EP2664779B1 - Soupape pour le dosage de fluide - Google Patents

Soupape pour le dosage de fluide Download PDF

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Publication number
EP2664779B1
EP2664779B1 EP13160890.3A EP13160890A EP2664779B1 EP 2664779 B1 EP2664779 B1 EP 2664779B1 EP 13160890 A EP13160890 A EP 13160890A EP 2664779 B1 EP2664779 B1 EP 2664779B1
Authority
EP
European Patent Office
Prior art keywords
valve
valve needle
needle
slot
deformation
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.)
Active
Application number
EP13160890.3A
Other languages
German (de)
English (en)
Other versions
EP2664779A1 (fr
Inventor
Jens Pohlmann
Philipp Rogler
Axel Bormann
Anselm Berg
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 EP2664779A1 publication Critical patent/EP2664779A1/fr
Application granted granted Critical
Publication of EP2664779B1 publication Critical patent/EP2664779B1/fr
Active 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
    • F02M51/061—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
    • F02M51/0671—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
    • F02M51/0682—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 the body being hollow and its interior communicating with the fuel flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • 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
    • 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
    • F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means

Definitions

  • a magnet armature of a valve needle actuating electromagnet frictionally fixed on the valve needle is a magnet armature of a valve needle actuating electromagnet frictionally fixed on the valve needle.
  • the valve needle has a closing body, which forms a sealing seat together with the valve seat at the valve opening.
  • a return spring which is supported between the end of the valve needle facing away from the closing body and an adjusting sleeve, presses the closing body onto the valve seat.
  • the valve needle has a collar-shaped anchor stop and a Mitauerflansch, between which the magnet armature is able to move axially on the valve needle.
  • a Vorhubfeder presses the armature to the anchor stop.
  • Ankerkeweg are off DE 198 49 210 A1 .
  • a fuel injection valve with an electromagnetic actuator is known.
  • This valve is characterized in that a needle of this needle valve is provided for an electromechanical fuel injection device comprising the needle valve which is movable in first and second directions to abut and lift off a valve seat assembly, the needle being of the shape a pipe and has damping means.
  • the valve seat in the valve seat assembly forms a stop for the needle valve as it moves in the first direction.
  • the needle has a plurality of grooves, grooves or corrugations around the circumference of the tube to reduce rebound movements of the needle valve when the valve needle contacts the valve seat by reducing the axial and bending spring rate of the needle valve. In this way, the vibration behavior of the needle is changed to achieve control over the rebounding movements.
  • the metering valve according to the invention with the features of claim 1 has the advantage that the advantages of the valves with so-called.
  • Ankerkaweg such as avoid bouncing and mechanical booster, preserved by the formation of the valve needle with different stiffness in tension and compression direction, without the disadvantages associated with these known structural designs of these valves, such as a variety of components and joints, high manufacturing costs, dependency on manufacturing tolerances and fluid used by existing hydraulic crimp, exhibit.
  • the number of components in the valve according to the invention is not greater than for valves with a rigid connection Actuator and valve needle, and accordingly simplifies the assembly process. Since less function-determining tolerances are to be observed, the production costs and the sample spread in the functional values, in particular in the quantitative metering of fluid, are reduced.
  • the predetermined load from which elastic deformations of the valve needle occur chosen smaller than the sum of the minimum allowable restoring or closing force acting in the pressure direction on the valve needle return member and a minimum existing closing force of the fluid the valve needle is exerted with closing body.
  • acting on the valve needle in the compression direction greater closing forces occurs elastic deformation of the valve needle one.
  • the closing body Due to the increasing deformation with increasing stiffness of the valve needle, the closing body is pressed more strongly on the valve seat, so that a defined assignment of actuator and valve needle is ensured in the idle state of the closed valve, such as always a constant working air gap between the armature and magnetic core of the solenoid is present ,
  • a hollow valve needle can be rolled out of a metal sheet with at least two preferably punched-out recesses of limited axial length, wherein two recesses each diametrically opposed in the hollow valve needle form a slot.
  • the parallel to the longitudinal edges extending joints of the sheet are materially connected to each other, eg welded.
  • a hollow valve needle of two bent sheets are assembled, each having at least one parallel to the longitudinal edges of the sheet extending, preferably punched recess of limited axial length and are integrally connected to the abutting longitudinal edges together so that in turn two in the hollow valve needle each diametrically opposed recesses form a slot.
  • a directed buckling or buckling of the Veformungsstege is determined and supported according to an advantageous embodiment of the invention by joints, which are incorporated at the slot ends and in the slot center of at least one slot in the valve needle and preferably formed by cross-sectional constrictions in the deformation webs.
  • cross-sectional constrictions are realized in accordance with an advantageous embodiment of the invention by a respective inserted into the valve needle transverse bore at each of the two slot ends and introduced into the valve needle, circumferential groove in slot center, so buckle the deformation webs when exceeding the predetermined load, the so-called.
  • Buckling load inside and support each other. The mutual support increases the rigidity of the valve needle in the pressure direction.
  • the buckling of the deformation webs inward can also be achieved in that the deformation webs are pre-bent by plastic deformation from its extended position by a few degrees inwards.
  • cross-sectional constrictions are realized according to an advantageous embodiment of the invention by a respective inserted into the valve needle, circumferential groove at the slot ends and introduced into the valve needle transverse bore in slot center, so buckle the deformation webs when exceeding the buckling load to the outside.
  • the rigidity of the valve needle increases in the printing direction.
  • the buckling of the deformation webs to the outside can also be promoted according to an alternative embodiment of the invention in that the deformation webs are pre-bent by plastic deformation from the extended position by a few degrees outwards.
  • valve for metering fluid is used for example as an injection valve for injecting fuel in a fuel injection system of internal combustion engines.
  • the valve has a sleeve-shaped valve housing 11, in whose literallyess workedes end a valve body 12 and in its inlet end a not shown here Connecting piece for connecting a fluid line for the fluid inlet 10 is used fluid-tight.
  • the valve body 12 is materially connected to the valve housing 11, wherein the material connection is symbolized by the weld 13.
  • a metering or valve opening 14 is formed with a valve seat 15 surrounding the valve opening 14.
  • valve needle 16 has at its valve opening 14 facing, literallyess districten needle end on a closing body 161 which forms a sealing seat with the valve seat 15.
  • the closing body 161 is here formed like a ball and welded to the front end of the here massive valve needle 16. However, the closing body 161 can also be designed in one piece with the valve needle 16.
  • the sealing seat 16 is produced or canceled by actuating the valve needle 16.
  • the valve needle 16 is loaded to produce the sealing seat by a return member 18 to pressure and to cancel the sealing seat of an actuator 19 to train.
  • the return member 18 is formed as a compression spring 17 and the actuator 19 as an electromagnet 20.
  • other actuators 19 may be used, for. B. a piezoelectric or magnetostrictive actuator.
  • the compression spring 17 is supported on the one hand on the armature 24 and on the other hand on an adjustment sleeve 26 which is screwed into the magnetic core 23.
  • flow channels 27 are held, which produce via the adjusting sleeve 26 a fluid connection from the inlet 10 to one of the valve opening 14 upstream, enclosed by the valve body 12 and the valve housing 11 valve chamber 28.
  • the magnetic coil 22 is by means of an electric Connection plug 29 can be energized.
  • the connecting piece for the fluid supply line and a connector housing 29 enclosing, not shown here plug housing are formed by a plastic casing which also at least partially surrounds the magnet pot 21 (not shown here).
  • the valve needle 16 shown in the exemplary embodiments has different stiffnesses in the direction of tension and compression in such a way that the valve needle 16 is almost invariably stiff when loaded in the direction of pull, but under load in the direction of pressure a stiffness permitting elastic deformations until a predetermined load is reached has and on the other hand assumes an increased stiffness after the occurrence of deformations.
  • the predetermined load hereinafter referred to as buckling load, is preferably selected to be smaller than the sum of the minimum allowable restoring or closing force of the pressure acting on the valve needle 16 return member 18, so the pressure force of the compression spring 17, and the minimum existing closing force, the Fluid is exerted on the valve needle 16 with closing body 161.
  • valve needle 16 has at least one pair of diametrically opposed deformation webs 30 in at least one needle section, which on reaching the predetermined load, so the buckling load, elastically on or buckle.
  • FIG. 5 are in a needle portion of the valve needle 16 has two pairs of diametrically opposed each deformation webs 30.
  • FIG. 6 is in two axially successive needle portions of the valve needle 16 each have a pair of mutually opposite deformation webs 30 available.
  • At least one slot 31 extending in the axial direction of the valve needle 16 with a limited slot length is introduced into the massive valve needle 16.
  • the valve needle 16 has only one slot 31.
  • valve needle 16 of the closing body 161 Due to the lower rigidity of the valve needle 16 of the closing body 161 remains after the first touch on the valve seat 15 in the valve seat 15, while the armature 24 due to the changing distance of the In the middle of the two deformation webs 30, so by "breathing" of the slot 31, can swing up and down and its energy dissipates by its movement in the fluid.

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)
  • Magnetically Actuated Valves (AREA)

Claims (11)

  1. Soupape pour le dosage de fluide, avec une ouverture de soupape (14) pouvant être parcourue par un fluide, laquelle est entourée par un siège de soupape (15), avec un pointeau de soupape (16) qui, pour former un siège d'étanchéité au niveau de l'ouverture de soupape (14), présente un corps de fermeture (161) coopérant avec le siège de soupape (15), avec un organe de rappel (18) qui, pour établir le siège d'étanchéité, sollicite le pointeau de soupape (16) en pression et avec un actionneur (19) qui, pour supprimer le siège d'étanchéité, sollicite le pointeau de soupape (16) en traction, le pointeau de soupape (16) présentant dans la direction de traction et la direction de pression différent des rigidités de telle sorte que le pointeau de soupape (16), lors de la sollicitation dans la direction de traction, soit rigide de manière quasiment non déformable et, lors de la sollicitation dans la direction de pression, présente une rigidité permettant des déformations élastiques jusqu'à l'obtention d'une charge prédéterminée et adopte par contre une rigidité accrue après l'apparition des déformations, caractérisée en ce que le pointeau de soupape (16) présente, dans au moins une portion du pointeau, au moins une paire de bandes de déformation (30) pouvant fléchir élastiquement vers l'intérieur ou vers l'extérieur à l'obtention de la charge prédéterminée, lesquelles sont diamétralement opposées, et en ce que pour obtenir les bandes de déformation (30), au moins une fente (31) s'étendant dans la direction axiale du pointeau de soupape (16) est pratiquée dans le pointeau de soupape massif ou creux (16) dans au moins une portion du pointeau avec une longueur de fente limitée.
  2. Soupape selon la revendication 1, caractérisée en ce que la charge prédéterminée est inférieure à la somme d'une force de rappel minimale admissible de l'organe de rappel (18) agissant dans la direction de pression sur le pointeau de soupape (16) et d'une force de fermeture minimale présente qui est exercée par le fluide sur le pointeau de soupape (16) par le corps de fermeture (161).
  3. Soupape selon la revendication 1 ou 2, caractérisée en ce que pour obtenir les bandes de déformation (30), le pointeau de soupape (16) est laminé à partir d'une tôle avec au moins deux évidements de longueur axiale limitée et de préférence en ce que les zones d'extrémité de la tôle s'étendant parallèlement aux arêtes longitudinales des évidements sont soudées l'une à l'autre.
  4. Soupape selon la revendication 1 ou 2, caractérisée en ce que pour obtenir les bandes de déformation (30), le pointeau de soupape (16) est assemblé à partir de deux tôles cintrées qui présentent chacune au moins un évidement de longueur axiale limitée s'étendant parallèlement aux arêtes longitudinales de la tôle et qui sont soudées l'une à l'autre au niveau des arêtes longitudinales en aboutement.
  5. Soupape selon l'une quelconque des revendications 1 à 4, caractérisée en ce qu'au niveau des deux extrémités de fente et au milieu de la fente de l'au moins une fente (31), des zones d'articulation favorisant la flexion élastique des bandes de déformation (30) sont réalisées dans le pointeau de soupape (16).
  6. Soupape selon la revendication 5, caractérisée en ce que les zones d'articulation sont formées par des rétrécissements de la section transversale (32) dans les bandes de déformation (30).
  7. Soupape selon la revendication 6, caractérisée en ce que le rétrécissement de section transversale (32) est réalisé au niveau de chacune des deux extrémités de fente par un orifice transversal (33) pratiqué dans le pointeau de soupape (16) et le rétrécissement de section transversale (32) est réalisé au centre de la fente par une rainure périphérique (34) pratiquée dans le pointeau de soupape (16).
  8. Soupape selon la revendication 6, caractérisée en ce que le rétrécissement de section transversale (32) est réalisé au niveau de chacune des deux extrémités de fente par une rainure périphérique (34) pratiquée dans le pointeau de soupape (16) et le rétrécissement de section transversale (32) est réalisé au centre de la fente par un orifice transversal (33) pratiqué dans le pointeau de soupape (16).
  9. Soupape selon la revendication 1, caractérisée en ce que les bandes de déformation (30) sont cintrées de quelques degrés vers l'intérieur ou vers l'extérieur hors de leur étendue axiale par une déformation plastique.
  10. Soupape selon l'une quelconque des revendications 1 à 9, caractérisée en ce que l'actionneur (19) est formé par un électroaimant (20) avec un induit magnétique (24) et l'induit magnétique (24) repose fixement sur le pointeau de soupape (16), de préférence est connecté à celui-ci par engagement par liaison de matière.
  11. Soupape selon la revendication 10, caractérisée en ce que pour obtenir les bandes de déformation (30), le pointeau de soupape (16) est laminé à partir d'une tôle avec au moins deux évidements de longueur axiale limitée et l'induit magnétique (24) et le corps de fermeture (161) sont posés par engagement par liaison de matière sur la tôle laminée, de préférence sont soudés sur celle-ci.
EP13160890.3A 2012-05-15 2013-03-25 Soupape pour le dosage de fluide Active EP2664779B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012208136A DE102012208136A1 (de) 2012-05-15 2012-05-15 Ventil zum Zumessen von Fluid

Publications (2)

Publication Number Publication Date
EP2664779A1 EP2664779A1 (fr) 2013-11-20
EP2664779B1 true EP2664779B1 (fr) 2016-01-20

Family

ID=48044597

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13160890.3A Active EP2664779B1 (fr) 2012-05-15 2013-03-25 Soupape pour le dosage de fluide

Country Status (2)

Country Link
EP (1) EP2664779B1 (fr)
DE (1) DE102012208136A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014226407A1 (de) 2014-12-18 2016-06-23 Robert Bosch Gmbh Einspritzdüse für Kraftstoffe
DE102015211667A1 (de) * 2015-06-24 2016-12-29 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
DE102015212467A1 (de) * 2015-07-03 2017-01-05 Robert Bosch Gmbh Einspritzdüse für ein Kraftstoffeinspritzsystem
DE102016225939A1 (de) 2016-12-22 2018-06-28 Robert Bosch Gmbh Elektromagnetisch betätigbares Ventil und Verfahren zur Herstellung einer Ventilnadel für ein elektromagnetisch betätigbares Ventil
DE102017116214A1 (de) * 2017-07-18 2019-01-24 L'orange Gmbh Düsennadel für einen Kraftstoffinjektor, Kraftstoffinjektor sowie Einspritzsystem für eine Brennkraftmaschine
JPWO2021090388A1 (fr) * 2019-11-06 2021-05-14

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5636827A (en) * 1994-09-20 1997-06-10 Siemens Automotive Corporation Notched needle bounce eliminator
DE19849210A1 (de) 1998-10-26 2000-04-27 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19932763A1 (de) 1999-07-14 2001-01-18 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19946602A1 (de) 1999-09-29 2001-04-12 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10108945A1 (de) 2001-02-24 2002-09-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE102011078732A1 (de) * 2011-07-06 2013-01-10 Robert Bosch Gmbh Vorrichtung zur Einspritzung von Kraftstoff

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Publication number Publication date
DE102012208136A1 (de) 2013-11-21
EP2664779A1 (fr) 2013-11-20

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