EP0475829A1 - Device for feeding fuel to and holding several fuel injectors for an internal combustion engine - Google Patents

Device for feeding fuel to and holding several fuel injectors for an internal combustion engine Download PDF

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Publication number
EP0475829A1
EP0475829A1 EP91402392A EP91402392A EP0475829A1 EP 0475829 A1 EP0475829 A1 EP 0475829A1 EP 91402392 A EP91402392 A EP 91402392A EP 91402392 A EP91402392 A EP 91402392A EP 0475829 A1 EP0475829 A1 EP 0475829A1
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EP
European Patent Office
Prior art keywords
plate
injectors
housings
screw
intake duct
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.)
Withdrawn
Application number
EP91402392A
Other languages
German (de)
French (fr)
Inventor
Dominique Desportes
Jean-Claude Gallot
Jean Pierre Breton
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
Renault SAS
Regie Nationale des Usines Renault
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR9011274A external-priority patent/FR2666626B1/en
Priority claimed from FR9103455A external-priority patent/FR2674292B1/en
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA, Renault SAS, Regie Nationale des Usines Renault filed Critical Automobiles Peugeot SA
Publication of EP0475829A1 publication Critical patent/EP0475829A1/en
Withdrawn legal-status Critical Current

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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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails

Definitions

  • the fuel supply to the injectors is ensured in a large number of cases, by a supply line connected to the upper end of the injector.
  • the latter is connected by its lower part, to the intake duct of a cylinder of the engine.
  • the need to arrange the supply line, also called a ramp, above the injection assembly makes this mode of supplying the injectors particularly bulky.
  • this fuel may diffuse inside the walls of the supply duct integrated into the intake manifold, if the latter is produced in a porous material. This is the case, for example, for aluminum collectors made in foundry, because of the porosities introduced into the material by this manufacturing process.
  • the present invention solves these problems by proposing a device for holding and supplying several fuel injectors for an internal combustion engine, independent of the intake manifold, and whose size is particularly reduced.
  • the subject of the present invention is a device for supplying and holding several fuel injectors for an internal combustion engine, these injectors being fed laterally by a supply duct, and being housed and centered respectively in several housings formed with said supply duct, and the lower part of which is tightly connected to an opening of the fuel intake duct in an engine cylinder, the aforementioned supply duct and its associated housings being made of a non-porous material, this device being characterized in that the housings are interconnected by a reinforcing plate and in that the injectors are held in position in the housings by means of a plate fixed to the reinforcing platen by means of a screw.
  • the lower part of the wall of the housings comprises a plate ensuring the fixing of the device on the intake duct or near this intake duct of the cylinder.
  • a flat seal is interposed between the lower part of the wall of at least one housing and the edge of the corresponding opening of the intake duct.
  • the seal between the lower part of the wall of at least one housing and the edge of the corresponding opening of the intake duct is produced by means of an O-ring.
  • a flat seal is interposed between the bottom wall of the plate at least one housing and the edge of the corresponding opening of the intake duct.
  • the aforementioned screw enters an opening formed in the plate by its side facing the motor and is screwed into a nut integral with said plate so that the unscrewing the screw prior to disassembly of an injector, made impossible from the top of the engine M, requires disassembly of the bar.
  • the aforementioned nut is welded to the plate.
  • a fabric is arranged opposite the head of the screw when the bar is in the service position.
  • This fabric came in shape with the wall of the intake manifold. This increases the efficiency of the safety device by adding an additional barrier to access to the screw head.
  • all the injectors are connected by a single plate, the plate being formed by an extension of the wall of the housings.
  • FIG. 1 one sees one of the fuel injectors 2 of the injection system of an engine, introduced and centered in one of the housings 10 formed at the same time as a lateral supply duct 1 for the injectors 2
  • This housing 10 has a shape substantially corresponding to that of the injector 2, and its upper part has an annular recess 100 intended to receive an upper part of corresponding shape from the injector 2 so as to ensure its positioning in said housing 10 (figure 5).
  • This supply duct 1 and its associated housings 10 are made of a non-porous material having satisfactory fuel sealing characteristics.
  • the lower part of the housing 10 is introduced and centered in an opening 30 of the intake duct 3 of an engine cylinder, through which the fuel is injected.
  • Two fuel seals 4 are interposed respectively between the upper 21 and lower 22 parts of the injectors 2, and the wall 11, 12 of the housings 10 opposite these parts 21, 22, so that the part of the injector 2 located between these two seals 4 is embedded in the fuel.
  • a seal 8 is interposed between the end walls of the lower part 13 of the housing 10 and the walls delimiting a recess 17 formed in the edge of the opening 30 of the intake duct 3.
  • the supply and maintenance device comprises three housings 10 intended to each receive an injector 2, connected together by a reinforcing plate 18.
  • Each injector 2 is held in position in its housing 10 by means of a plate 5 covering the injector 2, in which an opening has been provided allowing the passage of the upper part 24 of the injector 2.
  • the aforementioned plate 5 is supported by its face lower on the upper edge of the housings 10, and is fixed to the reinforcing plate 18 by means of a fixing screw 101.
  • the device according to the invention is fixed to the intake duct 3 by means of a plate 14, formed at the base of the housings 10, and in which an opening 14a has been formed. for the passage of a fixing screw intended to be screwed onto the intake duct 3 of the cylinder.
  • a fixing screw intended to be screwed onto the intake duct 3 of the cylinder.
  • the plate 18 To allow this screwing in the case of the middle housing 10, there is provided, in the plate 18, a cutout 18a, in line with the opening 14a made in the plate 14 secured to this housing. It should be noted that provision may also be made for fixing the plate 14 in the vicinity of said intake duct 3.
  • the seal can be obtained by interposing a flat seal 6 between the lower end wall of the housing 10 and the walls defining a recess 15 formed in the upper edge of the corresponding opening 30 of the conduit d admission 3.
  • This sealing can also be obtained by means of an O-ring 7 interposed between the walls delimiting a recess 16 formed in the lower and lateral part of the wall of the housing 10 and the surfaces delimiting the corresponding opening 30 of the intake duct 3 opposite these walls.
  • the seal can be achieved by a flat seal 8 interposed between the lower wall 140 of the aforementioned plate 14, and the walls defining a recess 17 formed in the upper edge of the corresponding opening 30 of the aforementioned conduit 3.
  • the gasket also serves as thermal insulation and reduces the value of the temperature in the vicinity of the end of the injector introduced into the opening of the intake duct.
  • the injectors 2 are positioned, centered and maintained in the housings 10 of the supply duct 1, the latter directing the fuel around the side walls of the injectors 2 without causing fuel to leak out of said duct 1.
  • All of the supply duct and its associated housings (bar) can be made of any material having sufficient fuel tightness: aluminum material, ferrous material in mechanical welding, plastic injected under pressure, etc.
  • This assembly also has the advantage of being autonomous, in the sense that it allows the installation of the injectors outside the engine assembly line. This will verify the tightness of the device, on a specific station, before mounting. This will result in a qualitative improvement in production.
  • the devices for supplying and holding several injectors according to the invention, or bars, can be adapted to each type of injector without it being necessary to modify the structure of the intake manifold.
  • the device for holding and supplying several fuel injectors mainly comprises a supply duct (or ramp) 1, comprising a plurality of housings 10 which are shaped with said supply duct 1 and intended to house each an injector 2.
  • the holding in position of each injector is ensured by on the one hand, a shoulder formed at the upper part of the injector 2, supported by its lower surface, on a horizontal surface of a recess 100 of corresponding shape provided at the upper part of the wall of the housing 10, and on the other hand a plate 5 come in shape with the supply duct 1, crossed by the upper part of the injectors 2 and on which is fixed a plate reinforcement 18, by means of assembly screws 101.
  • the aforementioned assembly is carried out by means of a screw 101 and a nut 102 secured to the aforementioned plate 18, the head 103 of the screw 101 being oriented on the side of the motor (not shown in this figure but visible in Figure 3), and therefore made inaccessible from the top of this engine.
  • the above-mentioned nut 102 is welded to the upper part of the plate 18.
  • FIGS. 9 and 10 show two strips of injectors fixed to an intake manifold 9 in the vicinity of the intake conduits 3 of the cylinders in an internal combustion engine M.
  • the intake manifold 9 has a projecting part 90 or fabric under the head 103 of the screw 101 for assembling the plate 5 on the plate 18, intended to increase the inaccessibility of the head 103 of the screw 101 when the bar is in place.
  • a device for lateral supply and holding of several injectors has been produced, compact, independent of the intake manifold, and which makes it possible to avoid the drawbacks linked to the obligation to produce a duct for power integrated into the intake manifold, this device can be adapted to each type of injector.
  • the bar is made non-removable when the support is fixed to the engine.
  • assembly screw could be replaced for example by a threaded rod and two nuts, one of which would be formed by the plate.

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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)

Abstract

The device comprises a feedpipe (1) feeding the injectors (2) via their lateral walls, these injectors (2) being respectively centred in several housings (10) which are made in one piece with the said feedpipe (1) and being held in position in a housing (10) by virtue of a plate (18) fixed to a plate-like element (5) by means of at least one screw (101). This screw (101) penetrates into an opening made in the plate-like element (5) through its side which is facing the engine, which screw is screwed into a nut (102) which is solidly attached to the said plate (18), so that unscrewing of the screw prior to dismounting the injectors requires dismounting of the bar B. <IMAGE>

Description

La présente invention concerne un dispositif d'alimentation et de maintien de plusieurs injecteurs de carburant pour un moteur à combustion interne.The present invention relates to a device for supplying and holding several fuel injectors for an internal combustion engine.

L'alimentation en carburant des injecteurs est assurée dans un grand nombre de cas, par une conduite d'alimentation reliée à l'extrémité supérieure de l'injecteur. Ce dernier est relié par sa partie inférieure, au conduit d'admission d'un cylindre du moteur. Or, la nécessité d'aménager la conduite d'alimentation, appelée aussi rampe, au-dessus de l'ensemble d'injection, rend ce mode d'alimention des injecteurs particulièrement encombrant. Pour palier cet inconvénient, il a déjà été proposé d'alimenter les injecteurs par leurs parois latérales, en intégrant la conduite d'alimentation au collecteur d'admission.The fuel supply to the injectors is ensured in a large number of cases, by a supply line connected to the upper end of the injector. The latter is connected by its lower part, to the intake duct of a cylinder of the engine. However, the need to arrange the supply line, also called a ramp, above the injection assembly, makes this mode of supplying the injectors particularly bulky. To overcome this drawback, it has already been proposed to supply the injectors by their side walls, by integrating the supply line to the intake manifold.

Or, lorsque les parois latérales de l'injecteur sont noyées dans le carburant, il peut se produire une diffusion de ce carburant à l'intérieur des parois du conduit d'alimentation intégré au collecteur d'admission, si celui-ci est réalisé dans un matériau poreux. Ce qui est le cas, par exemple, pour les collecteurs en aluminium réalisés en fonderie, à cause des porosités introduites dans la matière par ce procédé de fabrication.However, when the side walls of the injector are embedded in the fuel, this fuel may diffuse inside the walls of the supply duct integrated into the intake manifold, if the latter is produced in a porous material. This is the case, for example, for aluminum collectors made in foundry, because of the porosities introduced into the material by this manufacturing process.

En outre, ce mode d'alimentation complique considérablement la conception de ce collecteur, qui doit être adapté à chaque type d'injecteur.In addition, this mode of supply considerably complicates the design of this manifold, which must be adapted to each type of injector.

La présente invention résout ces problèmes en proposant un dispositif de maintien et d'alimentation de plusieurs injecteurs de carburant pour un moteur à combustion interne, indépendant du collecteur d'admission, et dont l'encombrement est particulièrement réduit.The present invention solves these problems by proposing a device for holding and supplying several fuel injectors for an internal combustion engine, independent of the intake manifold, and whose size is particularly reduced.

A cet effet, la présente invention a pour objet un dispositif d'alimentation et de maintien de plusieurs injecteurs de carburant pour un moteur à combustion interne, ces injecteurs étant alimentés latéralement par un conduit d'alimentation, et étant logés et centrés respectivement dans plusieurs logements venus de forme avec ledit conduit d'alimentation, et dont la partie inférieure est reliée de façon étanche à une ouverture du conduit d'admission du carburant dans un cylindre du moteur, le conduit d'alimentation précité et ses logements associés étant réalisés en un matériau non poreux, ce dispositif étant caractérisé en ce que les logements sont reliés entre eux par une platine de renfort et en ce que les injecteurs sont maintenus en position dans les logements grâce à une plaque fixée sur la platine de renfort au moyen d'une vis.To this end, the subject of the present invention is a device for supplying and holding several fuel injectors for an internal combustion engine, these injectors being fed laterally by a supply duct, and being housed and centered respectively in several housings formed with said supply duct, and the lower part of which is tightly connected to an opening of the fuel intake duct in an engine cylinder, the aforementioned supply duct and its associated housings being made of a non-porous material, this device being characterized in that the housings are interconnected by a reinforcing plate and in that the injectors are held in position in the housings by means of a plate fixed to the reinforcing platen by means of a screw.

On précisera que la partie inférieure de la paroi des logements comporte une platine assurant la fixation du dispositif sur le conduit d'admission ou à proximité de ce conduit d'admission du cylindre.It should be noted that the lower part of the wall of the housings comprises a plate ensuring the fixing of the device on the intake duct or near this intake duct of the cylinder.

Suivant une autre caractéristique de l'invention, un joint d'étanchéité plat est interposé entre la partie inférieure de la paroi d'au moins un logement et le bord de l'ouverture correspondante du conduit d'admission.According to another characteristic of the invention, a flat seal is interposed between the lower part of the wall of at least one housing and the edge of the corresponding opening of the intake duct.

Suivant une variante de réalisation du montage étanche du conduit d'alimentation sur le conduit d'admission, l'étanchéité entre la partie inférieure de la paroi d'au moins un logement et le bord de l'ouverture correspondante du conduit d'admission est réalisée au moyen d'un joint torique.According to an alternative embodiment of the sealed assembly of the supply duct on the intake duct, the seal between the lower part of the wall of at least one housing and the edge of the corresponding opening of the intake duct is produced by means of an O-ring.

Suivant une autre variante, un joint d'étanchéité plat est interposé entre la paroi inférieure de la platine d'au moins un logement et le bord de l'ouverture correspondante du conduit d'admission.According to another variant, a flat seal is interposed between the bottom wall of the plate at least one housing and the edge of the corresponding opening of the intake duct.

Si le dispositif d'alimentation et de maintien précédemment défini est indépendant du collecteur d'admission et présente un encombrement réduit, il subsiste malgré tout un problème tenant principalement en ce que le démontage d'un injecteur par exemple défectueux, occasionne l'écoulement de l'essence contenue dans le logement correspondant et provenant du conduit d'alimentation proprement dit, en direction du cylindre via le conduit d'admission.If the supply and maintenance device defined above is independent of the intake manifold and has a reduced bulk, there is still a problem mainly due to the fact that the disassembly of an injector, for example defective, causes the flow of the petrol contained in the corresponding housing and coming from the supply duct proper, towards the cylinder via the intake duct.

Ceci entraîne des risques de pollution de l'huile du moteur et peut constituer un réel danger si l'essence est restée au-dessus du piston, au moment du redémarrage du véhicule.This entails risks of pollution of the engine oil and can constitute a real danger if the petrol has remained above the piston, when the vehicle is restarted.

Ainsi suivant une variante du dispositif selon cette invention, la vis précitée pénètre dans une ouverture ménagée dans la plaque par son côté se trouvant en vis-à-vis du moteur et est vissée dans un écrou solidaire de ladite platine de façon à ce que le dévissage de la vis préalable au démontage d'un injecteur, rendu impossible à partir de la partie supérieure du moteur M, nécessite le démontage de la barrette.Thus according to a variant of the device according to this invention, the aforementioned screw enters an opening formed in the plate by its side facing the motor and is screwed into a nut integral with said plate so that the unscrewing the screw prior to disassembly of an injector, made impossible from the top of the engine M, requires disassembly of the bar.

On voit déjà que grâce aux caractéristiques techniques ci-dessus, l'accès à la tête de vis étant rendu impossible à partir de la partie supérieure du moteur, seul le démontage de toute la barrette permettra la désolidarisation de la plaque et de la platine autorisant le retrait de l'injecteur.We can already see that thanks to the above technical characteristics, access to the screw head being made impossible from the upper part of the engine, only the disassembly of the entire bar will allow the separation of the plate and the plate allowing removing the injector.

Suivant une réalisation particulière de l'invention, l'écrou précité est soudé sur la platine.According to a particular embodiment of the invention, the aforementioned nut is welded to the plate.

Selon une autre caractéristique de l'invention, une toile est disposée en vis-à-vis de la tête de la vis lorsque la barrette est en position de service. Cette toile est venue de forme avec la paroi du collecteur d'admission. Ceci permet d'augmenter l'efficacité du dispositif de sécurité en ajoutant un obstacle supplémentaire à l'accès à la tête de vis. Selon une autre caractéristique de l'invention, tous les injecteurs sont reliés par une seule et même platine, la plaque étant formée par une extension de la paroi des logements.According to another characteristic of the invention, a fabric is arranged opposite the head of the screw when the bar is in the service position. This fabric came in shape with the wall of the intake manifold. This increases the efficiency of the safety device by adding an additional barrier to access to the screw head. According to another characteristic of the invention, all the injectors are connected by a single plate, the plate being formed by an extension of the wall of the housings.

Mais d'autres avantages et caractéristiques de l'invention apparaîtront mieux dans la description détaillée qui suit et se réfère aux dessins annexés, donnés uniquement à titre d'exemples et dans lesquels :

  • La figure 1 est une vue partielle et en coupe transversale, du dispositif d'alimentation et de maintien de plusieurs injecteurs de carburant selon un premier mode de réalisation de l'invention, implanté dans un moteur à combustion interne ;
  • La figure 2 est une vue de dessus de ce dispositif sans les injecteurs ;
  • La figure 3 est une vue en coupe suivant la ligne III-III de la figure 2, et illustrant trois variantes de réalisation de montage étanche du conduit d'alimentation sur le conduit d'admission ;
  • La figure 4 est une vue en coupe, suivant la ligne IV-IV de la figure 3, et illustrant le conduit d'alimentation de l'invention sans la présence d'injecteur ;
  • Les figures 5 et 6 sont des vues en coupe suivant respectivement les ligne V-V et VI-VI de la figure 3.
  • La figure 7 est une vue de dessus du dispositif de l'invention selon un second mode de réalisation, les injecteurs étant montés dans les logements ;
  • La figure 8 est une vue en coupe suivant la ligne VIII-VIII de la figure 7 ; et
  • Les figures 9 et 10 sont des vues en coupe transversale de deux barrettes d'injecteur de l'invention, mises en place dans un moteur à combustion interne, suivant respectivement la ligne IX-IX et la ligne X-X de la figure 7.
However, other advantages and characteristics of the invention will appear better in the detailed description which follows and which refers to the appended drawings, given solely by way of examples and in which:
  • Figure 1 is a partial view in cross section of the device for supplying and holding several fuel injectors according to a first embodiment of the invention, located in an internal combustion engine;
  • Figure 2 is a top view of this device without the injectors;
  • Figure 3 is a sectional view along line III-III of Figure 2, and illustrating three alternative embodiments of sealed mounting of the supply duct on the intake duct;
  • Figure 4 is a sectional view along line IV-IV of Figure 3, and illustrating the supply conduit of the invention without the presence of an injector;
  • Figures 5 and 6 are sectional views along lines VV and VI-VI in Figure 3 respectively.
  • Figure 7 is a top view of the device of the invention according to a second embodiment, the injectors being mounted in the housings;
  • Figure 8 is a sectional view along line VIII-VIII of Figure 7; and
  • FIGS. 9 and 10 are cross-sectional views of two injector bars of the invention, placed in an internal combustion engine, along line IX-IX and line XX of FIG. 7 respectively.

En se reportant à la figure 1, on voit un des injecteurs 2 de carburant du système d'injection d'un moteur, introduit et centré dans un des logements 10 formés en même temps qu'un conduit d'alimentation latérale 1 des injecteurs 2. Ce logement 10 présente une forme correspondant sensiblement à celle de l'injecteur 2, et sa partie supérieure présente un évidement annulaire 100 destiné à recevoir une partie supérieure de forme correspondante de l'injecteur 2 de manière à assurer son positionnement dans ledit logement 10 (figure 5).Referring to FIG. 1, one sees one of the fuel injectors 2 of the injection system of an engine, introduced and centered in one of the housings 10 formed at the same time as a lateral supply duct 1 for the injectors 2 This housing 10 has a shape substantially corresponding to that of the injector 2, and its upper part has an annular recess 100 intended to receive an upper part of corresponding shape from the injector 2 so as to ensure its positioning in said housing 10 (figure 5).

Ce conduit d'alimentation 1 et ses logements 10 associés sont réalisés dans un matériau non poreux présentant des caractéristiques d'étanchéité au carburant satisfaisantes. La partie inférieure du logement 10 est introduite et centrée dans une ouverture 30 du conduit d'admission 3 d'un cylindre du moteur, à travers laquelle est injecté le carburant. Deux joints d'étanchéité au carburant 4 sont interposés respectivement, entre les parties supérieure 21 et inférieure 22 des injecteurs 2, et la paroi 11, 12 des logements 10 en regard de ces parties 21, 22, de sorte que la partie de l'injecteur 2 située entre ces deux joints 4 se trouve noyée dans le carburant. Pour assurer l'étanchéité de la liaison entre le logement 10 et le conduit d'admission 3 du cylindre, un joint 8 est interposé entre les parois d'extrémité de la partie inférieure 13 du logement 10 et les parois délimitant un évidement 17 ménagé dans le bord de l'ouverture 30 du conduit d'admission 3.This supply duct 1 and its associated housings 10 are made of a non-porous material having satisfactory fuel sealing characteristics. The lower part of the housing 10 is introduced and centered in an opening 30 of the intake duct 3 of an engine cylinder, through which the fuel is injected. Two fuel seals 4 are interposed respectively between the upper 21 and lower 22 parts of the injectors 2, and the wall 11, 12 of the housings 10 opposite these parts 21, 22, so that the part of the injector 2 located between these two seals 4 is embedded in the fuel. To seal the connection between the housing 10 and the intake duct 3 of the cylinder, a seal 8 is interposed between the end walls of the lower part 13 of the housing 10 and the walls delimiting a recess 17 formed in the edge of the opening 30 of the intake duct 3.

Sur les figures 2, 3, 4, 5 et 6, on voit que le dispositif d'alimentation et de maintien comporte trois logements 10 destinés à recevoir chacun un injecteur 2, reliés entre eux par une platine de renfort 18. Chaque injecteur 2 est maintenu en position dans son logement 10 au moyen d'une plaque 5 coiffant l'injecteur 2, dans laquelle a été ménagée une ouverture permettant le passage de la partie supérieure 24 de l'injecteur 2. La plaque précitée 5 prend appui par sa face inférieure sur le bord supérieur des logements 10, et est fixée sur la platine de renfort 18 par l'intermédiaire d'une vis de fixation 101.In FIGS. 2, 3, 4, 5 and 6, it can be seen that the supply and maintenance device comprises three housings 10 intended to each receive an injector 2, connected together by a reinforcing plate 18. Each injector 2 is held in position in its housing 10 by means of a plate 5 covering the injector 2, in which an opening has been provided allowing the passage of the upper part 24 of the injector 2. The aforementioned plate 5 is supported by its face lower on the upper edge of the housings 10, and is fixed to the reinforcing plate 18 by means of a fixing screw 101.

On voit en outre, que la fixation du dispositif selon l'invention, sur le conduit d'admission 3, est réalisée au moyen d'une platine 14, formée à la base des logements 10, et dans laquelle a été ménagée une ouverture 14a pour le passage d'une vis de fixation destinée à être vissée sur le conduit d'admission 3 du cylindre. Pour permettre ce vissage dans le cas du logement 10 médian, il est prévu, dans la platine 18, une découpe 18a, au droit de l'ouverture 14a pratiquée dans la platine 14 solidaire de ce logement. Il est à noter que l'on peut prévoir également une fixation de la platine 14 au voisinage dudit conduit d'admission 3.It can also be seen that the device according to the invention is fixed to the intake duct 3 by means of a plate 14, formed at the base of the housings 10, and in which an opening 14a has been formed. for the passage of a fixing screw intended to be screwed onto the intake duct 3 of the cylinder. To allow this screwing in the case of the middle housing 10, there is provided, in the plate 18, a cutout 18a, in line with the opening 14a made in the plate 14 secured to this housing. It should be noted that provision may also be made for fixing the plate 14 in the vicinity of said intake duct 3.

Sur la figure 3, on voit que l'étanchéité entre la partie inférieure 13 du logement 10 et l'ouverture courrespondante 30 du conduit d'admission 3 est obtenue de façon différente pour les trois injecteurs 2.In FIG. 3, it can be seen that the seal between the lower part 13 of the housing 10 and the corresponding opening 30 of the intake duct 3 is obtained differently for the three injectors 2.

Ainsi, l'étanchéité peut être obtenue grâce à l'interposition d'un joint plat 6 entre la paroi d'extrémité inférieure du logement 10 et les parois délimitant un évidement 15 ménagé dans le bord supérieur de l'ouverture correspondante 30 du conduit d'admission 3.Thus, the seal can be obtained by interposing a flat seal 6 between the lower end wall of the housing 10 and the walls defining a recess 15 formed in the upper edge of the corresponding opening 30 of the conduit d admission 3.

Cette étanchéité peut également être obtenue au moyen d'un joint torique 7 interposé entre les parois délimitant un évidement 16 ménagé dans la partie inférieure et latérale de la paroi du logement 10 et les surfaces délimitant l'ouverture correspondante 30 du conduit d'admission 3 en regard de ces parois.This sealing can also be obtained by means of an O-ring 7 interposed between the walls delimiting a recess 16 formed in the lower and lateral part of the wall of the housing 10 and the surfaces delimiting the corresponding opening 30 of the intake duct 3 opposite these walls.

Enfin, l'étanchéité peut être réalisée par un joint plat 8 interposé entre la paroi inférieure 140 de la platine précitée 14, et les parois délimitant un évidement 17 ménagé dans le bord supérieur de l'ouverture correspondante 30 du conduit 3 précité.Finally, the seal can be achieved by a flat seal 8 interposed between the lower wall 140 of the aforementioned plate 14, and the walls defining a recess 17 formed in the upper edge of the corresponding opening 30 of the aforementioned conduit 3.

Le choix entre ces trois possibilités pour l'obtention de l'étanchéité précitée dépendra de la disposition adoptée pour centrer l'extrémité du logement 10 dans l'ouverture 30 du conduit d'admission 3.The choice between these three possibilities for obtaining the abovementioned seal will depend on the arrangement adopted for centering the end of the housing 10 in the opening 30 of the intake duct 3.

Il est à noter que d'autres possibilités pourront être envisagées. On pourra prévoir par exemple un joint plat comprimé unique pour tous les logements avec assemblage du porte joint au moyen de goupilles ou de vis centreuses.It should be noted that other possibilities may be considered. We can provide for example a single compressed flat seal for all housing with assembly of the seal holder by means of pins or centering screws.

Le joint d'étanchéité sert également d'isolant thermique et permet de diminuer la valeur de la température au voisinage de l'extrémité de l'injecteur introduite dans l'ouverture du conduit d'admission.The gasket also serves as thermal insulation and reduces the value of the temperature in the vicinity of the end of the injector introduced into the opening of the intake duct.

En fonctionnement, les injecteurs 2 sont positionnés, centrés et maintenus dans les logements 10 du conduit d'alimentation 1, celui-ci dirigeant le carburant autour des parois latérales des injecteurs 2 sans occasionner de fuites de carburant en dehors dudit conduit 1.In operation, the injectors 2 are positioned, centered and maintained in the housings 10 of the supply duct 1, the latter directing the fuel around the side walls of the injectors 2 without causing fuel to leak out of said duct 1.

L'ensemble du conduit d'alimentation et de ses logements associés (barrette) peut être réalisé dans tout matériau présentant une étanchéité suffisante au carburant : aluminium matière, matériau ferreux en mécano-soudure, plastique injecté sous pression etc...All of the supply duct and its associated housings (bar) can be made of any material having sufficient fuel tightness: aluminum material, ferrous material in mechanical welding, plastic injected under pressure, etc.

Cet ensemble présente également l'avantage d'être autonome, en ce sens qu'il permet la mise en place des injecteurs en dehors de la ligne d'assemblage du moteur. Ce qui permettra de vérifier l'étanchéité du dispositif, sur un poste spécifique, avant son montage. Ce qui se traduira par une amélioration qualitative de la production.This assembly also has the advantage of being autonomous, in the sense that it allows the installation of the injectors outside the engine assembly line. This will verify the tightness of the device, on a specific station, before mounting. This will result in a qualitative improvement in production.

Les dispositifs d'alimentation et de maintien de plusieurs injecteurs conformes à l'invention, ou barrettes, pourront être adaptés à chaque type d'injecteur sans que l'on soit obligé de modifier la structure du collecteur d'admission.The devices for supplying and holding several injectors according to the invention, or bars, can be adapted to each type of injector without it being necessary to modify the structure of the intake manifold.

En se reportant aux figures 7 et 8, le dispositif de maintien et d'alimentation de plusieurs injecteurs de carburant selon le second mode de réalisation, appelé communément barrette d'injecteur, comprend principalement un conduit d'alimentation (ou rampe) 1, comportant plusieurs logements 10 venus de forme avec ledit conduit d'alimentation 1 et destinés à loger chacun un injecteur 2. Le maintien en position de chaque injecteur est assuré par d'une part, un épaulement formé à la partie supérieure de l'injecteur 2, prenant appui par sa surface inférieure, sur une surface horizontale d'un évidement 100 de forme correspondante prévu à la partie supérieure de la paroi du logement 10, et par d'autre part une plaque 5 venue de forme avec le conduit d'alimentation 1, traversée par la partie supérieure des injecteurs 2 et sur laquelle est fixée une platine de renfort 18, au moyen de vis d'assemblage 101.Referring to FIGS. 7 and 8, the device for holding and supplying several fuel injectors according to the second embodiment, commonly called injector bar, mainly comprises a supply duct (or ramp) 1, comprising a plurality of housings 10 which are shaped with said supply duct 1 and intended to house each an injector 2. The holding in position of each injector is ensured by on the one hand, a shoulder formed at the upper part of the injector 2, supported by its lower surface, on a horizontal surface of a recess 100 of corresponding shape provided at the upper part of the wall of the housing 10, and on the other hand a plate 5 come in shape with the supply duct 1, crossed by the upper part of the injectors 2 and on which is fixed a plate reinforcement 18, by means of assembly screws 101.

Selon cette réalisation, l'assemblage précité est réalisé par l'intermédiaire d'une vis 101 et d'un écrou 102 solidaire de la platine précitée 18, la tête 103 de la vis 101 étant orientée du côté du moteur (non représenté sur cette figure mais visible sur la figure 3), et en conséquence, rendue inaccessible à partir de la partie supérieure de ce moteur.According to this embodiment, the aforementioned assembly is carried out by means of a screw 101 and a nut 102 secured to the aforementioned plate 18, the head 103 of the screw 101 being oriented on the side of the motor (not shown in this figure but visible in Figure 3), and therefore made inaccessible from the top of this engine.

Dans cette forme particulière de réalisation de l'invention, l'écrou précité 102 est soudé sur la partie supérieure de la platine 18.In this particular embodiment of the invention, the above-mentioned nut 102 is welded to the upper part of the plate 18.

On voit sur les figures 9 et 10 deux barrettes d'injecteurs fixées sur un collecteur d'admission 9 au voisinage des conduits d'admission 3 des cylindres dans un moteur à combustion interne M. Selon ce mode particulier de réalisation de l'invention, le collecteur d'admission 9 comporte une partie en saillie 90 ou toile sous la tête 103 de la vis 101 d'assemblage de la plaque 5 sur la platine 18, destinée à augmenter l'inaccessibilité de la tête 103 de la vis 101 lorsque la barrette est en place.FIGS. 9 and 10 show two strips of injectors fixed to an intake manifold 9 in the vicinity of the intake conduits 3 of the cylinders in an internal combustion engine M. According to this particular embodiment of the invention, the intake manifold 9 has a projecting part 90 or fabric under the head 103 of the screw 101 for assembling the plate 5 on the plate 18, intended to increase the inaccessibility of the head 103 of the screw 101 when the bar is in place.

C'est ainsi que lorsqu'un opérateur souhaitera démonter un ou plusieurs injecteurs de leur logement 10, il devra préalablement désolidariser la barrette de l'élément de structure sur laquelle elle est fixée, pour pouvoir accéder à la tête 103 de la vis 101 d'assemblage de la plaque 5 sur la platine de renfort 18, par dévissage de toutes les vis 141 prévues à la partie inférieure des logements 10, puis il procédera au dévissage de toutes les vis 101 d'assemblage de la platine de renfort 18 sur la plaque de maintien 5.Thus, when an operator wishes to dismantle one or more injectors from their housing 10, he must first separate the bar from the structural element on which it is fixed, in order to be able to access the head 103 of the screw 101 for assembling the plate 5 on the reinforcing plate 18, by unscrewing all the screws 141 provided at the lower part of the housings 10, then it will unscrew all the screws 101 for assembling the reinforcing plate 18 on the retaining plate 5.

On a donc réalisé suivant l'invention, un dispositif d'alimentation latérale et de maintien de plusieurs injecteurs, peu encombrant, indépendant du collecteur d'admission, et qui permet d'éviter les inconvénients liés à l'obligation de réaliser un conduit d'alimentation intégré au collecteur d'admission, ce dispositif pouvant être adapté à chaque type d'injecteur.Thus, according to the invention, a device for lateral supply and holding of several injectors has been produced, compact, independent of the intake manifold, and which makes it possible to avoid the drawbacks linked to the obligation to produce a duct for power integrated into the intake manifold, this device can be adapted to each type of injector.

Grâce à l'invention la barrette est rendue indémontable lorsque le support est fixé sur le moteur.Thanks to the invention the bar is made non-removable when the support is fixed to the engine.

Ces opérations de démontage des injecteurs seront donc obligatoirement réalisées loin du moteur, ce qui permet d'éviter l'écoulement du carburant dans les cylindres occasionné lorsque les injecteurs sont démontés alors que la barrette est encore en place.These injector disassembly operations will therefore necessarily be carried out far from the engine, which avoids the flow of fuel into the cylinders caused when the injectors are disassembled while the bar is still in place.

On notera également que que la vis d'assemblage pourra être remplacée par exemple par une tige filetée et deux écrous, dont l'un serait formé par la platine.It will also be noted that the assembly screw could be replaced for example by a threaded rod and two nuts, one of which would be formed by the plate.

Claims (11)

Dispositif d'alimentation et de maintien de plusieurs injecteurs de carburant (2) pour un moteur à combustion interne (M), ces injecteurs étant alimentés latéralement par un conduit d'alimentation (1), et étant logés et centrés respectivement dans plusieurs logements (10) venus de forme avec ledit conduit d'alimentation et dont la partie inférieure (13) est reliée de façon étanche à une ouverture (30) du conduit d'admission du carburant dans un cylindre du moteur, le conduit d'alimentation précité (1) et ses logements associés (10) étant réalisés en un matériau non poreux, caractérisé en ce que les logements (10) sont reliés entre eux par une platine de renfort (18) et en ce que les injecteurs (2) sont maintenus en position dans les logements (10) grâce à une plaque (5) fixée sur la platine de renfort (18) au moyen d'une vis (101).Device for supplying and holding several fuel injectors (2) for an internal combustion engine (M), these injectors being fed laterally by a supply duct (1), and being housed and centered respectively in several housings ( 10) which have come into shape with said supply duct and the lower part (13) of which is tightly connected to an opening (30) in the fuel intake duct in an engine cylinder, the aforementioned supply duct ( 1) and its associated housings (10) being made of a non-porous material, characterized in that the housings (10) are interconnected by a reinforcing plate (18) and in that the injectors (2) are held in position in the housings (10) by means of a plate (5) fixed to the reinforcing plate (18) by means of a screw (101). Dispositif selon la revendication 1, caractérisé en ce que la partie inférieure (13) de la paroi des logements (10) comporte une platine (14), assurant la fixation du dispositif d'alimentation et de maintien sur le conduit d'admission (3) ou à proximité de ce conduit d'admission (3) du cylindre.Device according to claim 1, characterized in that the lower part (13) of the wall of the housings (10) comprises a plate (14), ensuring the fixing of the supply and holding device on the intake duct (3 ) or near this intake duct (3) of the cylinder. Dispositif selon les revendications 1 ou 2, caractérisé en ce qu'un joint d'étanchéité plat (6) est interposé entre la partie inférieure (13) de la paroi d'au moins un logement (10) et le bord de l'ouverture correspondante (30) du conduit d'admission (3).Device according to claims 1 or 2, characterized in that a flat seal (6) is interposed between the lower part (13) of the wall of at least one housing (10) and the edge of the opening corresponding (30) of the intake duct (3). Dispositif selon la revendication 1 ou 2, caractérisé en ce que l'étanchéité entre la partie inférieure (13) de la paroi d'au moins un logement (10) et le bord de l'ouverture correspondante (30) du conduit d'admission (3) est réalisée au moyen d'un joint torique (7).Device according to claim 1 or 2, characterized in that the seal between the lower part (13) of the wall of at least one housing (10) and the edge of the corresponding opening (30) of the intake duct (3) is produced by means of an O-ring (7). Dispositif selon la revendication 2, caractérisé en ce qu'un joint d'étanchéité plat (8) est interposé entre la paroi inférieure de la platine (14) d'au moins un logement (10) et le bord de l'ouverture correspondante (30) du conduit d'admission (3).Device according to claim 2, characterized in that a flat seal (8) is interposed between the lower wall of the plate (14) of at least one housing (10) and the edge of the corresponding opening ( 30) of the intake duct (3). Dispositif selon la revendication 1 ou 2, caractérisé en ce que la vis précitée (101) pénètre dans une ouverture ménagée dans la plaque (5) par son côté se trouvant en vis-à-vis du moteur M et est vissée dans un écrou (102) solidaire de ladite platine (18) de façon à ce que le dévissage de la vis (101) préalable au démontage d'un injecteur (2), rendu impossible à partir de la partie supérieure du moteur M, nécessite le démontage de la barrette B.Device according to claim 1 or 2, characterized in that the aforementioned screw (101) enters an opening in the plate (5) by its side facing the motor M and is screwed into a nut ( 102) secured to said plate (18) so that the unscrewing of the screw (101) prior to disassembly of an injector (2), made impossible from the upper part of the engine M, requires disassembly of the bar B. Dispositif selon la revendication 6, caractérisé en ce que l'écrou précité (102) est soudé sur la platine précitée (18).Device according to claim 6, characterized in that the aforementioned nut (102) is welded to the aforementioned plate (18). Dispositif selon la revendication 6 ou 7, caractérisé en ce qu'une toile (90) est disposée en vis-à-vis de la tête (103) de la vis (101) lorsque la barrette B est en position de service.Device according to claim 6 or 7, characterized in that a fabric (90) is arranged opposite the head (103) of the screw (101) when the bar B is in the service position. Dispositif selon l'une des revendications 6 à 8, caractérisé en ce que la toile (90) est venue de forme avec la paroi du collecteur d'admission (9).Device according to one of claims 6 to 8, characterized in that the fabric (90) has come into shape with the wall of the intake manifold (9). Dispositif selon l'une quelconque des revendications 6 à 9, caractérisé en ce que tous les injecteurs (2) sont reliés par une seule et même platine (18).Device according to any one of claims 6 to 9, characterized in that all the injectors (2) are connected by a single and same plate (18). Dispositif selon l'une quelconque des revendications 6 à 10, caractérisé en ce que la plaque précitée (5) est formée par une extension de la paroi des logements (10).Device according to any one of Claims 6 to 10, characterized in that the above-mentioned plate (5) is formed by an extension of the wall of the housings (10).
EP91402392A 1990-09-12 1991-09-06 Device for feeding fuel to and holding several fuel injectors for an internal combustion engine Withdrawn EP0475829A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9011274A FR2666626B1 (en) 1990-09-12 1990-09-12 DEVICE FOR SUPPLYING AND HOLDING MULTIPLE FUEL INJECTORS FOR AN INTERNAL COMBUSTION ENGINE.
FR9011274 1990-09-12
FR9103455 1991-03-21
FR9103455A FR2674292B1 (en) 1991-03-21 1991-03-21 DEVICE FOR SUPPLYING AND HOLDING MULTIPLE FUEL INJECTORS FOR AN INTERNAL COMBUSTION ENGINE WITH INCORPORATED CYLINDER PROTECTION SYSTEM.

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EP0475829A1 true EP0475829A1 (en) 1992-03-18

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EP91402392A Withdrawn EP0475829A1 (en) 1990-09-12 1991-09-06 Device for feeding fuel to and holding several fuel injectors for an internal combustion engine

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5372113A (en) * 1994-01-25 1994-12-13 Siemens Automotive L.P. Weir control of fuel level in a fuel rail tube for reducing the risk of hydra-lock
WO2020154153A1 (en) * 2019-01-24 2020-07-30 Caterpillar Inc. Fuel rail

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788287A (en) * 1972-02-18 1974-01-29 Gen Motors Corp Fuel injection system
DE3228508A1 (en) * 1982-07-30 1984-02-02 Robert Bosch Gmbh, 7000 Stuttgart FUEL SUPPLY PIPE
DE3326408A1 (en) * 1982-08-23 1984-02-23 General Motors Corp., Detroit, Mich. MOUNTING RACK FOR FUEL INJECTION DEVICES OF INTERNAL COMBUSTION ENGINES
US4475486A (en) * 1982-02-18 1984-10-09 General Motors Corporation Engine induction system
DE3644552A1 (en) * 1986-12-24 1988-07-07 Pierburg Gmbh Fuel distributor rail for spark ignition engines
US4768487A (en) * 1985-11-22 1988-09-06 Nissan Motor Company, Limited Internal combustion engine intake passage
EP0306739A2 (en) * 1987-09-11 1989-03-15 Robert Bosch Gmbh Device for mounting, supplying fuel to and electrically connecting electromagnetic fuel injectors together
WO1989004919A2 (en) * 1987-11-16 1989-06-01 Siemens-Bendix Automotive Electronics L.P. Pico fuel injector valve
FR2638490A1 (en) * 1988-11-03 1990-05-04 Weber Srl METHOD FOR MANUFACTURING A FUEL DISPENSER FOR SUPPLYING FUEL TO THE DOSING AND ATOMIZING VALVES OF AN INTERNAL COMBUSTION ENGINE SUPPLY VALVE
US4950171A (en) * 1989-08-11 1990-08-21 Itt Corporation Fuel injector connector system
WO1990013740A1 (en) * 1989-05-09 1990-11-15 Robert Bosch Gmbh Fuel distributor for fuel injection installations in internal combustion engines

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788287A (en) * 1972-02-18 1974-01-29 Gen Motors Corp Fuel injection system
US4475486A (en) * 1982-02-18 1984-10-09 General Motors Corporation Engine induction system
DE3228508A1 (en) * 1982-07-30 1984-02-02 Robert Bosch Gmbh, 7000 Stuttgart FUEL SUPPLY PIPE
DE3326408A1 (en) * 1982-08-23 1984-02-23 General Motors Corp., Detroit, Mich. MOUNTING RACK FOR FUEL INJECTION DEVICES OF INTERNAL COMBUSTION ENGINES
US4768487A (en) * 1985-11-22 1988-09-06 Nissan Motor Company, Limited Internal combustion engine intake passage
DE3644552A1 (en) * 1986-12-24 1988-07-07 Pierburg Gmbh Fuel distributor rail for spark ignition engines
EP0306739A2 (en) * 1987-09-11 1989-03-15 Robert Bosch Gmbh Device for mounting, supplying fuel to and electrically connecting electromagnetic fuel injectors together
WO1989004919A2 (en) * 1987-11-16 1989-06-01 Siemens-Bendix Automotive Electronics L.P. Pico fuel injector valve
FR2638490A1 (en) * 1988-11-03 1990-05-04 Weber Srl METHOD FOR MANUFACTURING A FUEL DISPENSER FOR SUPPLYING FUEL TO THE DOSING AND ATOMIZING VALVES OF AN INTERNAL COMBUSTION ENGINE SUPPLY VALVE
WO1990013740A1 (en) * 1989-05-09 1990-11-15 Robert Bosch Gmbh Fuel distributor for fuel injection installations in internal combustion engines
US4950171A (en) * 1989-08-11 1990-08-21 Itt Corporation Fuel injector connector system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 14, no. 418 (M-1022)(4361) 10 Septembre 1990 & JP-A-2 163 464 ( NIPPON DENSO ) 22 Juin 1990 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5372113A (en) * 1994-01-25 1994-12-13 Siemens Automotive L.P. Weir control of fuel level in a fuel rail tube for reducing the risk of hydra-lock
WO2020154153A1 (en) * 2019-01-24 2020-07-30 Caterpillar Inc. Fuel rail
US10794346B2 (en) 2019-01-24 2020-10-06 Caterpillar Inc. Fuel rail
CN113302393A (en) * 2019-01-24 2021-08-24 卡特彼勒公司 Fuel rail
CN113302393B (en) * 2019-01-24 2024-06-21 卡特彼勒公司 Fuel Rail

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