EP0432026A1 - Niederspannungsverbinder für eine Zündspule, insbesondere für Brennkraftmaschine eines Kraftfahrzeuges - Google Patents

Niederspannungsverbinder für eine Zündspule, insbesondere für Brennkraftmaschine eines Kraftfahrzeuges Download PDF

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Publication number
EP0432026A1
EP0432026A1 EP90403425A EP90403425A EP0432026A1 EP 0432026 A1 EP0432026 A1 EP 0432026A1 EP 90403425 A EP90403425 A EP 90403425A EP 90403425 A EP90403425 A EP 90403425A EP 0432026 A1 EP0432026 A1 EP 0432026A1
Authority
EP
European Patent Office
Prior art keywords
primary
coil
ignition coil
bars
connector
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
EP90403425A
Other languages
English (en)
French (fr)
Other versions
EP0432026B1 (de
Inventor
Dominique Vialaneix
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.)
Sagem SA
Original Assignee
Sagem Allumage SA
Valeo Electronique SA
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 Sagem Allumage SA, Valeo Electronique SA filed Critical Sagem Allumage SA
Publication of EP0432026A1 publication Critical patent/EP0432026A1/de
Application granted granted Critical
Publication of EP0432026B1 publication Critical patent/EP0432026B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads

Definitions

  • the present invention relates to an ignition coil, in particular for an internal combustion engine of a motor vehicle.
  • the secondary of such a coil produces a very high voltage making it possible to generate an electric arc at the electrodes of the spark plugs, thus igniting the oxidizing mixture contained in the cylinders of the engine.
  • a single coil controls all the spark plugs via, for example, a mechanical distributor, generally of the rotating finger type.
  • the present invention relates more particularly to such a coil, known as a single-cylinder which comprises in a manner known per se, a closed circuit magnetic assembly comprising a central magnetic core around which are coaxially arranged two coils of plastic material carrying the primary and secondary windings, this assembly being integrated in a molded plastic housing. Synthetic resin, cast inside the case and electrically insulates the different elements of the ignition coil from each other.
  • Low-voltage connection devices are generally located on the upper part of the coil assembly and are made up of connection bars, one end of which is connected to the primary winding by soldering or any other means and whose the other end is housed in the body of a connector.
  • This connector is fixed on the body of the coil and ensures the low-voltage electrical connection with the outside of the latter.
  • this connector Depending on the vehicle on which the ignition coil is installed, it is necessary for this connector to have different angular orientations, or even different shapes, in particular to satisfy the space requirements specific to the vehicle. It is therefore necessary for the manufacturer of the ignition coil to deliver his product with different connectors.
  • connection bars and the ends, in particular of the primary winding, must be made before the magnetic assembly of the housing is introduced.
  • an ignition coil in particular for an internal combustion engine of a motor vehicle, comprising integrated into a housing a magnetic assembly consisting in particular of a magnetic core housed in a primary coil, a coaxial secondary coil. at the primary coil, primary and secondary windings, a magnetic flux return circuit, low-voltage supply means comprising in particular a connector in which bars are overmolded, said bars having ends external to the connector, means for holding the magnetic assembly of the connector and bars, characterized in that the holding means consist of the ends of the bars cooperating with housings formed in a flange of the secondary winding.
  • the ends of the bars are introduced into pliers respectively from primary inserts and from a secondary insert.
  • the desired low-voltage electrical connections can be made automatically, before insertion of the magnetic assembly into the housing, in particular with the primary winding.
  • a single-cylinder ignition coil according to the invention comprises a housing 1 made of insulating material.
  • the bottom of the housing 1 is extended in its center by a barrel 2 made of material.
  • This barrel 2, of generally cylindrical shape comprises a housing in which the high-voltage output member 3 is fixed.
  • a magnetic flux return circuit 4 consisting of cut and laminated magnetic sheets is incorporated by molding in the housing 1 and constitutes somehow the metal frame of it.
  • the closed magnetic circuit of such a coil also includes a primary winding 5 wound around a primary winding 6.
  • the secondary assembly S is held in lift on and around the primary assembly P.
  • the primary P and secondary S assemblies being assembled one inside the other, the magnetic circuit thus constituted is intended to be introduced into a housing 10 of the housing 1.
  • the low-voltage connections Before its introduction into the housing 10 of the housing 1, on this magnetic assembly, on the one hand, the low-voltage connections, and, on the other hand, the high-voltage connection means.
  • the high-voltage connection means provide the connection between the high-voltage end of the secondary winding 9 and the high-voltage output member 3 which receives an intermediate sleeve ensuring the connection with the spark plug (not shown). ) to which the coil is associated.
  • These means consist of a bracket 11, a high-voltage connection plate 12 mechanically and therefore electrically connected to a high-voltage insert 13, on which the high-voltage end of the secondary winding 9 is fixed.
  • the magnetic assembly being introduced into the housing, the stud 3 is fixed by screwing in the high-voltage connection plate 12.
  • FIGS. 3 and 4 showing the secondary coil 8 of generally tubular shape, produced by molding of plastic material and comprising at each of its ends a flange 31, 32.
  • a plurality of discs 33 compartmentalize said coil 8.
  • Wire wound on the reel 8 constitutes the secondary winding 9.
  • the discs 33 make it possible to hold the wires constituting the winding 9 over a large thickness.
  • the secondary coil 8 comprises a tubular housing 34 intended to receive the primary assembly P.
  • three housings 35, 36, 37 are formed in the flange 32, the cross section of which is in the general shape of a T and opening onto the external face of the flange 32 in the form of slots 38, 39, 40.
  • the housing 37 is extended laterally by a slot 41, the bottom of which is in the form of a flared V with a horizontal part 42 and two inclined faces 43, 44.
  • Figures 5 to 7 show an insert 51 for low-voltage connection of the secondary winding which will be referred to below as secondary insert.
  • the secondary insert 51 made of conductive metal by cutting and bending has a vertical wall 52, the lower edge of which has a horizontal part 53 and two inclined lateral parts 54 and 55. This vertical wall 52 extends laterally on the side of the inclined part 55 by an inclined branch 56.
  • the vertical wall 52 also includes a tongue 57 precut and arched.
  • the vertical wall 52 On the side of the inclined part 54, the vertical wall 52 is extended by a wall 58 also vertical, the end of which is cut and folded so as to form a clamp 59 in the general shape of a U.
  • the secondary insert 51 is intended to be forcibly inserted into the slot 41 of the secondary reel 8. Its precise positioning is ensured by cooperation of the inclined parts 54, 55 of the secondary insert 51 with the inclined faces 43, 44 respectively of the bottom of slot 41.
  • FIGS. 8 and 9 illustrate the primary coil 6 of generally tubular shape, produced by molding of plastic material and comprising at each of its ends a flange 61, 62 and a housing 63, of rectangular shape, intended to receive the central magnetic core 7.
  • the upper part of the flange 61 is extended externally by a parallelepipedic boss 64, in which are formed two slots 65, 66, L-shaped, opening from said boss 64 laterally and frontally.
  • flange 61 In the flange 61 are arranged two notches 67, 68 intended for the passage of the ends of the primary winding 5.
  • Figures 10 to 12 show one of the primary inserts 71 made of a conductive material by cutting and bending.
  • the primary insert 71 comprises a first branch 72 at the end of which a clamp 73 in the form of a U is formed.
  • This branch 71 is connected to a second branch 74 by three successive folds at right angles.
  • the end of this second branch 74 has a clamp 75 also in the shape of a U.
  • Such an ignition coil is supplied with low voltage from an external connector 14 ( Figures 1 and 2) in which are overmolded strips 15, 16, 17, the ends of which 18, 19, 20 must be connected respectively at the ends of the primary winding 5 and at the low-voltage end of the secondary winding 9.
  • the ends 18, 19, 20 of the bars 15, 16, 17 external to the connector 14 comprise an L-shaped part, the horizontal branch of which is of smaller width, said width corresponding to the slots 38, 39, 40 of the housings 35, 36, 37 of the secondary spool 8.
  • the means for holding the connector assembly 14, bars 15, 16, 17 are formed by cooperation of the ends 18, 19, 20 of said bars with the housings 35, 36, 37 of the secondary coil 8.
  • the ends 18, 19, 20 are rigid enough to support the connector 14 and the depth of the housings 35, 36, 37 is large enough to strengthen their rigidity.
  • the connector assembly 14, bars 15, 16, 17 being thus positioned on the magnetic assembly, it suffices to make the desired electrical connections.
  • the primary coil 6 is equipped with primary inserts 71 and 71 ′.
  • the primary insert 71 ′ being symmetrical and of identical design to the insert 71, has not been described in detail.
  • the inserts 71, 71 ′ are forced into the L-shaped slots 65 and 66 of the primary winding 6.
  • the ends 69, 70 of the primary winding 5 are bent at right angles and are positioned in the clamps 73, 73 respectively ′ Of the primary inserts 71, 71 ′ where they are crimped.
  • the secondary insert 51 is forced into the slot 41 of the secondary winding 8.
  • the secondary winding 9 being produced, the low-voltage end of said winding 9 is fixed by winding and welding, to the inclined branch 56 of the secondary insert 51.
  • the primary P and secondary S assemblies thus formed are assembled, then the low-voltage connector 14 fitted with its bars 15, 16, 17 is positioned by introducing the ends 18, 19, 20 into the housings 38, 39, 40 secondary coil 8.
  • the arrangement of the assembly is such that the ends 18, 19, 20 of the bars 15, 16, 17 are received respectively in the clamps 75, 75 ′ and 59 where they are crimped.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP90403425A 1989-12-06 1990-12-03 Niederspannungsverbinder für eine Zündspule, insbesondere für Brennkraftmaschine eines Kraftfahrzeuges Expired - Lifetime EP0432026B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8916102A FR2655474B1 (fr) 1989-12-06 1989-12-06 Connectique basse-tension d'une bobine d'allumage, en particulier pour moteur a combustion interne de vehicule automobile.
FR8916102 1989-12-06

Publications (2)

Publication Number Publication Date
EP0432026A1 true EP0432026A1 (de) 1991-06-12
EP0432026B1 EP0432026B1 (de) 1994-04-06

Family

ID=9388199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90403425A Expired - Lifetime EP0432026B1 (de) 1989-12-06 1990-12-03 Niederspannungsverbinder für eine Zündspule, insbesondere für Brennkraftmaschine eines Kraftfahrzeuges

Country Status (6)

Country Link
US (1) US5053737A (de)
EP (1) EP0432026B1 (de)
JP (1) JPH04708A (de)
DE (1) DE69007949T2 (de)
ES (1) ES2055378T3 (de)
FR (1) FR2655474B1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4720646A (en) * 1985-12-03 1988-01-19 Mitsubishi Denki Kabushiki Kaisha Connection terminal assembly for stator coil
EP0255409A1 (de) * 1986-07-23 1988-02-03 Valeo Electronique Elektrische Verbindungen des Sekundärkreises einer Zündspule
EP0307703A1 (de) * 1987-09-11 1989-03-22 Saia Ag Spulenkörper

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3189857A (en) * 1962-12-31 1965-06-15 Gen Electric Transformer bobbin
US3979707A (en) * 1975-02-07 1976-09-07 Ault Incorporated Power-pack assembly
US4519015A (en) * 1983-08-23 1985-05-21 Lin Jiing S Plug-in type of power supply
JPS63142622A (ja) * 1986-12-04 1988-06-15 Nippon Denso Co Ltd 内燃機関の点火コイル
US4766406A (en) * 1987-04-16 1988-08-23 Universal Manufacturing Corporation Fluorescent ballast assembly
FR2646553B1 (fr) * 1989-04-28 1991-08-23 Marchal Equip Auto Connecteur basse-tension pour bobine d'allumage, en particulier pour moteur a combustion interne de vehicule automobile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4720646A (en) * 1985-12-03 1988-01-19 Mitsubishi Denki Kabushiki Kaisha Connection terminal assembly for stator coil
EP0255409A1 (de) * 1986-07-23 1988-02-03 Valeo Electronique Elektrische Verbindungen des Sekundärkreises einer Zündspule
EP0307703A1 (de) * 1987-09-11 1989-03-22 Saia Ag Spulenkörper

Also Published As

Publication number Publication date
EP0432026B1 (de) 1994-04-06
FR2655474B1 (fr) 1992-04-24
US5053737A (en) 1991-10-01
JPH04708A (ja) 1992-01-06
FR2655474A1 (fr) 1991-06-07
ES2055378T3 (es) 1994-08-16
DE69007949T2 (de) 1994-11-17
DE69007949D1 (de) 1994-05-11

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