WO2017080757A1 - Ensemble gicleur pour injecteur de carburant servant à l'injection d'un carburant gazeux et/ou liquide, et injecteur de carburant - Google Patents

Ensemble gicleur pour injecteur de carburant servant à l'injection d'un carburant gazeux et/ou liquide, et injecteur de carburant Download PDF

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Publication number
WO2017080757A1
WO2017080757A1 PCT/EP2016/074846 EP2016074846W WO2017080757A1 WO 2017080757 A1 WO2017080757 A1 WO 2017080757A1 EP 2016074846 W EP2016074846 W EP 2016074846W WO 2017080757 A1 WO2017080757 A1 WO 2017080757A1
Authority
WO
WIPO (PCT)
Prior art keywords
injection valve
valve member
nozzle assembly
assembly according
annular space
Prior art date
Application number
PCT/EP2016/074846
Other languages
German (de)
English (en)
Inventor
Jochen Wessner
Martin Katz
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 WO2017080757A1 publication Critical patent/WO2017080757A1/fr

Links

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
    • F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
    • F02M43/04—Injectors peculiar thereto
    • 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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02D19/0686—Injectors
    • F02D19/0694—Injectors operating with a plurality of fuels
    • 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
    • F02M2200/46—Valves, e.g. injectors, with concentric valve bodies
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • NOZZLE ASSEMBLY FOR A FUEL INJECTION VALVE FOR INJECTING A
  • the invention also relates to a fuel injector for injecting a gaseous and / or liquid fuel into a combustion chamber of an internal combustion engine having such a nozzle assembly.
  • the fuel injection valve may be designed as a mono-fuel injector or as a dual-fuel injector.
  • Fuel injection valves or injectors known from the prior art generally have inwardly opening injection valve members, which are acted upon in the closing direction by the spring force of a spring.
  • the spring force must be dimensioned sufficiently large to prevent unintentional opening of the injection valve member by the present in the combustion chamber compression pressure in the unpressurized state, especially in the starting case of the internal combustion engine.
  • the spring therefore regularly occupies a large space within the injector.
  • the present invention has for its object to provide a nozzle assembly for a fuel injection valve for injecting a gaseous and / or a liquid fuel, which is particularly compact.
  • the nozzle assembly is proposed with the features of claim 1. Advantageous developments of the invention can be found in the dependent claims. Further, a fuel injection valve is provided with such a nozzle assembly.
  • the nozzle assembly proposed for a fuel injector for injecting a gaseous and / or liquid fuel into a combustion chamber of an internal combustion engine comprises a nozzle body and an injection valve member.
  • the injection valve member is at least partially received in a liftable manner for releasing and closing at least one injection opening in the nozzle body, wherein an annular space is formed between the nozzle body and the injection valve member.
  • a stationary arranged and with respect to the injection valve member radially biased tumbler is received in the annular space, so that between the tumbler and the injection valve member a force and / or form fit can be realized.
  • an axially displaceable separating element is further accommodated in the annular space, which can be acted upon in the direction of the tumbler element with a fluid pressure.
  • the locking function is realized by the locking element, so that a spring loading the injection valve member in the closing direction is dispensable. This also eliminates the space for receiving the spring, so that the nozzle assembly according to the invention can be made very compact design.
  • the locking element is radially biased relative to the injection valve member. This means that the tumbler element bears radially on the outside of the injection valve member in order to keep it in its closed position. However, this is only the case when the system is depressurized, ie no fluid pressure acts on the separating element in the direction of the locking element.
  • the separating element is always pressurized during operation of the internal combustion engine, so that the opening of the injection valve member is ensured and the influence of the tumbler element is kept as low as possible to the stroke of the injection valve member.
  • the Zuhaltefunktion should therefore only prevent accidental opening of the injection valve member when starting the engine. If, after starting the internal combustion engine, a fluid pressure builds up in the annular space, this can be used for the axial displacement of the separating element in the direction of the locking element, so that the force and / or positive connection between the locking element and the injection valve member is canceled.
  • the locking element is designed as an elastically deformable spring arm, which is radially biased relative to the injection valve member.
  • the radial bias ensures the positive and / or positive locking of the locking element with the injection valve member in the pressureless state.
  • the elastic deformability of the spring arm ensures that the force and / or positive connection can be canceled by the separating element.
  • the injection valve member is uniformly loaded by the radially biased tumbler over the circumference, preferably more than elastically deformable spring arms formed Zuhalteieri are provided in the annular space of the nozzle assembly, which are further preferably arranged at the same angular distance from each other.
  • a single tumbler element which comprises at least one elastically deformable spring arm which is radially prestressed with respect to the injection valve member.
  • the locking element comprises a plurality of such spring arms, which are further preferably arranged at the same angular distance from one another in order to load the injection valve member evenly over the circumference.
  • the locking element is designed as a spring-loaded arm or comprises at least one spring-loaded arm, which is radially biased relative to the injection valve member.
  • the radial bias is effected in this case via a spring whose spring force acts on the arm in the direction of the injection valve member.
  • the spring arm of the spring-loaded arm is further preferably not formed elastically deformable, but hinged to a fixed part of the tumbler pivot.
  • the joint can be formed for example by a film hinge.
  • the injection valve member have at least one shoulder and / or at least one recess on the outer circumference side.
  • the paragraph and / or the recess allows or allow in a simple way the production of a positive connection between the tumbler element and the injection valve member.
  • the axial position of the shoulder or the recess is adapted to the axial position of the tumbler.
  • the recess may be formed as a groove, in particular as an annular groove.
  • the annular groove has the advantage that the desired positive locking is independent of the angular position of the injection valve member relative to the locking element produced. The same applies to the paragraph, which is therefore preferably designed as a ring-shaped paragraph.
  • the locking element is axially supported on the nozzle body.
  • the axial support can be done for example on an annular shoulder of the nozzle body.
  • at least one support tab or an annular support section can be formed on the tumbler element.
  • the axial support is intended to prevent an axial displacement of the locking element by the separating element.
  • the separating element is arranged on the side facing away from the combustion chamber of the locking element. The pressurization of the separating element then takes place automatically after the starting of the internal combustion engine by the fluid pressure building up in the annular space.
  • the separating element is axially displaced in the direction of the tumbler element and exerts an axial compressive force on the tumbler element, which counteracts the radial prestressing force, so that the force and / or positive locking of the tumbler element with the injection valve member is canceled.
  • the separating element is preferably designed as an axially displaceable sleeve. This ensures that the locking element - regardless of the angular position of the separating element - is evenly loaded and the force and / or positive connection with the injection valve member is safely repealed.
  • the sleeve is executed on the outside circumference stepped.
  • the surface acted upon by fluid pressure increases, so that greater pressure forces can be achieved.
  • the sleeve may also have a collar portion.
  • the pressurizable with fluid pressure larger area, in particular end face, is preferably arranged at the end of the separating element, which faces away from the locking element.
  • the stepped outer contour or the collar portion of the separating element also facilitates a subdivision of the annular space into different pressure chambers, since the thickness of the separating element in the radial direction can be selected such that a gap seal between the separating element and the nozzle body and between the separating element and the injection valve member is trained. This ensures that - at least during operation of the internal combustion engine - prevail on both sides of the separating element always different pressure conditions.
  • the pressure should be greater on the side facing away from the tumbler element than on the side facing the tumbler element, in order to reliably prevent force and / or positive locking of the tumbler element with the injection valve member.
  • the pressure difference can be, for example, 3 to 10 bar.
  • the separation of the annular space into different pressure chambers can also be effected by at least one sealing element which is connected to the separating element for this purpose.
  • the injection valve member is formed at least in sections as a hollow needle and in the hollow needle, a further injection valve member is received liftable. That is, the nozzle assembly includes two injection valve members, one inside the other, for controlling the injection of two different fuels.
  • the nozzle assembly is therefore particularly suitable for a dual-fuel injector. Due to the comparatively large areas on the outer injection valve member, the advantages of the invention are particularly effective here.
  • the holding of the internal injection valve member can, on the other hand, continue to be effected by means of a spring, since here the surfaces or forces are significantly smaller.
  • a fuel injection valve for injecting a gaseous and / or liquid fuel into a combustion chamber of an internal combustion engine with a nozzle assembly according to the invention.
  • the fuel injection valve may be designed as a mono-fuel injector or as a dual-fuel injector.
  • FIG. 1 shows a schematic longitudinal section through a nozzle assembly according to the invention according to a first preferred embodiment
  • FIG. 2 shows a schematic longitudinal section through a nozzle assembly according to the invention according to a second preferred embodiment
  • FIG. 3 shows a schematic longitudinal section through a nozzle assembly according to the invention according to a third preferred embodiment
  • 4 shows a schematic longitudinal section through a nozzle assembly according to the invention according to a fourth preferred embodiment
  • FIG. 5 is a perspective view of the separating element of the nozzle assembly of Fig. 4,
  • FIGS. 7 a) -c) are each a sectional view of a locking element for a nozzle assembly according to the invention.
  • FIG. 1 shows a nozzle assembly with a nozzle body 1 and an injection valve 2 received in a liftable manner. Between the nozzle body 1 and the injection valve member 2, an annular space 3 is formed, in which a locking element 4 and a separating element 5 are accommodated.
  • the locking element 4 is arranged stationarily in the annular space 3. In the axial direction, it is supported by a Stützla- see 15 on an annular shoulder 10 of the nozzle body 1 from. It also has an elastically deformable spring arm 6, which is radially biased relative to the injection valve member 2 and engages in a recess 9 formed as an annular groove of the injection valve member 2.
  • the separating element 5 in the present case has two sealing elements 12 which seal the seal Pressure chamber above the separator 5 with respect to the pressure chamber below the separator 5 effect.
  • the pressure difference also ensures that the separating function of the separating element 5 is maintained during normal operation.
  • the nozzle assembly shown in Fig. 1 is that of a dual-fuel injector.
  • the injection valve member 2 is formed as a hollow needle and has on the inside a further injection valve member 13.
  • a modified nozzle assembly for a mono-fuel injector eliminates the injection valve member 13 and the injection valve member 2 is preferably designed as a simple needle.
  • FIG. 1 A further preferred embodiment of a nozzle assembly according to the invention is shown in FIG. It differs from that of FIG. 1 by minor modifications in the region of the tumbler element 4 and the separating element 5.
  • the tumbler element 4 has a somewhat differently shaped spring arm 6.
  • the separating element 5 has a collar portion 11, which is adapted to the cross section of the annular space 3 in such a way that the sealing elements 12 can be omitted.
  • the subdivision of the annular space 3 into different pressure chambers is effected here solely by the separating element 5.
  • FIG. 3 A further preferred embodiment of a nozzle assembly according to the invention is shown in FIG. 3.
  • the separating element 5 is not shown, since the essential difference from the preceding embodiments is realized by the locking element 4.
  • This has no elastically deformable spring arm 6, but a spring-loaded arm 7.
  • the arm 7 is pressed by the spring force of a spring 14 against the injection valve member 2.
  • a circumferential shoulder 8 is formed on the injection valve member 2, which is engaged behind by the arm 7.
  • FIG. 4 is limited to the illustration of a separating element 5.
  • the collar section 11 is particularly large in order to achieve a particularly high pressure force P acting in the axial direction over the fluid pressure building up in the annular space 3. 5, the separating element 5 of FIG. 4 is shown in a perspective view.
  • FIG. 6 shows a perspective view of a locking element 4, which has a plurality of spring arms 6 and a plurality of support tabs 15 for support on the nozzle body 1.
  • Spring arms 6 and support tabs 15 are connected via an annular portion 18.
  • FIGS. 7a) -c Further possible embodiments of a locking element 4 are shown in FIGS. 7a) -c), each of which shows the cross-section of a locking element 4.
  • the locking element 4 of FIG. 7a) largely corresponds to that of FIG. 2, so that will not be discussed in detail.
  • the support on the nozzle body 1 is effected via a plurality of support tabs 15.
  • the retaining elements 4 shown in FIGS. 7b) and 7c) comprise, for support on the nozzle body 1, in each case an annular support section 16 which renders the formation of individual support tabs 15 superfluous.

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

Abstract

L'invention concerne un ensemble gicleur pour un injecteur de carburant servant à l'injection d'un carburant gazeux et/ou liquide dans une chambre de combustion d'un moteur à combustion interne, comprenant un corps de gicleur (1) et un élément injecteur (2) qui est au moins sur certaines parties logé dans le corps de gicleur (1) de manière à effectuer un mouvement alternatif en formant un espace annulaire (3) pour dégager et fermer au moins un orifice d'injection. Selon l'invention, un élément de verrouillage (4) fixe et précontraint radialement par rapport à l'élément injecteur (2) est logé dans l'espace annulaire (3), de sorte qu'une liaison à force et/ou par complémentarité de forme peut être réalisée entre l'élément de verrouillage (4) et l'élément injecteur (2). Un élément de séparation (5) déplaçable axialement est par ailleurs logé dans l'espace annulaire (3) et peut être soumis à l'action de la pression d'un fluide dans la direction de l'élément de verrouillage (4), pour supprimer la liaison à force et/ou par complémentarité de forme. L'invention concerne en outre un injecteur de carburant muni d'un ensemble gicleur de ce type.
PCT/EP2016/074846 2015-11-11 2016-10-17 Ensemble gicleur pour injecteur de carburant servant à l'injection d'un carburant gazeux et/ou liquide, et injecteur de carburant WO2017080757A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015222162.8A DE102015222162A1 (de) 2015-11-11 2015-11-11 Düsenbaugruppe für ein Brennstoffeinspritzventil zum Einspritzen eines gasförmigen und/oder flüssigen Brennstoffs, Brennstoffeinspritzventil
DE102015222162.8 2015-11-11

Publications (1)

Publication Number Publication Date
WO2017080757A1 true WO2017080757A1 (fr) 2017-05-18

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PCT/EP2016/074846 WO2017080757A1 (fr) 2015-11-11 2016-10-17 Ensemble gicleur pour injecteur de carburant servant à l'injection d'un carburant gazeux et/ou liquide, et injecteur de carburant

Country Status (2)

Country Link
DE (1) DE102015222162A1 (fr)
WO (1) WO2017080757A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019068321A1 (fr) * 2017-10-04 2019-04-11 Robert Bosch Gmbh Injecteur de carburant pour le dosage de deux combustibles
EP3208456B1 (fr) * 2016-02-16 2020-04-15 Delphi Technologies IP Limited Ensemble de buse et injecteur de carburant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5899389A (en) * 1997-06-02 1999-05-04 Cummins Engine Company, Inc. Two stage fuel injector nozzle assembly
WO2002073023A1 (fr) * 2001-03-12 2002-09-19 Robert Bosch Gmbh Injecteur
DE102005004405A1 (de) * 2005-01-31 2006-08-03 Siemens Ag Düsenbaugruppe und Einspritzventil
DE102007028091A1 (de) * 2007-06-20 2008-12-24 Daimler Ag Kraftstoffversorgungssystem
WO2015149039A2 (fr) * 2014-03-28 2015-10-01 Quantlogic Corporation Injecteur de carburant souple pour injection de carburant simple et double

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5899389A (en) * 1997-06-02 1999-05-04 Cummins Engine Company, Inc. Two stage fuel injector nozzle assembly
WO2002073023A1 (fr) * 2001-03-12 2002-09-19 Robert Bosch Gmbh Injecteur
DE102005004405A1 (de) * 2005-01-31 2006-08-03 Siemens Ag Düsenbaugruppe und Einspritzventil
DE102007028091A1 (de) * 2007-06-20 2008-12-24 Daimler Ag Kraftstoffversorgungssystem
WO2015149039A2 (fr) * 2014-03-28 2015-10-01 Quantlogic Corporation Injecteur de carburant souple pour injection de carburant simple et double

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3208456B1 (fr) * 2016-02-16 2020-04-15 Delphi Technologies IP Limited Ensemble de buse et injecteur de carburant
WO2019068321A1 (fr) * 2017-10-04 2019-04-11 Robert Bosch Gmbh Injecteur de carburant pour le dosage de deux combustibles
CN111164290A (zh) * 2017-10-04 2020-05-15 罗伯特·博世有限公司 用于配量两种燃料的喷射阀
CN111164290B (zh) * 2017-10-04 2022-09-09 罗伯特·博世有限公司 用于配量两种燃料的喷射阀

Also Published As

Publication number Publication date
DE102015222162A1 (de) 2017-05-11

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