EP2472096A1 - Soupape d'injection destinée à injecter un fluide - Google Patents

Soupape d'injection destinée à injecter un fluide Download PDF

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Publication number
EP2472096A1
EP2472096A1 EP11195734A EP11195734A EP2472096A1 EP 2472096 A1 EP2472096 A1 EP 2472096A1 EP 11195734 A EP11195734 A EP 11195734A EP 11195734 A EP11195734 A EP 11195734A EP 2472096 A1 EP2472096 A1 EP 2472096A1
Authority
EP
European Patent Office
Prior art keywords
injection valve
spring
anchor pin
armature
valve according
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.)
Withdrawn
Application number
EP11195734A
Other languages
German (de)
English (en)
Inventor
Armin Schuelke
Verena Tritsch
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 EP2472096A1 publication Critical patent/EP2472096A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached 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
    • 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
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0685—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature 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
    • 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 relates to an injection valve for injecting a fluid, in particular for injecting fuel into the combustion chamber of an internal combustion engine or for injecting a reducing agent, such as an aqueous urea solution, into the exhaust gas line of a motor vehicle.
  • the injection valve comprises a liftable injection valve member for releasing or closing at least one injection opening and a solenoid actuator for actuating the injection valve member.
  • An injection valve of the aforementioned type is from the published patent application DE 196 26 576 A1 out.
  • a liftable injection valve member is a valve needle which is connected at its end remote from the injection opening with an anchor.
  • the armature cooperates with a solenoid to close and open the injector.
  • a bobbin receives the winding of the solenoid.
  • the stepped bobbin itself is received in a housing part of the injection valve and at least partially overlaps a core.
  • Both the armature and the core and the housing are made of a ferromagnetic material. Through the core, the armature and the housing, a closed magnetic flux circuit is formed, wherein the armature is pulled at electrical excitation of the magnetic coil in the direction of the core.
  • valve needle is lifted against the spring force of a return spring from its seat, causing an opening of the injector.
  • the return spring is supported on the one hand on the valve needle, on the other hand on a support plate.
  • the return spring is therefore on the side of the armature, which faces away from the core.
  • magnetic coil and core that is, for the formation of the magnetic circuit, therefore, the entire diameter of the injection valve to disposal.
  • a larger actuator force can be achieved.
  • the present invention seeks to provide an injection valve with a solenoid actuator for direct actuation of an injection valve member, the efficiency is improved at the same installation space.
  • the proposed injection valve comprises a hubbewegliches injection valve member for releasing or closing at least one injection port and a magnetic actuator with a coil, an inner pole and a lifting armature, which is energized against the spring force of a spring in the direction of the inner pole when energizing the coil, wherein the spring on the Side of the armature is arranged, which faces away from the inner pole.
  • the armature comprises an anchor plate and an anchor pin, wherein the anchor pin is hydraulically coupled via a control volume with the injection valve member.
  • the control volume as a hydraulic coupler volume allows depending on the selected area ratio of the hydraulic effective surfaces formed on the injection valve member and the anchor pin a force or displacement ratio.
  • the force or displacement transmission allows the use of a smaller Magnetaktors or higher injection pressures with the same size Magnetaktor.
  • the dynamics of the armature is increased by releasing the composite of armature and injection valve member.
  • the spring for returning the armature is designed as a helical compression spring. This can then be arranged so that it surrounds the anchor pin of the armature. In this way, a space-saving compact arrangement is created.
  • the spring for returning the armature is supported directly or indirectly on the anchor pin.
  • a radially extending shoulder for supporting the spring is formed on the anchor pin or on a disk-shaped component connected to the anchor pin.
  • the anchor pin can therefore also be constructed in several parts. If the radially extending shoulder is formed directly on the anchor pin itself, this is preferably done in the form of a section-wise increase in diameter.
  • the anchor pin can also have an increase in diameter as a support surface for such a disk-shaped component.
  • the anchor pin may have a circumferential groove or cut (two-flattened) into which the disk-shaped component is inserted. Preferably, the insertion takes place with installation of the injection valve.
  • the disc-shaped component connected to the anchor pin has a central opening for receiving the anchor pin, wherein the central opening is guided radially outward, so that the disk-shaped component is interrupted. Due to the interruption, it is possible to postpone the disc-shaped component from the side.
  • This type of connection facilitates in particular the insertion of the disk-shaped component in a circumferential groove of the anchor pin.
  • the disc-shaped component has a centering, by means of which it is secured against radial displacement.
  • a fixation of the spring over the disc-shaped member is permanently ensured.
  • a passage hole or blind hole may be provided in the anchor plate into which the anchor pin is inserted.
  • An inserted into a blind hole anchor pin has the advantage that with worse soft magnetic properties of the material of the anchor pin against the material of the anchor plate, the actuator force can be further increased.
  • the spring is preferably supported with a further end on a housing part or on a plate-shaped component connected to a housing part.
  • the housing part or the plate-shaped component has a central bore for receiving the anchor pin, which is guided through the housing part or the plate-shaped component. This can also be designed as a guide for the anchor pin.
  • the side facing away from the spring of the housing part or the plate-shaped component can serve as a stop surface for the anchor plate and thus the stroke limit of the armature. In order to avoid stray fluxes over the back of the housing part or the plate-shaped component, this is preferably made of an amagnetic material. As a result, the actuator force can also be increased.
  • the housing part or the plate-shaped component can have openings through which the fluid to be injected can flow. Thus, hydraulic deflections are avoided and ensures optimum flow control.
  • the composite of anchor pin, anchor plate, spring and possibly plate-shaped member for supporting the spring can first be mounted outside of the space and then used as a part.
  • the spring can then be axially biased, so that all parts are easy to assemble.
  • the anchor pin is further surrounded by a liftable sleeve, which serves as a hydraulic translator and is hydraulically coupled to the force and / or Wegverstärkung with the injection valve member.
  • a liftable sleeve which serves as a hydraulic translator and is hydraulically coupled to the force and / or Wegverstärkung with the injection valve member.
  • the sleeve can be inserted in a guide bore of a housing part of the injection valve, preferably in a guide bore of the valve body, and possibly supported on the housing part via a collar region.
  • the sleeve also be supported on a further housing part of the injection valve, preferably on the nozzle body.
  • the injection valve according to the invention is composed of several housing parts.
  • a first housing part is the nozzle body 15, in which a needle-shaped injection valve member 1 is received, via the lifting movement at least one injection port (not shown) is releasable or closable.
  • a high pressure line 14 the side is formed in the nozzle body 15, the fluid to be injected is guided in the direction of the injection opening.
  • the injection valve member 1 limits the nozzle body 15, a control volume 7, via which the injection valve member 1 with an armature 5 of a solenoid actuator 2 is hydraulically coupled.
  • the armature 5 is designed as a replacement anchor and has an anchor plate 5. 1 and an anchor pin 5.2 connected thereto.
  • the armature 5 is received in a further housing part 11, which is attached to the nozzle body 15 and connected by means of a clamping nut 18 with this.
  • a valve body which is designed in several parts in the illustrated embodiment. Between two parts of the valve body, a plate-shaped member 12 is inserted with a central bore through which the anchor pin 5.2 of the armature 5 is guided.
  • the anchor plate 5.1 is arranged on the injection valve member 1 side facing away from the plate-shaped member 12.
  • the plate-shaped component 12 serves to support a spring 6, whose spring force acts on the armature 5 in a direction which is opposite to the opening stroke of the injection valve member 1. To raise the injection valve member 1, therefore, the spring force of the spring 6 must be overcome.
  • a coil 3 of the magnetic actuator 2 is energized, resulting in the formation of a magnetic circuit extending over an inner pole 4 of the magnetic actuator 2. Since the inner pole 4 - apart from flow channels, not shown, such as one or more grooves or an annular gap - is formed as a solid body, the entire cross section of the inner pole 4 for forming the magnetic circuit is available, which causes a high force acting on the armature 5 magnetic force , The armature 5 moves against the spring force of the spring 6 in the direction of the inner pole 4. If the energization of the coil 3 is completed, the spring 6 ensures the return of the armature 5 in its initial position. For this purpose, the spring 6 is supported with its other end on a radially extending shoulder 9 of the anchor pin 5.2.
  • the hydraulic coupling of the injection valve member 1 with the armature 5 has the advantage that on the area ratio of the hydraulically active surfaces, a force or path gain can be achieved, so that the use of a magnetic actuator 2 for direct actuation of the injection valve member 1 is possible.
  • a force amplification is effected.
  • the area ratio is chosen vice versa, a path gain is effected.
  • Fig. 2 shows a development of the embodiment of the Fig. 1 , which additionally comprises a liftable sleeve 13 as a distinguishing feature, which surrounds the anchor pin 5.2.
  • the sleeve 13 is also hydraulically coupled via the control volume 7 with the injection valve member 1, so that a further hydraulically effective surface is available for the realization of a force and / or path gain.
  • the sleeve 13 is designed as a collar sleeve, the collar of the support of the sleeve 13 on the housing part 11 and thus the stroke limit is used.
  • the sleeve 13 can also be supported on its end face on the nozzle body 15, so that the federal government can be omitted.
  • This variant is exemplary in the Fig. 3 shown.
  • the injection valve member 1 can be acted upon in the opening direction by the spring force of a spring 16, as shown in the Fig. 2 is indicated.
  • Fig. 3 is different from that of Fig. 2 further characterized in that the anchor pin 5.2 is inserted in a blind hole of the anchor plate 5.1. If the anchor pin 5.2 is made of a material which has poorer soft magnetic properties than that of the anchor plate 5.1, this nevertheless has no negative influence on the actuatable actuator force. In this case, the in Fig. 3 illustrated embodiment against the of Fig. 2 the advantage of increased actuator power.
  • Fig. 4 shows a further preferred embodiment of the invention.
  • the sleeve 13 is again designed as a simple sleeve and supported on the nozzle body 15.
  • the opening stroke of the injection valve member 1 is supported by the spring force of a spring 16.
  • the housing part 11 and the valve body is made in one piece, so that a separate plate-shaped component 12 is dispensable. This advantageously reduces the number of high pressure sealing points.
  • a sealing ring 17 is inserted.
  • the valve body has instead of a separate plate-shaped member 12 has a radially inwardly projecting shoulder, which at the same time as a guide 19 serves for the anchor pin 5.2. This is executed in several parts, in contrast to the previous examples and comprises a disc-shaped member 8 for forming a radially extending shoulder 9, on which the spring 6 is supported.
  • a circumferential groove or key surfaces can be formed on the anchor pin 5.2, into which the disk-shaped component 8 is inserted.
  • the anchor pin 5.2 can also be a paragraph formed by a first disc-shaped member 8.1, which is fixedly connected to the anchor pin 5.2 and serves to receive a second disk-shaped member 8.2.
  • This variant is exemplary in the Fig. 5 shown.
  • this is provided with an opening 10 which is formed asymmetrically and the component breaks through 8.2 (see Fig. 6 ).
  • the spring 5 serving to restore the armature 5 can be fixed during the assembly of the injection valve.
  • the two disc-shaped components 8.1 and 8.2 may also be designed as a component 8.
  • the component 8 preferably has a centering 20, via which it is secured against radial displacement (see Fig. 7 ).

Landscapes

  • 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)
EP11195734A 2011-01-04 2011-12-27 Soupape d'injection destinée à injecter un fluide Withdrawn EP2472096A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201110002422 DE102011002422A1 (de) 2011-01-04 2011-01-04 Einspritzventil zum Einspritzen eines Fluids

Publications (1)

Publication Number Publication Date
EP2472096A1 true EP2472096A1 (fr) 2012-07-04

Family

ID=45495677

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11195734A Withdrawn EP2472096A1 (fr) 2011-01-04 2011-12-27 Soupape d'injection destinée à injecter un fluide

Country Status (2)

Country Link
EP (1) EP2472096A1 (fr)
DE (1) DE102011002422A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8097967B2 (en) 2008-06-30 2012-01-17 Demand Energy Networks, Inc. Energy systems, energy devices, energy utilization methods, and energy transfer methods
DE102013224863A1 (de) 2013-12-04 2015-06-11 Robert Bosch Gmbh Magnetaktor für einen Kraftstoffinjektor sowie Kraftstoffinjektor
DE102016206882A1 (de) * 2016-04-22 2017-10-26 Zf Friedrichshafen Ag Magnetaktor, Ventil und Sperrvorrichtung mit einem Druckübersetzer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19626576A1 (de) 1996-07-02 1998-01-08 Bosch Gmbh Robert Brennstoffeinspritzventil
DE102007002758A1 (de) * 2006-04-04 2007-10-11 Robert Bosch Gmbh Kraftstoffinjektor
DE102009047559A1 (de) * 2009-12-07 2011-06-09 Robert Bosch Gmbh Kraftstoffinjektor
EP2386746A2 (fr) * 2010-05-11 2011-11-16 Robert Bosch GmbH Injecteur de carburant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19626576A1 (de) 1996-07-02 1998-01-08 Bosch Gmbh Robert Brennstoffeinspritzventil
DE102007002758A1 (de) * 2006-04-04 2007-10-11 Robert Bosch Gmbh Kraftstoffinjektor
DE102009047559A1 (de) * 2009-12-07 2011-06-09 Robert Bosch Gmbh Kraftstoffinjektor
EP2386746A2 (fr) * 2010-05-11 2011-11-16 Robert Bosch GmbH Injecteur de carburant

Also Published As

Publication number Publication date
DE102011002422A1 (de) 2012-07-05

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