EP3816431B1 - Injecteur de fluide pour moteur à combustion interne comprenant un élément compensateur de pression - Google Patents

Injecteur de fluide pour moteur à combustion interne comprenant un élément compensateur de pression Download PDF

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Publication number
EP3816431B1
EP3816431B1 EP19206326.1A EP19206326A EP3816431B1 EP 3816431 B1 EP3816431 B1 EP 3816431B1 EP 19206326 A EP19206326 A EP 19206326A EP 3816431 B1 EP3816431 B1 EP 3816431B1
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EP
European Patent Office
Prior art keywords
ring
containment
fluid injector
pressure compensator
axial
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19206326.1A
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German (de)
English (en)
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EP3816431A1 (fr
Inventor
Mauro Grandi
Valerio Polidori
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Vitesco Technologies GmbH
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Vitesco Technologies GmbH
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Priority to EP19206326.1A priority Critical patent/EP3816431B1/fr
Publication of EP3816431A1 publication Critical patent/EP3816431A1/fr
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Publication of EP3816431B1 publication Critical patent/EP3816431B1/fr
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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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • 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
    • F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs
    • 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
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps

Definitions

  • a fluid injector for an internal combustion engine comprising a pressure compensator element
  • the invention relates to a fluid injector for an internal combustion engine comprising a pressure compensator element, wherein the fluid injector comprises a valve housing and a valve needle assembly.
  • Fluid injectors are in widespread use, in particular for internal combustion engines, where they may be arranged in order to doze a fluid or fuel amount into an intake manifold of the internal combustion engine or directly into a combustion chamber of a cylinder of the internal combustion engine.
  • One possible starting point to reduce the pollutant emissions and in particular to reduce particle emissions is to increase the fluid pressure inside the fluid injector.
  • Conventional fluid injectors are designed to operate at a fluid pressure of below 10 MPa. If the fluid pressure inside the fluid injector is increased it is possible to reduce pollutant emissions caused by the internal combustion engine. The increased fluid pressure inside the fluid injectors requires a change of design of the fluid injector.
  • a valve needle is arranged which can be displaced away from a closing position to allow the fluid to flow out of the fluid injector. In the closing position the fluid flow out of the fluid injector is inhibited.
  • the valve needle is conventionally displaced away from the closing position by an actuator assembly.
  • US 2,538,658 A relates to resilient mountings designed to connect a supporting and a relatively movable supported member, the combination of a housing of general cylindrical form adapted to be mounted at one end on such supporting member, said housing having an inwardly directed flange at its other end, a member axially disposed within said housing and adapted to be connected to such support member.
  • US 2012/318885 A1 relates to a valve assembly for an injection valve which may include a valve body comprising a cavity with a fluid inlet portion and a fluid outlet, and a valve needle axially movable in the cavity, the valve needle preventing a fluid flow through the fluid outlet in a closing position and releasing the fluid flow through the fluid outlet in further positions, the valve needle comprising a radially extending protrusion and an electro-magnetic actuator unit configured to actuate the valve needle and comprising an armature in the cavity.
  • the armature comprises an armature cavity having a first stop surface and a second stop surface that faces the first stop surface.
  • An object of the present disclosure is to provide an element to improve a fluid injector of an internal combustion engine and to provide a fluid injector with the element, wherein the fluid injector is in particular configured to operate at high fluid pressure inside the fluid injector.
  • a fluid injector comprising a pressure compensator element.
  • Advantageous embodiments of the fluid injector are specified in the dependent claims.
  • a pressure compensator element for a fluid injector for an internal combustion engine is specified.
  • the pressure compensator element extends along a central longitudinal axis.
  • the pressure compensator element comprises a containment ring a first ring and a second ring.
  • the containment ring comprises an elastic material and is therefore configured to deform elastically when the pressure acting on the pressure compensator element changes.
  • the first ring is arranged at or in the containment ring at a first portion of the containment ring and extends out of the containment ring.
  • the second ring is arranged at or in the containment ring at a second portion of the containment ring and extends out of the containment ring.
  • the first portion and the second portion of the containment ring are areas of the containment ring which contact or engage with the first ring or the second ring respectively.
  • the containment ring, the first ring and the second ring are arranged coaxially with respect to each other.
  • the first portion and the second portion of the containment ring are arranged at different axial positions on the containment ring.
  • the first portion is for example arranged at one axial end of the containment ring and the second portion is arranged at the other axial end of the containment ring.
  • the elastic deformation of the containment ring due to a change of the pressure acting on the pressure compensator element results in a volume change of the containment ring. This volume change changes the axial position of the first portion of the containment ring with respect to the second portion of the containment ring.
  • the volume change of the containment ring results in an axial displacement of the first ring with respect to the second ring.
  • the first ring is, for example, arranged at one longitudinal end of the containment ring and the second ring is arranged at the other longitudinal end of the containment ring and the pressure acting on the pressure compensator element increases, than the volume of the containment ring will decrease which results in an axial displacement of the first ring towards the second ring and of the second ring towards the first ring if the pressure compensator element is fixed at its center.
  • the pressure compensator element it is possible to transform the pressure change of the pressure acting on the pressure compensator element into an axial displacement of the first ring with respect to the second ring or of the second ring with respect to the first ring.
  • the deformation of the containment ring is proportional to the pressure change of the pressure acting on the pressure compensator element. Therefore, also the axial displacement is proportional to the pressure change of the pressure acting on the pressure compensator element.
  • the first ring comprises a radial portion which extends in radial direction and an axial portion which extends in axial direction, wherein the axial portion extends from one radial end of the radial portion of the first ring.
  • the half section profile of a longitudinal section view of the first ring has a L-shape.
  • the second ring comprises a radial portion which extends in radial direction and an axial portion which extends in axial direction, wherein the axial portion extends from one radial end of the radial portion of the second ring.
  • the half section profile of a longitudinal section view of the second ring has also a L-shape.
  • the angle between the radial portions and the axial portion could be for example between 70 degree or greater and 110 degree or smaller.
  • the radial portion of the first ring is arranged at least partially at or in the first portion of the containment ring and the radial portion of the second ring is arranged at least partially at or in the second portion of the containment ring.
  • the radial portions of the first ring and the second ring contact the containment ring.
  • the axial portion of the first ring and the axial portion of the second ring extend according to this embodiment in opposite directions. It is in particular possible according to this embodiment to transfer the volume change of the containment ring to the desired displacement of the first ring and the second ring.
  • the free axial ends of the axial portions can be used as stop surfaces and can therefore transfer the force generated by the pressure compensator element at the desired other parts in a particular simple way.
  • the axial portion of the first ring extends from the radial outer end of the radial portion of the first ring and the axial portion of the second ring extends from the radial inner end of the radial portion of the second ring.
  • the axial portion of the first ring is at least partially arranged outside of the radial outer edge of the containment ring and the axial portion of the second ring is arranged at least partially inside of the radial inner edge of the containment ring.
  • the free axial end of the axial portion of the first ring forms one axial end of the pressure compensator element in one axial direction and the free axial end of the axial portion of the second ring forms the other axial end of the pressure compensator element in the other axial direction.
  • the axial portion of the first ring is arranged partially at the first portion of the containment ring.
  • the axial portion of the first ring contacts the containment ring.
  • the second portion of the containment ring extends according to this embodiment further towards the free longitudinal end of the axial portion of the first ring than the first portion of the containment ring, which ensures that the movement between the first portion and the second portion of the containment ring is still possible.
  • the arrangement of the axial portion at the first portion of the containment ring improves the connection between the first ring and the containment ring.
  • the axial portion of the first ring is partially detached from an area of the containment ring, wherein the area extends from the axial end of the containment ring which faces towards the free end of the axial portion of the first ring to the other end of the axial portion of the first ring.
  • the deformation of the containment ring is in particular not inhibited by the first ring according to this embodiment.
  • the axial portion of the second ring is partially detached from an area of the containment ring, wherein the area extends from the axial end of the containment ring which faces towards the free end of the axial portion of the second ring to the other end of the axial portion of the second ring.
  • the deformation of the containment ring is in particular not inhibited by the second ring according to this emebodiment.
  • the axial portion of the second ring is arranged partially at the second portion of the containment ring.
  • the axial portion of the second ring contacts the containment ring.
  • the arrangement of the axial portion at the second portion of the containment ring improves the connection between the second ring and the containment ring.
  • the first ring and/or the second ring is / are partially embedded within the containment ring.
  • the containment ring is for example partially molded around the first ring and / or the second ring.
  • the containment ring consists of a material selected from a group which consists of a rubber material, a plastic material and an elastomeric material.
  • the rubber material is NBR (Acrylonitrile Butadiene Rubber) or HNBR (Hydrogenated Acrylonitrile Butadiene Rubber), these materials are preferred used when the fluid which surrounds the containment ring is water.
  • the elastomeric material is preferred used when the fluid which surrounds the containment ring is gasoline.
  • a fluid injector for internal combustion engine is specified.
  • the fluid injector is in particular a fuel injector. It may preferably by provided for injecting fuel directly in the combustion chamber of the internal combustion engine.
  • the fluid injector may be preferably provided for injecting gasoline or diesel fuel.
  • the fluid injector comprises a valve housing.
  • the valve housing extends along the central longitudinal axis and forms a valve cavity inside the valve housing.
  • the valve cavity comprises an inlet opening and an outlet opening.
  • the inlet opening is configured to allow fluid to flow into the valve cavity and the outlet opening is configured to allow the fluid to flow out of the valve cavity.
  • the fluid injector further comprises a valve needle assembly which comprises a valve needle and an armature and which is arranged inside the valve cavity.
  • the valve needle is displaceable with respect to the valve housing to inhibit or to allow the fluid to flow out of the fluid injector when the fluid injector is in operation.
  • the valve needle forms therefore with a part of the valve cavity of the fluid injector a sealing edge so that no fluid can flow out of the fluid injector when the valve needle is in the closing position.
  • the fluid injector further comprises an actuator assembly which is configured to displace the valve needle away from the closing position so that fluid can flow out of the fluid injector.
  • the fluid injector comprises a pressure compensator element.
  • the pressure compensator element is arranged in the valve cavity.
  • the first ring of the pressure compensator element is configured to engage with a valve cavity surface of the valve cavity.
  • the first ring is for example arranged to be in contact with the valve cavity surface.
  • the second ring of the pressure compensator element is configured to engage with the valve needle assembly.
  • the second ring be configured to contact the valve needle or a part which is rigidly fixed to the valve needle.
  • the first portion of the containment ring is according to this embodiment arranged further towards the inlet opening than the second portion of the containment ring so that the elastic deformation of the containment ring due to a change of the hydrostatic pressure of the fluid acting on the pressure compensator element inside the valve cavity results in a lifting force from the pressure compensator element to the valve needle assembly when the valve needle is in a closed position.
  • the containment ring is arranged in the valve cavity so that the containment ring is exposed to the fluid pressure inside the valve cavity.
  • the second ring and the first ring of the pressure compensator element are arranged at or in the containment ring so that the deformation of the containment ring will force the second ring and/or the first ring to move towards each other.
  • the deformation of the containment ring due to the increasing fluid pressure inside the valve cavity will therefore result in a force applied to the second ring and the first ring.
  • the first ring is engaged with the valve cavity and can for example not move with respect to the valve cavity.
  • the second ring is engaged with the valve needle assembly.
  • the second ring will therefore apply the lifting force caused by the deformation of the containment ring to the valve needle assembly.
  • the pressure compensator element will therefore apply the lifting force to the valve needle assembly which is proportional to the fluid pressure inside the valve cavity.
  • the lifting force created by the pressure compensator element is always smaller than the force which is necessary to displace the valve needle away from the closing position so that the valve needle cannot be displaced away from the closing position only by the lifting force created by the pressure compensator element.
  • the lifting force of the pressure compensator element helps the actuator assembly to displace the valve needle away from the closing position.
  • the actuator assembly does not need to provide the displacement force which is necessary to displace the valve needle away from the closing position alone.
  • the force which is necessary to displace the valve needle away from the closing position is provided according to this embodiment by the pressure compensator element and the actuator assembly. Therefore, it is possible to use a conventional actuator assembly in combination with the pressure compensator element to displace the valve needle away from the closing position even if the fluid pressure inside the valve cavity increases beyond conventional operating pressures.
  • the lifting force is proportional to the fluid pressure inside the valve cavity which means that even if the fluid pressure is increased even further the lifting force generated by the pressure compensator element will also increase which means that even at very high fluid pressures inside the valve cavity it is possible to operate the fluid injector with conventional actuator assemblies. It can be even possible to operate the fluid injector without the so-called free lift concept. Due to the proportionality between the fluid pressure inside the fluid injector and the lifting force generated by the pressure compensator element, the force provided by the actuator assembly to displace the valve needle away from the closing position can be over the range of fluid pressures inside the cavity. Overall the actuator assembly complexity can be reduced compared to an actuator assembly which normally has to handle with such high fluid pressure inside the fluid injector without the aid of the pressure compensator element.
  • the valve cavity along its axial extension two different diameters.
  • the smaller diameter of the two different diameters is arranged closer to the outlet opening than the larger diameter so that a ring surface is formed on the valve cavity surface between the larger diameter and the smaller diameter.
  • the ring surface can for example be a flat ring surface or a truncated cone surface.
  • the first ring of the pressure compensator element is according to this embodiment configured to engage with the ring surface.
  • the first ring is according to one embodiment fixed to the ring surface or rests on the ring surface when the pressure compensator element is arranged in the fluid injector.
  • the valve cavity comprises according to this embodiment for example a step or a tapering area where the first ring can engage with the valve cavity.
  • the surface of the valve needle assembly could be for example a surface of the valve needle, a surface of a disc element which is fixed to the valve needle or a surface of the armature.
  • the first ring of the pressure compensator element is coupled to the valve housing by a form fit connection or by a press fit connection.
  • the second ring of the pressure compensator element is according to another embodiment coupled to the valve needle assembly by a form fit connection or by a press fit connection.
  • the press fit connections or the form fit connections are in particular simple and fast connections between the first ring of the pressure compensator element and the valve housing and the second ring and the valve needle assembly so that the manufacturing of the fluid injector with the pressure compensator element is simplified.
  • the pressure compensator element is preloaded when assembled in the fluid injector and when the valve needle is in the closed position.
  • the lifting force from the pressure compensator element is according to this embodiment also applied to the valve needle even when no fluid or fluid with ambient pressure is inside the valve cavity.
  • the pressure compensator element according to this embodiment is held at its predefined position by the closing force of the valve needle applied to the valve needle by a calibration spring which is configured to urge the valve needle in the closed position, wherein the calibration spring is according to this embodiment also configured to push the second ring of the pressure compensator element towards the outlet opening of the valve housing which causes an elastic deformation of the containment ring and preloads therefore the pressure compensator element.
  • the lifting force generated by the pressure compensator element between 0 Newton at 0 - 1 MPa of fluid pressure inside the valve cavity and 750 Newton at 150 MPa of fluid pressure inside the valve cavity.
  • the fluid injector comprising the pressure compensator element it is possible to operate the fluid injector at fluid pressures of 45 MPa or greater and of 200 MPa or lower. This is only possible because the pressure compensator element generates the lifting force which is proportional to the pressure inside the valve cavity.
  • Fig. 1 shows a fluid injector 100, wherein the fluid injector 100 comprises a valve housing 110, a valve needle assembly 115, an actuator assembly 140, and a disc part 150.
  • the valve needle assembly 115 comprises a valve needle 120 and an armature 130.
  • the valve housing 110 extends from an inlet opening 162 along a central longitudinal axis 180 to an outlet opening 164.
  • the valve housing 110 comprises a valve cavity 130 which defines a fluid path for fluid flowing through the valve housing 110 from the inlet opening 162 to the outlet opening 164.
  • the valve cavity 160 is defined by a valve cavity surface 170.
  • the valve cavity 160 is arranged coaxially with respect to the central longitudinal axis 118.
  • the valve cavity 160 further comprises along its axial extension at least two different diameters wherein the smaller one of the two diameters is arranged closer to the outlet opening 164 than the larger diameter. Therefore, the valve cavity surface 170 comprises a ring surface 172 which defines a step along the axial extension of the valve cavity 170.
  • the valve needle 120 is also arranged coaxially with respect to the central longitudinal axis 180.
  • the disc part 150 is arranged at the valve needle 120 and the disc part 150 is therefore part of the valve needle assembly 115.
  • the disc part 150 is for example a stop for the armature 130 when the armature 130 is not rigidly coupled to the valve needle 120.
  • the actuator assembly 140 is arranged to attract the armature 130 which will displace the valve needle 120 away from a closing position in which no fluid can flow out of the fluid injector 100.
  • the fluid injector 100 as shown in fig. 1 further comprises a pressure compensator element 200.
  • the pressure compensator element 200 is arranged in the valve cavity 160 and comprises a first ring 210, a second ring 220 and a containment ring 230.
  • the first ring 210 is configured to engage with the valve cavity surface 170. As shown in fig. 1 the first ring 210 contacts the ring surface 172 of the valve cavity surface 170.
  • the containment ring 230 is arranged at the first ring 210.
  • the containment ring 230 comprises an elastic material. As it can be seen in fig. 1 the containment ring 230 almost completely surrounds the first ring 210 except of the portion of the first ring 210 which is in contact with the valve cavity surface 170.
  • the first ring 210 as shown in fig.
  • the radial portion has the shape of a disc and the axial portion has the shape of a sleeve. Combined they have the shape of an L.
  • the radial portion extends from the radial inner end to the radial outer end.
  • the axial portion extends from the radial outer end of the radial portion towards the outlet opening 164 of the valve cavity 160, wherein one longitudinal end of the axial portion contacts the ring surface 172.
  • the second ring 220 as shown in fig. 1 comprises also a radial portion and an axial portion.
  • the radial portion extends from the radial outer end of the radial portion to the radial inner end of the radial portion, wherein the radial outer end of the radial portion of the second ring is arranged in the containment ring.
  • the axial portion extends from the radial inner end of the radial portion towards the fluid inlet opening 162 of the valve cavity 160, wherein one longitudinal end of the axial portion contacts the disc element 150.
  • the first ring 210 of the pressure compensator element 200 comprises a first contact surface 240 which is arranged to be in contact with the valve cavity surface 170.
  • the second ring 220 of the pressure compensator element 200 comprises a second contact surface 250 which is arranged to be in contact with the disc part 150 of the valve needle 120.
  • the pressure compensator element 200 is configured to force the second ring towards the inlet opening 162 of the valve cavity 160 when the containment ring 230 is deformed due to increasing fluid pressure inside the valve cavity 160.
  • Fig. 2 shows in a schematic manner a longitudinal section view of the pressure compensator element 200 according to a second exemplary embodiment.
  • the second exemplary embodiment shows that almost the entire second ring 220 of the pressure compensator element 200 is arranged in the containment ring 230. Only the portion of the second ring 220 which is arranged to engage with the valve needle assembly 115 is arranged outside of the containment ring 230.
  • FIG. 2 shows openings 260 in the second ring 220 and in the first ring 260 which are arranged to allow the fluid to flow from the inlet opening 162 of the valve cavity 160 through the openings 260 of the pressure compensator element 200 to the outlet opening 164 of the valve cavity.
  • Fig. 3 shows in a schematic manner a longitudinal section of a pressure compensator element 200 according to a third exemplary embodiment.
  • the third exemplary embodiment shows that the containment ring 230 of the pressure compensator element 200 is only arranged at the first ring 210 at the side of the radial portion of the first ring 210 which faces towards the outlet opening 164 of the valve cavity 160 when the pressure compensator element 200 is arranged in the valve cavity 160.
  • the containment ring 230 shown in fig. 3 is not arranged at the axial portion of the first ring 210 as for example shown in figs. 1 and 2 .
  • the arrangement of the containment ring on the first ring 210 of the pressure compensator element 200 is according to the embodiment shown in fig. 3 is particular simple. As it can be seen in fig. 3 only a portion of the radial portion of the second ring 220 of the pressure compensator element 200 is arranged in the containment ring 230. It is according to this embodiment in particular simple to transfer the deformation caused by the fluid pressure inside the valve cavity 160 to the second ring 220.

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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)

Claims (14)

  1. Injecteur de fluide (100) pour un moteur à combustion interne, l'injecteur de fluide (100) comprenant un logement de vanne (110) qui forme une cavité de vanne (160) à l'intérieur du logement de vanne (110) comprenant une ouverture d'entrée (162) et une ouverture de sortie (164) pour du fluide s'écoulant à travers l'injecteur de fluide (100) lorsque l'injecteur de fluide (100) est en fonctionnement, un ensemble pointeau de vanne (115) qui comprend un induit (130) et un pointeau de vanne (120), qui est disposé à l'intérieur de la cavité de vanne (160) et qui est déplaçable par rapport au logement de vanne (120) pour empêcher ou permettre l'écoulement de fluide hors de l'injecteur de fluide (100), et un ensemble d'actionnement (140) qui est conçu pour déplacer le pointeau de vanne (120),
    caractérisé en ce que
    l'injecteur de fluide (100) comprend, en outre, un élément de compensation de pression (200), l'élément de compensation de pression (200) s'étendant le long d'un axe longitudinal central (180) et comprenant :
    - un anneau de retenue (230) qui comprend un matériau élastique et est conçu pour se déformer élastiquement lorsque la pression agissant sur l'élément de compensation de pression (200) change ;
    - un premier anneau (210) qui est disposé au niveau de l'anneau de retenue (230) ou dans celui-ci au niveau d'une première partie de l'anneau de retenue (230) et s'étend hors de l'anneau de retenue (230) ;
    - un second anneau (220) qui est disposé au niveau de l'anneau de retenue (230) ou dans celui-ci au niveau d'une seconde partie de l'anneau de retenue (230) et s'étend hors de l'anneau de retenue (230), la seconde partie de l'anneau de retenue (230) étant disposée à une position axiale différente au niveau de l'anneau de retenue (230) relativement à la première partie de l'anneau de retenue (230), de telle sorte qu'une déformation élastique de l'anneau de retenue (230) résultant d'un changement de la pression agissant sur l'élément de compensation de pression (200) se traduit par un déplacement axial de la première partie de l'anneau de retenue (230) relativement à la seconde partie de l'anneau de retenue (230) et donc par un déplacement axial du premier anneau (210) relativement au second anneau (220),
    l'élément de compensation de pression (200) étant disposé dans la cavité de vanne (160), et
    le premier anneau (210) de l'élément de compensation de pression (200) étant conçu pour être placé en butée contre une surface de cavité de vanne (170) et le second anneau (220) étant conçu pour être placé en butée contre l'ensemble pointeau de vanne (115), la première partie de l'anneau de retenue (230) étant disposée plus près de l'ouverture d'entrée (162) que la seconde partie de l'anneau de retenue (230) de telle sorte que la déformation élastique de l'anneau de retenue (230) résultant d'un changement de la pression du fluide agissant sur l'élément de compensation de pression (200) à l'intérieur de la cavité de vanne (160) se traduit par une force de soulèvement appliquée par l'élément de compensation de pression (200) à l'ensemble pointeau de vanne (115) lorsque le pointeau de vanne (120) se trouve dans une position fermée.
  2. Injecteur de fluide (100) selon la revendication 1, dans lequel le premier anneau (210) comprend une partie radiale qui s'étend dans une direction radiale et une partie axiale qui s'étend dans une direction axiale, la partie axiale s'étendant à partir d'une extrémité radiale de la partie radiale du premier anneau (210),
    dans lequel le second anneau (220) comprend une partie radiale qui s'étend dans la direction radiale et une partie axiale qui s'étend dans la direction axiale, la partie axiale s'étendant à partir d'une extrémité radiale de la partie radiale du second anneau (220),
    dans lequel la partie radiale du premier anneau (210) est disposée au moins partiellement au niveau de la première partie de l'anneau de retenue (230) ou dans celle-ci et la partie radiale du second anneau (220) est disposée au moins partiellement au niveau de la seconde partie de l'anneau de retenue (230) ou dans celle-ci, et
    dans lequel la partie axiale du premier anneau (210) et la partie axiale du second anneau (220) s'étendent dans des directions opposées.
  3. Injecteur de fluide (100) selon l'une quelconque des revendications précédentes, dans lequel la partie axiale du premier anneau (210) s'étend à partir de l'extrémité radiale extérieure de la partie radiale du premier anneau (210) et la partie axiale du second anneau (220) s'étend à partir de l'extrémité radiale intérieure de la partie radiale du second anneau (220), et
    dans lequel la partie axiale du premier anneau (210) s'étend dans une direction allant vers la seconde partie de l'anneau de retenue (230) au-delà de l'anneau de retenue (230) et au-delà du second anneau (220) et la partie axiale du second anneau (220) s'étend dans une direction allant vers la première partie de l'anneau de retenue (230) au-delà de l'anneau de retenue (230) et au-delà du premier anneau (220).
  4. Injecteur de fluide (100) selon la revendication 3, dans lequel la partie axiale du premier anneau (210) est disposée partiellement au niveau de la première partie de l'anneau de retenue (230), dans lequel la seconde partie de l'anneau de retenue (230) s'étend plus loin en direction de l'extrémité longitudinale libre de la partie axiale du premier anneau (210) que la première partie de l'anneau de retenue (230), et/ou dans lequel la partie axiale du second anneau (220) est disposée partiellement au niveau de la seconde partie de l'anneau de retenue (230), dans lequel la première partie de l'anneau de retenue (230) s'étend plus loin en direction de l'extrémité longitudinale libre de la partie axiale du second anneau (220) que la seconde partie de l'anneau de retenue (230).
  5. Injecteur de fluide (100) selon l'une quelconque des revendications précédentes, dans lequel le premier anneau (210) et/ou le second anneau (220) est/sont partiellement implanté(s) dans l'anneau de retenue (230).
  6. Injecteur de fluide (100) selon l'une quelconque des revendications précédentes, dans lequel l'anneau de retenue est constitué d'un matériau choisi dans un groupe composé d'un matériau de caoutchouc, d'une matière plastique et d'un matériau élastomère.
  7. Injecteur de fluide (100) selon l'une quelconque des revendications 3 à 6, dans lequel la cavité de vanne (160) présente, le long de son étendue axiale, deux diamètres différents, le plus petit des diamètres étant situé plus près de l'ouverture de sortie (164) que le plus grand des diamètres de telle sorte qu'une surface annulaire (172) est formée sur la surface de cavité de vanne (170) entre le plus grand des diamètres et le plus petit des diamètres, l'extrémité longitudinale de la partie axiale du premier anneau (210) de l'élément de compensation de pression (230) qui s'étend au-delà du second anneau (220) venant en contact avec la surface annulaire (172).
  8. Injecteur de fluide (100) selon l'une quelconque des revendications 3 à 6, dans lequel l'extrémité longitudinale de la partie axiale du second anneau (220) de l'élément de compensation de pression (200) qui s'étend au-delà du premier anneau (210) vient en contact avec une surface de l'ensemble pointeau de vanne (115).
  9. Injecteur de fluide (100) selon l'une quelconque des revendications précédentes, dans lequel le premier anneau (210) de l'élément de compensation de pression (200) est accouplé au logement de vanne (110) par un assemblage par complémentarité de forme ou un assemblage à ajustement serré.
  10. Injecteur de fluide (100) selon l'une quelconque des revendications précédentes, dans lequel le second anneau (220) de l'élément de compensation de pression (200) est accouplé à l'ensemble pointeau de vanne (115) par un assemblage par complémentarité de forme ou un assemblage à ajustement serré.
  11. Injecteur de fluide (100) selon l'une quelconque des revendications précédentes, dans lequel l'ensemble pointeau de vanne (115) comprend un élément discoïde (150) qui est solidarisé avec le pointeau de vanne (120) et dans lequel le second anneau (220) de l'élément de compensation de pression (200) est conçu pour être placé en butée contre l'élément discoïde (150) de l'ensemble pointeau de vanne (115).
  12. Injecteur de fluide (100) selon l'une quelconque des revendications précédentes, dans lequel l'élément de compensation de pression (200) est présollicité lorsque le pointeau de vanne (120) se trouve dans la position fermée.
  13. Injecteur de fluide (100) selon l'une quelconque des revendications précédentes, dans lequel la force de soulèvement générée par l'élément de compensation de pression (200) est comprise entre 0 N pour 0 à 1 MPa de pression de fluide à l'intérieur de la cavité de vanne (160) et 750 N pour 150 MPa de pression de fluide à l'intérieur de la cavité de vanne (160).
  14. Injecteur de fluide (100) selon l'une quelconque des revendications précédentes, l'injecteur de fluide (100) étant conçu pour fonctionner à des pressions de fluide de 45 MPa ou plus et de 200 MPa ou moins.
EP19206326.1A 2019-10-30 2019-10-30 Injecteur de fluide pour moteur à combustion interne comprenant un élément compensateur de pression Active EP3816431B1 (fr)

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EP19206326.1A EP3816431B1 (fr) 2019-10-30 2019-10-30 Injecteur de fluide pour moteur à combustion interne comprenant un élément compensateur de pression

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EP3816431B1 true EP3816431B1 (fr) 2023-10-18

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Publication number Priority date Publication date Assignee Title
US2538658A (en) * 1945-10-31 1951-01-16 Ohio Rubber Co Resilient mounting for motors and the like
US6752389B2 (en) * 2001-10-30 2004-06-22 Lord Corporation Mount having integrated damper and load carrying spring
EP2535552B1 (fr) * 2011-06-15 2015-02-25 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
WO2014036131A1 (fr) * 2012-08-28 2014-03-06 Lord Corporation Élément d'isolation de vibrations

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