EP1576628A2 - Rod ignition coil - Google Patents

Rod ignition coil

Info

Publication number
EP1576628A2
EP1576628A2 EP03773530A EP03773530A EP1576628A2 EP 1576628 A2 EP1576628 A2 EP 1576628A2 EP 03773530 A EP03773530 A EP 03773530A EP 03773530 A EP03773530 A EP 03773530A EP 1576628 A2 EP1576628 A2 EP 1576628A2
Authority
EP
European Patent Office
Prior art keywords
coil
ignition coil
winding
elastomer
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03773530A
Other languages
German (de)
French (fr)
Inventor
Konstantin Lindenthal
Reinhold Herrmann
Thomas Breckle
Nikolaus Hautmann
Wolfgang Ammann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1576628A2 publication Critical patent/EP1576628A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins
    • 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

Definitions

  • the invention is based on a pencil ignition coil for ignition systems, in particular a pencil ignition coil for use in an internal combustion engine of a motor vehicle, according to the type defined in more detail in the preamble of claim 1.
  • Such a pencil ignition coil is known from German patent DE 199 27 820 Cl and is used to supply a spark plug of a motor vehicle internal combustion engine with high voltage.
  • This pencil ignition coil has a substantially concentric structure and comprises a centrally arranged rod core made of a magnetizable material.
  • An inner coil former the so-called secondary coil former, is arranged around the rod core, on which in turn a winding serving as a secondary coil is arranged.
  • the winding is connected to a high-voltage connection which can be electrically connected to the spark plug.
  • the secondary coil is in turn surrounded by an outer coil former, the so-called primary coil former, which carries a second winding designed as a primary winding.
  • the primary winding is connected to a connection for connection to a low voltage source via control electronics.
  • the assembly consisting of the secondary bobbin, the secondary winding, the primary bobbin and the primary winding is cast with a casting material, which is formed, for example, from epoxy resin, and is arranged in a coil housing, which on the outside for closing a magnetic circuit comprising the rod core with a yoke plate is provided.
  • a pencil ignition coil with such a structure is also known from German utility model DE 299 18 100 Ul.
  • the housing consists at least partially of an electrically conductive plastic, so that the housing and the return plate are at the same electrical potential, and partial electrical discharges between a central section of the housing and the return plate are excluded during operation of the pencil ignition coil.
  • the known pencil ignition coils described above each have a diameter which may be too large for a space available in an internal combustion engine.
  • the rod ignition coil according to the invention with the features according to the preamble of claim 1, in which rod ignition coil, the second coil body is formed by a structural unit which comprises the first coil body, the first coil winding and a casting compound for the first coil winding, has the advantage that it can be made with a smaller diameter compared to known rod ignition coils and therefore requires a smaller installation space in an internal combustion engine. This is ensured in that the ignition coil according to the invention does not have a separate second coil body. Rather, the second coil former is formed from components that are already present in the rod ignition coil. The first coil winding is potted, the second coil winding being wound directly onto the potting compound for the first coil winding.
  • the rod ignition coil according to the invention thus has a simplified structure compared to the prior art, less
  • the rod ignition coil according to the invention also has optimized electrical properties and improved properties compared to the known rod ignition coils described above
  • the first coil body of the pencil ignition coil according to the invention which surrounds the rod core, forms the so-called secondary coil former on which the first coil winding designed as a secondary winding is arranged.
  • the secondary winding is then connected to the contacts formed as high-voltage connections, which are used for connection to the relevant spark plug.
  • the second coil winding then forms the so-called primary winding, which is connected to a low voltage source.
  • the rod ignition coil according to the invention can be produced, for example, by first producing the structural unit from the first coil former, first coil winding and casting compound and then providing this structural unit with the second coil winding and assembling it together with a rod core in a plastic housing.
  • the pencil ignition coil is completed with a return plate, a protective jacket for the spark plug, a gasket arranged on the circumference, which is connected to the engine block of the internal combustion engine in the installed position, a plug for connection to a low-voltage source and other necessary, not described and usual components ,
  • a yoke device forms the is usually designed as a sleeve-shaped return plate, the housing.
  • the housing or the return plate is then spaced apart from the second coil winding by an air gap, which is arranged on the assembly of the first coil body, the first coil winding and the sealing compound.
  • the structural unit comprising the first coil former, the first coil winding and the sealing compound and on which the second coil winding is arranged is fixed by means of an elastomer.
  • This elastomer can also fix the rod core, form a protective jacket for a spark plug to be connected to the rod ignition coil, a retaining ring or protective ring for the rod ignition coil and also form a mechanical fixation for the yoke element and / or a connector.
  • This rod ignition coil having the elastomer is produced in such a way that the structural unit provided with the primary winding is pushed onto a rod core, for example an iron core or a magnetic core, and is completed with the connecting plug connector and the yoke element. All electrical connections are made here.
  • the assembly thus created is then placed in a tool and filled and / or encased with an elastomer.
  • the embedding for the rod core or iron core and its mechanical fixation, the protective jacket for the spark plug, the seal or the retaining ring, an at least partial embedding of the primary winding in the elastomer and the mechanical fi xation of the yoke element and the connector In this embodiment, there is no need for an otherwise conventional shrink tube and a buffer, which were used to decouple the iron core. A pencil ignition coil with fewer components and the same electrical properties is thus obtained. This in turn leads to lower costs.
  • FIG. 1 shows a partial section of a pencil ignition coil according to the invention
  • Figure 2 is an enlarged sectional view of the area II dashed in Figure 1;
  • FIG. 3 shows a secondary casting of the pencil ignition coil according to FIG. 1;
  • FIG. 4 shows the secondary casting according to FIG. 3 with a primary winding
  • FIG. 5 shows a second embodiment of a pencil ignition coil according to the invention in a representation corresponding to FIG. 2;
  • FIG. 6 shows a longitudinal section through a third embodiment of a pencil ignition coil according to the invention.
  • FIG. 7 shows the pencil ignition coil according to FIG. 6 before filling or encasing with an elastomer.
  • FIG. 1 to 4 show a pencil ignition coil 10, which is designed for connection to a spark plug (not shown here) and can be inserted into a shaft in the cylinder head of an internal combustion engine (also not shown here).
  • the pencil ignition coil 10 comprises, in a coaxial arrangement with a longitudinal axis 12, an elongated rod core 14 arranged in a central position, which is made of iron or a magnet.
  • the secondary winding 18 can be connected to the spark plug on the output side for high-voltage supply and together with contacts
  • the second coil winding 26 is connected to a connector 28 shown in Figure 1, which is used to connect the pencil ignition coil 10 to a low voltage source of the motor vehicle in question.
  • the primary winding 26 is surrounded by an air gap 30 which is delimited radially outwardly from a group consisting of plastic ignition coil 32 'is present at which in turn a sleeve-shaped return plate 34, the element as remindschlußele- a 14 comprising the magnetic circuit of the pencil ignition coil 10 serves the rod core ,
  • the rod ignition coil 10 shown in the assembled state in FIG. 1 is produced in such a way that the secondary winding 18 is first applied to the secondary coil former 16 and is cast together with the contacts 20 and 22 in a mold with the casting compound 24 made of epoxy resin to form the secondary casting, so that the assembly shown in Figure 3 is created.
  • This unit now serves as the primary winding body for the primary winding 26 for producing the assembly shown in FIG.
  • the latter assembly is then mounted in the plastic housing 32.
  • the yoke plate 34, a protective jacket 36, a seal 38, the connector 28 and other necessary components, but not explained here, are mounted.
  • FIG. 5 shows a partial view of a second embodiment of a pencil ignition coil 50, which essentially corresponds to that according to FIGS. 1 to 4, but differs from it in that it does not have an artificial has fabric housing. Rather, the yoke plate 34 is mounted directly above the air gap 30 surrounding the primary winding 26, which leads to a further reduction in the installation space required for the pencil ignition coil 50 in the cylinder head of the internal combustion engine.
  • FIGS. 6 and 7 show a further embodiment of a pencil ignition coil 60, the construction of which largely corresponds to that of the pencil ignition coil according to FIGS. 1 to 4, but differs from this in that it is formed with an elastomer 62 which has both functional properties as well as fixing properties.
  • the elastomer 62 fills out and at least partially envelops an assembly of the pencil ignition coil 60 comprising the electrical or magnetic components.
  • This assembly is shown in more detail in FIG. 7 and comprises the assembly shown in FIG. 4, which consists of the secondary bobbin 16, the secondary winding 18, the sealing compound 24, the primary winding 26 and contacts 20 and 22.
  • the iron core 14 is inserted into this assembly or this winding set. Furthermore, this winding set is connected to the connector 28 and surrounded by the yoke plate 34.
  • the assembly assembled in this way and which is electrically or magnetically connected is placed in a tool during manufacture and then filled or encased with the elastomer 62.
  • a fixation or embedding 64 is created for the iron core 14, a protective jacket 66 for a spark plug to be connected to the pencil ignition coil 60, a seal or Bracket 68, which is in the installed position of the ignition coil 60 on the engine block of the internal combustion engine, an embedding 70 for the primary winding 26 and a mechanical fixation of the yoke plate 34 and the connector 28.

Abstract

A rod ignition coil is disclosed, comprising a rod core (14), a first coil body (16) with a first coil winding (18) and a second coil body with a second coil winding (26). According to the invention, the second coil body is formed from a component which comprises the first coil body (16), the first coil winding (18) and a sealing compound (24) for the first coil winding (18).

Description

StabZündspulepencil coil
Stand der TechnikState of the art
Die Erfindung geht von einer Stabzündspule für Zündanlagen, insbesondere von einer Stabzündspule zum Einsatz bei einer Brennkraftmaschine eines Kraftfahrzeuges, gemäß der im Oberbegriff des Patentanspruches 1 näher definierten Art aus .The invention is based on a pencil ignition coil for ignition systems, in particular a pencil ignition coil for use in an internal combustion engine of a motor vehicle, according to the type defined in more detail in the preamble of claim 1.
Eine derartige Stabzündspule ist aus der Deutschen Patentschrift DE 199 27 820 Cl bekannt und dient zur Hochspannungsversorgung einer Zündkerze einer Kraftfahrzeug-Brennkraftmaschine. Diese Stabzündspule hat einen im wesentlichen konzentrischen Aufbau und umfaßt einen zentral angeordneten Stabkern aus einem magnetisierbaren Material. Um den Stabkern ist ein innerer Spulenkörper, der sogenannte Sekundärspulenkörper, angeordnet, auf welchem wiederum eine als Sekundärspule dienende Wicklung angeordnet ist. Diese Wicklung steht in Verbindung mit einem Hochspannungsanschluß, der mit der Zündkerze elektrisch verbindbar ist. Die Sekundärspule ist wiederum von einem äußeren Spulenkörper, dem sogenannten Primärspulenkörper, umgeben, der eine als Primärwicklung ausgeführte zweite Wicklung trägt. DieSuch a pencil ignition coil is known from German patent DE 199 27 820 Cl and is used to supply a spark plug of a motor vehicle internal combustion engine with high voltage. This pencil ignition coil has a substantially concentric structure and comprises a centrally arranged rod core made of a magnetizable material. An inner coil former, the so-called secondary coil former, is arranged around the rod core, on which in turn a winding serving as a secondary coil is arranged. This The winding is connected to a high-voltage connection which can be electrically connected to the spark plug. The secondary coil is in turn surrounded by an outer coil former, the so-called primary coil former, which carries a second winding designed as a primary winding. The
Primärwicklung ist über eine Steuerelektronik mit einem Anschluß zur Verbindung mit einer Niederspannungsquelle verbunden. Die aus dem Sekundärspulenkörper, der Sekundärwicklung, dem Primärspulenkörper und der Primärwicklung beste- hende Baugruppe ist mit einem Gießwerkstoff, der beispielsweise aus Epoxidharz gebildet ist, vergossen und in einem Spulengehäuse angeordnet, welches an seiner Außenseite zum Schließen eines den Stabkern umfassenden Magnetkreises mit einem Rückschlußblech versehen ist.The primary winding is connected to a connection for connection to a low voltage source via control electronics. The assembly consisting of the secondary bobbin, the secondary winding, the primary bobbin and the primary winding is cast with a casting material, which is formed, for example, from epoxy resin, and is arranged in a coil housing, which on the outside for closing a magnetic circuit comprising the rod core with a yoke plate is provided.
Eine Stabzündspule mit einem derartigen Aufbau ist auch aus der deutschen Gebrauchsmusterschrift DE 299 18 100 Ul bekannt. Bei dieser Stabzündspule besteht das Gehäuse zumindest teilweise aus einem elektrisch leitfähigen Kunststoff, so daß das Gehäuse und das Rückschlußblech auf dem gleichen elektrischen Potential liegen und beim Betrieb der Stabzündspule elektrische Teilentladungen zwischen einem Zentralabschnitt des Gehäuses und dem Rückschlußblech ausgeschlossen sind.A pencil ignition coil with such a structure is also known from German utility model DE 299 18 100 Ul. In this pencil ignition coil, the housing consists at least partially of an electrically conductive plastic, so that the housing and the return plate are at the same electrical potential, and partial electrical discharges between a central section of the housing and the return plate are excluded during operation of the pencil ignition coil.
Die vorstehend beschriebenen, bekannten Stabzündspulen haben jeweils einen Durchmesser, der gegebenenfalls für einen bei einer Brennkraftmaschine zur Verfügung stehenden Bauraum zu groß ist. Vorteile der ErfindungThe known pencil ignition coils described above each have a diameter which may be too large for a space available in an internal combustion engine. Advantages of the invention
Die Stabzundspule nach der Erfindung mit den Merkmalen nach dem Oberbegriff des Patentanspruches 1, bei welcher Stab- Zündspule der zweite Spulenkorper von einer Baueinheit gebildet ist, die den ersten Spulenkorper, die erste Spulenwicklung und eine Vergußmasse für die erste Spulenwicklung umfaßt, hat demgegenüber den Vorteil, daß sie im Vergleich zu bekannten Stabzundspulen mit einem geringeren Durchmesser ausgeführt sein kann und mithin einen kleineren Einbauraum in einer Brennkraftmaschine erfordert. Dies ist dadurch gewahrleistet, daß die Zündspule nach der Erfindung keinen separaten zweiten Spulenkorper aufweist. Vielmehr ist der zweite Spulenkorper von ohnehin in der Stabzundspu- le vorhandenen Bauteilen gebildet. Die erste Spulenwicklung ist vergossen, wobei die zweite Spulenwicklung direkt auf die Vergußmasse für die erste Spulenwicklung gewickelt ist.The rod ignition coil according to the invention with the features according to the preamble of claim 1, in which rod ignition coil, the second coil body is formed by a structural unit which comprises the first coil body, the first coil winding and a casting compound for the first coil winding, has the advantage that it can be made with a smaller diameter compared to known rod ignition coils and therefore requires a smaller installation space in an internal combustion engine. This is ensured in that the ignition coil according to the invention does not have a separate second coil body. Rather, the second coil former is formed from components that are already present in the rod ignition coil. The first coil winding is potted, the second coil winding being wound directly onto the potting compound for the first coil winding.
Die Stabzundspule nach der Erfindung hat mithin gegenüber dem Stand der Technik einen vereinfachten Aufbau, wenigerThe rod ignition coil according to the invention thus has a simplified structure compared to the prior art, less
Bauteile, einen geringeren Stoffeinsatz und eine optimierte Baugroße. Dies fuhrt wiederum zu geringeren Herstellungskosten. Auch weist die Stabzundspule nach der Erfindung gegenüber den oben beschriebenen bekannten Stabzundspulen op- timierte elektrische Eigenschaften und eine verbesserteComponents, less use of materials and an optimized size. This in turn leads to lower manufacturing costs. The rod ignition coil according to the invention also has optimized electrical properties and improved properties compared to the known rod ignition coils described above
Dauerhaltbarkeit im Temperaturbereich zwischen -50 °C und +150 °C auf.Durability in the temperature range between -50 ° C and +150 ° C.
Bei einer besonders kompakten Ausfuhrungsform der Stabzund- spule nach der Erfindung sind in der beispielsweise ausIn a particularly compact embodiment of the rod ignition coil according to the invention, for example, in the
Epoxidharz gebildeten Vergußmasse Kontaktierungen für die erste Wicklung eingebettet, so daß die Kontaktierungen ebenfalls Bestandteil der Baueinheit sind, die den zweiten Spulenkörper bildet bzw. einen sogenannten Sekundärgießlung darstellt.Potting compound formed epoxy resin contacts for the embedded first winding, so that the contacts are also part of the unit that forms the second bobbin or represents a so-called secondary casting.
Wie bei Stabzündspulen üblich, bildet der erste Spulenkörper der Stabzündspule nach der Erfindung, welcher den Stabkern umschließt, den sogenannten Sekundärspulenkörper, auf dem die als Sekundärwicklung ausgebildete erste Spulenwick- lung angeordnet ist. Die Sekundärwicklung ist dann mit den als Hochspannungsanschlüsse ausgebildeten Kontaktierungen verbunden, die zur Verbindung mit der betreffenden Zündkerze dienen. Die zweite Spulenwicklung bildet dann die sogenannte Primärwicklung, die mit einer Niederspannungsquelle verbunden ist.As is customary with pencil ignition coils, the first coil body of the pencil ignition coil according to the invention, which surrounds the rod core, forms the so-called secondary coil former on which the first coil winding designed as a secondary winding is arranged. The secondary winding is then connected to the contacts formed as high-voltage connections, which are used for connection to the relevant spark plug. The second coil winding then forms the so-called primary winding, which is connected to a low voltage source.
Die Herstellung der Stabzündspule nach der Erfindung kann beispielsweise derart erfolgen, daß zunächst die Baueinheit aus erstem Spulenkörper, erster Spulenwicklung und Verguß- masse gefertigt und diese Baueinheit dann mit der zweiten Spulenwicklung versehen und zusammen mit einem Stabkern in ein Kunststoffgehäuse montiert wird. Komplettiert wird die Stabzündspule mit einem Rückschlußblech, einem Schutzmantel für die Zündkerze, einer am Umfang angeordneten Dichtung, die in Einbaulage mit dem Motorblock der Brennkraftmaschine in Verbindung steht, einem Stecker zur Verbindung mit einer Niederspannungsquelle und weiteren erforderlichen, hier nicht näher beschriebenen und üblichen Bauteilen.The rod ignition coil according to the invention can be produced, for example, by first producing the structural unit from the first coil former, first coil winding and casting compound and then providing this structural unit with the second coil winding and assembling it together with a rod core in a plastic housing. The pencil ignition coil is completed with a return plate, a protective jacket for the spark plug, a gasket arranged on the circumference, which is connected to the engine block of the internal combustion engine in the installed position, a plug for connection to a low-voltage source and other necessary, not described and usual components ,
Bei einer alternativen Ausführungsform der Stabzündspule nach der Erfindung bildet eine Rückschlußeinrichtung, die in der Regel als hülsenförmiges Rückschlußblech ausgebildet ist, das Gehäuse. Das Gehäuse bzw. das Rückschlußblech ist dann über einen Luftspalt von der zweiten Spulenwicklung beabstandet, die auf der Baugruppe aus dem ersten Spulen- körper, der ersten Spulenwicklung und der Vergußmasse angeordnet ist.In an alternative embodiment of the pencil ignition coil according to the invention, a yoke device forms the is usually designed as a sleeve-shaped return plate, the housing. The housing or the return plate is then spaced apart from the second coil winding by an air gap, which is arranged on the assembly of the first coil body, the first coil winding and the sealing compound.
Bei einer speziellen Ausführungsform der Stabzündspule nach der Erfindung ist die Baueinheit, die den ersten Spulenkör- per, die erste Spulenwicklung und die Vergußmasse umfaßt und auf der die zweite Spulenwicklung angeordnet ist, mittels eines Elastomers fixiert. Dieses Elastomer kann des weiteren auch den Stabkern fixieren, einen Schutzmantel für eine mit der Stabzündspule zu verbindende Zündkerze, einen Haltering bzw. Schutzring für die Stabzünspule und auch eine mechanische Fixierung für das Rückschlußelement und/oder einen Anschlußsteckverbinder bilden.In a special embodiment of the pencil ignition coil according to the invention, the structural unit comprising the first coil former, the first coil winding and the sealing compound and on which the second coil winding is arranged is fixed by means of an elastomer. This elastomer can also fix the rod core, form a protective jacket for a spark plug to be connected to the rod ignition coil, a retaining ring or protective ring for the rod ignition coil and also form a mechanical fixation for the yoke element and / or a connector.
Die Herstellung dieser das Elastomer aufweisenden Stabzünd- spule erfolgt derart, daß die mit der Primärwicklung versehene Baueinheit auf einen Stabkern, beispielsweise einen Eisenkern oder einen Magnetkern, geschoben und mit dem Anschlußsteckverbinder und dem Rückschlußelement komplettiert wird. Hierbei werden alle elektrischen Verbindungen herge- stellt. Die so entstandene Baugruppe wird dann in ein Werkzeug eingelegt und mit einem Elastomer ausgefüllt und/oder umhüllt. Bei diesem Arbeitsschritt entsteht die Einbettung für den Stabkern bzw. Eisenkern sowie dessen mechanische Fixierung, der Schutzmantel für die Zündkerze, die Dichtung bzw. der Haltering, eine zumindest teilweise Einbettung der Primärwicklung in das Elastomer sowie die mechanische Fi- xierung des Rückschlußelements und des Anschlußsteckverbinders. Bei dieser Ausführungsform kann auf einen sonst üblichen Schrumpfschlauch und auf einen Puffer verzichtet werden, welche zur Entkopplung des Eisenkerns eingesetzt wur- den. Man erhält mithin eine Stabzündspule mit weniger Bauteilen bei gleichen elektrischen Eigenschaften. Dies führt wiederum zu geringeren Kosten.This rod ignition coil having the elastomer is produced in such a way that the structural unit provided with the primary winding is pushed onto a rod core, for example an iron core or a magnetic core, and is completed with the connecting plug connector and the yoke element. All electrical connections are made here. The assembly thus created is then placed in a tool and filled and / or encased with an elastomer. In this step, the embedding for the rod core or iron core and its mechanical fixation, the protective jacket for the spark plug, the seal or the retaining ring, an at least partial embedding of the primary winding in the elastomer and the mechanical fi xation of the yoke element and the connector. In this embodiment, there is no need for an otherwise conventional shrink tube and a buffer, which were used to decouple the iron core. A pencil ignition coil with fewer components and the same electrical properties is thus obtained. This in turn leads to lower costs.
Weitere Vorteile und vorteilhafte Ausgestaltungen des Ge- genstandes nach der Erfindung sind der Beschreibung, 'der Zeichnung und den Patentansprüchen entnehmbar.Further advantages and advantageous embodiments of the overall gene tandes according to the invention, the description 'of the drawing and the patent claims.
Zeichnungdrawing
Drei Ausführungsbeispiele einer Stabzündspule nach der Erfindung sind in der Zeichnung schematisch vereinfacht dargestellt und werden in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 einen Teilschnitt einer Stabzündspule nach der Erfindung;Three embodiments of a pencil ignition coil according to the invention are shown schematically simplified in the drawing and are explained in more detail in the following description. FIG. 1 shows a partial section of a pencil ignition coil according to the invention;
Figur 2 eine vergrößerte Schnittdarstellung des in Figur 1 gestrichelt umrandeten Bereichs II;Figure 2 is an enlarged sectional view of the area II dashed in Figure 1;
Figur 3 einen Sekundärgießling der Stabzündspule nach Fi- gur 1;FIG. 3 shows a secondary casting of the pencil ignition coil according to FIG. 1;
Figur 4 den Sekundärgießling nach Figur 3 mit einer Primärwicklung;4 shows the secondary casting according to FIG. 3 with a primary winding;
Figur 5 eine zweite Ausführungsform einer Stabzündspule nach der Erfindung in einer Figur 2 entsprechenden Darstel- lung; Figur 6 einen Längsschnitt durch eine dritte Ausführungsform einer Stabzündspule nach der Erfindung; undFIG. 5 shows a second embodiment of a pencil ignition coil according to the invention in a representation corresponding to FIG. 2; FIG. 6 shows a longitudinal section through a third embodiment of a pencil ignition coil according to the invention; and
Figur 7 die Stabzündspule nach Figur 6 vor dem Ausfüllen bzw. Umhüllen mit einem Elastomer.7 shows the pencil ignition coil according to FIG. 6 before filling or encasing with an elastomer.
Beschreibung der AusführungsbeispieleDescription of the embodiments
In den Figuren 1 bis 4 ist eine Stabzündspule 10 darge- stellt, die zur Verbindung mit einer hier nicht näher dargestellten Zündkerze ausgelegt und in einen Schacht im Zylinderkopf einer hier ebenfalls nicht näher dargestellten Brennkraftmaschine einsetzbar ist.1 to 4 show a pencil ignition coil 10, which is designed for connection to a spark plug (not shown here) and can be inserted into a shaft in the cylinder head of an internal combustion engine (also not shown here).
Die Stabzündspule 10 umfaßt in koaxialer Anordnung zu einer Längsachse 12 einen in 'zentraler Lage angeordneten, langgezogenen Stabkern 14, der aus Eisen oder auch einem Magnet gebildet ist.The pencil ignition coil 10 comprises, in a coaxial arrangement with a longitudinal axis 12, an elongated rod core 14 arranged in a central position, which is made of iron or a magnet.
Konzentrisch um den Stabkern 14 ist ein erster Spulenkörper 16, der sogenannte Sekundärspulenkörper, angeordnet. Auf den Spulenkörper 16 ist eine erste Spulenwicklung 18, die sogenannte Sekundärwicklung, aufgebracht. Die Sekundärwicklung 18 ist ausgangsseitig zur Hochspannungsversorgung mit der Zündkerze verbindbar und zusammen mit KontaktierungenA first coil former 16, the so-called secondary coil former, is arranged concentrically around the rod core 14. A first coil winding 18, the so-called secondary winding, is applied to the coil former 16. The secondary winding 18 can be connected to the spark plug on the output side for high-voltage supply and together with contacts
20 und 22 in einer Form mit einer Vergußmasse 24 vergossen, so daß eine eine sogenannte Sekundärgießung darstellende Baueinheit aus dem Sekundärspulenkern 16, der Sekundärwicklung 18 und der Vergußmasse 24 gebildet ist, die einen zweiten Spulenkörper, den sogenannten Primärspulenkörper, für eine zweite Spulenwicklung 26, die sogenannte Primär- wicklung, darstellt. Die zweite Spulenwicklung 26 ist mit einem in Figur 1 dargestellten Steckverbinder 28 verbunden, der zum Anschluß der Stabzündspule 10 an eine Niederspannungsquelle des betreffenden Kraftfahrzeuges dient.20 and 22 are cast in a mold with a casting compound 24, so that a structural unit which represents a so-called secondary casting is formed from the secondary coil core 16, the secondary winding 18 and the casting compound 24 and which forms a second coil former, the so-called primary coil former, for a second coil winding 26, the so-called primary winding, represents. The second coil winding 26 is connected to a connector 28 shown in Figure 1, which is used to connect the pencil ignition coil 10 to a low voltage source of the motor vehicle in question.
Die Primärwicklung 26 ist von einem Luftspalt 30 umgeben, der radial außen von einem aus Kunststoff bestehenden Zündspulengehäuse 32 begrenzt ist,' an dem wiederum ein hülsen- förmiges Rückschlußblech 34 anliegt, das als Rückschlußele- ment eines den Stabkern 14 umfassenden Magnetkreises der Stabzündspule 10 dient.The primary winding 26 is surrounded by an air gap 30 which is delimited radially outwardly from a group consisting of plastic ignition coil 32 'is present at which in turn a sleeve-shaped return plate 34, the element as Rückschlußele- a 14 comprising the magnetic circuit of the pencil ignition coil 10 serves the rod core ,
Die Herstellung der in Figur 1 im zusammengesetzten Zustand dargestellten Stabzündspule 10 erfolgt derart, daß zunächst auf den Sekundärspulenkörper 16 die Sekundärwicklung 18 aufgebracht und zusammen mit den Kontaktierungen 20 und 22 in einer Form mit der aus Epoxidharz bestehenden Vergußmasse 24 zu dem Sekundärgießling vergossen wird, so daß die in Figur 3 dargestellte Baueinheit entsteht. Diese Bauein- heit dient nun als Primärwickelkörper für die Primärwicklung 26 zur Herstellung der in Figur 4 dargestellten Baugruppe. Letztgenannte Baugruppe wird dann in das Kunststoffgehäuse 32 montiert. Des weiteren werden das Rückschlußblech 34, ein Schutzmantel 36, eine Dichtung 38, der Steckverbinder 28 sowie sonstige erforderliche, aber hier nicht näher erläuterte Bauteile montiert.The rod ignition coil 10 shown in the assembled state in FIG. 1 is produced in such a way that the secondary winding 18 is first applied to the secondary coil former 16 and is cast together with the contacts 20 and 22 in a mold with the casting compound 24 made of epoxy resin to form the secondary casting, so that the assembly shown in Figure 3 is created. This unit now serves as the primary winding body for the primary winding 26 for producing the assembly shown in FIG. The latter assembly is then mounted in the plastic housing 32. Furthermore, the yoke plate 34, a protective jacket 36, a seal 38, the connector 28 and other necessary components, but not explained here, are mounted.
In Figur 5 ist eine Teilansicht einer zweiten Ausführungsform einer Stabzündspule 50 dargestellt, die im wesentli- chen derjenigen nach den Figuren 1 bis 4 entspricht, sich von dieser aber dadurch unterscheidet, daß sie kein Kunst- stoffgehäuse aufweist. Vielmehr ist das Rückschlußblech 34 direkt über dem die Primärwicklung 26 umgebenden Luftspalt 30 montiert, was zu einer weiteren Reduzierung des für die Stabzündspule 50 erforderlichen Bauraums in dem Zylinder- köpf der Brennkraftmaschine führt.FIG. 5 shows a partial view of a second embodiment of a pencil ignition coil 50, which essentially corresponds to that according to FIGS. 1 to 4, but differs from it in that it does not have an artificial has fabric housing. Rather, the yoke plate 34 is mounted directly above the air gap 30 surrounding the primary winding 26, which leads to a further reduction in the installation space required for the pencil ignition coil 50 in the cylinder head of the internal combustion engine.
In den Figuren 6 und 7 ist eine weitere Ausführungsform einer Stabzündspule 60 dargestellt, deren Aufbau wiederum weitgehend demjenigen der Stabzündspule nach den Figuren 1 bis 4 entspricht, sich von diesem aber dadurch unterscheidet, daß sie mit einem Elastomer 62 ausgebildet ist, das sowohl funktionelle Eigenschaften als auch Fixiereigenschaften hat.6 and 7 show a further embodiment of a pencil ignition coil 60, the construction of which largely corresponds to that of the pencil ignition coil according to FIGS. 1 to 4, but differs from this in that it is formed with an elastomer 62 which has both functional properties as well as fixing properties.
Das Elastomer 62 füllt eine die elektrischen bzw. magnetischen Bauteile umfassende Baugruppe der Stabzündspule 60 aus und umhüllt diese zumindest teilweise. Diese Baugruppe ist in Figur 7 näher dargestellt und umfaßt zentral die in Figur 4 dargestellte Baugruppe, welche aus dem Sekundärspu- lenkörper 16, der Sekundärwicklung 18, der Vergußmasse 24, der Primärwicklung 26 sowie Kontaktierungen 20 und 22 besteht. In diese Baugruppe bzw. diesen Wicklungssatz ist der Eisenkern 14 eingesteckt. Des weiteren ist dieser Wicklungssatz mit dem Steckverbinder 28 verbunden sowie von dem Rückschlußblech 34 umgeben. Die so zusammengesetzte und elektrisch bzw. magnetisch verbundene Baugruppe wird bei der Herstellung in ein Werkzeug eingelegt und dann mit dem Elastomer 62 ausgefüllt bzw. umhüllt. Bei diesem Arbeitsschritt entsteht eine Fixierung bzw. Einbettung 64 für den Eisenkern 14, ein Schutzmantel 66 für eine mit der Stabzündspule 60 zu verbindende Zündkerze, eine Dichtung bzw. Halterung 68, welche in Einbaulage der Zündspule 60 an dem Motorblock der Brennkraftmaschine anliegt, eine Einbettung 70 für die Primärwicklung 26 sowie eine mechanische Fixierung des Rückschlußblechs 34 und des Steckverbinders 28. The elastomer 62 fills out and at least partially envelops an assembly of the pencil ignition coil 60 comprising the electrical or magnetic components. This assembly is shown in more detail in FIG. 7 and comprises the assembly shown in FIG. 4, which consists of the secondary bobbin 16, the secondary winding 18, the sealing compound 24, the primary winding 26 and contacts 20 and 22. The iron core 14 is inserted into this assembly or this winding set. Furthermore, this winding set is connected to the connector 28 and surrounded by the yoke plate 34. The assembly assembled in this way and which is electrically or magnetically connected is placed in a tool during manufacture and then filled or encased with the elastomer 62. In this step, a fixation or embedding 64 is created for the iron core 14, a protective jacket 66 for a spark plug to be connected to the pencil ignition coil 60, a seal or Bracket 68, which is in the installed position of the ignition coil 60 on the engine block of the internal combustion engine, an embedding 70 for the primary winding 26 and a mechanical fixation of the yoke plate 34 and the connector 28.

Claims

Ansprüche Expectations
1. Stabzündspule, umfassend einen Stabkern (14), einen ersten Spulenkörper (16) mit einer ersten Spulenwicklung (18) und einen zweiten Spulenkörper mit einer zweiten1. Rod ignition coil comprising a rod core (14), a first coil former (16) with a first coil winding (18) and a second coil former with a second
Spulenwicklung (26), dadurch gekennzeichnet, daß der zweite Spulenkörper von einer Baueinheit gebildet ist, die den ersten Spulenkörper (16), die erste Spulenwicklung (18) und eine Vergußmasse (24) für die erste Spu- lenwicklung (18) umfaßt.Coil winding (26), characterized in that the second coil body is formed by a structural unit which comprises the first coil body (16), the first coil winding (18) and a casting compound (24) for the first coil winding (18).
2. Stabzündspule nach Anspruch 1, dadurch gekennzeichnet, daß Kontaktierungen (20, 22) für die erste Spulenwicklung (18) in der Vergußmasse (24) eingebettet und Be- standteil der Baueinheit sind.2. pencil ignition coil according to claim 1, characterized in that contacts (20, 22) for the first coil winding (18) embedded in the sealing compound (24) and are part of the structural unit.
3. Stabzündspule nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß eine Rückschlußeinrichtung (34) einen Lustspalt (30) begrenzt, der die Primärwicklung (26) umschließt. 3. pencil ignition coil according to claim 1 or 2, characterized in that a yoke device (34) delimits a pleasure gap (30) which surrounds the primary winding (26).
4. Stabzündspule nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Baugruppe mittels eines Elastomers (62) fixiert ist.4. pencil ignition coil according to claim 1 or 2, characterized in that the assembly is fixed by means of an elastomer (62).
5. Stabzündspule nach Anspruch 4, dadurch gekennzeichnet, daß der Stabkern (14) mittels des Elastomers (62) fixiert ist.5. pencil ignition coil according to claim 4, characterized in that the rod core (14) is fixed by means of the elastomer (62).
6. Stabzündspule nach Anspruch 4 oder 5, dadurch gekenn- zeichnet, daß das Elastomer (62) einen Schutzmantel6. pencil ignition coil according to claim 4 or 5, characterized in that the elastomer (62) has a protective jacket
(66) für eine Zündkerze bildet.(66) for a spark plug.
7. Stabzündspule nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß das Elastomer (62) einen Haltering bzw. Schutzring (68) bildet.7. pencil ignition coil according to one of claims 4 to 6, characterized in that the elastomer (62) forms a retaining ring or protective ring (68).
8. Stabzündspule nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, daß die Primärwicklung (26) zumindest teilweise in dem Elastomer (62) eingebettet ist.8. pencil ignition coil according to one of claims 4 to 7, characterized in that the primary winding (26) is at least partially embedded in the elastomer (62).
Stabzündspule nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, daß das Elastomer (62) eine mechanische Fixierung für das Rückschlußelement (34) und/oder einen Anschlußsteckverbinder (28) bildet. Rod ignition coil according to one of Claims 4 to 8, characterized in that the elastomer (62) forms a mechanical fixation for the yoke element (34) and / or a connecting plug connector (28).
EP03773530A 2002-12-05 2003-10-15 Rod ignition coil Withdrawn EP1576628A2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10256802 2002-12-05
DE10256802A DE10256802B3 (en) 2002-12-05 2002-12-05 Rod ignition coil for automobile IC engine has first coil body, its coil winding and associated resin mass acting as second coil body for second coil winding
PCT/DE2003/003416 WO2004051677A2 (en) 2002-12-05 2003-10-15 Rod ignition coil

Publications (1)

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EP1576628A2 true EP1576628A2 (en) 2005-09-21

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ID=32010502

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EP03773530A Withdrawn EP1576628A2 (en) 2002-12-05 2003-10-15 Rod ignition coil

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US (1) US20060250206A1 (en)
EP (1) EP1576628A2 (en)
DE (1) DE10256802B3 (en)
WO (1) WO2004051677A2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US8854169B2 (en) * 2012-09-14 2014-10-07 Tempel Steel Company Automotive ignition coil having a core with at least one embedded permanent magnet

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
US5870012A (en) * 1995-12-27 1999-02-09 Toyo Denso Kabushiki Kaisha Engine ignition coil device
JPH10199737A (en) * 1996-11-18 1998-07-31 Matsushita Electric Ind Co Ltd Ignition coil device for internal combustion engine
US6332458B1 (en) * 1997-05-23 2001-12-25 Hitachi, Ltd. Ignition coil unit for engine and engine provided with plastic head cover
DE19831196C2 (en) * 1998-07-11 2002-06-13 Audi Ag Ignition coil unit for internal combustion engines
DE19927820C1 (en) * 1998-10-27 2000-07-06 Bremi Auto Elektrik Ernst Brem Rod ignition coil, especially for internal combustion engine, has cylindrical housing containing outer and coil bodies with primary and secondary windings, and central weakly magnetic core
DE19852295A1 (en) * 1998-11-12 2000-05-18 Bayerische Motoren Werke Ag Ignition system for an internal combustion engine
DE29918100U1 (en) * 1999-10-14 2001-02-22 Bosch Gmbh Robert Rod coil for ignition systems
US6556116B2 (en) * 2001-08-20 2003-04-29 Delphi Technologies, Inc. Erosion resistant pencil coil having external secondary winding and shield

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004051677A3 *

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WO2004051677A2 (en) 2004-06-17
WO2004051677A3 (en) 2004-08-19
DE10256802B3 (en) 2004-04-15
US20060250206A1 (en) 2006-11-09

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