EP0250834A1 - Ignition coil, particularly an ignition coil for the ignition devices of internal-combustion engines - Google Patents

Ignition coil, particularly an ignition coil for the ignition devices of internal-combustion engines Download PDF

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Publication number
EP0250834A1
EP0250834A1 EP87107380A EP87107380A EP0250834A1 EP 0250834 A1 EP0250834 A1 EP 0250834A1 EP 87107380 A EP87107380 A EP 87107380A EP 87107380 A EP87107380 A EP 87107380A EP 0250834 A1 EP0250834 A1 EP 0250834A1
Authority
EP
European Patent Office
Prior art keywords
ignition
ignition coil
wedge
sleeve
coil
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Withdrawn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
EP87107380A
Other languages
German (de)
French (fr)
Inventor
Eduardo Ramirez
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 EP0250834A1 publication Critical patent/EP0250834A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support

Definitions

  • the invention relates to an ignition coil, in particular an ignition coil for ignition systems of internal combustion engines according to the preamble of claim 1.
  • Ignition coils designed in this way have as an elastic element a spreading spring made of spring plate, which is inserted between the core and the adjacent winding and which has a radial pressure with respect to the coil axis generated, which secures the iron core in the winding.
  • the disadvantage of this spreading spring is its relatively short length, which means that instability of the core in the winding cannot be ruled out; in addition, oxidation of the spreading spring can cause disadvantages.
  • the problem set out in the aforementioned prior art is solved with technically simple means and a stable fastening of the iron core in the winding is achieved.
  • the rubber part results in a dampened fastening of the iron core in the winding.
  • An ignition coil for ignition systems of internal combustion engines has a housing 10 made of insulating material, which has the shape of a ring trough with a jacket 11 coaxial with the axis 12, a bottom 13 and a likewise coaxial sleeve 14, which is rectangular in cross section to the axis 12 and one Through opening 15 forms. This is conical with the larger opening 16.
  • a winding support 18 with two windings 17 (primary and secondary winding) is attached.
  • a wedge 21 made of soft rubber (rubber part) has a rectangular cross section with a pulling surface parallel to the axis 12, that is to say the surface which forms the taper. The width of the wedge 21 transversely to the plane of the drawing corresponds approximately to the width of the side surface 22 of the iron core 19.
  • the action of the wedge 21 causes the core 19 to come into contact with the sleeve 14 on all sides and consequently to their mutual fastening.
  • Figure 2 shows the variant of the wedge 31 made of soft rubber, the cross section of which has the shape of a triangle.
  • the base 32 of the wedge 31 lies on the side surface 22 (FIG. 1) of the core 19, while the edge 33 opposite the base 32 interacts with the through opening 15 of the sleeve 12.
  • the width of the base surface 32 corresponds approximately to the width of the side surface 22.

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

Abstract

The ignition coil for the ignition devices of internal-combustion engines has the housing (10) with the jacket (11), the base (13) and the central sleeve (14), of quadrilateral cross-section. The windings (17) are arranged on this sleeve and the iron core (19) is mounted therein by means of a wedge (21) of soft rubber. This wedge (21) abuts onto the one side surface (22) of the iron core (19) and onto the opposite inner surface of the sleeve (14). In this way, stable mounting of the iron core (19) in the housing (10) is achieved. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung betrifft eine Zündspule, insbesondere eine Zündspule für Zündanlagen von Brennkraftmaschinen nach der Gattung der An­spruchs 1. Derart ausgeführte Zündspulen haben als elastisches Ele­ment eine Spreizfeder aus Federblech, die zwischen dem Kern und der benachbarten Wicklung eingesteckt ist und die bezüglich der Spulen­achse einen radialen Druck erzeugt, der den Eisenkern in der Wick­lung sichert. Nachteilig an dieser Spreizfeder ist deren verhältnis­mäßig kurze Länge, wodurch eine Instabilität des Kernes in der Wick­lung nicht ausgeschlossen ist; darüber hinaus kann eine Oxydation der Spreizfeder Nachteile hervorrufen.The invention relates to an ignition coil, in particular an ignition coil for ignition systems of internal combustion engines according to the preamble of claim 1. Ignition coils designed in this way have as an elastic element a spreading spring made of spring plate, which is inserted between the core and the adjacent winding and which has a radial pressure with respect to the coil axis generated, which secures the iron core in the winding. The disadvantage of this spreading spring is its relatively short length, which means that instability of the core in the winding cannot be ruled out; in addition, oxidation of the spreading spring can cause disadvantages.

Vorteile der ErfindungAdvantages of the invention

Mit der Zündspule, insbesondere der Zündspule für Zündanlagen von Brennkraftmaschinen, nach der Erfindung wird das im vorerwähnten Stand der Technik dargelegte Problem mit technisch einfachen Mitteln gelöst und eine stabile Befestigung des Eisenkerns in der Wicklung erreicht. Darüber hinaus ergibt das Gummiteil eine gedämpfte Befes­tigung des Eisenkerns in der Wicklung.With the ignition coil, in particular the ignition coil for ignition systems of internal combustion engines, according to the invention, the problem set out in the aforementioned prior art is solved with technically simple means and a stable fastening of the iron core in the winding is achieved. In addition, the rubber part results in a dampened fastening of the iron core in the winding.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteran­sprüchen beschrieben. Mit Anspruch 3 und insbesondere in der Weiter­bildung gemäß Anspruch 4 wird die Befestigung des Kernes in der Wicklung weiter erhöht.Advantageous developments of the invention are described in the subclaims. With claim 3 and in particular in the development according to claim 4, the attachment of the core in the winding is further increased.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung darge­stellt und in der Figurenbeschreibung näher erläutert. Es zeigen:

  • Figur 1 die Zündspule für Zündanlagen von Brennkraftmaschinen in teilweisem Axialschnitt und unmaßstäblicher Prinzipdarstellung; und
  • Figur 2 die Variante des Gummikeiles in raumbildlicher, unmaßstäb­licher Darstellung.
An embodiment of the invention is shown in the drawing and explained in more detail in the description of the figures. Show it:
  • FIG. 1 shows the ignition coil for ignition systems of internal combustion engines in a partial axial section and an unscaled schematic diagram; and
  • Figure 2 shows the variant of the rubber wedge in spatial representation, not to scale.

Beschreibung des AusführungsbeispielesDescription of the embodiment

Eine Zündspule für Zündanlagen von Brennkraftmaschinen hat ein aus Isoliermaterial gefertigtes Gehäuse 10, das die Form einer Ringwanne hat mit einem zur Achse 12 koaxialen Mantel 11, einem Boden 13 und einer ebenfalls koaxialen Hülse 14, die im Schnitt quer zur Achse 12 rechteckförmig ist und eine Durchgangsöffnung 15 bildet. Diese ist konisch mit der größeren Öffnung 16. Auf der Hülse 14 ist ein Wick­lungsträger 18 mit zwei Wicklungen 17 (Primär- und Sekundärwicklung) befestigt.An ignition coil for ignition systems of internal combustion engines has a housing 10 made of insulating material, which has the shape of a ring trough with a jacket 11 coaxial with the axis 12, a bottom 13 and a likewise coaxial sleeve 14, which is rectangular in cross section to the axis 12 and one Through opening 15 forms. This is conical with the larger opening 16. On the sleeve 14, a winding support 18 with two windings 17 (primary and secondary winding) is attached.

Ein aus zwei Hälften 20 zusammengesetzter Kern 19 aus lamellierten Eisenblechen hat einen ebenfalls rechteckigen Querschnitt und ist in der Durchgangsöffnung 15 der Hülse 14 eingeschoben. Ein aus Weich­gummi hergestellter Keil 21 (Gummiteil) hat einen rechteckigen Quer­schnitt mit einer zur Achse 12 parallelen Anzugsfläche, d. h. die Konizität bildende Fläche. Die Breite des Keiles 21 quer zur Zeich­nungsebene entspricht annähernd der Breite der Seitenfläche 22 des Eisenkernes 19. Bei der Montierung der Zündspule wird der Keil 21 auf die eine Seitenfläche 22 der einen Kernhälfte 20 gelegt und bei­de in die Hülse 14 eingeschoben. Danach wird die andere Kernhälft 20 bei angedrücktem Keil 21 in die Hülse 14 eingeschoben.A core 19 composed of laminated iron sheets, which is composed of two halves 20, also has a rectangular cross section and is inserted into the through opening 15 of the sleeve 14. A wedge 21 made of soft rubber (rubber part) has a rectangular cross section with a pulling surface parallel to the axis 12, that is to say the surface which forms the taper. The width of the wedge 21 transversely to the plane of the drawing corresponds approximately to the width of the side surface 22 of the iron core 19. When the ignition coil is mounted, the wedge 21 is placed on one side surface 22 of one core half 20 and both are pushed into the sleeve 14. The other core half 20 is then pushed into the sleeve 14 while the wedge 21 is pressed on.

Durch die Wirkung des Keiles 21 kommt es zur allseitigen Anlage des Kernes 19 an der Hülse 14 und mithin zu deren gegenseitigen Befesti­gung.The action of the wedge 21 causes the core 19 to come into contact with the sleeve 14 on all sides and consequently to their mutual fastening.

Figur 2 zeigt die Variante des Keiles 31 aus Weichgummi, dessen Querschnitt die Form eines Dreiecks hat. Dabei liegt die Grundfläche 32 des Keiles 31 auf der Seitenfläche 22 (Figur 1) des Kernes 19 auf, während die der Grundfläche 32 gegenüberliegende Kante 33 mit der Durchgangsöffnung 15 der Hülse 12 zusammenwirkt. Die Breite der Grundfläche 32 entspricht annähernd der Breite der Seitenfläche 22.Figure 2 shows the variant of the wedge 31 made of soft rubber, the cross section of which has the shape of a triangle. The base 32 of the wedge 31 lies on the side surface 22 (FIG. 1) of the core 19, while the edge 33 opposite the base 32 interacts with the through opening 15 of the sleeve 12. The width of the base surface 32 corresponds approximately to the width of the side surface 22.

Claims (6)

1. Zündspule, insbesondere Zündspule für Zündanlagen von Brennkraft­maschinen, mit einem Kern aus magnetisch leitfähigem Material und mit einem Gehäuse, das eine insbesondere eine Primärwicklung und eine Sekundärwicklung stützende Hülse aufweist, in welcher der Kern mittels eines elastischen Elementes befestigt ist, wobei das Element bezüglich der Achse der Zündspule radial wirkt, dadurch gekennzeich­net, daß das Teil (21) aus Gummi hergestellt ist.1. Ignition coil, in particular ignition coil for ignition systems of internal combustion engines, with a core made of magnetically conductive material and with a housing which has a sleeve supporting in particular a primary winding and a secondary winding, in which the core is fastened by means of an elastic element, the element with respect the axis of the ignition coil acts radially, characterized in that the part (21) is made of rubber. 2. Spule nach Anspruch 1, dessen Kern und die Hülse des Gehäuses einen viereckigen Querschnitt mit vier Seitenflächen aufweisen, da­durch gekennzeichnet, daß das Teil (21) zwischen der einen Seiten­fläche (22) des Kernes (19) und der benachbarten Seitenfläche der Hülse (14) angeordnet ist.2. Coil according to claim 1, whose core and the sleeve of the housing have a square cross section with four side surfaces, characterized in that the part (21) between the one side surface (22) of the core (19) and the adjacent side surface of the sleeve ( 14) is arranged. 3. Spule nach Anspruch 2, dadurch gekennzeichnet, daß das Teil ein Keil ist, dessen Anzugsfläche parallel zur Achse (12) der Zündspule ist.3. Coil according to claim 2, characterized in that the part is a wedge, the attraction surface is parallel to the axis (12) of the ignition coil. 4. Spule nach Anspruch 3, der Keil (21) einen quer zur Achse (12) rechteckigen Querschnitt hat.4. Coil according to claim 3, the wedge (21) has a cross section transverse to the axis (12). 5. Spule nach Anspruch 3, dadurch gekennzeichnet, daß der Keil (21) einen quer zur Achse (12) nicht rechteckförmigen, insbesondere drei­eckförmigen, Querschnitt hat.5. Coil according to claim 3, characterized in that the wedge (21) has a cross-section to the axis (12) not rectangular, in particular triangular, cross section. 6. Spule nach einem der vorgenannten Ansprüche, dadurch gekennzeich­net, daß der Keil (21) aus Weichgummi hergestellt ist und daß die Härte des Weichgummis annähernd 35 shore beträgt.6. Coil according to one of the preceding claims, characterized in that the wedge (21) is made of soft rubber and that the hardness of the soft rubber is approximately 35 shore.
EP87107380A 1986-06-25 1987-05-21 Ignition coil, particularly an ignition coil for the ignition devices of internal-combustion engines Withdrawn EP0250834A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3621232 1986-06-25
DE19863621232 DE3621232A1 (en) 1986-06-25 1986-06-25 IGNITION COIL, IN PARTICULAR IGNITION COIL FOR IGNITION SYSTEMS OF INTERNAL COMBUSTION ENGINES

Publications (1)

Publication Number Publication Date
EP0250834A1 true EP0250834A1 (en) 1988-01-07

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Family Applications (1)

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EP87107380A Withdrawn EP0250834A1 (en) 1986-06-25 1987-05-21 Ignition coil, particularly an ignition coil for the ignition devices of internal-combustion engines

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EP (1) EP0250834A1 (en)
AU (1) AU7312687A (en)
DE (1) DE3621232A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0524087A1 (en) * 1991-07-18 1993-01-20 Mecagis Mechanical damping device for a magnetic core in a casing

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2550501A (en) * 1949-12-31 1951-04-24 Gen Electric Gap bridging lamination for noise reduction in magnetic structures
US2784384A (en) * 1954-06-07 1957-03-05 Gen Electric Inductive device
DE1197975B (en) * 1963-01-29 1965-08-05 Licentia Gmbh Method for supporting the winding against the boltless, bandaged core
US3199177A (en) * 1955-05-24 1965-08-10 Magnetics Inc Method for encasing magnetic cores
DE1513908A1 (en) * 1965-01-19 1969-04-03 Licentia Gmbh Clamping element for clamping laminated iron cores of transformers and the like.
DE2546637A1 (en) * 1975-10-16 1977-04-21 Deutsche Telephonwerk Kabel Clamping wedge for securing core laminations - has middle line fold and its taper continuously increased from edge to middle line

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2550501A (en) * 1949-12-31 1951-04-24 Gen Electric Gap bridging lamination for noise reduction in magnetic structures
US2784384A (en) * 1954-06-07 1957-03-05 Gen Electric Inductive device
US3199177A (en) * 1955-05-24 1965-08-10 Magnetics Inc Method for encasing magnetic cores
DE1197975B (en) * 1963-01-29 1965-08-05 Licentia Gmbh Method for supporting the winding against the boltless, bandaged core
DE1513908A1 (en) * 1965-01-19 1969-04-03 Licentia Gmbh Clamping element for clamping laminated iron cores of transformers and the like.
DE2546637A1 (en) * 1975-10-16 1977-04-21 Deutsche Telephonwerk Kabel Clamping wedge for securing core laminations - has middle line fold and its taper continuously increased from edge to middle line

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0524087A1 (en) * 1991-07-18 1993-01-20 Mecagis Mechanical damping device for a magnetic core in a casing
FR2679377A1 (en) * 1991-07-18 1993-01-22 Mecagis DEVICE FOR THE MECHANICAL DAMPING OF A MAGNETIC CORE IN A HOUSING.

Also Published As

Publication number Publication date
DE3621232A1 (en) 1988-01-07
AU7312687A (en) 1988-01-07

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Inventor name: RAMIREZ, EDUARDO