WO1999049212A1 - Rod coil for ignition systems - Google Patents

Rod coil for ignition systems Download PDF

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Publication number
WO1999049212A1
WO1999049212A1 PCT/DE1998/003664 DE9803664W WO9949212A1 WO 1999049212 A1 WO1999049212 A1 WO 1999049212A1 DE 9803664 W DE9803664 W DE 9803664W WO 9949212 A1 WO9949212 A1 WO 9949212A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
coil
rod coil
return plate
wall
Prior art date
Application number
PCT/DE1998/003664
Other languages
German (de)
French (fr)
Inventor
Reinhard Seidl
Lothar Detels
Thomas Breckle
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 WO1999049212A1 publication Critical patent/WO1999049212A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • 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

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 shape.
  • 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 concentrically surrounded by an insulator with the interposition of an insulator, which is mounted on the inner circumferential surface of the housing.
  • the insulator which is usually embodied by a thin-walled plastic tube, is alternatively formed by a layer, as in the abovementioned prior art Synthetic resin material formed, the manufacture of the rod coil is made more difficult, since the rod coil is built for reasons of installation closely nested in the radial direction. This makes it difficult from a manufacturing point of view to fill this narrow cavity with cast resin in a short cycle time without blowholes.
  • the rod coil for ignition systems according to the invention with the characterizing features of claim 1 has the advantage that the aforementioned shortcomings are avoided.
  • the rod coil is designed so that the yoke plate is enclosed by the housing and the housing also forms the insulator. Because of this, these are
  • FIG. 1 An embodiment of the invention is shown in the drawing and explained in more detail in the description of the figures.
  • the figure shows the rod coil in a sectional view.
  • 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 12, which is conventional and no longer used - 3 -
  • the rod coil 11 contains, in a central position, an elongated, cylindrical core 16, which is also referred to as an I-core, in a plastic housing 14 in a central position.
  • the core 16 consists of layered magnetic material and is part of an open magnetic circuit.
  • a low-voltage primary winding 17 is arranged concentrically around the core 16 and a high-voltage secondary winding 18 is arranged on the outside.
  • the windings 17, 18, which together form a winding set 19, are for guiding the magnetic field of one
  • the wall 22 is divided into a first partial wall 23, which is attached to the yoke plate 21 on the inside, pointing towards the core 16, and in a second partial wall 24, which is the yoke plate 21, which is not shown, parallel to the longitudinal axis 13 is slotted to one
  • the first partial wall 23 forms an insulator 26, which ensures that the adjacent high voltage in the
  • Secondary winding 18 does not break through to the electrically conductive yoke plate 21 and this forms a short-circuit bridge for the secondary winding 18.

Landscapes

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

Abstract

The invention relates to a rod coil for ignition systems, which is especially used as an ignition coil in the internal combustion engines of motor vehicles. The aim of the invention is to produce a functionally reliable coil as easily as possible. The inventive coil (11) is provided with a housing (14). An electrically and magnetically conductive return plate (21) is inserted into the wall of said housing as part of an open magnetic circuit. The return plate (21) is electrically insulated against an inner set of windings (19) with an adjacent secondary winding that conducts high voltage by means of a first partial wall (23). The return plate (21) is covered with an outboard second partial wall (24). Preferably, the rod coil (11) is used in the automobile industry.

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 41 32 851 AI ist eine Stabspule bekannt, die ein in der Grundform zylindrisches Gehäuse auf eist . In dem Gehäuse und innerhalb eines Wicklungssatzes ist in zentraler Lage ein stabförmiger Kern eines offenen Magnetkreises angeordnet. Zur Führung des Magnetfeldes ist der Wicklungssatz unter Zwischenlage eines Isolators von einem längsgeschlitzten Rückschlußblech konzentrisch umgeben, das an der inneren Umfangsoberflache des Gehäuses montiert ist.From DE 41 32 851 AI a rod coil is known which has a cylindrical housing in the basic shape. A rod-shaped core of an open magnetic circuit is arranged in a central position in the housing and within a winding set. For guiding the magnetic field, the winding set is concentrically surrounded by an insulator with the interposition of an insulator, which is mounted on the inner circumferential surface of the housing.
Die Herstellung einer solchermaßen aufgebauten Stabspule ist fertigungstechnisch ungünstig, da der Isolator, das Rückschlußblech und das Gehäuse voneinander einzeln zu handhabende Teile sind, die räumlich einander zugeordnet werden müssen.The manufacture of a rod coil constructed in this way is disadvantageous in terms of production technology, since the insulator, the return plate and the housing are parts which can be handled individually from one another and must be spatially assigned to one another.
Wird der Isolator, der üblicherweise durch ein dünnwandiges Kunststoffröhr verkörpert ist, wie im obengenannten Stand der Technik alternativ durch eine Schicht aus Kunstharzmaterial gebildet, so wird die Fertiung der Stabspule weiter erschwert, da die Stabspule aus Einbaugründen in radialer Richtung eng geschachtelt gebaut ist. Dadurch ist es fertigungstechnisch schwierig, diesen engen Hohlraum in einer kleinen Taktzeit lunkerfrei mit Gießharz zu verfüllen.The insulator, which is usually embodied by a thin-walled plastic tube, is alternatively formed by a layer, as in the abovementioned prior art Synthetic resin material formed, the manufacture of the rod coil is made more difficult, since the rod coil is built for reasons of installation closely nested in the radial direction. This makes it difficult from a manufacturing point of view to fill this narrow cavity with cast resin in a short cycle time without blowholes.
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 erwähnten Unzulänglichkeiten vermieden werden. Dazu ist die Stabspule so ausgebildet, daß das Rückschlußblech von dem Gehäuse umschlossen ist und das Gehäuse zugleich den Isolator bildet. Dadurch sind dieseThe rod coil for ignition systems according to the invention with the characterizing features of claim 1 has the advantage that the aforementioned shortcomings are avoided. For this purpose, the rod coil is designed so that the yoke plate is enclosed by the housing and the housing also forms the insulator. Because of this, these are
Funktionselemente zu einem Bauteil vereinheitlicht und die Fertigung der Stabspule gegenüber dem Stand der Technik vereinfacht .Functional elements standardized into one component and the manufacture of the rod coil simplified compared to the prior art.
In dem Unteranspruch ist eine vorteilhafte Ausgestaltung für die Realisierung der Erfindung angegeben.An advantageous embodiment for realizing the invention is specified in the subclaim.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der Figurenbeschreibung näher erläutert. Die Figur zeigt die Stabspule in einer Schnittdarsteilung.An embodiment of the invention is shown in the drawing and explained in more detail in the description of the figures. The figure shows the rod coil in a sectional view.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Eine Stabspule 11 für Zündanlagen nach der Figur, insbesondere als Zündspule in Brennkra tmaschinen von Kraftfahrzeugen, ist zur Direktkontak ierung mit einer Zündkerze 12 vorgesehen, die in üblicher und nicht mehr - 3 -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 12, which is conventional and no longer used - 3 -
dargestellter Weise in einem Schacht im Zylinderkopf einer Brennkraftmaschine eingesetzt ist.shown is used in a shaft in the cylinder head of an internal combustion engine.
Die Stabspule 11 enthält in koaxialer Anordnung zu einer Längsachse 13 unter anderem in einem Gehäuse 14 aus Kunststoff in zentraler Lage einen länglichen, zylindrischen Kern 16, der auch als I-Kern bezeichnet wird. Der Kern 16 besteht aus geschichtetem magnetischem Material und ist Teil eines offenen Magnetkreises .In a coaxial arrangement with respect to a longitudinal axis 13, the rod coil 11 contains, in a central position, an elongated, cylindrical core 16, which is also referred to as an I-core, in a plastic housing 14 in a central position. The core 16 consists of layered magnetic material and is part of an open magnetic circuit.
Konzentrisch um den Kern 16 ist innenliegend eine Niederspannung führende Primärwicklung 17 und außenliegend eine Hochspannung führende Sekundärwicklung 18 angeordnet. Die Wicklungen 17, 18, die zusammen einen Wicklungssatz 19 bilden, sind zur Führung des Magnetfeldes von einemA low-voltage primary winding 17 is arranged concentrically around the core 16 and a high-voltage secondary winding 18 is arranged on the outside. The windings 17, 18, which together form a winding set 19, are for guiding the magnetic field of one
Rückschlußblech 21 umgeben, daß in einer hülsenförmigen Wandung 22 des Gehäuses 14 im Kunststoffspritzverfahren eingesetzt ist.Surround back plate 21 that is used in a sleeve-shaped wall 22 of the housing 14 in the plastic injection molding process.
Im Bereich des Rückschlußbleches 21 ist die Wandung 22 gegliedert in eine erste Teilwandung 23, die an dem Rückschlußblech 21 innenliegend, zum Kern 16 hinweisend, angebracht ist und in eine zweite Teilwandung 24, die das Rückschlußblech 21, das in nicht dargestellter Weise parallel zur Längsachse 13 geschlitzt ist, um einenIn the area of the yoke plate 21, the wall 22 is divided into a first partial wall 23, which is attached to the yoke plate 21 on the inside, pointing towards the core 16, and in a second partial wall 24, which is the yoke plate 21, which is not shown, parallel to the longitudinal axis 13 is slotted to one
Kurzschluß des Magnetfeldes zu verhindern, außenliegend abdeckt .To prevent short circuit of the magnetic field, covers the outside.
Die erste Teilwandung 23 bildet einen Isolator 26, der sicherstellt, daß die benachbarte Hochspannung in derThe first partial wall 23 forms an insulator 26, which ensures that the adjacent high voltage in the
Sekundärwicklung 18 nicht zu dem elektrisch leitfähigen Rückschlußblech 21 durchschlägt und dieses eine Kurzschlußbrücke für die Sekundärwicklung 18 bildet. Mit der Zusammenfassung der Funktionselemente Isolator 26, Rückschlußblech 21 und Gehäuse 14 zu einem Montageteil ist ein Aufbau der Stabspule 11 verwirklicht, der eine einfache, funktionssichere Fertigung der Stabspule 11 ermöglicht. Secondary winding 18 does not break through to the electrically conductive yoke plate 21 and this forms a short-circuit bridge for the secondary winding 18. With the combination of the functional elements insulator 26, yoke plate 21 and housing 14 to form an assembly part, a structure of the rod coil 11 is realized, which enables simple, functionally reliable manufacture of the rod coil 11.

Claims

Ansprüche Expectations
1. Stabspule für Zündanlagen, insbesondere als Zündspule in Brennkraftmaschinen von Kraftfahrzeugen, mit einem Gehäuse (14) , in dem als Teil eines offenen Magnetkreises ein Kern (16) als innerer magnetischer Eisenkern und ein Rückschlußblech (21) als äußerer magnetischer Eisenkern gelagert ist und mit einem, das Rückschlußblech (21) gegenüber einem, konzentrisch um den Kern (16) angeordneten Wicklungssatz (19) elektrisch isolierenden Isolator (26) , dadurch gekennzeichnet, daß das Rückschlußblech (21) von dem Gehäuse (14) umschlossen ist und das Gehäuse (14) den Isolator (26) bildet.1. rod coil for ignition systems, in particular as an ignition coil in internal combustion engines of motor vehicles, with a housing (14) in which, as part of an open magnetic circuit, a core (16) as the inner magnetic iron core and a return plate (21) as the outer magnetic iron core is mounted and with an insulator (26) electrically insulating the return plate (21) relative to a winding set (19) arranged concentrically around the core (16), characterized in that the return plate (21) is enclosed by the housing (14) and the housing (14) forms the insulator (26).
2. Stabspule nach Anspruch 1, dadurch gekennzeichnet, daß das Gehäuse (14) eine hülsenförmige Wandung (22) aufweist, die in dem Bereich des Rückschlußbleches (21) in eine erste TeiIwandung (23) und in eine zweite TeiIwandung (24) gegliedert ist und die jeweilige Wandstärke einer jeden der Teilwandungen (23, 24) zumindest annähernd gleich ist. 2. rod coil according to claim 1, characterized in that the housing (14) has a sleeve-shaped wall (22) which in the region of the yoke plate (21) is divided into a first partial wall (23) and a second partial wall (24) and the respective wall thickness of each of the partial walls (23, 24) is at least approximately the same.
PCT/DE1998/003664 1998-03-25 1998-12-14 Rod coil for ignition systems WO1999049212A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29805372U DE29805372U1 (en) 1998-03-25 1998-03-25 Rod coil for ignition systems
DE29805372.1 1998-03-25

Publications (1)

Publication Number Publication Date
WO1999049212A1 true WO1999049212A1 (en) 1999-09-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
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DE (1) DE29805372U1 (en)
WO (1) WO1999049212A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1580771A3 (en) * 2004-03-26 2006-04-19 Beru AG Ignition coil and method to manufacture it

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4132851A1 (en) 1990-10-03 1992-04-16 Mitsubishi Electric Corp IGNITION COIL UNIT FOR AN INTERNAL COMBUSTION ENGINE
DE4330072A1 (en) * 1993-09-06 1995-03-09 Bayerische Motoren Werke Ag Ignition coil set for multi-cylinder internal combustion engines
EP0738831A2 (en) * 1995-04-21 1996-10-23 Hitachi, Ltd. Ignition coil for internal combustion engine
EP0796993A2 (en) * 1996-03-21 1997-09-24 Hitachi, Ltd. Ignition apparatus for use in internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4132851A1 (en) 1990-10-03 1992-04-16 Mitsubishi Electric Corp IGNITION COIL UNIT FOR AN INTERNAL COMBUSTION ENGINE
DE4330072A1 (en) * 1993-09-06 1995-03-09 Bayerische Motoren Werke Ag Ignition coil set for multi-cylinder internal combustion engines
EP0738831A2 (en) * 1995-04-21 1996-10-23 Hitachi, Ltd. Ignition coil for internal combustion engine
EP0796993A2 (en) * 1996-03-21 1997-09-24 Hitachi, Ltd. Ignition apparatus for use in internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1580771A3 (en) * 2004-03-26 2006-04-19 Beru AG Ignition coil and method to manufacture it

Also Published As

Publication number Publication date
DE29805372U1 (en) 1999-08-05

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