EP2863044B1 - Soupape d'injection - Google Patents

Soupape d'injection Download PDF

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Publication number
EP2863044B1
EP2863044B1 EP13188793.7A EP13188793A EP2863044B1 EP 2863044 B1 EP2863044 B1 EP 2863044B1 EP 13188793 A EP13188793 A EP 13188793A EP 2863044 B1 EP2863044 B1 EP 2863044B1
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EP
European Patent Office
Prior art keywords
valve
armature
chamber
injection valve
needle
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.)
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Application number
EP13188793.7A
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German (de)
English (en)
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EP2863044A1 (fr
Inventor
Xaver GEBHARDT
Erwin Achleitner
Anatoliy Lyubar
Marco Mechi
Willibald SCHÜRZ
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Continental Automotive GmbH
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Continental Automotive GmbH
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Priority to EP13188793.7A priority Critical patent/EP2863044B1/fr
Publication of EP2863044A1 publication Critical patent/EP2863044A1/fr
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Publication of EP2863044B1 publication Critical patent/EP2863044B1/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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
    • F02M51/066—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic

Definitions

  • the invention is related to an injection valve, in particular to a direct driven electro-magnetic outward opening injection valve.
  • DE 102010002845 A1 relates to a fuel injector, in particular a common rail injector, for injecting fuel into a combustion chamber of an internal combustion engine, having an injection valve element that can be displaced between a closed position and an open position opening a nozzle hole arrangement, it being possible for the injection valve element to be driven by a magnetic armature assembly via a coupling chamber filled with a pressurized medium.
  • the magnetic armature assembly provision is made for the magnetic armature assembly to have at least two magnetic armatures which can be moved relative to one another and the end faces of which project into the coupling chamber.
  • EP 2369165 A2 discloses an injector which has two actuator units for operating a nozzle needle, and an injection opening closed by stroke movement of the needle.
  • the units are controlled independent of each other and coupled to the needle over a coupling device.
  • the coupling device has a hydraulic coupling volume that is limited by two effective surfaces. One of the surfaces is formed at a transmission element acting together with the actuator units, such that force intensification is caused in a phase of opening stroke of the needle and path intensification is caused in another phase.
  • the injection valve of EP 2365205 A1 comprises an injector body with a central longitudinal axis and a first cavity.
  • the injection valve also comprises a valve body, a valve needle, an armature and an actuation unit.
  • the valve body comprises a second cavity.
  • the valve needle is axially movable in the second cavity and comprises a first radial surface.
  • the armature is decoupled from the valve needle and is axially movable at least partially within the first cavity and comprises a radial armature surface.
  • the first radial surface and the radial armature surface are facing each other and feature a contact area of a predetermined size if the valve needle is in a predetermined axial position.
  • the actuator unit is operable to magnetically actuate the armature to move axially.
  • DE 102007001363 A1 relates to an injector for injecting fuel into combustion chambers of internal combustion engines, in particular a common rail injector, having a high-pressure region and having a valve element which is axially adjustable between a closed position and an open position in which the flow of fuel is enabled.
  • the valve element comprises a first partial element and at least one separate second partial element, which partial elements are hydraulically coupled to one another by means of a coupler space, and that the coupler space is hydraulically connected only in one axial direction to the high-pressure region of the injector.
  • DE 102010027278 A1 relates to a thermal volume-neutral stroke transmitter for using especially with a metering valve, without the need for a hydraulic compensator.
  • a first and/or second displacement body is/are positioned in a stroke transmitter, for displacing said liquid.
  • Such a closed system of three materials can still be designed in such a way that it remains pressure-free during temperature changes.
  • Direct driven electro-magnetic outward opening injection valves have an injection nozzle that is opened in an outward direction by lifting a valve needle from a seat plate by the action of an electro-magnetic actuator.
  • Such outward opening injectors can be very sensitive to parameter changes and therefore difficult to control in stable opening positions. For instance, they can be very sensitive to pressure deviations due to a high nozzle sealing diameter.
  • an outward opening injector has a linear flow-lift characteristic with a high flow so that small deviations in the needle lift lead to high quantity deviations.
  • the injector does not reach a stable position at another level when the opening force differs but begins to oscillate, which leads to non-linearities in the so-called Ti-Map, which represents the dependency of the injection quantity from the opening time ("Ti") of the valve. Further, it is very difficult to control an outward opening injector with an extended ballistic current profile. By increasing not or too much the hold current value, the known outward opening injectors usually do not reach a stable position.
  • the needle displacement is defined by a damped oscillation until the needle rests in a stable position.
  • An object to be solved is to provide an injection valve that avoids or at least reduces the above-mentioned problems.
  • an injection valve comprises a fluid inlet tube with a recess.
  • the fluid inlet tube is connected to a valve assembly, which comprises a valve body having a central longitudinal axis.
  • the central longitudinal axis defines an "axial direction" so that a movement in an axial direction denotes a movement along the central longitudinal axis.
  • the valve body comprises a cavity with a fluid outlet portion.
  • a valve needle is arranged in the cavity of the valve body and is movable in the cavity along the central longitudinal axis between a closing position and opening positions, the valve needle preventing a fluid flow through the fluid outlet portion in a closing position and releasing the fluid flow through the fluid outlet portion in other positions which are the opening positions.
  • the injection valve comprises an electro-magnetic actuator unit being designed to actuate an armature, which is arranged in the cavity and is axially moveable relative to the valve needle along the longitudinal axis.
  • the armature is hydraulically coupled to the valve needle and can move the valve needle to an opening position by exerting a hydraulic force when being actuated by the electro-magnetic actuator unit.
  • the armature moves the valve needle to an opening position completely by a hydraulic force.
  • the armature has no direct or indirect mechanical connection or contact to the valve needle for actuating the valve needle but acts on the valve needle only by pressing on a fluid, which, in turn, presses on the valve needle.
  • the injection valve comprises a coupling member hydraulically coupling the armature to the valve needle.
  • the coupling member is arranged between the armature and the valve needle and forms a first chamber with the armature and a second chamber with the valve needle, wherein the first and second chambers are filled with a fluid and the first chamber and the second chamber are hydraulically coupled by an orifice in the coupling member.
  • the armature can comprise a pin, which forms a piston in the first chamber.
  • An end portion of the valve needle distal from the fluid outlet portion can form a piston in the second chamber.
  • an injection valve as described herein which in particular can be embodied as a direct driven electro-magnetic outward opening injection valve and which can be driven completely in a so-called ballistic mode, which means that during the complete opening time the valve needle is in motion and that no stopper is required, shows a linear Ti-map behavior.
  • irregularities in the Ti-map as described above, can be avoided.
  • Figure 1 shows an injection valve 100 according to a comparative example.
  • the injection valve 100 is configured as an injection valve of outward opening type and may in particular be suitable for dosing fuel to an internal combustion engine.
  • the valve of Figure 1 is shown in order to describe the general principle of a direct driven electro-magnetic outward opening injection valve.
  • the injection valve 100 comprises a valve assembly 1 and an inlet tube 2 hydraulically and mechanically connected to the valve assembly 1.
  • the valve assembly 1 includes a valve body 10 with a central longitudinal axis L.
  • the valve body 10 further comprises a cavity 11.
  • the cavity 11 accommodates a valve needle 4 and an armature 5.
  • a pin 50 is arranged along the longitudinal axis L and is fixedly coupled to the armature 5, for example by a press-fit connection and/or a welding connection. Alternatively, the pin 50 can be a part of the armature 5 so that the armature 5 and the pin 50 are a single piece.
  • the pin 50 is partly in contact with an inner side of the valve body 10 and serves as guide for the armature 5.
  • the valve needle 4 as well as the armature 5 together with the pin 50 are movable along an axial direction, i.e. in a direction running parallel to the central longitudinal axis L.
  • the cavity 11 is hydraulically coupled to a recess 20 of the fluid inlet tube 2 and a fuel connector.
  • the fuel connector is designed to be connected to a high pressure fuel chamber of an internal combustion engine, in which the fuel is stored under high pressure.
  • a main spring 12 is arranged in the cavity 11 between a ring element 13, which is fixedly coupled to the valve needle 4, and a step-like part of the valve body 10.
  • the ring element 13 can also be a part of the valve needle 4.
  • the main spring 12 is arranged and configured to act on the valve needle 4 to move the valve needle 4 along the axial direction into its closing position, i.e. in an upward direction in Figure 1 .
  • a fluid outlet portion 14 is formed, which is closed or opened depending on the axial position of the valve needle 4.
  • the valve needle 4 has a groove 40 which is of an annular shape and which allows fluid to flow to the fluid outlet portion 14.
  • the fluid outlet portion 14 is closed or opened depending on the axial position of the valve needle 4.
  • the valve needle 4 At an axial end of the valve needle 4 facing away from the fluid inlet tube 2, the valve needle 4 has a tip 41.
  • the tip 41 is conical. The tip 41 cooperates with the valve body 11 to prevent or enable the fluid flow through the fluid outlet portion 14.
  • the fluid is led from the fluid inlet tube 2 into the cavity 11, and, in particular, through the openings 51 of the armature 5 to the lower part of the valve needle 4, to be led on through the groove 40 to the fluid outlet portion 14 near the tip 41 of the valve needle 4.
  • the valve needle 4 prevents a fluid flow through the fluid outlet portion 14 in the valve body 11 in a closing position of the valve needle 4.
  • the valve assembly 1 is provided with an electro-magnetic actuator unit 3.
  • the electro-magnetic actuator unit 3 comprises a coil 30, which is preferably arranged inside a housing 31, which can be part of the valve body 10.
  • the coil 30 can be electrically connected via a connector 32.
  • the electro-magnetic actuator unit 3 comprises the armature 5.
  • the coil 30 is arranged such as to interact with the armature 5, in particular to move the armature 5 along the axial direction into the direction of the fluid outlet portion 14.
  • the injection valve 100 comprises a calibration spring 6 that is arranged on the side of the armature 5 which faces away from the fluid outlet portion 14 and which interacts with the armature 5.
  • the electro-magnetic actuator unit 3 comprises a pole piece 33, which may also be part of the housing 31. In the closing position of the injection valve 100, there is a gap (not shown) between the armature 5 and the pole piece 33.
  • the actuator unit 3 exerts an electro-magnetic force on the armature 5.
  • the armature 5 is attracted by the electro-magnetic actuator unit 3 and moves in axial direction towards the fluid outlet portion 14, thereby decreasing the gap between the armature 5 and the pole piece 33.
  • the armature 5 takes along the pin 50, which pushes against an end portion 42 of the valve needle 4 distal from the fluid outlet, portion 14.
  • the armature 5 and the pin 51 cooperate with the valve needle 4 such that at least part of the lift generated by the coil 30 with respect to the armature 5 is transferred to the valve needle 4, thereby moving the valve needle 5 in an opening position.
  • the main spring 12 can force the valve needle 4 to move along the axial direction into its closing position. It depends on the force balance between the force exerted on the valve needle 4 by the actuator unit 3 and the force exerted on the valve needle 4 by the main spring 12 whether the valve needle 4 moves into its closing position or not. In the case that the valve needle 4 moves into its closing position, the pin 51 and thus the armature 5 may decouple from the valve needle 4 due to their inertia.
  • a direct driven outward opening injection valve that uses a mechanical contact between the armature 5 and the valve needle 4, as shown in Figure 1 , is very sensitive on parameter changes and difficult to control in stable positions.
  • Figure 2 shows a partial view of an injection valve 101 that allows reducing or even avoiding such problems.
  • the injection valve 101 is also a direct driven electro-magnetic outward opening injection valve. Except for the differences explained in the following, the injection valve 101 can have the same or similar elements as explained in connection with the injection valve 100, even though not all elements of the injection valve 100 are shown and explained in connection with Figure 2 . Consequently, references numbers, which are referred to in the following but not shown in Figure 2 , refer to the description of Figure 1 .
  • the injection valve 101 comprises a valve assembly 1 and a fluid inlet tube 2 with a recess 20, the valve assembly 1 and the fluid tube 2 being connected to each other.
  • the valve assembly 1 comprises a valve body 10 with a central longitudinal axis L, wherein the valve body 10 comprises a cavity 11 with a fluid outlet portion 14.
  • a valve needle 4 is arranged in the cavity 11 and movable along the central longitudinal axis L between a closing position and opening positions, so that the valve needle 4 can prevent a fluid flow through the fluid outlet portion 14 in the closing position and release the fluid flow through the fluid outlet portion 14 in opening positions.
  • the injection valve 101 further comprises an electro-magnetic actuator unit 3 with an electro-magnetic coil 30 being designed to actuate an armature 5, which is arranged in the cavity 11.
  • the armature 5, which may comprise a pin 50, is axially moveable relative to the valve needle 4 along the longitudinal axis L.
  • the armature 5 of the injection valve 101 is hydraulically coupled to the valve needle 4 and moves the valve needle 4 to an opening position by exerting a hydraulic force when being actuated by the electro-magnetic actuator unit 3.
  • the armature 5 is hydraulically coupled to the valve needle 4 by a coupling member 8 arranged between the armature 5 and the valve needle 4.
  • the coupling member 8, which is arranged in the cavity 11, may be press-fitted into the valve body 10 or otherwise attached to the valve body 10.
  • the coupling member 8 may even be a part of the valve body 10.
  • the coupling member 8 forms a first chamber 81 with the armature 5.
  • the pin 50 of the armature 5 can form a piston in the first chamber 81.
  • the coupling member 8 further forms a second chamber 82 with the valve needle 4.
  • the end portion 42 of the valve needle 4 distal from the fluid outlet portion 14 may form a piston in the second chamber 82.
  • the first chamber 81 and the second chamber 82 are hydraulically coupled by an orifice 80 in the coupling member 8, which forms a constriction between the chambers 81, 82.
  • the first and second chamber 81, 82 are filled with a fluid which in the shown embodiment is the fluid to be injected by the injections valve 101 and which may be for example fuel.
  • the first and second chamber 81, 82 are filled with the fluid through gaps 83, 84 which are between the coupling member 8 and the armature 5 and between the coupling member 8 and the valve needle 4, respectively, and which connect the chambers 81, 82 to the cavity 11.
  • the gaps 83, 84 are as small as possible to avoid too much leakage but are large enough so that fluid can stream into the chambers 81, 82.
  • the armature 5 moves towards the valve needle 4 and the pin 50 moves into the first chamber 81, thereby increasing the pressure inside the first chamber 81. Due to the connection between the first and second chamber 81, 82 by means of the orifice 80, also the pressure in the second chamber 82 increases. Caused by this pressure increase, the force on the valve needle 4 increases in the opening direction so that the hydraulic force exerted by the armature 5 on the valve needle 4 moves the valve needle 4 in an opening position.
  • the injection valve 101 further comprises a spring 89, which is designed and such arranged in the valve body 11 to act on the armature 5 to move the armature 5 away from the valve needle 4 and the electro-magnetic actuator unit 3. In particular it is operable to move the armature 5 axially away from the pole piece 33.
  • the spring 89 is configured and such arranged in the valve body 11 to increase the gap 35 between the armature 5 and the electro-magnetic actuator unit 3 when the actuator unit 3 is not operated.
  • the injection valve 101 can furthermore comprise a stopping member (not shown) for stopping the armature 5 in a closing position to which the armature 5 is pressed by the spring 89.
  • a main spring 12 is designed and such arranged in the cavity 11 to act on the valve needle 4 to move the valve needle 4 along the longitudinal axis L into its closing position and/or to retain the valve needle 4 in its closing position when the actuator unit 3 is not operated.
  • a diameter of the first chamber 81 may be at least five times as large, preferably at least ten times as large, particularly preferably at least 15 times as large as a diameter of the orifice 80.
  • the diameter of the pin 50 in the first chamber may have a value of 3/4 or less, preferably of 2/3 or less of the diameter of the end portion 42 of the valve needle 4 in this or in other embodiments.
  • the hydraulic coupling between the armature 5 and the valve needle 4 may have a mechanical advantage of 2 or more, preferably of 3 or more. The mechanical advantage is in particular the ratio of the distance travelled by the armature 5 to the distance travelled by the valve needle 4.
  • the initial gap 35 between the armature 5 and the pole piece 33 can be increased in the injection valve 101 compared to the injection valve 100, since the magnetic force is proportional to the reciprocal square of the size of the gap 35.
  • the size of the initial gap 35 may be 200 ⁇ m or larger, preferably 300 ⁇ m or larger.
  • the air gap 35 in the injection valve 101 is large enough so that the influence of the gap 35 on the magnetic force is as small as possible and so that the injection valve 101 can be driven completely in a ballistic mode, which means that during the complete opening time the valve needle 4 and in particular also the armature 5 is/are in motion and that no stopper is required.
  • the armature 5 is always spaced apart from the pole piece 33 throughout the operation of the injection valve 101.
  • injection valve 101 are suitable also for other embodiments of the injection valve either alone or in combination.
  • Figure 3 shows the Ti-map for the injection valve 101 for a fluid pressure of 100 bar. Due to the absence of a stopper and the possibility to completely drive the injection valve 101 in a ballistic mode, the Ti-map shows a linear behavior of the injection quantity IQ depending on the injection time Ti without ripples or other irregularities.
  • Figure 4 shows the needle lift NL during a time T for injection times Ti between 0.22 ms and 2.5 ms, whereas in Figure 5 the corresponding armature lift AL is shown.
  • the maximum needle lift is approximately 60 to 70 ⁇ m. From both Figures 4 and 5 , it becomes apparent that the valve needle 4 and the armature 5 are completely driven in a ballistic mode.
  • Figure 6 shows the Ti-map for various pressures between 5 bar and 100 bar. As can be seen, independently from the fluid pressure the Ti-map always shows a linear behavior.
  • a force of approximately 56 N is needed at the valve needle 4 in order to open the valve needle 4.
  • the required pressure increase in the chambers 81, 82 is approximately 80 bar, which leads to a required magnetic force for opening of approximately 20 N.
  • the peak and hold current of the coil 30 has to be increased with decreasing pressure.
  • a force of approximately 158 N is needed at the valve needle 4 in order to open the valve needle 4, which leads to a required pressure increase in the chambers 81, 82 of approximately 220 bar.
  • the simulations have also revealed that the needle opening velocity at the first 10 ⁇ m needle lift is higher compared to the injector concept shown in Figure 1 , whereas the needle opening velocity at higher lifts is lower than the velocity for the injector concept of Figure 1 , since in the injection valve 101 the armature is accelerated alone, i.e. without the valve needle, by the coil until the pressure is reached in the chambers 81, 82 to open the needle.
  • Figure 7 shows a further embodiment for an injection valve 102, which, in contrast to the injection valve 101 of Figure 2 , has the first chamber 81 and the second chamber 82 sealed from the cavity 11 by sealing members 85 between the coupling member 8 and the armature 5 and between the coupling member 8 and the valve needle 4.
  • the sealing members 85 can be O-rings.
  • the chambers 81, 82 are sealed form the cavity 11, the chambers 81, 82 have to be filled when the injection valve 102 is manufactured.
  • constraints regarding the clearances of the gaps 83, 84 and regarding the length of the gaps 83, 84, which influence the functionality and stability of the injection valve 101 of Figure 2 can possibly be avoided by the embodiment shown in Figure 7 .

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

Claims (14)

  1. Soupape d'injection (101, 102), comprenant :
    un ensemble soupape (1) et un tube d'admission de fluide (2) avec un renfoncement (20) relié à l'ensemble soupape (1), l'ensemble soupape (1) comprenant un corps de soupape (10) ayant un axe longitudinal central (L), le corps de soupape (10) comprenant une cavité (11) avec une partie de sortie de fluide (14), un pointeau de soupape (4) agencé dans la cavité (11) et mobile le long de l'axe longitudinal central (L) entre une position fermée et des positions ouvertes, le pointeau de soupape (4) empêchant un écoulement de fluide à travers la partie de sortie de fluide (14) dans la position fermée et libérant l'écoulement de fluide à travers la partie de sortie de fluide (14) dans les positions ouvertes ; une unité d'actionneur électromagnétique (3) étant conçue pour actionner une armature (5) agencée dans la cavité (11) et mobile dans le plan axial par rapport au pointeau de soupape (4) le long de l'axe longitudinal (L) ;
    dans laquelle :
    - l'armature (5) est couplée sur le plan hydraulique au pointeau de soupape (4) et peut être actionnée pour déplacer le pointeau de soupape (4) vers une position ouverte en exerçant une force hydraulique lors de l'actionnement par l'unité d'actionneur électromagnétique (3) ;
    caractérisée en ce que :
    - l'armature (5) est couplée sur le plan hydraulique au pointeau de soupape (4) par le biais d'un élément de couplage (8) agencé entre l'armature (5) et le pointeau de soupape (4), l'élément de couplage (8) formant une première chambre (81) avec l'armature (5) et une seconde chambre (82) avec le pointeau de soupape (4), la première chambre (81) et la seconde chambre (82) étant couplées sur le plan hydraulique par le biais d'un orifice (80) placé dans l'élément de couplage (8), l'orifice (80) formant un rétrécissement entre la première chambre (81) et la seconde chambre (82).
  2. Soupape d'injection (101, 102) selon la revendication précédente, dans laquelle un diamètre de la première chambre (81) est au moins cinq fois supérieur au diamètre de l'orifice (80).
  3. Soupape d'injection (101, 102) selon l'une quelconque des revendications précédentes, dans laquelle l'élément de couplage (8) est agencé dans la cavité (11) et fixé par ajustement serré ou d'une autre façon au corps de soupape (10).
  4. Soupape d'injection (101, 102) selon l'une quelconque des revendications précédentes, dans laquelle l'armature (5) comprend une broche (50) formant un piston dans la première chambre (81) et dans laquelle une partie d'extrémité (42) du pointeau de soupape (4), distale par rapport à la partie de sortie de fluide (14), forme un piston dans la seconde chambre (82).
  5. Soupape d'injection (101, 102) selon la revendication précédente, dans laquelle le diamètre de la broche (50) située dans la première chambre (81) a une valeur de 3/4 ou moins du diamètre de la partie d'extrémité (42) du pointeau de soupape (4).
  6. Soupape d'injection (101, 102) selon l'une quelconque des revendications précédentes, dans laquelle l'unité d'actionneur électromagnétique (3) comprend une pièce polaire (33) et dans laquelle l'interstice maximal entre la pièce polaire (33) et l'armature (5) a une taille de 200 µm ou davantage.
  7. Soupape d'injection (101, 102) selon la revendication précédente, dans laquelle l'armature (5) est toujours placée à une certaine distance de la pièce polaire (33) pendant tout l'actionnement de la soupape d'injection (101, 102).
  8. Soupape d'injection (101, 102) selon l'une quelconque des revendications précédentes, dans laquelle la première chambre (81) et la seconde chambre (82) sont reliées à la cavité (11) par les interstices (83, 84) prévus entre l'élément de couplage (8) et l'armature (5) et entre l'élément de couplage (8) et le pointeau de soupape (4).
  9. Soupape d'injection (101, 102) selon l'une quelconque des revendications 1 à 7, dans laquelle la première chambre (81) et la seconde chambre (82) sont scellées par rapport à la cavité (11) par des éléments d'étanchéité (85), entre l'élément de couplage (8) et l'armature (5) et entre l'élément de couplage (8) et le pointeau de soupape (4).
  10. Soupape d'injection (101, 102) selon la revendication précédente, dans laquelle les éléments d'étanchéité (85) sont des joints toriques.
  11. Soupape d'injection (101, 102) selon l'une quelconque des revendications précédentes, dans laquelle un ressort (89) est configuré et agencé de façon à agir, dans le corps de soupape (11), sur l'armature (5) pour écarter l'armature (5) du pointeau de soupape (4).
  12. Soupape d'injection (101, 102) selon la revendication précédente, dans laquelle le ressort (89) est configuré et agencé de façon à accroître, dans le corps de soupape (11), un interstice (35) entre l'armature (5) et l'unité d'actionneur électromagnétique (3).
  13. Soupape d'injection (101, 102) selon l'une quelconque des revendications précédentes, dans laquelle un ressort principal (12) est configuré et agencé de façon à agir, dans la cavité (11), sur le pointeau de soupape (4) pour déplacer le pointeau de soupape (4) le long de l'axe longitudinal (L) dans sa position fermée et/ou pour retenir le pointeau de soupape (4) dans sa position fermée.
  14. Soupape d'injection (101, 102) selon l'une quelconque des revendications précédentes, dans laquelle la soupape d'injection (101, 102) est une soupape d'injection électromagnétique à entraînement direct s'ouvrant vers l'extérieur.
EP13188793.7A 2013-10-15 2013-10-15 Soupape d'injection Active EP2863044B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13188793.7A EP2863044B1 (fr) 2013-10-15 2013-10-15 Soupape d'injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13188793.7A EP2863044B1 (fr) 2013-10-15 2013-10-15 Soupape d'injection

Publications (2)

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EP2863044A1 EP2863044A1 (fr) 2015-04-22
EP2863044B1 true EP2863044B1 (fr) 2016-06-29

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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0903490B1 (fr) * 1997-03-25 2003-09-24 Isuzu Motors Limited Injecteur
DE102007001363A1 (de) * 2007-01-09 2008-07-10 Robert Bosch Gmbh Injektor zum Einspritzen von Kraftstoff in Brennräume von Brennkraftmaschinen
EP2123899B1 (fr) * 2008-05-23 2011-10-26 Delphi Technologies, Inc. Injecteur de carburant avec actionneur à solénoïde
EP2365205B1 (fr) * 2010-03-03 2013-05-15 Continental Automotive GmbH Soupape d'injection
DE102010002845A1 (de) * 2010-03-15 2011-09-15 Robert Bosch Gmbh Kraftstoff-Injektor
DE102010003334A1 (de) * 2010-03-26 2011-09-29 Robert Bosch Gmbh Kraftstoffinjektor
DE102010027278B4 (de) * 2010-07-15 2020-07-02 Metismotion Gmbh Thermisch volumenneutraler Hubübertrager sowie Dosierventil mit einem solchen Hubübertrager und Verwendung des Dosierventils

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Publication number Publication date
EP2863044A1 (fr) 2015-04-22

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