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EP0983432A1 - Device for fixing a fuel injector on an internal combustion engine cylinder head - Google Patents

Device for fixing a fuel injector on an internal combustion engine cylinder head

Info

Publication number
EP0983432A1
EP0983432A1 EP98966978A EP98966978A EP0983432A1 EP 0983432 A1 EP0983432 A1 EP 0983432A1 EP 98966978 A EP98966978 A EP 98966978A EP 98966978 A EP98966978 A EP 98966978A EP 0983432 A1 EP0983432 A1 EP 0983432A1
Authority
EP
European Patent Office
Prior art keywords
injector
cylinder head
sleeve
flange
fixing
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
EP98966978A
Other languages
German (de)
French (fr)
Other versions
EP0983432B1 (en
Inventor
Didier Girard
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
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0983432A1 publication Critical patent/EP0983432A1/en
Application granted granted Critical
Publication of EP0983432B1 publication Critical patent/EP0983432B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings

Definitions

  • the present invention relates to a device for fixing a fuel injector to an internal combustion engine cylinder head.
  • the invention relates to such a
  • the fixing device is integrated in the cylinder head, in a chamber containing mechanical valve actuating members, and comprises a cylindrical sheath surrounding the body of the injector.
  • the latter is provided, on its central part located in the chamber, with a peripheral groove capable of receiving a rod on which the sheath comes to press down with the help of an internal shoulder to immobilize the injector against the lower bottom of a housing provided in the cylinder head, generally designated injector well.
  • the sleeve extends downward from the shoulder, forming a recess which encloses a protruding part of the cylinder head with the interposition of an O-ring so as to place the body of the injector away from an oil mist in the room.
  • a lip seal Between the upper part of the sheath and a cover of the cylinder head delimiting the chamber is disposed a lip seal ensuring the seal between the chamber and the outside of the cylinder head.
  • the sleeve is fixed to the cylinder head by a fork which bears on two external transverse wings of the sleeve under the action of a threaded piece screwed into the cylinder head.
  • Such a device presents a space in the chamber reducing the volume available for the valves and requires relatively complex and expensive sealing means; moreover, the disassembly of the injector proves to be difficult and a significant overhang above its fixing harms its reliability.
  • the present invention aims to provide a device of the kind described above and which overcomes the aforementioned drawbacks.
  • the subject of the present invention is a device for fixing a fuel injector to an internal combustion engine cylinder head consisting of a so-called lower part capable of covering an engine cylinder and of a so-called upper part. delimiting with the other part a chamber containing mechanical valve actuating members, the injector passing through these two parts and being held in abutment on the bottom of a well of the lower part by a flange fixed by screws to the cylinder head , and by means of a tubular piece which surrounds the body of the injector and bears on a projecting part of a rod mounted in a peripheral groove of the body of the injector, characterized in that the flange is rigidly integral with the tubular part consisting of a sleeve which is fitted into a cylindrical recess in the upper part.
  • the sleeve is provided with a bore in which is fitted the body of the injector and a peripheral groove in which is mounted a seal.
  • the ring consists of a split ring with ends of complementary shapes suitable for sealing between the body of the injector and the bore of the sleeve when said sleeve bears on the ring under the action of the fixed flange on the cylinder head.
  • the sleeve comprises at its lower part a circular base with inclined edges suitable for ensuring the approximation of the ends of the rod.
  • FIG. 1 is a partial view in longitudinal section of the device of the invention for fixing a fuel injector on a cylinder head of an internal combustion engine;
  • FIG. 2 is a partial sectional view along line l l-l l of Figure 1;
  • FIG. 3 is a perspective view of the injector and part of the fixing device
  • FIG. 4 is a perspective view of a flange of the device
  • FIG. 5 is a top view of a rod of the device
  • FIG. 6 is a sectional view, on a larger scale, along the line VI-VI of FIG. 4.
  • the cylinder head 2 comprises on the one hand a so-called lower part 2a intended to cover at least one cylinder of the engine, assumed here to be vertical, and on the other hand a so-called upper part 2b forming a cylinder head cover and an upper half-bearing for at at least one camshaft, not shown, interposed between the two parts 2a and 2b, which define between them a chamber 5 containing mechanical valve control members.
  • the injector 1 comprises a body of generally cylindrical shape, a lower portion 3 of which is housed in a recess 4 called a well formed in the lower part 2a of the cylinder head and emerging from this part in the chamber 5. This is filled, during engine operation, with an oil mist cloud which participates in the lubrication of the mechanical components.
  • the body of the injector 1 has at its lower part a radial shoulder 6 which conventionally bears, with the interposition of a copper sealing washer 7, against the bottom 8 of the well 4.
  • the injector 1 is fixed to the upper part 2b of the cylinder head by means of a fixing flange 9 which consists of a cylindrical sleeve 10 internally having a bore 10a.
  • the sleeve 10 comprises at its upper part, as visible in FIGS. 4 and 6, two transverse symmetrical wings 11 and 12 which are each provided with an orifice, respectively 11a and 12a, allowing the passage of a fixing screw 13 .
  • This sleeve 10 is engaged in a cylindrical housing 14 provided in the upper part 2b and is held to the latter by the fixing screws 13.
  • the body of the injector 1 comprises, in a central portion located above the lower part 2a of the cylinder head, a peripheral groove 15 in which is mounted a rod 16 of elastic metal which partially protrudes from the groove 15 thus forming a circular support area for the flange 9.
  • the rod 16, shown in FIG. 5, consists of a split ring with ends 16a, 16b of complementary shapes capable of ensuring good sealing when they are joined.
  • the sleeve 10 comprises at its lower end a circular base 17 bearing on the projecting part of the rod 16.
  • This support base 17 has a chamfer 17a so as to ensure regular contact on the projecting part of the rod and bring the ends of it closer together when it exerts an axial thrust on it.
  • the outside diameter of the sleeve 10 is provided with a peripheral groove 18 in which an O-ring seal 19 is mounted.
  • the operator engages the body of the injector in the bore 10a of the flange 9 and then places the rod 16 in the peripheral groove 15.
  • the flange 9 is fixed to the upper part 2b by the fixing screws 13, the tightening of which causes a downward push of the flange on the rod 16, therefore on the injector 1 until it is brought into lower support on the bottom 8 of the well 4. This pushing causes the tight junction of the ends of the rod.
  • the wings 11 and 12 of the flange 9 are spaced from an upper face 20 of the upper part 2b, which thus allows elastic recovery by the screws 13 of the forces resulting from different thermal expansions of the injector and of the breech.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The invention concerns a device for fixing a fuel injector on an internal combustion engine cylinder head consisting of a part called bottom part (2a) for covering at least an engine cylinder and a part called top part (2b) defining with the other part a chamber (5) containing mechanical members for actuating valves. The injector (1) passes through these two parts and is supported on the base (8) of a well (4) of the bottom part (2a) by a flange (9) fixed to the cylinder head (13) with screws, and by means of a tubular piece (10) enclosing the injector body and resting on the projecting part of a lock ring (16) mounted in a peripheral groove (15) of the injector body. The invention is characterised in that, the flange (9) is rigidly integral with the tubular piece (10) fitted in a cylindrical recess (14) of the top part (2b).

Description

DISPOSITIF DE FIXATION D'UN INJECTEUR DE CARBURANT SUR UNE CULASSE DE DEVICE FOR FIXING A FUEL INJECTOR TO A CYLINDER HEAD
MOTEUR A COMBUSTION INTERNEINTERNAL COMBUSTION ENGINE
La présente invention concerne un dispositif de fixation d'un injecteur de carburant sur une culasse de moteur à combustion interne.The present invention relates to a device for fixing a fuel injector to an internal combustion engine cylinder head.
Plus particulièrement, l'invention se rapporte à un telMore particularly, the invention relates to such a
? dispositif pour un injecteur traversant à peu près verticalement la culasse en débouchant de celle-ci par une face inférieure couvrant un cylindre du moteur supposé vertical, et en saillant de la culasse par une face supérieure accessible.? device for an injector passing approximately vertically through the cylinder head, emerging from the latter by a lower face covering a cylinder of the engine assumed to be vertical, and projecting from the cylinder head by an accessible upper face.
Dans un agencement connu par le brevet DE 43 15 233, le o dispositif de fixation est intégré dans la culasse, dans une chambre contenant des organes mécaniques d'actionnement de soupapes, et comporte un fourreau cylindrique entourant le corps de l'injecteur.In an arrangement known from patent DE 43 15 233, the fixing device is integrated in the cylinder head, in a chamber containing mechanical valve actuating members, and comprises a cylindrical sheath surrounding the body of the injector.
Ce dernier est pourvu, sur sa partie centrale située dans 5 la chambre, d'une gorge périphérique apte à recevoir un jonc sur lequel vient appuyer vers le bas le fourreau à l'aide d'un épaulement intérieur pour immobiliser l'injecteur contre le fond inférieur d'un logement prévu dans la culasse, désigné généralement puits d'injecteur.The latter is provided, on its central part located in the chamber, with a peripheral groove capable of receiving a rod on which the sheath comes to press down with the help of an internal shoulder to immobilize the injector against the lower bottom of a housing provided in the cylinder head, generally designated injector well.
0 Le fourreau se prolonge vers le bas à partir de l'épaulement en formant un évidement qui vient enserrer une partie saillante de la culasse avec interposition d'un joint torique de manière à placer le corps de l'injecteur à l'abri d'un brouillard d'huile se trouvant dans la chambre. Entre la partie 5 supérieure du fourreau et un couvercle de la culasse délimitant la chambre est disposé un joint à lèvre assurant l'étanchéité entre la chambre et l'extérieur de la culasse.0 The sleeve extends downward from the shoulder, forming a recess which encloses a protruding part of the cylinder head with the interposition of an O-ring so as to place the body of the injector away from an oil mist in the room. Between the upper part of the sheath and a cover of the cylinder head delimiting the chamber is disposed a lip seal ensuring the seal between the chamber and the outside of the cylinder head.
Le fourreau est fixé à la culasse par une fourche qui prend appui sur deux ailes transversales extérieures du o fourreau sous l'action d'une pièce filetée vissée dans la culasse.The sleeve is fixed to the cylinder head by a fork which bears on two external transverse wings of the sleeve under the action of a threaded piece screwed into the cylinder head.
Un tel dispositif présente dans la chambre un encombrement réduisant le volume disponible pour les soupapes et nécessite des moyens d'étanchéité relativement complexes et coûteux; de plus le démontage de l'injecteur s'avère difficile et un porte-à-faux important au dessus de sa fixation nuit à sa fiabilité.Such a device presents a space in the chamber reducing the volume available for the valves and requires relatively complex and expensive sealing means; moreover, the disassembly of the injector proves to be difficult and a significant overhang above its fixing harms its reliability.
La présente invention a pour but de proposer un dispositif du genre de celui décrit ci-dessus et qui remédie aux inconvénients susmentionnés.The present invention aims to provide a device of the kind described above and which overcomes the aforementioned drawbacks.
A cet effet, la présente invention a pour objet un dispositif pour la fixation d'un injecteur de carburant sur une culasse de moteur à combustion interne constituée d'une partie dite inférieure propre à couvrir un cylindre du moteur et d'une partie dite supérieure délimitant avec l'autre partie une chambre contenant des organes mécaniques d'actionnement de soupapes, l'injecteur traversant ces deux parties et étant maintenu en appui sur le fond d'un puits de la partie inférieure par une bride fixée par vis à la culasse, et par l'intermédiaire d'une pièce tubulaire qui entoure le corps de l'injecteur et prend appui sur une partie saillante d'un jonc monté dans une gorge périphérique du corps de l'injecteur, caractérisé en ce que la bride est rigidement solidaire de la pièce tubulaire constituée d'un manchon qui est emmanché dans un évidement cylindrique de la partie supérieure.To this end, the subject of the present invention is a device for fixing a fuel injector to an internal combustion engine cylinder head consisting of a so-called lower part capable of covering an engine cylinder and of a so-called upper part. delimiting with the other part a chamber containing mechanical valve actuating members, the injector passing through these two parts and being held in abutment on the bottom of a well of the lower part by a flange fixed by screws to the cylinder head , and by means of a tubular piece which surrounds the body of the injector and bears on a projecting part of a rod mounted in a peripheral groove of the body of the injector, characterized in that the flange is rigidly integral with the tubular part consisting of a sleeve which is fitted into a cylindrical recess in the upper part.
Selon quelques dispositions intéressantes de l'invention :According to some interesting provisions of the invention:
- le manchon est pourvu d'un alésage dans lequel est emmanché le corps de l'injecteur et d'une gorge périphérique dans laquelle est monté un joint d'étanchéité.- The sleeve is provided with a bore in which is fitted the body of the injector and a peripheral groove in which is mounted a seal.
- le jonc est constitué d'un anneau fendu à extrémités de formes complémentaires propre à assurer l'étanchéité entre le corps de l'injecteur et l'alésage du manchon lorsque ledit manchon prend appui sur le jonc sous l'action de la bride fixée sur la culasse.- the ring consists of a split ring with ends of complementary shapes suitable for sealing between the body of the injector and the bore of the sleeve when said sleeve bears on the ring under the action of the fixed flange on the cylinder head.
- le manchon comprend à sa partie inférieure une base circulaire à bords inclinés propre à assurer le rapprochement des extrémités du jonc. Les caractéristiques de l'invention mentionnées ci-dessus, ainsi que d'autres, apparaîtront plus clairement à la lecture de la description suivante d'un exemple de réalisation, en se référant aux dessins annexés sur lesquels :- The sleeve comprises at its lower part a circular base with inclined edges suitable for ensuring the approximation of the ends of the rod. The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of an exemplary embodiment, with reference to the appended drawings in which:
- la figure 1 est une vue partielle en coupe longitudinale du dispositif de l'invention pour fixer un injecteur de carburant sur une culasse de moteur à combustion interne ;- Figure 1 is a partial view in longitudinal section of the device of the invention for fixing a fuel injector on a cylinder head of an internal combustion engine;
- la figure 2 est une vue en coupe partielle suivant la ligne l l-l l de la figure 1 ;- Figure 2 is a partial sectional view along line l l-l l of Figure 1;
- la figure 3 est une vue en perspective de l'injecteur et d'une partie du dispositif de fixation ;- Figure 3 is a perspective view of the injector and part of the fixing device;
- la figure 4 est une vue en perspective d'une bride du dispositif;- Figure 4 is a perspective view of a flange of the device;
- la figure 5 est une vue de dessus d'un jonc du dispositif;- Figure 5 is a top view of a rod of the device;
- la figure 6 est une vue en coupe, à plus grande échelle, suivant la ligne VI-VI de la figure 4.FIG. 6 is a sectional view, on a larger scale, along the line VI-VI of FIG. 4.
On voit sur les figures 1 et 2, un injecteur 1 de carburant traversant une culasse 2 d'un moteur à combustion interne et maintenu sur elle par un dispositif de fixation D.We see in Figures 1 and 2, a fuel injector 1 passing through a cylinder head 2 of an internal combustion engine and held thereon by a fixing device D.
La culasse 2 comprend d'une part une partie dite inférieure 2a destinée à couvrir au moins un cylindre du moteur, supposé ici vertical, et d'autre part une partie dite supérieure 2b formant un couvre-culasse et un demi-palier supérieur pour au moins un arbre à cames, non représenté, interposé entre les deux parties 2a et 2b, qui délimitent entre elles une chambre 5 contenant des organes mécaniques de commande de soupapes.The cylinder head 2 comprises on the one hand a so-called lower part 2a intended to cover at least one cylinder of the engine, assumed here to be vertical, and on the other hand a so-called upper part 2b forming a cylinder head cover and an upper half-bearing for at at least one camshaft, not shown, interposed between the two parts 2a and 2b, which define between them a chamber 5 containing mechanical valve control members.
L'injecteur 1 comporte un corps de forme générale cylindrique dont une portion 3 inférieure est logée dans un evidement 4 dit puits formé dans la partie inférieure 2a de la culasse et débouchant de cette partie dans la chambre 5. Celle-ci est remplie, lors du fonctionnement du moteur, d'un nuage de brouillard d'huile qui participe à la lubrification des organes mécaniques.The injector 1 comprises a body of generally cylindrical shape, a lower portion 3 of which is housed in a recess 4 called a well formed in the lower part 2a of the cylinder head and emerging from this part in the chamber 5. This is filled, during engine operation, with an oil mist cloud which participates in the lubrication of the mechanical components.
Le corps de l'injecteur 1 possède à sa partie inférieure un épaulement radial 6 qui prend classiquement appui, avec interposition d'une rondelle 7 d'étanchéité en cuivre, contre le fond 8 du puits 4.The body of the injector 1 has at its lower part a radial shoulder 6 which conventionally bears, with the interposition of a copper sealing washer 7, against the bottom 8 of the well 4.
Selon la présente invention l'injecteur 1 est fixé sur la partie supérieure 2b de la culasse à l'aide d'une bride 9 de fixation qui est constituée d'un manchon 10 cylindrique comportant intérieurement un alésage 10a.According to the present invention, the injector 1 is fixed to the upper part 2b of the cylinder head by means of a fixing flange 9 which consists of a cylindrical sleeve 10 internally having a bore 10a.
Le manchon 10 comprend à sa partie supérieure, comme visible sur les figures 4 et 6, deux ailes 11 et 12 symétriques transversales qui sont pourvues chacune d'un orifice, respectivement 11 a et 12a, permettant le passage d'une vis de fixation 13.The sleeve 10 comprises at its upper part, as visible in FIGS. 4 and 6, two transverse symmetrical wings 11 and 12 which are each provided with an orifice, respectively 11a and 12a, allowing the passage of a fixing screw 13 .
Ce manchon 10 est engagé dans un logement cylindrique 14 prévu dans la partie supérieure 2b et est maintenu à cette dernière par les vis de fixation 13.This sleeve 10 is engaged in a cylindrical housing 14 provided in the upper part 2b and is held to the latter by the fixing screws 13.
Le corps de l'injecteur 1 comprend, dans une portion centrale située au dessus de la partie inférieure 2a de la culasse, une gorge périphérique 15 dans laquelle est monté un jonc 16 en métal élastique qui fait saillie partiellement de la gorge 15 en formant ainsi une zone d'appui circulaire pour la bride 9.The body of the injector 1 comprises, in a central portion located above the lower part 2a of the cylinder head, a peripheral groove 15 in which is mounted a rod 16 of elastic metal which partially protrudes from the groove 15 thus forming a circular support area for the flange 9.
Le jonc 16, représenté à la figure 5, est constitué d'un anneau fendu à extrémités 16a, 16b de formes complémentaires propres à assurer une bonne étanchéité lorsqu'elles sont jointes.The rod 16, shown in FIG. 5, consists of a split ring with ends 16a, 16b of complementary shapes capable of ensuring good sealing when they are joined.
Le manchon 10 comprend à son extrémité inférieure une base circulaire 17 venant en appui sur la partie en saillie du jonc 16. Cette base d'appui 17 comporte un chanfrein 17a de manière à assurer un contact régulier sur la partie saillante du jonc et à rapprocher les extrémités de celui-ci quand elle exerce sur lui une poussée axiale.The sleeve 10 comprises at its lower end a circular base 17 bearing on the projecting part of the rod 16. This support base 17 has a chamfer 17a so as to ensure regular contact on the projecting part of the rod and bring the ends of it closer together when it exerts an axial thrust on it.
Le diamètre extérieur du manchon 10 est pourvu d'une gorge périphérique 18 dans laquelle est monté un joint torique d'étanchéité 19.The outside diameter of the sleeve 10 is provided with a peripheral groove 18 in which an O-ring seal 19 is mounted.
La fixation d'un injecteur 1 sur la culasse 2 à l'aide de la bride 9 s'effectue de la manière suivante, les deux parties 2a, 2b de la culasse étant préalablement assemblées.The attachment of an injector 1 to the cylinder head 2 using the flange 9 is carried out as follows, the two parts 2a, 2b of the cylinder head being previously assembled.
Lors d'une première opération, l'opérateur engage le corps de l'injecteur dans l'alésage 10a de la bride 9 puis dispose le jonc 16 dans la gorge périphérique 15.During a first operation, the operator engages the body of the injector in the bore 10a of the flange 9 and then places the rod 16 in the peripheral groove 15.
L'opérateur introduit ensuite la portion inférieure du corps de l' injecteur dans l'évidement 4 de la partie inférieure 2a de la culasse, introduisant également la bride 9 et le joint d'étanchéité 19 associé dans le logement 14 de la partie supérieure 2b.The operator then introduces the lower portion of the injector body into the recess 4 in the lower part 2a of the cylinder head, also introducing the flange 9 and the associated seal 19 in the housing 14 of the upper part 2b .
Enfin, la bride 9 est fixée à la partie supérieure 2b par les vis de fixation 13 dont le serrage provoque une poussée vers le bas de la bride sur le jonc 16, donc sur l' injecteur 1 jusqu'à sa mise en appui inférieur sur le fond 8 du puits 4. Cette poussée provoque la jonction étanche des extrémités du jonc.Finally, the flange 9 is fixed to the upper part 2b by the fixing screws 13, the tightening of which causes a downward push of the flange on the rod 16, therefore on the injector 1 until it is brought into lower support on the bottom 8 of the well 4. This pushing causes the tight junction of the ends of the rod.
On notera que les ailes 11 et 12 de la bride 9 sont espacées d'une face supérieure 20 de la partie supérieure 2b, ce qui permet ainsi une reprise élastique par les vis 13 des efforts résultant des dilatations thermiques différentes de l'injecteur et de la culasse.It will be noted that the wings 11 and 12 of the flange 9 are spaced from an upper face 20 of the upper part 2b, which thus allows elastic recovery by the screws 13 of the forces resulting from different thermal expansions of the injector and of the breech.
Un tel dispositif selon l'invention a pour avantage de présenter un encombrement réduit dans la chambre 5 autour de l'injecteur et d'assurer une bonne étanchéité de la chambre 5 contenant le brouillard d'huile, tout en étant simple à réaliser et peu coûteux. De plus, cette disposition permet de réaliser, par le manchon de la bride, un maintien stable de l'injecteur, à proximité de sa tête 21 et donc des commandes qui lui sont associées, réduisant ainsi l'habituel porte-à-faux supérieur nuisible à la fiabilité de l'injecteur. The advantage of such a device according to the invention is that it takes up less space in the chamber 5 around the injector and ensures good sealing of the chamber 5 containing the oil mist, while being simple to perform and little expensive. In addition, this arrangement makes it possible to achieve, by the flange sleeve, a stable hold of the injector, near its head 21 and therefore of the controls associated with it, thus reducing the usual upper overhang. detrimental to the reliability of the injector.

Claims

R E V E N D I C A T I O N S
1 . Dispositif de fixation d'un injecteur de carburant sur une culasse de moteur à combustion interne constituée d'une partie dite inférieure (2a) propre à couvrir au moins un cylindre du moteur et d'une partie dite supérieure (2b) délimitant avec l'autre partie une chambre (5) contenant des organes mécaniques d'actionnement de soupapes, l'injecteur (1 ) traversant ces deux parties et étant maintenu en appui sur le fond (8) d'un puits (4) de la partie inférieure (2a) par une bride (9) fixée par vis ( 13) à la culasse, et par l'intermédiaire d'une pièce tubulaire (10) qui entoure le corps de l'injecteur et prend appui sur une partie saillante d'un jonc (16) monté dans une gorge périphérique ( 15) du corps de l'injecteur, caractérisé en ce que la bride (9) est rigidement solidaire de la pièce tubulaire constituée d'un manchon ( 10) qui est emmanché dans un evidement cylindrique ( 14) de la partie supérieure (2b).1. Device for fixing a fuel injector to an internal combustion engine cylinder head consisting of a so-called lower part (2a) capable of covering at least one cylinder of the engine and of a so-called upper part (2b) delimiting with the other part a chamber (5) containing mechanical valve actuating members, the injector (1) passing through these two parts and being held in abutment on the bottom (8) of a well (4) of the lower part ( 2a) by a flange (9) fixed by screws (13) to the cylinder head, and by means of a tubular piece (10) which surrounds the body of the injector and bears on a projecting part of a rod (16) mounted in a peripheral groove (15) of the body of the injector, characterized in that the flange (9) is rigidly secured to the tubular part consisting of a sleeve (10) which is fitted into a cylindrical recess ( 14) of the upper part (2b).
2. Dispositif de fixation selon la revendication 1 , caractérisé en ce que le manchon (10) est pourvu d'un alésage (10a) dans lequel est emmanché le corps de l'injecteur (1 ) et d'une gorge périphérique (18) dans laquelle est monté un joint d'étanchéité (19).2. Fastening device according to claim 1, characterized in that the sleeve (10) is provided with a bore (10a) in which is fitted the body of the injector (1) and a peripheral groove (18) in which is mounted a seal (19).
3. Dispositif de fixation selon l'une quelconque des revendications précédentes, caractérisé en ce que le jonc (16) est constitué d'un anneau fendu à extrémités ( 16a, 16b) de formes complémentaires propre à assurer l'étanchéité entre le corps de l'injecteur et l'alésage du manchon lorsque ledit manchon (10) prend appui sur le jonc sous l'action de la bride (9) fixée sur la culasse. 3. Fastening device according to any one of the preceding claims, characterized in that the rod (16) consists of a split ring with ends (16a, 16b) of complementary shapes suitable for sealing between the body of the injector and the bore of the sleeve when said sleeve (10) bears on the rod under the action of the flange (9) fixed on the cylinder head.
4. Dispositif de fixation selon la revendication 3, caractérisé en ce que le manchon (10) comprend à sa partie inférieure une base circulaire (17) à bords inclinés (17a) propres à assurer le rapprochement des extrémités (16a, 16b) du jonc (16). 4. Fastening device according to claim 3, characterized in that the sleeve (10) comprises at its lower part a circular base (17) with inclined edges (17a) suitable for ensuring the approximation of the ends (16a, 16b) of the rod (16).
EP98966978A 1997-04-10 1998-04-08 Device for fixing a fuel injector on an internal combustion engine cylinder head Expired - Lifetime EP0983432B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9704382 1997-04-10
FR9704382A FR2762051B1 (en) 1997-04-10 1997-04-10 DEVICE FOR FIXING A FUEL INJECTOR TO A CYLINDER HEAD OF AN INTERNAL COMBUSTION ENGINE
PCT/FR1998/000704 WO1998045595A1 (en) 1997-04-10 1998-04-08 Device for fixing a fuel injector on an internal combustion engine cylinder head

Publications (2)

Publication Number Publication Date
EP0983432A1 true EP0983432A1 (en) 2000-03-08
EP0983432B1 EP0983432B1 (en) 2004-10-06

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EP98966978A Expired - Lifetime EP0983432B1 (en) 1997-04-10 1998-04-08 Device for fixing a fuel injector on an internal combustion engine cylinder head

Country Status (9)

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US (1) US6116219A (en)
EP (1) EP0983432B1 (en)
JP (1) JP4062451B2 (en)
CN (1) CN1083937C (en)
BR (1) BR9804824A (en)
DE (1) DE69826855T2 (en)
ES (1) ES2227909T3 (en)
FR (1) FR2762051B1 (en)
WO (1) WO1998045595A1 (en)

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Also Published As

Publication number Publication date
ES2227909T3 (en) 2005-04-01
CN1222954A (en) 1999-07-14
JP2000512712A (en) 2000-09-26
US6116219A (en) 2000-09-12
FR2762051B1 (en) 1999-05-21
FR2762051A1 (en) 1998-10-16
CN1083937C (en) 2002-05-01
JP4062451B2 (en) 2008-03-19
EP0983432B1 (en) 2004-10-06
DE69826855D1 (en) 2004-11-11
DE69826855T2 (en) 2005-11-17
BR9804824A (en) 2000-01-25
WO1998045595A1 (en) 1998-10-15

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