WO2007033859A1 - Ensemble comportant un actionneur piezoelectrique - Google Patents

Ensemble comportant un actionneur piezoelectrique Download PDF

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Publication number
WO2007033859A1
WO2007033859A1 PCT/EP2006/065058 EP2006065058W WO2007033859A1 WO 2007033859 A1 WO2007033859 A1 WO 2007033859A1 EP 2006065058 W EP2006065058 W EP 2006065058W WO 2007033859 A1 WO2007033859 A1 WO 2007033859A1
Authority
WO
WIPO (PCT)
Prior art keywords
holding body
actuator
contact elements
piezoelectric
arrangement according
Prior art date
Application number
PCT/EP2006/065058
Other languages
German (de)
English (en)
Inventor
Rudolf Heinz
Dieter Kienzler
Udo Schaich
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
Priority to EP06792691A priority Critical patent/EP1929553A1/fr
Publication of WO2007033859A1 publication Critical patent/WO2007033859A1/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
    • 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
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/87—Electrodes or interconnections, e.g. leads or terminals
    • H10N30/875—Further connection or lead arrangements, e.g. flexible wiring boards, terminal pins
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/88—Mounts; Supports; Enclosures; Casings
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
    • 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
    • F02M2200/8076—Fuel injection apparatus manufacture, repair or assembly involving threaded members
    • 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
    • F02M2200/903—Glass
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure

Definitions

  • the invention relates to an arrangement with a piezoelectric actuator, for example as a piezoelectric injector for actuating a mechanical component such as a valve or the like, with an electrical connection for the control of the piezoelectric element according to the generic features of the main claim.
  • a piezoelectric actuator for example as a piezoelectric injector for actuating a mechanical component such as a valve or the like, with an electrical connection for the control of the piezoelectric element according to the generic features of the main claim.
  • a piezoelectric element can be used so that by utilizing the so-called piezoelectric effect, a control of the needle stroke of a valve or the like can be made.
  • the piezoelectric element is constructed of a material having a suitable crystal structure such that when an external electrical voltage is applied, a mechanical reaction of the piezoelectric element takes place which, depending on the crystal structure and the contact areas of the electrical voltage, represents a pressure or tension in a predeterminable direction.
  • Such piezoelectric actuators are suitable, for example, for applications in which lifting movements take place under high operating forces and high clock frequencies.
  • such a piezoelectric actuator is known from DE 100 26 005 A1, which can be used to control the nozzle needle in injectors for injecting fuel into the combustion chamber of an internal combustion engine.
  • a piezoelectric element constructed as a stack of several electrically coupled together piezoceramic layers, which is held under bias between two stops. Each piezoceramic layer is enclosed as a piezoelectric layer between two internal electrodes via which an electrical voltage can be applied from the outside. Because of this electrical voltage, the piezoceramic layers then each carry out small strokes in the direction of the potential gradient, which add up to the total stroke of the piezoelectric actuator. This total stroke is variable by the amount of voltage applied and can be transferred to a mechanical actuator.
  • a piezoelectric actuator is also described in EP 1 174 615 A3, in which a piezoelectric element is present as an actuator for the direct needle stroke control of an injection injector for an internal combustion engine. Between the piezo element as an actuator and the needle sits only a coupler with a hydraulic ratio to the expansion compensation. With an activation of the piezoelectric element in this case the held under bias to the closure of the injection nozzle needle is moved away from the nozzle opening, as the needle directly translated follows the movement of the actuator.
  • the piezoelectric element is applied via an actuator foot to a sealing seat in the interior of the piezoactuator, wherein the piezoelement is additionally pressed by a spring in order to effect a good sealing seat in addition to the pressing force of the liquid held under high pressure.
  • the possibly insufficient pressure forces on the sealing seat represent a critical quantity here, whereby particular attention must be paid to a precise guidance of the components involved in the sealing seat.
  • the invention is based on an arrangement described above with a piezoelectric actuator having a multi-layer structure of piezoelectric layers in a piezoelectric element, which are held in a holding body, wherein the piezoelectric element is a mutual contacting of internal electrodes with contact elements.
  • the actuator foot can be pressed by means of a Switzerlandverschraubung to a spherical sealing seat on the holding body in an advantageous manner.
  • the invention Zaverschraubung is effected by an extension of the Aktorfußes is guided in the direction of actuation by the holding body through a screw which has a screwed onto a thread of Aktorfußverinrung mother and by rotation of the mother a tensile force and thus an additional sealing force arises on the crowned sealing seat.
  • the actuator module is pressed with the piezoelectric element against an example crowned sealing seat to seal, for example, when using the piezoelectric actuator as injection injector, the entire module in terms of trapped liquid under high pressure.
  • the pressure of the liquid supports the sealing effect (self-reinforcing principle), but can be improved with the invention Glasverschraubung the sealing effect.
  • a support disk can still be arranged between the nut and the bearing surface of the nut on the holding body, which is held non-rotatably on the holding body and also on the driver's foot extension by means of pin or pin-type connections both to the bearing surface on the holding body and to the actuator foot extension.
  • the mother is thus supported on the preferably spherical support disk and by the pins or pins, the support disk can be initially secured on one or both sides against rotation on the holding body.
  • the helical Aktorfußverinrung does not rotate with the mother, it is by another pin or pin-like connections, for example, with a one- or two-sided nose on the support disk, which engages in a one- or two-sided groove on the Aktohrfußverinrung, twisting prevents the Aktorfußes.
  • the actuator foot on the sealing seat has a spherical or conical contour for producing a so-called.
  • Ball-cone seal so that with the Switzerlandverschraubung a correct orientation of the Aktorfußes in the pulling direction is effected.
  • the piezoelectric actuator on a mechanical coupler for controlling, for example, a nozzle needle of the injection injector can be aligned so that the coupler does not jam or the coupler is not tilted and leaking frontally.
  • the electrical lines which are guided through the actuator foot to the contact elements preferably guided by a Glaseinschmelzung to the outside of the contact elements of the piezoelectric element.
  • the electrical lines which are guided through the actuator base to the contact elements preferably guided by a Glaseinschmelzung inside lying in the inner recesses of the piezoelectric element contact elements.
  • the actuator foot in the region of the connection to the active layers of the piezoelectric element may be divided into two, wherein a connection of the electrical lines via a respective connector during assembly of the two parts of the actuator base is effected.
  • the piezoelectric actuator according to the invention has the following advantages:
  • FIG. 1 shows a longitudinal section through a conventional arrangement of a single-stage piezoelectric injector with a piezoelectric actuator for controlling a nozzle needle in fuel injection systems to explain the basic structure
  • 2 shows a partial section through a holding body for the piezoelectric actuator according to the invention with a Switzerlandverschraubung on the actuator base and an external electrical contacting of the piezoelectric element
  • 2 shows a partial section through a holding body for the piezoelectric actuator according to the invention with a Switzerlandverschraubung on the actuator base and an internal electrical contacting of the piezoelectric element
  • a piezo injector or injection injector due to the proposed application and can be used for example for Nadelhub horrung in the injection system for fuel in an internal combustion engine.
  • a holding body 2 In the upper part of a holding body 2 is present, which can be adjusted in its geometric dimensions substantially to the specific site. It can be seen a plug part 3, by which the electrical voltage for driving the piezoelectric element can be connected with a plug also adapted specifically to the application.
  • the leadership of the electrical line and a possible supply of the fuel to be controlled with the piezoelectric injector 1 in the holding body 2 is not visible in this case and not essential for the function of the invention.
  • a piezoactuator with a piezoelectric element 5 is arranged, which acts on a nozzle needle 7 when actuated via a mechanical arrangement located vertically below with a coupler 6 such that a release of a nozzle opening 8 takes place can.
  • a guided in the interior of the piezoelectric actuator 1 through the interior 4 fuel can thus be injected into the combustion chamber of an internal combustion engine, not shown here.
  • the piezoelectric element 5 is according to the figure 1 via an actuator base 9 at the top of a spherical sealing seat in the interior 4, wherein the piezoelectric element 5 for Effect of a good sealing seat with a spring 10 is pressed.
  • a high-pressure seal to an electrical connection space 11 is necessary here, through which two electrical lines 12 and 13 are led to the piezoelectric element 5.
  • the actuator foot 9 in deviation from the previously described example, rests on the holding body 2 via a so-called ball-and-cone seal 20 and an actuator foot extension 21 is guided vertically upwards as a pull-type screw connection.
  • the leadership of the lines 12 and 13 is made here in separate bore; However, they can also be performed in a single bore.
  • the upper end of the Aktorfußverinrung 21 has a thread 24 on which a nut 25 can be screwed, so that hereby the sealing seat 20 can be provided with a contact pressure.
  • the nut 25 is supported on a support plate 26 with a spherical surface.
  • the support disc 26 in turn rests on the holding body 2 and is secured by means of a pin 27 which engages in a recess 28 on the holding body 2, against twisting when tightening the nut 25.
  • the support plate 26 also has a nose 29 which engages in a groove 30 of the Aktorfußverinrung 21 and thus also prevents rotation of the Aktorfußverinrung 21 when tightening the nut 25.
  • FIG. 3 shows an alternative exemplary embodiment of a piezo injector according to the invention, in which the electrical leads 12 and 13 are connected to internal contact elements 31 and 32 of the piezoelectric element 5. are clocked.
  • the actuator foot 9 is divided on the piezoelectric element 5 and still has a foot part 33.
  • the lines 12 and 13 are each connected via a plug connection 34 and 35 with the inner contact elements 31 and 32.
  • the piezoelectric element 5 can first be tested independently of the extended actuator foot 9 or 21 and then connected to the lower foot part 33 via the connectors 34 and 35 during assembly with the lines 12 and 13.
  • the foot part 33 can then be welded, for example, to the actuator base 9 with the actuator foot extension 21.
  • the lines 12 and 13 are additionally pressure-sealed by a glass melt 36 to the outside against leakage of a weld 37 or the piezoelectric element. 5
  • the invention is commercially applicable to controlling the stroke of a fuel injection needle, for example diesel fuel, in a motor vehicle.

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

Abstract

L'invention concerne un ensemble comportant un actionneur piézoélectrique, par exemple un injecteur piézoélectrique pour l'actionnement d'un composant mécanique, lequel ensemble présente une structure multicouche constituée de couches piézoélectriques maintenues dans un corps de maintien (2) en tant qu'élément piézoélectrique (5), des électrodes internes et des éléments de contact (22, 23 ; 31, 32) étant en contact mutuel sur cet élément piézoélectrique (5). Une base d'actionneur (9, 21 ; 33) est située entre l'élément piézoélectrique (5) et le corps de maintien (2), base à travers laquelle des lignes électriques (12, 13) sont dirigées vers les éléments de contact (22, 23 ; 31, 32), cette base d'actionneur (9, 21 ; 33) étant pressée contre le corps de maintien (2) au niveau d'un siège d'étanchéité (20) afin d'assurer l'étanchéité d'un espace intérieur (4) au moyen d'un liquide maintenu sous haute pression. Ladite base d'actionneur (9, 21 ; 33) peut être pressée contre le corps de maintien (2) au niveau d'un siège d'étanchéité bombé (20) au moyen d'un vissage de traction (21, 25).
PCT/EP2006/065058 2005-09-20 2006-08-04 Ensemble comportant un actionneur piezoelectrique WO2007033859A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06792691A EP1929553A1 (fr) 2005-09-20 2006-08-04 Ensemble comportant un actionneur piezoelectrique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005044851.8 2005-09-20
DE102005044851A DE102005044851A1 (de) 2005-09-20 2005-09-20 Anordnung mit einem Piezoaktor

Publications (1)

Publication Number Publication Date
WO2007033859A1 true WO2007033859A1 (fr) 2007-03-29

Family

ID=37057204

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/065058 WO2007033859A1 (fr) 2005-09-20 2006-08-04 Ensemble comportant un actionneur piezoelectrique

Country Status (3)

Country Link
EP (1) EP1929553A1 (fr)
DE (1) DE102005044851A1 (fr)
WO (1) WO2007033859A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230109492A1 (en) * 2021-10-04 2023-04-06 Billet Machine And Fabrication, Inc. Fuel injector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108199609B (zh) * 2018-02-09 2019-10-15 浙江师范大学 一种基于非牛顿流体的压电惯性驱动器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10142798A1 (de) * 2001-08-31 2003-04-03 Bosch Gmbh Robert Lagerung für ein Piezoaktormodul in einem Common-Rail-Injektor
WO2003069152A1 (fr) * 2002-02-13 2003-08-21 Siemens Aktiengesellschaft Element d'etancheite pour l'actionneur piezoelectrique d'une soupape d'injection de carburant
DE102004006266A1 (de) * 2003-02-10 2004-09-23 Denso Corp., Kariya Brennkraftmaschinen-Kraftstoffeinspritzvorrichtung
DE102004005447A1 (de) * 2004-02-04 2005-08-25 Robert Bosch Gmbh Piezoaktor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10142798A1 (de) * 2001-08-31 2003-04-03 Bosch Gmbh Robert Lagerung für ein Piezoaktormodul in einem Common-Rail-Injektor
WO2003069152A1 (fr) * 2002-02-13 2003-08-21 Siemens Aktiengesellschaft Element d'etancheite pour l'actionneur piezoelectrique d'une soupape d'injection de carburant
DE102004006266A1 (de) * 2003-02-10 2004-09-23 Denso Corp., Kariya Brennkraftmaschinen-Kraftstoffeinspritzvorrichtung
DE102004005447A1 (de) * 2004-02-04 2005-08-25 Robert Bosch Gmbh Piezoaktor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230109492A1 (en) * 2021-10-04 2023-04-06 Billet Machine And Fabrication, Inc. Fuel injector
US11939940B2 (en) * 2021-10-04 2024-03-26 Billet Machine And Fabrication, Inc. Fuel injector

Also Published As

Publication number Publication date
DE102005044851A1 (de) 2007-03-29
EP1929553A1 (fr) 2008-06-11

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