EP0418136A1 - High voltage connection for an ignition coil, particularly for an internal combustion engine of an automotive vehicle - Google Patents

High voltage connection for an ignition coil, particularly for an internal combustion engine of an automotive vehicle Download PDF

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Publication number
EP0418136A1
EP0418136A1 EP90402485A EP90402485A EP0418136A1 EP 0418136 A1 EP0418136 A1 EP 0418136A1 EP 90402485 A EP90402485 A EP 90402485A EP 90402485 A EP90402485 A EP 90402485A EP 0418136 A1 EP0418136 A1 EP 0418136A1
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EP
European Patent Office
Prior art keywords
voltage
ignition coil
housing
guide
bracket
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
EP90402485A
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German (de)
French (fr)
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EP0418136B1 (en
Inventor
Eric Badaud
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
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Publication of EP0418136A1 publication Critical patent/EP0418136A1/en
Application granted granted Critical
Publication of EP0418136B1 publication Critical patent/EP0418136B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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 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 block.
  • 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 so-called single-cylinder coil which comprises a closed circuit magnetic assembly, comprising a central magnetic core around which are coaxially arranged two plastic coils carrying the primary and secondary windings, this assembly being integrated in a molded plastic housing. Synthetic resin, poured inside the case, secures and electrically insulates between them the different elements constituting the ignition coil.
  • One of the problems to be solved on an ignition coil of this type is the realization of the high-voltage connection which allows the connection between the end of the secondary winding and the corresponding spark plug and in particular the output member. high voltage which is in direct contact with the spark plug with which the coil is associated.
  • This outlet member usually consists of a carbon maintained in contact with the end of the spark plug by the action of a spring.
  • Such charcoal is inevitably subject to wear and embrittlement due in particular to the high temperatures to which it is subjected.
  • 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 secondary coil coaxial with the primary coil, primary and secondary windings, a magnetic flux return circuit constituting a metal frame, a high-voltage connection assembly comprising in particular an insert fixed in the secondary coil, a high-voltage bracket, a high-voltage guide in which the high-voltage output member is housed, characterized in that this member consists of a spring.
  • the fixing of the various elements constituting the high-voltage connection and in particular the output member is ensured by the resin which is poured inside the case.
  • FIGS. 1 to 3 represent a high-voltage bracket 1 molded from insulating plastic material such as P.B.T.
  • This bracket 1 consists of a barrel 2 of generally cylindrical shape inside which a cylindrical housing 3 opening at one end of the barrel by an opening 4 whose diameter is smaller to that of the housing 3, thus providing inside the said housing 3 a shoulder 5.
  • the barrel 2 comprises a collar 6 made of material and projecting with respect to the external surface of the barrel 2.
  • the end of the barrel 2, opposite the end comprising the opening 4, is connected to a bar 7 by means of two sails 8 and 9 reinforced by ribs, respectively 10 and 11.
  • the bar 7 has two pins 12 and 13.
  • the wall of the barrel 2 opposite the bar 7 has an outlet 14 whose shape is shown on an enlarged scale in FIG. 3.
  • This outlet 14 comprises from the face 15 a conical flare 16 formed by the walls 16,17, a first slot formed by the walls 18 and 19 and a second slot formed by the walls 20 and 21, this second slot being wider than the first.
  • FIGS. 4 to 6 represent a high-voltage guide 25 produced from a plate of conductive material such as for example brass by cutting and stamping.
  • This high-voltage guide 25 is in the general form of a tube 26, the wall of which is extended at one of its ends by a horizontal tongue 27 comprising a vertical tab 28 whose end 29 is of smaller width.
  • Figures 7 to 9 show a high-voltage insert 30, made of conductive metal such as brass.
  • This insert 30 comprises a base 31 on one of the faces of which is formed a boss 32 in the center of which a slot 33 is arranged.
  • the base 31, the boss 32 and the slot 33 are of generally rectangular shape.
  • the base 31 is extended, on the one hand, by a lug 34, the end 35 of which is chamfered and has a generally trapezoidal section, on the other hand, by a tongue 36, the end 3 of which is bent at a right angle and is located on the opposite face of the base 31 relative to the tab 34.
  • the high-voltage bracket 1, the high-voltage guide 25, the insert 30 form part of an assembly constituting the high-voltage connection of the single-cylinder ignition coil according to the invention.
  • FIGS 10 and 11 illustrate such a coil consisting in particular of a housing 50 molded in plastic and a connector 51 allowing the low-voltage supply of the coil.
  • the magnetic circuit is closed and has a primary winding 52, wound around a reel 53.
  • a magnetic core 54 of rectangular section and generally composed of cut and laminated magnetic sheets is housed inside the reel 53.
  • a secondary winding 55 around which a secondary winding 56 is wound.
  • the secondary spool 55 is held in lift on and around the primary spool 53.
  • the high-voltage insert 30, described above, is introduced through the end 35 of its tab 34 into a slot provided for this purpose in the secondary coil 55.
  • the end of the secondary winding 56 is welded.
  • the assembly comprising in particular the primary 53 and secondary 55 coils thus formed is introduced into the housing 57 of the housing 50.
  • a magnetic flux return circuit 59 the general U shape of which can be seen, consisting of cut and laminated magnetic sheets, is incorporated by molding in the housing 50.
  • the magnetic flux return circuit 59 constitutes the metal frame of the housing 50 and the base fixing the entire coil to the cylinder head of the engine.
  • the high-voltage connection assembly is produced.
  • this high-voltage connection assembly consists of a spring 61 which is introduced into the high-voltage guide 25 until it comes into abutment against its tongue 27 (FIG. 4).
  • This spring 61 coming into direct contact with the spark plug associated with the coil therefore ensures the transmission of the high-voltage, and constitutes the high-voltage output member.
  • the high-voltage guide 25 fitted with the spring 61 is inserted into the housing 3 of the high-voltage bracket 1 and is fixed therein by snap-fastening the tab 27 of the guide 25 into the slot 20, 21 (FIGS. 2 and 3) ) of the outlet 14 of the bracket 1.
  • This high-voltage connection assembly thus produced is positioned in the housing on the secondary winding 55 already installed.
  • the high-voltage assembly is thus positioned in the housing 57 of the housing 50 synthetic resin is poured which fills it up to a level N close to that of the face 62 of the housing 50.
  • this level N is always greater than the level N ′ corresponding to the end of the spring 61 in the high-voltage guide 25.
  • the hardening of the resin immobilizes all the constituents inside the housing 50 and in particular the spring 61.
  • a high-voltage connection has thus been produced in particular with the spring 61, presenting numerous advantages: no more wearing part, resistance to vibrations, easy fixing.

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

Abstract

An ignition coil includes a plastic moulded casing (50) and a connector (51) for low voltage supply. Inside the casing a closed magnetic circuit is provided. It includes a primary winding (52) on a magnetic core (53,54) and a coaxial secondary winding (55). A slot allows insertion of the high voltage connector (30). The high voltage connector includes a plate with a central mould of rectangular shape. A slot is present in the mould centre. The plate presents a lateral tail and a blade that has its extremity bent at a right angle.

Description

La présente invention concerne une bobine d'allumage, en particulier pour moteur à combustion interne de véhicule automobile.The present invention relates to an ignition coil, in particular for an internal combustion engine of a motor vehicle.

De manière connue en soi, le secondaire d'une telle bobine produit une tension très élevée permettant d'engendrer un arc électrique aux électrodes des bougies d'allumage, enflammant ainsi le mélange comburant contenu dans les cylindres du bloc moteur.In a manner known per se, 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 block.

Habituellement, une seule bobine commande l'ensemble des bougies d'allumage par l'intermédiaire, par exemple, d'un distributeur mécanique, généralement du type à doigt tournant.Usually, a single coil controls all the spark plugs via, for example, a mechanical distributor, generally of the rotating finger type.

Une telle installation présente l'inconvénient de nécessiter un faisceau de câbles haute-tension permettant de relier d'une part, le secondaire de la bobine d'allumage au distributeur, d'autre part, le distributeur à chacune des bougies d'allumage.Such an installation has the disadvantage of requiring a bundle of high-voltage cables making it possible to connect on the one hand, the secondary of the ignition coil to the distributor, on the other hand, the distributor to each of the spark plugs.

En dehors du coût d'un tel faisceau, celui-ci est l'objet de fuites électriques générant des ondes radioélectriques parasites qui peuvent être acceptables avec l'utilisation d'un distributeur mécanique mais qui perturbent de manière importante l'ensemble du système d'allumage lorsque ce dernier est réalisé à l'aide de modules électroniques.Apart from the cost of such a beam, it is subject to electrical leaks generating parasitic radio waves which may be acceptable with the use of a mechanical distributor but which significantly disrupt the entire system d '' ignition when the latter is carried out using electronic modules.

De manière à supprimer ces inconvénients, on a déjà proposé d'associer individuellement à chaque bougie d'allumage une bobine.In order to eliminate these drawbacks, it has already been proposed to associate a coil with each spark plug.

La présente invention se rapporte plus particulièrement à une telle bobine dite monocylindre qui comporte un ensemble magnétique à circuit fermé, comprenant un noyau magnétique central autour duquel sont disposés coaxialement deux bobineaux en matière plastique portant les enroulements primaire et secondaire, cet ensemble étant intégré dans un boîtier surmoulé en matière plastique. De la résine synthétique, coulée à l'intérieur du boîtier solidarise et isole électriquement entre eux les différents éléments constituant la bobine d'allumage.The present invention relates more particularly to such a so-called single-cylinder coil which comprises a closed circuit magnetic assembly, comprising a central magnetic core around which are coaxially arranged two plastic coils carrying the primary and secondary windings, this assembly being integrated in a molded plastic housing. Synthetic resin, poured inside the case, secures and electrically insulates between them the different elements constituting the ignition coil.

L'un des problèmes à résoudre sur une bobine d'allumage de ce type est la réalisation de la connectique haute-tension qui permet la liaison entre l'extrémité du bobinage secondaire et la bougie d'allumage correspondante et notamment l'organe de sortie haute-tension qui se trouve en contact direct avec la bougie d'allumage à laquelle est associée la bobine.One of the problems to be solved on an ignition coil of this type is the realization of the high-voltage connection which allows the connection between the end of the secondary winding and the corresponding spark plug and in particular the output member. high voltage which is in direct contact with the spark plug with which the coil is associated.

Cet organe de sortie est habituellement constitué d'un charbon maintenu en contact avec l'extrémité de la bougie grâce à l'action d'un ressort.This outlet member usually consists of a carbon maintained in contact with the end of the spark plug by the action of a spring.

Un tel charbon est inévitablement l'objet d'une usure et d'une fragilisation dues en particulier aux températures élevées auxquelles il est soumis.Such charcoal is inevitably subject to wear and embrittlement due in particular to the high temperatures to which it is subjected.

De plus, le maintien dans son logement fait l'objet de solutions plus ou moins complexes qui augmentent de manière sensible le coût de la bobine d'allumage.In addition, maintaining in its housing is the subject of more or less complex solutions which significantly increase the cost of the ignition coil.

La présente invention résoud ces problèmes et propose à cet effet une bobine d'allumage, en particulier pour moteur à combustion interne de véhicule automobile, comportant, intégré à un boîtier un ensemble magnétique constitué notamment d'un noyau magnétique logé dans un bobineau primaire, un bobineau secondaire coaxial au bobineau primaire, des enroulements primaire et secondaire, un circuit magnétique de retour de flux constituant une armature métallique, un ensemble de liaison haute-tension comprenant notamment un insert fixé dans le bobineau secondaire, une potence haute-tension, un guide haute-tension dans lequel vient se loger l'organe de sortie haute-tension caractérisée en ce que cet organe est constitué d'un ressort.The present invention solves these problems and proposes for this purpose 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 secondary coil coaxial with the primary coil, primary and secondary windings, a magnetic flux return circuit constituting a metal frame, a high-voltage connection assembly comprising in particular an insert fixed in the secondary coil, a high-voltage bracket, a high-voltage guide in which the high-voltage output member is housed, characterized in that this member consists of a spring.

Suivant un autre aspect de l'invention la fixation des différents éléments constituant la liaison haute-tension et en particulier l'organe de sortie est assuré par la résine qui est coulée à l'intérieur du boîtier.According to another aspect of the invention, the fixing of the various elements constituting the high-voltage connection and in particular the output member is ensured by the resin which is poured inside the case.

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 dessus d'une potence haute-tension ;
  • - la figure 2 est une coupe suivant la ligne A-A de la figure 1 ;
  • - la figure 3 est une vue partielle de la potence haute-tension à plus grande échelle ;
  • - la figure 4 est une vue en coupe du guide haute-tension suivant la ligne B-B de la figure 5 ;
  • - la figure 5 est une vue de gauche du guide haute-tension ;
  • - la figure 6 est une vue de dessus du guide haute-tension ;
  • - la figure 7 est une vue de profil d'un insert haute-tension ;
  • - la figure 8 est une vue de l'insert haute-­tension suivant la flèche F2 de la figure 7 ;
  • - la figure 9 est une vue de l'insert haute-­tension suivant la flèche F2 de la figure 7 ;
  • - la figure 10 est une vue de dessous d'une bobine d'allumage complètement équipée suivant l'invention ;
  • - la figure 11 est une vue en coupe d'une bobine équipée suivant la ligne C-C de la figure 10.
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 top view of a high-voltage bracket;
  • - Figure 2 is a section along line AA of Figure 1;
  • - Figure 3 is a partial view of the high-voltage bracket on a larger scale;
  • - Figure 4 is a sectional view of the high-voltage guide along line BB of Figure 5;
  • - Figure 5 is a left view of the high-voltage guide;
  • - Figure 6 is a top view of the high-voltage guide;
  • - Figure 7 is a side view of a high-voltage insert;
  • - Figure 8 is a view of the high-voltage insert according to arrow F2 in Figure 7;
  • - Figure 9 is a view of the high-voltage insert along arrow F2 of Figure 7;
  • - Figure 10 is a bottom view of a fully equipped ignition coil according to the invention;
  • FIG. 11 is a sectional view of a coil fitted along the line CC of FIG. 10.

On se réfère aux figures 1 à 3 qui représentent une potence haute-tension 1 moulée en matière plastique isolante telle que P.B.T.Reference is made to FIGS. 1 to 3 which represent a high-voltage bracket 1 molded from insulating plastic material such as P.B.T.

Cette potence 1 est constituée d'un fût 2 de forme générale cylindrique à l'intérieur duquel un logement cylindrique 3 débouchant à l'une des extrémités du fût par une ouverture 4 dont le diamètre est inférieur à celui du logement 3, ménageant ainsi à l'intérieur dudit logement 3 un épaulement 5.This bracket 1 consists of a barrel 2 of generally cylindrical shape inside which a cylindrical housing 3 opening at one end of the barrel by an opening 4 whose diameter is smaller to that of the housing 3, thus providing inside the said housing 3 a shoulder 5.

Dans sa partie centrale, le fût 2 comprend une collerette 6 ménagée de matière et faisant saillie par rapport à la surface extérieure du fût 2.In its central part, the barrel 2 comprises a collar 6 made of material and projecting with respect to the external surface of the barrel 2.

L'extrémité du fût 2, opposée à l'extrémité comportant l'ouverture 4, se raccorde à une barrette 7 par l'intermédiaire de deux voiles 8 et 9 renforcés par des nervures, respectivement 10 et 11. La barrette 7 comporte deux pions 12 et 13.The end of the barrel 2, opposite the end comprising the opening 4, is connected to a bar 7 by means of two sails 8 and 9 reinforced by ribs, respectively 10 and 11. The bar 7 has two pins 12 and 13.

La paroi du fût 2 opposée à la barrette 7 comporte un débouché 14 dont la forme est représentée à échelle agrandie figure 3.The wall of the barrel 2 opposite the bar 7 has an outlet 14 whose shape is shown on an enlarged scale in FIG. 3.

Ce débouché 14 comprend à partir de la face 15 un évasement conique 16 constitué par les parois 16,17, une première fente constituée par les parois 18 et 19 et une seconde fente constituée par les parois 20 et 21, cette seconde fente étant plus large que la première.This outlet 14 comprises from the face 15 a conical flare 16 formed by the walls 16,17, a first slot formed by the walls 18 and 19 and a second slot formed by the walls 20 and 21, this second slot being wider than the first.

On se réfère maintenant aux figure 4 à 6 qui représentent un guide haute-tension 25 réalisé à partir d'une plaque de matériau conducteur tel que par exemple du laiton par découpage et estampage.Reference is now made to FIGS. 4 to 6 which represent a high-voltage guide 25 produced from a plate of conductive material such as for example brass by cutting and stamping.

Ce guide haute-tension 25 se présente sous la forme générale d'un tube 26 dont la paroi se prolonge à l'une de ses extrémités par une languette 27 horizontale comportant une patte verticale 28 dont l'extrémité 29 est de plus faible largeur.This high-voltage guide 25 is in the general form of a tube 26, the wall of which is extended at one of its ends by a horizontal tongue 27 comprising a vertical tab 28 whose end 29 is of smaller width.

Les figures 7 à 9 représentent un insert haute-­tension 30, réalisé en métal conducteur tel que laiton.Figures 7 to 9 show a high-voltage insert 30, made of conductive metal such as brass.

Cet insert 30 comprend une embase 31 sur l'une des faces de laquelle est ménagé un bossage 32 au centre duquel est agencée une fente 33. L'embase 31, le bossage 32 et la fente 33 sont de forme générale rectangulaire.This insert 30 comprises a base 31 on one of the faces of which is formed a boss 32 in the center of which a slot 33 is arranged. The base 31, the boss 32 and the slot 33 are of generally rectangular shape.

L'embase 31 se prolonge, d'une part, par une patte 34 dont l'extrémité 35 est chanfreinée et présente une section de forme générale trapézoïdale, d'autre part, par une languette 36 dont l'extrémité 3 est pliée à angle droit et se situe sur la face opposée de l'embase 31 par rapport à la patte 34.The base 31 is extended, on the one hand, by a lug 34, the end 35 of which is chamfered and has a generally trapezoidal section, on the other hand, by a tongue 36, the end 3 of which is bent at a right angle and is located on the opposite face of the base 31 relative to the tab 34.

La potence haute-tension 1, le guide haute-­tension 25, l'insert 30 font partie d'un ensemble constituant la liaison haute-tension de la bobine d'allumage monocylindre suivant l'invention.The high-voltage bracket 1, the high-voltage guide 25, the insert 30 form part of an assembly constituting the high-voltage connection of the single-cylinder ignition coil according to the invention.

Les figures 10 et 11 illustrent une telle bobine constituée notamment d'un boîtier 50 surmoulé en plastique et un connecteur 51 permettant l'alimentation basse-tension de la bobine.Figures 10 and 11 illustrate such a coil consisting in particular of a housing 50 molded in plastic and a connector 51 allowing the low-voltage supply of the coil.

Le circuit magnétique est fermé et comporte un enroulement primaire 52, bobiné autour d'un bobineau 53. Un noyau magnétique 54 de section rectangulaire et composé généralement de tôles magnétiques découpées et feuilletées est logé à l'intérieur du bobineau 53.The magnetic circuit is closed and has a primary winding 52, wound around a reel 53. A magnetic core 54 of rectangular section and generally composed of cut and laminated magnetic sheets is housed inside the reel 53.

Autour de cet ensemble, coaxialement au bobineau primaire 53, est disposé un bobineau secondaire 55 autour duquel est bobiné un enroulement secondaire 56.Around this assembly, coaxial with the primary winding 53, is arranged a secondary winding 55 around which a secondary winding 56 is wound.

Le bobineau secondaire 55 est maintenu en sustentation sur et autour du bobineau primaire 53.The secondary spool 55 is held in lift on and around the primary spool 53.

L'insert haute-tension 30, décrit plus haut, est introduit par l'extrémité 35 de sa patte 34 dans une fente prévue à cet effet dans le bobineau secondaire 55. Sur l'extrémité 37 de la languette 36 de l'insert 30 on vient souder l'extrémité du bobinage secondaire 56.The high-voltage insert 30, described above, is introduced through the end 35 of its tab 34 into a slot provided for this purpose in the secondary coil 55. On the end 37 of the tongue 36 of the insert 30 the end of the secondary winding 56 is welded.

L'ensemble comprenant notamment les bobineaux primaire 53 et secondaire 55 ainsi constitué est introduit dans le logement 57 du boîtier 50.The assembly comprising in particular the primary 53 and secondary 55 coils thus formed is introduced into the housing 57 of the housing 50.

Un circuit magnétique de retour de flux 59, dont on voit la forme générale en U, constitué de tôles magnétiques découpées et feuilletées, est incorporé par moulage au boîtier 50.A magnetic flux return circuit 59, the general U shape of which can be seen, consisting of cut and laminated magnetic sheets, is incorporated by molding in the housing 50.

Le circuit magnétique de retour de flux 59 constitue l'armature métallique du boîtier 50 et l'embase de fixation de l'ensemble de la bobine sur la culasse du moteur.The magnetic flux return circuit 59 constitutes the metal frame of the housing 50 and the base fixing the entire coil to the cylinder head of the engine.

A cet effet, aux quatre coins du rectangle ainsi constitué, sur la face supérieure 58, sont ménagées 4 fraisures 59a, 59b, 59c, 59d au centre desquelles sont prévus des trous 60a, 60b, 60c, 60d traversant le boîtier 50 et le circuit magnétique de retour de flux 59 desdites fraisures sont destinées à recevoir les vis de fixation (non représentées) de l'ensemble de la bobine.For this purpose, at the four corners of the rectangle thus formed, on the upper face 58, are formed 4 countersinks 59 a , 59 b , 59 c , 59 d in the center of which are provided holes 60 a , 60 b , 60 c , 60 d passing through the housing 50 and the magnetic flux return circuit 59 of said countersinks are intended to receive the fixing screws (not shown) of the entire coil.

Avant coulage d'une résine synthétique à l'intérieur du boîtier pour immobiliser et isoler les différents constituants, on réalise l'ensemble de liaison haute-tension.Before pouring a synthetic resin inside the housing to immobilize and isolate the various constituents, the high-voltage connection assembly is produced.

Suivant l'invention, cet ensemble de liaison haute-tension est constitué d'un ressort 61 qui est introduit dans le guide haute-tension 25 jusqu'à ce qu'il vienne en butée contre sa languette 27 (figure 4).According to the invention, this high-voltage connection assembly consists of a spring 61 which is introduced into the high-voltage guide 25 until it comes into abutment against its tongue 27 (FIG. 4).

Ce ressort 61 venant en contact direct avec la bougie d'allumage associée à la bobine assure donc la transmission de la haute-tension, et constitue l'organe de sortie haute-tension.This spring 61 coming into direct contact with the spark plug associated with the coil therefore ensures the transmission of the high-voltage, and constitutes the high-voltage output member.

Le guide haute-tension 25 équipé du ressort 61 est introduit dans le logement 3 de la potence haute-­tension 1 et est fixé dans celle-ci par encliquetage de la patte 27 du guide 25 dans la fente 20,21 (figures 2 et 3) du débouché 14 de la potence 1.The high-voltage guide 25 fitted with the spring 61 is inserted into the housing 3 of the high-voltage bracket 1 and is fixed therein by snap-fastening the tab 27 of the guide 25 into the slot 20, 21 (FIGS. 2 and 3) ) of the outlet 14 of the bracket 1.

Cet ensemble de liaison haute-tension ainsi réalisé est positionné dans le boîtier sur le bobineau secondaire 55 déjà mis en place.This high-voltage connection assembly thus produced is positioned in the housing on the secondary winding 55 already installed.

Ce positionnement est assuré, d'une part, par pénétration des pions 12 et 13 de la barrette 7 de la potence 1 dans des logements correspondants prévus à cet effet dans le bobineau secondaire 55, d'autre part, par pénétration de l'extrémité amincie 29 de la patte 28 du guide 25 dans la fente 33 de l'insert haute-tension 30.This positioning is ensured, on the one hand, by penetration of the pins 12 and 13 of the bar 7 of the bracket 1 into corresponding housings provided for this purpose in the secondary coil 55, on the other hand, by penetration of the end thinned 29 of the tab 28 of the guide 25 in the slot 33 of the high-voltage insert 30.

L'ensemble haute-tension étant ainsi positionné dans le logement 57 du boîtier 50 on coule de la résine synthétique qui le remplit jusqu'à un niveau N proche de celui de la face 62 du boîtier 50.The high-voltage assembly is thus positioned in the housing 57 of the housing 50 synthetic resin is poured which fills it up to a level N close to that of the face 62 of the housing 50.

On s'arrange pour que ce niveau N soit toujours supérieur au niveau N′ correspondant à l'extrémité du ressort 61 dans le guide haute-tension 25.It is arranged that this level N is always greater than the level N ′ corresponding to the end of the spring 61 in the high-voltage guide 25.

Suivant l'invention, le durcissement de la résine immobilise tous les constituants à l'intérieur du boîtier 50 et en particulier le ressort 61.According to the invention, the hardening of the resin immobilizes all the constituents inside the housing 50 and in particular the spring 61.

On a ainsi réalisé notamment avec le ressort 61 une liaison haute-tension présentant de nombreux avantages : plus de pièce d'usure, résistance aux vibrations, fixation aisée.A high-voltage connection has thus been produced in particular with the spring 61, presenting numerous advantages: no more wearing part, resistance to vibrations, easy fixing.

On remarquera que, lorsque la bobine est fixée sur la culasse du moteur, la face 62 du boîtier 50 présentant la résine se trouve en bas comme illustré sur la figure 11 et se trouve donc naturellement protégée contre les agressions.It will be noted that, when the coil is fixed on the cylinder head of the engine, the face 62 of the housing 50 having the resin is at the bottom as illustrated in FIG. 11 and is therefore naturally protected against attack.

Claims (5)

1) Bobine d'allumage, en particulier pour moteur à combustion interne de véhicule automobile, comportant, intégré à un boîtier (50) un ensemble magnétique constitué notamment d'un noyau magnétique (54) logé dans un bobineau primaire (53), un bobineau secondaire (55) coaxial au bobineau primaire (53) des enroulements primaire (52) et secondaire (56), un circuit magnétique de retour de flux (59) constituant une armature métallique, un ensemble de liaison haute-tension comprenant notamment un insert (30) fixé dans le bobineau secondaire (55), une potence haute-tension (1), un guide haute-tension (25) dans lequel vient se loger l'organe de sortie haute-tension, caractérisée en ce que cet organe est constitué d'un ressort (61).1) Ignition coil, in particular for an internal combustion engine of a motor vehicle, comprising, integrated into a housing (50) a magnetic assembly consisting in particular of a magnetic core (54) housed in a primary coil (53), a secondary winding (55) coaxial with the primary winding (53) of the primary (52) and secondary (56) windings, a magnetic flux return circuit (59) constituting a metal frame, a high-voltage connection assembly comprising in particular an insert (30) fixed in the secondary coil (55), a high-voltage bracket (1), a high-voltage guide (25) in which is housed the high-voltage output member, characterized in that this member is consisting of a spring (61). 2) Bobine d'allumage selon la revendication 1, comprenant des moyens de fixation du ressort (61) dans le guide haute-tension (25), caractérisée en ce que lesdits moyens de fixation sont constitués par la résine coulée dans le boîtier (50).2) Ignition coil according to claim 1, comprising means for fixing the spring (61) in the high-voltage guide (25), characterized in that said fixing means consist of the resin poured into the housing (50 ). 3) Bobine d'allumage selon la revendication 1, comprenant des moyens de positionnement de l'ensemble de liaison haute-tension dans le boîtier (50), caractérisée en ce que lesdits moyens de positionnement sont constitués de pions (13,14) ménagés de matière sur une barrette (7) de la potence haute-tension (1).3) Ignition coil according to claim 1, comprising means for positioning the high-voltage connection assembly in the housing (50), characterized in that said positioning means consist of pins (13,14) formed of material on a bar (7) of the high-voltage bracket (1). 4) Bobine d'allumage selon la revendication 3, caractérisée en ce que les moyens de positionnement de l'ensemble de liaison haute-tension dans le boîtier (50) sont constitués d'une extrémité amincie (29) d'une languette (27) du guide haute-tension (25) coopérant avec une fente (33) ménagée dans l'insert (30).4) Ignition coil according to claim 3, characterized in that the means for positioning the high-voltage connection assembly in the housing (50) consist of a thinned end (29) of a tongue (27 ) of the high-voltage guide (25) cooperating with a slot (33) formed in the insert (30). 5) Bobine d'allumage selon la revendication 1, comprenant des moyens de fixation du guide haute-tension (25) dans la potence haute-tension (1), caractérisée en ce que lesdits moyens de fixation sont constitués d'une languette (27) du guide haute-tension (25) coopérant par encliquetage avec un débouché (14) ménagé dans la potence haute-tension (1).5) Ignition coil according to claim 1, comprising means for fixing the high-voltage guide (25) in the high-voltage bracket (1), characterized in that said fixing means consist of a tongue (27) of the high-voltage guide (25) cooperating by snap-fastening with an outlet (14) formed in the high-voltage bracket (1).
EP90402485A 1989-09-15 1990-09-11 High voltage connection for an ignition coil, particularly for an internal combustion engine of an automotive vehicle Expired - Lifetime EP0418136B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8912087A FR2652196B1 (en) 1989-09-15 1989-09-15 HIGH-VOLTAGE CONNECTIONS OF AN IGNITION COIL, PARTICULARLY FOR AN INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE.
FR8912087 1989-09-15

Publications (2)

Publication Number Publication Date
EP0418136A1 true EP0418136A1 (en) 1991-03-20
EP0418136B1 EP0418136B1 (en) 1994-01-12

Family

ID=9385502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90402485A Expired - Lifetime EP0418136B1 (en) 1989-09-15 1990-09-11 High voltage connection for an ignition coil, particularly for an internal combustion engine of an automotive vehicle

Country Status (6)

Country Link
US (1) US5041807A (en)
EP (1) EP0418136B1 (en)
JP (1) JPH03117683A (en)
DE (1) DE69005953T2 (en)
ES (1) ES2048463T3 (en)
FR (1) FR2652196B1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5357233A (en) * 1991-08-23 1994-10-18 Nippondenso Co., Ltd. Ignition apparatus for internal combustion engine
JP2981702B2 (en) * 1992-08-27 1999-11-22 愛三工業株式会社 Ignition coil for internal combustion engine
US5406242A (en) * 1994-01-10 1995-04-11 Ford Motor Company Ignition coil
JPH0845754A (en) * 1994-07-26 1996-02-16 Aisan Ind Co Ltd Ignition coil for internal combustion engine
US6264183B1 (en) * 1999-08-19 2001-07-24 Precision Products Group Methods of manufacturing coils and apparatus for same
JP2008021794A (en) * 2006-07-12 2008-01-31 Hanshin Electric Co Ltd Ignition coil for internal combustion engine
JP2008187026A (en) * 2007-01-30 2008-08-14 Diamond Electric Mfg Co Ltd Ignition coil for internal combustion engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2447376A (en) * 1943-05-28 1948-08-17 Bendix Aviat Corp Ignition apparatus
GB803640A (en) * 1954-04-20 1958-10-29 Eric Lionel Hutchings Electric sleeve connectors
GB975268A (en) * 1960-06-03 1964-11-11 Western Electric Co Electrical connectors
FR2526992A1 (en) * 1982-05-12 1983-11-18 Bosch Gmbh Robert IGNITION COIL FOR INTERNAL COMBUSTION ENGINE IGNITION INSTALLATION
DE8518139U1 (en) * 1985-06-22 1986-10-16 PVL Probosch-Vogt-Loos GmbH & Co Electronic KG, 8501 Cadolzburg Ignition coil integrated with a spark plug connector
GB2199193A (en) * 1986-11-21 1988-06-29 Nippon Denso Co Ignition coil

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2447376A (en) * 1943-05-28 1948-08-17 Bendix Aviat Corp Ignition apparatus
GB803640A (en) * 1954-04-20 1958-10-29 Eric Lionel Hutchings Electric sleeve connectors
GB975268A (en) * 1960-06-03 1964-11-11 Western Electric Co Electrical connectors
FR2526992A1 (en) * 1982-05-12 1983-11-18 Bosch Gmbh Robert IGNITION COIL FOR INTERNAL COMBUSTION ENGINE IGNITION INSTALLATION
DE8518139U1 (en) * 1985-06-22 1986-10-16 PVL Probosch-Vogt-Loos GmbH & Co Electronic KG, 8501 Cadolzburg Ignition coil integrated with a spark plug connector
GB2199193A (en) * 1986-11-21 1988-06-29 Nippon Denso Co Ignition coil

Also Published As

Publication number Publication date
JPH03117683A (en) 1991-05-20
DE69005953D1 (en) 1994-02-24
DE69005953T2 (en) 1994-08-11
FR2652196A1 (en) 1991-03-22
EP0418136B1 (en) 1994-01-12
US5041807A (en) 1991-08-20
FR2652196B1 (en) 1992-01-31
ES2048463T3 (en) 1994-03-16

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