WO2014053725A1 - Flange for fastening at least one injector to a cylinder head of a combustion engine - Google Patents

Flange for fastening at least one injector to a cylinder head of a combustion engine Download PDF

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Publication number
WO2014053725A1
WO2014053725A1 PCT/FR2013/052130 FR2013052130W WO2014053725A1 WO 2014053725 A1 WO2014053725 A1 WO 2014053725A1 FR 2013052130 W FR2013052130 W FR 2013052130W WO 2014053725 A1 WO2014053725 A1 WO 2014053725A1
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WO
WIPO (PCT)
Prior art keywords
flange
injector
fork
cylindrical portion
cylinder head
Prior art date
Application number
PCT/FR2013/052130
Other languages
French (fr)
Inventor
Didier Girard
Original Assignee
Peugeot Citroen Automobiles 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 Peugeot Citroen Automobiles Sa filed Critical Peugeot Citroen Automobiles Sa
Priority to EP13789606.4A priority Critical patent/EP2909468A1/en
Priority to CN201380051606.1A priority patent/CN104718372B/en
Publication of WO2014053725A1 publication Critical patent/WO2014053725A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/855—Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws

Definitions

  • the invention relates to a flange for fixing at least one injector on a motor vehicle engine cylinder head.
  • the fixing flange carries an injector disposed at each of its ends.
  • an injector is generally of substantially cylindrical shape. It can also be arranged in an injector holder wrapping it, the injector holder also being of cylindrical shape.
  • the injector has a first portion disposed above the upper surface of a heat engine closed by a cylinder head, this first part being fixed to the cylinder head of the engine.
  • the first part of the injector extends substantially perpendicularly to the plane of the cylinder head.
  • the injector also has a second penetrating part inside the heat engine. Towards the end of the second part of the injector having penetrated into the engine, there is provided an injection device intended to be introduced into the combustion chamber of the engine. The injection device releases one or more separate jets of fuel into the chamber, where appropriate the jets are regularly spaced from each other around the axis of revolution of the injector.
  • the body of the fastening flange may also have a recess which receives a fastening element of the screw type attaching to the cylinder head, which allows a firm hold of the entire flange and injector relative at the breech.
  • this recess is advantageously provided at the other end of the flange as the one carrying the injector, the flange being substantially elongated.
  • the recess is advantageously provided in the middle part of the flange.
  • the upper surface of the cylinder head is generally very crowded with a lack of space for the various elements that it carries.
  • fixation abuts against an element carried by the upper surface of the cylinder head, for example the camshaft holder or the flange of a neighboring injector.
  • a flange advantageously of symmetrical shape, then has at each of these ends a fork partially surrounding the circumference of a respective injector, each of the injectors being provided with flats, the recess for the passage of the fastening means of the screw type to the breech being provided, as previously mentioned in the middle part of the flange.
  • US-A-7 334 572 discloses such a flange for two injectors with a central portion having a recess for the passage of a fastening means and a U-shaped fork at each end thereof to facilitate sliding engagement of the flange, the inside of each fork cooperating with diametrically opposed flats provided on each of the injectors.
  • the spacing between the ends of the U of a fork and the semicircular portion of the other fork forming the base of the U is predetermined in order to facilitate the disengagement of one of the injectors without causing rotation or release of the other injector.
  • the problem to be solved by the present invention is to design a fastening flange that effectively performs its role of maintaining at least one injector while being easily inserted between the elements already present on the upper surface. of the breech.
  • the present invention provides a clamp for attaching at least one injector to a cylinder head of the engine, the flange comprising a fork at at least one of its ends surrounding at least partially by bearing against the injector, characterized in that the fork has an outer periphery forming a stepped cylinder comprising a first cylindrical portion disposed below a second cylindrical portion, the diameter of the first cylindrical portion being smaller than the diameter of the second cylindrical portion.
  • the technical effect is to obtain a fastening flange having a smaller footprint and can be implemented without interfering with elements on the upper surface of the cylinder head or the housing.
  • a recess passing through the flange, this recess receiving a fastening means solidarisant the flange with the cylinder head of the engine, via a stepped pin.
  • the fork of the flange internally has projecting shapes for cooperating with flats provided on the injector.
  • the inner periphery of the fork has a substantially circular bottom extended on each of the inner sides by a straight portion each carrying a projecting shape.
  • the projecting shapes are at the level of the first cylindrical portion.
  • the fixing flange comprises a fork at each of its ends, each of the forks receiving a respective injector.
  • this recess is disposed in the middle part of the flange.
  • the median portion of the flange is at a level raised relative to its ends carrying a respective fork.
  • the invention also relates to an assembly formed of at least one injector and such a fastening flange.
  • the invention relates to a cylinder head of a heat engine having at least one element at its upper surface and at least one such assembly formed of an injector and a fixing flange, a portion of the injector passing through said cylinder head. , characterized in that the height of the first cylindrical portion of one or each fork of the fastening flange as well as its diameter are chosen according to the configuration of the yoke and said at least one element carried by the yoke, so that the flange does not interfere with said at least one element when in place for clamping said at least one injector.
  • FIG. 1 is a schematic representation of a perspective view of two injectors having between them a fixing flange according to the present invention
  • FIG. 2 is a schematic representation of a lateral perspective view of a fastening flange according to the present invention, this fastening flange being enlarged with respect to FIG. 1,
  • FIG. 3 is a schematic representation of a longitudinal sectional view of an injector provided with a fastening flange according to the present invention, the injector then being secured to the engine and passing through partially.
  • FIG. 1 there is shown a flange 1 having a fork at each of its longitudinal ends, each fork being preferably U-shaped.
  • Each of the forks 2 receives an injector 3 or injector holder.
  • Each injector 3 comprises a main body 3a of cylindrical shape extending substantially along a vertical axis in the mounted position of the injector 3 on the cylinder head of the engine.
  • the main body 3a of the injector comprises a lower fuel injection end 4 inside the engine and an upper part 5, under which comes support the respective fork 2 of the flange 1, this advantageously as close as possible to the upper face of the yoke, not shown in this figure but visible in Figure 3, to avoid any risk of buckling.
  • the lower end 4 of the injector 3 opens into a combustion chamber by sending at least one jet of fuel.
  • the upper part 5 of the injector 3 comprises an electrical connector 15 and a return nozzle 6 of fuel. It also comprises a high pressure injection head 7 located in a central zone of this upper part.
  • the fastening flange 1 shown in particular in Figures 1 and 2 is preferably elongated with two branches each carrying a fork 2 at their free end.
  • the two branches of the flange 1 are substantially of equivalent dimensions as the forks 2, the flange 1 thus having a symmetrical profile.
  • a recess 8 for receiving a fastening means 16 of the flange 1 with the yoke.
  • the fastening means 16 advantageously cooperates by screwing with the stud 9 provided with a shoulder 9a and screwed onto the yoke 13.
  • the shoulder 9a makes it possible to maintain the camshaft holder which is situated above the yoke 13, on it.
  • the fastening means 16 may have a flange 9a which is applied against the upper surface of the yoke and cooperates with a shoulder pin 9 at its upper part.
  • the internal shape of the recess 8 is chosen to allow a centering of the flange 1 relative to the fastening means 16 during the clamping of said means 16.
  • the bottom of the recess 8 may be in the form of a spherical cap forming a reception seat for the lower part of the head of the fastening means 16, in order to ensure accurate centering of the median part of the flange 1 and to avoid an offset side of the flange 1 when clamping the fastening means 16, this shift being transmitted to the positioning of the injectors 3 in their respective fork 2.
  • Each of the forks 2 has an inner periphery of substantially cylindrical shape open or preferably U and surrounds each injector on a little more than half of the circumference of the body 3a of the injector 3.
  • the inner periphery of the forks 2 advantageously carries projecting shapes 10 cooperating with the flats 10a provided on the part opposite the respective injector 3, part which is introduced into the fork 2.
  • the cylindrical body 3a of each injector 3 is indexed in rotation in the respective fork 2 of the flange 1.
  • the opening of each fork 2 advantageously has a substantially circular bottom portion extended towards the free ends of the opening by substantially straight portions carrying the projecting shapes 10, these substantially straight portions being parallel to each other.
  • each fork 2 has an outer periphery forming a stepped cylinder.
  • the stepped cylinder comprises a first cylindrical portion 1 1 disposed below a second cylindrical portion 12, the diameter of the first cylindrical portion 1 1 being smaller than the diameter of the second cylindrical portion 12.
  • the height of the first cylindrical portion 1 1 and its diameter are chosen according to the configuration of the cylinder head and the elements carried by the cylinder head near the injector 3, so that the flange 1 does not interfere with these elements when in place for the clamping of the injector 3 or when placing the assembly formed by the flange 1 and at least one injector 3, preferably two injectors 3.
  • the projecting shapes 10 presented by the inner periphery of each of the forks 2 are at the level of the first cylindrical portion 1 1 and do not exceed the level of the junction between the first cylindrical portion 1 1 and the second portion. cylindrical 12.
  • the body of the flange 1 between the two forks 2 may be slightly inclined with the ends of the body of the flange 1 carrying the forks 2 arranged at a lower level than the middle portion of the flange 1 through the recess 8 .
  • Figure 3 shows an injector 3 of a group of two injectors connected to each other by the flange 1 according to the present invention, the flange 1 being fixed to the upper surface 13 of a cylinder head, as shown in FIG. previously mentioned.
  • the upper surface 13 of the cylinder head carries various elements 14 which could interfere with a flange of the state of the art, which no longer occurs with the flange 1 of the present invention.
  • the yoke supports two camshaft holders 14, a respective portion of which is close to the fork 2 of the flange 1 receiving inside its body 3a of the injector 3.
  • the outer wall of the fork 2 is stepped by having two cylindrical portions 11 and 12 of different diameter, with the first cylindrical portion 11 of smaller diameter being closest to the upper face 13 of the breech, this first cylindrical portion 1 1 does not interfere with the respective parts of the two camshaft holders 14, which would not be the case of the second cylindrical portion 12 if it replaced the first cylindrical portion January 1.
  • the mounting flange according to the present invention allows the use without modification of a standard injector, which represents a reduced cost of implementation. Fixing the flange is performed closer to the bearing face of the injector, which reduces the risk of buckling. The injector is clamped perpendicularly to its bearing face, which reduces the tightening torque losses.
  • the fixing flange according to the invention has a reduced size due to the presence of a stepped cylinder to each of his or her end of the forks. It is the same for the size of the injector that does not need to be raised relative to the cylinder head. With such a flange, there is, for example, no impact on the measures concerning the pedestrian impact or the position of the cover.
  • the sliding flange according to the present invention is currently the only possible solution for fixing injectors having fastening flats on some of the reduced height cylinder architecture, for example a 16-valve cylinder head architecture.

Abstract

The invention concerns a flange for fastening at least one injector to a cylinder head of a motor vehicle combustion engine. The flange (1) is characterised in that the fork (2) of same has an outer periphery forming a stepped cylinder comprising a first cylindrical portion (11) arranged beneath a second cylindrical portion (12), the diameter of the first cylindrical portion (11) being smaller than the diameter of the second cylindrical portion (12). The invention can be applied in the motor vehicle industry.

Description

BRIDE POUR LA FIXATION D'AU MOINS UN INJECTEUR SUR FLANGE FOR FIXING AT LEAST ONE INJECTOR ON
UNE CULASSE DE MOTEUR THERMIQUE A THERMAL MOTOR CYLINDER HEAD
[0001 ] L'invention porte sur une bride pour la fixation d'au moins un injecteur sur une culasse de moteur thermique de véhicule automobile. Avantageusement, la bride de fixation porte un injecteur disposé à chacune de ses extrémités.  The invention relates to a flange for fixing at least one injector on a motor vehicle engine cylinder head. Advantageously, the fixing flange carries an injector disposed at each of its ends.
[0002] De manière classique, un injecteur est généralement de forme sensiblement cylindrique. Il peut aussi être disposé dans un porte-injecteur l'enveloppant, le porte- injecteur étant lui aussi de forme cylindrique. L'injecteur présente une première partie disposée au-dessus de la surface supérieure d'un moteur thermique fermé par une culasse, cette première partie étant fixée à la culasse du moteur thermique. La première partie de l'injecteur s'étend sensiblement perpendiculairement au plan de la culasse.  [0002] Conventionally, an injector is generally of substantially cylindrical shape. It can also be arranged in an injector holder wrapping it, the injector holder also being of cylindrical shape. The injector has a first portion disposed above the upper surface of a heat engine closed by a cylinder head, this first part being fixed to the cylinder head of the engine. The first part of the injector extends substantially perpendicularly to the plane of the cylinder head.
[0003] L'injecteur présente aussi une seconde partie pénétrant à l'intérieur du moteur thermique. Vers l'extrémité de la seconde partie de l'injecteur ayant pénétré dans le moteur thermique, il est prévu un dispositif d'injection destiné à être introduit dans la chambre de combustion du moteur. Le dispositif d'injection libère un ou plusieurs jets distincts de carburant dans la chambre, le cas échéant les jets étant régulièrement espacés les uns des autres autour de l'axe de révolution de l'injecteur.  The injector also has a second penetrating part inside the heat engine. Towards the end of the second part of the injector having penetrated into the engine, there is provided an injection device intended to be introduced into the combustion chamber of the engine. The injection device releases one or more separate jets of fuel into the chamber, where appropriate the jets are regularly spaced from each other around the axis of revolution of the injector.
[0004] Ceci implique de maintenir en position l'injecteur par rapport à la culasse. Ceci est fait selon l'état de la technique en prévoyant une bride présentant une extrémité en forme de fourchette qui vient s'engager autour de la première partie du corps de l'injecteur ou du porte-injecteur. Afin d'empêcher la rotation de l'injecteur par rapport à la fourchette de l'injecteur, il est connu de prévoir sur la périphérie extérieure de l'injecteur des méplats coopérant avec l'intérieur de la fourchette pour assurer l'indexage en rotation de l'injecteur.  This involves maintaining in position the injector relative to the cylinder head. This is done according to the state of the art by providing a flange having a fork-shaped end which engages around the first part of the body of the injector or the injector holder. In order to prevent rotation of the injector relative to the fork of the injector, it is known to provide on the outer periphery of the injector flats cooperating with the inside of the fork to ensure rotational indexing. of the injector.
[0005] D'autre part, le corps de la bride de fixation peut aussi présenter un évidement qui reçoit un élément de fixation du type vis se fixant sur la culasse, ce qui permet un maintien ferme de l'ensemble bride et injecteur par rapport à la culasse. Pour une bride de fixation ne portant qu'un injecteur, cet évidement est avantageusement prévu à l'autre extrémité de la bride que celle portant l'injecteur, la bride étant sensiblement longiforme. Pour une bride de fixation longiforme portant un injecteur à chacune de ses extrémités, l'évidement est avantageusement prévu dans la partie médiane de la bride.  On the other hand, the body of the fastening flange may also have a recess which receives a fastening element of the screw type attaching to the cylinder head, which allows a firm hold of the entire flange and injector relative at the breech. For a fastening flange carrying only one injector, this recess is advantageously provided at the other end of the flange as the one carrying the injector, the flange being substantially elongated. For a longiform mounting flange carrying an injector at each of its ends, the recess is advantageously provided in the middle part of the flange.
[0006] Les culasses étant de plus en plus rendues compactes, la surface supérieure de la culasse est généralement très encombrée avec un manque de place pour les divers éléments qu'elle porte. De ce fait, selon le modèle de culasse, il se peut que la bride de fixation bute contre un élément porté par la surface supérieure de la culasse, par exemple le porte-arbre à cames ou la bride d'un injecteur voisin. The cylinder heads being more and more compacted, the upper surface of the cylinder head is generally very crowded with a lack of space for the various elements that it carries. As a result, depending on the breech model, it is possible that fixation abuts against an element carried by the upper surface of the cylinder head, for example the camshaft holder or the flange of a neighboring injector.
[0007] Pour éviter à la bride de buter contre un porte-arbre à cames, il a été proposé de remonter l'injecteur et donc de placer la bride au-dessus du porte-arbre à cames. Ceci a un impact sur la hauteur du moteur en accroissant cette hauteur par exemple de 20 mm. De plus, cela éloigne le dispositif d'injection de l'injecteur de la chambre de combustion ce qui n'est pas souhaitable.  To prevent the flange from abutting against a camshaft holder, it has been proposed to reassemble the injector and thus to place the flange above the camshaft holder. This has an impact on the height of the motor by increasing this height for example by 20 mm. In addition, it removes the injection device from the injector of the combustion chamber which is not desirable.
[0008] Afin d'éviter les interférences entre les brides de deux injecteurs voisins, il a aussi été proposé d'utiliser la même bride pour les deux injecteurs. Une telle bride, avantageusement de forme symétrique, présente alors à chacune des ces extrémités une fourchette entourant partiellement la circonférence d'un injecteur respectif, chacun des injecteurs étant muni de méplats, l'évidement pour le passage du moyen de fixation du type vis à la culasse étant prévu, comme précédemment mentionné dans la partie médiane de la bride.  In order to avoid interference between the flanges of two adjacent injectors, it has also been proposed to use the same flange for the two injectors. Such a flange, advantageously of symmetrical shape, then has at each of these ends a fork partially surrounding the circumference of a respective injector, each of the injectors being provided with flats, the recess for the passage of the fastening means of the screw type to the breech being provided, as previously mentioned in the middle part of the flange.
[0009] Le document US-A-7 334 572 décrit une telle bride pour deux injecteurs avec une portion centrale présentant un évidement pour le passage d'un moyen de fixation et une fourchette en forme de U à chacune de ses extrémités afin de faciliter un engagement de la bride par coulissement, l'intérieur de chaque fourchette coopérant avec des méplats diamétralement opposés prévus sur chacun des injecteurs. L'écartement entre les extrémités du U d'une fourchette et la portion semi-circulaire de l'autre fourchette formant la base du U est prédéterminé afin de faciliter le désengagement d'un des injecteurs sans provoquer la rotation ou la libération de l'autre injecteur.  US-A-7 334 572 discloses such a flange for two injectors with a central portion having a recess for the passage of a fastening means and a U-shaped fork at each end thereof to facilitate sliding engagement of the flange, the inside of each fork cooperating with diametrically opposed flats provided on each of the injectors. The spacing between the ends of the U of a fork and the semicircular portion of the other fork forming the base of the U is predetermined in order to facilitate the disengagement of one of the injectors without causing rotation or release of the other injector.
[0010] Si une telle bride résout le problème d'interférence entre deux brides associées à un injecteur respectif voisin, elle ne permet pas de résoudre le problème d'interférence de la bride au niveau de sa ou ses fourchettes avec un élément porté par la face supérieure de la culasse.  If such a flange solves the problem of interference between two flanges associated with a respective adjacent injector, it does not solve the problem of interference of the flange at its or its forks with an element carried by the upper face of the breech.
[001 1 ] Par conséquent, le problème à résoudre par la présente invention est de concevoir une bride de fixation qui remplisse efficacement son rôle de maintien d'au moins un injecteur tout en pouvant être insérée facilement entre les éléments déjà présents sur la surface supérieure de la culasse.  [001 1] Therefore, the problem to be solved by the present invention is to design a fastening flange that effectively performs its role of maintaining at least one injector while being easily inserted between the elements already present on the upper surface. of the breech.
[0012] A cet effet, la présente invention prévoit une bride de fixation d'au moins un injecteur à une culasse de moteur thermique, la bride comprenant une fourchette à au moins une de ses extrémités entourant au moins partiellement en venant en appui contre l'injecteur, caractérisée en ce que la fourchette présente une périphérie extérieure formant un cylindre étagé comprenant une première portion cylindrique disposée en dessous d'une seconde portion cylindrique, le diamètre de la première portion cylindrique étant plus faible que le diamètre de la seconde portion cylindrique. For this purpose, the present invention provides a clamp for attaching at least one injector to a cylinder head of the engine, the flange comprising a fork at at least one of its ends surrounding at least partially by bearing against the injector, characterized in that the fork has an outer periphery forming a stepped cylinder comprising a first cylindrical portion disposed below a second cylindrical portion, the diameter of the first cylindrical portion being smaller than the diameter of the second cylindrical portion.
[0013] L'effet technique est l'obtention d'une bride de fixation présentant un encombrement moindre et pouvant être mise en place sans interférer avec des éléments se trouvant sur la surface supérieure de la culasse ou du carter. The technical effect is to obtain a fastening flange having a smaller footprint and can be implemented without interfering with elements on the upper surface of the cylinder head or the housing.
[0014] Avantageusement, il est prévu un évidement traversant la bride, cet évidement recevant un moyen de fixation solidarisant la bride avec la culasse du moteur thermique, par l'intermédiaire d'un goujon épaulé. Advantageously, there is provided a recess passing through the flange, this recess receiving a fastening means solidarisant the flange with the cylinder head of the engine, via a stepped pin.
[0015] Avantageusement, la fourchette de la bride présente intérieurement des formes en saillie destinées à coopérer avec des méplats prévus sur l'injecteur. Advantageously, the fork of the flange internally has projecting shapes for cooperating with flats provided on the injector.
[0016] Avantageusement, la périphérie interne de la fourchette présente un fond sensiblement circulaire prolongé sur chacun des côtés internes par une partie droite portant chacune une forme en saillie. Advantageously, the inner periphery of the fork has a substantially circular bottom extended on each of the inner sides by a straight portion each carrying a projecting shape.
[0017] Avantageusement, les formes en saillie sont au niveau de la première portion cylindrique. Advantageously, the projecting shapes are at the level of the first cylindrical portion.
[0018] Avantageusement, la bride de fixation comprend une fourchette à chacune de ses extrémités, chacune des fourchettes recevant un injecteur respectif. Advantageously, the fixing flange comprises a fork at each of its ends, each of the forks receiving a respective injector.
[0019] Avantageusement, quand la bride de fixation présente un évidement, cet évidement est disposé dans la partie médiane de la bride. Advantageously, when the fixing flange has a recess, this recess is disposed in the middle part of the flange.
[0020] Avantageusement, la partie médiane de la bride se trouve à un niveau surélevé par rapport à ses extrémités portant une fourchette respective. [0021 ] L'invention concerne aussi un ensemble formé d'au moins un injecteur et d'une telle bride de fixation. Advantageously, the median portion of the flange is at a level raised relative to its ends carrying a respective fork. The invention also relates to an assembly formed of at least one injector and such a fastening flange.
[0022] L'invention concerne enfin une culasse de moteur thermique présentant au moins un élément à sa surface supérieure et au moins un tel ensemble formé d'un injecteur et d'une bride de fixation, une partie de l'injecteur traversant ladite culasse, caractérisée en ce que la hauteur de la première portion cylindrique d'une ou de chaque fourchette de la bride de fixation de même que son diamètre sont choisis selon la configuration de la culasse et dudit au moins un élément porté par la culasse, afin que la bride n'interfère pas avec ledit au moins un élément quand mise en place pour le bridage dudit au moins un injecteur. Finally, the invention relates to a cylinder head of a heat engine having at least one element at its upper surface and at least one such assembly formed of an injector and a fixing flange, a portion of the injector passing through said cylinder head. , characterized in that the height of the first cylindrical portion of one or each fork of the fastening flange as well as its diameter are chosen according to the configuration of the yoke and said at least one element carried by the yoke, so that the flange does not interfere with said at least one element when in place for clamping said at least one injector.
[0023] D'autres caractéristiques, buts et avantages de la présente invention apparaîtront à la lecture de la description détaillée qui va suivre et au regard des dessins annexés donnés à titre d'exemples non limitatifs et sur lesquels :  Other features, objects and advantages of the present invention will appear on reading the detailed description which follows and with reference to the accompanying drawings given by way of non-limiting examples and in which:
- la figure 1 est une représentation schématique d'une vue en perspective de deux injecteurs présentant entre eux une bride de fixation selon la présente invention, FIG. 1 is a schematic representation of a perspective view of two injectors having between them a fixing flange according to the present invention,
- la figure 2 est une représentation schématique d'une vue en perspective latérale d'une bride de fixation selon la présente invention, cette bride de fixation étant agrandie par rapport à la figure 1 , FIG. 2 is a schematic representation of a lateral perspective view of a fastening flange according to the present invention, this fastening flange being enlarged with respect to FIG. 1,
- la figure 3 est une représentation schématique d'une vue en coupe longitudinale d'un injecteur muni d'une bride de fixation selon la présente invention, l'injecteur étant alors solidarisé au moteur thermique et le traversant partiellement.  - Figure 3 is a schematic representation of a longitudinal sectional view of an injector provided with a fastening flange according to the present invention, the injector then being secured to the engine and passing through partially.
[0024] Dans ce qui va suivre, il va être décrit une bride de fixation portant deux injecteurs avec un injecteur placé à chacune de ses extrémités. Si ceci est la forme préférée de réalisation de la présente invention, il est à garder à l'esprit que la présente invention peut aussi concerner une bride pour la fixation d'un seul injecteur.  In what follows, it will be described a mounting flange carrying two injectors with an injector placed at each of its ends. If this is the preferred embodiment of the present invention, it is to be borne in mind that the present invention may also relate to a flange for attachment of a single injector.
[0025] A la figure 1 , il est représenté une bride 1 présentant une fourchette à chacune de ses extrémités longitudinales, chaque fourchette étant avantageusement en forme de U. Chacune des fourchettes 2 reçoit un injecteur 3 ou porte-injecteur. Chaque injecteur 3 comprend un corps principal 3a de forme cylindrique s'étendant sensiblement selon un axe vertical en position montée de l'injecteur 3 sur la culasse du moteur thermique.  In Figure 1, there is shown a flange 1 having a fork at each of its longitudinal ends, each fork being preferably U-shaped. Each of the forks 2 receives an injector 3 or injector holder. Each injector 3 comprises a main body 3a of cylindrical shape extending substantially along a vertical axis in the mounted position of the injector 3 on the cylinder head of the engine.
[0026] Le corps principal 3a de l'injecteur comprend une extrémité inférieure 4 d'injection de carburant à l'intérieur du moteur et une partie supérieure 5, sous laquelle vient en appui la fourchette 2 respective de la bride 1 , ceci avantageusement le plus près possible de la face supérieure de la culasse, non montrée à cette figure mais visible à la figure 3, afin d'éviter tout risque de flambage. The main body 3a of the injector comprises a lower fuel injection end 4 inside the engine and an upper part 5, under which comes support the respective fork 2 of the flange 1, this advantageously as close as possible to the upper face of the yoke, not shown in this figure but visible in Figure 3, to avoid any risk of buckling.
[0027] L'extrémité inférieure 4 de l'injecteur 3 débouche dans une chambre de combustion en envoyant au moins un jet de carburant.  The lower end 4 of the injector 3 opens into a combustion chamber by sending at least one jet of fuel.
[0028] La partie supérieure 5 de l'injecteur 3 comprend un connecteur électrique 15 et une buse de retour 6 de carburant. Il comprend aussi une tête d'injection 7 haute pression située dans une zone centrale de cette partie supérieure.  The upper part 5 of the injector 3 comprises an electrical connector 15 and a return nozzle 6 of fuel. It also comprises a high pressure injection head 7 located in a central zone of this upper part.
[0029] La bride de fixation 1 montrée notamment aux figures 1 et 2 est avantageusement longiforme avec deux branches portant chacune une fourchette 2 à leur extrémité libre. Les deux branches de la bride 1 sont sensiblement de dimensions équivalentes de même que les fourchettes 2, la bride 1 ayant donc un profil symétrique. Dans la partie médiane de la bride 1 , est pratiqué un évidement 8 pour la réception d'un moyen de fixation 16 de la bride 1 avec la culasse. Le moyen de fixation 16 coopère avantageusement par vissage avec le goujon 9 muni d'un épaulement 9a et vissé sur la culasse 13. L'épaulement 9a permet de maintenir le porte arbre à came qui est situé au-dessus de la culasse 13, sur celle-ci. Avantageusement, le moyen de fixation 16 peut présenter une collerette 9a qui s'applique contre la surface supérieure de la culasse et coopère avec un goujon épaulé 9 à sa partie supérieure.  The fastening flange 1 shown in particular in Figures 1 and 2 is preferably elongated with two branches each carrying a fork 2 at their free end. The two branches of the flange 1 are substantially of equivalent dimensions as the forks 2, the flange 1 thus having a symmetrical profile. In the middle part of the flange 1 is made a recess 8 for receiving a fastening means 16 of the flange 1 with the yoke. The fastening means 16 advantageously cooperates by screwing with the stud 9 provided with a shoulder 9a and screwed onto the yoke 13. The shoulder 9a makes it possible to maintain the camshaft holder which is situated above the yoke 13, on it. Advantageously, the fastening means 16 may have a flange 9a which is applied against the upper surface of the yoke and cooperates with a shoulder pin 9 at its upper part.
[0030] Avantageusement, la forme interne de l'évidement 8 est choisie pour permettre un centrage de la bride 1 par rapport au moyen de fixation 16 lors du serrage dudit moyen 16. Par exemple, sans que cela soit limitatif, le fond de l'évidement 8 peut être sous la forme d'une calotte sphérique formant siège d'accueil pour la partie inférieure de la tête du moyen de fixation 16, afin d'assurer un centrage précis de la partie médiane de la bride 1 et éviter un décalage latéral de la bride 1 lors du serrage du moyen de fixation 16, ce décalage se transmettant au positionnement des injecteurs 3 dans leur fourchette 2 respective.  Advantageously, the internal shape of the recess 8 is chosen to allow a centering of the flange 1 relative to the fastening means 16 during the clamping of said means 16. For example, without this being limiting, the bottom of the recess 8 may be in the form of a spherical cap forming a reception seat for the lower part of the head of the fastening means 16, in order to ensure accurate centering of the median part of the flange 1 and to avoid an offset side of the flange 1 when clamping the fastening means 16, this shift being transmitted to the positioning of the injectors 3 in their respective fork 2.
[0031 ] Chacune des fourchettes 2 présente une périphérie interne de forme sensiblement cylindrique ouverte ou de préférence en U et entoure chaque injecteur sur un peu plus de la moitié de la circonférence du corps 3a de l'injecteur 3. La périphérie interne des fourchettes 2 porte avantageusement des formes en saillie 10 coopérant avec les méplats 10a prévus sur la partie en vis-à-vis de l'injecteur 3 respectif, partie qui est introduite dans la fourchette 2. Ainsi, le corps cylindrique 3a de chaque injecteur 3 est indexé en rotation dans la fourchette 2 respective de la bride 1 . [0032] Quand sous forme de U, l'ouverture de chaque fourchette 2 présente avantageusement une partie de fond sensiblement circulaire prolongée vers les extrémités libres de l'ouverture par des parties sensiblement droites portant les formes en saillie 10, ces parties sensiblement droites étant parallèles l'une à l'autre. Each of the forks 2 has an inner periphery of substantially cylindrical shape open or preferably U and surrounds each injector on a little more than half of the circumference of the body 3a of the injector 3. The inner periphery of the forks 2 advantageously carries projecting shapes 10 cooperating with the flats 10a provided on the part opposite the respective injector 3, part which is introduced into the fork 2. Thus, the cylindrical body 3a of each injector 3 is indexed in rotation in the respective fork 2 of the flange 1. When in U-shape, the opening of each fork 2 advantageously has a substantially circular bottom portion extended towards the free ends of the opening by substantially straight portions carrying the projecting shapes 10, these substantially straight portions being parallel to each other.
[0033] Conformément à la présente invention, chaque fourchette 2 présente une périphérie extérieure formant un cylindre étagé. Le cylindre étagé comprend une première portion cylindrique 1 1 disposée en dessous d'une seconde portion cylindrique 12, le diamètre de la première portion cylindrique 1 1 étant plus faible que le diamètre de la seconde portion cylindrique 12. La hauteur de la première portion cylindrique 1 1 de même que son diamètre sont choisis selon la configuration de la culasse et les éléments portés par la culasse à proximité de l'injecteur 3, afin que la bride 1 n'interfère pas avec ces éléments quand mise en place pour le bridage de l'injecteur 3 ou lors de la mise en position de l'ensemble formé par la bride 1 et au moins un injecteur 3, avantageusement deux injecteurs 3.  According to the present invention, each fork 2 has an outer periphery forming a stepped cylinder. The stepped cylinder comprises a first cylindrical portion 1 1 disposed below a second cylindrical portion 12, the diameter of the first cylindrical portion 1 1 being smaller than the diameter of the second cylindrical portion 12. The height of the first cylindrical portion 1 1 and its diameter are chosen according to the configuration of the cylinder head and the elements carried by the cylinder head near the injector 3, so that the flange 1 does not interfere with these elements when in place for the clamping of the injector 3 or when placing the assembly formed by the flange 1 and at least one injector 3, preferably two injectors 3.
[0034] Avantageusement, les formes en saillie 10 présentées par la périphérie interne de chacune des fourchettes 2 sont au niveau de la première portion cylindrique 1 1 et ne dépassent pas du niveau de la jonction entre la première portion cylindrique 1 1 et la seconde portion cylindrique 12.  Advantageously, the projecting shapes 10 presented by the inner periphery of each of the forks 2 are at the level of the first cylindrical portion 1 1 and do not exceed the level of the junction between the first cylindrical portion 1 1 and the second portion. cylindrical 12.
[0035] Le corps de la bride 1 entre les deux fourchettes 2 peut être légèrement incliné avec les extrémités du corps de la bride 1 portant les fourchettes 2 disposées à un niveau inférieur que la partie médiane de la bride 1 traversée par l'évidement 8.  The body of the flange 1 between the two forks 2 may be slightly inclined with the ends of the body of the flange 1 carrying the forks 2 arranged at a lower level than the middle portion of the flange 1 through the recess 8 .
[0036] La figure 3 montre un injecteur 3 d'un groupe de deux injecteurs reliés l'un à l'autre par la bride 1 selon la présente invention, la bride 1 étant fixée à la surface supérieure 13 d'une culasse, comme précédemment mentionné. La surface supérieure 13 de la culasse porte divers éléments 14 qui pouvaient interférer avec une bride de l'état de la technique, ce qui ne se produit plus avec la bride 1 de la présente invention.  Figure 3 shows an injector 3 of a group of two injectors connected to each other by the flange 1 according to the present invention, the flange 1 being fixed to the upper surface 13 of a cylinder head, as shown in FIG. previously mentioned. The upper surface 13 of the cylinder head carries various elements 14 which could interfere with a flange of the state of the art, which no longer occurs with the flange 1 of the present invention.
[0037] Par exemple, à la figure 3, la culasse supporte deux porte-arbre à cames 14 dont une partie respective se trouve à proximité de la fourchette 2 de la bride 1 recevant en son intérieur le corps 3a de l'injecteur 3. Comme la paroi externe de la fourchette 2 est étagée en présentant deux portions cylindriques 1 1 et 12 de diamètre différent, avec la première portion cylindrique 1 1 de plus petit diamètre se trouvant la plus proche de la face supérieure 13 de la culasse, cette première portion cylindrique 1 1 n'interfère pas avec les parties respectives des deux porte-arbre à cames 14, ce qui ne serait pas le cas de la seconde portion cylindrique 12 si celle-ci remplaçait la première portion cylindrique 1 1 . [0038] Ainsi, il n'est plus nécessaire de rehausser la bride de fixation par rapport à la surface supérieure 13 de la culasse afin d'éviter toute interférence des fourchettes 2 de la bride 1 avec des éléments 14 environnants portés par la surface supérieure 13 de la culasse. For example, in FIG. 3, the yoke supports two camshaft holders 14, a respective portion of which is close to the fork 2 of the flange 1 receiving inside its body 3a of the injector 3. As the outer wall of the fork 2 is stepped by having two cylindrical portions 11 and 12 of different diameter, with the first cylindrical portion 11 of smaller diameter being closest to the upper face 13 of the breech, this first cylindrical portion 1 1 does not interfere with the respective parts of the two camshaft holders 14, which would not be the case of the second cylindrical portion 12 if it replaced the first cylindrical portion January 1. Thus, it is no longer necessary to raise the mounting flange relative to the upper surface 13 of the cylinder head to prevent interference of the forks 2 of the flange 1 with surrounding elements 14 carried by the upper surface 13 of the breech.
[0039] A la figure 3, il est aussi visible les méplats 10a à la périphérie du corps 3a de l'injecteur 3 coopérant chacun avec une forme en saillie 10 à l'intérieur de la fourchette 2.  In Figure 3, it is also visible the flats 10a at the periphery of the body 3a of the injector 3 each cooperating with a projecting shape 10 inside the fork 2.
[0040] La bride de fixation selon la présente invention permet l'utilisation sans modification d'un injecteur standard, ce qui représente un coût réduit de mise en œuvre. La fixation de la bride est réalisée au plus près de la face d'appui de l'injecteur, ce qui réduit les risques de flambage. Le serrage de l'injecteur s'effectue perpendiculairement à sa face d'appui, ce qui diminue les pertes de couple de serrage.  The mounting flange according to the present invention allows the use without modification of a standard injector, which represents a reduced cost of implementation. Fixing the flange is performed closer to the bearing face of the injector, which reduces the risk of buckling. The injector is clamped perpendicularly to its bearing face, which reduces the tightening torque losses.
[0041 ] De plus, la bride de fixation selon l'invention présente un encombrement réduit du fait de la présence d'un cylindre étagé à chacune de sa ou de ses fourchettes d'extrémité. Il en va de même pour l'encombrement de l'injecteur qui n'a pas besoin d'être rehaussé par rapport à la culasse. Avec une telle bride, il n'y a, par exemple, pas d'impact sur les mesures concernant le choc piéton ou la position du capot.  In addition, the fixing flange according to the invention has a reduced size due to the presence of a stepped cylinder to each of his or her end of the forks. It is the same for the size of the injector that does not need to be raised relative to the cylinder head. With such a flange, there is, for example, no impact on the measures concerning the pedestrian impact or the position of the cover.
[0042] Enfin et surtout, la bride coulissante selon la présente invention est actuellement la seule solution possible de fixation d'injecteurs comportant des méplats de fixation sur certaines des architectures de culasse à hauteur réduite, par exemple une architecture de culasse à 16 soupapes.  Finally and most importantly, the sliding flange according to the present invention is currently the only possible solution for fixing injectors having fastening flats on some of the reduced height cylinder architecture, for example a 16-valve cylinder head architecture.
[0043] L'invention n'est nullement limitée aux modes de réalisation décrits et illustrés qui n'ont été donnés qu'à titre d'exemples.  The invention is not limited to the described and illustrated embodiments which have been given only as examples.

Claims

REVENDICATIONS
1 . Bride (1 ) de fixation d'au moins un injecteur (3) à une culasse de moteur thermique, la bride (1 ) comprenant une fourchette (2) à au moins une de ses extrémités entourant au moins partiellement en venant en appui contre l'injecteur (3), caractérisée en ce que la fourchette (2) présente une périphérie extérieure formant un cylindre étagé comprenant une première portion cylindrique (1 1 ) disposée en dessous d'une seconde portion cylindrique (12), le diamètre de la première portion cylindrique (1 1 ) étant plus faible que le diamètre de la seconde portion cylindrique (12).  1. Flange (1) for fixing at least one injector (3) to an engine cylinder head, the flange (1) comprising a fork (2) at at least one of its ends at least partially surrounding while bearing against the injector (3), characterized in that the fork (2) has an outer periphery forming a stepped cylinder comprising a first cylindrical portion (1 1) disposed below a second cylindrical portion (12), the diameter of the first cylindrical portion (1 1) being smaller than the diameter of the second cylindrical portion (12).
2. Bride (1 ) de fixation selon la revendication 1 , pour laquelle il est prévu un évidement (8) traversant la bride (1 ), cet évidement (8) recevant un moyen de fixation (16) solidarisant la bride (1 ) avec la culasse du moteur thermique, par l'intermédiaire d'un goujon épaulé (9).  2. Flange (1) for fixing according to claim 1, wherein there is provided a recess (8) passing through the flange (1), this recess (8) receiving a fastening means (16) solidarisant the flange (1) with the cylinder head of the engine, via a stepped pin (9).
3. Bride (1 ) de fixation selon la revendication 1 ou 2, pour laquelle la fourchette (2) de la bride (1 ) présente intérieurement des formes en saillie (10) destinées à coopérer avec des méplats (10a) prévus sur l'injecteur (3).  3. Flange (1) for fixing according to claim 1 or 2, wherein the fork (2) of the flange (1) has internally projecting shapes (10) for cooperating with flats (10a) provided on the injector (3).
4. Bride (1 ) de fixation selon la revendication 3, pour laquelle la périphérie interne de la fourchette (2) présente un fond sensiblement circulaire prolongé sur chacun des côtés internes par une partie droite portant chacune une forme en saillie (10).  4. Flange (1) for fixing according to claim 3, wherein the inner periphery of the fork (2) has a substantially circular bottom extended on each of the inner sides by a straight portion each having a projecting shape (10).
5. Bride (1 ) de fixation selon l'une quelconque des revendications 3 ou 4, pour laquelle les formes en saillie (10) sont au niveau de la première portion cylindrique (1 1 ).  5. Flange (1) for fixing according to any one of claims 3 or 4, wherein the projecting shapes (10) are at the first cylindrical portion (1 1).
6. Bride (1 ) de fixation selon l'une quelconque des revendications précédentes, laquelle bride (1 ) de fixation comprend une fourchette (2) à chacune de ses extrémités, chacune des fourchettes (2) recevant un injecteur (3) respectif.  6. Flange (1) for fixing according to any one of the preceding claims, which flange (1) attachment comprises a fork (2) at each of its ends, each of the forks (2) receiving a respective injector (3).
7. Bride (1 ) de fixation selon la revendication 6, dans laquelle, quand la bride (1 ) de fixation présente un évidement (8), cet évidement (8) est disposé dans la partie médiane de la bride (1 ).  Fastening flange (1) according to claim 6, wherein, when the fastening flange (1) has a recess (8), this recess (8) is disposed in the middle part of the flange (1).
8. Bride (1 ) de fixation selon l'une quelconque des revendications 6 ou 7, pour laquelle la partie médiane de la bride (1 ) se trouve à un niveau surélevé par rapport à ses extrémités portant une fourchette (2) respective.  8. Flange (1) for fixing according to any one of claims 6 or 7, wherein the middle portion of the flange (1) is at a level raised relative to its ends carrying a fork (2) respectively.
9. Ensemble formé d'au moins un injecteur (3) et d'une bride (1 ) de fixation selon l'une quelconque des revendications précédentes.  9. Assembly formed of at least one injector (3) and a flange (1) for fixing according to any one of the preceding claims.
10. Culasse de moteur thermique présentant au moins un élément (14) à sa surface supérieure (13) et au moins un ensemble formé d'au moins un injecteur (3) et d'une bride (1 ) de fixation selon la revendication 9, une partie de l'injecteur (3) traversant ladite culasse, caractérisée en ce que la hauteur de la première portion cylindrique (1 1 ) d'une ou de chaque fourchette (2) de la bride (1 ) de fixation de même que son diamètre sont choisis selon la configuration de la culasse et dudit au moins un élément (14) porté par la culasse, afin que la bride (1 ) n'interfère pas avec ledit au moins un élément (14) quand mise en place pour le bridage dudit au moins un injecteur (3). 10. Cylinder head having at least one element (14) at its upper surface (13) and at least one assembly formed of at least one injector (3) and a fastening flange (1) according to claim 9, a part of the injector (3) passing through said cylinder head, characterized in that the height of the first cylindrical portion (1 1) of one or each fork (2) of the fastening flange (1) as well as its diameter are chosen according to the configuration of the yoke and said at least one element (14) carried by the yoke, so that the flange (1) does not interfere with said at least one element (14) when in place for clamping said at least one injector (3).
PCT/FR2013/052130 2012-10-01 2013-09-17 Flange for fastening at least one injector to a cylinder head of a combustion engine WO2014053725A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13789606.4A EP2909468A1 (en) 2012-10-01 2013-09-17 Flange for fastening at least one injector to a cylinder head of a combustion engine
CN201380051606.1A CN104718372B (en) 2012-10-01 2013-09-17 For the ring flange being fixed at least one injector on the cylinder cover of automobile internal engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1259272 2012-10-01
FR1259272A FR2996262B1 (en) 2012-10-01 2012-10-01 FLANGE FOR ATTACHING AT LEAST ONE INJECTOR TO A THERMAL MOTOR HEAD

Publications (1)

Publication Number Publication Date
WO2014053725A1 true WO2014053725A1 (en) 2014-04-10

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PCT/FR2013/052130 WO2014053725A1 (en) 2012-10-01 2013-09-17 Flange for fastening at least one injector to a cylinder head of a combustion engine

Country Status (4)

Country Link
EP (1) EP2909468A1 (en)
CN (1) CN104718372B (en)
FR (1) FR2996262B1 (en)
WO (1) WO2014053725A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3034470A1 (en) * 2015-04-01 2016-10-07 Peugeot Citroen Automobiles Sa FLANGE FOR FIXING AN INJECTOR TO A HEAT ENGINE HEAD

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0735267A2 (en) * 1995-03-30 1996-10-02 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Mounting device of an injection nozzle in particular on the cylinder head of an internal combustion engine
GB2337083A (en) * 1998-05-09 1999-11-10 Perkins Engines Co Ltd A fuel injector clamp for an internal combustion engine
WO2008009842A1 (en) * 2006-07-21 2008-01-24 Peugeot Citroën Automobiles SA Combustion engine injector holder retaining fork
US7334572B1 (en) 2007-01-30 2008-02-26 Ford Global Technologies, Llc System and method for securing fuel injectors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0735267A2 (en) * 1995-03-30 1996-10-02 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Mounting device of an injection nozzle in particular on the cylinder head of an internal combustion engine
GB2337083A (en) * 1998-05-09 1999-11-10 Perkins Engines Co Ltd A fuel injector clamp for an internal combustion engine
WO2008009842A1 (en) * 2006-07-21 2008-01-24 Peugeot Citroën Automobiles SA Combustion engine injector holder retaining fork
US7334572B1 (en) 2007-01-30 2008-02-26 Ford Global Technologies, Llc System and method for securing fuel injectors

Also Published As

Publication number Publication date
FR2996262A1 (en) 2014-04-04
EP2909468A1 (en) 2015-08-26
FR2996262B1 (en) 2014-10-10
CN104718372B (en) 2017-11-10
CN104718372A (en) 2015-06-17

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