EP1135594B1 - Ventil zum steuern von flüssigkeiten - Google Patents
Ventil zum steuern von flüssigkeiten Download PDFInfo
- Publication number
- EP1135594B1 EP1135594B1 EP00974319A EP00974319A EP1135594B1 EP 1135594 B1 EP1135594 B1 EP 1135594B1 EP 00974319 A EP00974319 A EP 00974319A EP 00974319 A EP00974319 A EP 00974319A EP 1135594 B1 EP1135594 B1 EP 1135594B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- piezoelectric actuator
- hydraulic
- chamber
- hydraulic chamber
- 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
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S137/00—Fluid handling
- Y10S137/906—Valves biased by fluid "springs"
Definitions
- the invention relates to a valve for controlling liquids according to the preamble of claim 1.
- a valve of this type which via a piezoelectric actuator is actuated, already known.
- This known valve has an arrangement for one adaptive mechanical tolerance compensation acting in the stroke direction 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 between two bounding it Pistons, one of which is a piston with a smaller diameter is formed and with a valve member to be controlled is connected and the other piston with a larger one Diameter is formed and with the piezoelectric Actuator is connected, 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 increased by the ratio of the piston diameter Stroke makes when the larger piston by the piezoelectric Actuator is moved by a certain distance.
- the valve member, the pistons and the piezoelectric actuator lie one behind the other on a common axis.
- Tolerances can be set via the compensation volume of the hydraulic chamber due to temperature gradients in the component or different coefficients of thermal expansion of the used materials and any setting effects compensated without changing the position of the valve element to be controlled occurs.
- a piezoelectric Actuator is made up of several thin layers, to achieve the largest possible stroke. So that this Layers when the piezoelectric actuator is energized the piezoelectric actuator must not separate be biased, the force to be applied can be approximately 1000 N.
- the invention has for its object a valve for Control of liquids by creating the preload of a piezoelectric actuator and tolerance compensation with little space requirement with a simple construction is realized with as few components as possible.
- valve according to the invention for controlling liquids with the characterizing features of claim 1 the advantage that with the trained as a hydraulic spring Hydraulic chamber is also a biasing element for the piezoelectric actuator and a compensation element for in particular Temperature-related elongation tolerances realized is.
- the preload is hydraulic and with low actuator Space requirements shown, with the omission of springs or other mechanical biasing elements a desired slim design of the entire valve is possible.
- An important advantage of the invention is furthermore in that by dimensioning the hydraulic chamber, the hydraulic spring and the piston immersed in it Overall system rigidity can be increased. Since the Rigidity of the hydraulic spring from the cross-sectional area of the piston is dependent on the same pressure Rigidity of the hydraulic spring and thus the preload be increased to the piezoelectric actuator if the cross-sectional area of the immersed in the hydraulic chamber Piston is increased accordingly.
- a disadvantageous change in length can also occur with a high spring rate of the entire facility can be avoided if the piezoelectric actuator, the valve member or the valve body its length e.g. changes when heated.
- Second is in the case of dynamic actuation, the rigidity of the hydraulic Spring on which the piston is supported, the larger, the larger the diameter of the piston is chosen. This also has the advantage that the stroke losses of Remove the piston with increasing diameter.
- the first embodiment shown in Figure 1 shows a use of the valve according to the invention a fuel injection valve 1 for internal combustion engines of motor vehicles.
- the fuel injection valve 1 is designed here as a common rail injector.
- an injection duration and an injection quantity over force relationships in the Fuel injection valve 1 becomes a valve member 2 controlled a piezoelectric actuator 3, which on the Combustion chamber side of the valve member 2 in one Piezo chamber 4 is arranged.
- the piston-shaped valve member 2 is axially displaceable in a bore 5 of a valve body designed as a longitudinal bore 6 arranged and has on its combustion chamber side End a spherical, forming a valve closing member Valve head 7 on.
- the valve head 7 acts with one on the Valve body 6 formed seat 8 together, in the lifted State of the valve head 7 a connection to one Spring chamber 9 with a restoring force on the outside opening valve head 7 exerting spring 10 is produced.
- An outlet throttle is connected to the spring chamber 9 on the combustion chamber side 11 leading to a valve control chamber 12, in which an injection line only indicated symbolically in FIG. 1 13 flows, which in turn from one for all Fuel injectors common high pressure storage space (Common Rail) 14 leads away.
- the high-pressure storage space 14 thereby in a known manner from a high-pressure fuel delivery pump with high pressure fuel from a storage tank filled.
- the piezoelectric actuator 3 is made of several layers built and points on its combustion chamber facing side an actuator head 15 and on its combustion chamber facing away Page up an actuator foot 16.
- On the actuator head 15 is a Adjusted piston 17 attached, which from the piezo chamber 4 by a support 18 for the actuator head 15 on the combustion chamber side Wall of the piezo chamber 4 in the longitudinal bore 5 enough in which the valve member 2 is mounted. It is the piezo chamber 4 in the area of the actuating piston 17 opposite the longitudinal bore 5 sealed with a sealing device 19.
- the actuator base 16 is fixed with a further piston 20 connected, which dips into a hydraulic chamber 21, which on the side of the piezoelectric element facing away from the valve member 2 Actuator 3 in the installed position of the fuel injector 1 is arranged above the piezo chamber 4. It is the piezo chamber 4 via a further sealing device 22 in the Area of the piston 20 leading into the hydraulic chamber 21 sealed against this.
- the substantially closed hydraulic chamber 21 is with the pressure medium contained in it, which consists of a Low pressure source with a compared to the pressure level of the High pressure storage space 14 is supplied relaxed pressure designed as a hydraulic spring, which has a the valve body 6 formed hydraulic line 23 with the the valve member 2 containing longitudinal bore 5 is connected.
- the hydraulic spring has a dual function because on the one hand it serves as a biasing element of the piezoelectric Actuator 3 and on the other hand it is a tolerance compensation element.
- the fuel injection valve 1 according to FIG. 1 works here in the manner described below.
- the preload of the piezoelectric actuator 3 on the diameter of the piston 20 can be set, the largest possible piston diameter is advantageous.
- a piston diameter of 14 mm is sufficient to a preload of 1000 N at a system pressure of 65 bar to achieve.
- the specialist can do this deviating values selected for the individual case can be selected.
- the piston 20 penetrates into the compensation volume with an increase in temperature the hydraulic chamber 21 or pulls when the temperature drops, it returns without the effects to the closing and opening position of the valve member 2 and the fuel valve 1 in total.
- the piezoelectric actuator 3 When an injection by the fuel injection valve 1 is to take place, the piezoelectric actuator 3 is energized, whereby this suddenly increases its axial extent. With such a rapid actuation of the piezoelectric Actuator 3 is based on the support 18th and with the piston 20 projecting into the hydraulic chamber 21 the hydraulic spring, consequently hydraulic medium from the hydraulic chamber 21 via the hydraulic line 23 in the longitudinal bore 5 of the valve member 2 is shifted, whereby the valve head 7 of the valve member 2 of his Seat 8 lifts off into an open position.
- the increased rigidity due to a relatively large dimension Diameter of the piston 20 positive.
- FIG. 2 is a second embodiment of the fuel injector 1 shown in the components that have the same function for reasons of clarity with the reference numerals used in Figure 1 are.
- the fuel injection valve 1 shown here that the volume of the interacting with the piezoelectric actuator 3 Hydraulic chamber 21 is externally changeable.
- a schematically illustrated screw in a bore 25 is provided, which is positioned such that the set screw 24 in the hydraulic chamber if necessary 21 can be screwed in so that the compensation volume depending on the change in the position of the adjusting screw 24 reduced or is enlarged.
- the Stiffness of the compensation volume is inversely proportional to volume.
- the adjusting screw 24 thus enables an external readjustment of the injection quantity by correction of the compensation volume in the hydraulic chamber 21.
- the sealing device 22 also here the function, the piezoelectric actuator 3 in front of one any water contained in the hydraulic medium and harmful particles such as To protect chips.
- the hydraulic line 23 opens here into the annular chamber 26, which communicates with the hydraulic chamber 21 via an annular gap 27 connected is.
- a filling surface 28 molded.
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 (10)
- Ventil zum Steuern von Flüssigkeiten, mit einem in einer Bohrung (5) eines Ventilkörpers (6) axial verschiebbaren Ventilglied (2), das an einem Ende einen ein Ventilschließglied bildenden Ventilkopf (7) aufweist, der mit einem an dem Ventilkörper (6) vorgesehenen Sitz (8) zum Öffnen und Schließen des Ventils (1) zusammenwirkt, und mit einem piezoelektrischen Aktor (3) zur Betätigung des Ventilglieds (2), wobei ein Vorspannelement (21) für den piezoelektrischen Aktor (3) und ein Toleranzausgleichselement (21) zum Ausgleich von Längungstoleranzen des piezolektrischen Aktors (3) und/oder weiterer Ventilbauteile (2, 6) vorgesehen ist, dadurch gekennzeichnet, daß auf einer dem Ventilglied (2) abgewandten Seite des piezoelektrischen Aktors (3) eine Hydraulikkammer (21) vorgesehen ist, die über wenigstens eine Hydraulikleitung (23) mit der gegenüber dem piezoelektrischen Aktor (3) abgedichteten Bohrung (5) des Ventilglieds (2) verbunden ist und in die ein mit dem piezoelektrischen Aktor (3) verbundener Kolben (20) eintauchbar ist, wobei die Hydraulikkammer (21) als hydraulische Feder ausgebildet ist, welche mit ihrer Federkraft auf den mit dem piezoelektrischen Aktor (3) verbundenen Kolben (20) das Vorspannelement und das Toleranzausgleichselement darstellt.
- Ventil nach Anspruch 1, dadurch gekennzeichnet, daß der piezoelektrische Aktor (3) zwischen der hydraulischen Feder, die mittels eines Hydraulikmediums aus einer Niederdruckquelle in der Hydraulikkammer (21) gebildet ist, und einem Auflager (18) an einer der Hydraulikkammer (21) abgewandten Seite einer den piezoelektrischen Aktor (3) aufnehmenden Piezokammer (4) verspannt ist.
- Ventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der piezoelektrische Aktor (3) mit einem an einem Aktorkopf (15) befestigten Stellkolben (17) in die gegenüber dem piezoelektrischen Aktor (3) abgedichtete, das Ventilglied (2) aufnehmende Bohrung (5) reicht.
- Ventil nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Hydraulikkammer (21) gegenüber dem piezoelektrischen Aktor (3) im Bereich des Kolbens (20) mittels einer Dichteinrichtung (22) abgedichtet ist, welche in einem Ringspalt (27) zwischen der Hydaulikkammer (21) und der Piezokammer (4) angeordnet ist.
- Ventil nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Hydraulikkammer (21) gegenüber dem piezoelektrischen Aktor (3) mittels einer Dichteinrichtung (22) abgedichtet ist, welche im Bereich der Piezokammer (4) angeordnet ist und eine Ringkammer (26) mit dem Durchmesser der Piezokammer (4) von dieser abtrennt, wobei die Hydraulikleitung (23) in die über einen Ringspalt (27) mit der Hydraulikkammer (21) verbundene Ringkammer (26) mündet.
- Ventil nach Anspruch 5, dadurch gekennzeichnet, daß im Bereich des Ringspaltes (27) an dem Kolben (20) eine Befüllfläche (28) ausgebildet ist.
- Ventil nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Volumen der Hydraulikkammer (21) mittels einer extern bedienbaren Justiereinrichtung (24) veränderbar ist.
- Ventil nach Anspruch 7, dadurch gekennzeichnet, daß die Justiereinrichtung als eine Stellschraube (24) ausgebildet ist, welche in das Hydraulikmedium der Hydraulikkammer (21) eintauchend schraubbar ist.
- Ventil nach einem der Ansprüche 1 bis 8, gekennzeichnet durch seine Verwendung als Bestandteil eines Kraftstoffeinspritzventils für Brennkraftmaschinen, insbesondere eines Common-Rail-Injektors (1).
- Ventil nach Anspruch 9, dadurch gekennzeichnet, daß das Hydraulikmedium zur Befüllung der Hydraulikkammer (21) Kraftstoff darstellt.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19946840A DE19946840A1 (de) | 1999-09-30 | 1999-09-30 | Ventil zum Steuern von Flüssigkeiten |
DE19946840 | 1999-09-30 | ||
PCT/DE2000/003200 WO2001023744A1 (de) | 1999-09-30 | 2000-09-14 | Ventil zum steuern von flüssigkeiten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1135594A1 EP1135594A1 (de) | 2001-09-26 |
EP1135594B1 true EP1135594B1 (de) | 2004-12-01 |
Family
ID=7923821
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00974319A Expired - Lifetime EP1135594B1 (de) | 1999-09-30 | 2000-09-14 | Ventil zum steuern von flüssigkeiten |
Country Status (8)
Country | Link |
---|---|
US (1) | US6502803B1 (de) |
EP (1) | EP1135594B1 (de) |
JP (1) | JP2003510507A (de) |
KR (1) | KR20010101060A (de) |
AT (1) | ATE283973T1 (de) |
CZ (1) | CZ20011881A3 (de) |
DE (2) | DE19946840A1 (de) |
WO (1) | WO2001023744A1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19946869A1 (de) * | 1999-09-30 | 2001-04-05 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE10003863B4 (de) * | 2000-01-28 | 2004-11-18 | Robert Bosch Gmbh | Einspritzdüse |
US6789965B2 (en) * | 2002-05-31 | 2004-09-14 | Agilent Technologies, Inc. | Dot printer with off-axis loading |
DE10254985A1 (de) * | 2002-11-26 | 2004-06-03 | Robert Bosch Gmbh | Ventil zum Steuern von Flüssigkeiten mit einem Düsen- und einem Steuermodul |
DE10326259A1 (de) * | 2003-06-11 | 2005-01-05 | Robert Bosch Gmbh | Injektor für Kraftstoff-Einspritzsysteme von Brennkraftmaschinen, insbesondere von direkteinspritzenden Dieselmotoren |
DE102004002299A1 (de) * | 2004-01-16 | 2005-08-04 | Robert Bosch Gmbh | Kraftstoffinjektor mit direkt angesteuertem Einspritzventilglied |
DE102007002758A1 (de) * | 2006-04-04 | 2007-10-11 | Robert Bosch Gmbh | Kraftstoffinjektor |
WO2009006318A1 (en) | 2007-06-29 | 2009-01-08 | Artificial Muscle, Inc. | Electroactive polymer transducers for sensory feedback applications |
US20090250021A1 (en) * | 2007-10-02 | 2009-10-08 | Artificial Muscle, Inc. | Fluid control systems employing compliant electroactive materials |
EP2239793A1 (de) | 2009-04-11 | 2010-10-13 | Bayer MaterialScience AG | Elektrisch schaltbarer Polymerfilmaufbau und dessen Verwendung |
US8500036B2 (en) | 2010-05-07 | 2013-08-06 | Caterpillar Inc. | Hydraulically amplified mechanical coupling |
WO2012118916A2 (en) | 2011-03-01 | 2012-09-07 | Bayer Materialscience Ag | Automated manufacturing processes for producing deformable polymer devices and films |
WO2012129357A2 (en) | 2011-03-22 | 2012-09-27 | Bayer Materialscience Ag | Electroactive polymer actuator lenticular system |
JP2012202251A (ja) * | 2011-03-24 | 2012-10-22 | Denso Corp | インジェクタ |
EP2828901B1 (de) | 2012-03-21 | 2017-01-04 | Parker Hannifin Corporation | Rolle-an-rolle-herstellungsverfahren zur herstellung selbstheilender elektroaktiver polymervorrichtungen |
US9761790B2 (en) | 2012-06-18 | 2017-09-12 | Parker-Hannifin Corporation | Stretch frame for stretching process |
US9590193B2 (en) | 2012-10-24 | 2017-03-07 | Parker-Hannifin Corporation | Polymer diode |
US10281055B2 (en) * | 2016-02-09 | 2019-05-07 | Parker-Hannifin Corporation | Hydraulic servo valve |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4529164A (en) * | 1982-03-05 | 1985-07-16 | Nippon Soken, Inc. | Piezo-type valve |
DE3237258C1 (de) * | 1982-10-08 | 1983-12-22 | Daimler-Benz Ag, 7000 Stuttgart | Elektrisch vorgesteuerte Ventilanordnung |
DE3533085A1 (de) * | 1985-09-17 | 1987-03-26 | Bosch Gmbh Robert | Zumessventil zur dosierung von fluessigkeiten oder gasen |
DE3713697A1 (de) * | 1987-04-24 | 1988-11-10 | Licentia Gmbh | Ultraschnelles steuerventil |
US4907748A (en) * | 1988-08-12 | 1990-03-13 | Ford Motor Company | Fuel injector with silicon nozzle |
US5092360A (en) * | 1989-11-14 | 1992-03-03 | Hitachi Metals, Ltd. | Flow rated control valve using a high-temperature stacked-type displacement device |
EP0477400B1 (de) * | 1990-09-25 | 2000-04-26 | Siemens Aktiengesellschaft | Anordnung für einen in Hubrichtung wirkenden adaptiven, mechanischen Toleranzausgleich für den Wegtransformator eines piezoelektrischen Aktors |
US5779149A (en) * | 1996-07-02 | 1998-07-14 | Siemens Automotive Corporation | Piezoelectric controlled common rail injector with hydraulic amplification of piezoelectric stroke |
DE19702066C2 (de) * | 1997-01-22 | 1998-10-29 | Daimler Benz Ag | Piezoelektrischer Injektor für Kraftstoffeinspritzanlagen von Brennkraftmaschinen |
DE19727992C2 (de) * | 1997-07-01 | 1999-05-20 | Siemens Ag | Ausgleichselement zur Kompensation temperaturbedingter Längenänderungen von elektromechanischen Stellsystemen |
-
1999
- 1999-09-30 DE DE19946840A patent/DE19946840A1/de not_active Ceased
-
2000
- 2000-09-14 EP EP00974319A patent/EP1135594B1/de not_active Expired - Lifetime
- 2000-09-14 AT AT00974319T patent/ATE283973T1/de not_active IP Right Cessation
- 2000-09-14 CZ CZ20011881A patent/CZ20011881A3/cs unknown
- 2000-09-14 US US09/856,837 patent/US6502803B1/en not_active Expired - Fee Related
- 2000-09-14 DE DE50008830T patent/DE50008830D1/de not_active Expired - Lifetime
- 2000-09-14 JP JP2001527102A patent/JP2003510507A/ja active Pending
- 2000-09-14 KR KR1020017006491A patent/KR20010101060A/ko not_active Application Discontinuation
- 2000-09-14 WO PCT/DE2000/003200 patent/WO2001023744A1/de not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
JP2003510507A (ja) | 2003-03-18 |
US6502803B1 (en) | 2003-01-07 |
CZ20011881A3 (cs) | 2002-04-17 |
WO2001023744A1 (de) | 2001-04-05 |
DE50008830D1 (de) | 2005-01-05 |
KR20010101060A (ko) | 2001-11-14 |
DE19946840A1 (de) | 2001-05-03 |
ATE283973T1 (de) | 2004-12-15 |
EP1135594A1 (de) | 2001-09-26 |
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