EP1598910B1 - Connection device between a spark plug and an ignition coil - Google Patents

Connection device between a spark plug and an ignition coil Download PDF

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Publication number
EP1598910B1
EP1598910B1 EP05101360A EP05101360A EP1598910B1 EP 1598910 B1 EP1598910 B1 EP 1598910B1 EP 05101360 A EP05101360 A EP 05101360A EP 05101360 A EP05101360 A EP 05101360A EP 1598910 B1 EP1598910 B1 EP 1598910B1
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EP
European Patent Office
Prior art keywords
spark plug
ignition coil
connection device
elastic material
connecting bolt
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Expired - Fee Related
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EP05101360A
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German (de)
French (fr)
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EP1598910A1 (en
Inventor
Reinhard Seidl
Werner Steinberger
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP1598910A1 publication Critical patent/EP1598910A1/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
    • H01T13/40—Sparking plugs structurally combined with other devices
    • H01T13/44—Sparking plugs structurally combined with other devices with transformers, e.g. for high-frequency ignition

Definitions

  • the invention is based on a connecting element for connecting a spark plug and an ignition coil to an ignition coil housing, wherein the connecting element has a receiving space for the connecting bolt of the spark plug and arranged on the receiving space contact element for making electrical contact with the connecting bolt of the spark plug with the ignition coil.
  • Rod-type ignition coils usually use a shaft in the cylinder head above a spark plug as installation space.
  • the known ignition coils on a screw or locking device.
  • the motor in turn is equipped with a corresponding screw or latching device.
  • These connecting elements for connecting the spark plug with the ignition coil require a mechanically complex processing and a variety of mechanical components.
  • US 6,668,810 B1 discloses a Garseinichtung with a receiving space for the insulator region and the terminal bolt of the spark plug. Between the connecting bolt of the spark plug and the receiving space remains an air gap after assembly.
  • EP 0 406 509 A1 and the JP 60198713 A In each case a receiving space for the connecting bolt is shown, which does not have the contour of the spark plug after mounting on the spark plug.
  • the connecting element according to the invention is intended to reduce the number of mechanical components to be used and, with regard to the relative orientation and the distance to be maintained between the ignition coil contact and the connecting bolt, a spark plug permit a relatively large tolerance. This object is achieved by a connecting element according to claim 1.
  • the subclaims relate to advantageous developments of the subject invention.
  • a connecting element for connecting a spark plug and an ignition coil with a coil housing according to the aforementioned type, in which at least a portion of the ignition coil housing and at least the adjacent portion of the spark plug are enclosed by an insulating, elastic material, has the advantage that a conventional screw or locking device can be omitted and a very cost-effective solution is provided.
  • the service life of the ignition coil is extended by providing decoupling or vibration damping between the engine and the ignition coil.
  • the housing of the ignition coil can be substantially completely surrounded by the insulating, elastic material. As a result, a particularly good insulation is achieved.
  • a receiving space for the insulator region of the spark plug may be preformed in the insulating elastic material.
  • the receiving space for the connecting bolt of the spark plug is preformed with respect to this preferably tapered. This preforming facilitates the insertion of the spark plug or plugging the ignition coil, whereby the assembly is significantly simplified overall.
  • the insulator region of the spark plug adjoining the connecting bolt can, in an advantageous embodiment of the invention, be enclosed by the insulating, elastic material.
  • the contact element for making electrical contact with the connecting bolt of the spark plug with the ignition coil has an elastic contacting part.
  • the elastic contacting part may have a spring contact, for example a compression spring.
  • the elastic contacting part may be formed of an electrically conductive, elastic material and the receiving space for the connecting bolt of the spark plug may be preformed in the electrically conductive, elastic material. If the elastic contacting part is enclosed by the insulating, elastic material, additional mechanical or metallic contact elements are saved, and the production is further simplified.
  • the insulating, elastic material may be a non-conductive silicone.
  • the electrically conductive, elastic material may be an electrically conductive silicone.
  • FIG. 1 shows in side view and in partial section a portion of a first embodiment of an inventive, provided with a spring contact 28 connecting element 1, wherein an ignition coil 12 is shown plugged into a spark plug 10 state.
  • the ignition coil 12 has an ignition coil housing 14, which is substantially completely enclosed by an insulating, elastic silicone material 22. An adjacent portion of the spark plug 10 is also enclosed by the insulating, elastic silicone material 22. The ignition coil 12 is held by the silicone material 22 on the spark plug 10.
  • the connecting element 1 has a receiving space 16 preformed in the silicone material 22 for a connecting bolt 18 of the spark plug 10.
  • the terminal bolt 18 of the spark plug 10 is surrounded by and held by the insulating elastic silicone material 22.
  • a compression spring contact 28 is provided as a contact element 20 for making electrical contact with the connecting bolt 18 of the spark plug 10 with the ignition coil 12.
  • a portion of the ignition coil itself may be formed of the insulating, elastic silicone material.
  • FIG. 2 shows in side view and in partial section a portion of the in FIG. 1 shown connecting element, wherein the state is shown in which the ignition coil 12 is not yet plugged onto the spark plug 10.
  • the receiving space 16 for the connecting bolt 18 of the spark plug 10 is already preformed in the insulating, elastic silicone material 22.
  • a receiving space 24 for an insulator region 26 of the spark plug 10 is preformed in the insulating elastic silicone material 22.
  • the receiving space 16 for the connecting bolt 18 of the spark plug 10 is preformed with respect to this tapered.
  • the silicone in the region of the connecting bolt 18 and in the insulator region 26 is elastically formed on the spark plug contour. This ensures a mechanically stable, axial and radial anchoring of the ignition coil 10 in a plug shaft of the associated internal combustion engine.
  • FIG. 3 shows in side view and in partial section a portion of the in the FIGS. 1 and 2 shown connecting element 1, wherein the ignition coil 12 is shown in the plugged onto the spark plug 10, an angular position to this engaging state. Due to a predetermined installation situation in the engine, such an angular position can be realized due to the sufficient elasticity of the silicone material 22. However, the ignition coil 12 is still firmly held on the spark plug 10 and always contacted safely due to the compression spring contact 28.
  • FIG. 4 shows in side view and in partial section a portion of a further embodiment of a connecting element 1 'according to the invention.
  • the elastic contacting element 20 is formed by a region of electrically conductive silicone 30.
  • the receiving space 16 for the connecting bolt 18 of the spark plug 10 in the electrically conductive, elastic material 30 is preformed.
  • the contacting region made of electrically conductive silicone 30 is enclosed by the insulating elastic material 22.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht von einem Verbindungselement zur Verbindung einer Zündkerze und einer Zündspule mit einem Zündspulengehäuse aus, wobei das Verbindungselement einen Aufnahmeraum für den Anschlussbolzen der Zündkerze und ein am Aufnahmeraum angeordnetes Kontaktelement zur elektrischen Kontaktierung des Anschlussbolzens der Zündkerze mit der Zündspule aufweist.The invention is based on a connecting element for connecting a spark plug and an ignition coil to an ignition coil housing, wherein the connecting element has a receiving space for the connecting bolt of the spark plug and arranged on the receiving space contact element for making electrical contact with the connecting bolt of the spark plug with the ignition coil.

Aus der Praxis ist es bekannt, eine herkömmliche Zündspule am Motor anzuschrauben oder über eine mechanische Rastverbindung mit diesem zu verbinden. Zündspulen in Stabbauweise nutzen dabei üblicherweise einen Schacht im Zylinderkopf oberhalb einer Zündkerze als Einbauraum.From practice it is known to screw a conventional ignition coil on the engine or to connect via a mechanical latching connection with this. Rod-type ignition coils usually use a shaft in the cylinder head above a spark plug as installation space.

Konstruktionsbedingt weisen die bekannten Zündspulen eine Schraub- oder Rasteinrichtung auf. Der Motor wiederum ist mit einer korrespondierenden Schraub- bzw. Rasteinrichtung ausgestattet. Diese Verbindungselemente zur Verbindung der Zündkerze mit der Zündspule erfordern eine mechanisch aufwendige Bearbeitung und eine Vielzahl von mechanischen Bauteilen.By design, the known ignition coils on a screw or locking device. The motor in turn is equipped with a corresponding screw or latching device. These connecting elements for connecting the spark plug with the ignition coil require a mechanically complex processing and a variety of mechanical components.

Da sowohl eine solche bekannte Schraubverbindung als auch eine solche bekannte Rasteinrichtung die Zündspule starr am Motor halten, ist insbesondere im Kontaktbereich zwischen der Zündspule und der feststehenden Zündkerze ein genauer Abstand zwischen dem Zündspulenkontakt und dem Anschlussbolzen der Zündkerze und eine genaue relative Ausrichtung einzuhalten. Dies erfordert wiederum einen erheblichen Fertigungs-und Montageaufwand. Darüber hinaus sind die herkömmlichen Zündspulen nicht einfach zu montieren und erfordern oftmals den Einsatz von zum Teil speziellen Werkzeugen.Since both such a known screw and such a known locking device hold the ignition coil rigidly on the engine, especially in the contact area between the ignition coil and the fixed spark plug a precise distance between the ignition coil contact and the terminal bolt of the spark plug and an accurate relative alignment must be maintained. This in turn requires a considerable manufacturing and assembly costs. About that In addition, the conventional ignition coils are not easy to assemble and often require the use of some special tools.

US 6,668,810 B1 offenbart eine Halteeintichtung mit einem Aufnahmeraum für den Isolatorbereich und den Anschlussbolzen der Zündkerze. Zwischen dem Anschlussbolzen der Zündkerze und dem Aufnahmeraum verbleibt nach der Montage ein Luftspalt. In der EP 0 406 509 A1 und der JP 60198713 A ist jeweils ein Aufnahmeraum für den Anschlussbolzen gezeigt, der nach der Montage auf der Zündkerze nicht die Kontur der Zündkerze aufweist. US 6,668,810 B1 discloses a Halteseinichtung with a receiving space for the insulator region and the terminal bolt of the spark plug. Between the connecting bolt of the spark plug and the receiving space remains an air gap after assembly. In the EP 0 406 509 A1 and the JP 60198713 A In each case a receiving space for the connecting bolt is shown, which does not have the contour of the spark plug after mounting on the spark plug.

Es ist daher Aufgabe der vorliegenden Erfindung, ein Verbindungselement zur Verbindung einer Zündkerze mit einer Zündspule anzugeben, welche bei besonders einfacher Handhabung eine sichere und dichte Verbindung zwischen der Zündkerze und der Zündspule ermöglicht. Zudem soll das erfindungsgemäße Verbindungselement die Anzahl der zu verwendenden mechanischen Bauteile reduzieren und hinsichtlich der relative Ausrichtung und dem einzuhaltenden Abstand zwischen dem Zündspulenkontakt und dem Anschlussbolzen eine Zündkerze ein relativ große Toleranz erlauben. Diese Aufgabe wird durch ein Verbindungselement nach Anspruch 1 gelöst. Die Unteransprüche betreffen vorteilhafte Weiterbildungen des erfindungsgemäßen Gegenstands.It is therefore an object of the present invention to provide a connecting element for connecting a spark plug with an ignition coil, which allows for a particularly simple handling a secure and tight connection between the spark plug and the ignition coil. In addition, the connecting element according to the invention is intended to reduce the number of mechanical components to be used and, with regard to the relative orientation and the distance to be maintained between the ignition coil contact and the connecting bolt, a spark plug permit a relatively large tolerance. This object is achieved by a connecting element according to claim 1. The subclaims relate to advantageous developments of the subject invention.

Vorteile der ErfindungAdvantages of the invention

Ein Verbindungselement zur Verbindung einer Zündkerze und einer Zündspule mit einem Spulengehäuse gemäß der eingangs genannten Art, bei dem zumindest ein Teilbereich des Zündspulengehäuses und zumindest der angrenzende Teilbereich der Zündkerze von einem isolierenden, elastischen Material umschlossen sind, hat den Vorteil, dass eine herkömmliche Schraub-oder Rasteinrichtung entfallen kann und eine sehr kostengünstige Lösung bereit gestellt wird.A connecting element for connecting a spark plug and an ignition coil with a coil housing according to the aforementioned type, in which at least a portion of the ignition coil housing and at least the adjacent portion of the spark plug are enclosed by an insulating, elastic material, has the advantage that a conventional screw or locking device can be omitted and a very cost-effective solution is provided.

Es kommt folglich vorteilhafterweise auch zu keinem erheblichen metallischen Abrieb bei Schüttelbeanspruchung. Weiters ist die Anzahl der verwendeten Bauteile gegenüber bekannten Lösungen reduziert, und vorteilhafterweise sind auch keine mechanischen Bauteile vorhanden, die etwa beim Zündkerzenwechsel in den Brennraum fallen und dort Schäden anrichten könnte.Consequently, there is advantageously also no significant metallic abrasion under shaking stress. Furthermore, the number of components used compared to known solutions is reduced, and advantageously also no mechanical components are present, which could fall when the spark plug in the combustion chamber and cause damage there.

Darüber hinaus wird mit einer erfindungsgemäßen verbindung die Lebensdauer der Zündspule dadurch verlängert, dass eine Entkopplung bzw. Schwingungsdämpfung zwischen Motor und Zündspule geschaffen ist.In addition, with a connection according to the invention, the service life of the ignition coil is extended by providing decoupling or vibration damping between the engine and the ignition coil.

Dadurch dass das umschließende Material elastisch ist, ergibt sich auch der Vorteil, dass eine möglicherweise vorgegebene Winkelstellung zwischen Zündkerze und Zündspule ohne Mehraufwand realisiert werden.The fact that the enclosing material is elastic, there is also the advantage that a possibly predetermined angular position between the spark plug and ignition coil can be realized without additional effort.

Gemäß einer fertigungstechnisch vorteilhaften Ausführungsform kann das Gehäuse der Zündspule im Wesentlichen vollständig von dem isolierenden, elastischen Material umschlossen sein. Hierdurch wird eine besonders gute Isolierung erreicht.According to a production-technically advantageous embodiment, the housing of the ignition coil can be substantially completely surrounded by the insulating, elastic material. As a result, a particularly good insulation is achieved.

In dem isolierenden, elastischen Material kann zusätzlich auch ein Aufnahmeraum für den Isolatorbereich der Zündkerze vorgeformt sein. Der Aufnahmeraum für den Anschlussbolzen der Zündkerze ist gegenüber diesem vorzugsweise verjüngt vorgeformt. Diese Vorformung erleichtert das Einführen der Zündkerze bzw. Aufstecken der Zündspule, wodurch die Montage insgesamt signifikant vereinfacht wird.In addition, a receiving space for the insulator region of the spark plug may be preformed in the insulating elastic material. The receiving space for the connecting bolt of the spark plug is preformed with respect to this preferably tapered. This preforming facilitates the insertion of the spark plug or plugging the ignition coil, whereby the assembly is significantly simplified overall.

Um die Zündspule besonders fest am Motor festzuhalten, kann der an den Anschlussbolzen anschließende Isolatorbereich der Zündkerze bei einer vorteilhaften Ausführung der Erfindung von dem isolierenden, elastischen Material umschlossen sein.In order to hold the ignition coil particularly firmly on the engine, the insulator region of the spark plug adjoining the connecting bolt can, in an advantageous embodiment of the invention, be enclosed by the insulating, elastic material.

Um eine sichere Kontaktierung zu gewährleisten und auch Winkelstellungen zwischen Zündkerze und Zündspule zu ermöglichen, kann weiterhin vorgesehen sein, dass das Kontaktelement zur elektrischen Kontaktierung des Anschlussbolzens der Zündkerze mit der Zündspule ein elastisches Kontaktierungsteil aufweist.In order to ensure a secure contact and also allow angular positions between the spark plug and ignition coil, may further be provided that the contact element for making electrical contact with the connecting bolt of the spark plug with the ignition coil has an elastic contacting part.

Gemäß einer bevorzugten Ausführungsform kann das elastische Kontaktierungsteil einen Federkontakt, beispielsweise eine Druckfeder, aufweisen.According to a preferred embodiment, the elastic contacting part may have a spring contact, for example a compression spring.

Bei einer weiteren bevorzugten Ausführungsform kann das elastische Kontaktierungsteil aus einem elektrisch leitenden, elastischen Material ausgebildet sein und der Aufnahmeraum für den Anschlussbolzen der Zündkerze in dem elektrisch leitenden, elastischen Material vorgeformt sein. Wenn das elastische Kontaktierungsteil von dem isolierenden, elastischen Material umschlossen ist, werden zusätzlich mechanische bzw. metallene Kontaktelemente eingespart, und die Herstellung wird weiter vereinfacht.In a further preferred embodiment, the elastic contacting part may be formed of an electrically conductive, elastic material and the receiving space for the connecting bolt of the spark plug may be preformed in the electrically conductive, elastic material. If the elastic contacting part is enclosed by the insulating, elastic material, additional mechanical or metallic contact elements are saved, and the production is further simplified.

Grundsätzlich kann das isolierende, elastische Material ein nichtleitendes Silikon sein. Ebenso kann das elektrisch leitende, elastische Material ein elektrisch leitendes Silikon sein.In principle, the insulating, elastic material may be a non-conductive silicone. Likewise, the electrically conductive, elastic material may be an electrically conductive silicone.

Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstandes gemäß der Erfindung sind der Beschreibung, der Zeichnung und den Patentansprüchen entnehmbar.Further advantages and advantageous embodiments of the article according to the invention are the description, the drawings and the claims removed.

Zeichnungdrawing

Zwei Ausführungsbeispiele eines erfindungsgemäßen Verbindungselements sind in der Zeichnung dargestellt und werden in der nachfolgenden Beschreibung näher erläutert.Two embodiments of a connecting element according to the invention are shown in the drawing and are explained in more detail in the following description.

Es zeigen:

  • Figur 1 in Seitenansicht und im Teilschnitt einen Teilabschnitt einer Ausführungsform eines erfindungsgemäßen, mit einem Federkontakt versehenen Verbindungselements, wobei eine Zündspule im auf eine Zündkerze aufgesteckten Zustand dargestellt ist;
  • Figur 2 in Seitenansicht und im Teilschnitt einen Teilabschnitt des in Figur 1 gezeigten Verbindungselements, wobei ein Zustand dargestellt ist, in dem die Zündspule noch nicht auf die Zündkerze aufgesteckt ist;
  • Figur 3 in Seitenansicht und im Teilschnitt einen Teilabschnitt des in den Figuren 1 und 2 gezeigten Verbindungselements, wobei die Zündspule im auf die Zündkerze aufgesteckten, eine Winkelstellung zu dieser einnehmenden Zustand dargestellt ist; und
  • Figur 4 in Seitenansicht und im Teilschnitt einen Teilabschnitt einer weiteren Ausführungsform eines erfindungsgemäßen Verbindungselements, wobei ein elastisches Kontaktierungselement durch einen Bereich aus elektrisch leitendem Silikon gebildet ist.
Show it:
  • FIG. 1 in side view and in partial section a portion of an embodiment of a connector according to the invention provided with a spring contact, wherein an ignition coil is shown in the plugged onto a spark plug state;
  • FIG. 2 in side view and in partial section a section of the in FIG. 1 shown connecting element, wherein a state is shown in which the ignition coil is not yet attached to the spark plug;
  • FIG. 3 in side view and in partial section a portion of the in the FIGS. 1 and 2 shown connecting element, wherein the ignition coil is plugged into the plugged onto the spark plug, an angular position to this engaging state; and
  • FIG. 4 in side view and in partial section a portion of another embodiment of a connecting element according to the invention, wherein an elastic contacting element is formed by a region of electrically conductive silicone.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Die Figur 1 zeigt in Seitenansicht und im Teilschnitt einen Teilabschnitt einer ersten Ausführungsform eines erfindungsgemäßen, mit einem Federkontakt 28 versehenen Verbindungselements 1, wobei eine Zündspule 12 im auf eine Zündkerze 10 aufgesteckten Zustand dargestellt ist.The FIG. 1 shows in side view and in partial section a portion of a first embodiment of an inventive, provided with a spring contact 28 connecting element 1, wherein an ignition coil 12 is shown plugged into a spark plug 10 state.

Die Zündspule 12 weist ein Zündspulengehäuse 14 auf, das im Wesentlichen vollständig von einem isolierenden, elastischen Silikonmaterial 22 umschlossen ist. Ein angrenzender Teilbereich der Zündkerze 10 ist ebenfalls von dem isolierenden, elastischen Silikonmaterial 22 umschlossen. Die Zündspule 12 wird von dem Silikonmaterial 22 an der Zündkerze 10 festgehalten.The ignition coil 12 has an ignition coil housing 14, which is substantially completely enclosed by an insulating, elastic silicone material 22. An adjacent portion of the spark plug 10 is also enclosed by the insulating, elastic silicone material 22. The ignition coil 12 is held by the silicone material 22 on the spark plug 10.

Das Verbindungselement 1 weist einen in dem Silikonmaterial 22 vorgeformten Aufnahmeraum 16 für einen Anschlussbolzen 18 der Zündkerze 10 auf. Der Anschlussbolzen 18 der Zündkerze 10 ist von dem isolierenden, elastischen Silikonmaterial 22 umschlossen und wird von diesem gehalten. Am Aufnahmeraum 16 ist als Kontaktelement 20 zur elektrischen Kontaktierung des Anschlussbolzens 18 der Zündkerze 10 mit der Zündspule 12 ein Druckfederkontakt 28 vorgesehen.The connecting element 1 has a receiving space 16 preformed in the silicone material 22 for a connecting bolt 18 of the spark plug 10. The terminal bolt 18 of the spark plug 10 is surrounded by and held by the insulating elastic silicone material 22. At the receiving space 16, a compression spring contact 28 is provided as a contact element 20 for making electrical contact with the connecting bolt 18 of the spark plug 10 with the ignition coil 12.

Gemäß einer nicht dargestellten alternativen Ausführungsform kann auch ein Teilbereich des Zündspulengehäuses selbst aus dem isolierenden, elastischen Silikonmaterial gebildet sein.According to an alternative embodiment, not shown, a portion of the ignition coil itself may be formed of the insulating, elastic silicone material.

Die Figur 2 zeigt in Seitenansicht und im Teilschnitt einen Teilabschnitt des in Figur 1 gezeigten Verbindungselements, wobei der Zustand dargestellt ist, in dem die Zündspule 12 noch nicht auf die Zündkerze 10 aufgesteckt ist.The FIG. 2 shows in side view and in partial section a portion of the in FIG. 1 shown connecting element, wherein the state is shown in which the ignition coil 12 is not yet plugged onto the spark plug 10.

Der Aufnahmeraum 16 für den Anschlussbolzen 18 der Zündkerze 10 ist in dem isolierenden, elastischen Silikonmaterial 22 bereits vorgeformt. Zusätzlich ist in dem isolierenden, elastischen Silikonmaterial 22 ein Aufnahmeraum 24 für einen Isolatorbereich 26 der Zündkerze 10 vorgeformt. Der Aufnahmeraum 16 für den Anschlussbolzen 18 der Zündkerze 10 ist gegenüber diesem verjüngt vorgeformt.The receiving space 16 for the connecting bolt 18 of the spark plug 10 is already preformed in the insulating, elastic silicone material 22. In addition, in the insulating elastic silicone material 22, a receiving space 24 for an insulator region 26 of the spark plug 10 is preformed. The receiving space 16 for the connecting bolt 18 of the spark plug 10 is preformed with respect to this tapered.

Beim Aufstecken der Zündspule 12 auf die Zündkerze 10 wird das Silikon im Bereich des Anschlussbolzens 18 und im Isolatorbereich 26 elastisch an die Zündkerzenkontur angeformt. Dies sorgt für eine mechanisch stabile, axiale und radiale Verankerung der Zündspule 10 in einem Kerzenschacht des zugeordneten Verbrennungsmotors.When attaching the ignition coil 12 to the spark plug 10, the silicone in the region of the connecting bolt 18 and in the insulator region 26 is elastically formed on the spark plug contour. This ensures a mechanically stable, axial and radial anchoring of the ignition coil 10 in a plug shaft of the associated internal combustion engine.

Die Figur 3 zeigt in Seitenansicht und im Teilschnitt einen Teilabschnitt des in den Figuren 1 und 2 gezeigten Verbindungselements 1, wobei die Zündspule 12 im auf die Zündkerze 10 aufgesteckten, eine Winkelstellung zu dieser einnehmenden Zustand dargestellt ist. Aufgrund einer vorgegeben Einbausituation im Motor kann eine derartige Winkelstellung aufgrund der ausreichenden Elastizität des Silikonmaterials 22 realisiert werden. Dabei ist die Zündspule 12 jedoch weiterhin fest an der Zündkerze 10 gehalten und aufgrund des Druckfederkontaktes 28 stets sicher kontaktiert.The FIG. 3 shows in side view and in partial section a portion of the in the FIGS. 1 and 2 shown connecting element 1, wherein the ignition coil 12 is shown in the plugged onto the spark plug 10, an angular position to this engaging state. Due to a predetermined installation situation in the engine, such an angular position can be realized due to the sufficient elasticity of the silicone material 22. However, the ignition coil 12 is still firmly held on the spark plug 10 and always contacted safely due to the compression spring contact 28.

Die Figur 4 zeigt in Seitenansicht und im Teilschnitt einen Teilabschnitt einer weiteren Ausfiihrungsform eines erfindungsgemäßen Verbindungselements 1'. Aus Gründen der Übersichtlichkeit sind hier für funktionsgleiche Elemente die gleichen Bezugszeichen wie bei der Ausführung nach Figur 1 bis 3 gewählt. Bei der Ausführungsvariante der Figur 4 ist das elastische Kontaktierungselement 20 durch einen Bereich aus elektrisch leitendem Silikon 30 gebildet. Dabei ist der Aufnahmeraum 16 für den Anschlussbolzen 18 der Zündkerze 10 in dem elektrisch leitenden, elastischen Material 30 vorgeformt. Der Kontaktierungsbereich aus elektrisch leitendem Silikon 30 ist von dem isolierenden, elastischen Material 22 umschlossen.The FIG. 4 shows in side view and in partial section a portion of a further embodiment of a connecting element 1 'according to the invention. For reasons of clarity, the same reference numerals are used here for functionally identical elements as in the embodiment according to FIG Figure 1 to 3 selected. In the embodiment of the FIG. 4 the elastic contacting element 20 is formed by a region of electrically conductive silicone 30. In this case, the receiving space 16 for the connecting bolt 18 of the spark plug 10 in the electrically conductive, elastic material 30 is preformed. The contacting region made of electrically conductive silicone 30 is enclosed by the insulating elastic material 22.

Claims (11)

  1. Connection device for connecting a spark plug (10) and an ignition coil (12) having an ignition coil housing (14), wherein the connection device has a receptacle space (16) for the connecting bolt (18) of the spark plug (10) and a contact element (20) which is arranged at the receptacle space (16) and has the purpose of making electrical contact between the connecting bolt (18) of the spark plug (10) and the ignition coil (12), wherein at least part of the ignition coil housing (14) and at least the adjoining part of the spark plug (10) are surrounded by an insulating elastic material (22), characterized in that the receptacle space (16) for the connecting bolt (18) of the spark plug (10) is preformed so as to taper with respect to said connecting bolt (18) in such a way that the insulating elastic material (22) or an electrically conductive silicone (30) which is surrounded by the insulating elastic material (22) is integrally moulded onto the spark plug contour in an elastic fashion in the region of the connecting bolt (18).
  2. Connection device according to Claim 1, characterized in that the housing (14) of the ignition coil (12) is essentially completely surrounded by the insulating elastic material (22).
  3. Connection device according to one of Claims 1 to 2, characterized in that at least part of the ignition coil housing is formed from an insulating elastic material, and at least the adjoining part of the spark plug is surrounded by the insulating elastic material.
  4. Connection device according to one of Claims 1 to 3, characterized in that a receptacle space (24) for the insulator part (26) of the spark plug (10) is preformed in the insulating elastic material (22), wherein the receptacle space (16) for the connecting bolt (18) of the spark plug (10) is preformed so as to preferably taper with respect to said connecting bolt (18).
  5. Connection device according to one of Claims 1 to 4, characterized in that at least the insulator part (26) of the spark plug (10) which adjoins the connecting bolt (18) is surrounded by the insulating elastic material (22).
  6. Connection device according to one of Claims 1 to 5, characterized in that the contact element (20) has an elastic contact-forming part forming electrical contact between the connecting bolt (18) of the spark plug (10) and the ignition coil (12).
  7. Connection device according to Claim 6, characterized in that the elastic contact-forming part has a spring contact (28).
  8. Connection device according to Claim 6, characterized in that the elastic contact-forming part is formed from an electrically conductive elastic material (30), and the receptacle space (16) for the connecting bolt (18) of the spark plug (10) is preformed in the electrically conductive elastic material (30).
  9. Connection device according to Claim 8, characterized in that the elastic contact-forming part is surrounded by the insulating elastic material (22).
  10. Connection device according to one of Claims 1 to 9, characterized in that the insulating elastic material (22) is a non-conductive silicone.
  11. Connection device according to one of Claims 8 to 10, characterized in that the electrically conductive elastic material (30) is an electrically conductive silicone.
EP05101360A 2004-05-18 2005-02-23 Connection device between a spark plug and an ignition coil Expired - Fee Related EP1598910B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004024540 2004-05-18
DE200410024540 DE102004024540A1 (en) 2004-05-18 2004-05-18 Connecting element for connecting a spark plug and an ignition coil

Publications (2)

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EP1598910A1 EP1598910A1 (en) 2005-11-23
EP1598910B1 true EP1598910B1 (en) 2011-01-05

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Application Number Title Priority Date Filing Date
EP05101360A Expired - Fee Related EP1598910B1 (en) 2004-05-18 2005-02-23 Connection device between a spark plug and an ignition coil

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EP (1) EP1598910B1 (en)
JP (1) JP2005330965A (en)
DE (2) DE102004024540A1 (en)
ES (1) ES2357582T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013137041A1 (en) * 2012-03-12 2013-09-19 日本特殊陶業株式会社 Attachment for plug

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60198713A (en) * 1984-03-22 1985-10-08 Sawafuji Electric Co Ltd Manufacture of ignition coil for internal-combustion engine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1233310B (en) 1989-06-09 1992-03-26 Ubalit S P A METHOD FOR THE CREATION OF INSULATED CONDUCTIVE UNITS ELECTRICALLY CONNECTING ELECTRIC LOADS WITH ELECTRIC SIGNAL GENERATORS AND UNITS OBTAINED BY SUCH METHOD
JP4431266B2 (en) * 2000-11-13 2010-03-10 日本特殊陶業株式会社 Spark plug unit with built-in pressure sensor
JP4237481B2 (en) * 2001-12-27 2009-03-11 ダイヤモンド電機株式会社 Ignition coil for internal combustion engine
US6668810B1 (en) 2002-11-06 2003-12-30 Visteon Global Technologies, Inc. Ignition coil assembly with spark plug connector
DE10259545B3 (en) * 2002-12-19 2004-05-19 Robert Bosch Gmbh High voltage connection for an internal combustion engine spark plug has a spout shrouding the delivery connection of a rubber elastic material screwed to the dome to remain in place when the connection is broken

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60198713A (en) * 1984-03-22 1985-10-08 Sawafuji Electric Co Ltd Manufacture of ignition coil for internal-combustion engine

Also Published As

Publication number Publication date
EP1598910A1 (en) 2005-11-23
JP2005330965A (en) 2005-12-02
ES2357582T3 (en) 2011-04-27
DE502005010784D1 (en) 2011-02-17
DE102004024540A1 (en) 2005-12-15

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