WO2000036293A1 - Dispositif pour transferer le deplacement d'un actionneur sur un element d'ajustement et soupape d'injection equipee d'un tel dispositif - Google Patents

Dispositif pour transferer le deplacement d'un actionneur sur un element d'ajustement et soupape d'injection equipee d'un tel dispositif Download PDF

Info

Publication number
WO2000036293A1
WO2000036293A1 PCT/DE1999/003847 DE9903847W WO0036293A1 WO 2000036293 A1 WO2000036293 A1 WO 2000036293A1 DE 9903847 W DE9903847 W DE 9903847W WO 0036293 A1 WO0036293 A1 WO 0036293A1
Authority
WO
WIPO (PCT)
Prior art keywords
actuator
receiving element
piston
valve
pressure chamber
Prior art date
Application number
PCT/DE1999/003847
Other languages
German (de)
English (en)
Inventor
Wendelin KLÜGL
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP99962111A priority Critical patent/EP1144845B1/fr
Priority to DE59903211T priority patent/DE59903211D1/de
Publication of WO2000036293A1 publication Critical patent/WO2000036293A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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

Definitions

  • the invention relates to a device for transmitting a movement of an actuator according to the preamble of claim 1 and in particular an injection valve with such a device.
  • a device - hereinafter also referred to as a transmission module - is known from DE 197 08 304 AI.
  • accumulator injection systems are increasingly being used, in which very high injection pressures are used.
  • injection systems known under the name “common rail system” fuel is applied under high pressure to injection valves arranged in the cylinders.
  • the injection process into the cylinders is triggered by opening and closing these injection valves, the injection valves being actuated by actuators which operate on the electromagnetic principle and - in order to achieve high switching speeds - the piezoelectric principle.
  • the actuator in the injection valve usually actuates a servo valve that hydraulically controls pressure on a nozzle needle in the injection valve.
  • a servo valve that hydraulically controls pressure on a nozzle needle in the injection valve.
  • a transmission module In order to transfer the deflection of the actuator to a drive ram of the servo valve, a transmission module is known from DE 197 08 304 AI, which is essentially cylindrical and has a pressure chamber which is delimited by a flexible membrane. The drive stamp of the servo valve rests on this flexible membrane. The The pressure chamber of the transmission module is connected via a connecting bore with a throttling effect to a further compensation chamber provided inside the transmission module, the pressure chamber and the compensation chamber being filled with a hydraulic fluid.
  • the pressure chamber and the compensation chamber are designed in such a way that essentially no hydraulic fluid can flow out of the pressure chamber due to the activation times in the range of milliseconds. Since in the transmission module used in DE 197 08 304 AI, the hydraulic fluid is enclosed in the transmission module, there is a risk that due to leakage due to leaks, a pressure drop will occur in the transmission module which affects the functionality of the transmission module and thus of the injection valve. Furthermore, in the known transmission module, the deflection of the actuator is transmitted almost undamped and not delayed to the drive stamp of the servo valve. This in turn has the consequence that the servo valve opens the nozzle needle in the injection valve without braking, which deteriorates the quality of the combustion process.
  • the object of the present invention is to provide a transmission module which is distinguished by a high level of reliability and a long service life and which enables damped transmission of the actuator deflection to an actuator. This object is achieved by the features of patent claim 1. Preferred embodiments are specified in the dependent claims.
  • the transmission module according to the invention is preferably used in an injection valve for internal combustion engines.
  • a transmission module is characterized by a piston element and a receiving element, which engage telescopically and enclose a pressure chamber with the hydraulic medium.
  • the piston element and the receiving element are designed to be axially displaceable with respect to one another, with an actuator deflection from a rest position, in which a connection between the pressure chamber and a compensation chamber is completely open, to a second position, in which the connection between the pressure chamber and the compensation chamber is essentially interrupted.
  • the transmission module according to the invention is characterized by a simple structure, component changes due to manufacturing tolerances, temperature fluctuations and wear effects being reliably compensated for and bridged. Furthermore, the hydraulic medium in the transmission module is not under an increased pressure, which can lead to fluid leakage and thus to an impairment of the functionality of the transmission module.
  • the transmission module according to the invention enables a force-damped and time-delayed transmission of the actuator deflection to an actuator. This reduces the dynamics of the actuator when it is opened, so that e.g. a combustion-technically favorable course can be set when opening an injection valve.
  • cutouts are made in the mutually opposite contact surfaces of the piston element and the receiving element transversely to the direction of flow, which due to increased friction cause the outflow of hydraulic medium from the pressure chamber through the
  • FIG. 1 shows a cross section through an actuator of an injection valve
  • FIG. 2 shows a section along the A-A line in FIG. 1.
  • the cross section shown in FIG. 1 through an actuator of an injection valve essentially consists of a valve housing 1 with a step-like inner bore 11, a piezoelectric actuator 2 and a servo valve 3.
  • the piezoelectric actuator 2 is preferably composed of several stacked piezoelectric actuators Elements constructed, which are arranged in a hollow body 22 formed as a tubular spring.
  • This hollow body 22 is provided with a head plate 23 and a base plate 24, the piezoelectric actuator 2 being prestressed with a defined force of preferably 800 to 1000 N.
  • the piezoelectric actuator 2 is conductively connected to an actuator connection 4 via contact pins protruding from the top plate 23, voltage being applied to the piezoelectric actuator 2 via the actuator connection and thus causing a longitudinal expansion of the piezoelectric actuator.
  • the piezoelectric actuator 2 is further arranged in an actuator housing 25, which is firmly clamped at the upper end of the stepped inner bore 11 in the valve housing 1, the actuator housing 25 being pressed onto a ring-shaped circumferential washer 8 which presses against a shoulder in the inner bore 11 of the Valve housing 1 is supported.
  • the actuator housing 25 is also held by a hollow screw 7, which engages a clamping ring 26 running around the actuator housing 25 and is screwed to the valve housing 1.
  • the base plate 24 of the piezoelectric actuator 2 is provided in the center with a preferably circular attachment 241, on which a disk-shaped membrane 6 is arranged, which extends from the base plate 24 to the inner wall of the valve housing 1.
  • the membrane 6 is held in its outer area between the support plate 8 and the actuator housing 25. The membrane 6 serves to protect the piezoelectric actuator 2 from fuel leakage from the injection valve.
  • the deflection of the piezoelectric actuator 2 generated by electrostriction is transmitted from a transmission module 5 to the servo valve 3.
  • the transmission module 5 essentially consists of a piston element 51, hereinafter also referred to as the drive piston, and a receiving element 52.
  • the drive piston 51 has an essentially T-shaped cross section and its foot 511 is embodied centrally in the base plate 24 Screwed in the inner bore and preferably additionally glued. Furthermore, the drive piston 51 rests with the back of its essentially cylindrical plate 512 on the attachment 241 of the base plate 24 of the actuator 2, the disc-shaped membrane 6 being clamped with its inner region between the attachment 241 and the plate 512.
  • the receiving element 52 of the transmission module 5 also has an essentially T-shaped cross section and is connected in one piece to a valve piston 31 arranged in the inner bore 11 of the valve housing 1.
  • This valve piston 31 is part of the servo valve 3.
  • the servo valve 3 further comprises a valve mushroom 32 on which the valve piston 23 rests, the valve mushroom 32 being pressed in the idle state by a valve spring 33 onto a valve seat 111 in the valve housing 1.
  • the receiving element 52 has in its essentially cylindrical plate 521 a cylindrical recess 522, the inside diameter of which is somewhat larger than the outside diameter of the drive piston plate 512.
  • the drive piston 51 extends with its plate 512 into the recess in the plate 521 of the Receiving element 52, with a distance ⁇ s between an end face 513 of the drive piston 51 and a stop face 523 is provided in the recess 522 of the receiving element 52.
  • the drive piston 51 and the receiving element 52 form a telescopic arrangement which can be pushed into one another by the distance ⁇ s.
  • Recesses are provided in the end face 513 of the plate 512 in the drive piston 51 and in the stop face 523 of the depression 522 in the receiving element 52, which form a pressure chamber 91.
  • the pressure chamber 91 is preferably radially symmetrical about the longitudinal axis of the transmission module 5.
  • a spring element 53 is arranged in the pressure chamber 91, preferably in the form of a spiral spring, which press the drive piston 51 and the receiving element 52 apart in the axial direction.
  • the spring element 53 has the effect that the valve piston 31 always rests without play both on the drive piston 51 connected to the piezoelectric actuator 2 and also on the valve mushroom 32 of the servo valve 3, regardless of longitudinal tolerances, thermal length changes or wear.
  • a compensation chamber 92 is additionally formed in the inner bore 11 between the transmission module 5 and the valve housing 1, delimited by the membrane 6.
  • both the pressure chamber 91 in the transmission module 5 and the compensation chamber 92 around the transmission module 5 are filled with a hydraulic medium.
  • the hydraulic medium is preferably the fuel for the respective engine. It is not necessary for the hydraulic medium in the compensation chamber 92 to be under an increased pressure.
  • the compensation chamber 92 can therefore, if the hydraulic medium is the fuel, e.g. are connected to an essentially unpressurized fuel return line from the injection valve to a fuel tank of the vehicle.
  • the compensation chamber 92 can also be made by .membrane, sealing washers or the like. be completed externally.
  • the actuator for an injection valve shown in FIG. 1 with the transmission module 5 works as follows: In the idle state, ie when the injection valve is closed and the piezoelectric actuator 2 is not activated, it is Pressure chamber 91 over the distance ⁇ s, which is formed between the end face 513 of the plate 511 in the drive piston 51 and the stop surface 523 of the recess 522 in the receiving element 52, and over a gap, which is between the cylindrical outer wall of the plate 512 in the drive piston 51 and of the cylindrical inner wall of the recess 522 of the receiving part 52 is connected to the compensation chamber 92, so that hydraulic medium can be exchanged between the pressure chamber 91 and the compensation chamber 92. Therefore, in the idle state, the pressure in the pressure chamber 91 is the same as in the compensation chamber 92, a pressure-free state preferably being set.
  • the piezoelectric actuator 2 When the piezoelectric actuator 2 is actuated, the longitudinal expansion of the actuator caused by electrostriction causes the base plate 24 to be pushed into the inner bore 11 of the valve housing 1.
  • the drive piston 51 which is firmly connected to the base plate 24, is also deflected, as a result of which the pressure on the hydraulic medium in the pressure chamber 91 increases. This rise in pressure causes the hydraulic medium to be pressed out of the pressure chamber 91 into the compensation chamber 52 via the space existing between the drive piston 51 and the receiving element 52 in the idle state.
  • this gap which is caused by the distance ⁇ s between the end face 513 of the drive piston plate 512 and the stop surface 523 in the recess 522 of the receiving element plate 521 and the gap between the cylindrical outer wall of the drive piston plate 512 and the cylindrical inner wall of the recess 522 of the receiving element plate 521 is not sufficient to reduce the rapid rise in pressure in the pressure chamber 91 caused by the deflection of the drive piston 51 by flowing out hydraulic medium, this pressure is passed on to the valve piston 31 via the receiving element 52 , so that the drive piston 51, the receiving element 52 and the valve piston 31 move down together, whereby the valve mushroom 32 against the action of the valve spring 33 is removed from the valve seat 111 in the inner bore 11 of the valve housing 1. is raised.
  • This opening of the valve mushroom 32 of the servo valve 3 is then used, for example, to open a nozzle needle in the injection valve and thus trigger the injection process.
  • the gap between the plate 512 of the drive piston 51 and the plate 521 of the receiving element 52 is designed in the idle state so that the pressure rise caused by the deflection of the drive piston 51 of the transmission module 5 always presses some hydraulic medium from the pressure chamber 91 into the compensation chamber 92 . This has the effect that the force transmitted from the piezoelectric actuator 2 to the drive piston 51 is damped and transmitted to the receiving element 52 of the transmission module 5 and thus via the valve piston 31 to the valve mushroom 32 of the servo valve 3.
  • valve mushroom 32 is opened with a time delay from the deflection of the transmission module 5, based on the actuator control, since due to the outflow of the hydraulic medium from the pressure chamber 91 at the beginning of the control process, the drive piston 51 changes from its rest position, in which the End face 513 of its plate 512 is spaced from the stop surface 523 in the recess 522 of the receiving element 51 by the distance ⁇ s, advanced deeper into the recess 512, to a maximum extent until the end surface 513 bears against the stop surface 523.
  • This delayed and damped transmission of the deflection of the piezoelectric actuator 2 via the transmission module 5 to the valve mushroom 32 of the servo valve 3 reduces the dynamics when the valve mushroom 32 is opened, which ensures precise control of the injection valve at the high switching speeds desired in the injection valve .
  • the start of the injection process and the speed at which the injection valve opens can be optimally set, which increases the quality of the combustion process.
  • the additional cutouts are designed as concentric grooves 514 transverse to the direction of flow of the hydraulic medium. Similar grooves can be present in the stop surface 523 of the receiving element 52. However, the grooves 514 are preferably formed in the end face 513 of the drive piston 51.
  • the design of the transmission module 5 ensures a simple structure. Only three simply designed parts are necessary.
  • the drive piston 51 which is fixedly attached to the piezoelectric actuator 2 of the injection valve, and as an alternative to the solution shown in FIG. 1, the drive piston 51 can also be formed in one piece with the base plate 24 of the actuator; the receiving element 52, which is formed in one piece with the valve piston 31 of the servo valve 3, but can alternatively also be connected to the valve piston 31, for example via a screw or adhesive connection; and the spring element 53, which is arranged between the drive piston 51 and the receiving element 52.
  • the pressure chamber 91 formed in the transmission module 5 can - as shown in FIG.
  • 1 - consist of depressions both in the drive piston 51 and in the receiving element 52, but alternatively can also be provided in only one of these two parts.
  • the connection between the pressure chamber 91 and the compensation chamber 92 via an intermediate space between the drive piston 51 and the receiving element 52 and the spring element 53 provided between the drive piston 51 and the receiving element 52 ensures that component tolerances and changes occurring due to thermal and wear effects in the Arrangement of the injection valve components are balanced. Due to the escape of hydraulic medium from the pressure chamber 91 into the compensation chamber 92 at the start of the actuation process of the piezoelectric Electric actuator 2 is also provided for a damped power transmission of the actuator deflection to the servo valve 3 and thus for an optimized opening of the injection valve.

Landscapes

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

Abstract

L'invention concerne un module de transfert (5) servant à transférer le déplacement d'un acteur (2) sur un élément d'ajustement, qui comprend un élément de piston (51) et un élément de réception (52), en emboîtement mutuel télescopique. Une chambre de pression (91) est formée entre l'élément de piston (51) et l'élément de réception (52). L'élément de piston (51) et l'élément de réception (52) peuvent être déplacés l'un par rapport à l'autre dans le sens axial, sous l'effet du déplacement de l'acteur (2), pour passer d'une première position de repos où la jonction entre la chambre de pression (91) et la chambre de compensation est entièrement ouverte, dans une seconde position où la jonction entre la chambre de pression (91) et la chambre de compensation (92) est sensiblement interrompue.
PCT/DE1999/003847 1998-12-17 1999-12-01 Dispositif pour transferer le deplacement d'un actionneur sur un element d'ajustement et soupape d'injection equipee d'un tel dispositif WO2000036293A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP99962111A EP1144845B1 (fr) 1998-12-17 1999-12-01 Dispositif pour transferer le deplacement d'un acteur sur un element d'ajustement et soupape d'injection equipee d'un tel dispositif
DE59903211T DE59903211D1 (de) 1998-12-17 1999-12-01 Vorrichtung zum übertragen einer aktorauslenkung auf ein stellglied und einspritzventil mit einer solchen vorrichtung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19858476.8 1998-12-17
DE19858476A DE19858476B4 (de) 1998-12-17 1998-12-17 Vorrichtung zum Übertragen einer Aktorauslenkung auf ein Stellglied und Einspritzventil mit einer solchen Vorrichtung

Publications (1)

Publication Number Publication Date
WO2000036293A1 true WO2000036293A1 (fr) 2000-06-22

Family

ID=7891561

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/003847 WO2000036293A1 (fr) 1998-12-17 1999-12-01 Dispositif pour transferer le deplacement d'un actionneur sur un element d'ajustement et soupape d'injection equipee d'un tel dispositif

Country Status (3)

Country Link
EP (1) EP1144845B1 (fr)
DE (2) DE19858476B4 (fr)
WO (1) WO2000036293A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1325224B1 (fr) * 2000-10-11 2006-05-03 Siemens VDO Automotive Corporation Soupape sensible a la pression pour compensateur d'actionneur transistorise
DE60104906T2 (de) 2000-11-13 2005-01-05 Siemens Vdo Automotive Corporation, Auburn Hills Magnetohydraulische ausgleichvorrichtung für kraftstoff-einspritzdüse
DE10118563A1 (de) 2001-04-14 2002-11-07 Bosch Gmbh Robert Piezoelektrisches Aktormodul
US6749127B2 (en) 2002-02-11 2004-06-15 Siemens Vdo Automotive Corporation Method of filling fluid in a thermal compensator
DE10344061A1 (de) * 2003-09-23 2005-04-28 Siemens Ag Einspritzventil mit einem hydraulischen Ausgleichselement
DE102004046095B4 (de) * 2004-09-23 2018-02-15 Robert Bosch Gmbh Brennstoffeinspritzventil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509858A (en) * 1968-05-20 1970-05-05 Gen Motors Corp Overhead cam valve lifter
EP0030781A1 (fr) * 1979-12-05 1981-06-24 Eaton Corporation Poussoir hydraulique pour vanne à entrainement direct
DE3742241A1 (de) * 1987-02-14 1988-08-25 Daimler Benz Ag Piezosteuerventil zur steuerung der kraftstoffeinspritzung ueber ein einspritzventil bei brennkraftmaschinen
DE19627982A1 (de) * 1996-07-11 1998-01-15 Schaeffler Waelzlager Kg Hydraulisches Spielausgleichselement
DE19708304A1 (de) 1997-02-28 1998-09-10 Siemens Ag Vorrichtung zur Übertragung einer Bewegung und Einspritzventil mit einer Vorrichtung zur Übertragung einer Bewegung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4913106A (en) * 1989-08-28 1990-04-03 Rhoads Jack L Variable duration valve lifter improvements
DE19500706C2 (de) * 1995-01-12 2003-09-25 Bosch Gmbh Robert Zumeßventil zur Dosierung von Flüssigkeiten oder Gasen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509858A (en) * 1968-05-20 1970-05-05 Gen Motors Corp Overhead cam valve lifter
EP0030781A1 (fr) * 1979-12-05 1981-06-24 Eaton Corporation Poussoir hydraulique pour vanne à entrainement direct
DE3742241A1 (de) * 1987-02-14 1988-08-25 Daimler Benz Ag Piezosteuerventil zur steuerung der kraftstoffeinspritzung ueber ein einspritzventil bei brennkraftmaschinen
DE19627982A1 (de) * 1996-07-11 1998-01-15 Schaeffler Waelzlager Kg Hydraulisches Spielausgleichselement
DE19708304A1 (de) 1997-02-28 1998-09-10 Siemens Ag Vorrichtung zur Übertragung einer Bewegung und Einspritzventil mit einer Vorrichtung zur Übertragung einer Bewegung

Also Published As

Publication number Publication date
DE19858476B4 (de) 2006-07-27
EP1144845A1 (fr) 2001-10-17
DE59903211D1 (de) 2002-11-28
DE19858476A1 (de) 2000-06-29
EP1144845B1 (fr) 2002-10-23

Similar Documents

Publication Publication Date Title
DE19500706C2 (de) Zumeßventil zur Dosierung von Flüssigkeiten oder Gasen
EP1434937B1 (fr) Soupape d'injection de carburant
EP0828936B1 (fr) Soupape d'injection
EP1117920B1 (fr) Injecteur a rampe commune
EP1111230B1 (fr) Dispositif hydraulique pour transmettre le mouvement d'un actuateur
DE19821768C2 (de) Dosiervorrichtung und Dosierverfahren
EP0828935B1 (fr) Soupape d'injection
EP1115970A1 (fr) Soupape d'injection de carburant
WO1998040623A1 (fr) Soupape pour reguler des fluides
DE19946840A1 (de) Ventil zum Steuern von Flüssigkeiten
DE102009039647A1 (de) Kraftstoffinjektor und Kraftstoff-Einspritzsystem
DE4412948C2 (de) Elektrohydraulische Absperrvorrichtung
EP1171708B1 (fr) Buse d'injection
EP1144845B1 (fr) Dispositif pour transferer le deplacement d'un acteur sur un element d'ajustement et soupape d'injection equipee d'un tel dispositif
EP2494182B1 (fr) Dispositif d'injection de carburant
WO2001038712A2 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
DE19946732B4 (de) Vorrichtung zum Übertragen einer Auslenkung eines Aktors auf ein Stellglied und Kraftstoffinjektor mit einer solchen Vorrichtung
DE102005054927A1 (de) Kraftstoffinjektor mit verbesserter Einspritzmengenstabilität
WO2000034645A1 (fr) Element de transfert d'un mouvement et soupape d'injection dote d'un tel element
EP1658427A1 (fr) Soupape d'injection de carburant pour des moteurs a combustion interne
DE102006055555A1 (de) Kraftstoffinjektor mit Piezoaktor
DE10032924A1 (de) Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE10333693B3 (de) Kraftstoffeinspritzvorrichtung
DE10003252A1 (de) Einspritzdüse
WO2001053689A1 (fr) Soupape de regulation de liquides

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 1999962111

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1999962111

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1999962111

Country of ref document: EP