EP1135595B1 - Ventil zum steuern von flüssigkeiten - Google Patents
Ventil zum steuern von flüssigkeiten Download PDFInfo
- Publication number
- EP1135595B1 EP1135595B1 EP00975772A EP00975772A EP1135595B1 EP 1135595 B1 EP1135595 B1 EP 1135595B1 EP 00975772 A EP00975772 A EP 00975772A EP 00975772 A EP00975772 A EP 00975772A EP 1135595 B1 EP1135595 B1 EP 1135595B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- piezoelectric unit
- valve according
- tolerance
- compensating
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
Definitions
- the invention relates to a valve for controlling Liquids according to the preamble of claim 1.
- a valve for controlling Liquids according to the preamble of claim 1.
- Such a valve is known from EP 0 477 400 A1 can be actuated via a piezoelectric actuator, already known.
- This known valve has an arrangement for an adaptive, mechanical acting in the stroke direction Tolerance compensation for a path transformer of the piezoelectric Actuator on which the deflection of the piezoelectric Actuator is transmitted via a hydraulic chamber.
- the hydraulic chamber which is called a hydraulic Translation works, closes them between two delimiting pistons, one of which has a piston is formed smaller and with a is to be controlled valve member and the other Piston is formed with a larger diameter and is connected to the piezoelectric actuator, a common Compensation volume.
- the hydraulic chamber is between the two pistons clamped that the actuating piston of the valve member, in its rest position using one or more springs is held relative to a predetermined position, a around the ratio of the piston diameter makes increased stroke when the larger piston through the piezoelectric actuator moved by a certain distance becomes.
- the valve member, the pistons and the piezoelectric Actuators lie one behind the other on a common axis.
- the invention has for its object a valve for Control of liquids with a piezoelectric To create unit in which a tolerance compensation element to compensate for elongation tolerances of the piezoelectric unit and / or other valve components with little space requirement with a simple construction is realized.
- valve according to the invention for controlling liquids with the characterizing features of claim 1 the advantage that it works with a high natural frequency, because a direct power transmission via the deflection element without a translation with which the natural frequency is quadratic decreases, is provided.
- valve with the arrangement according to the invention of piezoelectric unit, deflection element and tolerance compensation element has a compact structure.
- the tolerance compensation element for in particular Elongation tolerances due to temperature changes are included inexpensive according to the invention with simple mechanical means realized.
- the embodiment shown in the figure shows a preferred use of the valve according to the invention in a fuel injection valve 1 for internal combustion engines of motor vehicles.
- the fuel injector 1 is present as a common rail injector Injection of diesel fuel trained.
- an injection duration and an injection quantity over force relationships in the Fuel injection valve 1 becomes a valve member 2 a piezoelectric unit 3 with a piezoelectric Actuator 4, which is on a remote from the combustion chamber Side of the valve member 2 arranged in a piezo chamber 5 which is in turn in a valve body or valve housing 6 is formed.
- the piston-shaped valve member 2 is axially displaceable in a bore 7 of the valve body designed as a longitudinal bore 6 arranged and has on its combustion chamber side End of a valve head 8 forming a valve closing member on.
- the valve member 2 is in the present case as a 2/2 valve formed, the valve head 8 with one on the Valve body 6 formed first seat 9 and second seat 10 cooperates. Doing so will take off State of the valve head 8 connects to a Spring chamber 11 with a restoring force on the externally opening valve head 8 exerting spring device 12 manufactured.
- valve member as a 2/3 valve works with a middle position.
- the spring chamber 11 is connected to the combustion chamber Flow restrictor 13, which leads to a valve control chamber 14 leads in which one only symbolically indicated in the figure Injection line 15 opens, which in turn from one common high pressure storage space for all fuel injection valves (Common Rail) 16 leads away.
- the high pressure storage room 16 is in a known manner from one High pressure fuel delivery pump with high pressure fuel filled from a storage tank.
- the piezoelectric actuator 4 for actuating the valve member 2 is made up of several thin layers and has a piezo head on the side facing the combustion chamber 17 and one on its side facing away from the combustion chamber Piezo foot with an electrical contact 19.
- the Piezo head 17 is provided with a deflection element 20, by means of which a deflection of the piezoelectric actuator 4 on the Valve member 2 is transferable, connected, the piezoelectric unit 3 in the direction of movement Valve member 2 with its piezo head 17 facing it within a longitudinal extent of the deflecting element 20 is arranged.
- the deflecting element 20 represents a essentially closed and an interior 21 delimiting Deflection sleeve.
- the piezoelectric actuator 4 is with the deflection sleeve 20 via a tolerance compensation element 22 to compensate for Elongation tolerances of the piezoelectric unit 3 or other valve components such as of the valve member 2 or of the valve body 6 connected.
- the tolerance compensation element 22 is parallel to the piezoelectric unit 3 arranged, on the one hand with the piezo head 17 and on the other hand with a support 23 on the deflection sleeve 20 in an area connected to the piezo foot 18 is.
- the tolerance compensation element with a different number of compensating bolts or is designed, for example, like a sleeve.
- the tolerance compensation element 22 has one in comparison the piezoelectric unit 3 similar tolerance-related Elongation behavior on without one on the Position of the valve member 2 acting movement of the To cause deflecting elements 20.
- the tolerance compensation element 20 approximately a length and one Coefficient of thermal expansion of the piezoelectric Actuator 4 on.
- the piezoelectric unit 3 is opposite to that Valve member 2 receiving bore 7 and located therein Fuel sealed, for which a sealing element 25 is provided is, which is designed here as a sealing plate, which in the two-part valve body at this point 6 is stored.
- the sealing plate 25 has for contacting of the deflecting element 20 with the valve member 2 in each case with a sealing device 26, which is an O-ring or Membrane is provided through openings 27. By the passage openings 27 extend on the deflection element 20 provided through bolts 28 into the bore 7.
- valve member 2 For contacting the passage bolts 28 of the deflecting element 20 is the valve member 2 with a plate 29 formed, the diameter of which is essentially that of Deflection elements 20 corresponds.
- the valve member 2 or its plate 29 is not in the activated state of the piezoelectric actuator 4 by an air gap 30 separated from the deflecting element 20.
- This air gap 30 is dimensioned such that at one possible temperature compensation movements of the deflecting element can be compensated by a few micrometers.
- the fuel injection valve 1 according to the figure operates in described below.
- the balance bolts 24 of the Tolerance compensation element 22 in the same way as that piezoelectric actuator 4 so that the deflecting element 20 is not is moved or experiences only a minimal deflection, which is less than the width of the air gap 30. In in any case, this has no effect on the closing and Open position of the valve member 2 and the fuel valve 1 in total.
- valve member 2 has in the force balanced designed fuel injector 1 result in that a valve control piston 33 in the valve control chamber 14 after is moved up and fuel is released by a now Injection nozzle in the combustion chamber, not shown is injected.
Landscapes
- 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)
- Fuel-Injection Apparatus (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Control Of Non-Electrical Variables (AREA)
Description
Claims (13)
- Ventil zum Steuern von Flüssigkeiten, mit einem in einer Bohrung (7) eines Ventilkörpers (6) axial verschiebbaren Ventilglied (2), das an einem Ende ein Ventilschließglied (8) aufweist, das mit einem an dem ventilkörper (6) vorgesehenen Sitz (9, 10) zum Öffnen und Schließen des Ventils (1) zusammenwirkt, mit einer piezoelektrischen Einheit (3) zur Betätigung des Ventilglieds (2), sowie mit einem Toleranzausgleichselement (22) zum Ausgleich von Längungstoleranzen der piezoelektrischen Einheit (3) und/oder weiterer Ventilbauteile (6), dadurch gekennzeichnet, daß die Auslenkung der piezoelektrischen Einheit (3) über ein Umlenkelement (20) auf das Ventilglied (2) übertragbar ist, wobei die piezoelektrische Einheit (3) in Bewegungsrichtung des Ventilglieds (2) mit ihrem Piezokopf (17) diesem zugewandt im wesentlichen innerhalb einer Längserstreckung des Umlenkelements (20) angeordnet ist und mit diesem über das Toleranzausgleichselement (22) verbunden ist, welches parallel zu der piezoelektrischen Einheit (3) angeordnet ist und ein hierzu gleichartiges toleranzbedingtes Längenänderungsverhalten ohne eine auf die Stellung des Ventilglieds (2) einwirkende Bewegung des Umlenkelements (20) aufweist.
- Ventil nach Anspruch 1, dadurch gekennzeichnet, daß das Toleranzausgleichselement (20) wenigstens annähernd eine Länge und einen Temperaturausdehnungskoeffizienten der wenigstens einen piezoelektrischen Aktor (4) umfassenden piezoelektrischen Einheit (3) aufweist.
- Ventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Toleranzausgleichselement (22) einerseits mit dem Piezokopf (17) und andererseits mit einem Auflager (23) an dem Umlenkelement (20) in einem an einen Piezofuß (18) angrenzenden Bereich verbunden ist.
- Ventil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der die piezoelektrische Einheit (3) und das Toleranzausgleichselement (22) umgebende Bereich (21) mit einem eine hohe Wärmeleitfähigkeit aufweisenden Wärmeleitmedium (32) befüllt ist.
- Ventil nach Anspruch 4, dadurch gekennzeichnet, daß das Wärmeleitmedium (32) eine Wärmeleitpaste, insbesondere aus synthetischem Öl, darstellt.
- Ventil nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Toleranzausgleichselement (22) mit sich parallel zu der piezoelektrischen Einheit (3) erstreckenden Ausgleichsbolzen (24) ausgebildet ist, welche einerseits an dem auflagerartig über den Durchmesser der piezoelektrischen Einheit (3) überkragenden Piezokopf (17) befestigt sind.
- Ventil nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Umlenkelement (20) als eine wenigstens teilweise geschlossene und einen Innenraum (21) begrenzende Umlenkhülse ausgebildet ist.
- Ventil nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die piezoelektrische Einheit (3) gegenüber der das Ventilglied (2) aufnehmenden Bohrung (7) abgedichtet ist.
- Ventil nach Anspruch 8, dadurch gekennzeichnet, daß die piezoelektrische Einheit (3) gegenüber der das Ventilglied (2) aufnehmenden Bohrung (7) mittels einem Dichtelement (25) abgedichtet ist, welches zur Kontaktierung des Umlenkelements (20) mit dem Ventilglied (2) wenigstens eine abgedichtete Durchtrittsöffnung (27) aufweist.
- Ventil nach Anspruch 9, dadurch gekennzeichnet, daß das Umlenkelement (20) durch das als Dichtplatte ausgebildete Dichtelement (25) in die das Ventilglied (2) aufnehmende Bohrung (7) reicht, wobei das Umlenkelement (20) im Bereich der wenigstens einen Durchtrittsöffnung (27) durch die Dichtplatte (25) Durchtrittsbolzen (28) aufweist.
- Ventil nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß als Vorspannelement für die piezoelektrische Einheit (3) eine an dem Dichtelement (25) abgestützte Federeinrichtung (31) vorgesehen ist.
- Ventil nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß das Ventilglied (2) zur Kontaktierung mit dem Umlenkelement (20) mit einem Teller (29) ausgebildet ist, dessen Durchmesser im wesentlichen dem des Umlenkelements (20) entspricht.
- Ventil nach einem der Ansprüche 1 bis 12, gekennzeichnet durch seine Verwendung als Bestandteil eines Kraftstoffeinspritzventils für Brennkraftmaschinen, insbesondere eines Common-Rail-Injektors (1).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19946841 | 1999-09-30 | ||
DE19946841A DE19946841A1 (de) | 1999-09-30 | 1999-09-30 | Ventil zum Steuern von Flüssigkeiten |
PCT/DE2000/003226 WO2001023745A1 (de) | 1999-09-30 | 2000-09-16 | Ventil zum steuern von flüssigkeiten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1135595A1 EP1135595A1 (de) | 2001-09-26 |
EP1135595B1 true EP1135595B1 (de) | 2004-12-15 |
Family
ID=7923822
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00975772A Expired - Lifetime EP1135595B1 (de) | 1999-09-30 | 2000-09-16 | Ventil zum steuern von flüssigkeiten |
Country Status (8)
Country | Link |
---|---|
US (1) | US6454239B1 (de) |
EP (1) | EP1135595B1 (de) |
JP (1) | JP2003510508A (de) |
KR (1) | KR100806058B1 (de) |
AT (1) | ATE285034T1 (de) |
CZ (1) | CZ295448B6 (de) |
DE (2) | DE19946841A1 (de) |
WO (1) | WO2001023745A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102979941A (zh) * | 2012-12-13 | 2013-03-20 | 浙江师范大学 | 一种自带传感器的大流量压电叠堆阀 |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19939520C2 (de) * | 1999-08-20 | 2001-06-07 | Bosch Gmbh Robert | Einspritzsystem und Verfahren zum Betreiben eines Einspritzsystems |
ATE292754T1 (de) * | 1999-08-20 | 2005-04-15 | Bosch Gmbh Robert | Ventil zum steuern von flüssigkeiten |
DE10003863B4 (de) * | 2000-01-28 | 2004-11-18 | Robert Bosch Gmbh | Einspritzdüse |
US20030062026A1 (en) * | 2000-09-07 | 2003-04-03 | Friedrich Boecking | Common rail system |
DE10141136A1 (de) * | 2001-04-07 | 2002-10-10 | Continental Teves Ag & Co Ohg | Ventil.insbesondere für hydraulische Kraftfahrzeugbremsen |
DE10122245A1 (de) * | 2001-05-08 | 2002-12-12 | Bosch Gmbh Robert | Leckagereduzierter druckgesteuerter Kraftstoffinjektor |
DE10132249A1 (de) * | 2001-07-04 | 2003-01-23 | Bosch Gmbh Robert | Kraftstoffinjektor mit kraftausgeglichenem Steuerventil |
DE10136186A1 (de) * | 2001-07-25 | 2003-02-06 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE10147483B4 (de) * | 2001-09-26 | 2005-05-19 | Robert Bosch Gmbh | Ventil zum Steuern von Flüssigkeiten |
DE10163731A1 (de) * | 2001-12-21 | 2003-07-10 | Biochip Technologies Gmbh | Piezoaktor |
DE10213858A1 (de) * | 2002-03-27 | 2003-10-30 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE10233906A1 (de) * | 2002-07-25 | 2004-02-19 | Siemens Ag | Einspritzmodul |
DE10345203A1 (de) * | 2003-09-29 | 2005-05-04 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
EP1584815A1 (de) * | 2004-04-05 | 2005-10-12 | Tiby M. Martin | Einspritzventil für einen Hochdruckspeicher |
DE602005005242T2 (de) | 2004-04-26 | 2009-04-02 | Isuzu Motors Ltd. | Längen-Ausgleichselement und dieses enthaltendes Kraftstoff-Einspritzventil |
DE102004026171B4 (de) * | 2004-05-28 | 2010-05-20 | Continental Automotive Gmbh | Einspritzventil |
DE102005025953A1 (de) * | 2005-06-06 | 2006-12-07 | Siemens Ag | Einspritzventil und Ausgleichselement für ein Einspritzventil |
DE102006026381A1 (de) * | 2006-06-07 | 2007-12-13 | Robert Bosch Gmbh | Kraftstoffinjektor mit Druckübersetzer und niederdruckseitig angeordnetem Piezosteller |
US7717132B2 (en) * | 2006-07-17 | 2010-05-18 | Ford Global Technologies, Llc | Hydraulic valve actuated by piezoelectric effect |
US9142751B2 (en) * | 2012-10-10 | 2015-09-22 | Industrial Sonomechanics, Llc | Efficient cooling of piezoelectric transducers |
CN104806403B (zh) * | 2015-04-30 | 2017-05-24 | 哈尔滨工程大学 | 多模式压电式常闭电控单体泵 |
CN104806404B (zh) * | 2015-04-30 | 2017-12-12 | 哈尔滨工程大学 | 双作用压电式常闭电控单体泵 |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
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CH399021A (de) * | 1964-02-19 | 1966-03-31 | Kistler Instrumente Ag | Beschleunigungs-Messgerät |
GB1601306A (en) * | 1978-05-08 | 1981-10-28 | Philips Electronic Associated | Fluidcontrol valve |
DE3237258C1 (de) * | 1982-10-08 | 1983-12-22 | Daimler-Benz Ag, 7000 Stuttgart | Elektrisch vorgesteuerte Ventilanordnung |
DE3533975A1 (de) * | 1985-09-24 | 1987-03-26 | Bosch Gmbh Robert | Zumessventil zur dosierung von fluessigkeiten oder gasen |
JPH0637944B2 (ja) * | 1986-03-14 | 1994-05-18 | エヌオーケー株式会社 | 三方弁 |
US5004945A (en) * | 1988-09-26 | 1991-04-02 | Nippondenso Co., Ltd. | Piezoelectric type actuator |
DE3833093A1 (de) * | 1988-09-29 | 1990-04-12 | Siemens Ag | Fuer verbrennungskraftmaschine vorgesehene kraftstoff-einspritzduese mit steuerbarer charakteristik des kraftstoffstrahls |
ATE192263T1 (de) * | 1990-09-25 | 2000-05-15 | Siemens Ag | Anordnung für einen in hubrichtung wirkenden adaptiven, mechanischen toleranzausgleich für den wegtransformator eines piezoelektrischen aktors |
JP2598434Y2 (ja) * | 1992-12-09 | 1999-08-09 | 株式会社ユニシアジェックス | 超磁歪式アクチュエータ |
US5417142A (en) * | 1992-12-18 | 1995-05-23 | Caterpillar Inc. | Hydraulic amplifier |
DE4306073C1 (de) * | 1993-02-26 | 1994-06-01 | Siemens Ag | Zumeßvorrichtung für Fluide |
JPH06343273A (ja) * | 1993-05-31 | 1994-12-13 | Aisin Seiki Co Ltd | 圧電アクチュエータ |
WO1996038663A1 (en) * | 1995-06-02 | 1996-12-05 | Caterpillar Inc. | Direct operated check injector |
DE19531652A1 (de) * | 1995-08-29 | 1997-05-07 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
DE19538791C2 (de) | 1995-10-18 | 1998-04-09 | Daimler Benz Ag | Piezosteuerventil für Kraftstoffeinspritzanlagen von Brennkraftmaschinen |
JPH109084A (ja) * | 1996-06-24 | 1998-01-13 | Nissan Motor Co Ltd | 圧電式燃料噴射弁 |
JPH10205406A (ja) * | 1997-01-27 | 1998-08-04 | Denso Corp | 燃料噴射弁 |
DE29708546U1 (de) * | 1997-05-14 | 1998-09-10 | FEV Motorentechnik GmbH & Co. KG, 52078 Aachen | Elektrischer Festkörperaktuator mit hydraulischer Übersetzung |
DE19743669A1 (de) * | 1997-10-02 | 1999-04-08 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE19807903C2 (de) | 1998-02-25 | 2001-11-29 | Siemens Ag | Vorrichtung und Verfahren zur Kraftübertragung |
DE19826339A1 (de) * | 1998-06-12 | 1999-12-16 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
DE19835494C2 (de) * | 1998-08-06 | 2000-06-21 | Bosch Gmbh Robert | Pumpe-Düse-Einheit |
DE19849203A1 (de) * | 1998-10-26 | 2000-04-27 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
US6253736B1 (en) * | 1999-08-10 | 2001-07-03 | Cummins Engine Company, Inc. | Fuel injector nozzle assembly with feedback control |
ATE292754T1 (de) * | 1999-08-20 | 2005-04-15 | Bosch Gmbh Robert | Ventil zum steuern von flüssigkeiten |
-
1999
- 1999-09-30 DE DE19946841A patent/DE19946841A1/de not_active Ceased
-
2000
- 2000-09-16 EP EP00975772A patent/EP1135595B1/de not_active Expired - Lifetime
- 2000-09-16 DE DE50008956T patent/DE50008956D1/de not_active Expired - Lifetime
- 2000-09-16 WO PCT/DE2000/003226 patent/WO2001023745A1/de active IP Right Grant
- 2000-09-16 CZ CZ20011878A patent/CZ295448B6/cs not_active IP Right Cessation
- 2000-09-16 US US09/856,792 patent/US6454239B1/en not_active Expired - Fee Related
- 2000-09-16 KR KR1020017006489A patent/KR100806058B1/ko not_active IP Right Cessation
- 2000-09-16 AT AT00975772T patent/ATE285034T1/de not_active IP Right Cessation
- 2000-09-16 JP JP2001527103A patent/JP2003510508A/ja active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102979941A (zh) * | 2012-12-13 | 2013-03-20 | 浙江师范大学 | 一种自带传感器的大流量压电叠堆阀 |
CN102979941B (zh) * | 2012-12-13 | 2014-06-04 | 浙江师范大学 | 一种自带传感器的大流量压电叠堆阀 |
Also Published As
Publication number | Publication date |
---|---|
KR20010101058A (ko) | 2001-11-14 |
ATE285034T1 (de) | 2005-01-15 |
CZ295448B6 (cs) | 2005-08-17 |
EP1135595A1 (de) | 2001-09-26 |
US6454239B1 (en) | 2002-09-24 |
JP2003510508A (ja) | 2003-03-18 |
DE50008956D1 (de) | 2005-01-20 |
WO2001023745A1 (de) | 2001-04-05 |
DE19946841A1 (de) | 2001-05-03 |
KR100806058B1 (ko) | 2008-02-21 |
CZ20011878A3 (cs) | 2002-03-13 |
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