WO2008064970A1 - Strip for damping vibrations of injection pipes on an internal combustion engine - Google Patents

Strip for damping vibrations of injection pipes on an internal combustion engine Download PDF

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Publication number
WO2008064970A1
WO2008064970A1 PCT/EP2007/061789 EP2007061789W WO2008064970A1 WO 2008064970 A1 WO2008064970 A1 WO 2008064970A1 EP 2007061789 W EP2007061789 W EP 2007061789W WO 2008064970 A1 WO2008064970 A1 WO 2008064970A1
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WO
WIPO (PCT)
Prior art keywords
damping
pipes
intermediate element
bar
rigid
Prior art date
Application number
PCT/EP2007/061789
Other languages
French (fr)
Inventor
Jean-Yves Der-Matheossian
Original Assignee
Renault S.A.S.
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 Renault S.A.S. filed Critical Renault S.A.S.
Publication of WO2008064970A1 publication Critical patent/WO2008064970A1/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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means

Definitions

  • the present invention relates to a vibration damping bar for injection pipes on an internal combustion engine, which finds particular application on a diesel engine.
  • the injection lines on the cylinder head, connecting the injection pump to the injectors of an internal combustion engine, are subject to unwanted vibration during operation of the engine.
  • the invention aims to improve the systems of the prior art and proposes to overcome their drawbacks, in particular reduce vibrations for pipes distant from each other and which do not extend parallel to each other.
  • the damping bar comprises one or more of the following features:
  • the damping means are damping means by internal shear
  • the damping means comprise at least two rigid elements held at a distance from one another by at least one intermediate element capable of damping the vibrations of the pipes by internal shear between the rigid elements and the intermediate element;
  • a first part of the rigid elements forms a first part of the fixing means, and a second part of the rigid elements, extending between the pipes, are connected and kept at a distance from each other by at least one intermediate element;
  • a layered composite element comprising at least a first and a second rigid element kept at a distance from one another by at least one intermediate element is locally deformed so as to constitute first parts of the fixing means of the bar on the injection pipes, the bar also having at least one separation made in each rigid element between two consecutive deformations so that the fastening means are connected to one another through the intermediate element;
  • the separations made in a first and a second rigid elements in contact with the same intermediate element are located in the vicinity respectively of a first and a second consecutive deformations, to increase the endurance of the intermediate element;
  • the fixing means on the pipes comprise at least one rigid part and a flexible protection part arranged between the rigid parts and the pipe to be clamped, making it possible to protect the pipe from cuts caused by friction between the rigid part and the pipe; ;
  • the intermediate element comprises a viscoelastic material
  • At least one intermediate element is of the rubber type so as to allow the realization of a strip by stamping retaining damping properties by internal shear.
  • FIG. 1 is a block diagram of installation of a bar connecting two injection pipes
  • FIG. 2 is a section of the bar of Figure 1 in place on injection pipes according to the first embodiment
  • FIG. 3 is a section of the bar of Figure 1 in place on injection pipes according to a second embodiment
  • FIG. 4 is a perspective view of a bar according to a second embodiment.
  • the invention proposes to connect at least two injection pipes 2 to each other by fixing them mutually with a bar 1 whose constituents dissipate part of the energy. 2.
  • this reduction in the vibrations of the injection pipes 2 makes it possible at the same time to reduce the noise that they radiate and also to reduce the vibrations that they communicate to the other organs of the engine.
  • These vibrations are in particular communicated to the injectors 3 and to the injection pump 4 resulting in fatigue fractures at their interfaces with the injection pipes 2.
  • Figure 2 details the embodiment of the bar 1 according to the first embodiment by having a section thereof in place on pipes 2 along a transverse axis thereof.
  • the bar 1 consists of fixing means 10 on the pipes 2, for example metal collars, arranged at each end of the bar 1.
  • the collar 10 On its internal face, that is to say, directed to the injection pipe 2, the collar 10 has a flexible element 5, for example a ribbon-shaped rubber section, said flexible element 5 providing a connection between the collar 10 and the injection pipe 2.
  • This flexible element 5 protects the surface of the injection pipes 2 of a friction between the collar 1 0 and the pipe 2 which could lead to fatigue fractures.
  • Clamping means 6 make it possible to close the metal collars 1 0 around the injection pipe 2.
  • the collars 10 are connected to one another by damping means 20 that dissipate the vibrations communicated to them by an internal shearing effect. between their constituents.
  • the damping means 20 comprise several layers of constituents forming a composite element.
  • the composite element comprises a first 21 and a second 22 rigid elements, these elements remaining deformable, metal tabs for example.
  • U first portion 21a, 22a of the first and second rigid elements form a first portion 1 1a, 12a of a first 1 1 and a second 1 2 fastening means, and then have a shape adapted to grip in
  • the second portions 21b, 22b of these rigid elements are in contact with an intermediate element 23 of viscoelastic material. More precisely, this intermediate element 23 is held between these two second parts 21b, 22b of the rigid elements by adhesion.
  • the number of intermediate elements 23 can be multiplied.
  • the collars 1 1, 1 2 are completed by second parts January 1, 12b having a shape adapted to complete the clamping of the pipes 2 in cooperation with the first parts of the collars January 1, 12a.
  • the bar 1 provides two damping functions.
  • the primary function consists in reducing the vibrations experienced by the injection pipes 2.
  • a second function is to prevent the constituents of these bars 1 from resonating because of the vibrations produced by the pipes 2 and bring additional vibrations. , of a different type but which can also be penalizing.
  • This second damping function then makes it possible to form bars 1 capable of binding injection pipes 2 situated at a greater distance without seeing the level of damping reaching a threshold beyond which additional vibrations appear.
  • the bar 1 in a composite sandwich-sheet-based element comprising two facings constituting the rigid elements 21, 22 whose core constituting the intermediate element 23 comprises a viscoelastic material, in particular rubber.
  • This embodiment makes it possible to facilitate the industrial production of bars 1 of shapes adapted to be fixed on injection pipes 2 whose axes are crossed. It is thus possible to achieve a second objective of the invention which is to attenuate the vibrations of injection pipes 2 which do not have portions whose axis is parallel to at least one other pipe 2 of the injection system. In other words, it is possible to bind both pipes extending rectilinearly but whose longitudinal axes are not parallel than pipes 2 which have curvatures.
  • the bar 1 is obtained by stamping the composite element, which has the advantage of being able to give it the desired shape, corresponding to the geometry of the pipes 2 to be bonded.
  • the use of the composite element based on said sandwich sheet makes it possible to maintain the adhesion of the facings 21, 22 to the core 23, while avoiding that the facings 21, 22 come into direct contact after modification of the shape by stamping. This ensures that the strip 1 whose shape has been modified still has the internal shear properties between the constituents of the damping means 20 to achieve the attenuation of vibrations.
  • the fastening means 1 00 here metal collars
  • the fastening means 1 00 can be made at least partly with the same constituents as those constituting the damping means 200, it is that is to say the rigid elements 210, 220 and the intermediate element 230, which is advantageous on a plan of industrial realization.
  • the bar 1 then comprises a first 21 0 and a second 220 rigid elements, separated by at least one intermediate element 230 of viscoelastic material, all these elements being locally deformed so that they respectively constitute a first portion 1 10a, 1 20a of the first 1 1 0 and second attachment means 1 20 and can match the shape of the section of the injection pipes 2.
  • a composite sandwich sheet is particularly suitable for this embodiment for the reasons mentioned above, in particular to prevent the rigid elements 21 0, 220 from coming into contact with each other.
  • separations 211, 221 are made in the rigid elements 210, 220 so that the strip has shear damping properties.
  • a first separation 211 is made on the first rigid element 210 between the first fastening means 110 secured to the second rigid element 220 and the second fastening means 120 integral with the first rigid element 210.
  • a second separation 221 is formed on the second rigid element 220 between the second fastening means 120 integral with the first rigid element 210 and the first fastening means 110 integral with the second rigid element 220.
  • the invention finds a preferred application on diesel engines comprising a high pressure common rail diesel injection system. However, it is understood that it also finds application to other types of engine and other injection systems.

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

Abstract

The invention relates to a strip for damping vibrations (1) for injection pipes (2) of an internal combustion engine, particularly a diesel engine, characterized in that the strip (1) comprises means (10, 100) of attachment to the pipes (2) and damping means (20, 200) running between the attachment means (10, 100).

Description

BARRETTE AMORTISSANT LES VIBRATIONS DE TUYAUX D'INJECTION SUR UN MOTEUR A COMBUSTION INTERNE BARRIER DAMPING THE VIBRATION OF INJECTION PIPES ON AN INTERNAL COMBUSTION ENGINE
La présente invention se rapporte à une barrette d'amortissement de vibrations pour des tuyaux d'injection sur un moteur à combustion interne, qui trouve une application particulière sur un moteur Diesel.The present invention relates to a vibration damping bar for injection pipes on an internal combustion engine, which finds particular application on a diesel engine.
Les conduites d'injection se trouvant sur la culasse, reliant la pompe à injection aux injecteurs d'un moteur à combustion interne, sont soumises à des vibrations parasites indésirables pendant le fonctionnement du moteur.The injection lines on the cylinder head, connecting the injection pump to the injectors of an internal combustion engine, are subject to unwanted vibration during operation of the engine.
Ces vibrations produisent des effets mécaniques qui provoquent des dysfonctionnements du système d'injection nuisant à la fiabilité des injecteurs et des effets acoustiques qui provoquent des bruits, tels que des bourdonnements nuisant au confort de l'utilisateur du véhicule. Ces effets affectent particulièrement les systèmes d'injection en carburant diesel haute pression à rampe commune.These vibrations produce mechanical effects that cause malfunctions of the injection system that adversely affect the reliability of the injectors and acoustic effects that cause noises, such as buzzing affecting the comfort of the user of the vehicle. These effects particularly affect high pressure common rail diesel fuel injection systems.
Il est proposé dans l'art antérieur de maintenir les conduites d'injection entre elles pour éviter qu'elles ne vibrent. Dans le brevet FR2861433, on place des manchons sur des tuyaux d'injection de manière à modifier la fréquence propre de résonance du tuyaux et/ou en diminuer l'amplitude. Cependant, l'ajout de ces manchons ne peut être envisagé que sur des tuyaux d'injection isolés, et n'est pas adaptée à une application à des injecteurs haute pression.It is proposed in the prior art to maintain the injection lines between them to prevent them from vibrating. In the patent FR2861433, sleeves are placed on injection pipes so as to modify the natural frequency of resonance of the pipes and / or decrease the amplitude. However, the addition of these sleeves can be envisaged only on isolated injection pipes, and is not suitable for application to high pressure injectors.
Dans le brevet FR231 5013, on lie mutuellement les tuyaux d'injection très proches les uns des autres par des bagues en caoutchouc et des colliers d'attache. Cependant, ces moyens de liaison ne peuvent être mis en œuvre que sur des tuyaux d'injections peu éloignés les uns des autres et sur des tuyaux s'étendant sensiblement parallèlement les uns aux autres pour éviter que des vibrations ne soient générées par les moyens de liaison eux-mêmes.In patent FR 2 31 5013, the injection pipes are mutually very close to one another by rubber rings and fastening collars. However, these means of connection can only be implemented on injection pipes not far from each other and on pipes extending substantially parallel to each other to prevent vibrations being generated by the connecting means themselves.
L'invention vise à améliorer les systèmes de l'art antérieur et se propose de remédier à leurs inconvénients, notamment réduire les vibrations pour des tuyaux éloignés les uns des autres et qui ne s'étendent pas parallèlement les uns aux autres.The invention aims to improve the systems of the prior art and proposes to overcome their drawbacks, in particular reduce vibrations for pipes distant from each other and which do not extend parallel to each other.
C'est un objet de la présente invention que de proposer une barrette qui comprend des moyens de fixation sur les tuyaux et des moyens d'amortissement s'étendant entre les moyens de fixation.It is an object of the present invention to provide a bar which comprises fixing means on the pipes and damping means extending between the fixing means.
Suivant des modes particuliers de réalisation, la barrette d'amortissement comporte l'une ou plusieurs des caractéristiques suivantes :According to particular embodiments, the damping bar comprises one or more of the following features:
- les moyens d'amortissement sont des moyens d'amortissement par cisaillement interne;the damping means are damping means by internal shear;
- les moyens d'amortissement comprennent au moins deux éléments rigides maintenus à distance l'un de l'autre par au moins un élément intercalaire apte à amortir les vibrations des tuyaux par cisaillement interne entre les éléments rigides et l'élément intercalaire;- The damping means comprise at least two rigid elements held at a distance from one another by at least one intermediate element capable of damping the vibrations of the pipes by internal shear between the rigid elements and the intermediate element;
- une première partie des éléments rigides forme une première partie des moyens de fixation, et une deuxième partie des éléments rigides, s'étendant entre les tuyaux, sont liés et maintenus à distance les uns des autres par au moins un élément intercalaire ;a first part of the rigid elements forms a first part of the fixing means, and a second part of the rigid elements, extending between the pipes, are connected and kept at a distance from each other by at least one intermediate element;
- un élément composite en couches comprenant au moins un premier et un deuxième éléments rigides maintenus à distance l'un de l'autre par au moins un élément intercalaire est localement déformé de manière à constituer des premières parties des moyens de fixation de la barrette sur les tuyaux d'injection, la barrette présentant également au moins une séparation réalisée dans chaque élément rigide entre deux déformations consécutives pour que les moyens de fixation soient reliés l'un à l'autre au travers de l'élément intercalaire ;a layered composite element comprising at least a first and a second rigid element kept at a distance from one another by at least one intermediate element is locally deformed so as to constitute first parts of the fixing means of the bar on the injection pipes, the bar also having at least one separation made in each rigid element between two consecutive deformations so that the fastening means are connected to one another through the intermediate element;
- les séparations réalisées dans un premier et dans un deuxième éléments rigides en contact avec un même élément intercalaire sont localisées au voisinage respectivement d'une première et d'une deuxième déformations consécutives, permettant d'augmenter l'endurance de l'élément intercalaire ;- The separations made in a first and a second rigid elements in contact with the same intermediate element are located in the vicinity respectively of a first and a second consecutive deformations, to increase the endurance of the intermediate element;
- les moyens de fixation sur les tuyaux comprennent au moins une partie rigide et une partie souple de protection disposée entre les parties rigides et le tuyau à enserrer, permettant de protéger le tuyaux d'entailles provoquées par des frottements entre la partie rigide et le tuyau ;the fixing means on the pipes comprise at least one rigid part and a flexible protection part arranged between the rigid parts and the pipe to be clamped, making it possible to protect the pipe from cuts caused by friction between the rigid part and the pipe; ;
- l'élément intercalaire comporte un matériau viscoélastique ;the intermediate element comprises a viscoelastic material;
- au moins un élément intercalaire est de type caoutchouc de manière à permettre la réalisation d'une barrette par emboutissage conservant des propriétés d'amortissement par cisaillement interne.- At least one intermediate element is of the rubber type so as to allow the realization of a strip by stamping retaining damping properties by internal shear.
D'autres caractéristiques et avantages de l'invention apparaîtront clairement à la lecture de la description suivante du mode de réalisation non limitatif de celle-ci, en liaison avec les dessins annexés sur lesquels : - la figure 1 est un schéma de principe d'installation d'une barrette reliant deux tuyaux d'injection;Other characteristics and advantages of the invention will become clear from reading the following description of the nonlimiting embodiment thereof, in conjunction with the appended drawings in which: - Figure 1 is a block diagram of installation of a bar connecting two injection pipes;
- la figure 2 est une coupe de la barrette de la figure 1 en place sur des tuyaux d'injection conformément au premier mode de réalisation;- Figure 2 is a section of the bar of Figure 1 in place on injection pipes according to the first embodiment;
- la figure 3 est une coupe de la barrette de la figure 1 en place sur des tuyaux d'injection conformément à un deuxième mode de réalisation;- Figure 3 is a section of the bar of Figure 1 in place on injection pipes according to a second embodiment;
- la figure 4 est une vue en perspective d'une barrette selon un deuxième mode de réalisation.- Figure 4 is a perspective view of a bar according to a second embodiment.
Pour diminuer l'amplitude des vibrations générées par des tuyaux d'injection 2, l'invention propose de relier entre eux au moins deux tuyaux d'injection 2 en les fixant mutuellement avec une barrette 1 dont les constituants dissipent une partie de l'énergie vibratoire des tuyaux d'injection 2. Selon un premier mode de réalisation de l'invention représenté à la figure 1, cette diminution des vibrations des tuyaux d'injection 2 permet à la fois de réduire le bruit qu'ils rayonnent et aussi de diminuer les vibrations qu'ils communiquent aux autres organes du moteur. Ces vibrations sont notamment communiquées aux injecteurs 3 et à la pompe d'injection 4 aboutissant à des ruptures de fatigue au niveau de leurs interfaces avec les tuyaux d'injection 2.To reduce the amplitude of the vibrations generated by injection pipes 2, the invention proposes to connect at least two injection pipes 2 to each other by fixing them mutually with a bar 1 whose constituents dissipate part of the energy. 2. According to a first embodiment of the invention shown in FIG. 1, this reduction in the vibrations of the injection pipes 2 makes it possible at the same time to reduce the noise that they radiate and also to reduce the vibrations that they communicate to the other organs of the engine. These vibrations are in particular communicated to the injectors 3 and to the injection pump 4 resulting in fatigue fractures at their interfaces with the injection pipes 2.
La figure 2 détaille la réalisation de la barrette 1 selon le premier mode de réalisation en présentant une coupe de celle- ci en place sur des tuyaux 2 selon un axe transversal de ceux- ci.Figure 2 details the embodiment of the bar 1 according to the first embodiment by having a section thereof in place on pipes 2 along a transverse axis thereof.
Selon ce premier mode de réalisation, la barrette 1 est constituée de moyens de fixation 10 sur les tuyaux 2, par exemple des colliers métalliques, disposés à chaque extrémité de la barrette 1. Sur sa face interne, c'est-à-dire, dirigée vers le tuyau d'injection 2, le collier 10 dispose d'un élément souple 5, par exemple une section de caoutchouc en forme de ruban, ledit élément souple 5 assurant une liaison entre le collier 10 et le tuyau d'injection 2. Cet élément souple 5 permet de protéger la surface des tuyaux d'injection 2 d'un frottement entre le collier 1 0 et le tuyau 2 qui pourrait conduire à des ruptures de fatigue.According to this first embodiment, the bar 1 consists of fixing means 10 on the pipes 2, for example metal collars, arranged at each end of the bar 1. On its internal face, that is to say, directed to the injection pipe 2, the collar 10 has a flexible element 5, for example a ribbon-shaped rubber section, said flexible element 5 providing a connection between the collar 10 and the injection pipe 2. This flexible element 5 protects the surface of the injection pipes 2 of a friction between the collar 1 0 and the pipe 2 which could lead to fatigue fractures.
Des moyens de serrage 6 permettent de refermer les colliers métalliques 1 0 autour du tuyau d'injection 2. Les colliers 10 sont reliées les uns aux autres par des moyens d'amortissement 20 dissipant les vibrations qui leur sont communiquées par un effet de cisaillement interne entre leurs constituants.Clamping means 6 make it possible to close the metal collars 1 0 around the injection pipe 2. The collars 10 are connected to one another by damping means 20 that dissipate the vibrations communicated to them by an internal shearing effect. between their constituents.
Les moyens d'amortissement 20 comportent plusieurs couches de constituants formant un élément composite. Selon le premier mode de réalisation, représenté à la figure 2, l'élément composite comprend un premier 21 et un deuxième 22 éléments rigides, ces éléments restant déformables, des pattes métalliques par exemple. U ne première partie 21 a, 22a du premier et du deuxième éléments rigides forment une première partie 1 1 a, 12a d'un premier 1 1 et d'un deuxième 1 2 moyens de fixation, et présentent alors une forme adaptée à enserrer en partie les tuyaux 2. Les deuxièmes parties 21 b, 22b de ces éléments rigides sont en contact avec un élément intercalaire 23 en matériau viscoélastique. Plus précisément, cet élément intercalaire 23 est maintenu entre ces deux deuxièmes parties 21 b, 22b des éléments rigides par adhérence. Avantageusement, on peut multiplier le nombre d'éléments intercalaires 23. On obtient alors une décomposition et une diminution des efforts à atténuer par couche de constituant, aboutissant à une efficacité accrue de la réduction des vibrations. Les colliers 1 1 , 1 2 sont complétés par des deuxièmes parties 1 1 b, 12b présentant une forme adaptée à compléter le serrage des tuyaux 2 en coopération avec les premières parties des colliers 1 1 a, 12a.The damping means 20 comprise several layers of constituents forming a composite element. According to the first embodiment, represented in FIG. 2, the composite element comprises a first 21 and a second 22 rigid elements, these elements remaining deformable, metal tabs for example. U first portion 21a, 22a of the first and second rigid elements form a first portion 1 1a, 12a of a first 1 1 and a second 1 2 fastening means, and then have a shape adapted to grip in The second portions 21b, 22b of these rigid elements are in contact with an intermediate element 23 of viscoelastic material. More precisely, this intermediate element 23 is held between these two second parts 21b, 22b of the rigid elements by adhesion. Advantageously, the number of intermediate elements 23 can be multiplied. This results in a decomposition and a reduction in the efforts to be attenuated per constituent layer, resulting in an increased efficiency of the reduction of the vibration. The collars 1 1, 1 2 are completed by second parts January 1, 12b having a shape adapted to complete the clamping of the pipes 2 in cooperation with the first parts of the collars January 1, 12a.
La barrette 1 assure deux fonctions d'amortissement. La fonction première consiste à réduire les vibrations que subissent les tuyaux d'injection 2. Une deuxième fonction est d'éviter que les constituants de ces barrettes 1 n'entrent en résonance en raison des vibrations produites par les tuyaux 2 et apportent des vibrations supplémentaires, d'un type différent mais qui peuvent également être pénalisantes. Cette deuxième fonction d'amortissement permet alors de réaliser des barrettes 1 pouvant lier des tuyaux d'injection 2 situés à une distance plus importante sans voir le niveau d'amortissement atteindre un seuil au-delà duquel des vibrations supplémentaires apparaissent.The bar 1 provides two damping functions. The primary function consists in reducing the vibrations experienced by the injection pipes 2. A second function is to prevent the constituents of these bars 1 from resonating because of the vibrations produced by the pipes 2 and bring additional vibrations. , of a different type but which can also be penalizing. This second damping function then makes it possible to form bars 1 capable of binding injection pipes 2 situated at a greater distance without seeing the level of damping reaching a threshold beyond which additional vibrations appear.
Avantageusement, on peut réaliser la barrette 1 dans un élément composite à base de tôle sandwich comprenant deux parements, constituant les éléments rigides 21 , 22, dont le noyau, constituant l'élément intercalaire 23, comprend un matériau viscoélastique, notamment du caoutchouc. Cette réalisation permet de faciliter la réalisation industrielle de barrettes 1 de formes adaptées à être fixées sur des tuyaux d'injection 2 dont les axes sont croisés. On peut ainsi atteindre un deuxième objectif de l'invention qui est d'atténuer les vibrations de tuyaux d'injection 2 qui ne présentent pas de portions dont l'axe est parallèle à au moins un autre tuyau 2 du système d'injection. Autrement dit, on peut lier aussi bien des tuyaux 2 s'étendant de façon rectiligne mais dont les axes longitudinaux ne sont pas parallèles que des tuyaux 2 qui présentent des courbures. Pour cela, la barrette 1 est obtenue par emboutissage de l'élément composite, ce qui a pour avantage de pouvoir lui donner la forme désirée, correspondante à la géométrie des tuyaux 2 à lier.Advantageously, it is possible to produce the bar 1 in a composite sandwich-sheet-based element comprising two facings constituting the rigid elements 21, 22 whose core constituting the intermediate element 23 comprises a viscoelastic material, in particular rubber. This embodiment makes it possible to facilitate the industrial production of bars 1 of shapes adapted to be fixed on injection pipes 2 whose axes are crossed. It is thus possible to achieve a second objective of the invention which is to attenuate the vibrations of injection pipes 2 which do not have portions whose axis is parallel to at least one other pipe 2 of the injection system. In other words, it is possible to bind both pipes extending rectilinearly but whose longitudinal axes are not parallel than pipes 2 which have curvatures. For this, the bar 1 is obtained by stamping the composite element, which has the advantage of being able to give it the desired shape, corresponding to the geometry of the pipes 2 to be bonded.
L'utilisation de l'élément composite à base de tôle sandwich précité, permet de conserver l'adhérence des parements 21 , 22 au noyau 23, tout en évitant que les parements 21 , 22 ne rentrent en contact direct après modification de la forme par emboutissage. On s'assure ainsi que la barrette 1 dont la forme a été modifiée présente toujours les propriétés de cisaillement interne entre les constituants des moyens d'amortissement 20 pour réaliser l'atténuation des vibrations.The use of the composite element based on said sandwich sheet, makes it possible to maintain the adhesion of the facings 21, 22 to the core 23, while avoiding that the facings 21, 22 come into direct contact after modification of the shape by stamping. This ensures that the strip 1 whose shape has been modified still has the internal shear properties between the constituents of the damping means 20 to achieve the attenuation of vibrations.
Selon un deuxième mode de réalisation, représenté aux figures 3 et 4, les moyens de fixation 1 00, ici des colliers métalliques, peuvent être réalisés au moins en partie avec les mêmes constituants que ceux composant les moyens d'amortissement 200, c'est-à-dire les éléments rigides 210, 220 et l'élément intercalaire 230, ce qui est avantageux sur un plan de la réalisation industrielle.According to a second embodiment, represented in FIGS. 3 and 4, the fastening means 1 00, here metal collars, can be made at least partly with the same constituents as those constituting the damping means 200, it is that is to say the rigid elements 210, 220 and the intermediate element 230, which is advantageous on a plan of industrial realization.
La barrette 1 comprend alors un premier 21 0 et un deuxième 220 éléments rigides, séparés par au moins un élément intercalaire 230 en matériau viscoélastique, tous ces éléments étant localement déformés de manière à ce qu'ils constituent respectivement une première partie 1 10a, 1 20a des premier 1 1 0 et des deuxième moyens 1 20 de fixation et puissent épouser la forme de la section des tuyaux d'injection 2. Un élément composite à base de tôle sandwich est particulièrement adapté à ce mode de réalisation pour les raisons précitées, notamment d'éviter que les éléments rigides 21 0, 220 ne rentrent en contact les uns avec les autres. Selon ce mode de réalisation, on réalise des séparations 211, 221 dans les éléments rigides 210, 220 pour que la barrette présente des propriétés d'amortissement par cisaillement.The bar 1 then comprises a first 21 0 and a second 220 rigid elements, separated by at least one intermediate element 230 of viscoelastic material, all these elements being locally deformed so that they respectively constitute a first portion 1 10a, 1 20a of the first 1 1 0 and second attachment means 1 20 and can match the shape of the section of the injection pipes 2. A composite sandwich sheet is particularly suitable for this embodiment for the reasons mentioned above, in particular to prevent the rigid elements 21 0, 220 from coming into contact with each other. According to this embodiment, separations 211, 221 are made in the rigid elements 210, 220 so that the strip has shear damping properties.
Une première séparation 211 est réalisée sur le premier élément rigide 210 entre le premier moyen de fixation 110 solidaire du deuxième élément rigide 220 et le deuxième moyen de fixation 120 solidaire du premier élément rigide 210.A first separation 211 is made on the first rigid element 210 between the first fastening means 110 secured to the second rigid element 220 and the second fastening means 120 integral with the first rigid element 210.
Une deuxième séparation 221 est réalisée sur le deuxième élément rigide 220 entre le deuxième moyen de fixation 120 solidaire du premier élément rigide 210 et le premier moyen de fixation 110 solidaire du deuxième élément rigide 220.A second separation 221 is formed on the second rigid element 220 between the second fastening means 120 integral with the first rigid element 210 and the first fastening means 110 integral with the second rigid element 220.
Ces séparations sont réalisées dans le premier élément 210 et dans le deuxième élément 220 rigides respectivement au voisinage du premier 110 et du deuxième 120 moyen de fixation. On limite de fait l'usure de l'élément intercalaire 230 dans les zones de séparation, les efforts en flexion étant répartis sur la longueur de l'élément intercalaire 230 compris entre la première 211 et la deuxième séparation 221.These separations are made in the first element 210 and in the second rigid element 220 respectively in the vicinity of the first 110 and the second 120 fixing means. In fact, the wear of the intermediate element 230 is limited in the separation zones, the bending forces being distributed over the length of the intermediate element 230 between the first 211 and the second partition 221.
Dans un but de simplification, dans les modes de réalisation présentés, la mise en œuvre de l'invention a été décrite dans le cas où une barrette 1 relie deux tuyaux d'injection 2. Cependant, le cadre de la mise en œuvre de l'invention ne s'y limite pas, une barrette 1 pouvant relier plus de deux tuyaux d'injection 2.For the sake of simplification, in the embodiments presented, the implementation of the invention has been described in the case where a bar 1 connects two injection pipes 2. However, the framework for the implementation of the invention is not limited thereto, a bar 1 capable of connecting more than two injection pipes 2.
L'invention trouve une application privilégiée sur des moteurs diesel comprenant un système d'injection diesel haute pression à rampe commune. Cependant, il est entendu que celle-ci trouve également application à d'autre type de moteur et à d'autres systèmes d'injection. The invention finds a preferred application on diesel engines comprising a high pressure common rail diesel injection system. However, it is understood that it also finds application to other types of engine and other injection systems.

Claims

REVENDICATIONS
1) Barrette d'amortissement de vibrations (1) pour des tuyaux d'injection (2) sur un moteur à combustion interne, en particulier sur un moteur Diesel, caractérisé en ce que la barrette (1) comprend des moyens de fixation (10, 100) sur les tuyaux (2) et des moyens d'amortissement (20, 200) s'étendant entre les moyens de fixation (10, 100).1) Vibration damping bar (1) for injection pipes (2) on an internal combustion engine, in particular on a diesel engine, characterized in that the bar (1) comprises fixing means (10) , 100) on the pipes (2) and damping means (20, 200) extending between the fixing means (10, 100).
2) Barrette d'amortissement (1) selon la revendication2) damping strip (1) according to the claim
1 caractérisé en ce que les moyens d'amortissement (20, 200) sont des moyens d'amortissement par cisaillement interne.1 characterized in that the damping means (20, 200) are damping means by internal shear.
3) Barrette d'amortissement (1) selon la revendication3) damping strip (1) according to the claim
2 caractérisé en ce que les moyens d'amortissement (20, 200) comprennent au moins deux éléments rigides (21, 22, 210, 220) maintenus à distance l'un de l'autre par au moins un élément intercalaire (23, 230) apte à amortir les vibrations des tuyaux (2) par cisaillement interne entre les éléments rigides (21, 22, 210, 220) et l'élément intercalaire (23, 230).2 characterized in that the damping means (20, 200) comprise at least two rigid elements (21, 22, 210, 220) kept at a distance from one another by at least one intermediate element (23, 230 ) capable of damping the vibrations of the pipes (2) by internal shear between the rigid elements (21, 22, 210, 220) and the intermediate element (23, 230).
4) Barrette d'amortissement (1) selon l'une des revendications précédentes caractérisé en ce qu'une première partie (21a, 22a, 210a, 220a) des éléments rigides (21, 22, 210, 220) forme une première partie (11a, 12a, 110a, 120a) des moyens de fixation (11, 12, 110, 120), et une deuxième partie (21b, 22b, 210b, 220b) des éléments rigides (21, 22, 210, 220), s'étendant entre les tuyaux (2), sont liés et maintenus à distance les uns des autres par au moins un élément intercalaire (23, 230).4) damping strip (1) according to one of the preceding claims characterized in that a first portion (21a, 22a, 210a, 220a) of the rigid elements (21, 22, 210, 220) forms a first part ( 11a, 12a, 110a, 120a) fastening means (11, 12, 110, 120), and a second portion (21b, 22b, 210b, 220b) rigid elements (21, 22, 210, 220), s' extending between the pipes (2), are connected and kept at a distance from each other by at least one intermediate element (23, 230).
5) Barrette d'amortissement (1) selon l'une des revendications précédentes caractérisé en ce qu'un élément composite en couches comprenant au moins un premier (21 0) et un deuxième (220) éléments rigides maintenus à distance l'un de l'autre par au moins un élément intercalaire (230), est localement déformé de manière à constituer des premières parties (1 1 0a, 1 20a) des moyens de fixation (1 1 0, 120) de la barrette (1 ) sur les tuyaux d'injection (2) et en ce qu'au moins une séparation (21 1 , 221 ) est réalisée dans chaque élément rigide (210, 220) entre deux déformations consécutives pour que les moyens de fixation (1 1 0, 1 20) soient reliés l'un à l'autre au travers de l'élément intercalaire (230).5) damping strip (1) according to one of the preceding claims characterized in that an element composite layer comprising at least a first (21 0) and a second (220) rigid elements held at a distance from each other by at least one intermediate element (230), is locally deformed so as to constitute first parts (1 1 0a, 1 20a) fastening means (1 1 0, 120) of the bar (1) on the injection pipes (2) and in that at least one separation (21 1, 221) is performed in each rigid element (210, 220) between two consecutive deformations so that the fastening means (1 1 0, 1 20) are connected to one another through the intermediate element (230).
6) Barrette d'amortissement (1 ) selon la revendication 5 caractérisé en ce que les séparations (21 1 , 221 ) réalisées dans un premier (21 0) et dans un deuxième (220) éléments rigides en contact avec un même élément intercalaire (230) sont localisées au voisinage respectivement d'une première et d'une deuxième déformations consécutives.6) damping strip (1) according to claim 5 characterized in that the separations (21 1, 221) made in a first (21 0) and in a second (220) rigid elements in contact with the same intermediate element ( 230) are located in the vicinity respectively of a first and a second consecutive deformations.
7) Barrette d'amortissement (1 ) selon l'une des revendications précédentes caractérisé en ce que les moyens de fixation (1 1 , 1 2, 1 1 0, 1 20) sur les tuyaux (2) comprennent au moins une partie rigide et une partie souple (5) de protection disposée entre les parties rigides et le tuyau à enserrer.7) damping strip (1) according to one of the preceding claims characterized in that the fastening means (1 1, 1 2, 1 1 0, 1 20) on the pipes (2) comprise at least one rigid part and a flexible protective portion (5) disposed between the rigid portions and the hose to be clamped.
8) Barrette (1 ) suivant l'une des revendications précédentes caractérisé en ce que l'élément intercalaire (23, 230) comporte un matériau viscoélastique.8) bar (1) according to one of the preceding claims characterized in that the intermediate element (23, 230) comprises a viscoelastic material.
9) Barrette (1 ) suivant l'une des revendications précédentes caractérisée en ce qu'au moins un élément intercalaire (23, 230) est de type caoutchouc de manière à permettre la réalisation d'u ne barrette (1 ) par emboutissage conservant des propriétés d'amortissement par cisaillement interne. 9) bar (1) according to one of the preceding claims characterized in that at least one intermediate element (23, 230) is of the rubber type so as to allow the realization of u n bar (1) by stamping retaining damping properties by internal shear.
PCT/EP2007/061789 2006-11-30 2007-10-31 Strip for damping vibrations of injection pipes on an internal combustion engine WO2008064970A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR06/55206 2006-11-30
FR0655206A FR2909420B1 (en) 2006-11-30 2006-11-30 BARRIER DAMPING THE VIBRATION OF INJECTION PIPES ON AN INTERNAL COMBUSTION ENGINE

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
EP2236808A2 (en) 2009-03-30 2010-10-06 Hitachi Ltd. Fuel system for a direct injection engine
EP2657503A1 (en) * 2012-04-26 2013-10-30 Robert Bosch Gmbh Assembly with a fuel distributor and a holder
WO2013160069A1 (en) * 2012-04-26 2013-10-31 Robert Bosch Gmbh Arrangement with a fuel distributer and a retaining element
WO2014040777A1 (en) * 2012-09-13 2014-03-20 Robert Bosch Gmbh Holder for fastening a tubular component to an add-on structure
JP2015068219A (en) * 2013-09-27 2015-04-13 日産自動車株式会社 Engine fuel injection device
US20150204474A1 (en) * 2014-01-23 2015-07-23 Hans-Jurgen Guido After the mass-spring principle operating vibration absorber

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GB700117A (en) * 1951-03-30 1953-11-25 Cav Ltd Vibration damper for pipe systems
FR2315013A1 (en) * 1975-06-19 1977-01-14 Guido Jurgen INJECTION LINE SYSTEM
FR2548279A1 (en) * 1983-06-30 1985-01-04 Daimler Benz Ag Anchoring of engine fuel injection lines
JP2002130077A (en) * 2000-10-25 2002-05-09 Usui Internatl Ind Co Ltd Fuel injection pipe for common rail-type diesel engine

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Publication number Priority date Publication date Assignee Title
GB700117A (en) * 1951-03-30 1953-11-25 Cav Ltd Vibration damper for pipe systems
FR2315013A1 (en) * 1975-06-19 1977-01-14 Guido Jurgen INJECTION LINE SYSTEM
FR2548279A1 (en) * 1983-06-30 1985-01-04 Daimler Benz Ag Anchoring of engine fuel injection lines
JP2002130077A (en) * 2000-10-25 2002-05-09 Usui Internatl Ind Co Ltd Fuel injection pipe for common rail-type diesel engine

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2236808A2 (en) 2009-03-30 2010-10-06 Hitachi Ltd. Fuel system for a direct injection engine
JP2010236535A (en) * 2009-03-30 2010-10-21 Hitachi Ltd Fuel system for direct-injection internal combustion engine
EP2236808A3 (en) * 2009-03-30 2011-03-09 Hitachi Ltd. Fuel system for a direct injection engine
US9429121B2 (en) 2012-04-26 2016-08-30 Robert Bosch Gmbh System having a fuel distributor and a holder
US20130284152A1 (en) * 2012-04-26 2013-10-31 Robert Bosch Gmbh System having a fuel distributor and a mounting support
WO2013160069A1 (en) * 2012-04-26 2013-10-31 Robert Bosch Gmbh Arrangement with a fuel distributer and a retaining element
EP2657503A1 (en) * 2012-04-26 2013-10-30 Robert Bosch Gmbh Assembly with a fuel distributor and a holder
US9970402B2 (en) 2012-04-26 2018-05-15 Robert Bosch Gmbh System having a fuel distributor and a mounting support
WO2014040777A1 (en) * 2012-09-13 2014-03-20 Robert Bosch Gmbh Holder for fastening a tubular component to an add-on structure
US9683532B2 (en) 2012-09-13 2017-06-20 Robert Bosch Gmbh Holder for fastening a tubular component to an attachment structure
EP2895731B1 (en) 2012-09-13 2018-03-07 Robert Bosch GmbH Holder for fastening a tubular component to an add-on structure
JP2015068219A (en) * 2013-09-27 2015-04-13 日産自動車株式会社 Engine fuel injection device
US20150204474A1 (en) * 2014-01-23 2015-07-23 Hans-Jurgen Guido After the mass-spring principle operating vibration absorber
US10203060B2 (en) * 2014-01-23 2019-02-12 Hans-Jurgen Guido After the mass-spring principle operating vibration absorber

Also Published As

Publication number Publication date
FR2909420B1 (en) 2012-01-27
FR2909420A1 (en) 2008-06-06

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