EP2539575B1 - Injecteur de carburant avec un ensemble aiguille d'injecteur - Google Patents

Injecteur de carburant avec un ensemble aiguille d'injecteur Download PDF

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Publication number
EP2539575B1
EP2539575B1 EP11703208.6A EP11703208A EP2539575B1 EP 2539575 B1 EP2539575 B1 EP 2539575B1 EP 11703208 A EP11703208 A EP 11703208A EP 2539575 B1 EP2539575 B1 EP 2539575B1
Authority
EP
European Patent Office
Prior art keywords
coupler
piston
nozzle needle
pressure
fuel injector
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.)
Not-in-force
Application number
EP11703208.6A
Other languages
German (de)
English (en)
Other versions
EP2539575A1 (fr
Inventor
Nadja Eisenmenger
Hans-Christoph Magel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2539575A1 publication Critical patent/EP2539575A1/fr
Application granted granted Critical
Publication of EP2539575B1 publication Critical patent/EP2539575B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • 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
    • F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/494—Fluidic or fluid actuated device making

Definitions

  • the invention relates to a fuel injector for a fuel injection system, in particular a common rail injection system, for injecting fuel into the combustion chamber of an internal combustion engine having the features of the preamble of claim 1. Furthermore, the invention relates to a method for producing and / or assembling a nozzle needle Assembly, which can be used in particular in such a fuel injector.
  • a fuel injector for example, from the published patent application DE 10 2008 002 417 A1 out.
  • the fuel injector described herein includes a piezo actuator housed in a relatively pressure-free actuator chamber.
  • the piezoelectric actuator is hydraulically coupled to the nozzle needle of the injector such that the nozzle needle assumes its closed position when the piezoelectric actuator is discharged electrically and, on connection of the piezoelectric actuator, transitions to an electrical voltage source in the open position. That is, the opening stroke of the nozzle needle takes place in the opposite direction to Aktorhub.
  • the coupling device thus causes a reversal of the direction of movement.
  • the piezoelectric actuator is electrically charged only in the short injection phases and is electrically discharged in the longer periods of rest of the fuel injector and thus subject to a lower stress.
  • This increases the life of the piezoelectric actuator provided for actuating the nozzle needle.
  • As the life of the piezoelectric actuator extending measure also affects the arrangement of the piezoelectric actuator in a relatively pressure-free actuator chamber out. The actuator is thus not acted upon by the high pressure fuel. A high-pressure resistant sealing of the piezoelectric actuator is therefore also unnecessary.
  • the specified in the published specification device for hydraulic coupling of the piezoelectric actuator with the nozzle needle also allows a path translation between the stroke of the actuator and the stroke of the nozzle needle by the displacer effective cross sections of the two pistons of the coupling device are dimensioned significantly different. As a result, a sufficient Düsennadelhub can be realized even with a small Aktorhub.
  • the invention is based on the object, a fuel injector of the aforementioned type such that there is a greater freedom in terms of the surface design of the coupler piston to optimize a path translation.
  • the structure of the coupler and the connection of the coupler to the nozzle needle to be simplified to provide a simple and inexpensive to produce fuel injector.
  • the coupling means comprises a first and a second disc-shaped coupler body, each having a cylinder bore for receiving in each case a coupler space defining a coupler piston.
  • the proposed design of the coupling device with two separate coupler bodies is easy to implement and thus inexpensive to produce.
  • the area ratio of the formed on the coupler piston hydraulically effective surfaces for the realization of an optimum path ratio between the stroke of the actuator and the stroke of the nozzle needle is largely arbitrary.
  • the diameter of the respective cylinder bore can be used be in which the respective coupler piston is received.
  • the diameter of the cylinder bore is also freely selectable.
  • the coupling device By means of the coupling device, with a corresponding arrangement of the coupler pistons in the coupler bodies, a reversal of motion can also be realized, so that the nozzle needle stroke takes place in the opposite direction to the stroke of the actuator.
  • the piezoelectric actuator is arranged in a low-pressure space.
  • the piezoelectric actuator can be configured as a "wet" or “dry” actuator, wherein in the latter case, the actuator has a corresponding seal, for example consisting of a metal sleeve with a membrane.
  • the first and the second disc-shaped coupler body are arranged in the axial direction one behind the other lying between the nozzle body and the injector body.
  • the two disk-shaped coupler body thus form housing parts which separate the low-pressure region from the high-pressure region. Furthermore, a simple and easy-to-install coupler design is created, which is also compact in the axial direction.
  • the first disk-shaped coupler body axially delimits the high-pressure bore formed in the nozzle body.
  • the second disc-shaped coupler body axially delimits the low-pressure space formed in the injector body.
  • a connecting piston for the mechanical connection of the nozzle needle with the first coupler piston received in the first disk-shaped coupler body is on the nozzle needle educated.
  • the connecting piston is guided by a guide bore formed in the coupler body.
  • the connecting piston thus extends the nozzle needle into the low-pressure region.
  • the mechanical connection of the connecting piston with the coupler piston can be done for example by welding and / or by a press fit.
  • the connecting piston is guided through the guide bore and through the first coupler space at least up to the first coupler piston. This has the consequence that a pressure surface formed on the first coupler piston and delimiting the first coupler space is reduced by the cross-sectional area of the connecting piston.
  • the connecting piston in the region of the high-pressure bore can be surrounded by a sleeve which bears sealingly against the first disk-shaped coupler body.
  • the first coupler body can also be provided with a cylindrical projection for guiding the connecting piston and for sealing the guide bore with respect to the high-pressure bore.
  • the guide bore has a low-pressure region, for example in the form of an annular groove, which communicates via a bore with the low-pressure chamber.
  • the coupler spaces are hydraulically connected via bores in the disc-shaped coupler bodies.
  • the volume of a coupler space changes due to the stroke of a coupler piston received therein, fuel is displaced via the connection bores from one coupler space into the other coupler space.
  • a throttle is preferably formed in one of the bores connecting the two coupler spaces. The throttle causes a damping of the needle speed and a reduction of the map slope.
  • the high-pressure bore formed in the nozzle body has a guide region for guiding the nozzle needle.
  • the regions of the high-pressure bore adjacent to the guide region are preferably hydraulically connected via a throttle.
  • closing forces are also generated by the coupling device.
  • the low-pressure chamber is connected via a check valve with a return to realize a pressure increase in the low pressure chamber.
  • a pressure increase to, for example, 150 bar is already considered sufficient.
  • the nozzle needle and the first coupler piston accommodated in the first disk-shaped coupler body are mechanically coupled via a connecting piston which is guided as part of the first coupler piston through a guide bore formed in the coupler body ,
  • the connecting piston need not necessarily be part of the nozzle needle, but may also be part of the first coupler piston when it is guided through the guide bore during assembly of the injector.
  • the connecting piston be integral with the first coupler piston or be connected to this in such a way that in a first assembly step the integrally executed or built unit of first coupler piston and connecting piston is inserted into the guide bore of the coupler body and then in a second assembly step of the connecting piston with the nozzle needle is connected.
  • This has the advantage that the mechanical connection point is shifted from the low-pressure region into the high-pressure region. Fitting problems in the piston guides, which are caused for example by deformations during welding or compression, are thus avoided or shifted to a less sensitive area.
  • the connecting piston with the nozzle needle and / or the first coupler piston force, material and / or positively connected can be made by means of welding or pressing.
  • a screw connection can also be provided.
  • at least one end portion of the connecting piston is provided with an external thread and inserted into a bore with an internal thread, which is formed in the first coupler piston and / or in the nozzle needle.
  • the connecting piston can also be connected indirectly via a connecting piece with the nozzle needle.
  • the connector preferably has the same outer diameter as the nozzle needle and is axially attached to the nozzle needle.
  • the connection can be made for example by welding.
  • a bore in particular a blind hole, may be formed in the connecting piece, in which an end portion of the connecting piston is inserted.
  • the compound may be a press connection.
  • a screw or a welded connection can be executed.
  • the invention further provides a method for producing and / or assembling a nozzle needle assembly for a fuel injector, which comprises a nozzle needle, a coupler piston and a connecting piston, wherein the connecting piston has a smaller outer diameter than the coupler piston and / or the nozzle needle and part of the is one or more parts constructed coupler piston.
  • the connecting piston is guided through a guide bore of a coupler body and then directly or indirectly connected to the Düsennadelkraft-, material and / or positive fit.
  • the method leads to a nozzle needle assembly which can be used particularly advantageously in a fuel injector according to the invention.
  • the nozzle needle assembly can also be used in modified designs and therefore not limited to use in an injector according to the invention.
  • the connecting piston with the nozzle needle and / or a connecting piece for the indirect connection of the connecting piston with the nozzle needle which is welded, soldered, pressed, screwed and / or glued.
  • connection of the connecting piston to the nozzle needle takes place indirectly via a connecting piece
  • the connecting piece and the nozzle needle are furthermore preferably butted and welded together.
  • the fuel injector shown in longitudinal section of the FIG. 1 has a nozzle body 1 for receiving a nozzle needle 4 and an injector 2 for receiving a piezoelectric actuator 7 for actuating the nozzle needle 4.
  • the nozzle needle 4 is received in a liftable manner in a high-pressure bore 3 of the nozzle body 1, so that at least one injection opening 5 formed in the nozzle body 1 can be released or closed via the nozzle needle stroke. If the nozzle needle 4 is in its open position, fuel under high pressure is injected via the at least one injection opening 5 into the combustion chamber of the internal combustion engine.
  • the fuel is supplied to the fuel injector from a high-pressure accumulator 34, in the present case a common storage line (common rail).
  • an inlet channel 35 is formed in the injector body 2, via which the fuel passes into the high-pressure bore 3 and thus to the at least one injection opening 5.
  • the piezoelectric actuator 7 is connected via electrical connections 36 to an electrical voltage source (not shown). In the case of an electrically charged piezoactuator 7, this undergoes a length extension which represents the actuator stroke and which is converted into a stroke movement of the nozzle needle 4 on account of a coupling device 8.
  • the present coupling device 8 is designed in such a way that a length extension of the piezoactuator 7 causes a movement of the nozzle needle 4 which is opposite to the direction of movement of the piezoactuator 7. This means that the piezoactuator 7 is electrically charged during the opening stroke of the nozzle needle 4, while it is discharged between two injection processes or in the closed position of the nozzle needle 4. As a result, the stress on the piezoelectric actuator 7 is reduced.
  • the piezoelectric actuator 7 On the life of the piezoelectric actuator 7 also has a favorable effect that this is included in a low-pressure chamber 6 of the injector body 2. The piezoelectric actuator 7 is therefore not subjected to high pressure.
  • the already mentioned coupling device 8 has two disc-shaped coupler bodies 9, 10, which are arranged one behind the other in the axial direction between the injector body 2 and the nozzle body 1.
  • the two disc-shaped coupler bodies 9, 10 thus separate a low-pressure region assigned to the injector body 2 from a high-pressure region assigned to the nozzle body 1.
  • the disk-shaped coupler body 9 resting against the nozzle body 1 seals the high-pressure bore 3 and the fitting on the injector body 2 disk-shaped coupler body 10 from the low-pressure chamber 6.
  • the coupling device 8 can thus be completely displaced into the low-pressure region.
  • each coupler piston 15, 16 within the respective cylinder bore 11, 12 a coupler space 13, 14 axially limited.
  • the coupler piston surfaces delimiting the respective coupler space 13, 14 form pressure surfaces whose area ratio determines the transmission ratio between the actuator stroke and the nozzle needle stroke.
  • a significantly larger pressure surface for limiting the second coupler space 14 is formed on the second coupler piston 16 which is assigned to the piezoactuator 7 than on the first coupler piston 15, which is connected to the nozzle needle 4 via a connecting piston 17.
  • the connecting piston 17 is guided through a guide bore 18 in the first disc-shaped coupler body 9 and through the first coupler space 13, so that the pressure surface 19 delimiting the coupler space 13 on the first coupler piston 15 is reduced by the cross-sectional area of the connecting piston 17. Because the first coupler space 13 is arranged between the nozzle needle 4 and the first coupler piston 15, an increase in pressure in the first coupler space 13 causes the first coupler piston 15 and thus the nozzle needle 4 to be lifted. An increase in pressure in the first coupler space 13 takes place when, due to the length expansion of the piezoelectric actuator 7, the second coupler piston 16 dips deeper into the second coupler space 14 and thereby displaces fuel.
  • Through holes 23, 24 and a throttle 25 formed therein then passes the displaced from the second coupler chamber 14 fuel in the first coupler 13. Due to the selected area ratio, ie the size of each of a coupler piston 15, 16 formed hydraulically active surface, by a relatively small Aktorhub a significantly larger Düsennadelhub for opening the at least one injection port 5 can be effected.
  • the throttle 25 formed in the bore 23 or 24 causes a damping of the needle speed, so that the hydraulic design is further improved.
  • the connecting piston 17 is surrounded by a sleeve 20 in the region of the high-pressure bore 3.
  • the sleeve 20 is further supported on the first disk-shaped coupler body 9.
  • the sleeve 20 on the front side designed as a biting edge support surface.
  • the sleeve 20 is held in contact with the disc-shaped coupler body 9. The closing spring 31 also ensures that the nozzle needle 4 assumes its closed position when the piezoelectric actuator 7 is unloaded.
  • a biasing spring 32 is also arranged, by means of which the piezoelectric actuator 7 is biased relative to the injector housing 2.
  • the illustrated fuel injector has a guide region 27 formed in the high-pressure bore 3 for guiding the nozzle needle 4.
  • the adjacent to the guide portion 27 areas of the high-pressure bore 3 are hydraulically connected via a throttle 28.
  • the throttle 28 has a damping effect on the movement of the nozzle needle 4.
  • the nozzle needle 4 also has an enlarged diameter, so that radially extending shoulders 26 are formed, which form a pressure stage.
  • a needle stop 33 is provided for limiting the nozzle needle stroke, in the present case on the end face facing the nozzle needle 4 the sleeve 20 is formed.
  • the needle stop 33 can also be arranged in the low pressure area.
  • FIG. 2 illustrated embodiment of a fuel injector according to the invention differs from that of FIG. 1 essentially in that the connecting piston 17, by means of which the nozzle needle 4 and the first coupler piston 15 are mechanically coupled, is part of the first coupler piston 15.
  • the connecting piston 17 and the first coupler piston 15 are inserted into the guide bore 18 as a built unit. That is, the connecting piston 17 is first connected to the coupler piston 15, in the present case welded, and then passed through the guide bore 18. On the passed-through end of the connecting piston 17, the sleeve 20 is then placed, which seals the high-pressure region relative to the low pressure region. Only then is the nozzle needle 4 placed with the connecting piece 37 and welded to the connecting piston.
  • the connecting piece 37 forms a unit with the nozzle needle 4, wherein the connecting piece 37 and the nozzle needle 4 can also be made or built in one piece. In the present case, the connecting piece 37 is attached axially to the nozzle needle 4 and welded thereto.
  • FIG. 2 Not shown fuel injector of the FIG. 1 , so that reference is made in this connection to the above statements.
  • the FIG. 2 illustrated alternative embodiment is intended to facilitate the mounting of the fuel injector according to the invention and thus reduce the manufacturing cost.
  • the risk of fit inaccuracies in the guide areas is reduced, since the mechanical connection point is shifted from the low pressure area in the high pressure area. Any deformations of the connecting piston 17 caused by welding or pressing are of secondary importance in the area of the high-pressure bore 3, so that the arrangement of the mechanical connection point in this area proves to be advantageous.

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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 (12)

  1. Injecteur de carburant pour un système d'injection de carburant, en particulier un système d'injection à rampe commune, comprenant un corps de buse (1) et un corps d'injecteur (2), un alésage haute pression (3) étant réalisé dans le corps de buse (1) pour recevoir un pointeau de buse (4) à course de déplacement, dont la course de déplacement permet de libérer ou de fermer au moins une ouverture d'injection (5), et un espace basse pression (6) étant réalisé dans le corps d'injecteur (2) pour recevoir un actionneur piézoélectrique (7), lequel espace basse pression est accouplé ou peut être accouplé hydrauliquement par le biais d'un dispositif d'accouplement (8) au pointeau de buse (4) de telle sorte que le pointeau de buse (4) adopte sa position de fermeture lorsque l'actionneur piézoélectrique (7) est déchargé électriquement, caractérisé en ce que le dispositif d'accouplement (8) comprend un premier et un deuxième corps d'accouplement en forme de disque (9, 10) ayant chacun un alésage cylindrique (11, 12) pour recevoir à chaque fois un piston d'accouplement (15, 16) limitant un espace d'accouplement (13, 14), et un piston de liaison (17) est réalisé au niveau du pointeau de buse (4) pour la liaison mécanique du pointeau de buse (4) au premier piston d'accouplement (15) reçu dans le premier corps d'accouplement en forme de disque (9), le piston de liaison (17) étant guidé à travers un alésage de guidage (18) réalisé dans le corps d'accouplement (9).
  2. Injecteur de carburant selon la revendication 1, caractérisé en ce que le premier et le deuxième corps d'accouplement en forme de disque (9, 10) sont disposés l'un derrière l'autre dans la direction axiale entre le corps de buse (1) et le corps d'injecteur (2).
  3. Injecteur de carburant selon la revendication 1 ou 2, caractérisé en ce que le premier corps d'accouplement en forme de disque (9) limite axialement l'alésage haute pression (3) et/ou le deuxième corps d'accouplement en forme de disque (10) limite axialement l'espace basse pression (6).
  4. Injecteur de carburant selon la revendication 1, caractérisé en ce que le piston de liaison (17) est rapproché à travers le premier espace d'accouplement (13) au moins jusqu'au premier piston d'accouplement (15), de telle sorte qu'une surface de pression (19) réalisée au niveau du premier piston d'accouplement (15) et limitant le premier espace d'accouplement (13) soit réduite de la surface en section transversale du piston de liaison (17).
  5. Injecteur de carburant selon la revendication 1 ou 4, caractérisé en ce que le piston de liaison (17), dans la région de l'alésage haute pression (3), est entouré par une douille (20) s'appliquant hermétiquement contre le premier corps d'accouplement (9) en forme de disque.
  6. Injecteur de carburant selon l'une quelconque des revendications 1, 4 ou 5, caractérisé en ce que l'alésage de guidage (18) présente une région basse pression, par exemple sous la forme d'une rainure annulaire (21), laquelle est en liaison par le biais d'un alésage (22) avec l'espace basse pression (6).
  7. Injecteur de carburant selon l'une quelconque des revendications précédentes, caractérisé en ce que les espaces d'accouplement (13, 14) sont connectés hydrauliquement par le biais d'alésages (23, 24) réalisés dans les corps d'accouplement en forme de disque (9, 10), un étranglement (25) étant de préférence réalisé dans un alésage (23, 24).
  8. Injecteur de carburant selon l'une quelconque des revendications précédentes, caractérisé en ce que l'alésage haute pression (3) présente une région de guidage (27) pour guider le pointeau de buse (4), les régions de l'alésage haute pression adjacentes à la région de guidage (27) étant connectées hydrauliquement par le biais d'un étranglement (28).
  9. Injecteur de carburant selon l'une quelconque des revendications précédentes, caractérisé en ce que l'espace basse pression (6) est connecté par le biais d'un clapet antiretour (29) à un retour (30) afin de réaliser une augmentation de pression dans l'espace basse pression (6).
  10. Injecteur de carburant selon l'une quelconque des revendications 1 à 3 ou 5 à 9, caractérisé en ce que le pointeau de buse (4) et le premier piston d'accouplement (15) reçu dans le premier corps d'accouplement en forme de disque (9) sont accouplés mécaniquement par le biais d'un piston de liaison (17) qui est guidé en tant que constituant du premier piston d'accouplement (15) à travers un alésage de guidage (18) réalisé dans le corps d'accouplement (9).
  11. Injecteur de carburant selon la revendication 10, caractérisé en ce que le piston de liaison (17) est en liaison par force, par liaison de matière et/ou par engagement par correspondance de formes avec le pointeau de buse (4) et/ou le premier piston d'accouplement (15).
  12. Injecteur de carburant selon la revendication 10 ou 11, caractérisé en ce que le piston de liaison (17) est connecté au pointeau de buse (4) de manière indirecte par le biais d'une pièce de liaison (37).
EP11703208.6A 2010-02-24 2011-02-08 Injecteur de carburant avec un ensemble aiguille d'injecteur Not-in-force EP2539575B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010002286 2010-02-24
DE102010040581A DE102010040581A1 (de) 2010-02-24 2010-09-10 Kraftstoffinjektor sowie Verfahren zur Herstellung und/oder Montage einer Düsennadel-Baugruppe
PCT/EP2011/051778 WO2011104110A1 (fr) 2010-02-24 2011-02-08 Injecteur de carburant et procédé de production et/ou de montage d'un ensemble aiguille d'injecteur

Publications (2)

Publication Number Publication Date
EP2539575A1 EP2539575A1 (fr) 2013-01-02
EP2539575B1 true EP2539575B1 (fr) 2015-08-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11703208.6A Not-in-force EP2539575B1 (fr) 2010-02-24 2011-02-08 Injecteur de carburant avec un ensemble aiguille d'injecteur

Country Status (6)

Country Link
US (1) US9494116B2 (fr)
EP (1) EP2539575B1 (fr)
CN (1) CN102782302B (fr)
DE (1) DE102010040581A1 (fr)
IN (1) IN2012DN04948A (fr)
WO (1) WO2011104110A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102012219867A1 (de) * 2012-10-30 2014-04-30 Robert Bosch Gmbh Kraftstoffinjektor mit Piezoaktor
US11220980B2 (en) * 2019-05-16 2022-01-11 Caterpillar Inc. Fuel system having isolation valves between fuel injectors and common drain conduit

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DE10326045A1 (de) * 2003-06-10 2004-12-30 Robert Bosch Gmbh Einspritzdüse für Brennkraftmaschinen
DE10333573B3 (de) 2003-07-24 2004-11-18 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung
EP1991773B1 (fr) 2006-03-03 2013-05-15 Ganser-Hydromag AG Soupape d'injection de carburant pour moteurs a combustion interne
DE102006022802A1 (de) 2006-05-16 2007-11-22 Robert Bosch Gmbh Kraftstoffinjektor
JP2008151049A (ja) 2006-12-19 2008-07-03 Nippon Soken Inc 燃料噴射弁
DE102007002759A1 (de) 2007-01-18 2008-07-24 Robert Bosch Gmbh Kraftstoffinjektor mit direkter Düsennadelsteuerung
JP5079650B2 (ja) * 2007-11-02 2012-11-21 株式会社デンソー 燃料噴射弁及び燃料噴射装置
JP4780127B2 (ja) 2008-03-12 2011-09-28 株式会社デンソー 燃料噴射装置
JP4614189B2 (ja) 2008-05-12 2011-01-19 株式会社デンソー 燃料噴射装置
DE102008002417A1 (de) 2008-06-13 2009-12-17 Robert Bosch Gmbh Kraftstoffinjektor
DE102009002554A1 (de) 2008-07-23 2010-01-28 Robert Bosch Gmbh Kraftstoffinjektor für ein Kraftstoffeinspritzsystem

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DE102010040581A1 (de) 2011-08-25
US9494116B2 (en) 2016-11-15
WO2011104110A1 (fr) 2011-09-01
CN102782302A (zh) 2012-11-14
IN2012DN04948A (fr) 2015-09-25
EP2539575A1 (fr) 2013-01-02
CN102782302B (zh) 2015-02-25
US20120305675A1 (en) 2012-12-06

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