[go: up one dir, main page]

WO2007116007A1 - PIEZO-ACTIONNEUR, PROCEDE DE FABRICATION D'UN PIEZO-ACTIONNEUR ET SYSTEME D'INJECTION DOTE d'un tel piézo-actionneur - Google Patents

PIEZO-ACTIONNEUR, PROCEDE DE FABRICATION D'UN PIEZO-ACTIONNEUR ET SYSTEME D'INJECTION DOTE d'un tel piézo-actionneur Download PDF

Info

Publication number
WO2007116007A1
WO2007116007A1 PCT/EP2007/053346 EP2007053346W WO2007116007A1 WO 2007116007 A1 WO2007116007 A1 WO 2007116007A1 EP 2007053346 W EP2007053346 W EP 2007053346W WO 2007116007 A1 WO2007116007 A1 WO 2007116007A1
Authority
WO
WIPO (PCT)
Prior art keywords
piezoelectric actuator
spring
force
nozzle needle
closing
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.)
Ceased
Application number
PCT/EP2007/053346
Other languages
German (de)
English (en)
Inventor
Hellmut Freudenberg
Richard Pirkl
Udo REILÄNDER
Dejan Jovovic
Maximilian Kronberger
Matthias Wicke
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.)
Siemens AG
Continental Automotive GmbH
Siemens Corp
Original Assignee
Siemens AG
Continental Automotive GmbH
Siemens Corp
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 Siemens AG, Continental Automotive GmbH, Siemens Corp filed Critical Siemens AG
Publication of WO2007116007A1 publication Critical patent/WO2007116007A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • F02M61/16—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
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • 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
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials

Definitions

  • Piezo actuator method for producing a piezo actuator and injection system with such
  • the invention relates to a piezoelectric actuator, a method for producing a piezoelectric actuator and an injection system with a piezoelectric actuator.
  • Injection systems require a control, such as ⁇ example, a piezo actuator in the high pressure chamber.
  • the technical field of the invention relates in particular to piezo-controlled common rail injectors or injection systems without leak oil return with a piezo actuator or a piezo actuator for opening and closing a nozzle by means of a nozzle needle in the high pressure chamber, a hydraulic longitudinal compensation device or return device and a lever translator For actuating the nozzle needle.
  • the return device has a hole in the bottom plate of the
  • a single injection system is known, for example, 101 45 620 B4 be ⁇ from DE.
  • Another disadvantage of conventional injection systems is that, depending on manufacturing tolerances and elastic deformations due to external and internal forces acting on the piezoelectric actuator, a widely varying idle stroke can occur. These idle stroke differences can be compensated, inter alia, by the hydraulic longitudinal compensation device described above.
  • Another object of the present invention is to provide a piezoactuator in which a closing force dependent on the fuel pressure is reduced.
  • the closing force should be reduced at the beginning of the opening of the nozzle.
  • Another task is len a piezo actuator equipstel- in which differences in stroke in successive Actuate the ⁇ the nozzle needle movements are minimized or avoided.
  • a piezoactuator for injecting fuel at a predetermined fuel pressure which comprises:
  • a nozzle needle for opening and closing a nozzle into which the fuel is injected
  • controllable piezo stack which provides a function ei ⁇ nes control signal for actuating a stroke of the nozzle needle in a closing direction or an opening direction
  • a spring device which provides a force depending on the fuel ⁇ pressure, which counteracts at least partially acting on the nozzle needle and acting in the closing direction closing force.
  • the piezoelectric actuator according to the invention is that the force provided by the spring device counteracts the closing force in such a way that the opening of the nozzle is assisted.
  • the spring device thus acts as an energy store for supporting the opening of the nozzle. Overall, therefore, the piezo stack, which performs the lifting of the nozzle needle from the nozzle seat, bring less energy ⁇ . Consequently, the power loss of the piezo actuator is reduced. It is particularly advantageous that the of the
  • the fuel pressure always affects the closing force, but it also controls the closing force ⁇ counteracting force of the spring device according to the invention.
  • the compensated provided by the spring means force ma ⁇ Siert ximal 90%, especially a maximum of 80% of the cross at the nozzle needle to ⁇ and acting in the closing direction of the closing force.
  • the piezoelectric actuator has a restoring device, which is adapted to reset the piezoelectric stack in a predetermined starting position, and which has at least one coupled between the piezo-stack and the nozzle needle piston device, which provided the hub transfers.
  • the restoring device already provides a restoring force for resetting the piezoelectric stack, which is smaller than a minimum force in all operating states of the piezoelectric actuator to the
  • Opening the nozzle is necessary. Thus, an undesirable nozzle needle opening is prevented.
  • the opening of the nozzle is 200602289
  • a lever transmission device for translating the stroke transmitted by the piston device into an enlarged stroke, which has a piezo-side lever, which is coupled to the piston device, and a nozzle needle-side lever, which is coupled to the nozzle needle.
  • the lever translation device has the particular advantage of minimizing the necessary stroke to be provided by the piezo stack and thus the necessary energy to be provided by the piezo stack. Thus, the power loss of the piezo actuator is further minimized.
  • the restoring device comprises at least one return spring and a spring plate, wherein the spring plate is supported on a housing of the piezo stack and / or the return spring between see a bottom plate of the piezo stack and the spring plate is arranged.
  • the return device further comprises the piston device, which engages in a bore of the bottom plate of the piezo stack, and a hydraulic ⁇ cal volume, in particular a fuel volume with the predetermined fuel pressure, between the bottom plate and the coupling device.
  • the spring device between the restoring device and the lever-translating device is arranged such that the force provided by the spring device acts exclusively counter to the closing direction of the closing force.
  • the support of opening the nozzle by the force provided by the spring device is optimal.
  • the spring device is disc-shaped, wherein the return 200602289
  • the lever translation device and the lever translation device are connected by a hole of the disc-shaped spring device and the disc-shaped spring device is coupled at its Jardinrandbe- rich with the lever translation device.
  • the spring device is designed as a biasing element, which is connected in series with the return spring and is biased by the applied fuel pressure.
  • a particular advantage of the spring device designed as a biasing element is that the force provided by it, which counteracts the closing force, is independent of the stroke of the nozzle needle.
  • the biasing element is annular, wherein the annular biasing element comprises in particular the bottom plate of the piezoelectric stack.
  • the annular biasing member has a cross section which is characterized by a major axis and a minor axis.
  • the cross section is substantially diamond-shaped or substantially elliptical.
  • the annular biasing element is arranged such that the main axis or the minor axis runs parallel to the closing direction . This parallel arrangement results in an opti ⁇ male effect of the provided by the spring device or the biasing force against the closing force.
  • the annular biasing element has a cavity.
  • the cavity is filled with a fluid, a gas, a liquid, a free-flowing material, a polymer and / or an elastomer for adjusting the spring constants of the annular biasing element.
  • the spring constant of the biasing element in particular depending on the predetermined fuel pressure can be adjusted.
  • the piezoelectric actuator is arranged in a high pressure chamber of an injection system, which is designed in particular as a common rail injection system.
  • Fig. 1 is a schematic longitudinal sectional view of a first embodiment of the piezoelectric actuator according to the invention
  • FIG. 2 shows a schematic longitudinal sectional view of a second exemplary embodiment of the piezoactuator according to the invention
  • Fig. 3 is a cross-section of a first embodiment of the annular biasing member according to the ahead ⁇ invention
  • FIG. 5 shows a cross section of a thirdheldsbei ⁇ game of the annular biasing element according to the present invention.
  • Fig. 6 is a schematic flow diagram of a preferred embodiment of the method according to the invention.
  • the exemplary embodiments of the piezoactuator 1 according to the invention for injecting fuel at a predetermined fuel pressure P have in common that they include a nozzle needle 2 for opening and closing a nozzle 18, into which the fuel is injected, a controllable piezoelectric stack 3, which in response to a control signal (not shown) provides a stroke for actuating the nozzle needle 2 in a closing direction Rl or in an opening direction R2, and a spring device 6 which, depending on the fuel pressure P provides a force which at least partially on the nozzle needle 2 angrei ⁇ fenden and acting in the closing direction Rl closing force counteracted.
  • the piezoelectric actuator 1 preferably has a hydraulic return ⁇ adjusting device 5, which is adapted to reset the piezoelectric stack 3 in a predetermined starting position.
  • the hydraulic return device 5 has a coupled between the piezo-stack 3 and the nozzle needle 2 Kolbenvor ⁇ direction 4, which transmits the provided stroke.
  • the return device 5 generates a restoring force 200602289
  • a lever transmission device 7 is provided for translating the transmitted from the piston device 4 stroke in an enlarged stroke.
  • the lever transmission device 7 has a piezo-side lever 8, which is coupled to the piston device 4, and a nozzle needle-side lever 9, which is coupled to the nozzle needle 2.
  • the nozzle needle 2 is preferably integrated in a nozzle body 19.
  • the return device 5 at least one return spring 10 and a spring plate 11, wherein the spring plate 11 is supported on a housing 12 of the piezo stack 3 and / or the return spring 10 disposed between a bottom plate 13 of the piezo stack 3 and the spring plate 11 is.
  • the return device 5 is insbesonde ⁇ re by the engaging in the bore of the bottom plate 13 of the piezoelectric stack 3 piston device 4, a volume of the
  • Fuel with the predetermined fuel pressure P between the bottom plate 13 and the piston device 4 and the return spring 10 is formed. All volumes within the piezo-actuator 1, which have fuel with the predetermined fuel pressure P are indicated by the reference P.
  • the spring device 6 interim ⁇ rule invention the leverage apparatus 7, and see the hydraulic return device 5 is arranged.
  • the spring device 6 generates a fuel pressure P proportional counterforce on the piezo comparativen lever 8 of the lever translation device 7, because with increasing fuel pressure P, the nozzle needle 2 shortened as a result of closing force increase and the nozzle body 19 extended.
  • the force initiation ⁇ is point 20 of the piezo-sided lever displaced in the direction of the spring device 6. 8
  • reference symbol R3 shows the expansion direction of spring device 6
  • reference symbol R4 shows the compression direction of nozzle needle 2
  • reference symbol R5 denotes the elongation direction of nozzle body 19.
  • the vertical sealing gap D between the piston device 4 and the bottom plate 13 on the piston side a cylindrical or spherical surface with a very shortchonaus ⁇ expansion. Because of the alignment of the piston end face of the piston device 4 by the disk-shaped spring device 6, the piston device 4 is guided in the bore of the bottom plate 13 at a spherical sealing surface of the sealing gap D with small inclinations or a cylindrical sealing surface without jamming.
  • the short sealing surfaces of the Kol ⁇ benvorraum 4 are particularly advantageous for minimizing the moving masses and in the maintenance of close Spieltole- tolerances.
  • the second exemplary embodiment of the piezoactuator 1 according to the invention differs in particular from the first exemplary embodiment according to FIG. 1 in that the spring device 6 is designed as a pretensioning element which is connected in series with the return spring 10.
  • the biasing element 6 is biased by the applied fuel pressure P.
  • the biasing member 6 has the property ⁇ shaft, at higher fuel pressures P bias the return spring 10 more than at smaller fuel pressures P. It is thus adjusted or adjusted by the fuel pressure P and the rail pressure itself.
  • the biasing member 6 is in particular formed as a ring, which comprises the Bodenplat ⁇ te 13 of the piezoelectric stack 3. 200602289
  • FIGS. 3 to 5 show various embodiments of the annular biasing member 6.
  • the annular pre ⁇ clamping element 6 has a cross section 14, 15, which is characterized by a main axis Ll and at least one minor axis L2.
  • the annular biasing member has 6 14.
  • the major axis and the minor axis Ll L2 define a substantially diamond-shaped cross-section while the diamond of the cross-section ⁇ .
  • the biasing element 6 according to FIG. 4 has a cross-section which results from a series connection of two diamond-shaped cross-sections 14.
  • the annular biasing element 6 according to FIG. 5 has an elliptical cross-section 15.
  • the main axis Ll and the minor axis L2 define the dimensions of the ellipse.
  • the annular biasing member is arranged in such a way check that the main axis Ll or the minor axis L2 pa rallel ⁇ extending to the closing direction Rl.
  • the main axis Ll according to the embodiment of FIG. 2 is parallel to the closing direction Rl.
  • the annular biasing member 6 has a cavity 16.
  • the cavity 16 is filled in particular with a fluid, a gas, a liquid, a free-flowing material, a polymer and / or an elastomer for adjusting the spring constant of the annular biasing element 6.
  • Fig. 6 shows a schematic flow diagram of a Favor ⁇ th embodiment of the inventive method for manufacturing a piezoelectric actuator 1 for injecting fuel at a predetermined fuel pressure P.
  • the method of the invention with reference to the block ⁇ diagram in Fig. 6 will be explained.
  • the procedural invention ⁇ ren has the following steps: 200602289
  • a nozzle needle 2 for opening and closing a nozzle 18 into which the fuel is injected.
  • the nozzle needle 2 is coupled to a controllable piezo-stack 3, which provides a stroke for actuating the nozzle needle 2 in a closing direction Rl or in an opening direction R2 in response to a control signal.
  • the spring device 6 is arranged such that it provides a force as a function of the fuel pressure P, which at least partially counteracts a force acting on the nozzle needle 2 ⁇ and acting in the closing direction Rl closing force.

Landscapes

  • 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 piezo-actionneur (4), un procédé de fabrication d'un piézo-actionneur et un système d'injection doté d'un tel piézo-actionneur. Selon l'invention, on propose un piézo-actionneur (1) destiné à injecter du carburant sous une pression prédéterminée de carburant, qui présente un pointeau (2) d'ajutage qui ouvre et ferme un ajutage (18) dans lequel le carburant est injecté, un piézo-empilement (3) asservi qui établit en fonction d'un signal de commande une course d'actionnement du pointeau (2) d'ajutage dans une direction de fermeture (R1) ou dans une direction d'ouverture (R2) et un dispositif de ressort (6) qui délivre en fonction de la pression (8) du carburant une force qui s'oppose au moins en partie à une force de fermeture qui agit sur le pointeau (2) d'ajutage dans le sens de sa fermeture (R1).
PCT/EP2007/053346 2006-04-11 2007-04-05 PIEZO-ACTIONNEUR, PROCEDE DE FABRICATION D'UN PIEZO-ACTIONNEUR ET SYSTEME D'INJECTION DOTE d'un tel piézo-actionneur Ceased WO2007116007A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610017034 DE102006017034B4 (de) 2006-04-11 2006-04-11 Piezo-Aktor, Verfahren zum Herstellen eines Piezo-Aktors und Einspritzsystem mit einem solchen
DE102006017034.2 2006-04-11

Publications (1)

Publication Number Publication Date
WO2007116007A1 true WO2007116007A1 (fr) 2007-10-18

Family

ID=38190800

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/053346 Ceased WO2007116007A1 (fr) 2006-04-11 2007-04-05 PIEZO-ACTIONNEUR, PROCEDE DE FABRICATION D'UN PIEZO-ACTIONNEUR ET SYSTEME D'INJECTION DOTE d'un tel piézo-actionneur

Country Status (2)

Country Link
DE (1) DE102006017034B4 (fr)
WO (1) WO2007116007A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100025501A1 (en) * 2008-07-29 2010-02-04 Marco Maragliulo Fuel injector
WO2013098155A1 (fr) * 2011-12-30 2013-07-04 Continental Automotive Gmbh Dispositif à levier et injecteur
EP2944797A1 (fr) * 2014-05-07 2015-11-18 Delphi International Operations Luxembourg S.à r.l. Actionneur de soupape d'un injecteur de carburant
US9500169B2 (en) 2011-12-30 2016-11-22 Continental Automotive Gmbh Lever device and a fuel injection valve

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007056988B4 (de) * 2007-11-27 2012-07-05 Compact Dynamics Gmbh Fluid-Einspritzventil mit Nadellängung
DE102013206429A1 (de) 2013-04-11 2014-10-30 Siemens Aktiengesellschaft Dielektrischer Aktuator
DE102016225743B4 (de) 2016-12-21 2023-07-20 Robert Bosch Gmbh Dämpfungseinrichtung und Gasinjektor mit einer Dämpfungseinrichtung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3533085A1 (de) * 1985-09-17 1987-03-26 Bosch Gmbh Robert Zumessventil zur dosierung von fluessigkeiten oder gasen
DE10145620A1 (de) * 2001-09-15 2003-04-24 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
WO2004109087A1 (fr) * 2003-06-11 2004-12-16 Westport Research Inc. Systeme de soupape et procede pour injecter du carburant sous forme gazeuse
DE10348588A1 (de) * 2003-10-20 2005-07-07 Robert Bosch Gmbh Brennstoffeinspritzventil
US20060033405A1 (en) * 2003-02-03 2006-02-16 Maximilian Kronberger Apparatus for the transmission of a deflection of an actuator
DE102004057246A1 (de) * 2004-11-26 2006-06-01 Robert Bosch Gmbh Kraftstoffeinspritzdüse

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19854508C1 (de) * 1998-11-25 2000-05-11 Siemens Ag Dosiervorrichtung
US6595436B2 (en) * 2001-05-08 2003-07-22 Cummins Engine Company, Inc. Proportional needle control injector

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3533085A1 (de) * 1985-09-17 1987-03-26 Bosch Gmbh Robert Zumessventil zur dosierung von fluessigkeiten oder gasen
DE10145620A1 (de) * 2001-09-15 2003-04-24 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
US20060033405A1 (en) * 2003-02-03 2006-02-16 Maximilian Kronberger Apparatus for the transmission of a deflection of an actuator
WO2004109087A1 (fr) * 2003-06-11 2004-12-16 Westport Research Inc. Systeme de soupape et procede pour injecter du carburant sous forme gazeuse
DE10348588A1 (de) * 2003-10-20 2005-07-07 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004057246A1 (de) * 2004-11-26 2006-06-01 Robert Bosch Gmbh Kraftstoffeinspritzdüse
WO2006056522A1 (fr) * 2004-11-26 2006-06-01 Robert Bosch Gmbh Injecteur de carburant

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100025501A1 (en) * 2008-07-29 2010-02-04 Marco Maragliulo Fuel injector
US8695899B2 (en) * 2008-07-29 2014-04-15 Continental Automotive Gmbh Fuel injector
WO2013098155A1 (fr) * 2011-12-30 2013-07-04 Continental Automotive Gmbh Dispositif à levier et injecteur
US9376993B2 (en) 2011-12-30 2016-06-28 Continental Automotive Gmbh Lever device and a fuel injection valve
US9500169B2 (en) 2011-12-30 2016-11-22 Continental Automotive Gmbh Lever device and a fuel injection valve
EP2944797A1 (fr) * 2014-05-07 2015-11-18 Delphi International Operations Luxembourg S.à r.l. Actionneur de soupape d'un injecteur de carburant

Also Published As

Publication number Publication date
DE102006017034B4 (de) 2008-01-24
DE102006017034A1 (de) 2007-10-18

Similar Documents

Publication Publication Date Title
DE19946838C1 (de) Ventil zum Steuern von Flüssigkeiten
EP1135595B1 (fr) Soupape destinee a commander des liquides
DE19946827C1 (de) Ventil zum Steuern von Flüssigkeiten
WO2007116007A1 (fr) PIEZO-ACTIONNEUR, PROCEDE DE FABRICATION D'UN PIEZO-ACTIONNEUR ET SYSTEME D'INJECTION DOTE d'un tel piézo-actionneur
EP1756415B1 (fr) Injecteur de carburant a multiplication d'actionneur variable
EP1144857A1 (fr) Soupape de distribution a double commutation comprenant un renforcement hydraulique de l'actionneur
WO2001023744A1 (fr) Soupape pour commander le passage de fluides
DE102008043085A1 (de) Kraftstoffinjektor mit druckausgeglichener Bewegungsübertragung
EP1856403B1 (fr) Injecteur de carburant comprenant un element de soupape d'injection a commande directe qui presente un double siege
DE102008032133A1 (de) Kraftstoffeinspritzvorrichtung
DE102009039647A1 (de) Kraftstoffinjektor und Kraftstoff-Einspritzsystem
WO2004074677A1 (fr) Injecteur pour injecter du carburant
EP0783625A1 (fr) Soupape d'injection
EP1171708A1 (fr) Buse d'injection
WO2008049671A1 (fr) Injecteur de carburant
DE10353045A1 (de) Kraftstoffeinspritzventil
EP1682769A1 (fr) Injecteur de carburant dote d'un element de soupape d'injection en plusieurs parties, en commande directe
DE102008042136A1 (de) Kraftstoffinjektor mit mechanischer Übersetzung
EP1399664A1 (fr) Soupape de commande de liquides
DE10307002A1 (de) Kraftstoffeinspritzdüse und Pumpe-Düse-Einheit
EP1276983B1 (fr) Soupape servant a diriger des liquides
WO2018068925A1 (fr) Injecteur à rampe commune piézoélectrique à compensation hydraulique du jeu par déplacement du siège de soupape
DE19939478C1 (de) Ventil zum Steuern von Flüssigkeiten
EP1210511A1 (fr) Dispositif d'injection de carburant pour moteurs a combustion interne
WO2006125689A1 (fr) Injecteur pour installation d'injection de carburant

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07727814

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07727814

Country of ref document: EP

Kind code of ref document: A1