Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F5/00—Coils
  • H01F5/04—Arrangements of electric connections to coils, e.g. leads

Definitions

• the invention relates to an ignition coil for internal combustion engines, in particular of motor vehicles, coil comprising in particular a primary winding, a secondary winding, in conductive wires insulated by enameling, a braid metallic, not insulated, electrically connected to one of the stripped ends of the secondary winding and at least one electrical connection element provided, at least, with a flat plug for electrical connection to the vehicle battery and a self-stripping slot so as to make an electrical contact with one of the ends of the primary winding.
• the connection of the primary and secondary windings is generally carried out by tin soldering on the electrical connection element which then has a hole provided for this purpose.
• the significant vibrations to which the ignition coils are subjected when they are mounted on motor vehicles often cause breaks in the conductive wires constituting the windings, these ruptures taking place in the zone of maximum stress for the conductive wires, it is to say in the immediate vicinity of the weld.
• the object of the present invention is to remedy these drawbacks and to this end relates to an ignition coil characterized in that the electrical connection element comprises an opening in the form of a slot opening into a circular hole in which, by means of the slot, the metallic braid of the secondary winding is introduced, which metallic braid is maintained in electrical contact with the electrical connection element by a cylindrical-conical pin penetrating by force into said hole.
• Figure 1 is a side view, in partial section, of an ignition coil according to the invention.
• FIG. 1 is an enlarged perspective view of the electrical connection element and the cylindrical cone.
• the ignition coil shown in side view, in FIG. 1 comprises a magnetic circuit 1, made up of sheets cut out in the shape of E and I, so as to form a closed circuit, which sheets are stacked on top of each other.
• the primary winding is connected, by its end 2a (see FIG. 2) to an electrical connection element 8, provided with a flat plug 8a, for electrical connection to the positive terminal of the battery (not shown) for supplying the ignition coil.
• the electrical connection element 8 comprises, in this embodiment, a double self-stripping slot 8b.
• This self-stripping slot 8b introduced by pressure, using an appropriate tool, into the housings 3a provided, for this purpose, in the insulating support 3, pushes the end 2a of the conductive wire constituting the primary winding 2 , to the bottom of a slit 3b, after which, under the effect of the pressure exerted, the double slit 8b penetrates the insulating enamel layer of the conductive wire, thus ensuring the electrical contact between the end 2a of the primary winding 2 and the electrical connection element 8.
• the other end (not shown) of the primary winding is connected by the same process to another electrical connection element (not shown) connected to a mechanical breaker or electronic (not shown).
• a high voltage output terminal 9 provides the connection, via a cable, between an ignition distributor (not shown) and one of the ends of the secondary winding 4.
• the electrical connection element 8 has an opening in the form of a slot 8c, opening into a circular hole 8d, into which by means of the slot 8c, the metal braid 7 is connected, connected to the other end of the secondary winding 4. This metal braid 7 is maintained in electrical contact with the connecting element 8 by a cylindrical-cone dowel 10 forcing into the hole 8d.
• the cylindrical-cone dowel 10 comes integrally with an insulating element 11 (see FIG. 1) such, for example, that the female part of a connector which comprises the electrical connection element 8 ensures the supply of the ignition coil from the vehicle battery.
• the box 6 containing these windings is arranged, in a known manner, around the central branch of the sheets cut into an E shape, after which the box 6 is filled with an insulating casting material 12.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=9264381

Family Applications (1)

Country Status (7)

Families Citing this family (3)

Family Cites Families (9)

• 1981
  • 1981-11-26 FR FR8122125A patent/FR2517105A1/fr active Granted
• 1982
  • 1982-11-04 WO PCT/FR1982/000178 patent/WO1983002033A1/en unknown
  • 1982-11-04 EP EP82903245A patent/EP0096038A1/fr not_active Withdrawn
  • 1982-11-05 PT PT75802A patent/PT75802B/pt unknown
  • 1982-11-22 ES ES1982268639U patent/ES268639Y/es not_active Expired
  • 1982-11-24 IT IT49561/82A patent/IT1148492B/it active
  • 1982-11-25 AR AR291402A patent/AR228329A1/es active

Non-Patent Citations (1)

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