EP1508947A1 - Spark plug for internal combustion engine - Google Patents

Spark plug for internal combustion engine Download PDF

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Publication number
EP1508947A1
EP1508947A1 EP04017767A EP04017767A EP1508947A1 EP 1508947 A1 EP1508947 A1 EP 1508947A1 EP 04017767 A EP04017767 A EP 04017767A EP 04017767 A EP04017767 A EP 04017767A EP 1508947 A1 EP1508947 A1 EP 1508947A1
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EP
European Patent Office
Prior art keywords
spark plug
sealing
plug according
compensating element
cylinder head
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Granted
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EP04017767A
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German (de)
French (fr)
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EP1508947B1 (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
    • H01T13/02—Details
    • H01T13/08—Mounting, fixing or sealing of sparking plugs, e.g. in combustion chamber

Definitions

  • the invention relates to a spark plug for an internal combustion engine with a spark plug body, a screw thread for screwing the spark plug into the cylinder head the internal combustion engine comprises, a central electrode and a ground electrode opposite to the center electrode is isolated.
  • Such a spark plug is used to generate the spark for the combustion process and is with its screw thread in the cylinder head of the internal combustion engine screwed.
  • the screwing in takes place by means of a wrench, which attacks on a hexagon, the spark plug body is provided. It should be noted that the spark plug tightened to a specified tightening torque becomes.
  • spark plug of the type mentioned above create, which are screwed into the cylinder head that can be a certain desired position of the ground electrode is ensured.
  • the spark plug according to the invention is thus a series spark plug with screw thread in standard geometry, which can be screwed into the cylinder head that the ground electrode in a precisely positioned position can be arranged in the combustion chamber.
  • the spark plug illustrated in FIG. 1 is designed to that is, in the manner shown with a Dichtund Compensation element 5 provided that they when screwing in the cylinder head after reaching the specified tightening torque in particular by at least one thread can be rotated further.
  • the sealing and compensating element 5 with a such geometry and / or of such a material manufactured and arranged so that when tightening the spark plug up to the prescribed tightening torque of, for example 30 Nm the yield strength of the sealing and compensating element 5 is not exceeded and this thus up to a limit of elasticity is charged.
  • the spark plug If the spark plug is then turned further, becomes the yield strength of the sealing and compensation element. 5 exceeded and begins the material of the sealing and compensation element to flow.
  • the sealing and Compensating element 5 By the voltage drop can then with a small increase in the force expenditure the sealing and Compensating element 5 will be greatly stretched, so it is possible, with a small increase in force, the means with a small increase in the torque at the Spark plug a long distance, such as a thread turn to cover.
  • This training is a further rotation of the spark plug after reaching the prescribed tightening torque possible until the desired position of the ground electrode is reached is. Theoretically, it is possible to change the spark plug to turn a thread turn further, without the torque significantly increase.
  • the sealing and compensating element 5 is in the in Fig. 1 shown arranged so that it when tightening the spark plug with the prescribed torque between the abutment collar 6 on the spark plug body and the cylinder head is clamped. It is thus between the ubenbund 6 and the screw 7.
  • Fig. 1 which is shown in detail in Fig. 1a, is the sealing and Compensation element 5 annularly formed with a thickness H, that its upper outer surface bears against the abutment collar 6 and its lower outer surface in contact with the cylinder head stands.
  • the sealing and compensating element 5 is the in 1a shown formed centrally with a groove 8, whose cross-sectional area is chosen so that the Load after applying a defined force, the one Tightening torque of 30 Nm, for example, corresponds to Yield strength exceeds and the sealing and compensating element 5 by flowing his material to a small thickness, for example, to a thickness (H-1.25) mm deformed.
  • Fig. 1b shows a preferred embodiment of a Device for determining the position of the ground electrode.
  • This device consists for example of a Bihex training 9 on an outer surface of the hexagon 1, the Location of the ground electrode 4 can be assigned as it is shown in Fig. 1b.
  • the Hexagon 1 of the spark plug is designed so that the spark plug wrench only in a well-defined position fits on the hexagon 1, creating a determination of Relative position between the ground electrode 4 and the spark plug wrench is ensured.
  • the spark plug can change the position of the ground electrode 4 by a corresponding mark on the spark plug key be read. Having in this way the position the ground electrode 4 after tightening with the prescribed Tightening torque has been determined by further rotation of the spark plug, the ground electrode 4 in the desired position to be brought.
  • Fig. 2 shows a side view of a second preferred Embodiment of the spark plug according to the invention, on the left side of Fig. 2, that is, in Fig. 2A the condition is shown that the spark plug after screwing with the prescribed tightening torque, while on the left side, that is, in Fig. 2B the state is shown, the spark plug after further rotation and reaching the desired position of the ground electrode 4 occupies.
  • the sealing and compensating element 5 in the form of a ring a diameter D1 and an inner cone 10 at an angle formed ⁇ and is the plant collar 6 of the spark plug body in turn, also with a corresponding cone provided with the angle ⁇ .
  • the angle ⁇ is preferably between 5 ° and 45 °.
  • the sealing and compensating element 5 is before mounting the candle on the cone of the spark plug body pressed. When screwing in the spark plug is the prescribed Tightening torque of, for example, 30 Nm at the Spark plug, without that the sealing and compensation element. 5 deformed, as shown in Fig. 2A.
  • the sealing and compensating element 5 is such Geometry and of a material with such Strength formed that its elastic limit after the Concern of a defined force that is prescribed Tightening torque corresponds, is exceeded and the Sealing and compensation element 5 after exceeding his Yield point comes into flow, as shown in Fig. 2B is.

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

Abstract

The device has a thread (7) for screwing into the engine's cylinder head, a central electrode (3) and an earth electrode (4) that is electrically isolated relative to the central electrode. The ignition plug is designed so that it can continue to be rotated after reaching the prescribed tightening torque when screwed into the cylinder head.

Description

Die Erfindung betrifft eine Zündkerze für eine Brennkraftmaschine mit einem Zündkerzenkörper, der ein Einschraubgewinde zum Einschrauben der Zündkerze in den Zylinderkopf der Brennkraftmaschine aufweist, einer Mittelektrode und einer Masseelektrode, die gegenüber der Mittelektrode isoliert ist.The invention relates to a spark plug for an internal combustion engine with a spark plug body, a screw thread for screwing the spark plug into the cylinder head the internal combustion engine comprises, a central electrode and a ground electrode opposite to the center electrode is isolated.

Eine derartige Zündkerze dient zum Erzeugen des Zündfunkens für den Verbrennungsvorgang und wird mit ihrem Einschraubgewinde in den Zylinderkopf der Brennkraftmaschine geschraubt.Such a spark plug is used to generate the spark for the combustion process and is with its screw thread in the cylinder head of the internal combustion engine screwed.

Das Einschrauben erfolgt mittels eines Schraubenschlüssels, der an einem Sechskant angreift, der am Zündkerzenkörper vorgesehen ist. Dabei ist zu beachten, dass die Zündkerze bis zu einem vorgeschriebenen Anzugsdrehmoment angezogen wird.The screwing in takes place by means of a wrench, which attacks on a hexagon, the spark plug body is provided. It should be noted that the spark plug tightened to a specified tightening torque becomes.

Bei üblichen Zündkerzen mit dem oben beschriebenen Aufbau besteht allerdings das Problem, dass im voll eingeschraubten Zustand, das heißt bei Erreichen des vorgeschriebenen Anzugsdrehmomentes die Position der Masseelektrode nicht genau bestimmt ist, da sich immer unterschiedliche Einbaupositionen ergeben und die Zündkerze nicht genau in der gewünschten Lage eingeschraubt werden kann. Da sich die Lage der Masseelektrode auf die Qualität des Verbrennungsvorganges auswirkt, ist die Position der Masseelektrode insbesondere bei BDE Motoren, das heißt bei strahlgeführten Motoren von besonderer Bedeutung.In conventional spark plugs with the structure described above However, there is the problem that in fully screwed State, that is, when the prescribed Tightening torque the position of the ground electrode is not exactly determined, as always different Installation positions and the spark plug not exactly in the desired position can be screwed. Since the Position of the ground electrode on the quality of the combustion process In particular, the position of the ground electrode is for BDE engines, ie for spray-guided Engines of particular importance.

Die der Erfindung zugrunde liegende Aufgabe besteht daher darin, eine Zündkerze der eingangs genannten Art zu schaffen, die so in den Zylinderkopf eingeschraubt werden kann, dass eine bestimmte gewünschte Position der Masseelektrode sichergestellt ist.The object underlying the invention is therefore therein, a spark plug of the type mentioned above create, which are screwed into the cylinder head that can be a certain desired position of the ground electrode is ensured.

Diese Aufgabe wird gemäß der Erfindung durch die Ausbildung gelöst, die im Patentanspruch 1 angegeben ist.This object is achieved according to the invention by the training solved, which is specified in claim 1.

Bei der erfindungsgemäßen Zündkerze ist dafür gesorgt, dass eine Drehung auch über das vorgeschriebene Anzugsdrehmoment hinaus möglich ist, so dass über diese zusätzliche Drehung die Mittelelektrode genau in die gewünschte Position gebracht werden kann.In the spark plug according to the invention is ensured that rotation beyond the prescribed tightening torque addition is possible, so that about this additional Turn the center electrode exactly to the desired position can be brought.

Gemäß der Erfindung wird das unter Beibehaltung der derzeitig üblichen Auslegung von Zündkerzen, der Beibehaltung der üblichen Montage von Zündkerzen mittels eines Einschraubgewindes, bei Zündkerzen, die zu den vorhandenen Zylinderkopfgeometrien passend sind, unter Verwendung üblicher Montagetechniken und bei unveränderter Hochspannungsschnittstelle im Fall von Hochspannungszündkerzen erreicht.According to the invention, while maintaining the currently common design of spark plugs, the retention the usual assembly of spark plugs by means of a screw thread, for spark plugs that match the existing cylinder head geometries suitable, using standard Assembly techniques and with unchanged high voltage interface achieved in the case of high voltage spark plugs.

Bei der erfindungsgemäßen Zündkerze handelt es sich somit um eine Serienzündkerze mit Einschraubgewinde in Normgeometrie, die so in den Zylinderkopf geschraubt werden kann, dass die Masseelektrode in einer genau positionierten Lage im Verbrennungsraum angeordnet werden kann. Dabei sind keine Änderungen am Zylinderkopf, an der Steckverbindung des Hochspannungsanschlusses sowie bei der Montage notwendig, da die Zündkerze im Wesentlichen die gleiche Geometrie wie eine genormte bekannte Serienzündkerze hat.The spark plug according to the invention is thus a series spark plug with screw thread in standard geometry, which can be screwed into the cylinder head that the ground electrode in a precisely positioned position can be arranged in the combustion chamber. There are none Changes to the cylinder head, to the connector of the high voltage connection as well as during assembly necessary, as the Spark plug essentially the same geometry as one standardized known series spark plug has.

Besonders bevorzugte Ausführungsbeispiele, Ausgestaltungen und Weiterbildungen der erfindungsgemäßen Zündkerze sind Gegenstand der Patentansprüche 2 bis 11.Particularly preferred embodiments, embodiments and further developments of the spark plug according to the invention are the subject of claims 2 to 11.

Im Folgenden werden anhand der zugehörigen Zeichnung besonders bevorzugte Ausführungsbeispiele der Erfindung näher beschrieben. Es zeigen

  • Fig. 1 eine schematische Seitenansicht eines ersten Ausführungsbeispiels der erfindungsgemäßen Zündkerze,
  • Fig. 1a eine teilweise geschnittene Seitenansicht des Bereiches zwischen dem Anlagebund und dem Einschraubgewinde bei der in Fig. 1 dargestellten Zündkerze,
  • Fig. 1b eine Draufsicht auf den Sechskant der in Fig. 1 dargestellten Zündkerze und
  • Fig. 2 eine Seitenansicht eines zweiten Ausführungsbeispiels der erfindungsgemäßen Zündkerze, wobei Fig. 2A den Zustand bei Erreichen des vorgeschriebenen Anzugsdrehmomentes und Fig. 2B den Zustand nach Erreichen der gewünschten Position der Masseelektrode zeigen.
    • In the following, particularly preferred embodiments of the invention will be described with reference to the accompanying drawings. Show it
  • 1 is a schematic side view of a first embodiment of the spark plug according to the invention,
  • 1a is a partially sectioned side view of the area between the abutment collar and the screw thread in the spark plug shown in Fig. 1,
  • Fig. 1b is a plan view of the hexagon of the spark plug shown in Fig. 1 and
  • Fig. 2 shows a side view of a second embodiment of the spark plug according to the invention, wherein Fig. 2A show the state upon reaching the prescribed tightening torque and Fig. 2B the state after reaching the desired position of the ground electrode.

    • Wie es in Fig. 1 dargestellt ist, besteht eine übliche Zündkerze für eine Brennkraftmaschine aus einem metallischen Zündkerzenkörper mit Sechskant 1, Anlagebund 6 und Schraubgewinde 7, einer Mittelelektrode 3 und einer Masseelektrode 4, sowie einem keramischen Isolator 2, der die Masseelektrode 4 und die Mittelektrode 3 gegeneinander elektrisch isoliert.As shown in Fig. 1, there is a common one Spark plug for an internal combustion engine of a metallic Spark plug body with hexagon 1, abutment collar 6 and screw thread 7, a center electrode 3 and a ground electrode 4, and a ceramic insulator 2, the ground electrode 4 and the center electrode 3 against each other electrically isolated.

    Die in Fig. 1 dargestellte Zündkerze ist so ausgebildet, das heißt in der dargestellten Weise mit einem Dichtund Ausgleichselement 5 versehen, dass sie beim Einschrauben in den Zylinderkopf nach Erreichen des vorgeschriebenen Anzugsdrehmomentes insbesondere um mindestens einen Gewindegang weiter gedreht werden kann. The spark plug illustrated in FIG. 1 is designed to that is, in the manner shown with a Dichtund Compensation element 5 provided that they when screwing in the cylinder head after reaching the specified tightening torque in particular by at least one thread can be rotated further.

    Dazu ist das Dicht- und Ausgleichselement 5 mit einer derartigen Geometrie und/oder aus einem derartigen Werkstoff gefertigt und so angeordnet, dass beim Anziehen der Zündkerze bis zum vorgeschriebenen Anzugsdrehmoment von beispielsweise 30 Nm die Streckgrenze des Dicht- und Ausgleichselementes 5 nicht überschritten wird und dieses somit bis zu einer Elastizitätsgrenze belastet wird.For this purpose, the sealing and compensating element 5 with a such geometry and / or of such a material manufactured and arranged so that when tightening the spark plug up to the prescribed tightening torque of, for example 30 Nm the yield strength of the sealing and compensating element 5 is not exceeded and this thus up to a limit of elasticity is charged.

    Wenn die Zündkerze anschließend weiter gedreht wird, wird die Streckgrenze des Dicht- und Ausgleichselementes 5 überschritten und beginnt der Werkstoff des Dicht- und Ausgleichselementes zu fließen. Durch den Spannungsabfall kann dann mit einer geringen Zunahme des Kraftaufwands das Dichtund Ausgleichselement 5 stark gedehnt werden, so dass es möglich ist, mit einer geringen Kraftaufwandszunahme, das heißt mit einer kleinen Erhöhung des Drehmoments an der Zündkerze eine große Wegstrecke, beispielsweise eine Gewindeumdrehung zurückzulegen.If the spark plug is then turned further, becomes the yield strength of the sealing and compensation element. 5 exceeded and begins the material of the sealing and compensation element to flow. By the voltage drop can then with a small increase in the force expenditure the sealing and Compensating element 5 will be greatly stretched, so it is possible, with a small increase in force, the means with a small increase in the torque at the Spark plug a long distance, such as a thread turn to cover.

    Durch diese Ausbildung ist ein Weiterdrehen der Zündkerze nach Erreichen des vorgeschriebenen Anzugsdrehmomentes möglich, bis die gewünschte Position der Masseelektrode erreicht ist. Theoretisch ist es möglich, die Zündkerze um eine Gewindeumdrehung weiter zu drehen, ohne das Drehmoment signifikant zu erhöhen.This training is a further rotation of the spark plug after reaching the prescribed tightening torque possible until the desired position of the ground electrode is reached is. Theoretically, it is possible to change the spark plug to turn a thread turn further, without the torque significantly increase.

    Bei einem praktischen Ausführungsbeispiel bedeutet das, dass die Zündkerze mit einem Drehmoment von 30 Nm angezogen wird und dass ein Weiterdrehen der Zündkerze um eine Gewindeumdrehung (bei M12 und M14 ist dieses gleich 1,25 mm) mit einem zusätzlichen Kraftaufwand in der Größenordnung von 10 bis 15 Nm möglich ist.In a practical embodiment, this means that the spark plug is tightened with a torque of 30 Nm and that further rotation of the spark plug by a thread turn (in M12 and M14 this is equal to 1.25 mm) with an additional effort of the order of 10 up to 15 Nm is possible.

    Das Dicht- und Ausgleichselement 5 ist dazu in der in Fig. 1 dargestellten Weise so angeordnet, dass es beim Anziehen der Zündkerze mit dem vorgeschriebenen Drehmoment zwischen dem Anlagebund 6 am Zündkerzenkörper und dem Zylinderkopf eingespannt ist. Es befindet sich somit zwischen dem Anlagebund 6 und dem Einschraubgewinde 7.The sealing and compensating element 5 is in the in Fig. 1 shown arranged so that it when tightening the spark plug with the prescribed torque between the abutment collar 6 on the spark plug body and the cylinder head is clamped. It is thus between the Anlagebund 6 and the screw 7.

    Bei dem in Fig. 1 dargestellten Ausführungsbeispiel, das im Einzelnen in Fig. 1a dargestellt ist, ist das Dichtund Ausgleichselement 5 ringförmig mit einer Dicke H so ausgebildet, dass seine obere Außenfläche am Anlagebund 6 anliegt und seine untere Außenfläche in Kontakt mit dem Zylinderkopf steht. Das Dicht- und Ausgleichselement 5 ist der in Fig. 1a dargestellten Weise mittig mit einer Rille 8 ausgebildet, deren Querschnittsfläche so gewählt ist, dass die Belastung nach Anlegen einer definierten Kraft, die einem Anzugsdrehmoment von 30 Nm beispielsweise entspricht, die Streckgrenze überschreitet und sich das Dicht- und Ausgleichselement 5 durch Fließen seines Werkstoffes auf eine geringe Dicke beispielsweise auf eine Dicke (H-1,25) mm verformt.In the embodiment shown in Fig. 1, which is shown in detail in Fig. 1a, is the sealing and Compensation element 5 annularly formed with a thickness H, that its upper outer surface bears against the abutment collar 6 and its lower outer surface in contact with the cylinder head stands. The sealing and compensating element 5 is the in 1a shown formed centrally with a groove 8, whose cross-sectional area is chosen so that the Load after applying a defined force, the one Tightening torque of 30 Nm, for example, corresponds to Yield strength exceeds and the sealing and compensating element 5 by flowing his material to a small thickness, for example, to a thickness (H-1.25) mm deformed.

    Fig. 1b zeigt ein bevorzugtes Ausführungsbeispiel einer Einrichtung zur Bestimmung der Position der Masseelektrode. Diese Einrichtung besteht beispielsweise aus einer Bihex-Ausbildung 9 an einer Außenfläche des Sechskantes 1, der die Lage der Masseelektrode 4 so zugeordnet werden kann, wie es in Fig. 1b dargestellt ist.Fig. 1b shows a preferred embodiment of a Device for determining the position of the ground electrode. This device consists for example of a Bihex training 9 on an outer surface of the hexagon 1, the Location of the ground electrode 4 can be assigned as it is shown in Fig. 1b.

    Zum Erkennen der Lage der Masseelektrode ist somit der Sechskant 1 der Zündkerze so ausgebildet, dass der Zündkerzenschraubenschlüssel nur in einer genau definierten Position auf den Sechskant 1 passt, wodurch eine Bestimmung der relativen Lage zwischen der Masseelektrode 4 und dem Zündkerzenschlüssel sichergestellt ist. Beim Einschrauben und Festziehen der Zündkerze kann die Position der Masseelektrode 4 durch eine entsprechende Markierung am Zündkerzenschlüssel abgelesen werden. Nachdem in dieser Weise die Position der Masseelektrode 4 nach dem Anziehen mit dem vorgeschriebenen Anzugsdrehmoment bestimmt worden ist, kann durch ein Weiterdrehen der Zündkerze die Masseelektrode 4 in die gewünschte Position gebracht werden.For detecting the position of the ground electrode is thus the Hexagon 1 of the spark plug is designed so that the spark plug wrench only in a well-defined position fits on the hexagon 1, creating a determination of Relative position between the ground electrode 4 and the spark plug wrench is ensured. When screwing in and Tightening the spark plug can change the position of the ground electrode 4 by a corresponding mark on the spark plug key be read. Having in this way the position the ground electrode 4 after tightening with the prescribed Tightening torque has been determined by further rotation of the spark plug, the ground electrode 4 in the desired position to be brought.

    Fig. 2 zeigt in einer Seitenansicht ein zweites bevorzugtes Ausführungsbeispiel der erfindungsgemäße Zündkerze, wobei auf der linken Seite von Fig. 2, das heißt in Fig. 2A der Zustand dargestellt ist, den die Zündkerze nach dem Einschrauben mit dem vorgeschriebenen Anzugsdrehmoment einnimmt, während auf der linken Seite, das heißt in Fig. 2B der Zustand dargestellt ist, den die Zündkerze nach dem Weiterdrehen und Erreichen der gewünschten Position der Masseelektrode 4 einnimmt.Fig. 2 shows a side view of a second preferred Embodiment of the spark plug according to the invention, on the left side of Fig. 2, that is, in Fig. 2A the condition is shown that the spark plug after screwing with the prescribed tightening torque, while on the left side, that is, in Fig. 2B the state is shown, the spark plug after further rotation and reaching the desired position of the ground electrode 4 occupies.

    Bei dem in Fig. 2 dargestellten Ausführungsbeispiel ist das Dicht- und Ausgleichselement 5 in Form eines Ringes mit einem Durchmesser D1 und einem Innenkonus 10 mit einem Winkel α ausgebildet und ist der Anlagebund 6 des Zündkerzenkörpers seinerseits ebenfalls mit einem entsprechenden Konus mit dem Winkel α versehen. Der Winkel α liegt vorzugsweise zwischen 5° und 45°. Das Dicht- und Ausgleichselement 5 ist vor der Kerzenmontage auf den Konus des Zündkerzenkörpers gepresst. Beim Einschrauben der Zündkerze liegt das vorgeschriebene Anzugsdrehmoment von beispielsweise 30 Nm an der Zündkerze, ohne dass sich das Dicht- und Ausgleichselement 5 verformt, wie es in Fig. 2A dargestellt ist.In the embodiment shown in Fig. 2 is the sealing and compensating element 5 in the form of a ring a diameter D1 and an inner cone 10 at an angle formed α and is the plant collar 6 of the spark plug body in turn, also with a corresponding cone provided with the angle α. The angle α is preferably between 5 ° and 45 °. The sealing and compensating element 5 is before mounting the candle on the cone of the spark plug body pressed. When screwing in the spark plug is the prescribed Tightening torque of, for example, 30 Nm at the Spark plug, without that the sealing and compensation element. 5 deformed, as shown in Fig. 2A.

    Das Dicht- und Ausgleichselement 5 ist mit einer derartigen Geometrie und aus einem Werkstoff mit einer derartigen Festigkeit gebildet, dass seine Elastizitätsgrenze nach dem Anliegen einer definierten Kraft, die dem vorgeschriebenen Anzugsdrehmoment entspricht, überschritten wird und das Dicht- und Ausgleichselement 5 nach Überschreiten seiner Streckgrenze ins Fließen kommt, wie es in Fig. 2B dargestellt ist. Durch ein Weiterdrehen der Zündkerze mit einem geringen zusätzlichen Kraftaufwand von 10 bis 15 Nm kann dann die gewünschte Positionierung der Masseelektrode 4 erreicht werden.The sealing and compensating element 5 is such Geometry and of a material with such Strength formed that its elastic limit after the Concern of a defined force that is prescribed Tightening torque corresponds, is exceeded and the Sealing and compensation element 5 after exceeding his Yield point comes into flow, as shown in Fig. 2B is. By further turning the spark plug with a low additional effort of 10 to 15 Nm can then reaches the desired positioning of the ground electrode 4 become.

    Bei dieser Verformung des Dicht- und Ausgleichselementes 5 vergrößert sich sein Durchmesser auf D2, was bei der geometrischen Auslegung der Zündkerze zu berücksichtigen ist, damit ein Festsitzen in der Zylinderkopfbohrung ausgeschlossen wird.In this deformation of the sealing and compensation element 5, its diameter increases to D2, which in the geometric design of the spark plug to consider is, so that a stuck in the cylinder head bore excluded becomes.

    Das Anbringen eines standardmäßigen Zündkerzenaußendichtrings ist möglich und kann zur Verbesserung der Dichtheit zwischen Zylinderkopfgewinde und Zündkerzenkörper beitragen. Attaching a standard spark plug seal is possible and can improve the tightness contribute between cylinder head thread and spark plug body.

    Claims (11)

    Zündkerze für eine Brennkraftmaschine mit einem Zündkerzenkörper, der ein Einschraubgewinde zum Einschrauben in den Zylinderkopf der Brennkraftmaschine aufweist, einer Mittelektrode und einer Masseelektrode, die gegenüber der Mittelelektrode elektrisch isoliert ist, dadurch gekennzeichnet, dass die Zündkerze so ausgebildet ist, dass sie beim Einschrauben in den Zylinderkopf nach Erreichen des vorgeschriebenen Anzugsdrehmomentes weitergedreht werden kann.A spark plug for an internal combustion engine having a spark plug body having a screw thread for screwing into the cylinder head of the internal combustion engine, a center electrode and a ground electrode, which is electrically insulated from the center electrode, characterized in that the spark plug is formed so that when screwed into the Cylinder head can be further rotated after reaching the prescribed tightening torque. Zündkerze nach Anspruch 1, dadurch gekennzeichnet, dass sie so ausgebildet ist, dass sie um wenigstens einen Gewindegang weitergedreht werden kann.Spark plug according to claim 1, characterized in that it is designed so that it can be further rotated by at least one thread. Zündkerze nach Anspruch 1 oder 2, gekennzeichnet durch ein verformbares Dicht- und Ausgleichselement (5), dass so angeordnet ist, dass es beim Einschrauben der Zündkerze mit dem Anzugsdrehmoment belastet wird.Spark plug according to claim 1 or 2, characterized by a deformable sealing and compensating element (5), which is arranged so that it is loaded when screwing the spark plug with the tightening torque. Zündkerze nach Anspruch 3, dadurch gekennzeichnet, dass das Dicht- und Ausgleichselement (5) beim Einschrauben der Zündkerze zwischen einem Anlagebund (6) am Zündkerzenkörper und dem Zylinderkopf zur Anlage kommt.Spark plug according to Claim 3, characterized in that the sealing and compensating element (5) comes into contact with the spark plug body and the cylinder head when the spark plug is screwed in between an abutment collar (6). Zündkerze nach einem der vorhergehenden Ansprüche, gekennzeichnet durch einen Außendichtring am Zündkerzenkörper.Spark plug according to one of the preceding claims, characterized by an outer sealing ring on the spark plug body. Zündkerze nach Anspruch 3, 4 oder 5, dadurch gekennzeichnet, dass das Dicht- und Ausgleichselement (5) mit einer derartigen Geometrie und aus einem derartigen Werkstoff gebildet ist, dass es beim Anliegen des vorgeschriebenen Anzugsdrehmomentes bis zu seiner Elastizitätsgrenze belastet ist und bei einem Weiterdrehen der Zündkerze sein Material oberhalb der Streckgrenze zum Fließen kommt.Spark plug according to claim 3, 4 or 5, characterized in that the sealing and compensating element (5) is formed with such a geometry and of such a material that it is loaded when applying the prescribed tightening torque up to its elastic limit and further rotation the spark plug its material above the yield strength comes to flow. Zündkerze nach Anspruch 6, dadurch gekennzeichnet, dass das Dicht- und Ausgleichselement (5) ringförmig ausgebildet ist.Spark plug according to claim 6, characterized in that the sealing and compensating element (5) is annular. Zündkerze nach Anspruch 6, dadurch gekennzeichnet, dass in der Außenfläche des ringförmigen Dicht- und Ausgleichselementes (5) mittig eine Rille (8) ausgebildet ist.Spark plug according to Claim 6, characterized in that a groove (8) is formed centrally in the outer surface of the annular sealing and compensating element (5). Zündkerze nach Anspruch 6, dadurch gekennzeichnet, dass das ringförmige Dicht- und Ausgleichselement (5) an seiner Innenfläche einen Konus (10) aufweist, mit dem es auf eine entsprechend konisch ausgebildete Außenfläche des Zündkerzenkörpers gepresst ist.Spark plug according to claim 6, characterized in that the annular sealing and compensating element (5) has on its inner surface a cone (10), with which it is pressed onto a correspondingly conical outer surface of the spark plug body. Zündkerze nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Sechskant (1) am Zündkerzenkörper so ausgebildet ist, dass die Masseelektrode (4) beim Aufsetzen des Montagewerkzeuges für die Zündkerze auf den Sechskant (1) eine genaue bestimmte und erkennbare Position zum Montagewerkzeug hat.Spark plug according to one of the preceding claims, characterized in that a hexagon (1) on the spark plug body is formed so that the ground electrode (4) when placing the assembly tool for the spark plug on the hexagon (1) has a precise specific and recognizable position to the assembly tool , Zündkerze nach Anspruch 10, dadurch gekennzeichnet, dass der Sechskant (1) an einer Sechskanntfläche eine Bihex-Ausbildung (9) hat.Spark plug according to claim 10, characterized in that the hexagon (1) has a Bihex formation (9) on a hexagonal surface.
    EP04017767A 2003-08-22 2004-07-27 Spark plug for internal combustion engine Revoked EP1508947B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10338743 2003-08-22
    DE10338743A DE10338743B4 (en) 2003-08-22 2003-08-22 Spark plug for an internal combustion engine

    Publications (2)

    Publication Number Publication Date
    EP1508947A1 true EP1508947A1 (en) 2005-02-23
    EP1508947B1 EP1508947B1 (en) 2011-09-14

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    ID=34042250

    Family Applications (1)

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    EP04017767A Revoked EP1508947B1 (en) 2003-08-22 2004-07-27 Spark plug for internal combustion engine

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    EP (1) EP1508947B1 (en)
    AT (1) ATE524860T1 (en)
    DE (1) DE10338743B4 (en)

    Cited By (3)

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    EP1919047A1 (en) * 2006-10-30 2008-05-07 Ngk Spark Plug Co., Ltd. Spark plug for internal combustion engine and method of manufacturing the same
    DE102014105694A1 (en) 2014-04-23 2015-10-29 Federal-Mogul Ignition Gmbh Sealing ring for a spark plug of an internal combustion engine, spark plug and internal combustion engine
    US9322630B2 (en) 2012-10-24 2016-04-26 Ford Global Technologies, Llc Method for producing and checking an internal thread

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    DE102011015183B4 (en) * 2011-03-26 2014-12-11 Federal-Mogul Ignition Gmbh Spark plug and method of assembling a spark plug
    DE102012009506A1 (en) 2011-05-27 2012-11-29 Volkswagen Aktiengesellschaft Cylinder of an internal combustion engine for a vehicle and corresponding manufacturing method, means for producing the cylinder, spark plug, internal combustion engine and vehicle
    DE102017109844B4 (en) 2017-05-08 2019-08-14 Federal-Mogul Ignition Gmbh A method of manufacturing a spark plug assembly and spark plug assembly
    GB2602289B (en) 2020-12-22 2023-09-27 Caterpillar Energy Solutions Gmbh Improved contact surface of the spark plug jacket
    DE102022121764B4 (en) 2022-08-29 2024-06-27 Volkswagen Aktiengesellschaft Method for mounting spark plugs on a cylinder head of an internal combustion engine

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    EP1059714A1 (en) * 1999-06-07 2000-12-13 Peugeot Citroen Automobiles SA Spark plug for internal combustion engine

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    Cited By (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1919047A1 (en) * 2006-10-30 2008-05-07 Ngk Spark Plug Co., Ltd. Spark plug for internal combustion engine and method of manufacturing the same
    US7477006B2 (en) 2006-10-30 2009-01-13 Ngk Spark Plug Co., Ltd. Spark plug for internal combustion engine and method of manufacturing the same
    US9322630B2 (en) 2012-10-24 2016-04-26 Ford Global Technologies, Llc Method for producing and checking an internal thread
    DE102014105694A1 (en) 2014-04-23 2015-10-29 Federal-Mogul Ignition Gmbh Sealing ring for a spark plug of an internal combustion engine, spark plug and internal combustion engine
    US9787063B2 (en) 2014-04-23 2017-10-10 Federal-Mogul Ignition Gmbh Sealing ring for a spark plug of an internal combustion engine, spark plug and internal combustion engine

    Also Published As

    Publication number Publication date
    DE10338743A1 (en) 2005-03-17
    DE10338743B4 (en) 2005-07-21
    EP1508947B1 (en) 2011-09-14
    ATE524860T1 (en) 2011-09-15

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