EP2948672A1 - Unité modulaire d'actionnement pour une soupape d'injection - Google Patents

Unité modulaire d'actionnement pour une soupape d'injection

Info

Publication number
EP2948672A1
EP2948672A1 EP14721245.0A EP14721245A EP2948672A1 EP 2948672 A1 EP2948672 A1 EP 2948672A1 EP 14721245 A EP14721245 A EP 14721245A EP 2948672 A1 EP2948672 A1 EP 2948672A1
Authority
EP
European Patent Office
Prior art keywords
component
actuator unit
electrodes
sensor
electrode
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
EP14721245.0A
Other languages
German (de)
English (en)
Inventor
Claus Zumstrull
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2948672A1 publication Critical patent/EP2948672A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
    • F16K31/007—Piezoelectric stacks
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/005—Fuel-injectors combined or associated with other devices the devices being sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
    • F16K31/007—Piezoelectric stacks
    • F16K31/008—Piezoelectric stacks for sliding valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
    • 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
    • F02M2200/24—Fuel-injection apparatus with sensors
    • F02M2200/244—Force sensors

Definitions

  • Modular actuator for an injection valve the invention relates to a modular actuator for an injection valve of an internal combustion engine of a driving ⁇ zeugs. Such an actuator unit is used for injecting fuels into a combustion chamber of a cylinder of the internal combustion engine.
  • An actuator for an injection valve of a Burn ⁇ voltage combustion engine of a vehicle typically includes a formed as a stacking device having a plurality of electrode layers and a plurality of responsive to applying an electric field layers of material, each material layer between two disposed electrode layers ⁇ the.
  • a stack Such a component of überei ⁇ Nander and alternately to each other stacked layers of material layer and electrode layer is generally referred to as a stack.
  • the nowadays most well-known electronic component of this kind is generally referred to as a piezoelectric actuator stack, which is used as an actuating element in injection valves of the various ⁇ most engine types for motor vehicles.
  • the material layers are ceramic layers in this piezoelectric actuator.
  • such a stack viewed in plan view, has a rectangular or square cross-section.
  • the stack is typically electrically contacted at two opposite circumferential sides.
  • the electrode layers are geometrically designed, for example, such that only every second electrode layer extends laterally to one of the two circumferential sides, while the respective other electrode layers do not extend to this one circumferential side. The same applies analogously to the other circumferential side of the stack.
  • the electrical contacting of the electrode layers takes place via two outer electrodes, which are generally electrically connected to respective electrode layers on at least one peripheral side of the component and typically on two opposite circumferential sides.
  • the finished component is surrounded by a Bourdon tube, which is typically made of a metal.
  • the tube spring serves to bias the component stack during operation of the actuator unit and thereby prevent damage to the ceramic. Furthermore, the tube spring serves to provide a restoring force for the deflected component stack.
  • a layer e.g. made of silicone, which covers at least the outer electrodes.
  • sensors can be used, which directly detect the opening and closing time of a actuated by the actuator needle of the injection valve.
  • a sensor may be, for example, a piezoelectric force sensor, which is coupled in the frictional connection with the piezoelectric actuator.
  • recoverable Messge ⁇ accuracy is not high enough for precise control.
  • the invention provides an actuator unit for an injection valve of an internal combustion engine of a vehicle.
  • the actuator unit comprises a designed as a stack elekt ⁇ ronic component.
  • the component has a plurality of electrode layers and a plurality of material layers reacting upon application of an electric field, wherein the material layers and electrode layers are each stacked in an alternating manner.
  • the component further comprises two outer electrodes, with which the electrode layers are alternately electrically connected to at least one circumferential side of the component.
  • the actuator unit comprises a piezoelectric sensor which is non-positively coupled with the component in the stroke direction of the component.
  • the senor detects a force generated by the construction ⁇ element, which is detected as a voltage or charge between two arranged on opposite end faces of a sensor body electrodes.
  • the electrodes are applied from an electrically conductive material directly to at least the end faces of the sensor body.
  • the invention is based on the finding that the coupling point between the component (piezoactuator) and the sensor with regard to its rigidity and force transmission is of great importance for high measuring accuracy.
  • the electrodes are formed by, on the side and end faces applied, metal foils, which are connected via an adhesive to the side and end faces of the sensor body. Since the metal foils can not be applied completely flat to the sensor body and the adhesive has elastic properties even after curing, the result is an overall elastic coupling region. which distorts the measurement of the force generated by the component or does not reflect the time course correctly.
  • the end faces represent opposing main sides of the sensor body, which are arranged parallel to each other.
  • the main sides of the sensor body are preferably arranged in the actuator unit parallel to the material layers or the electrode layers of the component (piezoelectric actuator).
  • the electrodes applied directly to the sensor body can have a different thickness. You can also have the same thickness.
  • the geometry of the two electrodes is freely selectable.
  • the geometry may e.g. be determined by a mask or the like.
  • the proposed embodiment allows a separate Fer tion of sensor and piezoelectric actuator, which can be joined together at a later date.
  • the material used for the electrodes may be metals such as silver, copper, gold, palladium or alloys thereof. Other conductive materials are possible.
  • the higher rigidity of the coupling region is further favored in that the direct application of the electrodes enables a lower electrode thickness. While in a conventional actuator unit ⁇ forth the thickness of the metal foil between n
  • the thickness of the electrodes can be reduced to less than 20 ⁇ m, in particular less than 10 ⁇ m, according to one embodiment.
  • a respective end face is limited by side edges, which is arranged on the respective end surface electrode includes at least one of the parent to ⁇ side edges a distance.
  • At least one contacting section of a respective electrode is arranged on at least one side surface of the sensor body, wherein the at least one contacting section and the associated electrode are generated over a side edge in one step.
  • the contacting portions on the side surface are used for the electrical contacting of the electrodes.
  • the electrodes are formed by metal foils, they can not be bent over to the side surface due to the small thickness of the sensor body (usually less than 0.5 mm). Instead, the contacting section of the electrode facing the stack (so-called internal electrode) in the direction of the piezoelectric actuator and the electrode facing away from the stack (so-called external electrode) must be bent in the direction of an insulator. In particular for the inner ⁇ electrode suitable isolation measures must be taken for this, which is not necessary in the inventive procedure.
  • the distance between the electrode and this side edge is at least on a Bei ⁇ tenkante opposite the contacting section intended. This avoids isolation problems with respect to the outer electrodes of the piezoelectric actuator without separate further measures.
  • the sensor body is a monolithic plate made of a piezoceramic.
  • the piezoceramic of the sensor may be formed of a different material than the material layers of the component.
  • the senor is non-positively connected to the component via an insulating layer.
  • the sensor can be supported on the side facing away from the piezoelectric actuator side via an insulating layer on a housing of the actuator unit.
  • FIG. 1 shows a schematic representation of a device according to the invention
  • FIG. 2 shows a first exemplary embodiment of a sensor designed according to the invention for the actuator unit according to FIG. 1, FIG.
  • FIG. 3 shows a second exemplary embodiment of a sensor designed according to the invention for the actuator unit according to FIG. 1, FIG.
  • FIG. 4 shows a third exemplary embodiment of a sensor designed according to the invention for the actuator unit according to FIG. 1
  • FIG. 5 shows a fourth exemplary embodiment of a sensor configured according to the invention for the actuator unit according to FIG. 1.
  • 1 shows a schematic illustration of an actuator unit according to the invention for an injection valve of an internal combustion engine of a vehicle.
  • This comprises an electronic component 10 designed as a stack.
  • Such a stack 16 as viewed in plan view, usually has a rectangular or square cross section.
  • the component stack 16 comprises (not visible in FIG. 1) a plurality of electrode layers or a plurality of material layers responsive to application of an electric field, wherein each of the material layers is arranged between two of the electrode layers.
  • the electrical contacting takes place via two outer electrodes 11, 12, which are electrically connected to respective electrode layers via schematically represented conductors 13, 14.
  • the outer electrodes 11, 12 are connected to drive the component stack 16 with a control unit 17 (ECU Electronic Control Unit).
  • the outer electrodes 11, 12 are arranged at least on one peripheral side, but preferably on two different circumferential sides of the stack, which are particularly preferably opposite.
  • Piezo actuator can be achieved.
  • an insulating layer for example of silicone, is usually applied to the peripheral sides of the component stack (not shown).
  • the Bourdon tube is typically ge ⁇ made of a metal.
  • the sensor 20 can be supported, for example, on a housing component, not shown, of the injection valve.
  • the sensor 20 comprises a sensor body 21, which is formed by a monolithic plate made of a piezoceramic.
  • the sensor 20 detects a force F generated by the component stack 16, which can be detected as a voltage between two electrodes 24, 25 arranged on opposite side surfaces 22, 23 of the sensor body 21.
  • the electrodes 24, 25 are connected to a voltage measuring device 30, which detects the voltage generated by the piezoceramic and converts it into the force correlating thereto.
  • Electrodes 24, 25 To the electrodes 24, 25 is a respective insulation layer 31, applied 32 to prevent an electrical short of the so-called. External electrode 24 to the housing of the injection valve or the so-called. Inner electrode 25 to the device stack 16 or its outer ⁇ electrodes 11,12. For this reason, the contacting of the electrodes 24, 25 does not take place in the region of the end faces 22, 23, but in the region of a side face 26a, 26b, 26c, 26d of the sensor body via contacting sections 27a, 27b, 27c, 27d of the electrodes 24, 25.
  • the thickness of the sensor body 21 is about 0.5 mm.
  • the lengths of the side edges are for example between 2 and 3 mm, although other dimensions are possible.
  • the side lengths of the sensor body are chosen equal to the side lengths of the actuator.
  • the sensor body 21 can optionally have a square, a rectangular or another cross-section in plan view.
  • the electrodes 24, 25 are applied from an electrically conductive material directly at least on the end faces of the sensor body. Direct means that the electrode material is applied without adhesive or other adhesive material directly by the way the generation of the contact on the sensor body.
  • the electrically conductive material for example, silver, gold or copper, palladium or alloys thereof may be used.
  • These materials can be applied directly to the sensor body 21 by plasma deposition, vapor deposition or sputtering. Together with the electrodes 24, 25 applied to a respective end face 22, 23, one or more contacting sections 27a, 27b, 27c, 27d can also be applied to one or more side faces 26a, 26b, 26c, 26d of the sensor body 21, for example by rotation of the Sensor body 21 during manufacture. By masking during the manufacturing process, any desired contours of the electrodes 24, 25 and / or the contacting sections 27a, 27b, 27c, 27d can be generated.
  • the mentioned methods for direct application of the material of the electrodes 24, 25 allow compared to metal foils very thin electrodes of about 10 to 20 ym thickness. At the same time, a very even surface can be achieved, so that a rigid connection to the component stack is possible.
  • FIGS. 2 to 5 each show, in a perspective view, various embodiments of a sensor 20 which is used in an actuator unit according to FIG.
  • the embodiments differ in the shape of the electrodes and the arrangement or number of contacting portions. Due to the perspective view, only the outer electrode 24 on the end face 22 and the side edges 26c and 26d of the sensor body with the contacting section (s) 27c, 27d are visible.
  • the electrode 24 extends over the entire surface of the end face 22. This has the consequence that the electrode up to the four side edges 22a, 22b, 22c, 22d of the end face 22nd protrudes.
  • a contacting portion 27c is disposed on the side surface 26c.
  • the electrode 25 is at a distance from the side edge 23c, wherein the contacting portion is disposed on the non-visible side surface 26a, ie opposite the contacting portion 27c.
  • This refinement likewise makes it possible to dispense with otherwise customary isolation measures.
  • the electrode 24 to the side edges 22a and 22b at a distance 28a, 28b. Otherwise, the electrode projects up to the side edges 22c, 22d.
  • the contacting portion 27c is again disposed on the side surface 26c.
  • a contacting portion 27d is provided on the side surface 26d.
  • the electrode 25 is at a distance from the side edges 23c, 23d, wherein the Kontak- t istsabête on the non-visible end faces 26a and 26b, that are arranged opposite the contacting sections 27c, 27d.
  • This refinement makes it possible to dispense with otherwise customary insulation measures and a lower resistance contacting of the electrodes 24, 25.
  • the contact portions and the associated electrode are produced in one step and form a unit.
  • the or Darge ⁇ presented contacting sections take only an example of a part of the surface of the respective side edge.
  • the contacting portion 27c could also be up to the side edge 23c of Face 23 protrude.
  • the contacting portion 27c could also occupy a greater width. It could also extend over the entire side surface 26c. The same applies to the contacting section 27d in FIG. 5 or all contacting sections provided on the sensor body 21.
  • the elasticity of the coupling region between the sensor and the component stack can be reduced or even eliminated almost completely.
  • the absence of adhesive has the further advantage that no contamination by solvent adhesives can occur.
  • the proposed configuration allows separate Ferti ⁇ supply of the sensor and the piezoelectric actuator, which can be joined at a later date.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une unité d'actionnement pour une soupape d'injection d'un moteur à combustion interne d'un véhicule. L'unité d'actionnement comprend un composant (10) électronique réalisé sous la forme d'un empilement. Le composant (10) comporte une pluralité de couches d'électrodes et une pluralité de couches de matériau réagissant à l'application d'un champ électrique. Des couches de matériau et des couches d'électrodes sont disposées en alternance. Le composant (10) comprend en outre deux électrodes extérieures (11, 12), qui sont raccordées électriquement à au moins un côté périphérique du composant (10) comprenant des couches d'électrodes périphériques. L'unité d'actionnement comprend en outre un capteur piézoélectrique (20), qui est couplé à force au composant (10) dans la direction de levage du composant (10). Lorsque le composant (10) fonctionne, le capteur (20) détecte une force (F) produite par le composant, qui peut être détectée en tant que tension ou charge entre deux électrodes (24, 25) disposées sur des faces frontales (22, 23) se faisant face d'un corps de capteur (21). Les électrodes (24, 25) fabriquées à partir d'un matériau électroconducteur sont directement placées au moins sur les faces frontales (22, 23) du corps de capteur (21).
EP14721245.0A 2013-04-17 2014-04-16 Unité modulaire d'actionnement pour une soupape d'injection Ceased EP2948672A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013206933.2A DE102013206933A1 (de) 2013-04-17 2013-04-17 Modulare Aktuatoreinheit für ein Einspritzventil
PCT/EP2014/057802 WO2014170399A1 (fr) 2013-04-17 2014-04-16 Unité modulaire d'actionnement pour une soupape d'injection

Publications (1)

Publication Number Publication Date
EP2948672A1 true EP2948672A1 (fr) 2015-12-02

Family

ID=50639442

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14721245.0A Ceased EP2948672A1 (fr) 2013-04-17 2014-04-16 Unité modulaire d'actionnement pour une soupape d'injection

Country Status (4)

Country Link
US (1) US9709186B2 (fr)
EP (1) EP2948672A1 (fr)
DE (1) DE102013206933A1 (fr)
WO (1) WO2014170399A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015217193A1 (de) * 2015-09-09 2017-03-09 Continental Automotive Gmbh Erfassungsverfahren zum Erfassen einer Spaltgröße eines Spaltes zwischen einer Injektorventilbaugruppe und einem Piezostapel sowie Ansteuerungsverfahren zum Ansteuern einer Aktoreinheit in einem Piezostapel.
DE102016204888A1 (de) * 2016-03-23 2017-03-16 Continental Automotive Gmbh Piezoelektrische Aktuatoreinheit und Herstellungsverfahren zum Herstellen einer Aktuatoreinheit
JP2020089037A (ja) * 2018-11-22 2020-06-04 株式会社堀場エステック ピエゾアクチュエータ、流体制御バルブ、及び、流体制御装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5281888A (en) * 1992-03-17 1994-01-25 Ngk Insulators, Ltd. Piezoelectric/electrostrictive element having auxiliary electrode disposed between piezoelectric/electrostrictive layer and substrate
DE102011078905A1 (de) * 2011-07-11 2013-01-17 Robert Bosch Gmbh Sensoranordnung zur Kraft- oder Druckmessung sowie Kraftstoffinjektor mit einer solchen Sensoranordnung

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3489931A (en) * 1968-08-30 1970-01-13 Bourns Inc Monolithic electrical transformer
JP3039971B2 (ja) * 1989-09-19 2000-05-08 株式会社日立製作所 接合型圧電装置及び製造方法並びに接合型圧電素子
DE19960971A1 (de) 1999-12-17 2001-03-08 Bosch Gmbh Robert Piezoaktor
JP3706903B2 (ja) * 2000-08-10 2005-10-19 独立行政法人産業技術総合研究所 フレキシブル高感度セラミックスセンサー
DE10127932A1 (de) * 2001-06-08 2002-12-19 Bosch Gmbh Robert Ventil zum Steuern von Fluiden sowie Verfahren zur Bestimmung von Drücken
DE10345730A1 (de) * 2003-10-01 2005-04-21 Bosch Gmbh Robert Piezoaktor
FR2907544B1 (fr) * 2006-10-19 2009-02-13 Renault Sas Systeme d'estimation du debit d'un injecteur de moteur a combustion interne
WO2009041476A1 (fr) * 2007-09-27 2009-04-02 Kyocera Corporation Elément piézoélectrique multicouche, injecteur équipé de cet élément et système d'injection de carburant
DE102008007205A1 (de) * 2008-02-01 2009-08-06 Robert Bosch Gmbh Piezoaktormodul mit mehr als zwei Anschlusspins für Piezoinjektioren mit integriertem Piezo-Sensor
JP2010103315A (ja) * 2008-10-23 2010-05-06 Denso Corp 圧電アクチュエータおよびそれを用いた燃料噴射弁
DE102009002311A1 (de) * 2009-04-09 2010-10-14 Robert Bosch Gmbh Piezoelektrischer Aktor und Brennstoffeinspritzventil
US9016127B2 (en) * 2009-10-07 2015-04-28 Nec Tokin Corporation Piezoelectric acceleration sensor
DE102009047611A1 (de) 2009-12-08 2011-06-09 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung mit Nadelpositionsbestimmung
DE102012204251B4 (de) * 2012-03-19 2013-12-12 Continental Automotive Gmbh Verfahren zum Betreiben eines Kraftstoffeinspritzsystems und Kraftstoffeinspritzsystem mit Einspritzventilen mit Piezo-Direktantrieb

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5281888A (en) * 1992-03-17 1994-01-25 Ngk Insulators, Ltd. Piezoelectric/electrostrictive element having auxiliary electrode disposed between piezoelectric/electrostrictive layer and substrate
DE102011078905A1 (de) * 2011-07-11 2013-01-17 Robert Bosch Gmbh Sensoranordnung zur Kraft- oder Druckmessung sowie Kraftstoffinjektor mit einer solchen Sensoranordnung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2014170399A1 *

Also Published As

Publication number Publication date
US20160053910A1 (en) 2016-02-25
DE102013206933A1 (de) 2014-10-23
WO2014170399A1 (fr) 2014-10-23
US9709186B2 (en) 2017-07-18

Similar Documents

Publication Publication Date Title
DE102006003070B3 (de) Verfahren zum elektrischen Kontakieren eines elektronischen Bauelements
WO1998047187A1 (fr) Actionneur piezoelectrique a nouveau mode de contact et son procede de fabrication
WO2014170399A1 (fr) Unité modulaire d'actionnement pour une soupape d'injection
EP2543085B1 (fr) Composant piézoélectrique
DE102010049311B4 (de) Verfahren zur Herstellung eines piezoelektrischen Aktorbauelements
EP1690303B1 (fr) Piezo-actionneur
EP2865027B1 (fr) Procédé de fabrication d'un composant électronique sous la forme d'un empilage
EP1587152B1 (fr) Dispositif avec actionneur piézoélectrique
EP2642544B1 (fr) Agencement à partir d'un piézoactionneur et d'une plaquette flexible
DE102011078905A1 (de) Sensoranordnung zur Kraft- oder Druckmessung sowie Kraftstoffinjektor mit einer solchen Sensoranordnung
DE102009017434A1 (de) Elektronisches Bauelement und Verfahren zum elektrischen Kontaktieren eines elektronischen Bauelements als Stapel
EP2417346B1 (fr) Actionneur piézoélectrique et soupape d'injection de combustible
DE102005013912A1 (de) Piezoaktor
EP3058600A1 (fr) Élément multicouches et procédé de fabrication d'un élément multicouches
EP2054951B1 (fr) Composant piézoélectrique
EP2798679B1 (fr) Pile piézo-électrique avec passivation et procédé de passivation d'une pile piézo-électrique
DE19946837A1 (de) Piezoaktor
EP2396535B1 (fr) Actionneur piezoelectrique, procede de production de l'actionneur et injecteur
DE112010002244T5 (de) Piezoelektrische gestapelte Stellanordnung
DE102017108384A1 (de) Vielschichtbauelement und Verfahren zur Herstellung eines Vielschichtbauelements
WO2017054950A1 (fr) Composant électrocéramique, en particulier actionneur piézoélectrique multicouche
DE102011078915A1 (de) Sensoranordnung zur Kraft- oder Druckmessung sowie Kraftstoffinjektor mit einer solchen Sensoranordnung
DE102012110556A1 (de) Vielschichtbauelement und Verfahren zu dessen Herstellung
DE102019201650A1 (de) Verfahren zur Herstellung eines piezoelektrischen Stapelaktors und piezoelektrischer Stapelaktor, vorzugsweise hergestellt nach dem Verfahren
WO2011020844A1 (fr) Unité d'actionnement optimisée pour soupape d'injection

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20150611

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20161006

REG Reference to a national code

Ref country code: DE

Ref legal event code: R003

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20170324