FR2663993A1 - Device for feeding and mounting side-feed injectors of an internal-combustion engine - Google Patents

Device for feeding and mounting side-feed injectors of an internal-combustion engine Download PDF

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Publication number
FR2663993A1
FR2663993A1 FR9008074A FR9008074A FR2663993A1 FR 2663993 A1 FR2663993 A1 FR 2663993A1 FR 9008074 A FR9008074 A FR 9008074A FR 9008074 A FR9008074 A FR 9008074A FR 2663993 A1 FR2663993 A1 FR 2663993A1
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FR
France
Prior art keywords
flange
injector
cylinder head
injectors
feeding device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR9008074A
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French (fr)
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FR2663993B1 (en
Inventor
Garro Denis
Marcon Patrice
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.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
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Publication date
Application filed by Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Priority to FR9008074A priority Critical patent/FR2663993B1/en
Publication of FR2663993A1 publication Critical patent/FR2663993A1/en
Application granted granted Critical
Publication of FR2663993B1 publication Critical patent/FR2663993B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F02M61/145—Arrangements of injectors with respect to engines; Mounting of injectors the injection nozzle opening into the air intake conduit

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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

Device for feeding and mounting side-feed injectors (1) of an internal-combustion engine, of the indirect injection type, which comprises, on the one hand, housings (2) for injectors (1) which are formed directly in the cylinder head (3), and which comprises, on the other hand, the feed line (4) which is also located inside this cylinder head (3).

Description

DISPOSITIF D'ALIMENTATION ET DE MONTAGE DES INJECTEURS A
ALIMENTATION LATERALE D'UN MOTEUR A COMBUSTION INTERNE.DEVICE FOR SUPPLYING AND MOUNTING INJECTORS TO
SIDE SUPPLY OF AN INTERNAL COMBUSTION ENGINE.

La présente invention se rapporte à un dispositif d'alimentation et de montage des injecteurs à alimentation latérale d'un moteur à combustion interne du type à injection indirecte, qui est monté notamment sur des véhicules autombiles de tourisme. The present invention relates to a device for supplying and mounting the injectors with lateral supply of an internal combustion engine of the indirect injection type, which is mounted in particular on self-propelled passenger vehicles.

Dans de nombreux véhicules automobiles de tourisme modernes, le moteur est disposé transversalement avec les conduits d'admission vers l'avant. De ce fait la rampe d'essence est très vulnérable en cas de choc frontal, avec pour conséquence un risque d'incendie. Des injecteurs comportant une alimentation d'essence latérale près du nez, sont apparus récemment sur le marché afin de répondre à ce problème. Dans le montage connu avec une rampe d'essence classique, cela nécessite plus de matière et d'usinage pour cette rampe ce qui entrasse une augmentation du prix de revient. In many modern passenger motor vehicles, the engine is arranged transversely with the intake ducts forward. As a result, the fuel bar is very vulnerable in the event of a frontal impact, with the consequence of a fire risk. Injectors with a lateral fuel supply near the nose have recently appeared on the market in order to respond to this problem. In the known assembly with a conventional fuel rail, this requires more material and machining for this rail, which leads to an increase in the cost price.

Le but de la présente invention est de proposer un dispositif d'alimentation et de montage des injecteurs à alimentation latérale le plus compact possible. The object of the present invention is to provide a device for supplying and mounting injectors with lateral supply as compact as possible.

Selon un mode de réalisation de l'invention, le dispositif d'alimentation et de montage des injecteurs à alimentation latérale d'un moteur à combustion interne, du type à injection indirecte, comporte des logements dtinjecteurs qui sont aménagés directement dans la culasse. De plus la rampe d'alimentation est également disposée à l'intérieur de cette culasse.  According to one embodiment of the invention, the device for supplying and mounting the injectors with lateral supply of an internal combustion engine, of the type with indirect injection, comprises injector housings which are arranged directly in the cylinder head. In addition, the feed ramp is also arranged inside this cylinder head.

Selon une variante de l'invention, chacun des logements d'injecteurs est constitué par un trou qui débouche dans un le conduit d'admission correspondant. Ce trou se prolonge de l'autre côté par un logement cylindrique du joint de nez de l'injecteur, qui s' évase dans un logement cylindrique principal destiné à recevoir le corps de l'injecteur avec son joint. De plus un lamage externe coopère avec une collerette de l'injecteur de manière à permettre son positionnement axial. La collerette est maintenue en position au moyen d'un système de fixation. According to a variant of the invention, each of the injector housings consists of a hole which opens into a corresponding intake duct. This hole is extended on the other side by a cylindrical housing of the injector nose seal, which flares in a main cylindrical housing intended to receive the body of the injector with its seal. In addition, an external counterbore cooperates with a flange of the injector so as to allow its axial positioning. The collar is held in position by means of a fixing system.

Le système de fixation est constitué par une bride qui vient se monter sur deux méplats de l'injecteur au moyen de faces parallèles aménagées dans une cavité en forme de U. Cette bride est fixée sur une face usinée de la culasse par l'intermédiaire d'un système fileté qui s'engage dans un trou de ladite bride et qui vient se serrer dans la culasse. Selon une variante de l'invention ce système fileté peut être un goujon avec une rondelle et un écrou. Dans une autre variante de l'invention ce système fileté est constitué par une vis. The fixing system is constituted by a flange which is mounted on two flats of the injector by means of parallel faces arranged in a U-shaped cavity. This flange is fixed on a machined face of the cylinder head by means of 'A threaded system which engages in a hole in said flange and which is tightened in the cylinder head. According to a variant of the invention, this threaded system can be a stud with a washer and a nut. In another variant of the invention, this threaded system consists of a screw.

Le dispositif d'alimentation et de montage des injecteurs selon l'invention présente ainsi l'avantage d'avoir une rampe d'essence et des logements d'injecteurs qui sont intégrés à la fonderie de la culasse. Le montage ainsi obtenu assure une robustesse maximale en cas de choc frontal sur le véhicule. De plus le positionnement de l'injecteur, et donc la précision du tir, sont améliorés par la supression de l'assemblage de la rampe sur la culasse, ce qui réduit le nombre des éléments qui remplissent la fonction demandée. Enfin les économies sont réalisées en supprimant les usinages nécessaires à la liaison entre la rampe et la culasse, ainsi que le temps de montage pour effectuer cette opération.Il faut également souligner qu'il y a suppression de l'étanchéité nécessaire à la liaison entre la rampe et la culasse, qu'il y a suppression des éléments d'assemblage pour cette liaison, et qu'il y a suppression de pièces en étude, en fabrication et en après-vente. The injector supply and mounting device according to the invention thus has the advantage of having a fuel rail and injector housings which are integrated into the foundry of the cylinder head. The assembly thus obtained ensures maximum robustness in the event of a frontal impact on the vehicle. In addition the positioning of the injector, and therefore the accuracy of the shot, are improved by removing the assembly of the ramp on the cylinder head, which reduces the number of elements that fulfill the requested function. Finally, savings are made by eliminating the machining necessary for the connection between the ramp and the cylinder head, as well as the assembly time to perform this operation. It should also be noted that the sealing required for the connection between the ramp and the cylinder head, that there is elimination of the assembly elements for this connection, and that there is suppression of parts in study, in manufacture and in after-sales.

D'autres caractéristiques et avantages de la présente invention ressortiront de la description qui suit le mode de réalisation donné à titre d'exemple en référence aux dessins annexés sur lesquels
- la figure 1 représente le dispositif d'alimentation et de montage des injecteurs à alimentation latérale selon l'invention par une coupe transversale passant par l'axe de l'un des injecteurs;
- la figure 2 est une coupe transversale analogue à la figure 1 d'un autre mode de réalisation de montage des injecteurs.Other characteristics and advantages of the present invention will emerge from the description which follows the embodiment given by way of example with reference to the appended drawings in which
- Figure 1 shows the device for supplying and mounting injectors with lateral supply according to the invention by a cross section passing through the axis of one of the injectors;
- Figure 2 is a cross section similar to Figure 1 of another embodiment of the injector mounting.

Le dispositif d'alimentation et de montage des injecteurs 1 à alimentation latérale d'un moteur à combustion interne, du type à injection indirecte, selon l'invention est représenté sur la figure 1. Ce dispositif comporte des logements 2 d'injecteur 1 qui sont aménagés directement dans la culasse 3. D'autre part, chaque rampe d'alimentation 4 est également disposée à l'intérieur de cette culasse 3. The device for supplying and mounting the injectors 1 with lateral supply of an internal combustion engine, of the type with indirect injection, according to the invention is shown in FIG. 1. This device comprises housings 2 of injector 1 which are arranged directly in the cylinder head 3. On the other hand, each supply ramp 4 is also disposed inside this cylinder head 3.

Chacun des logements 2 des injecteurs 1 est constitué par un trou 5 qui débouche dans le conduit d'andmission 6 correspondant. Ce trou 5 se prolonge de l'autre côté par un logement cylindrique 7 qui reçoit le joint 8 du nez 9 de l'injecteur 1. Chaque logement 7 s'évase dans un autre logement cylindrique principal 10 qui reçoit le corps 11 de l'injecteur 1 avec son joint 12. Un lamage externe 13 est aménagé dans la culasse 3, et reçoit une collerette 14 de l'injecteur 1. Cette collerette 14 permet ainsi d'assurer le positionnement axial de l'injecteur 1, et elle est maintenue en position au moyen d'un système de fixation. Each of the housings 2 of the injectors 1 is constituted by a hole 5 which opens into the corresponding andmission conduit 6. This hole 5 is extended on the other side by a cylindrical housing 7 which receives the seal 8 from the nose 9 of the injector 1. Each housing 7 flares into another main cylindrical housing 10 which receives the body 11 of the injector 1 with its seal 12. An external counterbore 13 is arranged in the cylinder head 3, and receives a flange 14 from the injector 1. This flange 14 thus makes it possible to ensure the axial positioning of the injector 1, and it is maintained in position by means of a fixing system.

Le système de fixation selon l'invention est constitué par une bride 15, qui vient se monter sur deux méplats 16 de l'injecteur 1. The fixing system according to the invention consists of a flange 15, which is mounted on two flats 16 of the injector 1.

Cette bride 15 possède une cavité 18 en forme de U qui est munie de deux faces parallèles 17. Ces deux faces paralleles 17 coopèrent avec chacun des deux méplats correspondants 16. La bride 15 est fixée sur une face usinée 19 de la culasse 3 par l'intermédiaire d'un système fileté, qui s'engage dans un trou 20 de ladite bride 15 et qui vient se serrer dans la culasse 3.This flange 15 has a U-shaped cavity 18 which is provided with two parallel faces 17. These two parallel faces 17 cooperate with each of the two corresponding flats 16. The flange 15 is fixed on a machined face 19 of the cylinder head 3 by l 'through a threaded system, which engages in a hole 20 in said flange 15 and which is tightened in the cylinder head 3.

Dans le cas de la figure 1, le système fileté est constitué par un goujon et un écrou 21 et par une rondelle 22. Dans le cas de la figure 2, le système fileté consiste en une vis qui vient se monter directement dans la culasse 3.  In the case of Figure 1, the threaded system is constituted by a stud and a nut 21 and by a washer 22. In the case of Figure 2, the threaded system consists of a screw which is mounted directly in the cylinder head 3 .

Claims (5)

REVENDICATIONS 1. Dispositif d'alimentation et de montage des injecteurs (1) à alimentation latérale d'un moteur à combustion interne, du type à injection indirecte, caractérisé en ce que, d'une part des logements (2) d'injecteurs (1) sont aménagés directement dans la culasse (3), et que d'autre part la rampe d'alimentation (4) est également disposée à l'intérieur de cette culasse (3). 1. Device for supplying and mounting injectors (1) with lateral supply to an internal combustion engine, of the indirect injection type, characterized in that, on the one hand, injector housings (2) (1 ) are arranged directly in the cylinder head (3), and that on the other hand the feed ramp (4) is also disposed inside this cylinder head (3). 2. Dispositif d'alimentation selon la revendication 1 caractérisé en ce que chacun des logements (2) des injecteurs (1) est constitué par un trou (5), qui débouche dans le conduit d'admission (10) correspondant; ledit trou (5) se prolongeant de l'autre côté par un logement cylindrique (7) destiné à recevoir le joint (8) du nez (9) de l'injecteur (1); ledit logement (7) s'évasant dans un logement cylindrique principal (10) qui reçoit l'e corps (11) dudit injecteur (1) muni de son joint (12); un lamage externe (13) coopérant avec une collerette (14) de l'injecteur (1) de manière à assurer son positionnement axial, ladite collerette (14) étant maintenue en position au moyen d'un système de fixation. 2. Feeding device according to claim 1 characterized in that each of the housings (2) of the injectors (1) consists of a hole (5), which opens into the corresponding intake duct (10); said hole (5) extending on the other side by a cylindrical housing (7) intended to receive the seal (8) of the nose (9) of the injector (1); said housing (7) flaring in a main cylindrical housing (10) which receives the body (11) of said injector (1) provided with its seal (12); an external counterbore (13) cooperating with a flange (14) of the injector (1) so as to ensure its axial positioning, said flange (14) being held in position by means of a fixing system. 3. Dispositif d'alimentation selon la revendication 2 caractérisé en ce que le système de fixation est constitué par une bride (15), qui vient se monter sur deux méplats (16) de l'injecteur (1) au moyen de deux faces parallèles (17) aménagées dans une cavité (18) en forme de U de ladite bride (15); cette bride (15) étant fixée sur une face usinée (19 de la culasse (3) par l'intermédiaire d'un système fileté, qui s' engage dans un trou (20) de ladite bride (15), et qui vient se serrer dans la culasse (3). 3. Feeding device according to claim 2 characterized in that the fixing system consists of a flange (15), which is mounted on two flats (16) of the injector (1) by means of two parallel faces (17) arranged in a U-shaped cavity (18) of said flange (15); this flange (15) being fixed on a machined face (19 of the cylinder head (3) by means of a threaded system, which engages in a hole (20) of said flange (15), and which comes tighten in the cylinder head (3). 4. Dispositif d d'alimentation selon la revendication 3 caractérisé en ce que le système fileté est constitué par un goujon et un écrou (21) avec une rondelle (22). 4. Feeding device according to claim 3 characterized in that the threaded system consists of a stud and a nut (21) with a washer (22). 5. Dispositif d'alimentation selon la revendication 3 caractérisé en ce que le système fileté est constitué par une vis (23).  5. Feeding device according to claim 3 characterized in that the threaded system consists of a screw (23).
FR9008074A 1990-06-27 1990-06-27 DEVICE FOR SUPPLYING AND MOUNTING SIDE SUPPLY INJECTORS OF AN INTERNAL COMBUSTION ENGINE. Expired - Fee Related FR2663993B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9008074A FR2663993B1 (en) 1990-06-27 1990-06-27 DEVICE FOR SUPPLYING AND MOUNTING SIDE SUPPLY INJECTORS OF AN INTERNAL COMBUSTION ENGINE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9008074A FR2663993B1 (en) 1990-06-27 1990-06-27 DEVICE FOR SUPPLYING AND MOUNTING SIDE SUPPLY INJECTORS OF AN INTERNAL COMBUSTION ENGINE.

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FR2663993A1 true FR2663993A1 (en) 1992-01-03
FR2663993B1 FR2663993B1 (en) 1994-09-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3940222A1 (en) 2020-07-17 2022-01-19 RENAULT s.a.s. Gas fuel injection rail
FR3112574A1 (en) 2020-07-17 2022-01-21 Renault S.A.S Gas heater in injection rail with metal insert

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2091778A5 (en) * 1970-05-22 1972-01-14 Gen Motors Corp
FR2125080A5 (en) * 1971-02-05 1972-09-22 Cav Ltd
US3750960A (en) * 1971-11-05 1973-08-07 Caterpillar Tractor Co Fuel injector
DE2649357A1 (en) * 1976-08-26 1978-03-02 List Hans CYLINDER HEAD FOR INJECTION COMBUSTION MACHINES
DE3445611A1 (en) * 1984-12-14 1986-06-19 Audi AG, 8070 Ingolstadt Applied-ignition injection internal combustion engine
DE3705848A1 (en) * 1987-02-24 1988-09-01 Bosch Gmbh Robert Hydraulic circuit of a fuel injection system
WO1989004919A2 (en) * 1987-11-16 1989-06-01 Siemens-Bendix Automotive Electronics L.P. Pico fuel injector valve
DE3826144A1 (en) * 1988-08-01 1990-02-15 Voest Alpine Automotive Cylinder head of an injection internal combustion engine with a cylinder head cover and pump nozzle

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2091778A5 (en) * 1970-05-22 1972-01-14 Gen Motors Corp
FR2125080A5 (en) * 1971-02-05 1972-09-22 Cav Ltd
US3750960A (en) * 1971-11-05 1973-08-07 Caterpillar Tractor Co Fuel injector
DE2649357A1 (en) * 1976-08-26 1978-03-02 List Hans CYLINDER HEAD FOR INJECTION COMBUSTION MACHINES
DE3445611A1 (en) * 1984-12-14 1986-06-19 Audi AG, 8070 Ingolstadt Applied-ignition injection internal combustion engine
DE3705848A1 (en) * 1987-02-24 1988-09-01 Bosch Gmbh Robert Hydraulic circuit of a fuel injection system
WO1989004919A2 (en) * 1987-11-16 1989-06-01 Siemens-Bendix Automotive Electronics L.P. Pico fuel injector valve
DE3826144A1 (en) * 1988-08-01 1990-02-15 Voest Alpine Automotive Cylinder head of an injection internal combustion engine with a cylinder head cover and pump nozzle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3940222A1 (en) 2020-07-17 2022-01-19 RENAULT s.a.s. Gas fuel injection rail
FR3112574A1 (en) 2020-07-17 2022-01-21 Renault S.A.S Gas heater in injection rail with metal insert
FR3112575A1 (en) 2020-07-17 2022-01-21 Renault S.A.S Gas fuel injection rail.

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Publication number Publication date
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