EP2055927B1 - Aktuatoranordnung und Einspritzventil - Google Patents

Aktuatoranordnung und Einspritzventil Download PDF

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Publication number
EP2055927B1
EP2055927B1 EP20070021324 EP07021324A EP2055927B1 EP 2055927 B1 EP2055927 B1 EP 2055927B1 EP 20070021324 EP20070021324 EP 20070021324 EP 07021324 A EP07021324 A EP 07021324A EP 2055927 B1 EP2055927 B1 EP 2055927B1
Authority
EP
European Patent Office
Prior art keywords
solid state
actuator
state actuator
actuator unit
actuator arrangement
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
EP20070021324
Other languages
English (en)
French (fr)
Other versions
EP2055927A1 (de
Inventor
Enio Biasci
Edoardo Giorgetti
Claudio Malasoma
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
Priority to DE200760006816 priority Critical patent/DE602007006816D1/de
Priority to EP20070021324 priority patent/EP2055927B1/de
Publication of EP2055927A1 publication Critical patent/EP2055927A1/de
Application granted granted Critical
Publication of EP2055927B1 publication Critical patent/EP2055927B1/de
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—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
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials

Definitions

  • the invention relates to an actuator arrangement and injection valve.
  • Actuator arrangements are in wide spread use, in particular injection valves for instance for internal combustion engines comprise actuator arrangements, which comprise solid state actuator units.
  • actuator arrangements which comprise solid state actuator units.
  • the solid state actuator unit In order to inject fuel, the solid state actuator unit is energized so that a fluid flow through the fluid outlet portion of the injection valve is enabled.
  • the respective injection valve may be suited to dose fluids under very high pressures.
  • the pressures may be in case of a gasoline engine, for example in a range of up to 200 * 10 5 kg/(m*s 2 ) or in the case of diesel engines in a range of up to 2,000 * 10 5 kg/(m*s 2 ).
  • electric energy needs to be transmitted to or from the actuator arrangement in a very fast way.
  • US 6,814,314 B discloses a fuel injection valve, which comprises a piezoelectric or magnetostrictive actuator. To compensate for temperature expansion, at least one damping element made of a solid is present and exhibits an almost static behavior at a high deformation rate and is elastically or plastically deformable at a low deformation rate.
  • US 4,725,002 A discloses a metering valve with a piezoelectric control member.
  • the metering valve comprises a damping piston connected axially to the piezoelectric control member to compensate slow changes in the length of the piezoelectric control member.
  • a valve housing defines with the end face of the piston a damping chamber, which is filled with a damping liquid.
  • WO 02/40858 A discloses an injector housing with an actuator comprising a head plate.
  • a first damping disc is arranged between the head plate of the actuator and a housing body.
  • Means for exerting a force are arranged in the housing body, by means of which the actuator is pressed against the first damping disc.
  • the object of the invention is to create an actuator arrangement that is simply to be manufactured and which enables reliable operation.
  • the invention is distinguished by an actuator arrangement, comprising a housing body with a recess, and a solid state actuator unit within the recess with a longitudinal axis comprising electric pins being electrically coupable to a power supply.
  • the solid state actuator unit comprises a first axial end area designed to act as drive side and a second axial end area facing a free volume of the recess, wherein the free volume is filled at least in part with a damping body and the damping body comprises micro plastic balls.
  • the damping body may comprise liquid, solid state or gel, wherein the gel corresponds to a visco-elastic fluid.
  • the damping body comprises a silicon based filler.
  • the damping body comprises a foam.
  • the damping body comprises micro rubber balls.
  • the damping body comprises a channel being designed to penetrate and provide a fluid communication between the free volume and at least a part of the surface of the solid state actuator unit.
  • the invention is distinguished by an injection valve with a valve assembly within a recess and an actuator arrangement of the first aspect of the invention, comprising a solid state actuator unit within the recess, wherein the solid state actuator unit is being designed for acting on the valve assembly.
  • Figure 1 shows an actuator arrangement 10 comprising a housing body 12 with a recess 14, and a solid state actuator unit 16 within the recess 14 of the housing body 12 with a longitudinal axis A comprising electric pins 18 being electrically coupable to a power supply.
  • the electric pins 18 might be coupled by weldings, in particular resistance weldings, or soldered connections to an electric conductor 70 ( figure 2 ), which is supplied with electric energy.
  • injection valves for instance for internal combustion engines may comprise the actuator arrangement.
  • the solid state actuator unit 16 comprises a solid state actuator 20.
  • the solid state actuator 20 changes its length in axial direction depending on a control signal applied to it such as electric energy supplied to it.
  • the solid state actuator unit 16 is typically a piezo actuator unit. It may however also be any other solid state actuator unit known to the person skilled in the art such as a magnetostrictive actuator unit.
  • the solid state actuator unit 16 comprises a first axial end area 22 designed to act as drive side and a second axial end area 24, which is facing away from the first axial end area 22, facing a free volume 26 of the recess 14, in particular directly facing it.
  • the electric pins 18 can be arranged in optional direction, for instance in axial direction of the solid state actuator unit 16 or perpendicular to it. In particular, the electric pins 18 protrude in the free volume 26.
  • On the drive side of the solid state actuator unit 16 facing the first axial end area 22 optional actuating elements are arranged such as a valve needle or a rotor.
  • An actuator housing enclosing the solid state actuator 20 may comprise a spring tube 28, a top cap 30 and a bottom cap 31.
  • Part of the top cap 30 may form at least part of the second axial end area 24.
  • Part of the bottom cap 31 may form at least part of the first axial end area 22 comprising the drive side of the solid state actuator unit 16.
  • the solid state actuator unit 16 further comprises a piston 32, which is coupled to the top cap 30 or may in one peace form part of the top cap 30. It may apply an axial preload force on the solid state actuator unit 16.
  • the energizing of the solid state actuator unit 16 may cause undesired movements and vibrations within the actuator arrangement 10, which for example might stress weldings.
  • a damping body 34 With the damping body 34 beeing mechanically coupled to the second axial end area 24 of the solid state actuator unit 16, undesired movements of the solid state actuator unit 16 can be prevented and vibrations within the second axial end area 24 of the actuator arrangement 10 can be limited.
  • electric connections and resistance weldings between the electric pins 18 of the solid state actuator unit 16 and the power supply can be protected against undesired movements and vibrations.
  • the damping body 34 comprises micro plastic balls such as micro rubber balls or combinations of the same with a silicon based filler or a foam.
  • the damping body 34 within the actuator arrangement 10 is simply to be manufactured.
  • the silicon based filler or the foam there has to be no additional separation from the damping body 34 to the rest of the free volume 26, since none of them is fluid.
  • an additional limitative element such as a spring rest may be advantageous.
  • the micro plastic balls show dimensions of a radius in a range of 0.3 mm up to 1.0 mm, whereas an especially advantageous radius is 0.5 mm.
  • the damping body 34 may comprise a channel 36 being designed to penetrate and provide a fluid communication between the free volume 26 and at least a part of the surface of the solid state actuator unit 16.
  • the channel 36 may provide fluid communication between at least a part of the shell of the solid state actuator unit 16 and the free volume 26. Therefore, the channel 36 as a simple element allows a continuous oxygen flow within the actuator arrangement 10. In particular, it prevents breaking of the ceramic by providing an oxygen flow advantageous for ceramic.
  • FIG. 2 shows an injection valve 38 that may be used as a fuel injection valve for an internal combustion engine.
  • the injection valve 38 comprises a valve assembly 40, the solid state actuator unit 16 and a connector 42.
  • the injection valve 38 has a two-part housing body 44, 46 with a tubular shape which has the central longitudinal axis
  • the valve assembly 40 comprises a valve body 48 and a valve needle 50.
  • the valve body 48 has a valve body spring rest 52 and the valve needle 50 comprises a valve needle spring rest 54, both spring rests 52, 54 supporting a spring 56 arranged between the valve body 48 and the valve needle 50.
  • a bellow 58 is arranged which is sealingly coupling the valve body 48 with the valve needle 50. By this a fluid flow between the recess 14 and a chamber 60 is prevented.
  • the bellow 58 is formed and arranged in a way that the valve needle 50 is actuable by the solid state actuator unit 16.
  • a fluid outlet portion 62 is closed or open depending on the axial position of a valve needle 50.
  • the solid state actuator 20 can exert a force to the valve needle 50.
  • the force from the solid state actuator 20 being exerted to the valve needle 50 in an axial direction allows or prevents a fluid flow through the fluid outlet portion 62.
  • the injection valve 38 has a fluid inlet portion 64 which is arranged in the housing body 44, 46 and which for instance is coupled to a not shown fuel connector.
  • the fuel connector is designed to be connected to a high pressure fuel chamber of an internal combustion engine, the fuel is stored under high pressure, for example, under the pressure above 200 ⁇ 10 5 Pa (200 bar).
  • the valve assembly 40 is arranged in the injection valve 38 facing the first axial end area 22 on the drive side of the solid state actuator unit 16 sharing a part of the recess 14 of the housing body 44 of the actuator arrangement 10 along the longitudinal axis A.
  • a thermal compensator unit 66 is arranged facing the second axial end area 24 of the solid state actuator unit 16 and facing the free volume 26 and is mechanically coupled to the piston 32 of the solid state actuator 20.
  • the thermal compensator unit 66 enables to set an axial preload force on the solid state actuator unit 16 via the piston 32 to compensate changes of the fluid flow through the fluid outlet portion 62 in the case of temperature changes of the injection valve 38.
  • the injection valve 38 further comprises the connector 42 with a non-conductive connector body 68 in which an electric conductor 70 is arranged. Electric energy can be supplied to the electric conductor 70 of the connector 42.
  • the solid state actuator unit 16 comprises an adapter 72 consisting of terminal elements 74. The electric conductor 70 of the connector 42 is electrically coupled to one of the terminal elements 74 of the adapter 72 which is electrically coupled to another of the terminal elements 74 which on its part is electrically coupled to the electric pins 18 of the solid state actuator 20. Consequently, electric energy can be simply supplied to the solid state actuator 20 via the connector 42.
  • the damping body 34 which is filled at least into a part of the free volume 26, may be conterminous to limitative elements facing the second axial end area 24 of the solid state actuator unit 16.
  • the limitative element may be a spring rest of the thermal compensator unit 66. In this case, especially reliable damping of undesired movements of the solid state actuator unit 16 and vibrations within the second axial end area 24 of the actuator arrangement 10 is accomplished.
  • the valve needle 50 prevents a fluid flow through the fluid outlet portion 62 in the valve body 48 in a closing position of the valve needle 50. Outside of the closing position of the valve needle 50, the valve needle 50 enables the fluid flow through the fluid outlet portion 62.
  • the solid state actuator 20 may change its axial length if it is energized. By changing its length the solid state actuator 20 may exert a force on the valve needle 50.
  • the valve needle 50 is able to move in axial direction out of the closing position. Outside the closing position of the valve needle 50 there is a gap between the valve body 48 and the valve needle 50 at the first axial end area 22 of the injection valve 38 facing away from the solid state actuator 20.
  • the spring 56 can force the valve needle 50 via the valve needle spring rest 54 towards the solid state actuator 20. In the case the solid state actuator 20 is de-energized, the solid state actuator 20 shortens its length.
  • the spring 56 can force the valve needle 50 to move in axial direction in its closing position. It is depending on the force balance between the force on the valve needle 50 caused by the solid state actuator 20 and the force on the valve needle 50 caused by the spring 56 whether the valve needle 50 is in its closing position or not.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Claims (6)

  1. Aktuatoranordnung (10), umfassend
    einen Gehäusekörper (12) mit einer Aussparung (14) und
    einer Festkörperaktuatoreinheit (16) mit einer Längsachse (A) innerhalb der Aussparung (14), umfassend elektrische Stifte (18), die elektrisch an eine Energieversorgung koppelbar sind, während die Festkörperaktuatoreinheit (16) einen ersten axialen Endbereich (22), der gestaltet ist, um als eine Antriebsseite zu agieren, sowie einen zweiten axialen Endbereich (24) aufweist, der einem freien Volumen (26) der Aussparung (14) gegenüberliegt, während das freie Volumen (26) mindestens zum Teil mit einem Dämpfkörper (34) gefüllt ist, dadurch gekennzeichnet, dass der Dämpfkörper (34) Mikroplastikbälle umfasst.
  2. Aktuatoranordnung gemäß Anspruch 1, während der Dämpfkörper (34) einen Silizium basierten Füllstoff aufweist.
  3. Aktuatoranordnung gemäß einem der vorhergehenden Ansprüche, wobei der Dämpfkörper (34) einen Schaum umfasst.
  4. Aktuatoranordnung gemäß Anspruch 1, während die Mikroplastikbälle Mikrogummibälle sind.
  5. Aktuatoranordnung gemäß einem der vorhergehenden Ansprüche, während der Dämpfkörper (34) einen Kanal (36) aufweist, der gestaltet ist, um eine Flüssigkeitsverbindung zwischen dem freien Volumen (26) und mindestens einem Teil der Oberfläche der Festkörperaktuatoreinheit (16) zu durchdringen und bereitzustellen.
  6. Einspritzventil (38) mit einer Ventilanordnung (40) innerhalb einer Aussparung (14) sowie einer Aktuatoranordnung (10) gemäß einem der vorhergehenden Ansprüche, umfassend eine Festkörperaktuatoreinheit (16) innerhalb der Aussparung (14), während die Festkörperaktuatoreinheit (16) gestaltet ist zum Betätigen der Ventilanordnung (40).
EP20070021324 2007-10-31 2007-10-31 Aktuatoranordnung und Einspritzventil Ceased EP2055927B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE200760006816 DE602007006816D1 (de) 2007-10-31 2007-10-31 Aktuatoranordnung und Einspritzventil
EP20070021324 EP2055927B1 (de) 2007-10-31 2007-10-31 Aktuatoranordnung und Einspritzventil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20070021324 EP2055927B1 (de) 2007-10-31 2007-10-31 Aktuatoranordnung und Einspritzventil

Publications (2)

Publication Number Publication Date
EP2055927A1 EP2055927A1 (de) 2009-05-06
EP2055927B1 true EP2055927B1 (de) 2010-05-26

Family

ID=39433022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070021324 Ceased EP2055927B1 (de) 2007-10-31 2007-10-31 Aktuatoranordnung und Einspritzventil

Country Status (2)

Country Link
EP (1) EP2055927B1 (de)
DE (1) DE602007006816D1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106407517A (zh) * 2016-08-31 2017-02-15 同济大学建筑设计研究院(集团)有限公司 一种基于位移法的粘滞阻尼墙变形分解方法

Family Cites Families (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
DE19947779A1 (de) 1999-10-02 2001-04-12 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10057495B4 (de) 2000-11-20 2005-08-04 Siemens Ag Injektorgehäuse mit einer Aktoreinheit
DE102004046095B4 (de) * 2004-09-23 2018-02-15 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004050224A1 (de) * 2004-10-15 2006-04-20 Robert Bosch Gmbh Aktormodul
DE102005029976A1 (de) * 2005-06-28 2007-01-11 Robert Bosch Gmbh Brennstoffeinspritzventil

Also Published As

Publication number Publication date
DE602007006816D1 (de) 2010-07-08
EP2055927A1 (de) 2009-05-06

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