EP1557849A2 - Ignition coil for an internal combustion engine - Google Patents

Ignition coil for an internal combustion engine Download PDF

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Publication number
EP1557849A2
EP1557849A2 EP05000165A EP05000165A EP1557849A2 EP 1557849 A2 EP1557849 A2 EP 1557849A2 EP 05000165 A EP05000165 A EP 05000165A EP 05000165 A EP05000165 A EP 05000165A EP 1557849 A2 EP1557849 A2 EP 1557849A2
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EP
European Patent Office
Prior art keywords
winding
internal combustion
combustion engine
ignition coil
sleeve
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Granted
Application number
EP05000165A
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German (de)
French (fr)
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EP1557849B8 (en
EP1557849A3 (en
EP1557849B1 (en
Inventor
Friedhelm Rosemann
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Pulse Electronics GmbH
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era AG
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Publication of EP1557849B1 publication Critical patent/EP1557849B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/361—Electric or magnetic shields or screens made of combinations of electrically conductive material and ferromagnetic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F2027/348—Preventing eddy currents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens

Definitions

  • the invention relates to an ignition coil for a Internal combustion engine with a a primary winding carrying cylindrical primary coil bobbin, a Low voltage connection area for connecting the Primary winding to a low voltage, one with the Primary winding inductively coupled secondary winding, for Providing a high voltage for a spark plug the Internal combustion engine, wherein the secondary winding of a surrounded concentrically by the primary bobbin Secondary bobbin is worn, one High voltage terminal area in which the Secondary winding contacted the spark plug, the Secondary bobbin a cylindrical magnetic Core encloses and primary bobbin and Secondary coil body shared by an electric and magnetically conductive sleeve are surrounded, wherein the Sleeve has a continuous longitudinal slot, as well a process for their preparation.
  • An ignition coil of this type is known from DE 100 57 567 known.
  • the generic ignition coil is a so-called "bar coil for ignition systems of internal combustion engines", which has an elongated shape so that they are in the available limited space in the engine block the internal combustion engine can be arranged.
  • Low voltage connection area is located at the Primary winding to a primary voltage, which due to the inductive coupling between primary and Secondary winding as highly transformed voltage at High voltage terminal area of the secondary winding to Is available and applied there the spark plug.
  • the known ignition coil is by primary and Secondary coil and the cylindrical magnetic core and the magnetically conductive sleeve a magnetic Circle formed. To avoid eddy current losses in the also electrically conductive sleeve wears this a continuous longitudinal slot, so that induced electrical eddy currents are minimized.
  • ignition coils In known from practice ignition coils is doing the Return of the winding supply line in that the Primary coil body has inside a groove, within which the supply line is guided. It has however, it proved to be disadvantageous that this groove on the one hand a mechanical weakening point represents the ignition coil, so that a predetermined breaking point is preprogrammed, and that on the other hand that the Supply line surrounding electromagnetic field itself disadvantageous to the strength properties of the ignition coil effect.
  • Another solution known from practice provides that the electrical feedback through a flat conductor, for example in the form of a film, is executed, which extends along the cylindrical Surface of the primary bobbin extends. These too Solution is not in terms of mechanical strength satisfactory and manufacturability expensive and risky.
  • the invention is based on the object an ignition coil of the type mentioned above to develop that in the case of an odd number Layer number of the primary winding improved mechanical and electrical reliability is achieved.
  • n 1,2,3, ... layers existing Primary winding 1 from the low voltage terminal Removes exiting winding lead in such a way the extent of the longitudinal slot of the sleeve is that they are at least partially within the outer circumference of the sleeve extends.
  • the invention is characterized in that the return of the winding supply line takes place through a space, which must be present in any case constructively, so that no additional design measures, such as the production of a groove, are required. Thus, no additional mechanical predetermined breaking points can arise. Seen electrically, the region of the longitudinal slot for the return of the supply line is a conceivable favorable location, since it is so far outside the electrically active region of the primary and secondary coil that there is no longer any influence on the electromagnetic properties. On the other hand, the return of the supply line does not require an increase in the volume of the coil, since the diameter of the lead, possibly including its insulation, is such that it is always located within the outer periphery of the entire ignition coil, which is limited by the outer circumference of the sleeve ,
  • the procedural aspect of the invention has the particular advantage on that the fixation of the supply line especially within the area of the longitudinal slot is simply possible.
  • Fig. 1 shows a longitudinal section through a Embodiment of an ignition coil according to the invention, the one in their upper part Low-voltage terminal 10, at which the Ignition coil with the required low voltage is charged. In its lower area, the Ignition coil on a high voltage terminal area 5, in the one Vietnamesesabsacrificing.mit a (not shown) spark plug opens.
  • the ignition coil has a cylindrical design.
  • a cylindrical magnetic Core 6 formed of layered magnetic Sheets, in particular iron silicon sheets exists. Single magnetic sheets of different widths are so stacked and under insulation of the individual sheets against each other to the core 6 with approximately circular Contour connected.
  • the core 6 is of one Secondary coil body 4 surrounded, which a Secondary winding 3 carries, which electrically with the High voltage connection region 5 is connected.
  • the secondary bobbin 4 is concentric with a Surround primary coil body 2, which is a primary winding 1 carries.
  • the primary winding 1 is shown in FIG Embodiment, a three-layer winding.
  • the Coil unit is surrounded by a sleeve 7, which consists of an electrically conductive and simultaneously magnetically conductive material, in particular Iron silicon sheet, consists.
  • the sleeve 7 through two mutually isolated rollformed ones formed magnetic sheets.
  • the outer circumference of the sleeve 7 simultaneously forms the outer periphery of described ignition coil.
  • the sleeve 7, the primary winding 1, the secondary winding 3 and the core 6 form one magnetic circuit for generating the required Ignition energy, which is applied to the spark plug.
  • this is a continuous longitudinal slot 8 provided.
  • Winding lead 9 is over a Insulation layer fixed within the slot area, by the winding lead 9 in accordance with appropriate Embedding material is fixed.
  • the embedding takes place preferably by means of epoxy resin.
  • the between the leading out of the ends of the Secondary winding 3 and the high voltage terminal 5 trained cylindrical area serves for a Housing a serving as a suppression element Resistance 11 and on the other to accommodate a Diode 12, through which a rectification of the in the Spark plug flowing current is achieved to that effect that the negative payload for the ignition passed through, the positive disturbing impulse however is suppressed.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

A primary winding comprises (2n-1) layers, n being 1, 2, 3..., i.e. the number of layers is odd. The winding supply wire (9) remote from the low voltage connection (10) is led within the outer region of the casing (7), along the extent of the long slot (8) : An independent claim is included for the corresponding method of manufacture.

Description

Die Erfindung betrifft eine Zündspule für eine Brennkraftmaschine mit einem eine Primärwicklung tragenden zylindrischen Primärspulenkörper, einem Niederspannungsanschlussbereich zum Anschließen der Primärwicklung an eine Niederspannung, einer mit der Primärwicklung induktiv gekoppelten Sekundärwicklung, zum Bereitstellen einer Hochspannung für eine Zündkerze der Brennkraftmaschine, wobei die Sekundärwicklung von einem vom Primärspulenkörper konzentrisch umgebenen Sekundärspulenkörper getragen wird, einem Hochspannungsanschlussbereich, in welchem die Sekundärwicklung die Zündkerze kontaktiert, wobei der Sekundärspulenkörper einen zylindrischen magnetischen Kern umschließt und Primärspulenkörper und Sekundärspulenkörper gemeinsam von einer elektrisch und magnetisch leitfähigen Hülse umgeben sind, wobei die Hülse einen durchgehenden Längsschlitz aufweist, sowie ein Verfahren zu deren Herstellung.The invention relates to an ignition coil for a Internal combustion engine with a a primary winding carrying cylindrical primary coil bobbin, a Low voltage connection area for connecting the Primary winding to a low voltage, one with the Primary winding inductively coupled secondary winding, for Providing a high voltage for a spark plug the Internal combustion engine, wherein the secondary winding of a surrounded concentrically by the primary bobbin Secondary bobbin is worn, one High voltage terminal area in which the Secondary winding contacted the spark plug, the Secondary bobbin a cylindrical magnetic Core encloses and primary bobbin and Secondary coil body shared by an electric and magnetically conductive sleeve are surrounded, wherein the Sleeve has a continuous longitudinal slot, as well a process for their preparation.

Eine Zündspule dieser Art ist aus der DE 100 57 567 bekannt.An ignition coil of this type is known from DE 100 57 567 known.

Bei der gattungsgemäßen Zündspule handelt es sich um eine sog. "Stabspule für Zündanlagen von Brennkraftmaschinen", welche eine längliche Bauform aufweist, damit sie in dem zur Verfügung stehenden eng begrenzten Raum im Motorblock der Brennkraftmaschine angeordnet sein kann. Über dem Niederspannungsanschlussbereich liegt an der Primärwicklung eine Primärspannung an, welche aufgrund der induktiven Kopplung zwischen Primär- und Sekundärwicklung als hochtransformierte Spannung am Hochspannungsanschlussbereich der Sekundärwicklung zur Verfügung steht und dort die Zündkerze beaufschlagt. Bei der bekannten Zündspule wird durch Primär- und Sekundärspule sowie den zylindrischen magnetischen Kern und die magnetisch leitfähige Hülse ein magnetischer Kreis gebildet. Zur Vermeidung von Wirbelstromverlusten in der auch elektrisch leitfähigen Hülse trägt diese einen durchgehenden Längsschlitz, so dass induzierte elektrische Wirbelströme minimiert werden.In the generic ignition coil is a so-called "bar coil for ignition systems of internal combustion engines", which has an elongated shape so that they are in the available limited space in the engine block the internal combustion engine can be arranged. Above that Low voltage connection area is located at the Primary winding to a primary voltage, which due to the inductive coupling between primary and Secondary winding as highly transformed voltage at High voltage terminal area of the secondary winding to Is available and applied there the spark plug. at the known ignition coil is by primary and Secondary coil and the cylindrical magnetic core and the magnetically conductive sleeve a magnetic Circle formed. To avoid eddy current losses in the also electrically conductive sleeve wears this a continuous longitudinal slot, so that induced electrical eddy currents are minimized.

Aufgrund der gestellten Anforderungen an die Zündspule ist es erforderlich, die Primärwicklung auf dem die Sekundärwicklung umgebenden Primärspulenkörper mehrlagig auszuführen. Bei geradzahliger Lagenzahl ragen beide Zuleitungen der Primärwicklung am selben Ende des Primärspulenkörpers hinaus, so dass dort direkt ein Anschluss an die Niederspannungszuleitung erfolgen kann. Ist jedoch die Lagenzahl ungeradzahlig, ragen die Wicklungszuleitungen an entgegengesetzten Enden des Primärspulenkörpers hinaus, d.h. eine der beiden Wicklungszuleitungen muss auf die gegenüber liegende Seite zum Niederspannungsanschlussbereich zurückgeführt werden. In der Praxis ist eine Primärwicklung mit ungeradzahliger Lagenzahl, z.B. drei, gefordert. Aufgrund der erforderlichen elektrischen Kennwerte der Zündspule reicht nämlich eine zweilagige Wicklung häufig nicht aus, während eine vierlagige Primärwicklung zu einem zu großen Durchmesser der Spule führen würde. Due to the requirements of the ignition coil It is necessary to use the primary winding on the Secondary winding surrounding primary bobbin multilayer perform. With even number of layers both stand out Supply lines of the primary winding at the same end of the Primary bobbin addition, so that there directly Connection to the low voltage supply can be made. However, if the number of layers is odd, the stand Winding leads at opposite ends of the Primary bobbin, i. one of the two Winding leads must be on the opposite Returned to the low voltage connection area become. In practice, a primary winding with odd number of layers, e.g. three, demanded. by virtue of the required electrical characteristics of the ignition coil A two-layer winding is often not enough, while a four-ply primary winding is too large Diameter of the coil would result.

Bei aus der Praxis bekannten Zündspulen erfolgt dabei die Rückführung der Wicklungszuleitung dadurch, dass der Primärspulenkörper innenseitig eine Nut aufweist, innerhalb der die Zuleitung geführt ist. Es hat sich dabei allerdings als nachteilig herausgestellt, dass diese Nut einerseits eine mechanische Schwächungsstelle für die Zündspule darstellt, so dass eine Sollbruchstelle vorprogrammiert ist, und dass andererseits das die Zuleitung umgebende elektromagnetische Feld sich nachteilig auf die Festigkeitseigenschaften der Zündspule auswirkt. Eine andere aus der Praxis bekannte Lösung sieht vor, dass die elektrische Rückführung durch einen flächigen Leiter, beispielsweise in Form einer Folie, ausgeführt ist, die sich entlang der zylindrischen Oberfläche des Primärspulenkörpers erstreckt. Auch diese Lösung ist hinsichtlich der mechanischen Festigkeit nicht zufriedenstellend und hinsichtlich der Herstellbarkeit teuer und risikobehaftet.In known from practice ignition coils is doing the Return of the winding supply line in that the Primary coil body has inside a groove, within which the supply line is guided. It has However, it proved to be disadvantageous that this groove on the one hand a mechanical weakening point represents the ignition coil, so that a predetermined breaking point is preprogrammed, and that on the other hand that the Supply line surrounding electromagnetic field itself disadvantageous to the strength properties of the ignition coil effect. Another solution known from practice provides that the electrical feedback through a flat conductor, for example in the form of a film, is executed, which extends along the cylindrical Surface of the primary bobbin extends. These too Solution is not in terms of mechanical strength satisfactory and manufacturability expensive and risky.

Davon ausgehend liegt der Erfindung die Aufgabe zugrunde, eine Zündspule der eingangs genannten Art dahingehend weiterzuentwickeln, dass im Falle einer ungeradzahligen Lagenzahl der Primärwicklung eine verbesserte mechanische und elektrische Zuverlässigkeit erreicht wird.On this basis, the invention is based on the object an ignition coil of the type mentioned above to develop that in the case of an odd number Layer number of the primary winding improved mechanical and electrical reliability is achieved.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass bei einer aus (2n-1), n= 1,2,3, ... Lagen bestehenden Primärwicklung 1 die vom Niederspannungsanschluss entfernt austretende Wicklungszuleitung derart entlang des Erstreckungsbereichs des Längsschlitzes der Hülse geführt ist, dass sie zumindest teilweise innerhalb des äußeren Umkreises der Hülse verläuft. This object is achieved in that at one of (2n-1), n = 1,2,3, ... layers existing Primary winding 1 from the low voltage terminal Removes exiting winding lead in such a way the extent of the longitudinal slot of the sleeve is that they are at least partially within the outer circumference of the sleeve extends.

Die Erfindung zeichnet sich dadurch aus, dass die Rückführung der Wicklungszuleitung durch einen Raum erfolgt, welcher konstruktiv ohnehin vorhanden sein muss, so dass keine zusätzlichen konstruktiven Maßnahmen, wie beispielsweise das Herstellen einer Nut, erforderlich sind. Somit können keine zusätzlichen mechanischen Sollbruchstellen entstehen. Elektrisch betrachtet ist der Bereich des Längsschlitzes für die Rückführung der Zuleitung ein denkbar günstiger Ort, da dieser soweit außerhalb des elektrisch aktiven Bereichs der Primär- und Sekundärspule ist, dass keine Beeinflussung der elektromagnetischen Eigenschaften mehr erfolgt.
Andererseits verlangt die Rückführung der Zuleitung keine Vergrößerung des Bauvolumens der Spule, da der Durchmesser der Zuleitung, eventuell einschließlich ihrer Isolation, so bemessen ist, dass er immer innerhalb der äußeren Peripherie der gesamten Zündspule angeordnet ist, die durch den äußeren Umkreis der Hülse begrenzt ist.The invention is characterized in that the return of the winding supply line takes place through a space, which must be present in any case constructively, so that no additional design measures, such as the production of a groove, are required. Thus, no additional mechanical predetermined breaking points can arise. Seen electrically, the region of the longitudinal slot for the return of the supply line is a conceivable favorable location, since it is so far outside the electrically active region of the primary and secondary coil that there is no longer any influence on the electromagnetic properties.
On the other hand, the return of the supply line does not require an increase in the volume of the coil, since the diameter of the lead, possibly including its insulation, is such that it is always located within the outer periphery of the entire ignition coil, which is limited by the outer circumference of the sleeve ,

Der verfahrensbezogene Aspekt der Erfindung weist den besonderen Vorteil auf, dass die Fixierung der Zuleitung innerhalb des Bereichs des Längsschlitzes besonders einfach möglich ist.The procedural aspect of the invention has the particular advantage on that the fixation of the supply line especially within the area of the longitudinal slot is simply possible.

Weitere bevorzugte Ausführungsformen der Erfindung gehen aus den Unteransprüchen hervor.Further preferred embodiments of the invention go from the dependent claims.

Die Erfindung wird im Folgenden anhand eines Ausführungsbeispiels näher erläutert. Dabei zeigen:

Fig. 1
einen Längsschnitt durch eine erfindungsgemäße. Zündspule nach dem Ausführungsbeispiel;
Fig. 2
einen Schnitt entlang der Linie A-A in Fig. 1.
The invention is explained in more detail below with reference to an embodiment. Showing:
Fig. 1
a longitudinal section through an inventive. Ignition coil according to the embodiment;
Fig. 2
a section along the line AA in Fig. 1st

Fig. 1 zeigt einen Längsschnitt durch ein Ausführungsbeispiel einer erfindungsgemäßen Zündspule, die in ihrem oberen Bereich einen Niederspannungsanschluss 10 aufweist, an der die Zündspule mit der erforderlichen Niederspannung beaufschlagt wird. In ihrem unteren Bereich weist die Zündspule einen Hochspannungsanschlussbereich 5 auf, in der ein Verbindungsabschnitt.mit einer (nicht dargestellten) Zündkerze mündet.Fig. 1 shows a longitudinal section through a Embodiment of an ignition coil according to the invention, the one in their upper part Low-voltage terminal 10, at which the Ignition coil with the required low voltage is charged. In its lower area, the Ignition coil on a high voltage terminal area 5, in the one Verbindungsabschnitt.mit a (not shown) spark plug opens.

Die Zündspule weist eine zylindrische Bauform auf. Im Inneren der Zündspule ist ein zylindrischer magnetischer Kern 6 ausgebildet, der aus geschichteten magnetischen Blechen, insbesondere Eisensiliziumblechen, besteht. Einzelne magnetische Bleche unterschiedlicher Breite sind so gestapelt und unter Isolation der einzelnen Bleche gegeneinander zum Kern 6 mit näherungsweise kreisförmiger Kontur verbunden. Der Kern 6 ist von einem Sekundärspulenkörper 4 umgeben, welcher eine Sekundärwicklung 3 trägt, die elektrisch mit dem Hochspannungsanschlussbereich 5 verbunden ist. Die Verbindung der Sekundärwicklung 3 mit dem Hochspannungsanschlussbereich 5 erfolgt über einen im wesentlichen der Entstörung dienenden elektrischen Widerstand 11 und eine Gleichrichterdiode 12, welche in einem Gehäuse 13 untergebracht ist. The ignition coil has a cylindrical design. in the Inside of the ignition coil is a cylindrical magnetic Core 6 formed of layered magnetic Sheets, in particular iron silicon sheets exists. Single magnetic sheets of different widths are so stacked and under insulation of the individual sheets against each other to the core 6 with approximately circular Contour connected. The core 6 is of one Secondary coil body 4 surrounded, which a Secondary winding 3 carries, which electrically with the High voltage connection region 5 is connected. The Connection of the secondary winding 3 with the High voltage connection area 5 via a in essential electrical suppression Resistor 11 and a rectifier diode 12, which in a housing 13 is housed.

Der Sekundärspulenkörper 4 ist konzentrisch von einem Primärspulenkörper 2 umgeben, welcher eine Primärwicklung 1 trägt. Die Primärwicklung 1 ist im dargestellten Ausführungsbeispiel eine dreilagige Wicklung. Die Spuleneinheit ist von einer Hülse 7 umgeben, welcher aus einem elektrischleitfähigen und gleichzeitig magnetischleitfähigen Material, insbesondere Eisensiliziumblech, besteht.The secondary bobbin 4 is concentric with a Surround primary coil body 2, which is a primary winding 1 carries. The primary winding 1 is shown in FIG Embodiment, a three-layer winding. The Coil unit is surrounded by a sleeve 7, which consists of an electrically conductive and simultaneously magnetically conductive material, in particular Iron silicon sheet, consists.

In der dargestellten Ausführungsform ist die Hülse 7 durch zwei gegeneinander isolierte rollgeformte magnetische Bleche gebildet. Der äußere Umkreis der Hülse 7 bildet gleichzeitig die äußere Peripherie der beschriebenen Zündspule. Die Hülse 7, die Primärwicklung 1, die Sekundärwicklung 3 und der Kern 6 bilden einen magnetischen Kreis zur Erzeugung der erforderlichen Zündenergie, mit der die Zündkerze beaufschlagt wird. Aus Gründen der Vermeidung von Wirbelströmen im Bereich der magnetischleitfähigen Hülse 7 ist diese mit einem durchgängigen Längsschlitz 8 versehen. Entlang des Längsschlitzes 8 erstreckt sich eine der Zuleitungen der Primärwicklung 1, und zwar diejenige, die im unteren Bereich der Primärwicklung 1 aus dem Primärspulenkörper 2 herausgeführt ist und ebenso wie die oberseitig aus dem Primärspulenkörper 2 herausgeführte Zuleitung mit dem Niederspannungsanschluss 10 verbunden sein muss. Die entlang des Längsschlitzes 8 verlaufende Wicklungszuleitung 9 ist dabei über eine Isolationsschicht innerhalb des Schlitzbereichs fixiert, indem die Wicklungszuleitung 9 in entsprechend geeignetem Einbettungsmaterial fixiert ist. Die Einbettung erfolgt vorzugsweise mittels Epoxydharz.In the illustrated embodiment, the sleeve 7 through two mutually isolated rollformed ones formed magnetic sheets. The outer circumference of the sleeve 7 simultaneously forms the outer periphery of described ignition coil. The sleeve 7, the primary winding 1, the secondary winding 3 and the core 6 form one magnetic circuit for generating the required Ignition energy, which is applied to the spark plug. Out For reasons of avoiding eddy currents in the field of magnetically conductive sleeve 7, this is a continuous longitudinal slot 8 provided. Along the Longitudinal slot 8 extends one of the leads of Primary winding 1, namely the one in the lower Area of the primary winding 1 from the primary spool 2 is led out and just like the upper side of the Primary bobbin 2 led out lead with the Low-voltage connection 10 must be connected. The along the longitudinal slot 8 extending Winding lead 9 is over a Insulation layer fixed within the slot area, by the winding lead 9 in accordance with appropriate Embedding material is fixed. The embedding takes place preferably by means of epoxy resin.

Der zwischen der Herausführung der Enden der Sekundärwicklung 3 und dem Hochspannungsanschluss 5 ausgebildete zylinderförmige Bereich dient zum einen zur Unterbringung eines als Entstörelement dienenden Widerstands 11 und zum anderen zur Unterbringung einer Diode 12, durch welche eine Gleichrichtung des in die Zündkerze fließenden Stroms dahingehend erreicht wird, dass der negative Nutzimpuls für die Zündung durchgelassen, der positive störende Impuls jedoch unterdrückt wird.The between the leading out of the ends of the Secondary winding 3 and the high voltage terminal 5 trained cylindrical area serves for a Housing a serving as a suppression element Resistance 11 and on the other to accommodate a Diode 12, through which a rectification of the in the Spark plug flowing current is achieved to that effect that the negative payload for the ignition passed through, the positive disturbing impulse however is suppressed.

Claims (9)

Zündspule für eine Brennkraftmaschine mit einem eine Primärwicklung (1) tragenden, vorzugsweise zylindrischen, Primärspulenkörper (2),
einem Niederspannungsanschlussbereich (10) zum Anschließen der Primärwicklung (1) an eine Niederspannung,
einer mit der Primärwicklung (1) induktiv gekoppelten Sekundärwicklung (3) zum Bereitstellen einer Hochspannung für eine Zündkerze der Brennkraftmaschine, wobei die Sekundärwicklung (3) von einem vom Primärspulenkörper (2) konzentrisch umgebenen Sekundärspulenkörper (4) getragen wird,
einem Hochspannungsanschlussbereich (5), in welchem die Sekundärwicklung (3) die Zündkerze kontaktiert,
wobei der Sekundärspulenkörper (4) einen zylindrischen magnetischen Kern (6) umschließt und Primärspulenkörper (2) und Sekundärspulenkörper (4) gemeinsam von einer elektrisch und magnetisch leitfähigen Hülse (7) umgeben sind, wobei die Hülse (7) einen durchgehenden Längsschlitz (8) aufweist,
dadurch gekennzeichnet, dass
bei einer aus (2n-1), n= 1,2,3, ... Lagen bestehenden Primärwicklung (1) die vom Niederspannungsanschluss (10) entfernt austretende Wicklungszuleitung (9) derart entlang des Erstreckungsbereichs des Längsschlitzes (8) der Hülse (7) geführt ist, dass sie zumindest teilweise innerhalb des äußeren Umkreises der Hülse (7) verläuft.Ignition coil for an internal combustion engine having a primary coil (2), preferably cylindrical, carrying a primary winding (1),
a low voltage terminal portion (10) for connecting the primary winding (1) to a low voltage,
a secondary winding (3) inductively coupled to the primary winding (1) for supplying a high voltage to a spark plug of the internal combustion engine, the secondary winding (3) being carried by a secondary bobbin (4) concentrically surrounded by the primary bobbin (2),
a high voltage terminal region (5) in which the secondary winding (3) contacts the spark plug,
wherein the secondary coil body (4) encloses a cylindrical magnetic core (6) and primary coil body (2) and secondary coil body (4) are jointly surrounded by an electrically and magnetically conductive sleeve (7), wherein the sleeve (7) has a continuous longitudinal slot (8). having,
characterized in that
at a (2n-1), n = 1,2,3, ... layers existing primary winding (1) from the low-voltage terminal (10) remote winding lead (9) so along the extension region of the longitudinal slot (8) of the sleeve ( 7) is guided so that it extends at least partially within the outer circumference of the sleeve (7). Zündspule für eine Brennkraftmaschine nach Anspruch 1,
dadurch gekennzeichnet, dass
die Primärwicklung (1) dreilagig ausgeführt ist.Ignition coil for an internal combustion engine according to claim 1,
characterized in that
the primary winding (1) has three layers. Zündspule für eine Brennkraftmaschine nach Anspruch 1,
dadurch gekennzeichnet, dass
die Wandstärke der Hülse 0,8 bis 1,2 mm, insbesondere 1 mm, beträgt.Ignition coil for an internal combustion engine according to claim 1,
characterized in that
the wall thickness of the sleeve is 0.8 to 1.2 mm, in particular 1 mm. Zündspule für eine Brennkraftmaschine nach Anspruch
dadurch gekennzeichnet, dass
die Hülse (7) aus weichmagnetischem Blech, insbesondere Fe-Si Blech oder Edelstahlblech, besteht.Ignition coil for an internal combustion engine according to claim
characterized in that
the sleeve (7) made of soft magnetic sheet, in particular Fe-Si sheet or stainless steel sheet, consists. Zündspule für eine Brennkraftmaschine nach Anspruch 1,
dadurch gekennzeichnet, dass
die Hülse (7) mehrlagig, insbesondere zweilagig, aufgebaut ist.Ignition coil for an internal combustion engine according to claim 1,
characterized in that
the sleeve (7) is multi-layered, in particular double-layered. Zündspule für eine Brennkraftmaschine nach Anspruch 1,
dadurch gekennzeichnet, dass
die entlang des Schlitzbereichs verlaufende Wicklungszuleitung (9) einen Durchmesser von 0,5 bis 0,8 mm, insbesondere 0,75 mm, aufweist.Ignition coil for an internal combustion engine according to claim 1,
characterized in that
the winding supply line (9) extending along the slot region has a diameter of 0.5 to 0.8 mm, in particular 0.75 mm. Zündspule für eine Brennkraftmaschine nach Anspruch 1,
dadurch gekennzeichnet, dass
die entlang des Schlitzbereichs verlaufende Wicklungszuleitung (9) eine isolierende Ummantelung trägt.Ignition coil for an internal combustion engine according to claim 1,
characterized in that
the winding supply line (9) extending along the slot area carries an insulating jacket. Zündspule für eine Brennkraftmaschine nach Anspruch 1,
dadurch gekennzeichnet, dass
die entlang des Schlitzbereichs verlaufende Wicklungszuleitung (9) in isolierende Vergussmasse, insbesondere vergussharz, eingebettet ist.Ignition coil for an internal combustion engine according to claim 1,
characterized in that
the winding supply line (9) running along the slot area is embedded in insulating potting compound, in particular potting resin. Verfahren zur Herstellung einer Zündspule für eine Brennkraftmaschine nach Anspruch 1
dadurch gekennzeichnet, dass
bei einer aus (2n-1), n= 2, 3, ... Lagen bestehenden Primärwicklung die vom Niederspannungsanschluss entfernt angeordnete Wicklungszuleitung derart innerhalb des Bereich des Längsschlitzes der Hülse geführt wird, dass sie innerhalb des äußeren Umkreises der Hülse fixiert verläuft.A method of manufacturing an ignition coil for an internal combustion engine according to claim 1
characterized in that
in the case of a primary winding consisting of (2n-1), n = 2, 3,... layers, the winding supply line arranged away from the low-voltage connection is guided within the region of the longitudinal slot of the sleeve such that it is fixed within the outer circumference of the sleeve.
EP05000165.0A 2004-01-22 2005-01-05 Ignition coil for an internal combustion engine Not-in-force EP1557849B8 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004003216A DE102004003216B3 (en) 2004-01-22 2004-01-22 Ignition coil for an internal combustion engine
DE102004003216 2004-01-22

Publications (4)

Publication Number Publication Date
EP1557849A2 true EP1557849A2 (en) 2005-07-27
EP1557849A3 EP1557849A3 (en) 2006-02-01
EP1557849B1 EP1557849B1 (en) 2013-12-25
EP1557849B8 EP1557849B8 (en) 2014-02-26

Family

ID=34625747

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Application Number Title Priority Date Filing Date
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US (1) US7152592B2 (en)
EP (1) EP1557849B8 (en)
CN (1) CN100550227C (en)
DE (1) DE102004003216B3 (en)
HK (1) HK1081322A1 (en)

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DE102005043336A1 (en) * 2005-09-12 2007-03-15 Pulse Gmbh Bar ignition transformer for supplying an ignition means, in particular a spark plug of an internal combustion engine, with a high voltage
DE102006008736B3 (en) * 2006-02-24 2007-05-31 Innotec Forschungs- Und Entwicklungs-Gmbh Combustion engine for a vehicle comprises a cylinder head hood made from an electrically non-conducting material, an ignition coil arranged in a channel in the hood and a electromagnetic screening sleeve made from a flat conducting material
DE102006020170A1 (en) * 2006-05-02 2007-11-08 Robert Bosch Gmbh Ignition coil, in particular for an internal combustion engine of a motor vehicle
DE102006033480A1 (en) * 2006-07-19 2008-01-24 Robert Bosch Gmbh Spark plug, especially for high combustion chamber pressures
IL180334A (en) * 2006-12-26 2014-03-31 Elta Systems Ltd Method and system for monitoring an underground electric cable
JP5206877B2 (en) 2009-08-06 2013-06-12 トヨタ自動車株式会社 Device for determining an imbalance between air-fuel ratios of an internal combustion engine
US9097232B2 (en) 2011-10-26 2015-08-04 Delphi Technologies, Inc. Ignition coil assembly

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EP0796993A2 (en) * 1996-03-21 1997-09-24 Hitachi, Ltd. Ignition apparatus for use in internal combustion engine
DE10057567A1 (en) * 2000-11-21 2002-05-23 Bremi Auto Elek K Ernst Bremic Method for producing an ignition coil for an internal combustion engine involves casting of at least parts of the low-voltage zone in a plastic material differing from that used for casting the secondary coil

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Publication number Priority date Publication date Assignee Title
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Publication number Priority date Publication date Assignee Title
US4514712A (en) * 1975-02-13 1985-04-30 Mcdougal John A Ignition coil
EP0796993A2 (en) * 1996-03-21 1997-09-24 Hitachi, Ltd. Ignition apparatus for use in internal combustion engine
DE10057567A1 (en) * 2000-11-21 2002-05-23 Bremi Auto Elek K Ernst Bremic Method for producing an ignition coil for an internal combustion engine involves casting of at least parts of the low-voltage zone in a plastic material differing from that used for casting the secondary coil

Also Published As

Publication number Publication date
EP1557849B8 (en) 2014-02-26
US20050184847A1 (en) 2005-08-25
EP1557849A3 (en) 2006-02-01
HK1081322A1 (en) 2006-05-12
EP1557849B1 (en) 2013-12-25
CN1645529A (en) 2005-07-27
US7152592B2 (en) 2006-12-26
DE102004003216B3 (en) 2005-08-25
CN100550227C (en) 2009-10-14

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