EP2691632B1 - Ventil zum zumessen eines mediums - Google Patents

Ventil zum zumessen eines mediums Download PDF

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Publication number
EP2691632B1
EP2691632B1 EP12705693.5A EP12705693A EP2691632B1 EP 2691632 B1 EP2691632 B1 EP 2691632B1 EP 12705693 A EP12705693 A EP 12705693A EP 2691632 B1 EP2691632 B1 EP 2691632B1
Authority
EP
European Patent Office
Prior art keywords
actuator
piston
valve
housing
guide
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
EP12705693.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2691632A1 (de
Inventor
Dietmar Schmieder
Thomas Sebastian
Andreas Jakobi
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 EP2691632A1 publication Critical patent/EP2691632A1/de
Application granted granted Critical
Publication of EP2691632B1 publication Critical patent/EP2691632B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M61/08—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 the valves opening in direction of 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
    • 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
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M63/0059—Arrangements of valve actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8015—Provisions for assembly of fuel injection apparatus in a certain orientation, e.g. markings, notches or specially shaped sleeves other than a clip
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators

Definitions

  • the invention is based on a valve for metering a medium, in particular a fluid, according to the preamble of claim 1.
  • a known injection valve for a fluid ( DE 10 2009 026 532 A1 ) has a valve housing with a valve opening, a valve needle controlling the valve opening and a piezoelectric actuator for valve needle actuation.
  • a hydraulic coupler is clamped between the actuator and a fitting inserted into the valve housing.
  • the coupler has a coupler housing with a piston guide for an axially displaceable piston, whose one piston side with the coupler housing delimits a fluid-filled coupler gap.
  • the piston is axially displaceable and fixed non-rotatably on the coupler housing via a diaphragm.
  • the coupler housing is rigidly connected to the connector.
  • the actuator has a piezo module clamped between an end plate and an end body. Between the end plate of the actuator and the valve needle on the one hand and between the piston and the coupler housing on the other hand, in each case a gimbal bearing is formed, and the connecting body of the actuator is rigidly connected to the piston of the coupler.
  • the electrical connection to the piezoelectric module of the actuator is made via the electrically conductive parts of an actuator-side contact member, and a housing-side contact member, wherein the actuator-side contact member on the closing body of the actuator and the housing-side contact member on the fixedly connected to the valve housing fitting are fixed so that the electrically conductive parts of the contact members contact each other.
  • valve according to the invention with the features of claim 1 has the advantage that by the fixing of the rotational position position of the actuator in the valve housing vorescentde rotation torsional or torsional moments that occur in valve operation by energizing the valve member and valve housing gimbaled actuator at this, directly from Valve housing are received and do not affect the electrical connection to the actuator. This avoids mechanical damage to the electrical connection and increases the service life of the valve.
  • the inclusion of the contact members of the electrical connection to the actuator in the anti-rotation saves additional construction and assembly steps and allows the reduction of manufacturing costs.
  • the housing-side or the actuator-side contact member can be used for rotational position fixation of the actuator.
  • the coupling of the piston to the actuator is realized by means of a rigid connection to the valve housing side gimbal bearing of the actuator and the piston guide mounted in the valve housing gimbal.
  • the rotation is made between the housing-side contact member and the piston guide.
  • the inclusion of the housing-side contact member in the anti-rotation has the advantage that in this made with a rigid connection of actuator and piston cardanic mounting of the piston guide in the valve housing, the rotation without additional components with little processing effort is realized.
  • the cardanic bearing between a piston guide forming, the piston receiving guide pot and a fitting inserted into the valve body is made and the rotation through the guide pot and housing-side contact member, which on the connector is fastened, realized by the fact that the housing-side contact member engages the guide pot in the circumferential direction positively.
  • the housing-side contact member has two with parallel spacing axially extending contact tongues for contacting the actuator-side contact member.
  • the rotation is formed by the contact tongues, a formed on the guide pot, radially projecting between the contact tongues Fixiernase and an existing in the connector anyway axial guide groove for the contact tongues.
  • the contact tongues are based on the one hand on the fixing lug and on the other hand on the two groove walls of the guide groove, so that there is a positive connection in the circumferential direction between the guide pot and aktor workedem contact member.
  • the electrically conductive contact tongues are encased with plastic, at least in the region of the fixing nose and fixing groove, so that a conductive connection to a guide pot made of metal is prevented.
  • the piston guide is fixed to the housing and the coupling of the piston to the actuator as a cardanic bearing for housing side gimbal bearing of the actuator.
  • the rotation is made between the actuator-side contact member and the piston.
  • the displacement of the gimbal bearing away from the piston guide of the coupler and valve housing towards the actuator and piston of the coupler avoids a constructive collision between the gimbal bearing and the lead of the electrically conductive parts of the housing-side contact member to the actuator-side contact member, which require an opening in the gimbal bearing and thus whose mechanical stability would weaken. Due to the associated housing-side fixing of the piston guide, the radial forces acting on the piston are reduced even with radial accelerations. In addition, an improved heat transfer from the coupler to the valve housing is achieved. As a result of this gimbal bearing of the actuator, the actuator-side contact member provides a structurally advantageous condition for the realization of the rotation of the actuator.
  • the gimbal bearing is formed by a conical recess in a coaxial centering pin connected to the piston on the one hand and a bearing head formed on the actuator on the other hand, which is non-positively supported in the recess of the centering pin.
  • the anti-rotation has an axial groove and in the axial groove in the circumferential direction with little play positively engaging centering, whereby axial groove and centering are divided on centering and aktor workedes contact member, so either the axial groove in the centering pin and the centering on aktor remedyen contact member or vice versa the axial groove on the actuator side Contact member and the centering nose is arranged in Zentierbolzen.
  • valve for metering a medium in particular a fluid is used for example as an injection valve for injecting fuel into the combustion cylinder of an internal combustion engine.
  • the valve has a hollow cylindrical valve housing 11, one end of which is closed by a nozzle body 12 having an orifice 13.
  • the orifice 13 is controlled by an outwardly opening valve member 14, which is designed as a valve needle with a closing head, ie closed or released.
  • the valve member 14 is actuated by a piezoelectric actuator 16 against the restoring force of a valve member 14 and on the nozzle body 12 supporting return spring 15, wherein according to the size of an applied voltage to the piezoelectric actuator 16, the valve member 14 via its closing head the orifice 13 more or less releases.
  • the actuator 16 has an electrically controllable piezo module 19, which is clamped by means of a spring body formed as a hollow body 21 between a cover plate 18 and a closing body 20.
  • the actuator 16 engages via a gimbal bearing 17 on the valve member 14, wherein the gimbal bearing 17 is formed between the Schretekopffernen end of the valve needle of the valve member 14 and the end plate 18 of the actuator 16.
  • a connector 22 is inserted, which is provided with a fluid connection 23 and an electrical connector 24. From the connector 24 is by means of an actuator-side contact member 25 and a housing-side contact member 26th made an electrical connection to the piezo module 20 of the actuator 16.
  • the electrically conductive parts of the two contact members 25, 26 contact each other and are welded together at the contact points. Alternatively, the contacting parts of both contact members 25,26 also integrally with each other, the electrically conductive parts so one piece, running.
  • a hydraulic coupler 27 is arranged, via which the actuator 16 on the valve housing 11, more precisely on the fixedly connected to the valve housing 11 connecting piece 22 is supported.
  • Actuator 16 and coupler 27 are received in a tube 53, which on the one hand on the nozzle body 12 and on the other hand attached to the connector 22, z. B. welded, is.
  • annular gap 54 Between the tube 53 and the valve housing 11 remains an annular gap 54 through which there is a connection from the fluid inlet 23 to the interior of the nozzle body 12, in which the valve needle of the valve member 14 is guided axially displaceable.
  • the hydraulic coupler 27 has a piston guide 28 and an axially displaceable, non-rotatably held piston 29 which defines a liquid-filled coupler gap 30.
  • the piston guide 28 is formed by a guide pot 31 which is received in a cup-shaped recess 32 in the connecting piece 22.
  • the coupler gap 30 is connected via a bore 33 in the pot bottom of the guide pot 31 with a compensation chamber 34 in connection, which is bounded by the pot bottom and a outside the pot bottom spanning and fixed to the outer wall of the guide pot 31 membrane 35.
  • each gimbaled or mounted piezoelectric actuator 16 torsional or torques, which can lead to damage to the electrical connection to the piezo module 19 of the actuator 16.
  • an actuator 16 is provided in its rotational position fixing anti-rotation, each one of the contact members 25, 26 of the electrical connection to the actuator 16 included in the rotation.
  • the rotation on the housing-side contact member 26 or on the actuator-side contact member 25 is fixed.
  • the piston guide 28 in the valve housing 11 in the embodiment of the valve according to Figure 1 to 7 for the housing side gimbal bearing of the actuator 16, the piston guide 28 in the valve housing 11, more precisely, in the cup-shaped recess 32 of the fitting 22 inlaid guide pot 31 on the fixedly connected to the valve housing 11 connecting piece 22, gimbals and the coupling of the piston 29 to the Actuator 16 realized by means of a rigid connection.
  • the rotation is formed between the housing-side contact member 26 and the piston guide 28, so the guide pot 31.
  • a central centering pin 36 with a protruding from the piston 29, hollow bolt head 361 is inserted into the piston 29 and the closing body 20 of the actuator 16 is provided with an axially projecting pin 201, with a reduced diameter end portion in the hollow Bolt head 361 is pressed.
  • the actuator-side contact member 25 is attached on the pin 201.
  • the housing-side contact member 26 is fixed to the connecting piece 22 and engages the formation of the rotation in the circumferential direction positively on the guide pot 31.
  • the housing-side contact member 26 is in FIG. 5 in plan view and in FIG. 6 shown in longitudinal section. It has two contact tongues 37 which extend axially in the parallel spacing and form the electrically conductive parts of the housing-side contact member 26.
  • the contact tongues 37 are encapsulated with a plastic sheath 38 and held together by a plastic bridge 55, wherein the electrically conductive parts of the actuator-side contact member 25 contacting free ends of the contact blades 37 are excluded from the plastic sheath.
  • the housing-side contact member 26 is in the in FIG. 7 in longitudinal section enlarged connector shown 22 inserted.
  • the connecting piece 22 contains two parallel longitudinal bores 39 and a guide groove 40 which extends in the region of its recess 32 and projects into the two longitudinal bores 39 (cf.
  • FIG. 4 in which the two contact tongues 37 with a tongue section I ( FIG. 6 ) einre.
  • the two contact tongues 37 are on remote from one another longitudinal sides in the tongue section I on their plastic sheath 38 on the opposite groove walls 411 of the guide groove 40 at.
  • a radially projecting between the two contact tongues 37 fixing lug 41 is formed on the guide pot 31 so that the two contact tongues 37 at the one another facing longitudinal sides over their plastic sheath 38 abut the fixing lug 42.
  • Including the housing-side contact member 26 thus the rotation of the contact tongues 37, formed by the formed on the guide pot 31 fixing lug 42 and the connecting piece 22 formed in the guide groove 40.
  • FIG. 8 illustrated valve according to a second embodiment is largely consistent with the valve described above, so that the same components are denoted by the same reference numerals, but is in the range of in FIG. 8 modified section modified.
  • the piston guide 28 is fixed to the housing and the coupling of the piston 29 of the hydraulic coupler 27 to the actuator 16 as a cardanic bearing 43 to the valve housing side gimbal bearing of the actuator 16.
  • the rotation is made between the actuator-side contact member 25 and the non-rotatably held in the housing-fixed piston guide 28 piston 29.
  • the valve housing side fixing the piston guide 28 is achieved by connecting the recess 32 in the connector 22 inlaid guide pot 31 to the connector 22, z. B.
  • the gimbal bearing 43 is formed by a conical recess 44 in the bolt head 361 of the centering pin 36 inserted into the piston 29 and by a bearing head 45 formed on the actuator 16, which is supported non-positively in the recess 44.
  • the bearing head 45 is integrally formed on the free end of the end body 20 of the Aktors16 projecting pin 201.
  • an axial groove 46 ( FIG. 9 ) formed and at the seated on the pin 201 of the end body 20 actuator-side contact member 25 has a centering nose 47 which engages positively in the axial direction 46 in the circumferential direction.
  • the actuator-side contact member 25 is shown in perspective. It has a plastic body 48 which can be pushed onto the pin 201 of the end body 20 and can be fixed there, on which two contact sheets 49 are fastened.
  • the contact plates 49 are connected to terminal lugs 50, which are guided to the piezo module 19 of the piezoelectric actuator 16.
  • the free ends of the contact tongues 37 of the housing-side contact member are located 26 on the contact plates 49 of the actuator-side contact member 25 and are welded thereto.
  • the axially displaceable and non-rotatable mounting of the piston 29 is achieved in the piston guide 28 by means of a fixed to the piston 29 and piston guide 28 membrane 51 in the hydraulic coupler.
  • the membrane 51 is fastened with its outer edge to the guide pot 31 and with its inner edge on the centering pin 36 and / or on the piston 29, wherein the diaphragm 51 terminates a liquid-tight annular gap (52) between the piston 29 and the piston guide 28.
  • the inner edge of the membrane is z. B. on the centering pin 26, alternatively on the piston 29, welded or clamped by means of the centering pin 36 on the piston 29.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
EP12705693.5A 2011-03-28 2012-02-24 Ventil zum zumessen eines mediums Not-in-force EP2691632B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110006202 DE102011006202A1 (de) 2011-03-28 2011-03-28 Ventil zum Zumessen eines Mediums
PCT/EP2012/053201 WO2012130538A1 (de) 2011-03-28 2012-02-24 Ventil zum zumessen eines mediums

Publications (2)

Publication Number Publication Date
EP2691632A1 EP2691632A1 (de) 2014-02-05
EP2691632B1 true EP2691632B1 (de) 2015-08-12

Family

ID=45757019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12705693.5A Not-in-force EP2691632B1 (de) 2011-03-28 2012-02-24 Ventil zum zumessen eines mediums

Country Status (4)

Country Link
EP (1) EP2691632B1 (zh)
CN (1) CN103459821B (zh)
DE (1) DE102011006202A1 (zh)
WO (1) WO2012130538A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012214331A1 (de) 2012-08-10 2014-02-13 Robert Bosch Gmbh Verfahren zum Herstellen einer elektrischen Verbindung
DE102013202920A1 (de) 2013-02-22 2014-08-28 Robert Bosch Gmbh Ventil zum Einspritzen von fluidem Brennstoff
DE102013203681A1 (de) 2013-03-05 2014-09-11 Robert Bosch Gmbh Ventil zum Einspritzen von fluidem Brennstoff
DE102013204103A1 (de) 2013-03-11 2014-09-11 Robert Bosch Gmbh Verfahren zum Ansteuern eines Einspritzventils
WO2020193538A1 (de) * 2019-03-24 2020-10-01 Robert Bosch Gmbh Expansionsventil

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10317148B4 (de) * 2003-04-14 2020-10-01 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10333696A1 (de) * 2003-07-24 2005-02-24 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung
DE102006013958B4 (de) * 2006-03-27 2016-11-10 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102006017927A1 (de) * 2006-04-18 2007-10-25 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102006036447A1 (de) * 2006-08-04 2008-02-07 Robert Bosch Gmbh Injektor für ein Kraftstoffeinspritzsystem
US7665445B2 (en) * 2008-04-18 2010-02-23 Caterpillar Inc. Motion coupler for a piezoelectric actuator
JP5382320B2 (ja) * 2009-03-26 2014-01-08 セイコーエプソン株式会社 圧電モーター、液体噴射装置及び時計
DE102009026532A1 (de) 2009-05-28 2010-12-02 Robert Bosch Gmbh Einspritzventil für ein Fluid

Also Published As

Publication number Publication date
CN103459821A (zh) 2013-12-18
DE102011006202A1 (de) 2012-10-04
CN103459821B (zh) 2016-05-11
WO2012130538A1 (de) 2012-10-04
EP2691632A1 (de) 2014-02-05

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