EP2955366B1 - Ensemble de buses pour un injecteur de carburant et injecteur de carburant - Google Patents

Ensemble de buses pour un injecteur de carburant et injecteur de carburant Download PDF

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Publication number
EP2955366B1
EP2955366B1 EP15163536.4A EP15163536A EP2955366B1 EP 2955366 B1 EP2955366 B1 EP 2955366B1 EP 15163536 A EP15163536 A EP 15163536A EP 2955366 B1 EP2955366 B1 EP 2955366B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
spring
spring plate
coupler
nozzle 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.)
Not-in-force
Application number
EP15163536.4A
Other languages
German (de)
English (en)
Other versions
EP2955366A1 (fr
Inventor
Andreas Gruenberger
Andreas Ohm
Andreas Koeninger
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2955366A1 publication Critical patent/EP2955366A1/fr
Application granted granted Critical
Publication of EP2955366B1 publication Critical patent/EP2955366B1/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
    • 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
    • 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
    • F02M61/161—Means for adjusting injection-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
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0075—Stop members in valves, e.g. plates or disks limiting the movement of armature, valve or spring
    • 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
    • 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

Definitions

  • the invention relates to a nozzle assembly for a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine with the features of the preamble of claim 1. Furthermore, the invention relates to a fuel injector with such a nozzle assembly.
  • a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine which has an axially displaceably guided in a high-pressure bore of a nozzle body nozzle needle, which is directly actuated by means of an actuator, such as a piezoelectric actuator.
  • the actuator cooperates with a hydraulic coupler, which comprises a coupler piston accommodated in a coupler sleeve for delimiting a coupler space.
  • the coupler chamber is connected to a control chamber, which is delimited in the axial direction by the nozzle needle. Accordingly, the pressure prevailing in the control chamber is at the nozzle needle, which pressure can be controlled via the actuator.
  • JP H11 324866 A discloses another fuel injector in which a plurality of springs and spring plates surround a nozzle needle to exert different forces on the nozzle needle depending on the stroke of the nozzle needle.
  • the stroke of the nozzle needle is usually preset and is limited on the one hand by the nozzle needle seat, on the other hand by a stroke stop.
  • the default hub may be subject to change. This is especially true when connecting body parts an injector, a nozzle retaining nut is used. Because in the area of screwing the nozzle retaining nut with a body component forces are introduced into the body, which have an influence on the stroke of the nozzle needle. The influence increases with increasing distance of the stroke stop to the seat of the nozzle needle.
  • the present invention is therefore an object of the invention to provide a nozzle assembly for a fuel injector with a hubbeweglichen nozzle needle whose stroke is limited by a "seat close" stroke stop. This is intended to reduce the risk of changing a nozzle needle stroke preset in production. Furthermore, the stroke stop should be easy and inexpensive to implement.
  • the nozzle assembly proposed for a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine comprises a nozzle body and a nozzle needle which is liftably received for releasing and closing at least one injection opening in a high-pressure bore of the nozzle body and acted upon in the direction of a sealing seat by the spring force of a nozzle spring.
  • the nozzle spring is supported at its end facing the nozzle seat on a spring plate coupled to the nozzle needle.
  • According to the nozzle spring is supported at its other end to a second spring plate, which is arranged at an axial distance from the first spring plate and cooperating with this form a stroke stop for the nozzle needle.
  • First and second spring plate form in this way a seat-near stroke stop for limiting the stroke of the nozzle needle.
  • the axial distance between the two spring plates defines the maximum opening stroke of the nozzle needle.
  • the stroke stopper is simple and inexpensive to implement by providing a second spring plate.
  • the nozzle needle is surrounded at its end facing away from the sealing seat by a third spring plate, which is acted upon by the spring force of another spring in the direction of a lifting coupler piston of a hydraulic coupling device, so that the spring force of the other spring holds the third spring plate in contact with the coupler piston.
  • an actuator of the injector for controlling the nozzle needle stroke can be coupled to the nozzle needle in such a way that a translation of the actuator force or stroke and / or a reversal of the effective direction of the actuator takes place.
  • the second spring plate is acted upon by the spring force of a further spring whose spring force is greater than that of the nozzle spring and axially biases the second spring plate against the spring force of the nozzle spring against a preferably radially extending support surface.
  • the spring force of the other spring ensures the constant contact of the second spring plate with the support surface. This means that it counteracts an unwanted lifting of the second spring plate from the support surface.
  • a preset stroke of the nozzle needle is maintained.
  • the support surface is formed on the nozzle body, which may have, for example, a radially extending paragraph for this purpose.
  • the nozzle body is designed in several parts and comprises a nozzle part and a thereto attached pipe part.
  • the multi-part design of the nozzle body has the advantage that the stresses in the nozzle body are reduced, which are inter alia due to the fact that at the high pressure bore limiting inner peripheral surface during operation of the injector is high pressure.
  • the axial force which is caused by a nozzle retaining nut for the axial clamping of the various body components of the injector, leads to stresses in the nozzle body.
  • the nozzle retaining nut can also be used to axially clamp the several parts of the nozzle body, so that a high-pressure-tight seal between the parts is ensured.
  • the tube part has an inner diameter that is larger than the inner diameter of the nozzle part.
  • an annular surface is exposed on the nozzle part of the nozzle body, which can be used as a radially extending support surface for supporting the second spring plate. This allows easy adjustment and measurement of the nozzle needle stroke.
  • the spring force of the second spring plate acts against the support surface axially biasing spring alone on the nozzle part of the nozzle body and the pipe part remains unloaded.
  • the second spring plate is disc-shaped. Such a component is simple and inexpensive to produce.
  • the second spring plate may have a central recess for the passage of the nozzle needle.
  • the inner diameter of the central recess of the second spring plate is preferably larger than the outer diameter of the nozzle needle in the region of the passage.
  • the remaining annular gap between the second spring plate and the Nozzle needle serves to supply fuel in the direction of the at least one injection opening.
  • At least one flow-through opening is formed in at least one of the two spring plates.
  • the flow-through opening may be formed, for example, in the second spring plate as an eccentrically arranged axially extending channel.
  • an axially extending channel may be formed, which optionally opens into a radially extending channel to circumvent a collar region of the nozzle needle for supporting the spring plate.
  • the first spring plate is preferably annular and has a hollow cylindrical projection for forming a stop surface.
  • the stop surface is further preferably formed over an end face of the hollow cylindrical projection. Due to the coupling of the first spring plate with the nozzle needle this is carried by the nozzle needle when it opens. In this case, an axial gap between the stop surface and the second spring plate defines the maximum opening stroke of the nozzle needle.
  • the nozzle spring is disposed within the hollow cylindrical projection of the first spring plate, so that this causes a guide of the nozzle spring.
  • the nozzle needle, the third spring plate and the coupler piston define a control chamber which is hydraulically connected to a coupler volume of the coupling device. Due to the hydraulic connection can be influenced by a change in pressure in the coupler volume of the pressure in the control chamber in such a way that the pressure decreases and the nozzle needle is able to open against the spring force of the nozzle spring.
  • the required pressure change in the coupler volume is effected by a stroke of the coupler piston, which is for this purpose coupled to the actuator.
  • the coupler volume is preferably formed in a coupler body of the hydraulic coupling device, which is further preferably axially clamped to the nozzle body by means of the aforementioned nozzle retaining nut. The coupler body is thus fixed in its position.
  • the coupler piston for limiting the coupler volume in the coupler body is guided in a liftable manner.
  • the coupler body preferably has a hollow-cylindrical projection which surrounds the coupler piston at least in regions.
  • the coupler body can be penetrated by a pressure pin which transmits the actuator force or the actuator stroke to the coupler piston. The force or stroke transmission via the pressure pin allows the arrangement of the actuator in a low-pressure region of the injector, which is separated from the high pressure region by the coupler body.
  • a fuel injector for injecting fuel into the combustion chamber of an internal combustion engine having a nozzle assembly according to the invention and an actuator assembly which is hydraulically and / or mechanically coupled or coupled to the nozzle needle for actuating the nozzle needle.
  • the actuator assembly comprises a piezoelectric actuator or a magnetic actuator.
  • the use of a piezoelectric actuator or a magnetic actuator allows direct actuation of the nozzle needle.
  • the actuator assembly is preferably accommodated in a body component of the injector, which is axially braced via the already mentioned nozzle retaining nut with the nozzle body and / or the coupler body.
  • the Indian Fig. 1 in longitudinal section shown fuel injector comprises a two-part nozzle body 1 with a nozzle part 1.1 as a first part and a pipe part 1.2 as a second part.
  • the parts 1.1 and 1.2 of the nozzle body 1 are axially braced with a coupler body 21 of a hydraulic coupling device 18 and a further body member 23 via a nozzle lock nut 24.
  • About the screwing of the nozzle retaining nut 24 forces are introduced into the injector, which may be relevant to function. For such forces can lead to a change in a preset stroke h of a nozzle needle 2, which is received in a liftable manner in a high-pressure bore 4 of the nozzle body 1 for releasing and closing at least one injection opening 3.
  • the magnitude of the influence of the forces depends in particular on the distance of a stop surface A for limiting the nozzle needle stroke from a sealing seat 5 of the nozzle needle 2. To reduce the influence, the distance should be as small as possible.
  • the stop surface A is presently formed on a hollow cylindrical projection 15 of a first spring plate 7, which rests on a collar 25 of the nozzle needle 2 and is held by the spring force of a nozzle spring 6 in contact with the annular collar 25.
  • the nozzle spring 6 presses the nozzle needle 2 in the sealing seat 5. It is supported At an axial distance from the first spring plate 7, a second spring plate 8 is arranged, which cooperates with the first spring plate 7 forming a stroke stop 9. The axial distance defines the stroke h of the nozzle needle 2.
  • the spring force is greater than that of the nozzle spring 6 and the second spring plate 8 against a support surface 10 on the nozzle body. 1 suppressed.
  • the support surface 10 is formed on an end face of the nozzle part 1.1 of the nozzle body 1, on which also the pipe part 1.2 of the nozzle body 1 rests.
  • the other spring 11 is supported at the other end on a third spring plate 16, which surrounds the control-chamber-side end of the nozzle needle 2 and together with the nozzle needle 2 and a coupler body 21 hubbeweglich guided coupler piston 17 limits the control chamber 19.
  • the spring force of the further spring 11 holds the third spring plate 16 in abutment with the coupler piston 17.
  • the coupler piston 17 further defines a coupler body 21 formed in the coupler volume 20, whose function will be described below.
  • the arrangement of the two spring plates 7, 8 in the high-pressure bore 4, ie in a region close to the seat, has the consequence that the axial distance between the stop surface A and the sealing seat 5 - in comparison to the prior art - is low. This ensures that the influence of the screwing of the clamping nut on the preset stroke of the nozzle needle 2 and thus on the function of the injector is minimal. Furthermore, both spring plates 7, 8 simple geometries, so that they are inexpensive to produce.
  • the second spring plate 8 is present disc-shaped with a central recess 12 through which the nozzle needle 2 is guided.
  • the recess 12 has an inner diameter which is greater than the outer diameter of the nozzle needle 2 in this area, so that is able to flow through the remaining annular gap of the fuel to be injected through.
  • at least one flow opening 13 may be provided in the form of an axial bore.
  • a piezoelectric actuator of an actuator assembly 22 is activated, which is received in the body member 23.
  • the piezoelectric actuator expands and pushes - against the spring force of a spring 27 - a piston 26 down.
  • the piston 26 is operatively connected via a pressure pin 28 with the coupler piston 17, so that this is moved downward.
  • the result of the movement of the coupler piston 17 is that the coupler volume 20 formed in the coupler body 21 increases, so that a pressure drop in the coupler volume 20 is effected. Since the coupler volume 20 is connected via a connecting channel 29 with the control chamber 19, and the pressure in the control chamber 19 drops.
  • the piezoelectric actuator of the actuator assembly 22 is deactivated. This has the consequence that the piezoelectric actuator contracts again.
  • the spring force of the spring 27 presses the piston 26 upwards.
  • the provision of the coupler piston 17 is effected by the spring force of the spring 11. With the provision of the coupler piston 17, the coupler volume 20 decreases again and the pressure in the coupler volume 20 and in the control chamber 19 increases.
  • On the nozzle needle 2 now acts - in addition to the spring force of the nozzle spring 6 - a hydraulic closing force, which presses the nozzle needle 2 in the sealing seat 5, so that the injection is terminated.
  • the Indian Fig. 2 illustrated fuel injector differs from that of Fig. 1 only slightly. It has flow openings 13, 14 in the first spring plate 7, which replace the flow opening 13 in the second spring plate 8.
  • the flow-through opening 13 is designed as a longitudinal groove in an inner circumferential region of the first spring plate 7, into which a radially extending channel serving as a flow-through opening 14 opens.
  • the flow-through opening 14 ensures that the injected Fuel on annular collar 25 of the nozzle needle 2 passes into the lower part of the high-pressure bore 4 passes.
  • the functioning of the injector of Fig. 2 the same applies to the Fig. 1 ,
  • the figures represent only preferred embodiments of the invention. Modifications are possible. In particular, may be provided instead of a piezoelectric actuator, a magnetic actuator for controlling the lifting movement of the nozzle needle.
  • the coupler may be a mechanical coupler.
  • the arrangement of a coupler can be dispensed with in its entirety. The presently selected embodiment is merely illustrative of a fuel injector having a nozzle assembly according to the present invention.

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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 (9)

  1. Module de buse pour un injecteur de carburant pour l'injection de carburant dans une chambre de combustion d'un moteur à combustion interne, comprenant un corps de buse (1) et un pointeau de buse (2) qui est reçu avec un mouvement alternatif dans un alésage haute pression (4) du corps de buse (1) pour ouvrir et fermer au moins une ouverture d'injection (3), et qui est sollicité par la force de ressort d'un ressort de buse (6) dans la direction d'un siège d'étanchéité (5), le ressort de buse (6) étant supporté au niveau de son extrémité tournée vers le siège de buse (5) contre une coupelle de ressort (7) accouplée au pointeau de buse (2), le ressort de buse (6) étant supporté au niveau de son autre extrémité contre une deuxième coupelle de ressort (8) qui est disposée à une distance axiale de la première coupelle de ressort (7) et qui coopère avec celle-ci en formant une butée de fin de course (9) pour le pointeau de buse (2), caractérisé en ce que le pointeau de buse (2), au niveau de son extrémité opposée au siège d'étanchéité, est entouré par une troisième coupelle de ressort (16) qui est sollicitée par la force de ressort d'un ressort supplémentaire (11) dans la direction d'un piston d'accouplement (17) d'un dispositif d'accouplement hydraulique (18), déplaçable avec un mouvement alternatif, de telle sorte que la force de ressort du ressort supplémentaire (11) retienne la troisième coupelle de ressort (16) en appui contre le piston d'accouplement (17).
  2. Module de buse selon la revendication 1, caractérisé en ce que la deuxième coupelle de ressort (8) est sollicitée par la force de ressort du ressort supplémentaire (11), dont la force de ressort est supérieure à celle du ressort de buse (6) et précontraint axialement la deuxième coupelle de ressort (8) à l'encontre de la force de ressort du ressort de buse (6) contre une surface de support (10) s'étendant de préférence radialement, la surface de support s'étendant radialement (10) étant en outre de préférence réalisée au niveau du corps de buse (1).
  3. Module de buse selon la revendication 1 ou 2, caractérisé en ce que le corps de buse (1) est réalisé en plusieurs parties et comprend une partie de buse (1.1) ainsi qu'une partie tubulaire (1.2) appliquée contre celle-ci, la partie tubulaire (1.2) possédant de préférence un diamètre intérieur qui, pour réaliser la surface de support s'étendant radialement (10), est supérieur au diamètre intérieur de la partie de buse (1.1).
  4. Module de buse selon l'une quelconque des revendications précédentes, caractérisé en ce que la deuxième coupelle de ressort (8) est réalisée en forme de disque et/ou possède un évidement central (12) pour le passage du pointeau de buse (2), dont le diamètre intérieur est de préférence supérieur au diamètre extérieur du pointeau de buse (2) dans cette région.
  5. Module de buse selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins dans l'une des deux coupelles de ressort (7, 8) est réalisée au moins une ouverture de passage d'écoulement (13, 14).
  6. Module de buse selon l'une quelconque des revendications précédentes, caractérisé en ce que la première coupelle de ressort (7) est réalisée sous forme annulaire et possède une pièce rapportée de forme cylindrique creuse (15) pour réaliser une surface de butée (A), le ressort de buse (6) étant de préférence disposé à l'intérieur de la pièce rapportée de forme cylindrique creuse (15).
  7. Module de buse selon la revendication 1, caractérisé en ce que le pointeau de buse (2), la troisième coupelle de ressort (16) et le piston d'accouplement (17) délimitent un espace de commande (19) qui est relié hydrauliquement à un volume d'accouplement (20) du dispositif d'accouplement (18), le volume d'accouplement (20) étant réalisé de préférence dans un corps d'accouplement (21).
  8. Module de buse selon la revendication 7, caractérisé en ce que le piston d'accouplement (17), pour limiter le volume d'accouplement (20) dans le corps d'accouplement (21) étant guidé avec un mouvement alternatif.
  9. Injecteur de carburant pour l'injection de carburant dans une chambre de combustion d'un moteur à combustion interne comprenant un module de buse selon l'une quelconque des revendications précédentes et un module d'actionneur (22) qui est accouplé ou peut être accouplé au pointeau de buse (2) de manière hydraulique et/ou mécanique pour actionner le pointeau de buse (2), le module d'actionneur (22) comprenant de préférence un actionneur piézo-électrique ou un actionneur magnétique.
EP15163536.4A 2014-06-13 2015-04-14 Ensemble de buses pour un injecteur de carburant et injecteur de carburant Not-in-force EP2955366B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014211351.2A DE102014211351A1 (de) 2014-06-13 2014-06-13 Düsenbaugruppe für einen Kraftstoffinjektor sowie Kraftstoffinjektor

Publications (2)

Publication Number Publication Date
EP2955366A1 EP2955366A1 (fr) 2015-12-16
EP2955366B1 true EP2955366B1 (fr) 2018-03-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15163536.4A Not-in-force EP2955366B1 (fr) 2014-06-13 2015-04-14 Ensemble de buses pour un injecteur de carburant et injecteur de carburant

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EP (1) EP2955366B1 (fr)
DE (1) DE102014211351A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH329505A (de) * 1955-02-23 1958-04-30 Saurer Ag Adolph Verfahren zum Steuern des Durchflussquerschnittes von Einspritzdüsen für Brennkraftmaschinen und Einspritzdüse zur Durchführung des Verfahrens
JP3985338B2 (ja) * 1998-05-19 2007-10-03 株式会社デンソー 燃料噴射ノズル
DE19936668A1 (de) * 1999-08-04 2001-02-22 Bosch Gmbh Robert Common-Rail-Injektor
DE10122256A1 (de) * 2001-05-08 2002-11-21 Bosch Gmbh Robert Kraftstoff-Einspritzvorrichtung für Brennkraftmaschinen, insbesondere Common-Rail-Injektor, sowie Kraftstoffsystem und Brennkraftmaschine
DE102006021491A1 (de) 2006-05-09 2007-11-15 Robert Bosch Gmbh Kraftstoffinjektor mit direkt betätigbarer Düsennadel
JP2008151049A (ja) * 2006-12-19 2008-07-03 Nippon Soken Inc 燃料噴射弁
DE102012222043A1 (de) * 2012-12-03 2014-06-05 Robert Bosch Gmbh Kraftstoffinjektor
DE102014201850A1 (de) * 2014-02-03 2015-08-06 Robert Bosch Gmbh Düsenbaugruppe für einen Kraftstoffinjektor sowie Kraftstoffinjektor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2955366A1 (fr) 2015-12-16
DE102014211351A1 (de) 2015-12-17

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