WO1983002033A1 - Ignition coil for internal combustion engines - Google Patents

Ignition coil for internal combustion engines Download PDF

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Publication number
WO1983002033A1
WO1983002033A1 PCT/FR1982/000178 FR8200178W WO8302033A1 WO 1983002033 A1 WO1983002033 A1 WO 1983002033A1 FR 8200178 W FR8200178 W FR 8200178W WO 8302033 A1 WO8302033 A1 WO 8302033A1
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WO
WIPO (PCT)
Prior art keywords
electrical connection
slot
ignition coil
secondary winding
connection element
Prior art date
Application number
PCT/FR1982/000178
Other languages
French (fr)
Inventor
Et Cie Ducellier
Guy Camus
Robert Mark
Original Assignee
Ducellier & Cie
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 Ducellier & Cie filed Critical Ducellier & Cie
Publication of WO1983002033A1 publication Critical patent/WO1983002033A1/en

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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.

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

Abstract

Coil comprising a primary winding, a secondary winding having a metal plait (7) connected to one of its ends, an electric connection element (8) provided a flat plug (8a) for electric connection and with a double self-stripping slot (8b) providing for the electric contact with the end (2a) of the primary winding (2), characterized in that the element (8) has a slot (8c) opening into a circular hole (8d) wherein the metal plait (7) is inserted and maintained in electric contact with the element (8) by means of a cylindro-conical peg (10) forced into the hole (8d).

Description

BOBINE D'ALLUMAGE POUR MOTEURS A COMBUSTION INTERNE L'invention concerne une bobine d'allumage pour moteurs à combustion interne, notamment de véhicules automobiles, bobine comportant en particulier un enroulement primaire, un enroulement secondaire, en fils conducteurs isolés par émaillage, une tresse métallique, non isolée, connectée électriquement à l'une des extrémités, dénudée, de l'enroulement secondaire et au moins un élément de liaison électrique muni, au moins, d'une fiche plate de raccordement électrique à la batterie du véhicule et d'une fente auto-dénudante de manière à réaliser un contact électrique av ec une des extrémités de l'enroulement primaire. IGNITION COIL FOR INTERNAL COMBUSTION ENGINES 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.
Dans ces bobines d'allumage, la connexion des enroulements primair et secondaire s'effectue, généralement, par soudure à l'étain sur l'élément de liaison électrique qui comporte alors un trou prévu à cet effet. Toutefois les vibrations importantes auxquelles sont soumises les bobines d'allumage lorsqu'elles sont montées sur les véhicules automobiles provoquent souvent des ruptures des fils conducteurs constituants les enroulements, ces ruptures ayant lieu dans la zone de contrainte maximum pour les fils conducteurs, c'est à dire à proximité immédiate de la soudure.In these ignition coils, 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. However, 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.
Pour l'enroulement primaire, on peut remédier à cet inconvénient en employant, pour la liaison électrique, le procédé décrit, par exemple dans le brevet US : 3 012 219;procédé dans lequel une fente auto-dénudante est prévue sur un élément de liaison élec trique, laquelle fente, lorsque le fil conducteur isolé y est introduit, par pression, pénétre la couche d'émail isolant, assurant ainsi la liaison électrique.For the primary winding, this drawback can be remedied by using, for the electrical connection, the method described, for example in US patent: 3,012,219; method in which a self-stripping slot is provided on a connecting element electric, which slits, when the insulated conductive wire is introduced therein, by pressure, penetrates the insulating enamel layer, thus ensuring the electrical connection.
Un tel procédé ne peut être utilisé pour la connexion de l'enroulement secondaire en raison du faible diamètre, sept centièmes de millimètre environ, du fil utilisé pour la réalisation de cet enroulement.Such a method cannot be used for the connection of the secondary winding because of the small diameter, approximately seven hundredths of a millimeter, of the wire used for the production of this winding.
En conséquence, il est prévu une tresse plate métallique, non isolée, connectée à l'une des extrémités, dénudée, du fil constituant l'enroulement secondaire, laquelle tresse est ensuite soudée électriquement, par résistance, sur l'élément de liaison électrique La demanderesse a constaté qu'avec ce procédé de soudure, la pression, exercée par l'électrode de soudage, provoque une déformation de l'élément de liaison électrique, laquelle déformation provoque des rebuts importants et en conséquence un accroissement préjudiciable des coûts de fabrication.Consequently, there is provided a flat metal braid, not insulated, connected to one of the stripped ends of the wire constituting the secondary winding, which braid is then electrically welded, by resistance, to the electrical connection element La Applicant has found that with this welding process, the pressure exerted by the welding electrode causes deformation of the electrical connection element, which deformation causes significant scrap and consequently a detrimental increase in manufacturing costs.
La présente invention a pour but de remédier à ces inconvénients et concerne à cet effet/une bobine d'allumage caractérisée en ce que l'élément de liaison électrique comporte une ouverture se présentant sous la forme d'une fente débouchant dans un trou circulaire dans lequel, au moyen de la fente, la tresse métallique de l'enroulement secondaire estintroduite, laquelle tresse métallique est maintenue en contact électrique avec l'élément de liaison électrique par une cheville cylindroconique pénétrant à force dans ledit trou.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.
L'avantage obtenu, par l'invention, consiste en ce que la rupture du fil secondaire due à l'emploi de la soudure à l'étain ou la déformation de l'élément de liaison électrique sous l'effet de la pression exercée par l'électrode pour le soudage électrique, par résistance, de la tresse métallique sont supprimés. La description qui va suivre en regard des dessins annexés fera mieux comprendre comment l'invention peut être réalisée. La figure 1 est une vue de côté, en coupe partielle, d'une bobine d'allumage selon l'invention.The advantage obtained by the invention consists in that the breaking of the secondary wire due to the use of tin soldering or the deformation of the electrical connection element under the effect of the pressure exerted by the electrode for electrical resistance welding of the metal braid is eliminated. The description which follows with reference to the appended drawings will make it easier to understand how the invention can be implemented. Figure 1 is a side view, in partial section, of an ignition coil according to the invention.
La figure 2 est une vue agrandie et en perspective de l'élément de liaison électrique et de la cheville cylindroconique. De façon connue, la bobine d'allumage représentée en vue de côté, par la figure 1, comprend un circuit magnétique 1, constitué de tδles découpées en forme de E et de I, de manière à former un circuit fermé, lesquelles tôles sont empilées les unes sur les autres.Figure 2 is an enlarged perspective view of the electrical connection element and the cylindrical cone. In known manner, 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.
Un enroulement primaire 2 bobiné sur un support isolant 3, en matière moulée, et un enroulement secondaire 4, bobiné sur un support isolant 5 tel, par exemple, qu'un tube en carton, sont logés dans un boitier 6 en matière plastique moulée. Unetresse métallique 7, non isolée, est connectée à l'une des extrémités dénudée de l'enroulement secondaire 4. L'enroulement primaire est relié, par son extrémité 2a (voir figure 2) à un élément de liaison électrique 8, muni d'une fiche plate 8a, de raccordement électrique à la borne positive de la batterie (non représentée) pour l'alimentation de la bobine d'allumage. L'élément de liaison électrique 8, comporte, dans cet exemple de réalisation, une double fente auto-dénudante 8b. Cette fente auto-dénudante 8b introduite par pression, à l'aide d'un outillage approprié, dans les logements 3a prévus, à cet effet, dans le support isolant 3, repousse l'extrémité 2a du fil conducteur constituant l'enroulement primaire 2, jusqu'au fond d'une fente 3b, après quoi, sous l'effet de la pression exercée, la double fente 8b pénètre la couche d'émail isolant du fil conduc teur, assurant ainsi le contact électrique entre l'extrémité 2a de l'enroulement primaire 2 et l'élément de liaison électrique 8. L'autre extrémité (non représentée) de l'enroulement primaire est reliée par le même procédé à un autre élément de liaison électrique (non représenté) connecté à un rupteur mécanique ou électronique (non représenté). Une borne de sortie haute tension 9 assure la connexion, par l'intermédiaire d'un cable, entre un distributeur d'allumage (non représenté) et une des extrémités de l'enroulement secondaire 4. Conformément à l'invention, (voir figure 2) l'élément de liaison électrique 8 comporte une ouverture se présentant sousld forme d'une fente 8c, débouchant dans un trou circulaire 8d, dans lequel au moyen de la fente 8c, est introduite la tresse métallique 7 connectée à l'autre extrémité de l'enroulement secondaire 4. Cette tresse métallique 7 est maintenue en contact électrique avec l'élément de liaison 8 par une cheville cylindroconique 10 pénétrant à force dans le trou 8d.A primary winding 2 wound on an insulating support 3, made of molded material, and a secondary winding 4, wound on an insulating support 5 such as, for example, a cardboard tube, are housed in a case 6 made of molded plastic. A metallic braid 7, not insulated, is connected to one of the stripped ends of the secondary winding 4. 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. According to the invention, (see figure 2) 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.
Dans cet exemple de réalisation, la cheville cylindroconique 10, vient de matière avec un élément isolant 11 (voir figure 1) tel, par exemple que la partie femelle d'un connecteur qui comportant l'élément de liaison électrique 8 assure l'alimentation de la bobine d'allumage à partir de la batterie du véhicule.In this exemplary embodiment, 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.
Les enroulements primaire 2 et secondaire 4 ayant été ainsi raccordés a leurs éléments respectifs de liaison électrique, le boitier 6 contenant ces enroulements est disposé, de façon connue, autour de la branche centrale des tôles découpées en forme de E, après quoi, le boitier 6 est rempli d'une matière isolante coulée 12. The primary 2 and secondary 4 windings having been thus connected to their respective electrical connection elements, 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.

Claims

REVENDICATION:CLAIM:
Bobine d'allumage pour moteurs à combustion interne, bobine comportant en particulier un enroulement primaire (2), un enroulement secondaire 4, en fils isolés par émaillage, une tresse métallique (7), non isolée, connectée a l'une des extrémités dénudée, de l'enroulement secondaire et au moins un élément de liaison électrique (8) muni au moins d ' une fiche plate (8a) de raccordement électrique et d ' une fente double (8b) auto-dénudante de manière à réaliser un contact électrique avec l'extrémité (2a) de l'enrou lement primaire, caractérisée en ce que l'élément de liaison élec trique (8) comporte une ouverture se présentant sous la forme d'une fente (8c) débouchant dans un trou circulaire (8d) dans lequel, au moyen de la fente (8c), la tresse métallique (7) de l'enroulement secondaire (4) est introduite, laquelle tresse métallique (7) est maintenue en contact électrique avec l'élément de liaison électrique (8) par une cheville cylindroconique (10) pénétrant à force dans le trou (8d). Ignition coil for internal combustion engines, coil comprising in particular a primary winding (2), a secondary winding 4, made of wires insulated by enameling, a metal braid (7), not insulated, connected to one of the stripped ends , of the secondary winding and at least one electrical connection element (8) provided with at least one flat plug (8a) for electrical connection and with a self-stripping double slot (8b) so as to make an electrical contact with the end (2a) of the primary winding, characterized in that the electrical connecting 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) of the secondary winding (4) is introduced, which metal braid (7) is maintained in electrical contact with the electrical connection element (8 ) by a cylindrical cone (10) pe forced into the hole (8d).
PCT/FR1982/000178 1981-11-26 1982-11-04 Ignition coil for internal combustion engines WO1983002033A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR81/22125811126 1981-11-26
FR8122125A FR2517105A1 (en) 1981-11-26 1981-11-26 IGNITION COIL FOR INTERNAL COMBUSTION ENGINES

Publications (1)

Publication Number Publication Date
WO1983002033A1 true WO1983002033A1 (en) 1983-06-09

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PCT/FR1982/000178 WO1983002033A1 (en) 1981-11-26 1982-11-04 Ignition coil for internal combustion engines

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EP (1) EP0096038A1 (en)
AR (1) AR228329A1 (en)
ES (1) ES268639Y (en)
FR (1) FR2517105A1 (en)
IT (1) IT1148492B (en)
PT (1) PT75802B (en)
WO (1) WO1983002033A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10233251B4 (en) * 2001-09-03 2006-08-17 Sanden Corp., Isesaki Yoke for an electromagnetic clutch

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29705443U1 (en) * 1997-03-26 1998-07-23 Bosch Gmbh Robert ignition coil
DE10014738A1 (en) * 2000-03-24 2001-10-11 Bosch Gmbh Robert Electrical coil, especially for solenoid valve, has holder with different depth crossing slots; wire is placed in shallower slot narrower at bottom than wire diameter

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR743035A (en) * 1933-03-22
DE1564774A1 (en) * 1966-12-09 1970-05-14 Siemens Ag Coil body provided with connection lugs
FR2023849A1 (en) * 1968-11-22 1970-08-21 Lucas Industries Ltd
DE2023170A1 (en) * 1970-05-12 1971-12-02 Krone Gmbh Switchable electrical terminal connection
DE2143404A1 (en) * 1971-08-30 1973-03-08 Siemens Ag CONNECTING ELEMENT FOR STRIPPING-FREE CONTACT OF SEVERAL ELECTRICAL CONDUCTORS
FR2253258A1 (en) * 1973-11-29 1975-06-27 Schwabe Hermann Ballast inductor for gas discharge lamps - has entirely separate two-part insulating housings for each winding head in one piece with head insulator
FR2295585A1 (en) * 1974-12-19 1976-07-16 Cibie Projecteurs Rapid connector for supply cable to fitting on support - has clamping element with hole for passage of stripped end subjected to specific force (NL220676)
FR2345828A1 (en) * 1976-03-24 1977-10-21 Amp Inc PLIERS FOR CONNECTING AN INSULATED WIRE ON A PIN
US4118103A (en) * 1977-09-15 1978-10-03 Amp Incorporated Double-ended connecting device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR743035A (en) * 1933-03-22
DE1564774A1 (en) * 1966-12-09 1970-05-14 Siemens Ag Coil body provided with connection lugs
FR2023849A1 (en) * 1968-11-22 1970-08-21 Lucas Industries Ltd
DE2023170A1 (en) * 1970-05-12 1971-12-02 Krone Gmbh Switchable electrical terminal connection
DE2143404A1 (en) * 1971-08-30 1973-03-08 Siemens Ag CONNECTING ELEMENT FOR STRIPPING-FREE CONTACT OF SEVERAL ELECTRICAL CONDUCTORS
FR2253258A1 (en) * 1973-11-29 1975-06-27 Schwabe Hermann Ballast inductor for gas discharge lamps - has entirely separate two-part insulating housings for each winding head in one piece with head insulator
FR2295585A1 (en) * 1974-12-19 1976-07-16 Cibie Projecteurs Rapid connector for supply cable to fitting on support - has clamping element with hole for passage of stripped end subjected to specific force (NL220676)
FR2345828A1 (en) * 1976-03-24 1977-10-21 Amp Inc PLIERS FOR CONNECTING AN INSULATED WIRE ON A PIN
US4118103A (en) * 1977-09-15 1978-10-03 Amp Incorporated Double-ended connecting device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Insulation Circuits, Vol. 22, No. 8, July 1976 (Lake Publishing Corp. Libertyville) E. REYNOLDS "Magnet Wire Interconnect System Enhances Automation of Coil Termination", pages 27-29 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10233251B4 (en) * 2001-09-03 2006-08-17 Sanden Corp., Isesaki Yoke for an electromagnetic clutch

Also Published As

Publication number Publication date
PT75802A (en) 1982-12-01
IT8249561A0 (en) 1982-11-24
EP0096038A1 (en) 1983-12-21
ES268639Y (en) 1983-12-01
PT75802B (en) 1985-01-28
ES268639U (en) 1983-05-16
IT1148492B (en) 1986-12-03
FR2517105B1 (en) 1984-01-27
AR228329A1 (en) 1983-02-15
FR2517105A1 (en) 1983-05-27

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