at the lower end of the winding 13. At the opposite end of the winding 13, a plug-in, clamping or screwing device 17 is provided, which serves for contacting the ignition line 5. Conveniently here are compounds which can be produced by inserting the ignition lines 5 into the bore 11 and preferably subsequently are no longer detachable. Alternatively, however, it can also be provided that the ignition line 5 is connected directly to the resistance wire 16, wherein the component 17 can be dispensed with. The inductive suppression element 3, as well as the ignition line 5, can be clamped in the bore 11 of the carrier 10, but also be potted with this.

In der Fig. 3 ist eine weitere Variante der Entstöreinrichtung 3 gezeigt. Diese; weist einen Keramikkörper 18 auf, welcher den ferromagnetischen Kern 14, die Wicklung 13 mit dem ohmschen Gleichstromwiderstand sowie in diesem Ausführungsbeispiel auch den Anschlusskontakt 12 umgibt. Wenn das Ausführungsbeispiel gemäß Fig. 3 in den Zündkerzenstecker integriert ist, umgibt der Träger 10 wiederum den Keramikkörper 18. Der Zwischenraum zwischen der Wicklung 13 und dem Keramikkörper 3 kann zum Beispiel mit Polyesterharz oder dergleichen ausgegossen werden.FIG. 3 shows a further variant of the interference suppression device 3. These; has a ceramic body 18, which surrounds the ferromagnetic core 14, the winding 13 with the ohmic DC resistance and in this embodiment also the terminal contact 12. When the embodiment of FIG. 3 is integrated into the spark plug, the carrier 10 in turn surrounds the ceramic body 18. The space between the coil 13 and the ceramic body 3 may be filled with polyester resin or the like, for example.

Fig. 4 zeigt ein elektrisches Ersatzschaltbild für die Anordnung von Zündspule 1, Zündkerzenstecker 2 mit induktiver Entstöreinrichtung 3 und der Zündkerze 4, Die Zündspule 1 und der dazu separat angeordnete Zündkerzenstecker 2 sind über die Zündleitung 5 miteinander elektrisch verbunden. Die induktive Entstöreinrichtung 3 umfasst sowohl die Induktivität 3b als auch den ohmschen Gleichstromwiderstand 3a. Der ohmsche Gleichstromwiderstand von 20 Q bei 20° C kann durch ein in Reihe geschaltetes zusätzliches Widerstandsbauteil 3a hervorgerufen und/oder vervollständigt bzw. ergänzt werden, wie dies in Fig. 4 dargestellt ist. Günstiger ist es jedoch, dass der Gleichstromwiderstand durch Verwendung von Widerstandsdraht für die Spule bzw. Wicklung 13, vorzugsweise vollständig, bereitgestellt wird.Fig. 4 shows an electrical equivalent circuit diagram for the arrangement of ignition coil 1, spark plug 2 with inductive Entstöreinrichtung 3 and the spark plug 4, the ignition coil 1 and the separately arranged spark plug 2 are electrically connected to each other via the ignition line 5. The inductive interference suppression device 3 comprises both the inductance 3b and the ohmic DC resistance 3a. The ohmic DC resistance of 20 Q at 20 ° C can be caused and / or supplemented or complemented by a series-connected additional resistance component 3a, as shown in Fig. 4. It is more favorable, however, that the DC resistance is provided by using resistance wire for the coil or winding 13, preferably completely.

Claims (14)

  1. A spark plug connector (2), in particular for large engines, with an inductive interference suppression device (3) which has a ferromagnetic core (14) with at least one winding (13), preferably a coil, and an ohmic d.c. resistance of at least 20 Ω at 20°C, characterised in that the inductive interference suppression device (3) has an inductance of between 200 µH and 500 µH, preferably of between 300 µH and 400 µH, and that it has an ohmic d.c. resistance of at least 100 Ω at 20°C, preferably of at least 500 Ω at 20°C.
  2. A spark plug connector according to claim 1, characterised in that the winding (18) has a resistor wire (16) to provide the ohmic d.c. resistance.
  3. A spark plug connector according to claim 1 or 2, characterised in that a resistor component is connected in series with the winding (13), being preferably located in the inductive interference suppression device (3).
  4. A spark plug connector according to one of claims 1 to 3, having a terminal contact for a spark plug, characterised in that the inductive interference suppression device (3) is electrically connected as close as possible, preferably directly, to the terminal contact (12).
  5. A spark plug connector according to one of claims 1 to 4, characterised in that the ferromagnetic core (14), the winding (13), and the ohmic d.c. resistor are at least partly surrounded by a ceramic element (18).
  6. A spark plug connector according to one of claims 1 to 5, having a terminal contact for a spark plug, characterised in that the inductive interference suppression device (3) has at its end remote from the terminal contact (12) a plug, clamping or screw connection device (17) for making contact with a spark plug lead (5) which is at least partly guided inside the spark plug connector.
  7. A spark plug connector according to one of claims 1 to 6, characterised in that the ferromagnetic core (14) includes ferrite or is made substantially from ferrite.
  8. A spark plug connector according to one of claims 1 to 7, characterised in that the inductive interference suppression device is effective in the frequency range between 1 MHz and 1 GHz, preferably between 30 MHz and 1 GHz.
  9. A spark plug connector according to one of claims 1 to 8, characterised in that it has an electric strength more than 10 kV, preferably more than 30 kV.
  10. A spark plug connector according to one of claims 1 to 9, characterised in that it has a length of at least 10 cm, preferably of between 40 cm and 70 cm.
  11. A spark plug connector according to one of claims 1 to 9, having a terminal contact for a spark plug, characterised in that the end of the spark plug connector (2) remote from the terminal contact (12) is at least 10 cm, preferably between 40 cm and 70 cm, away from the end of the inductive interference suppression device (3) which is remote from the terminal contact (12).
  12. A spark plug connector according to one of claims 1 to 11, characterised in that it is substantially a rigid component, preferably having a support including polytetrafluoroethylene.
  13. A spark plug connector according to one of claims 1 to 12, characterised in that it is a separate component from an ignition coil (1).
  14. A spark plug connector according to one of claims 1 to 13, characterised in that the winding is wound directly onto the core (14).
EP05014008A 2004-10-22 2005-06-29 Spark plug connector Active EP1650843B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0178604A AT414319B (en) 2004-10-22 2004-10-22 ZÜNDKERZENSTECKER

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EP1650843A1 EP1650843A1 (en) 2006-04-26
EP1650843B1 true EP1650843B1 (en) 2007-12-19

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EP05014008A Active EP1650843B1 (en) 2004-10-22 2005-06-29 Spark plug connector

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US (1) US7252078B2 (en)
EP (1) EP1650843B1 (en)
AT (2) AT414319B (en)
DE (1) DE502005002277D1 (en)
ES (1) ES2297568T3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7185622B2 (en) * 2004-03-12 2007-03-06 Doll Martin J Method and apparatus for interconnecting a coil and a spark plug
US7455537B2 (en) * 2006-06-16 2008-11-25 Briggs & Stratton Corporation Spark plug boot
US9356433B2 (en) * 2012-05-10 2016-05-31 Denso International America, Inc. Ignition coil captured resistor
JP5931955B2 (en) * 2014-05-12 2016-06-08 日本特殊陶業株式会社 Spark plug
DE102018108292B4 (en) * 2017-11-17 2023-05-11 Borgwarner Ludwigsburg Gmbh Connector for connecting an ignition coil to a spark plug and protective tube for a connector
CN109301612A (en) * 2018-10-20 2019-02-01 东莞市鸿顺电线有限公司 A kind of electric connector with sparkproof function

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Publication number Priority date Publication date Assignee Title
US3178661A (en) * 1961-05-31 1965-04-13 Bosch Gmbh Robert Arrangement for eliminating parastic waves
FR1279413A (en) * 1960-11-09 1961-12-22 Prec Lyonnaise Improvements to anti-parasite devices for motor vehicles and other applications
NL7303607A (en) * 1973-03-15 1974-09-17
US3882341A (en) * 1974-01-24 1975-05-06 Champion Spark Plug Co Spark plug with inductive suppressor
IT1204274B (en) * 1986-04-24 1989-03-01 Claudio Filippone Electronically-controlled plasma ignition device for IC engine
DE9406689U1 (en) * 1994-04-21 1994-07-21 Beru Werk Ruprecht Gmbh Co A Interference suppressor for an ignition system of an internal combustion engine
DE19522657C2 (en) * 1995-06-22 1997-05-28 Beru Werk Ruprecht Gmbh Co A Interference suppressor for an ignition system of an internal combustion engine
US6463918B1 (en) * 2001-02-14 2002-10-15 Delphi Technologies, Inc. Ignition apparatus having an electrically floating shield
US6374816B1 (en) * 2001-04-23 2002-04-23 Omnitek Engineering Corporation Apparatus and method for combustion initiation
DE10154798A1 (en) * 2001-11-08 2003-05-22 Bosch Gmbh Robert Ignition system for internal combustion engine, has coil with interference suppressor made of two portions connected in series and incorporating inductor and resistor

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Publication number Publication date
US20060089024A1 (en) 2006-04-27
ES2297568T3 (en) 2008-05-01
ATE381799T1 (en) 2008-01-15
US7252078B2 (en) 2007-08-07
AT414319B (en) 2007-02-15
ATA17862004A (en) 2006-07-15
DE502005002277D1 (en) 2008-01-31
EP1650843A1 (en) 2006-04-26

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