EP1934466B1 - Device for connecting a connector to a solenoid driving an injector - Google Patents

Device for connecting a connector to a solenoid driving an injector Download PDF

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Publication number
EP1934466B1
EP1934466B1 EP06808133A EP06808133A EP1934466B1 EP 1934466 B1 EP1934466 B1 EP 1934466B1 EP 06808133 A EP06808133 A EP 06808133A EP 06808133 A EP06808133 A EP 06808133A EP 1934466 B1 EP1934466 B1 EP 1934466B1
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EP
European Patent Office
Prior art keywords
solenoid
connection device
connector
electromagnet
pin
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EP06808133A
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German (de)
French (fr)
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EP1934466A1 (en
Inventor
Gérard Desaint
Jean-Louis Magnaval
Pascal Audineau
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BorgWarner Inc
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BorgWarner Inc
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Publication of EP1934466A1 publication Critical patent/EP1934466A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails

Definitions

  • the present invention relates to a device for connecting a mechanical, hydraulic and electrical connector equipping a fuel injector of the engine with the electromagnet of the injector.
  • This connector is in fact intended to be fixed to the body surrounding said electromagnet.
  • the triple function of the connector imposes a mode of attachment to said body that respects the constraints and characteristics associated with each of the functions and allows them to coexist.
  • the upper part of the injector that constitutes their assembly must allow a hydraulic return of the piloting fluid of the injector.
  • the mechanical connection must therefore guarantee the tightness of the internal hydraulic chamber created by said assembly for this purpose.
  • This connection must furthermore ensure the establishment of an electrical connection between, on the one hand, the connection terminals of the connector to an electronic control unit and, on the other hand, the solenoid of the electromagnet driving the injector.
  • the object of the present invention is to provide a device for connecting the connector to the body of the electromagnet automatically performing the electrical connection of the connector and the solenoid during their mechanical connection.
  • the two electrical terminals of the connector are each provided with a pin provided so that during assembly of the connector to the body, each pin cooperates with guide means in contact with an end portion of the connector.
  • solenoid wire the assembly operation leading to tearing the insulator at at least one location of said end portion to establish an electrical connection between each terminal and the solenoid.
  • the configuration is provided such that during assembly, the respective paths of each pin and the end portions of the wire interfere. Their relative positioning must therefore be fairly precise, because the interaction must be controlled so that only the insulation is removed to ensure the contact between the terminal and the wire.
  • the mechanical configuration the different components must actually initiate the meeting pins / ends of the solenoid, then guide them during their movement towards each other.
  • the carcass in which is wound the solenoid of the electromagnet comprises two protrusions forming a support for the ends of the wire and oriented along the axis of the assembly.
  • Each support further comprises means for guiding the pin in contact with at least one end portion of the solenoid wire.
  • the supports be sufficiently rigid to prevent the portions of thread involved from retracting, and on the other hand
  • the guide is precise enough to create sufficient contact force to pull the insulation.
  • each pin has a forked form with two branches of parallel shape oriented along the axis of the assembly.
  • These branches made of conductive metal, allow an elastic movement which improves the mechanical viability of the system (particularly by promoting their insertion into the guiding system). More precisely; each branch can for example take the form of a half-arrow whose section decreases towards its free end, the branches of the fork being preferably symmetrical with respect to a median longitudinal axis.
  • the support comprises meanwhile, a central mast in the vicinity of the free end of which the solenoid wire is wound into several contiguous turns.
  • the central mast is then flanked by two lateral wings in which is formed a guide groove of the branches of the fork. It should be noted that the free end of the mast may be bifurcated.
  • the guide grooves accommodate the branches so that they remain in contact with a non-negligible friction allowing the removal of the insulation, the turns of the wire during their sliding in said grooves.
  • each support and each pin are preferably oriented parallel to the axis of the solenoid.
  • the inverse paths of the supports and terminals are in this case parallel to the general axis of the injector.
  • the solenoid is wound in a carcass disposed coaxially with the body of the injector.
  • the protrusions forming support exceed the carcass and can be made in one piece with it.
  • the connector and the body surrounding the electromagnet are provided with a coding system allowing angular positioning and locking of one with respect to the other ensuring the matching during transmission. assembly of each pin with a support and the wire attached thereto.
  • said coding system consists of a projection protruding from the connector, oriented parallel to the axis of the assembly, and provided to cooperate with a notch formed in a pole piece of the electromagnet surrounding the solenoid.
  • the connector (1) of the injector is fixed to the body (2) of the electromagnet, their assembly constituting the upper part of the injector.
  • the connector (1) is provided with an electrical connection output (3) for connecting the injector with a control unit that electronically controls the injector.
  • the connector (1) has terminals (4) provided to cooperate with an external connector (not shown) placed at the end of the control bus from said unit.
  • the excess fuel is returned to the injector via a chamber (9) and the hydraulic drain duct (5).
  • the body (2) surrounds a solenoid (6) wound around a carcass (7) and surrounded by a pole piece (8) of molded steel, these elements constituting the electromagnet of the injector.
  • the solenoid (6) is coaxial with the hydraulic drain (5).
  • the hydraulic chamber (9) notably allows the assembly of the pilot valve (not shown) of the injector during the mounting of it.
  • a nut (10) surrounds the body (2), allowing attachment of the connector / electromagnet assembly to the rest of the injector.
  • FIG 1 shows in fact the main components of the upper part of an injector, without going into the details of the electrical connection which are the main object of the present invention.
  • the cut is made at the level of an electrical connection and, in figure 3 , a deliberately truncated portion of the perspective reveals, on the edge of the inner cavities (5, 9), on the one hand a support (11) around which is wound the end of the wire (12) of the solenoid (6), and on the other hand branches (13a, 13b) integral with the connector (1) and electrically connected to the terminals (4), constituting a fork pin (15) (the connecting fork (15) is in this case a single piece with the terminal (4)).
  • the same support pair (11) / branches (13a, 13b) exists and appears (see figure 3 ) at a location diametrically opposite the periphery of the assembly. These elements are arranged substantially along the same axis, parallel in fact to the axis of the assembly, and they are designed to meet during the nesting operation by which the assembly takes place. This is shown in figure 4 , which represents an intermediate step preceding the end of the assembly. In this step, the branches (13a, 13b) of the fork (15) are already in contact with the turns of the wire (12) and the support (11). The latter has grooves (14) side to partially accommodate and therefore guide the branches (13a, 13b) of the spindle (15).
  • the assembly is now finished, and the turns of the wire (12) and the branches (13a, 13b) are in their final relative position, namely the turns positioned substantially at the base of the fork (15).
  • the lateral tips of the half-arrows are in contact with the outer edges of the grooves (14), and the legs (13a, 13b) are thus perfectly maintained in pressure contact on the different turns of the wire (12).
  • a polarizer (16) protruding from the connector (1) is provided to fit into a corresponding notch (17) of the pole piece (8) (see figure 1 ).
  • This system makes it possible to ensure coaxiality between the branches (13a, 13b) of the pin (15) on the one hand, and the support (11) and its wire (12) on the other hand. It also prevents rotation between the connector (1) and the carcass subassembly (7) / pole piece (8).
  • this configuration has the advantage of limiting the mechanical stresses on the link branches (13a, 13b) / wire (12) of copper during a screwing phase of the connector assembly (1) / body of the solenoid (2). ) on the main body of the injector (not shown).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electromagnets (AREA)

Abstract

The invention concerns a device for connecting a mechanical, hydraulic and electric connector (1) equipping a heat engine fuel injector to the electromagnet driving the injector, said connector (1) being fixed to a body (2) enclosing the electromagnet and comprising two electric terminals (4) connected to the solenoid (S) of the electromagnet. Said electric terminals (4) are provided each with a pin (15) designed so that when the connector (1) is assembled to the body (2), each pin (15) co-operates with guide means (11, 14) contacting an end portion of the wire (12) of the solenoid (6), the assembling operation resulting in pulling off the insulation in at least one location of said end portion to set up an electrical connection between each terminal (4) and the solenoid (6).

Description

La présente invention a trait à un dispositif de raccordement d'un connecteur mécanique, hydraulique et électrique équipant un injecteur de carburant de moteur thermique à l'électroaimant de l'injecteur. Ce connecteur est en fait prévu pour être fixé au corps entourant ledit électroaimant.The present invention relates to a device for connecting a mechanical, hydraulic and electrical connector equipping a fuel injector of the engine with the electromagnet of the injector. This connector is in fact intended to be fixed to the body surrounding said electromagnet.

La triple fonction du connecteur lui impose un mode de fixation au dit corps qui respecte les contraintes et caractéristiques liées à chacune des fonctions et leur permet de cohabiter. Ainsi, la partie supérieure de l'injecteur que constitue leur assemblage doit permettre une mise en retour hydraulique du fluide de pilotage de l'injecteur. La connexion mécanique doit dès lors garantir l'étanchéité de la chambre hydraulique interne créée par ledit assemblage à cet effet. Cette connexion doit de surcroît assurer l'établissement d'une liaison électrique entre d'une part les bornes de raccordement du connecteur à une unité électronique de commande et d'autre part le solénoïde de l'électroaimant pilotant l'injecteur.The triple function of the connector imposes a mode of attachment to said body that respects the constraints and characteristics associated with each of the functions and allows them to coexist. Thus, the upper part of the injector that constitutes their assembly must allow a hydraulic return of the piloting fluid of the injector. The mechanical connection must therefore guarantee the tightness of the internal hydraulic chamber created by said assembly for this purpose. This connection must furthermore ensure the establishment of an electrical connection between, on the one hand, the connection terminals of the connector to an electronic control unit and, on the other hand, the solenoid of the electromagnet driving the injector.

Pour réaliser cette liaison électrique, dans les injecteurs actuels, une soudure de contact est effectuée entre des broches rigides équipant les extrémités du fil du solénoïde et lesdites bornes du connecteur. Ces broches dépassent de la carcasse de la bobine en direction des bornes du connecteur, dont les extrémités internes sont elles-mêmes orientées en direction des broches. L'opération de soudage complique cependant manifestement l'assemblage de la partie haute de l'injecteur, avec une incidence économique évidemment défavorable. US 6,299,079 B1 décrit une connection mécanique, hydraulique et électrique sans soudure.To achieve this electrical connection, in the current injectors, a contact weld is performed between rigid pins fitted to the ends of the solenoid wire and said terminals of the connector. These pins protrude from the coil casing towards the terminals of the connector, whose inner ends are themselves oriented towards the pins. The welding operation, however, obviously complicates the assembly of the upper part of the injector, with an economic impact obviously unfavorable. US 6,299,079 B1 describes a mechanical, hydraulic and electrical connection without welding.

Le but de la présente invention est de réaliser un dispositif de raccordement du connecteur au corps de l'électroaimant réalisant automatiquement la connexion électrique du connecteur et du solénoïde pendant leur connexion mécanique.The object of the present invention is to provide a device for connecting the connector to the body of the electromagnet automatically performing the electrical connection of the connector and the solenoid during their mechanical connection.

À cet effet, les deux bornes électriques du connecteur sont munies chacune d'une broche prévue pour qu'au cours de l'assemblage du connecteur au corps, chaque broche coopère avec des moyens de guidage au contact d'une portion d'extrémité du fil du solénoïde, l'opération d'assemblage conduisant à arracher l'isolant en au moins un endroit de ladite portion d'extrémité en vue d'établir une connexion électrique entre chaque borne et le solénoïde.For this purpose, the two electrical terminals of the connector are each provided with a pin provided so that during assembly of the connector to the body, each pin cooperates with guide means in contact with an end portion of the connector. solenoid wire, the assembly operation leading to tearing the insulator at at least one location of said end portion to establish an electrical connection between each terminal and the solenoid.

En d'autres termes, la configuration est prévue telle que pendant l'assemblage, les trajets respectifs de chaque broche et des portions d'extrémité du fil interfèrent. Leur positionnement relatif doit donc être assez précis, car l'interaction doit être maîtrisée de manière que seul l'isolant soit enlevé pour assurer la mise en contact de la borne et du fil. La configuration mécanique des différents composants doit en fait initier la rencontre broches / extrémités du solénoïde, puis les guider au cours de leur déplacement l'un vers l'autre.In other words, the configuration is provided such that during assembly, the respective paths of each pin and the end portions of the wire interfere. Their relative positioning must therefore be fairly precise, because the interaction must be controlled so that only the insulation is removed to ensure the contact between the terminal and the wire. The mechanical configuration the different components must actually initiate the meeting pins / ends of the solenoid, then guide them during their movement towards each other.

Le fait d'enlever l'isolant pendant l'opération de sertissage constitue un avantage déterminant de l'invention, notamment en termes de process industriel, puisque cela supprime la nécessité de réaliser la liaison électrique au préalable, et permet au contraire de réaliser concomitamment les connexions mécanique et électrique.The fact of removing the insulator during the crimping operation is a decisive advantage of the invention, particularly in terms of industrial process, since it eliminates the need to make the electrical connection beforehand, and allows on the contrary to achieve concomitantly mechanical and electrical connections.

Selon l'invention, la carcasse dans laquelle est bobiné le solénoïde de l'électroaimant comporte deux excroissances formant support pour les extrémités du fil et orientées selon l'axe de l'assemblage.According to the invention, the carcass in which is wound the solenoid of the electromagnet comprises two protrusions forming a support for the ends of the wire and oriented along the axis of the assembly.

Chaque support comporte de plus des moyens de guidage de la broche au contact d'au moins une portion d'extrémité du fil du solénoïde.Each support further comprises means for guiding the pin in contact with at least one end portion of the solenoid wire.

Pour que l'objectif d'enlèvement d'isolant à certains endroits sur le fil puisse être tenu, il convient d'une part que les supports soient suffisamment rigides pour empêcher que les portions de fil impliquées ne s'escamotent, et d'autre part que le guidage soit suffisamment précis pour créer une force de contact suffisante pour arracher l'isolant.In order for the objective of insulating removal in certain places on the wire to be held, it is necessary, on the one hand, that the supports be sufficiently rigid to prevent the portions of thread involved from retracting, and on the other hand The guide is precise enough to create sufficient contact force to pull the insulation.

Selon une configuration possible, chaque broche présente une forme en fourche à deux branches d'allure parallèle orientées selon l'axe de l'assemblage. Ces branches, en métal conducteur, permettent un débattement élastique qui améliore la viabilité mécanique du système (notamment en favorisant leur insertion dans le système de guidage). Plus précisément; chaque branche peut par exemple prendre la forme d'une demi-flèche dont la section diminue vers son extrémité libre, les branches de la fourche étant de préférence symétriques par rapport à un axe longitudinal médian.According to one possible configuration, each pin has a forked form with two branches of parallel shape oriented along the axis of the assembly. These branches, made of conductive metal, allow an elastic movement which improves the mechanical viability of the system (particularly by promoting their insertion into the guiding system). More precisely; each branch can for example take the form of a half-arrow whose section decreases towards its free end, the branches of the fork being preferably symmetrical with respect to a median longitudinal axis.

Le support comporte quant à lui,un mât central au voisinage de l'extrémité libre duquel le fil du solénoïde est enroulé en plusieurs spires jointives.The support comprises meanwhile, a central mast in the vicinity of the free end of which the solenoid wire is wound into several contiguous turns.

L'emploi de plusieurs spires jointives permet de garantir l'établissement de la connexion électrique, en multipliant les points de contact potentiel avec la borne du connecteur. L'utilisation d'une broche à deux branches double encore le nombre de points de contact possibles. Les deux branches de la fourche sont prévues pour s'enficher de part et d'autre du mât central.The use of several contiguous turns makes it possible to guarantee the establishment of the electrical connection, multiplying the potential points of contact with the terminal of the connector. The use of a two-prong pin doubles the number of possible points of contact. The two branches of the fork are intended to plug on both sides of the central mast.

Selon une configuration possible, le mât central est alors flanqué de deux ailes latérales dans lesquelles est pratiquée une rainure de guidage des branches de la fourche. Il est à noter que l'extrémité libre du mât peut être bifide.In a possible configuration, the central mast is then flanked by two lateral wings in which is formed a guide groove of the branches of the fork. It should be noted that the free end of the mast may be bifurcated.

Les rainures de guidage logent les branches de manière à ce qu'elles restent au contact, avec un frottement non négligeable permettant l'enlèvement de l'isolant, des spires du fil au cours de leur coulissement dans lesdites rainures.The guide grooves accommodate the branches so that they remain in contact with a non-negligible friction allowing the removal of the insulation, the turns of the wire during their sliding in said grooves.

Selon l'invention, chaque support et chaque broche sont de préférence orientés parallèlement à l'axe du solénoïde. Ainsi, les trajets inverses des supports et des bornes sont en l'espèce parallèles à l'axe général de l'injecteur.According to the invention, each support and each pin are preferably oriented parallel to the axis of the solenoid. Thus, the inverse paths of the supports and terminals are in this case parallel to the general axis of the injector.

Le solénoïde est bobiné dans une carcasse disposée coaxialement au corps de l'injecteur. Selon l'invention, les excroissances formant support dépassent de la carcasse et peuvent être fabriquées d'une seule pièce avec elle.The solenoid is wound in a carcass disposed coaxially with the body of the injector. According to the invention, the protrusions forming support exceed the carcass and can be made in one piece with it.

La nécessité d'un positionnement angulaire relatif précis entre les supports, d'une part, et les bornes, d'autre part, a été évoquée auparavant. Ainsi, selon l'invention, le connecteur et le corps entourant l'électroaimant sont dotés d'un système de détrompage permettant un positionnement et un blocage angulaires de l'un par rapport à l'autre assurant la mise en correspondance au cours de l'assemblage de chaque broche avec un support et le fil qui y est fixé.The need for precise relative angular positioning between the supports, on the one hand, and the terminals, on the other hand, has been mentioned before. Thus, according to the invention, the connector and the body surrounding the electromagnet are provided with a coding system allowing angular positioning and locking of one with respect to the other ensuring the matching during transmission. assembly of each pin with a support and the wire attached thereto.

De préférence, ledit système de détrompage consiste en une protubérance dépassant du connecteur, orientée parallèlement à l'axe de l'assemblage, et prévue pour coopérer avec une encoche pratiquée dans une pièce polaire de l'électroaimant entourant le solénoïde.Preferably, said coding system consists of a projection protruding from the connector, oriented parallel to the axis of the assembly, and provided to cooperate with a notch formed in a pole piece of the electromagnet surrounding the solenoid.

L'invention va à présent être décrite plus en détail, en référence aux figures annexées, pour lesquelles :

  • les figures 1 et 2 montrent des vues en coupe de l'ensemble constitué par le connecteur et le corps de l'éléctroaimant ;
  • les figures 3 et 4 sont des vues en perspective de ces deux éléments en cours d'assemblage, montrant deux phases distinctes de l'établissement de la connexion électrique ; et
  • la figure 5 représente un agrandissement des perspectives précédentes, lorsque l'assemblage est achevé.
The invention will now be described in more detail, with reference to the appended figures, for which:
  • the figures 1 and 2 show sectional views of the assembly formed by the connector and the body of the electromagnet;
  • the figures 3 and 4 are perspective views of these two elements being assembled, showing two distinct phases of the establishment of the electrical connection; and
  • the figure 5 represents an enlargement of the previous perspectives, when the assembly is completed.

En référence à la figure 1, le connecteur (1) de l'injecteur est fixé au corps (2) de l'électroaimant, leur assemblage constituant la partie supérieure de l'injecteur. Le connecteur (1) est doté d'une sortie (3) de raccordement électrique permettant la liaison de l'injecteur avec une unité de commande contrôlant électroniquement l'injecteur. Le connecteur (1) comporte des bornes (4) prévues pour coopérer avec un connecteur externe (non représenté) placé à l'extrémité du bus de commande issu de ladite unité. Le retour du carburant en excès dans l'injecteur se fait par une chambre (9) et le conduit (5) formant drain hydraulique. Le corps (2) entoure par ailleurs un solénoïde (6) bobiné autour d'une carcasse (7) et entouré d'une pièce polaire (8) en acier moulé, ces éléments constituant l'électroaimant de l'injecteur. Le solénoïde (6) est coaxial au drain hydraulique (5). La chambre hydraulique (9) permet notamment l'assemblage du clapet de pilotage (non représenté) de l'injecteur au cours du montage de celui-ci. Un écrou (10) entoure le corps (2), permettant la fixation de l'ensemble connecteur / électroaimants au reste de l'injecteur.With reference to the figure 1 , the connector (1) of the injector is fixed to the body (2) of the electromagnet, their assembly constituting the upper part of the injector. The connector (1) is provided with an electrical connection output (3) for connecting the injector with a control unit that electronically controls the injector. The connector (1) has terminals (4) provided to cooperate with an external connector (not shown) placed at the end of the control bus from said unit. The excess fuel is returned to the injector via a chamber (9) and the hydraulic drain duct (5). The body (2) surrounds a solenoid (6) wound around a carcass (7) and surrounded by a pole piece (8) of molded steel, these elements constituting the electromagnet of the injector. The solenoid (6) is coaxial with the hydraulic drain (5). The hydraulic chamber (9) notably allows the assembly of the pilot valve (not shown) of the injector during the mounting of it. A nut (10) surrounds the body (2), allowing attachment of the connector / electromagnet assembly to the rest of the injector.

La vue de la figure 1 montre en fait les composants principaux de la partie supérieure d'un injecteur, sans entrer dans les détails de la connexion électrique qui font l'objet essentiel de la présente invention. Ceux-ci apparaissent plus précisément dans les figures suivantes. Ainsi, en figure 2, la coupe est effectuée au niveau d'une connexion électrique et, en figure 3, une partie volontairement tronquée de la perspective laisse apparaître, en bordure des cavités intérieures (5, 9), d'une part un support (11) autour duquel est enroulée l'extrémité du fil (12) du solénoïde (6), et d'autre part des branches (13a, 13b) solidaires du connecteur (1) et électriquement reliées aux bornes (4), constituant une broche en fourche (15) (la fourche de connexion (15) est en l'espèce d'une seule pièce avec la borne (4)).The view of the figure 1 shows in fact the main components of the upper part of an injector, without going into the details of the electrical connection which are the main object of the present invention. These appear more precisely in the following figures. So, in figure 2 , the cut is made at the level of an electrical connection and, in figure 3 , a deliberately truncated portion of the perspective reveals, on the edge of the inner cavities (5, 9), on the one hand a support (11) around which is wound the end of the wire (12) of the solenoid (6), and on the other hand branches (13a, 13b) integral with the connector (1) and electrically connected to the terminals (4), constituting a fork pin (15) (the connecting fork (15) is in this case a single piece with the terminal (4)).

Le même couple support (11) / branches (13a, 13b) existe et apparaît (voir figure 3) à un emplacement diamétralement opposé de la périphérie de l'assemblage. Ces éléments sont disposés sensiblement selon le même axe, parallèles en fait à l'axe de l'assemblage, et ils sont conçus pour se rencontrer au cours de l'opération d'emboîtement par laquelle l'assemblage s'effectue. C'est ce qui est montré en figure 4, qui représente une étape intermédiaire précédant la fin de l'assemblage. Dans cette étape, les branches (13a, 13b) de la fourche (15) sont déjà au contact des spires du fil (12) et du support (11). Ce dernier comporte des rainures (14) latérales permettant de loger partiellement et par conséquent de guider les branches (13a, 13b) de la broche (15). Celles-ci présentent à leur extrémité une forme de demi-flèche qui participe à la fonction de connexion électromécanique en facilitant l'introduction des branches (13a, 13b) dans les rainures (14). Les largeurs respectives des rainures (14) et des branches (13a, 13b) permettent d'assurer le serrage desdites branches (13a, 13b) au contact des spires (12) de façon à ce que le frottement soit suffisant pour arracher l'isolant.The same support pair (11) / branches (13a, 13b) exists and appears (see figure 3 ) at a location diametrically opposite the periphery of the assembly. These elements are arranged substantially along the same axis, parallel in fact to the axis of the assembly, and they are designed to meet during the nesting operation by which the assembly takes place. This is shown in figure 4 , which represents an intermediate step preceding the end of the assembly. In this step, the branches (13a, 13b) of the fork (15) are already in contact with the turns of the wire (12) and the support (11). The latter has grooves (14) side to partially accommodate and therefore guide the branches (13a, 13b) of the spindle (15). These have at their end a half-arrow shape which participates in the electromechanical connection function by facilitating the introduction of the branches (13a, 13b) in the grooves (14). The respective widths of the grooves (14) and of the branches (13a, 13b) make it possible to ensure the tightening of said branches (13a, 13b) in contact with the turns (12) so that the friction is sufficient to tear off the insulation .

L'élasticité permise par la forme et la matière de la fourche (15) et ses deux branches (13a, 13b) trouve son intérêt en particulier dans cette étape. Pour éviter que les fils ne soient purement et simplement décrochés par des branches (13a et 13b) mal dimensionnées arrivant en sens inverse, il est nécessaire de prévoir des tolérances dimensionnelles larges, éventuellement rattrapées au cours de la connexion parce que les éléments en interaction peuvent se déformer légèrement.The elasticity permitted by the shape and the material of the fork (15) and its two branches (13a, 13b) is of particular interest in this step. To avoid that the son are purely and simply unhooked by branches (13a and 13b) poorly sized arriving in the opposite direction, it is necessary to provide wide dimensional tolerances, possibly caught during the connection because the interacting elements can deform slightly.

Au fur et à mesure de l'introduction, les branches (13a et 13b) sont ramenées en direction des spires du fil (12), du fait de l'entrée en contact de la pointe latérale de chaque demi-flèche avec la bordure externe de la rainure (14). Le frottement s'accentue, et devient suffisant pour arracher l'isolant La connexion électrique peut s'établir.As and when the introduction, the branches (13a and 13b) are brought towards the turns of the wire (12), due to the contact of the lateral tip of each half-arrow with the outer rim the groove (14). The friction increases, and becomes sufficient to tear the insulation The electrical connection can be established.

En référence à la figure 5, l'assemblage est à présent fini, et les spires du fil (12) et les branches (13a, 13b) se trouvent dans leur position relative définitive, à savoir les spires positionnées pratiquement à la base de la fourche (15). Dans cette position, comme indiqué ci-dessus, les pointes latérales des demi-flèches sont au contact des bordures externes des rainures (14), et les branches (13a, 13b) sont donc parfaitement maintenues en contact sous pression sur les différentes spires du fil (12).With reference to the figure 5 , the assembly is now finished, and the turns of the wire (12) and the branches (13a, 13b) are in their final relative position, namely the turns positioned substantially at the base of the fork (15). In this position, as indicated above, the lateral tips of the half-arrows are in contact with the outer edges of the grooves (14), and the legs (13a, 13b) are thus perfectly maintained in pressure contact on the different turns of the wire (12).

Pour pouvoir garantir le positionnement correct du connecteur (1) par rapport au corps (2) en vue de permettre l'établissement de la liaison électrique, un détrompeur (16) (voir en figure 2) dépassant du connecteur (1) est prévu pour s'adapter dans une encoche (17) correspondante de la pièce polaire (8) (voir en figure 1). Ce système permet d'assurer la co-axialité entre les branches (13a, 13b) de la broche (15) d'une part, et le support (11) et son fil (12) d'autre part. Il permet également d'empêcher la rotation entre le connecteur (1) et le sous-ensemble carcasse (7) / pièce polaire (8). Enfin, cette configuration présente l'avantage de limiter les contraintes mécaniques sur la liaison branches (13a, 13b) / fil (12) de cuivre lors d'une phase de vissage de l'ensemble connecteur (1) / corps du solénoïde (2) sur le corps principal de l'injecteur (non représenté).In order to guarantee the correct positioning of the connector (1) with respect to the body (2) in order to allow the establishment of the electrical connection, a polarizer (16) (see FIG. figure 2 ) protruding from the connector (1) is provided to fit into a corresponding notch (17) of the pole piece (8) (see figure 1 ). This system makes it possible to ensure coaxiality between the branches (13a, 13b) of the pin (15) on the one hand, and the support (11) and its wire (12) on the other hand. It also prevents rotation between the connector (1) and the carcass subassembly (7) / pole piece (8). Finally, this configuration has the advantage of limiting the mechanical stresses on the link branches (13a, 13b) / wire (12) of copper during a screwing phase of the connector assembly (1) / body of the solenoid (2). ) on the main body of the injector (not shown).

Claims (12)

  1. Connection device for connecting a mechanical, hydraulic and electrical connector (1) with which a combustion engine fuel injector is equipped, to the electromagnet that drives the injector, said connector (1) being fixed to a body (2) surrounding the electromagnet and comprising two electric terminals (4) connected to the solenoid (6) of the electromagnet, characterized in that said electric terminals (4) are each equipped with a pin (15) designed such that, while the connector (1) is being assembled with the body (2), each pin (15) collaborates with guide means (11, 14) in contact with an end portion of the wire (12) of the solenoid (6), the assembly operation leading to the insulation being stripped away from at least one spot of said end portion with a view to establishing an electrical connection between each terminal (4) and the solenoid (6).
  2. Connection device according to the preceding claim, characterized in that the field frame (7) in which the solenoid (6) of the electromagnet is wound comprises two protrusions acting as supports (11) for the ends of the wire (12) and directed along the axis of assembly.
  3. Connection device according to the preceding claim, characterized in that each support (11) comprises guide means (14) for guiding the pin (15) into contact with at least one end portion of the wire (12) of the solenoid (6).
  4. Connection device according to any one of the preceding claims, characterized in that the pin (15) is in the form of a fork with two prongs (13a, 13b) of parallel appearance directed along the axis of assembly.
  5. Connection device according to the preceding claim, characterized in that each prong (13a, 13b) adopts the shape of half an arrowhead the cross section of which decreases toward its free end, the prongs (13a, 13b) of the fork (15) being symmetric with respect to their median longitudinal axis.
  6. Connection device according to either of Claims 4 and 5, characterized in that the support (11) comprises a central post near the free end of which the wire of the solenoid (6) is fixed, forming several contiguous turns around it.
  7. Connection device according to the preceding claim, characterized in that the free end of the post is cleft.
  8. Connection device according to either of Claims 6 and 7, characterized in that the central post is flanked by two lateral flanges in which a slot (14) is formed to guide the prongs (13a, 13b) of the fork (15).
  9. Connection device according to any one of Claims 2 to 8, characterized in that each support (11) and each pin (15) are directed parallel to the axis of the solenoid (6).
  10. Connection device according to any one of Claims 2 to 9, characterized in that the support-forming protrusion or protrusions (11) extending from the field frame (7) in which the solenoid (6) is wound is/are formed as one with this field frame.
  11. Connection device according to any one of the preceding claims, characterized in that the connector (1) and the body (2) surrounding the electromagnet are provided with a polarizing system to allow the one to be angularly positioned and immobilized with respect to the other so that each pin (15) can be brought into register with a support (11) and the wire (12) which is fixed thereto during assembly.
  12. Connection device according to the preceding claim, characterized in that said polarizing system consists in a projection (16) extending beyond the connector (1), directed parallel to the axis of assembly and designed to collaborate with a cutout (17) made in a pole piece (8) of the electromagnet surrounding the solenoid (6).
EP06808133A 2005-09-15 2006-09-14 Device for connecting a connector to a solenoid driving an injector Ceased EP1934466B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0509433A FR2890793B1 (en) 2005-09-15 2005-09-15 DEVICE FOR CONNECTING A CONNECTOR TO A SOLENOID FOR CONTROLLING AN INJECTOR
PCT/FR2006/002108 WO2007031652A1 (en) 2005-09-15 2006-09-14 Device for connecting a connector to a solenoid driving an injector

Publications (2)

Publication Number Publication Date
EP1934466A1 EP1934466A1 (en) 2008-06-25
EP1934466B1 true EP1934466B1 (en) 2011-03-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06808133A Ceased EP1934466B1 (en) 2005-09-15 2006-09-14 Device for connecting a connector to a solenoid driving an injector

Country Status (6)

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US (1) US7744401B2 (en)
EP (1) EP1934466B1 (en)
AT (1) ATE503107T1 (en)
DE (1) DE602006020894D1 (en)
FR (1) FR2890793B1 (en)
WO (1) WO2007031652A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8997717B2 (en) * 2010-03-25 2015-04-07 Denso International America, Inc. Integrated fuel injector orientation and retention device
DE102015222190B4 (en) * 2015-11-11 2019-03-28 Itt Manufacturing Enterprises Llc Connector and motor or valve cover member comprising a connector

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3046890A1 (en) * 1980-12-12 1982-07-15 Robert Bosch Gmbh, 7000 Stuttgart ELECTROMAGNETICALLY ACTUABLE VALVE, ESPECIALLY FUEL INJECTION VALVE FOR FUEL INJECTION SYSTEMS
JP2584276B2 (en) * 1988-03-30 1997-02-26 株式会社ユニシアジェックス Electromagnetic fuel injection valve
DE4002393A1 (en) * 1990-01-27 1991-08-01 Bosch Gmbh Robert FUEL INJECTION SYSTEM FOR INTERNAL COMBUSTION ENGINES
US6299079B1 (en) * 1998-06-18 2001-10-09 Robert Bosch Gmbh Fuel injector
JP3973769B2 (en) * 1998-08-19 2007-09-12 富士通株式会社 Method and apparatus for wavelength conversion
US6564775B1 (en) * 1999-08-03 2003-05-20 Aisan Kogyo Kabushiki Kaisha Fuel delivery pipes
JP3404528B2 (en) * 2000-06-23 2003-05-12 独立行政法人通信総合研究所 Optical frequency converter using multiplication modulation
JP2002072269A (en) * 2000-08-30 2002-03-12 Inst Of Physical & Chemical Res Method and device for generating terahertz wave
DE10119939A1 (en) * 2001-04-23 2002-10-24 Mannesmann Rexroth Ag Magnet coil arrangement e.g. for hydraulic valve, has sealing element between connector and tubular metal part
US6688578B1 (en) * 2003-01-08 2004-02-10 Robert Bosch Gmbh Electromagnetic actuator for a fuel injector having an integral magnetic core and injector valve body
JPWO2005098530A1 (en) * 2004-03-31 2008-02-28 住友大阪セメント株式会社 THz wave generator
US7182603B1 (en) * 2005-12-20 2007-02-27 Ford Global Technologies, Llc Electronic valve actuator electrical connector

Also Published As

Publication number Publication date
US7744401B2 (en) 2010-06-29
WO2007031652A1 (en) 2007-03-22
US20090156063A1 (en) 2009-06-18
ATE503107T1 (en) 2011-04-15
FR2890793A1 (en) 2007-03-16
FR2890793B1 (en) 2007-12-07
EP1934466A1 (en) 2008-06-25
DE602006020894D1 (en) 2011-05-05

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