EP0418137A1 - Ignition coil, particularly for an internal combustion engine of an automotive vehicle - Google Patents

Ignition coil, particularly for an internal combustion engine of an automotive vehicle Download PDF

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Publication number
EP0418137A1
EP0418137A1 EP90402486A EP90402486A EP0418137A1 EP 0418137 A1 EP0418137 A1 EP 0418137A1 EP 90402486 A EP90402486 A EP 90402486A EP 90402486 A EP90402486 A EP 90402486A EP 0418137 A1 EP0418137 A1 EP 0418137A1
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EP
European Patent Office
Prior art keywords
voltage
magnetic flux
magnetic
return circuit
ignition coil
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Granted
Application number
EP90402486A
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German (de)
French (fr)
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EP0418137B1 (en
Inventor
Eric Badaud
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Sagem SA
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Sagem Allumage SA
Valeo Electronique SA
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Publication of EP0418137A1 publication Critical patent/EP0418137A1/en
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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

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.
  • 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, a high-voltage link assembly comprising in particular a high-voltage bracket, a high-voltage guide in which is housed a high-output outlet voltage, characterized in that said magnetic flux return circuit comprises at least three orthogonal parts two by two forming in section a U, constituting the three sides of a rectangle in which is inscribed said magnetic flux return circuit, and in that said high-voltage output member is arranged so that it occurs in a direction passing through the c between said rectangle.
  • said rectangle is formed by the housing and the magnetic flux return circuit which is U-shaped, the branches of which extend beyond one of the faces of the central core.
  • the high-voltage output member is centered relative to the fixing points of the coil which are located at the four corners of said rectangle.
  • a single-cylinder ignition coil according to the invention comprises a closed magnetic circuit comprising a primary winding 1 wound around a primary coil 2.
  • 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 formed is introduced into the housing 6 of a housing 7 made of insulating material.
  • a magnetic flux return circuit 8 made up of cut and laminated magnetic sheets is incorporated by molding in the housing 7.
  • said magnetic flux return circuit comprises three orthogonal portions 8 a, 8 b, 8 c pairwise section in a U constituting the three sides of a rectangle.
  • the branches 8 a , 8 b of the U constituting the magnetic flux return circuit 8 do not extend beyond the central magnetic core 3, that is to say that their ends correspond to line XX, shown in Figure 1.
  • the branches 8 a , 8 b are extended by a length 1 beyond the line XX ′ corresponding to one of the faces of the central magnetic core 3.
  • the magnetic flux return circuit 8 and therefore the housing 7 in which it is molded completely encompasses the secondary coil 5 and therefore the primary P and secondary S magnetic assemblies.
  • this extension of the branches 8 a , 8 b has an additional heat exchange surface and therefore allows better cooling of the entire ignition coil.
  • This particular arrangement also allows the magnetic flux return circuit 8 to have a general rectangular outline in combination with the housing 7 facilitating the fixing of the entire ignition coil to the engine block.
  • This fixing is provided by screws (not shown) passing through holes 10 a , 10 b , 10 c , 10 d formed at the four corners of the rectangle formed by the magnetic flux return circuit 8.
  • said magnetic flux return circuit 8 comprises the means for fixing the ignition coil and constitutes the metal frame of the housing 7.
  • a connector 11, made integral with the housing 7 by overmolding allows the low voltage supply of the coil.
  • the high-voltage output assembly of the ignition coil comprises a high-voltage bracket 12 consisting of a barrel 13 of generally cylindrical shape connecting to a strip 14 by means of two sails 15, 6, said strip 14 comprising two pawns 17,18.
  • the high-voltage output assembly also includes a high-voltage guide 19 which is in the general form of a tube, one of its ends of which is extended by a horizontal tongue 20 made from material, this tongue having a vertical tab. 21.
  • a spring 22 constituting the high-voltage output member is introduced into the high-voltage guide 19 until it comes into abutment against the tongue 20.
  • the high-voltage guide 19 fitted with the spring 22 is introduced inside the barrel 13 of the high-voltage bracket 12 and is fixed therein by a latching system which, not forming part of the present invention, was not represented.
  • This high-voltage connection assembly thus produced is positioned in the housing 7 on the secondary coil 4 already installed.
  • Resin is then poured into the housing 6 of the housing 7 and the hardening of the resin immobilizes all the constituents by isolating them from each other.
  • the general design of the ignition coil is such that, according to the invention, the axis YY ′ of the high-voltage output member, constituted here by the spring 19 , is centered relative to the rectangle constituted by the magnetic flux return circuit 8, the axis YY ′ being located at a point corresponding to the crossing of the diagonals of said rectangle, diagonals on which there are the fixing holes 10 a , 10 b , 10 c , 10 d .

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

Abstract

Ignition coil, particularly for a motor vehicle internal combustion engine, comprising, integrated in a housing (7) a magnetic assembly consisting in particular of a magnetic core (3) accommodated in a primary coil holder (2), a secondary coil holder (4) coaxial with the first coil holder (2), primary (1) and secondary (5) windings, a magnetic flux-return circuit (8), a high-voltage link assembly comprising in particular a high-voltage bracket (12), a high-voltage guide (20) in which a high-voltage output member (19) is accommodated, characterised in that the said magnetic flux-return circuit (8) comprises at least three pairwise orthogonal parts (8a, 8b, 8c) forming a U in cross-section, constituting the three sides of a rectangle inside which the said magnetic flux-return circuit (8) is inscribed, and in that the said high-voltage output member (19) is arranged so that it is oriented in a direction passing through the centre (Y-Y') of the said rectangle. <IMAGE>

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 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.

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 de manière connue en soi, 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 de la bobine d'allumage.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.

L'organe de sortie haute-tension d'une telle bobine étant en contact direct avec la bougie d'allumage à laquelle elle est associée il est donc nécessaire que sa conception soit telle qu'elle permette sa fixation sur le bloc-moteur de la manière la plus simple possible, cette fixation devant alors être réalisée en quatre points distincts, ces quatre points devant dans toute la mesure du possible présenter une symétrie par rapport à l'axe de la sortie haute-tension.The high-voltage output member of such a coil being in direct contact with the spark plug with which it is associated, it is therefore necessary that its design is such that it allows its attachment to the engine block of the in the simplest possible way, this fixing then having to be carried out at four distinct points, these four points having as far as possible to present a symmetry with respect to the axis of the high-voltage output.

Pour résoudre ces problèmes la présente invention propose 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, un ensemble de liaison haute-tension comprenant notamment une potence haute-tension, un guide haute-tension dans lequel vient se loger un organe de sortie haute-tension, caractérisée en ce que ledit circuit magnétique de retour de flux comporte au moins trois parties orthogonales deux à deux formant en section un U, constituant les trois côtés d'un rectangle dans lequel est inscrit ledit circuit magnétique de retour de flux, et en ce que ledit organe de sortie haute-tension est disposé de telle sorte qu'il se présente dans une direction passant par le centre dudit rectangle.To solve these problems, the present invention provides 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, a high-voltage link assembly comprising in particular a high-voltage bracket, a high-voltage guide in which is housed a high-output outlet voltage, characterized in that said magnetic flux return circuit comprises at least three orthogonal parts two by two forming in section a U, constituting the three sides of a rectangle in which is inscribed said magnetic flux return circuit, and in that said high-voltage output member is arranged so that it occurs in a direction passing through the c between said rectangle.

Selon un autre aspect de l'invention ledit rectangle est formé par le boîtier et le circuit magnétique de retour de flux qui est en forme de U dont les branches se prolongent au-delà d'une des faces du noyau central.According to another aspect of the invention, said rectangle is formed by the housing and the magnetic flux return circuit which is U-shaped, the branches of which extend beyond one of the faces of the central core.

Ainsi, l'organe de sortie haute-tension est centré par rapport aux points de fixation de la bobine qui se situent aux quatre angles dudit rectangle.Thus, the high-voltage output member is centered relative to the fixing points of the coil which are located at the four corners of said rectangle.

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 dessous d'une bobine d'allumage complétement équipée suivant l'invention ;
  • - la figure 2 est une vue en coupe d'une bobine équipée suivant la ligne A-A de la figure 1.
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 bottom view of a fully equipped ignition coil according to the invention;
  • - Figure 2 is a sectional view of a coil fitted along the line AA of Figure 1.

Une bobine d'allumage monocylindre suivant l'invention comprend un circuit magnétique fermé comportant un enroulement primaire 1 bobiné autour d'un bobineau primaire 2.A single-cylinder ignition coil according to the invention comprises a closed magnetic circuit comprising a primary winding 1 wound around a primary coil 2.

Un noyau central magnétique 3, de contour rectangulaire et composé généralement, de tôles magnétiques découpées et feuilletées, est logé à l'intérieur du bobineau primaire 2.A central magnetic core 3, of rectangular outline and generally composed of cut and laminated magnetic sheets, is housed inside the primary coil 2.

Autour de cet ensemble, que nous appellerons ensemble primaire P, est disposé un bobineau secondaire 4 autour duquel est bobiné un enroulement secondaire 5, et que nous appellerons ensemble secondaire S.Around this assembly, which we will call primary assembly P, is disposed a secondary coil 4 around which a secondary winding 5 is wound, and which we will call secondary assembly S.

L'ensemble secondaire S est maintenu en sustentation sur et autour de l'ensemble primaire P.The secondary assembly S is held in lift on and around the primary assembly P.

Les ensembles primaire P et secondaire S étant assemblés l'un dans l'autre, le circuit magnétique ainsi constitué est introduit dans le logement 6 d'un boîtier 7 réalisé en matière isolante.The primary P and secondary S assemblies being assembled one inside the other, the magnetic circuit thus formed is introduced into the housing 6 of a housing 7 made of insulating material.

Un circuit magnétique de retour de flux 8 constitué de tôles magnétiques découpées et feuilletées, est incorporé par moulage au boîtier 7.A magnetic flux return circuit 8 made up of cut and laminated magnetic sheets is incorporated by molding in the housing 7.

Selon l'invention, ledit circuit magnétique de retour de flux comporte trois parties orthogonales 8a,8b,8c deux à deux formant en section un U constituant les trois côtés d'un rectangle.According to the invention, said magnetic flux return circuit comprises three orthogonal portions 8 a, 8 b, 8 c pairwise section in a U constituting the three sides of a rectangle.

Après moulage, seules apparaissent les surfaces 9a,9b d'encoches ménagées dans les branches 8a,8b du U constituant le circuit magnétique de retour de flux 8.After molding, only the surfaces 9 a , 9 b of notches formed in the branches 8 a , 8 b of the U constituting the magnetic flux return circuit 8 appear.

Ces surfaces 9a,9b de forme générale rectangulaire, sont en vis-à-vis des extrémités du noyau central magnétique 3.These surfaces 9 a , 9 b of generally rectangular shape, face the ends of the central magnetic core 3.

Habituellement, dans des bobines de ce type les branches 8a,8b du U constituant le circuit magnétique retour de flux 8 ne s'étendent pas au-delà du noyau central magnétique 3 c'est-à-dire que leurs extrémités correspondent à la ligne X-X, représentée sur la figure 1.Usually, in coils of this type, the branches 8 a , 8 b of the U constituting the magnetic flux return circuit 8 do not extend beyond the central magnetic core 3, that is to say that their ends correspond to line XX, shown in Figure 1.

En effet, une telle disposition satisfait aux conditions d'un fonctionnement correct de l'ensemble du circuit magnétique et correspond à une économie de matière et donc de coût.Indeed, such an arrangement satisfies the conditions for correct operation of the entire magnetic circuit and corresponds to a saving of material and therefore of cost.

Dans le cas présent, au contraire, suivant l'invention les branches 8a,8b sont prolongées d'une longueur 1 au-delà de la ligne X-X′ correspondant à l'une des faces du noyau central magnétique 3.In the present case, on the contrary, according to the invention, the branches 8 a , 8 b are extended by a length 1 beyond the line XX ′ corresponding to one of the faces of the central magnetic core 3.

Ainsi le circuit magnétique retour de flux 8 et donc le boîtier 7 dans lequel il est moulé englobent complètement le bobineau secondaire 5 et donc les ensembles magnétiques primaire P et secondaire S.Thus the magnetic flux return circuit 8 and therefore the housing 7 in which it is molded completely encompasses the secondary coil 5 and therefore the primary P and secondary S magnetic assemblies.

De plus, ce prolongement des branches 8a,8b présente une surface supplémentaire d'échange thermique et permet donc un meilleur refroidissement de l'ensemble de la bobine d'allumage.In addition, this extension of the branches 8 a , 8 b has an additional heat exchange surface and therefore allows better cooling of the entire ignition coil.

Cette disposition particulière permet en outre au circuit magnétique retour de flux 8 de présenter un contour général rectangulaire en combinaison avec le boîtier 7 facilitant la fixation de l'ensemble de la bobine d'allumage sur le bloc moteur.This particular arrangement also allows the magnetic flux return circuit 8 to have a general rectangular outline in combination with the housing 7 facilitating the fixing of the entire ignition coil to the engine block.

Cette fixation est assurée par des vis (non représentées) passant à travers des trous 10a,10b,10c,10d ménagés aux quatre angles du rectangle que constitue le circuit magnétique retour de flux 8.This fixing is provided by screws (not shown) passing through holes 10 a , 10 b , 10 c , 10 d formed at the four corners of the rectangle formed by the magnetic flux return circuit 8.

Ainsi, ledit circuit magnétique retour de flux 8 comprend les moyens de fixation de la bobine d'allumage et constitue l'armature métallique du boîtier 7.Thus, said magnetic flux return circuit 8 comprises the means for fixing the ignition coil and constitutes the metal frame of the housing 7.

Un connecteur 11, rendu solidaire du boîtier 7 par surmoulage permet l'alimentation basse tension de la bobine.A connector 11, made integral with the housing 7 by overmolding allows the low voltage supply of the coil.

L'ensemble sortie haute-tension de la bobine d'allumage comprend une potence haute-tension 12 constituée d'un fût 13 de forme générale cylindrique se raccordant à une barrette 14 par l'intermédiaire de deux voiles 15,6, ladite barrette 14 comprenant deux pions 17,18.The high-voltage output assembly of the ignition coil comprises a high-voltage bracket 12 consisting of a barrel 13 of generally cylindrical shape connecting to a strip 14 by means of two sails 15, 6, said strip 14 comprising two pawns 17,18.

L'ensemble sortie haute-tension comprend également un guide haute-tension 19 qui se présente sous la forme générale d'un tube dont l'une de ses extrémités se prolonge par une languette horizontale 20 issue de matière, cette languette présentant une patte verticale 21.The high-voltage output assembly also includes a high-voltage guide 19 which is in the general form of a tube, one of its ends of which is extended by a horizontal tongue 20 made from material, this tongue having a vertical tab. 21.

Un ressort 22 constituant l'organe de sortie haute-tension est introduit dans le guide haute-tension 19 jusqu'à ce qu'il vienne en butée contre la languette 20.A spring 22 constituting the high-voltage output member is introduced into the high-voltage guide 19 until it comes into abutment against the tongue 20.

Le guide haute-tension 19 équipé du ressort 22 est introduit à l'intérieur du fût 13 de la potence haute-tension 12 et est fixé dans celle-ci par un système d'encliquetage qui, ne faisant pas partie de la présente invention, n'a pas été représenté.The high-voltage guide 19 fitted with the spring 22 is introduced inside the barrel 13 of the high-voltage bracket 12 and is fixed therein by a latching system which, not forming part of the present invention, was not represented.

Cet ensemble de liaison haute-tension ainsi réalisé est positionné dans le boîtier 7 sur le bobineau secondaire 4 déjà mis en place.This high-voltage connection assembly thus produced is positioned in the housing 7 on the secondary coil 4 already installed.

Ce positionnement est assuré, d'une part, par pénétration des pions 17,18 de la barrette 14 de la potence haute-tension 12 dans des logements correspondants prévus à cet effet dans le bobineau secondaire 4, d'autre part, par pénétration de l'extrémité 21 de la languette 20 du guide haute-tension 19 dans une fente ménagée dan un insert métallique 23 préalablement assemblé au bobineau secondaire 4.This positioning is ensured, on the one hand, by penetration of the pins 17, 18 of the bar 14 of the high-voltage bracket 12 in corresponding housings provided for this purpose in the coil. secondary 4, on the other hand, by penetration of the end 21 of the tongue 20 of the high-voltage guide 19 into a slot made in a metal insert 23 previously assembled to the secondary coil 4.

De la résine est ensuite coulée dans le logement 6 du boîtier 7 et le durcissement de la résine immobilise tous les constituants en les isolant les uns par rapport aux autres.Resin is then poured into the housing 6 of the housing 7 and the hardening of the resin immobilizes all the constituents by isolating them from each other.

En particulier l'immobilisation du ressort 19 est ainsi considérablement simplifiée puisqu'elle ne nécessite aucune pièce.In particular, the immobilization of the spring 19 is thus considerably simplified since it requires no parts.

On remarquera, en particulier sur la figure 1, que la conception générale de la bobine d'allumage est telle que, suivant l'invention, l'axe Y-Y′ de l'organe de sortie haute-tension, constitué ici par le ressort 19, est centré par rapport au rectangle constitué par le circuit magnétique retour de flux 8, l'axe Y-Y′ se situant en un point correspondant au croisement des diagonales dudit rectangle, diagonales sur lesquelles on trouve les trous de fixation 10a,10b,10c,10d.It will be noted, in particular in FIG. 1, that the general design of the ignition coil is such that, according to the invention, the axis YY ′ of the high-voltage output member, constituted here by the spring 19 , is centered relative to the rectangle constituted by the magnetic flux return circuit 8, the axis YY ′ being located at a point corresponding to the crossing of the diagonals of said rectangle, diagonals on which there are the fixing holes 10 a , 10 b , 10 c , 10 d .

La mise en place de la bobine d'allumage sur le bloc-moteur s'en trouve simplifiée et cet ensemble de dispositions permet également une meilleure répartition du poids par rapport, aux quatre points de fixation.The installation of the ignition coil on the engine block is simplified and this set of provisions also allows a better distribution of the weight with respect to the four fixing points.

On remarquera que, lorsque la bobine est fixée sur le bloc-moteur, la face inférieure du boîtier 7 présentant la résine se trouve en bas comme illustré sur la figure 2 et se trouve donc naturellement protégée contre les agressions.It will be noted that, when the coil is fixed to the engine block, the underside of the housing 7 having the resin is located at the bottom as illustrated in FIG. 2 and is therefore naturally protected against attack.

Claims (3)

1) Bobine d'allumage, en particulier pour moteur à combustion interne de véhicule automobile, comportant, intégré à un boîtier (7) un ensemble magnétique constitué notamment d'un noyau magnétique (3) logé dans un bobineau primaire (2), un bobineau secondaire (4) coaxial au bobineau primaire (2), des enroulements primaire (1) et secondaire (5), un circuit magnétique de retour de flux (8), un ensemble de liaison haute-tension comprenant notamment une potence haute-tension (12), un guide haute-tension (20) dans lequel vient se loger un organe de sortie haute-tension (19), caractérisée en ce que ledit circuit magnétique de retour de flux (8) comporte au moins trois parties orthogonales deux à deux (8a,8b,8c,) formant en section un U, constituant les trois côtés d'un rectangle dans lequel est inscrit ledit circuit magnétique de retour de flux (8), et en ce que ledit organe de sortie haute-tension (19) est disposé de telle sorte qu'il se présente dans une direction passant par le centre (Y-Y′) dudit rectangle.1) Ignition coil, in particular for an internal combustion engine of a motor vehicle, comprising, integrated into a housing (7) a magnetic assembly consisting in particular of a magnetic core (3) housed in a primary coil (2), a secondary winding (4) coaxial with the primary winding (2), primary (1) and secondary (5) windings, a magnetic flux return circuit (8), a high-voltage connection assembly comprising in particular a high-voltage bracket (12), a high-voltage guide (20) in which is housed a high-voltage output member (19), characterized in that said magnetic flux return circuit (8) comprises at least three orthogonal parts two to two (8 a , 8 b , 8 c ,) forming in section a U, constituting the three sides of a rectangle in which is inscribed said magnetic flux return circuit (8), and in that said output member high -tension (19) is arranged so that it occurs in one direction passing through the center (YY ′) of said rectangle. 2) Bobine d'allumage suivant la revendication 1, caractérisée en ce que les parties (8a,8b) du circuit magnétique de retour de flux (8) constituant les branches du U sont prolongées d'une longueur (1) par rapport à la face (X'X′) du noyau central (3).2) Ignition coil according to Claim 1, characterized in that the parts (8 a, 8 b) of the magnetic circuit return flow (8) constituting the branches of the U are extended by a length (1) relative to the face (X'X ′) of the central core (3). 3) Bobine d'allumage, suivant l'une des revendications précédentes comprenant des moyens de fixation de l'organe de sortie haute-tension (19) dans le guide haute-tension (20), caractérisée en ce que lesdits moyens de fixation sont constitués par la résine coulée dans le boîtier (7).3) Ignition coil, according to one of the preceding claims comprising means for fixing the high-voltage output member (19) in the high-voltage guide (20), characterized in that said fixing means are formed by the resin poured into the housing (7).
EP19900402486 1989-09-15 1990-09-11 Ignition coil, particularly for an internal combustion engine of an automotive vehicle Expired - Lifetime EP0418137B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8912088A FR2652195B1 (en) 1989-09-15 1989-09-15 IGNITION COIL, PARTICULARLY FOR AN INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE.
FR8912088 1989-09-15

Publications (2)

Publication Number Publication Date
EP0418137A1 true EP0418137A1 (en) 1991-03-20
EP0418137B1 EP0418137B1 (en) 1994-01-12

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EP19900402486 Expired - Lifetime EP0418137B1 (en) 1989-09-15 1990-09-11 Ignition coil, particularly for an internal combustion engine of an automotive vehicle

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EP (1) EP0418137B1 (en)
JP (1) JPH03108305A (en)
DE (1) DE69005955T2 (en)
ES (1) ES2048464T3 (en)
FR (1) FR2652195B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022744A1 (en) * 1991-06-13 1992-12-23 Robert Bosch Gmbh Coil core with earth contact
FR2716238A1 (en) * 1994-02-17 1995-08-18 Bosch Gmbh Robert Ignition coil for an internal combustion engine having a main core surrounded by a reflux core.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1608891A (en) * 1926-02-03 1926-11-30 North East Electric Co Ignition coil
EP0066749A1 (en) * 1981-06-01 1982-12-15 Aisin Seiki Kabushiki Kaisha Ignition system for internal-combustion engines
GB2173047A (en) * 1985-03-25 1986-10-01 Hitachi Ltd An ignition coil assembly for an internal combustion engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1608891A (en) * 1926-02-03 1926-11-30 North East Electric Co Ignition coil
EP0066749A1 (en) * 1981-06-01 1982-12-15 Aisin Seiki Kabushiki Kaisha Ignition system for internal-combustion engines
GB2173047A (en) * 1985-03-25 1986-10-01 Hitachi Ltd An ignition coil assembly for an internal combustion engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022744A1 (en) * 1991-06-13 1992-12-23 Robert Bosch Gmbh Coil core with earth contact
AU651449B2 (en) * 1991-06-13 1994-07-21 Robert Bosch Gmbh Coil core with earth contact
US5398014A (en) * 1991-06-13 1995-03-14 Robert Bosch Gmbh Core having earth contacting
FR2716238A1 (en) * 1994-02-17 1995-08-18 Bosch Gmbh Robert Ignition coil for an internal combustion engine having a main core surrounded by a reflux core.
US5497756A (en) * 1994-02-17 1996-03-12 Robert Bosch Gmbh Ignition coil for an internal combustion engine
ES2116876A1 (en) * 1994-02-17 1998-07-16 Bosch Gmbh Robert Ignition coil for an internal combustion engine
DE4404957C2 (en) * 1994-02-17 2003-08-21 Bosch Gmbh Robert Ignition coil for an internal combustion engine

Also Published As

Publication number Publication date
FR2652195B1 (en) 1992-01-31
EP0418137B1 (en) 1994-01-12
JPH03108305A (en) 1991-05-08
FR2652195A1 (en) 1991-03-22
DE69005955D1 (en) 1994-02-24
ES2048464T3 (en) 1994-03-16
DE69005955T2 (en) 1994-07-07

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