WO2002061856A1 - Method of assembling an actuator arrangement - Google Patents
Method of assembling an actuator arrangement Download PDFInfo
- Publication number
- WO2002061856A1 WO2002061856A1 PCT/GB2002/000377 GB0200377W WO02061856A1 WO 2002061856 A1 WO2002061856 A1 WO 2002061856A1 GB 0200377 W GB0200377 W GB 0200377W WO 02061856 A1 WO02061856 A1 WO 02061856A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sleeve member
- filler material
- piezoelectric element
- actuator arrangement
- chamber
- Prior art date
Links
Classifications
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- 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
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- 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
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- 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
- H10N30/01—Manufacture or treatment
- H10N30/02—Forming enclosures or casings
-
- 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
- H10N30/883—Further insulation means against electrical, physical or chemical damage, e.g. protective coatings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/42—Piezoelectric device making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49126—Assembling bases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
- Y10T29/49139—Assembling to base an electrical component, e.g., capacitor, etc. by inserting component lead or terminal into base aperture
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
- Y10T29/49146—Assembling to base an electrical component, e.g., capacitor, etc. with encapsulating, e.g., potting, etc.
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49155—Manufacturing circuit on or in base
- Y10T29/49165—Manufacturing circuit on or in base by forming conductive walled aperture in base
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49194—Assembling elongated conductors, e.g., splicing, etc.
- Y10T29/49195—Assembling elongated conductors, e.g., splicing, etc. with end-to-end orienting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49194—Assembling elongated conductors, e.g., splicing, etc.
- Y10T29/49201—Assembling elongated conductors, e.g., splicing, etc. with overlapping orienting
- Y10T29/49202—Assembling elongated conductors, e.g., splicing, etc. with overlapping orienting including oppositely facing end orienting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
Definitions
- This invention relates to a method of assembling an actuator arrangement for use in a fuel injector of the type intended for use in a fuel system of an internal combustion engine.
- the invention also relates to an actuator arrangement for use in a fuel injector of the type intended for use in a fuel system of an internal combustion engine.
- a piezoelectric actuator arrangement is operable to control the position occupied by a control piston, the piston being moveable to control the fuel pressure within a control chamber defined, in part, by a surface associated with the valve needle of the injector to control movement of the injector.
- the piezoelectric actuator typically includes a stack of piezoelectric elements, the axial length of which is controlled by applying a voltage across the stack through an electrical connector. It is known to arrange the piezoelectric stack within an accumulator volume which is arranged to receive high pressure fuel, in use, so as to apply a hydrostatic load to the stack.
- a method of assembling a piezoelectric actuator arrangement comprises the steps of;
- the piezoelectric element within a sleeve member such that the inner surface of the sleeve member and the outer surface of the piezoelectric element together define, at least in part, a chamber for receiving a first filler material;
- the present invention provides an advantage over conventional plastic over- moulding and metal-encapsulation techniques in that manufacturing costs are reduced. Additionally, an encapsulated actuator arrangement of reduced size can be formed.
- the method comprises the step of degassing the first filler material following injection thereof into the chamber so as to substantially remove any unwanted air or gas from the first filler material.
- the method may comprise the further step of injecting a second filler material into the sleeve member prior to injection of the first filler material so as to fill any recesses or pockets within the sleeve member with the second filler material which may otherwise trap air during injection of the first filler material, wherein the second filler material has a relatively high viscosity compared to the viscosity of the first filler material.
- the first filler material may have a viscosity in the range between 400 and 800 rnPas and the second filler material may have a viscosity in the range between 5,000 and 10,000 mPas.
- the first and second filler materials may take the form of a curable resin.
- the sleeve member is formed from a fluoropolymer or plastic material.
- the method preferably includes the further steps of arranging a shaft in the sleeve member such that angular movement of the shaft causes angular movement of the sleeve member and the piezoelectric element, providing means for applying a heating effect to the sleeve member, and angularly moving the shaft such that the heating effect is applied substantially umformly to the circumferential surface of the sleeve member.
- the method may include the further step of moving the shaft in an axial direction as the shaft is moved angularly, so as to ensure a substantially uniform heating effect is applied to the circumferential surface of the sleeve member along its entire axial length.
- the first filler material may be injected into the chamber through the hollow shaft.
- the sleeve member may be provided with an aperture through which the first filler material is injected into the chamber.
- the method preferably comprises the further step of securing electrical connection means for applying a voltage across the piezoelectric element, in use, to the first end of the piezoelectric element.
- the method may comprise the further step of securing an end member to the second end of the piezoelectric element and applying protective means to at least one of the electrical connection means and the end member so as to avoid contamination of the end member and/or the electrical connection means by the first filler material.
- the protective means may take the form of protective members or plugs formed from a flexible material so as to facilitate ease of removal of the protective means from the end member and/or the electrical connection means.
- the piezoelectric actuator arrangement may include a plurality of piezoelectric elements arranged in a stack, or may include a single piezoelectric element.
- a piezoelectric actuator arrangement for use in a fuel injector comprising an accumulator volume for receiving fuel, in use, comprises a piezoelectric element which is arranged within a sleeve member, an inner surface of the sleeve member and an outer surface of the piezoelectric element together defining, at least in part, a chamber containing a filler material such that, when the actuator arrangement is in use, a force due to fuel pressure within the accumulator volume is applied to the piezoelectric element through the sleeve member and the filler material.
- the sleeve is formed from a heat-shrinkable material which deforms to form a seal against the first filler material upon application of heat thereto during assembly of the arrangement.
- an actuator arrangement comprises a stack 12 of piezoelectric elements.
- the actuator arrangement is of the type suitable for use in a fuel injector for delivering fuel to an engine cylinder of an internal combustion engine.
- a first end of the piezoelectric stack 12 is secured to an electrical connector 14 to which electrical wires 16 are connected so as to apply a voltage across the piezoelectric stack 12 when the injector is in use.
- a second end of the piezoelectric stack is in connection with an end member 18 which is co-operable, in use, with a piston member (not shown) associated with a valve needle of the injector.
- the end member 18 is caused to move so as to apply a retracting force to the control piston associated with the valve needle.
- control piston is arranged to control fuel pressure within a control chamber.
- the pressure of fuel within the control chamber applies a force to the valve needle which determines whether the valve needle is seated against a valve seating, in which case fuel injection does not occur, or whether the valve needle is lifted away from its seating, in which case fuel injection does occur.
- the end member 18 associated with the piezoelectric stack 12 may be coupled directly to the valve needle of the injector, or may be coupled to a servo-valve arrangement in a known manner.
- the pre-assembled actuator arrangement 10 shown in Figure 1 is arranged within an accumulator volume (not shown) defined within an injector housing.
- the accumulator volume receives fuel at high pressure such that a hydrostatic load is applied to the piezoelectric stack 12. It is important that the electrical connections of the actuator arrangement and the stack are substantially sealed from fuel within the accumulator volume.
- the actuator arrangement is therefore assembled by performing the following steps. Initially, the actuator arrangement 10 is inserted into one end of a sleeve member 20, as shown in Figure 2.
- Protective means typically in the form of one or more protective members or plugs 22 are applied to the exposed end surfaces of the end member 18 and the electrical connector 14.
- a rotatable shaft 26 is inserted into the sleeve member 20.
- the outer surface of the piezoelectric stack 12 and the inner surface of the sleeve member 20 together define a chamber 24.
- a heating effect is applied to the end of the sleeve member 20 adjacent the end member 18 such that the sleeve member 20 deforms to form a seal 25 with an outer surface of the end member 18 by means of a 'heat shrinking' process.
- the heating effect may be applied by any heat source 27 which is sufficient to provide an adequate heating effect to deform the sleeve member 20 to seal against the end member 18.
- a heating effect is also applied to the end of the sleeve member adjacent the shaft 26 such that the sleeve member 20 deforms to seal against the shaft 26.
- the sleeve member 20 may be formed from a fluoropolymer or plastic material which deforms when a heating effect is applied thereto.
- the shaft 26 is provided with a through bore 28 through which a filler material 30 is delivered to the chamber 24.
- the prospective members 22 are arranged to ensure that the exposed end surfaces of the end member 18 and the electrical connector 14 are not contaminated by filler material 30 as it is injected into the chamber 24.
- the filler material 30 may take the form of a curable epoxy resin having a relatively low viscosity. Typically, the viscosity of the filler material 30 is in the range between 400- 800 mPas.
- the filler material provides good adhesion between the sleeve member 20 and the actuator arrangement 10 and also ensures a substantially uniform distribution of the hydrostatic load from fuel with the accumulator volume is applied to the actuator arrangement 10, through the sleeve member 20 and the filler material 30, when the injector is in use.
- the filler material 30 also ensures the actuator arrangement is sealed against the ingress of fuel from the accumulator volume.
- a degassing process is applied to the filler material 30 so as to substantially remove any unwanted air within the filler material 30.
- the degassing process may be provided by means of a heat treatment followed by the application of a vacuum.
- a vacuum may be drawn in the material-filled chamber by means of the through bore 28 provided in the shaft 26.
- the shaft 26 is moved angularly about its axis, thereby causing angular movement of the sleeve member 20 and the actuator arrangement 10.
- the heat source 27 is moved axially along the length of the sleeve member 20 such that a substantially uniform heating effect is applied to the outer surface of the sleeve member 20.
- the application of heat to the sleeve member 20 causes the sleeve member 20 to deform by means of a 'heat slninking' process, thereby causing the sleeve member 20 to adopt the profile of the outer surface of the actuator arrangement 10.
- the filler material 30 takes the form of a curable epoxy resin
- the resin is allowed to cure before the shaft 26 is removed from the uppermost end of the sleeve member 20.
- the extreme ends of the sleeve member 20 are cut to the required length and the protective plugs 22 are removed from the end member and the electrical connector, leaving the actuator arrangement 10 substantially encapsulated within the sleeve member 20, as illustrated in Figure 5.
- the protective members 22 are formed from a flexible material to facilitate ease of removal.
- a second filler material having a relatively high viscosity, may be introduced into the sleeve member 20 to fill any unavoidable recesses or pockets within the arrangement which may otherwise trap air during the filling process. If the second filler material is introduced, it is preferable to ensure that this material is allowed to cure sufficiently before the sleeve member 20 is heat shrunk to form a seal 25 with the end member 18.
- the second filler material of relatively high viscosity may also take the form of a curable resin.
- the second filler material conveniently has a viscosity in the range between 5,000 and 10,000 mPas.
- the actuator arrangement 10 can be introduced into the fuel injector in a conventional manner, the actuator arrangement being arranged such that the outer surface of the sleeve member 20 is exposed to fuel pressure within the accumulator volume of the injector when the injector is in use.
- the filler material 30 need not take the form of an epoxy resin, but may take the form of any relatively low viscosity material which is sufficient to ensure there is a substantially uniform distribution of the hydrostatic load on the piezoelectric stack 12 when the accumulator volume is filled with fuel at high pressure.
- the filler material may take the form of a polyurefhane resin.
- the filler material must also provide good adhesion between the sleeve member 20 and the piezoelectric stack 12 and must have electrically insulating properties.
- the filler material must also be sufficient to ensure the encapsulated actuator arrangement assembly is substantially impermeable to the ingress of fuel under high pressure within the accumulator volume.
- the filler material may be formed from silicone rubber.
- a suitable material for the sleeve member 20 is a radiation cross-linked modified fluoropolymer. It will be appreciated, however, that other suitable heat shrinkable materials may be used. It is important that the materials from which the sleeve 20 and the filler material 30 are formed have chemical properties which resist chemical damage caused by fuel within the accumulator volume.
- the sleeve member 20 may be provided with an opening or aperture 32, as shown in Figure 6, to permit the filler material 30 to be injected into the chamber 24. It will be appreciated that, if the aperture 32 is provided, the shaft 26 need not be provided with the through bore 28.
- the assembly may remain stationary whilst a heat source is translated circumferentially and axially relative to the sleeve member 20.
- a heat source of annular form may be translated along the axial length of the sleeve member 20 so as to cause deformation of the sleeve member 20.
- the filler material 30 may be delivered to the chamber 24 through a length of flexible plastic tubing, one end of which extends into the chamber 24 and the other end of which remains submerged within a reservoir of filler material 30 during delivery of the filler material 30.
- the heating effect may be applied to the sleeve member 20 by placing the arrangement in an oven.
- the piezoelectric actuator arrangement 10 need not include a stack of elements, but may include a single piezoelectric element.
- the present invention provides the advantage that the encapsulated actuator arrangement is relatively compact. In fuel injector applications, where the available accommodation space for the actuator arrangement is limited, this provides a particular advantage. Furthermore, the encapsulation of the actuator arrangement within the sleeve 20 filled with filler material 30 ensures the entire assembly is substantially impermeable to fuel under high pressure which may otherwise contaminate the actuator arrangement. The invention therefore minimises the risk of an electrical failure occurring within the injector, in use. However, it will be appreciated that the actuator arrangement assembled in accordance with the present invention may also be employed in alternative applications, and need not necessarily be installed in a fuel injector for use in an internal combustion engine.
- the present invention provides a further advantage over metal-encapsulation techniques in that manufacturing costs are reduced.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60231787T DE60231787D1 (en) | 2001-02-01 | 2002-01-29 | PROCESS FOR PRODUCING AN ACTUATOR |
US10/470,815 US7036198B2 (en) | 2001-02-01 | 2002-01-29 | Method of assembling an actuator arrangement |
EP02710121A EP1356529B1 (en) | 2001-02-01 | 2002-01-29 | Method of assembling an actuator arrangement |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0102500.6 | 2001-02-01 | ||
GBGB0102500.6A GB0102500D0 (en) | 2001-02-01 | 2001-02-01 | Method of assembling an actuator arrangement |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002061856A1 true WO2002061856A1 (en) | 2002-08-08 |
Family
ID=9907892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2002/000377 WO2002061856A1 (en) | 2001-02-01 | 2002-01-29 | Method of assembling an actuator arrangement |
Country Status (5)
Country | Link |
---|---|
US (1) | US7036198B2 (en) |
EP (1) | EP1356529B1 (en) |
DE (1) | DE60231787D1 (en) |
GB (1) | GB0102500D0 (en) |
WO (1) | WO2002061856A1 (en) |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1574702A1 (en) * | 2004-03-11 | 2005-09-14 | Delphi Technologies, Inc. | A method of assembling a fuel injector |
EP1783842A1 (en) | 2005-11-04 | 2007-05-09 | Delphi Technologies, Inc. | Actuator arrangement |
EP1788232A1 (en) | 2005-11-16 | 2007-05-23 | Siemens Aktiengesellschaft | Actuator apparatus and fluid injector |
EP1854996A1 (en) | 2006-05-08 | 2007-11-14 | Siemens Aktiengesellschaft | Piezoelectric actuator, method for the production of a piezoelectric actuator and injection system with such an actuator |
EP1854992A1 (en) | 2006-05-09 | 2007-11-14 | Siemens Aktiengesellschaft | Fuel injection system and method of manufacture |
WO2007128948A1 (en) * | 2006-05-03 | 2007-11-15 | Delphi Technologies, Inc. | Method for enshrouding an actuator |
WO2007141134A1 (en) * | 2006-06-06 | 2007-12-13 | Robert Bosch Gmbh | Arrangement with a coated piezo actuator |
EP1909339A1 (en) * | 2006-10-02 | 2008-04-09 | Robert Bosch Gmbh | Actuator module having an enshrouded piezo actuator |
DE102006062561A1 (en) | 2006-12-29 | 2008-07-03 | Robert Bosch Gmbh | Piezoelectric actuator |
DE102007001566A1 (en) | 2007-01-10 | 2008-07-17 | Robert Bosch Gmbh | Method for manufacturing of piezoactuator, involves assembling of isolating material on active lateral areas of piezoactuators and subjecting it to plasma treatment on exterior |
EP1956229A1 (en) | 2007-02-09 | 2008-08-13 | Delphi Technologies, Inc. | Piezoelectric actuator and enclosure therefor |
DE102007016870A1 (en) | 2007-04-10 | 2008-10-16 | Robert Bosch Gmbh | Piezoelectric actuator for fuel injection valve of air-compressing, self-igniting internal-combustion engine, has actuator body with electrode layers, and heat shrink tube enclosing actuator body surrounded with adhesive strap |
EP2031669A1 (en) | 2007-08-28 | 2009-03-04 | Robert Bosch GmbH | Piezo actuator module having a piezo actuator sleeve and method for its manufacture |
DE102007040508A1 (en) | 2007-08-28 | 2009-03-05 | Robert Bosch Gmbh | Piezo actuator module and piezo actuator with a media-resistant protective layer and a method for producing the protective layer on the piezoelectric actuator |
DE102006006077B4 (en) * | 2006-02-09 | 2009-04-09 | Continental Automotive Gmbh | Piezoceramic multilayer actuator, method for producing a piezoceramic multilayer actuator and injection system |
EP2086029A2 (en) | 2008-02-01 | 2009-08-05 | Robert Bosch Gmbh | Piezo actuator and piezo actuator module with at least one protective coating system surrounding the piezo actuator |
EP2109160A1 (en) | 2008-04-11 | 2009-10-14 | Robert Bosch GmbH | Piezo actuator module for an assembly surrounded by a flowing medium |
EP2372139A1 (en) | 2010-03-25 | 2011-10-05 | Delphi Technologies Holding S.à.r.l. | Actuator Arrangement for use in a Fuel Injector |
EP2378107A1 (en) | 2010-04-19 | 2011-10-19 | Delphi Technologies Holding S.à.r.l. | Actuator arrangement for use in a fuel injector |
EP2426749A1 (en) | 2010-09-01 | 2012-03-07 | Delphi Technologies Holding S.à.r.l. | Actuator arrangement for use in a fuel injector |
EP2476896A1 (en) | 2011-01-13 | 2012-07-18 | Delphi Automotive Systems Luxembourg SA | Actuator arrangement for use in a fuel injector |
DE102006006076B4 (en) * | 2006-02-09 | 2014-10-02 | Continental Automotive Gmbh | Piezo actuator, method for producing a piezo actuator and injection system with such |
CN114784178A (en) * | 2022-06-22 | 2022-07-22 | 上海隐冠半导体技术有限公司 | Piezoelectric actuator and moving device |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE602006016234D1 (en) * | 2006-04-25 | 2010-09-30 | Delphi Tech Holding Sarl | Schutzverkapselung |
US7658631B2 (en) * | 2007-06-25 | 2010-02-09 | Caterpillar Inc. | Four wire elastomeric seal and fuel injector using same |
DE102007042400A1 (en) | 2007-09-06 | 2009-03-12 | Robert Bosch Gmbh | Piezoactuator module with a protective layer system and a method for its production |
DE102007042402A1 (en) | 2007-09-06 | 2009-03-12 | Robert Bosch Gmbh | Piezoactuator module with a protective layer system and a method for its production |
DE102007042401A1 (en) | 2007-09-06 | 2009-03-12 | Robert Bosch Gmbh | Piezoactuator module with a protective layer system and a method for its production |
EP2343746B1 (en) | 2010-01-11 | 2012-10-24 | Delphi Technologies Holding S.à.r.l. | Method of Encapsulating an Actuator having a Piezoelectric Actuator Stack |
DE102010050265A1 (en) | 2010-11-02 | 2012-05-03 | Epcos Ag | Method for producing an actuator unit and sleeve for receiving a piezoelectric actuator |
JP6451657B2 (en) * | 2016-01-29 | 2019-01-16 | Tdk株式会社 | Piezoelectric actuator |
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US4553059A (en) * | 1983-11-10 | 1985-11-12 | Nippon Soken, Inc. | Piezoelectric actuator and a piezoelectric pump injector incorporating the same |
JPH02276280A (en) * | 1989-04-18 | 1990-11-13 | Toyota Motor Corp | Piezoelectric laminated body |
JPH03174783A (en) * | 1989-09-19 | 1991-07-29 | Fuji Electric Co Ltd | Laminated type piezoelectric element |
WO1992006532A1 (en) * | 1990-09-28 | 1992-04-16 | Caterpillar Inc. | Coating surrounding a piezoelectric solid state motor stack |
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- 2002-01-29 US US10/470,815 patent/US7036198B2/en not_active Expired - Fee Related
- 2002-01-29 WO PCT/GB2002/000377 patent/WO2002061856A1/en not_active Application Discontinuation
- 2002-01-29 EP EP02710121A patent/EP1356529B1/en not_active Expired - Lifetime
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Also Published As
Publication number | Publication date |
---|---|
US20040113525A1 (en) | 2004-06-17 |
EP1356529A1 (en) | 2003-10-29 |
GB0102500D0 (en) | 2001-03-14 |
US7036198B2 (en) | 2006-05-02 |
DE60231787D1 (en) | 2009-05-14 |
EP1356529B1 (en) | 2009-04-01 |
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