EP1440498A1 - Rod coil for ignition systems - Google Patents

Rod coil for ignition systems

Info

Publication number
EP1440498A1
EP1440498A1 EP02782736A EP02782736A EP1440498A1 EP 1440498 A1 EP1440498 A1 EP 1440498A1 EP 02782736 A EP02782736 A EP 02782736A EP 02782736 A EP02782736 A EP 02782736A EP 1440498 A1 EP1440498 A1 EP 1440498A1
Authority
EP
European Patent Office
Prior art keywords
rod coil
housing
filler
coil according
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.)
Granted
Application number
EP02782736A
Other languages
German (de)
French (fr)
Other versions
EP1440498B1 (en
Inventor
Dieter Betz
Wolfram Schoellig
Klaus Lerchmenmueller
Wolfgang Gaede
Christian Hauer
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 EP1440498A1 publication Critical patent/EP1440498A1/en
Application granted granted Critical
Publication of EP1440498B1 publication Critical patent/EP1440498B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/40—Sparking plugs structurally combined with other devices
    • H01T13/44—Sparking plugs structurally combined with other devices with transformers, e.g. for high-frequency ignition
    • 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
    • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
    • 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
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines
    • H01F2038/122—Ignition, e.g. for IC engines with rod-shaped core
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/12—Magnetic shunt paths

Definitions

  • the invention is based on a rod coil for ignition systems, in particular as an ignition coil in internal combustion engines of motor vehicles according to the preamble of claim 1.
  • a rod coil which has a cylindrical housing in the basic form.
  • a rod-shaped core of an open magnetic circuit is arranged in a central position in the housing and within a winding set.
  • the winding set is surrounded concentrically with the interposition of an insulator by a sleeve-shaped longitudinally slotted return tube, which is arranged on an inside, alternatively on an outside of the housing.
  • the function of the return tube is to close the magnetic field of the bar coil.
  • the rod coil for ignition systems according to the invention with the characterizing features of claim 1 has the advantage that the aforementioned inadequacy is avoided.
  • the rod coil is designed so that a packing is arranged between the return tube and the housing. By means of this packing, the housing fits snugly against the return tube, so that no partial electrical discharges take place during operation of the rod coil and the rod coil is protected from failure due to the deterioration of its insulation.
  • the single figure shows the rod coil in a longitudinal section, in which a filler body between a return tube and a housing of the rod coil is shown oversized for better visibility.
  • a rod coil 11 for ignition systems according to the figure, in particular as an ignition coil in internal combustion engines of motor vehicles, is provided for direct contacting with a spark plug, which is inserted in a shaft in the cylinder head of an internal combustion engine in the usual and not shown manner.
  • the rod coil 11 contains an elongated, cylindrical core 14, which is also referred to as an I-core.
  • the core 14 consists of layered magnetizable material and is part of an open magnetic circuit.
  • a low-voltage primary winding 16 and a high-voltage secondary winding 17 are arranged concentrically around the core 14 on the inside.
  • the windings 16, 17 are surrounded by a return tube 18 made of a magnetizable material for guiding the magnetic field of the rod coil 11, which is mounted on an inside 19 of the housing 13.
  • a return tube 18 made of a magnetizable material for guiding the magnetic field of the rod coil 11, which is mounted on an inside 19 of the housing 13.
  • Yoke tube 18 can also be attached to an outer side 21 of the housing 13.
  • the yoke tube 18 is slotted parallel to the longitudinal axis 12 to prevent a short circuit of the magnetic field.
  • a filler 22 is arranged between the return tube 18 and the housing 13, in the exemplary embodiment shown here between the return tube 18 and the inside 19 of the housing 13.
  • This filler 22 can be designed as a hot melt adhesive and for example made of
  • Polyolefin, polyamide or made of a silicone-based fabric are examples of polyolefin, polyamide or made of a silicone-based fabric.
  • the filler 22 can consist of an epoxy resin coating, which can be both electrically conductive and electrically insulating and is attached to the housing 13 or the return tube 18.
  • the filler body 22 could surround the housing 13 with a return tube 18 on the outside 21 of the Housing 13 are applied, but especially when the filler 22 consists of a shrink tube.
  • the packing 22 can produce an intimate, gapless bond between the return tube 18 and the housing 13.
  • electrical partial discharges are avoided when the rod coil 11 is operated on it. This prevents failure of the rod coil 11 due to the deterioration of its insulation.

Landscapes

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

Abstract

The invention relates to a rod coil (11) for ignition systems, said rod coil being especially used as an ignition coil in internal combustion engines of motor vehicles. The aim of the invention is to produce one such rod coil in such a way that it is permanently functionally reliable. The inventive rod coil (11) comprises a core (14), in its centre, which is embodied as an inner magnetic iron core, and a return tube (18) which is embodied as an outer magnetic iron core and is positioned on a plastic housing (13). A filler (22) is applied between the return tube (18) and the housing (13) in order to avoid partial discharges during the operation of the rod coil (11), in such a way that an intimate continuous structure is formed between the return tube (18) and the housing (13).

Description

Stabspule für ZündanlagenRod coil for ignition systems
Stand der TechnikState of the art
Die Erfindung geht aus von einer Stabspule für Zündanlagen, insbesondere als Zündspule in Brennkraftmaschinen von Kraftfahrzeugen nach der Gattung des Anspruchs 1.The invention is based on a rod coil for ignition systems, in particular as an ignition coil in internal combustion engines of motor vehicles according to the preamble of claim 1.
Durch die DE 196 23 399 C2 ist eine Stabspule bekannt, die ein in der Grundform zylindrisches Gehäuse aufweist. In dem Gehäuse und innerhalb eines Wicklungssatzes ist in zentraler Lage ein stabför iger Kern eines offenen Magnetkreises angeordnet. Zur Führung des Magnetfeldes ist der Wicklungssatz unter Zwischenlage eines Isolators von einem hülsenförmigen längsgeschlitzten Rückschlußrohr konzentrisch umgeben, das an einer Innenseite, alternativ an einer Außenseite des Gehäuses angeordnet ist. Aufgabe des Rückschlußrohres ist es, das Magnetfeld der Stabspule zu schließen.From DE 196 23 399 C2 a rod coil is known which has a cylindrical housing in the basic form. A rod-shaped core of an open magnetic circuit is arranged in a central position in the housing and within a winding set. To guide the magnetic field, the winding set is surrounded concentrically with the interposition of an insulator by a sleeve-shaped longitudinally slotted return tube, which is arranged on an inside, alternatively on an outside of the housing. The function of the return tube is to close the magnetic field of the bar coil.
Durch fertigungstechnisch bedingte, nicht zu vermeidende Formungenauigkeiten des Rückschlußrohrs und des Gehäuses kommt es bei der Anlage des Rückschlußrohres an das Gehäuses zwischen beiden Körpern zu luftgefüllten Hohlräumen. An diesen Fehlstellen bilden sich beim Betrieb der Stabspule elektrische Teilentladungen, die langfristig durch Materialabtrag die Isolation der Stabspule verschlechtern und zu einem Ausfall der Stabspule führen können.Manufacturing-related, inevitable inaccuracies in shape of the return tube and the housing result in air-filled cavities when the return tube is in contact with the housing between the two bodies. At these imperfections, electrical partial discharges are formed during operation of the rod coil, which are long-term Material removal can impair the insulation of the rod coil and lead to failure of the rod coil.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Stabspule für Zündanlagen mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß die zuvor erwähnte Unzulänglichkeit vermieden wird. Dazu ist die Stabspule so ausgebildet, daß zwischen Rückschlußrohr und Gehäuse ein Füllkörper angeordnet ist. Durch diesen Füllkörper schmiegt sich das Gehäuse lückenlos an das Rückschlußrohr an, so daß beim Betrieb der Stabspule keine elektrische Teilentladungen stattfinden und die Stabspule vor einem Ausfall durch die Verschlechterung ihrer Isolation geschützt ist.The rod coil for ignition systems according to the invention with the characterizing features of claim 1 has the advantage that the aforementioned inadequacy is avoided. For this purpose, the rod coil is designed so that a packing is arranged between the return tube and the housing. By means of this packing, the housing fits snugly against the return tube, so that no partial electrical discharges take place during operation of the rod coil and the rod coil is protected from failure due to the deterioration of its insulation.
In den Unteransprüchen sind vorteilhafte Ausgestaltungen für die Realisierung der Erfindung angegeben.Advantageous refinements for realizing the invention are specified in the subclaims.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der Figurenbeschreibung näher erläutert. Die einzige Figur zeigt die Stabspule in einem Längsschnitt, bei dem ein Füllkörper zwischen einem Rückschlußrohr und einem Gehäuse der Stabspule zur besseren Sichtbarkeit überdimensioniert wiedergegeben ist.An embodiment of the invention is shown in the drawing and explained in more detail in the description of the figures. The single figure shows the rod coil in a longitudinal section, in which a filler body between a return tube and a housing of the rod coil is shown oversized for better visibility.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Eine Stabspule 11 für Zündanlagen nach der Figur, insbesondere als Zündspule in Brennkraftmaschinen von Kraftfahrzeugen, ist zur Direktkontaktierung mit einer Zündkerze vorgesehen, die in üblicher und nicht mehr dargestellter Weise in einem Schacht im Zylinderkopf einer Brennkraftmaschine eingesetzt ist. Die Stabspule 11 enthält im koaxialer Anordnung zu einer Längsachse 12 in einem Gehäuse 13 aus Kunststoff einen länglichen, zylindrischen Kern 14, der auch als I-Kern bezeichnet wird. Der Kern 14 besteht aus geschichtetem magnetisierbaren Material und ist Teil eines offenen Magnetkreises. Konzentrisch um den Kern 14 ist innenliegend eine Niederspannung führende Primärwicklung 16 und außenliegend eine Hochspannung führende Sekundärwicklung 17 angeordnet.A rod coil 11 for ignition systems according to the figure, in particular as an ignition coil in internal combustion engines of motor vehicles, is provided for direct contacting with a spark plug, which is inserted in a shaft in the cylinder head of an internal combustion engine in the usual and not shown manner. In a coaxial arrangement with a longitudinal axis 12 in a plastic housing 13, the rod coil 11 contains an elongated, cylindrical core 14, which is also referred to as an I-core. The core 14 consists of layered magnetizable material and is part of an open magnetic circuit. A low-voltage primary winding 16 and a high-voltage secondary winding 17 are arranged concentrically around the core 14 on the inside.
Die Wicklungen 16, 17 sind zur Führung des Magnetfeldes des Stabspule 11 von einem Rückschlußrohr 18 aus einem magnetisierbaren Material umgeben, das an einer Innenseite 19 des Gehäuses 13 gelagert ist. Alternativ könnte dasThe windings 16, 17 are surrounded by a return tube 18 made of a magnetizable material for guiding the magnetic field of the rod coil 11, which is mounted on an inside 19 of the housing 13. Alternatively, that could be
Rückschlußrohr 18 auch an einer Außenseite 21 des Gehäuses 13 angebracht sein. Das Rückschlußrohr 18 ist parallel zur Längsachse 12 geschlitzt, um einen Kurzschluß des Magnetfeldes zu verhindern.Yoke tube 18 can also be attached to an outer side 21 of the housing 13. The yoke tube 18 is slotted parallel to the longitudinal axis 12 to prevent a short circuit of the magnetic field.
Zwischen dem Rückschlußrohr 18 und dem Gehäuse 13, bei dem hier dargestellten Ausführungsbeispiel zwischen dem Rückschlußrohr 18 und der Innenseite 19 des Gehäuses 13, ist ein Füllkörper 22 angeordnet. Dieser Füllkörper 22 kann als ein Schmelzkleber ausgeführt sein und beispielsweise ausA filler 22 is arranged between the return tube 18 and the housing 13, in the exemplary embodiment shown here between the return tube 18 and the inside 19 of the housing 13. This filler 22 can be designed as a hot melt adhesive and for example made of
Polyolefin, Polyamid oder aus einem Stoff auf Silikonbasis bestehen.Polyolefin, polyamide or made of a silicone-based fabric.
Des weiteren kann der Füllkörper 22 aus einer Epoxidharzbeschichtung bestehen, die sowohl elektrisch leitfähig als auch elektrisch isolierend sein kann und am Gehäuse 13 oder am Rückschlußrohr 18 angebracht ist.Furthermore, the filler 22 can consist of an epoxy resin coating, which can be both electrically conductive and electrically insulating and is attached to the housing 13 or the return tube 18.
Alternativ könnte der Füllkörper 22 bei einem das Gehäuse 13 umgebenden Rückschlußrohr 18 an der Außenseite 21 des Gehäuses 13 aufgebracht werden, insbesondere jedoch dann, wenn der Füllkörper 22 aus einem Schrumpfschlauch besteht.Alternatively, the filler body 22 could surround the housing 13 with a return tube 18 on the outside 21 of the Housing 13 are applied, but especially when the filler 22 consists of a shrink tube.
In jedem Fall kann durch den Füllkörper 22 ein inniger, lückenloser Verband zwischen dem Rückschlußrohr 18 und dem Gehäuse 13 hergestellt werden. Durch diese Vermeidung von Hohlräumen zwischen dem Rückschlußrohr 18 und dem Gehäuse 13 werden beim Betrieb der Stabspule 11 an dieser elektrische Teilentladungen vermieden. Damit ist einem Ausfall der Stabspule 11 durch die Verschlechterung ihrer Isolation vorgebeugt . In any case, the packing 22 can produce an intimate, gapless bond between the return tube 18 and the housing 13. By avoiding voids between the return tube 18 and the housing 13, electrical partial discharges are avoided when the rod coil 11 is operated on it. This prevents failure of the rod coil 11 due to the deterioration of its insulation.

Claims

Ansprüche Expectations
1. Stabspule für Zündanlagen, insbesondere als Zündspule in Brennkraftmaschinen von Kraftfahrzeugen, mit einem in der Grundform hohlzylindrischen Gehäuse (13), in dem in zentraler Lage ein Kern (14) als innerer magnetischer Eisenkern und an dem ein Rückschlußkörper (18) als äußerer magnetischer Eisenkern gelagert ist, dadurch gekennzeichnet, daß zwischen Gehäuse (13) und Rückschlußkörper (18) ein Füllkörper (22) angeordnet ist.1. rod coil for ignition systems, especially as an ignition coil in internal combustion engines of motor vehicles, with a hollow cylindrical housing in the basic form (13) in which a core (14) in the central position as an inner magnetic iron core and on which a yoke body (18) as an outer magnetic Iron core is mounted, characterized in that a filler (22) is arranged between the housing (13) and the yoke body (18).
2. Stabspule nach Anspruch 1, dadurch gekennzeichnet, daß der Füllkörper (22) an einer Außenseite (21) des Gehäuses2. rod coil according to claim 1, characterized in that the filling body (22) on an outer side (21) of the housing
(13) angebracht ist.(13) is attached.
3. Stabspule nach Anspruch 1, dadurch gekennzeichnet, daß der Füllkörper (22) an einer Innenseite (19) des Gehäuses (13) angebracht ist.3. rod coil according to claim 1, characterized in that the filler (22) on an inner side (19) of the housing (13) is attached.
4. Stabspule nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Füllkörper (22) ein Schmelzkleber ist.4. rod coil according to one of the preceding claims, characterized in that the filler (22) is a hot melt adhesive.
5. Stabspule nach Anspruch 4, dadurch gekennzeichnet, daß der Füllkörper (22) ein Schmelzkleber aus Polyolefin ist.5. rod coil according to claim 4, characterized in that the filling body (22) is a hot melt adhesive made of polyolefin.
6. Stabspule nach Anspruch 4, dadurch gekennzeichnet, daß der Füllkörper (22) ein Schmelzkleber aus Polyamid ist. 6. rod coil according to claim 4, characterized in that the filler (22) is a hot melt adhesive made of polyamide.
7. Stabspule nach Anspruch 4, dadurch gekennzeichnet, daß der Füllkörper (22) ein Schmelzkleber auf Silikonbasis ist.7. rod coil according to claim 4, characterized in that the filler (22) is a hot melt adhesive based on silicone.
8. Stabspule nach einem der Ansprüche 1-3, dadurch gekennzeichnet, daß der Füllkörper (22) eine8. rod coil according to one of claims 1-3, characterized in that the filling body (22)
Epoxidharzbeschichtung ist.Is epoxy resin coating.
9. Stabspule nach Anspruch 8, dadurch gekennzeichnet, daß die Epoxidharzbeschichtung als Füllkörper (22) elektrisch leitfähig ist.9. rod coil according to claim 8, characterized in that the epoxy resin coating as a filler (22) is electrically conductive.
10. Stabspule nach Anspruch 8, dadurch gekennzeichnet, daß die Epoxidharzbeschichtung als Füllkörper (22) elektrisch isolierend ist.10. rod coil according to claim 8, characterized in that the epoxy resin coating as a filler (22) is electrically insulating.
11. Stabspule nach Anspruch 2, dadurch gekennzeichnet, daß der Füllkörper (22) ein Schrumpfschlauch ist, der auf der Außenseite (21) des Gehäuses (13) angebracht ist. 11. Rod coil according to claim 2, characterized in that the filling body (22) is a shrink tube which is attached to the outside (21) of the housing (13).
EP02782736A 2001-10-23 2002-10-21 Rod coil for ignition systems Expired - Lifetime EP1440498B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10152177A DE10152177A1 (en) 2001-10-23 2001-10-23 Rod coil for ignition systems
DE10152177 2001-10-23
PCT/DE2002/003963 WO2003038959A1 (en) 2001-10-23 2002-10-21 Rod coil for ignition systems

Publications (2)

Publication Number Publication Date
EP1440498A1 true EP1440498A1 (en) 2004-07-28
EP1440498B1 EP1440498B1 (en) 2005-04-13

Family

ID=7703368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02782736A Expired - Lifetime EP1440498B1 (en) 2001-10-23 2002-10-21 Rod coil for ignition systems

Country Status (5)

Country Link
US (1) US6842099B2 (en)
EP (1) EP1440498B1 (en)
JP (1) JP4288167B2 (en)
DE (2) DE10152177A1 (en)
WO (1) WO2003038959A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6845764B1 (en) * 2004-01-08 2005-01-25 Delphi Technologies, Inc. Ignition apparatus with secondary winding having reduced breakdown failures
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
US7969268B2 (en) * 2008-08-15 2011-06-28 Federal Mogul Ignition Company Ignition coil with spaced secondary sector windings

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JPH09501364A (en) * 1993-08-06 1997-02-10 ミネソタ マイニング アンド マニュファクチャリング カンパニー Chlorine-free multilayer film medical device assembly
DE69609465T2 (en) * 1995-08-25 2002-03-14 Denso Corp., Kariya Inclined winding electromagnet and ignition coil using this winding for an internal combustion engine
DE19623399C2 (en) 1996-06-12 1998-07-16 Bremicker Auto Elektrik Ignition coil for internal combustion engines
EP0827163B1 (en) * 1996-08-31 2001-09-05 Toyo Denso Kabushiki Kaisha Engine igniting coil device
DE19702438C2 (en) * 1997-01-24 1999-05-06 Bremicker Auto Elektrik Rod ignition coil for internal combustion engines
JP3449183B2 (en) * 1997-05-22 2003-09-22 株式会社デンソー Ignition coil
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JP3422252B2 (en) * 1998-04-22 2003-06-30 株式会社日立製作所 High voltage transformer and ignition transformer using it
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Also Published As

Publication number Publication date
EP1440498B1 (en) 2005-04-13
US20040075517A1 (en) 2004-04-22
DE50202800D1 (en) 2005-05-19
JP2005507058A (en) 2005-03-10
DE10152177A1 (en) 2003-04-30
WO2003038959A1 (en) 2003-05-08
JP4288167B2 (en) 2009-07-01
US6842099B2 (en) 2005-01-11

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