EP1079101A2 - Soupape de commande de fluides - Google Patents

Soupape de commande de fluides Download PDF

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Publication number
EP1079101A2
EP1079101A2 EP00115980A EP00115980A EP1079101A2 EP 1079101 A2 EP1079101 A2 EP 1079101A2 EP 00115980 A EP00115980 A EP 00115980A EP 00115980 A EP00115980 A EP 00115980A EP 1079101 A2 EP1079101 A2 EP 1079101A2
Authority
EP
European Patent Office
Prior art keywords
valve
membrane
piezo actuator
controlling liquids
piston
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.)
Withdrawn
Application number
EP00115980A
Other languages
German (de)
English (en)
Other versions
EP1079101A3 (fr
Inventor
Friedrich Boecking
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1079101A2 publication Critical patent/EP1079101A2/fr
Publication of EP1079101A3 publication Critical patent/EP1079101A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • F02M2200/701—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger mechanical

Definitions

  • the invention relates to a valve for controlling liquids according to the genus of patent claim 1.
  • Such a valve is described in EP 0 477 400 A1.
  • Actuating piston of the valve member in part of the stepped bore slidably arranged with a small diameter.
  • a larger piston is movable by a piezo actuator in part of the stepped bore with a larger diameter arranged.
  • Between the two pistons is one with one Hydraulic pressure chamber filled with pressure medium, so that a hydraulic translation of a movement of the Piezo actuator takes place. That is, if the larger piston moved by the piezo actuator by a certain distance the actuating piston of the valve member makes one around the ratio of the piston diameters increased stroke because the piston of the piezo actuator has a larger area than the actuating piston of the valve member having.
  • valve member Actuating piston of the valve member by the Piezo actuator moving pistons and the piezo actuator on one common axis in a row.
  • the problem with such valves is that the two Piston of the hydraulic translator of a certain friction when moving in and opposite to the stroke direction are subjected, so that a concomitant Wear occurs.
  • the valve according to the invention with the characteristic features of claim 1 has the advantage that a mechanical translator with a membrane is used which is a low-friction and wear-free Solution enables.
  • a mechanical translator with membrane in contrast to Using a hydraulic translator is not the problem with regard to the leakage losses of the hydraulic medium in the Pressure chamber of a hydraulic translator.
  • a mechanical translator with membrane simple constructed and inexpensive to manufacture, so that also advantages in this regard with regard to a hydraulic Translators result.
  • the membrane is designed as a bending beam. This allows the stroke of the piezo actuator in a simple form are transferred to the piston element of the valve member. In addition, there is a very great deal with the bending beam principle precise power transmission possible, which in turn enables exactly defined injection timing and / or injection quantity of fuel is guaranteed.
  • the membrane is advantageous articulated on a support, preferably a bearing ring stored.
  • a support preferably a bearing ring stored.
  • valve sealing spring is assigned to the valve member.
  • Valve sealing spring can be omitted. This is according to Claim 6 the membrane in the direction of Preloaded closed position of the valve member. With others Words, the membrane takes over the function of the well-known Valve sealing spring.
  • the piezo actuator To temperature drifts of the piezo actuator and the associated to compensate for incorrect stroke transmissions to the valve member, is at least the piezo actuator according to claim 7 a compensation element assigned, which the stroke of the Piezo actuator transfers to a lever arm of the membrane.
  • FIG. 1 the valve according to the invention is used in an injection system, where the injection pump and the injector forms a unit (so-called pump-nozzle unit (PDE)).
  • PDE pump-nozzle unit
  • FIG. 1 represented schematically.
  • the injection valve 1 comprises a control unit 2, which in turn is in a housing 3 arranged piezo actuator 4.
  • the piezo actuator 4 supports 1 here at its lower end against that Housing 3 from.
  • the upper end of the piezo actuator 4 in FIG. 1 is connected to a piston 5 by a Preload element 6, such as a coil spring, not in the energized state of the piezo actuator 4 in its rest position is biased.
  • a Preload element 6 such as a coil spring
  • the piston 5 is also provided with two compensating elements 7, 8 connected, which is parallel to the long side of the Piezo actuator 4 extend.
  • These two balancing elements 7, 8 in Fig. 1 are two bolts which are the same effective length 1 as the piezo actuator 4.
  • the compensating elements 7, 8 are at their ends opposite the piston 5 each connected to an L-piece 9, 10, the short one Leg in Fig. 1 is directed inwards.
  • the short legs of the L-pieces 9, 10 can with a Membrane 11 come into contact, which via a support, preferably a bearing ring 12 articulated on the housing 3 is stored.
  • the membrane 11 is designed as a bending beam and has an opening in the center into which the piston 13 of a valve member 13 engages.
  • Thermally conductive material 15 which for temperature compensation between the piezo actuator 4 and the two Compensating elements 7, 8 is used.
  • the reason for that Temperature compensation can be seen in the fact that both the two compensating elements 7, 8 and the piezo actuator 4 in Depending on the ambient temperature, expand or contract. Now temperature differences occur on Piezo actuator 4 and the two compensating elements 7, 8, this leads to different expansion sizes of these Elements, which is inaccuracy regarding the Injection quantity and the injection timing of the fuel precipitates.
  • the heat conducting medium 15 is used to ensure that the external temperature influences on the piezo actuator 4 and the compensating elements 7, 8 essentially are balanced.
  • the above Avoiding the problem becomes a material for the compensating elements selected, which essentially the same coefficient of thermal expansion as the piezo actuator 4 having.
  • the gap S serves as a third measure the same purpose.
  • the gap S compensates for differences in expansion due to external influences, such as the Temperature, from piezo actuator 4 and compensating elements 7, 8. That is, despite different lengths get between piezo actuator and compensating elements 7, 8 the L-pieces 9, 10 in contact with the membrane 11, immediately when the piezo actuator 4 is energized and thus a stroke against the bias of the Preload element 6 causes.
  • Valve 1 for controlling liquids becomes the linear expansion of the piezo actuator 4 against the piston 5 the biasing force transmitted by the biasing element 6. But also move together with the piston 5 Compensating elements 7, 8 in Fig. 1 upwards, whereby the membrane 11 by means of the short ends of the L-pieces 9, 10 bent upwards at its two outer ends in FIG. 1 becomes.
  • the bearing ring 12 is the central area in FIG Membrane 11 corresponding to a bending beam downwards cocked so that the piston 13 of the valve member 14 in Valve 15 is moved down. So that leads Valve member 14 moves from first valve seat 16 in the second valve seat 17.
  • valve 15 Below the valve 15 is the control chamber in FIG. 1 18 and the control piston 19, which in general known form cooperate with the valve 15 and therefore, on these components and how they work not detailed.
  • Fig. 2 is the area between the compensation element again in detail 8 with L-piece 10 and membrane 11 with bearing ring 12 shown. From this figure it can be seen that the short leg of the L-piece 10 at its the Diaphragm 11 facing side is spherical to a precise interaction between the two elements 11, 10 and thus a precise stroke transmission from the piezo actuator 4 ensure on the membrane 11. From this figure is but also evident that the membrane in connection with the bearing ring 12 spans two lever arms A and B, which determine a gear ratio. In other words, the stroke of the piezo actuator 4 is multiplied by the Transfer ratio A / B to the piston 13. This has a translation range of 1: 2 to 1: 8 turned out to be particularly preferred.
  • Fig. 2 can be seen that the L-piece 10 over a Thread is connected to the compensating element 8.
  • This Connection enables on the one hand an exchange of the L-piece, for example, in the event of damage other than on use dimensioned L-pieces, if the requirements so require.
  • the compensating element 8 can also be designed in one piece with the L-piece 10.
  • Fig. 3 is a second embodiment of the invention Valve 1 shown for controlling liquids. After the construction of the embodiment according to 3 is essentially the same as that of FIG. 1, only the differences to the Embodiment of Fig. 1 explained.
  • the piezo actuator 4 In the idle state of the membrane 11, the piezo actuator 4 is energized.
  • the piezo actuator 4 is switched off, so that it is 3, the piston 5 of the piezo actuator 4 and, with it, the compensating elements 7, 8 and extensions 20, 21 are moved downward in the direction of the prestressing force of the prestressing element 6 and bend the outer ends of the membrane 11 in FIG. 3
  • the region of the membrane 11 located between the first bearing ring 12 and the second bearing ring 22 moves upward according to a bending beam as a result of the membrane being supported on the second bearing ring 22.
  • This movement is then converted into a region in the region between the piston 13 and the first bearing ring 12 3 is transformed downward, so that the piston 3 and associated valve member move downward in Fig. 3.
  • the membrane according to Fig. 3 represents a simple bending beam
  • the membrane according to FIG. 3 acts as a double bending beam.
  • Fig. 4 shows a third embodiment of the valve 1 according to the invention for controlling Liquids.
  • This embodiment differs differs from that of FIG. 3 in that only one Bearing ring 23 is provided, on which the membrane 11th through the compensating elements 7, 8 together with extensions 20, 21 is biased.
  • a spring 24 presses in the area between piston 13 and bearing ring 23 on the membrane 11 in Direction of the rest position of the membrane 11.
  • the Piezo actuator 4 energized according to the third embodiment or activated, it performs a lifting movement in FIG. 4 counter to the biasing force of the biasing elements 6 up out.
  • the Piezo actuator 4 energized according to the third embodiment or activated, it performs a lifting movement in FIG. 4 counter to the biasing force of the biasing elements 6 up out.
  • Compensating elements 7, 8 together with extensions 20, 21 in Fig. 4 moves upward, so that the membrane 11 in the direction of Bias force of the spring 24 can dodge down whereby in turn the piston 13 together with the valve member Can perform movement in the valve seat.
  • the present invention can of course also be used differently designed valves with mechanical translator be used.

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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)
  • Fuel-Injection Apparatus (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
EP00115980A 1999-08-20 2000-07-26 Soupape de commande de fluides Withdrawn EP1079101A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19939476 1999-08-20
DE1999139476 DE19939476C2 (de) 1999-08-20 1999-08-20 Ventil zum Steuern von Flüssigkeiten

Publications (2)

Publication Number Publication Date
EP1079101A2 true EP1079101A2 (fr) 2001-02-28
EP1079101A3 EP1079101A3 (fr) 2003-03-05

Family

ID=7918995

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00115980A Withdrawn EP1079101A3 (fr) 1999-08-20 2000-07-26 Soupape de commande de fluides

Country Status (2)

Country Link
EP (1) EP1079101A3 (fr)
DE (1) DE19939476C2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002092993A1 (fr) * 2001-05-12 2002-11-21 Robert Bosch Gmbh Soupape de commande de liquides
WO2002093002A1 (fr) * 2001-05-12 2002-11-21 Robert Bosch Gmbh Soupape de regulation de liquides
WO2003033905A1 (fr) * 2001-10-10 2003-04-24 Robert Bosch Gmbh Soupape d'injection de carburant
EP1473460B1 (fr) * 1999-10-15 2007-09-12 Westport Power Inc. Injecteur actionné directement
DE102010051742A1 (de) 2010-11-19 2012-05-24 Christoph Miethke Hebelventil mit Piezo-Aktor-Antrieb
CN115182407A (zh) * 2022-07-13 2022-10-14 中联重科股份有限公司 用于控制臂架的方法、装置、控制器及工程机械

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10141135A1 (de) * 2001-02-22 2002-09-05 Continental Teves Ag & Co Ohg Ventil, insbesondere für hydraulische Kraftfahrzeug-Bremsanlagen
DE10141136A1 (de) * 2001-04-07 2002-10-10 Continental Teves Ag & Co Ohg Ventil.insbesondere für hydraulische Kraftfahrzeugbremsen
US7055796B2 (en) 2001-02-22 2006-06-06 Continental Teves Ag & Co. Ohg Valve, especially for hydraulic automotive brake systems
DE10123174B4 (de) * 2001-05-12 2005-04-07 Robert Bosch Gmbh Ventil zum Steuern von Flüssigkeiten
DE102008001142A1 (de) 2008-04-14 2009-10-15 Zf Friedrichshafen Ag Steuerventil mit einem piezoelektrischen Aktuator
DE102008001647A1 (de) 2008-05-08 2009-11-12 Zf Friedrichshafen Ag Steuerventil

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3116687C2 (de) * 1981-04-28 1983-05-26 Daimler-Benz Ag, 7000 Stuttgart Elektrisch angesteuertes Stellglied
US4695034A (en) * 1984-11-27 1987-09-22 Stec Inc. Fluid control device
JPS62157274A (ja) * 1985-12-28 1987-07-13 Aisan Ind Co Ltd 燃料噴射弁
DE3713697A1 (de) * 1987-04-24 1988-11-10 Licentia Gmbh Ultraschnelles steuerventil
EP0477400B1 (fr) * 1990-09-25 2000-04-26 Siemens Aktiengesellschaft Dispositif compensateur de tolérance dans la direction de mouvement du transformateur de déplacement d'un dispositif d'actionnement piézoélectrique
DE4228214A1 (de) * 1991-09-27 1993-04-01 Siemens Ag Linearhebel-wegtransformator fuer den piezoelektrischen aktor eines einlassventils
DE19538791C2 (de) * 1995-10-18 1998-04-09 Daimler Benz Ag Piezosteuerventil für Kraftstoffeinspritzanlagen von Brennkraftmaschinen
JP3740733B2 (ja) * 1996-02-13 2006-02-01 いすゞ自動車株式会社 内燃機関の燃料噴射装置
EP0931358B1 (fr) * 1996-09-30 2002-02-27 Siemens Aktiengesellschaft Organe de reglage comportant un actionneur a longueur reglable et dispositif pour la transmission du deplacement d'un actionneur
DE19909539C2 (de) * 1999-03-04 2001-02-08 Siemens Ag Stellantrieb für einen Kraftstoffinjektor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1473460B1 (fr) * 1999-10-15 2007-09-12 Westport Power Inc. Injecteur actionné directement
WO2002092993A1 (fr) * 2001-05-12 2002-11-21 Robert Bosch Gmbh Soupape de commande de liquides
WO2002093002A1 (fr) * 2001-05-12 2002-11-21 Robert Bosch Gmbh Soupape de regulation de liquides
WO2003033905A1 (fr) * 2001-10-10 2003-04-24 Robert Bosch Gmbh Soupape d'injection de carburant
US7032833B2 (en) 2001-10-10 2006-04-25 Robert Bosch Gmbh Fuel injection valve
DE102010051742A1 (de) 2010-11-19 2012-05-24 Christoph Miethke Hebelventil mit Piezo-Aktor-Antrieb
CN115182407A (zh) * 2022-07-13 2022-10-14 中联重科股份有限公司 用于控制臂架的方法、装置、控制器及工程机械
CN115182407B (zh) * 2022-07-13 2023-09-12 中联重科股份有限公司 用于控制臂架的方法、装置、控制器及工程机械

Also Published As

Publication number Publication date
DE19939476C2 (de) 2003-02-20
DE19939476A1 (de) 2001-04-05
EP1079101A3 (fr) 2003-03-05

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