WO2006103266A1 - Systeme capteur de reglage, capteur de reglage et unite de commande et procede pour assurer la commande du capteur de reglage - Google Patents

Systeme capteur de reglage, capteur de reglage et unite de commande et procede pour assurer la commande du capteur de reglage Download PDF

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Publication number
WO2006103266A1
WO2006103266A1 PCT/EP2006/061165 EP2006061165W WO2006103266A1 WO 2006103266 A1 WO2006103266 A1 WO 2006103266A1 EP 2006061165 W EP2006061165 W EP 2006061165W WO 2006103266 A1 WO2006103266 A1 WO 2006103266A1
Authority
WO
WIPO (PCT)
Prior art keywords
piezoelectric element
control unit
piezoelectric
operating mode
injection valve
Prior art date
Application number
PCT/EP2006/061165
Other languages
German (de)
English (en)
Inventor
Sven Eisen
Jürgen Rink
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2006103266A1 publication Critical patent/WO2006103266A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors

Definitions

  • Positioner system Positioner system, positioner as well as control unit and method for controlling the positioner
  • the invention relates to a positioning element system, in particular an injection system for an internal combustion engine, sensor with an actuating ⁇ comprising a piezoelectric actuator.
  • the invention further relates to a positioning element, in particular an injection valve with a piezoelectric actuator and a control unit and a procedural ⁇ ren for driving the positioning element.
  • Positioners are often formed by means of piezoelectric actuators, which generate an adjusting movement, in particular a switching stroke or a travel.
  • the use of piezo actuators has the advantage that they have very short switching times and lower energy consumption compared to conventional magnetic drives.
  • the travel of a piezoelectric actuator is small due to its limited length and its electrical parameters.
  • the piezoelectric actuator In the case of the use of such an actuator for an injection valve in a Brennkraftma ⁇ machine, the piezoelectric actuator must be designed so that the travel over the entire temperature range is available to a sufficient degree. Must continue to have piezoelectric actuators, which also compensates over its entire operating period a longitudinal drift and the possibly counteracted schrangn to the function of the injection valve permanently ge ⁇ .
  • Positioner for such a positioner system to provide. It is another object of the present invention to provide a method for controlling a positioning element with reduced over-sizing is available, wherein the actuating stroke can be ensured over the entire life and particular Be ⁇ operating states.
  • a positioner system in particular an injection system for an internal combustion engine
  • the positioner system has a position indicator, in particular an injection valve, which comprises a first piezoelement and a second piezoelement.
  • the first and the second piezo element are so arranged to each other ⁇ that add their adjustment movements at a control.
  • the position encoder system further has a control unit, which is connected to the control with the first and with the second piezoelectric element. In a first operating mode, the control unit activates only the first piezoelectric element and, in a second operating mode, the first and the second piezoelectric element in parallel.
  • the position indicator can be operated both in a first operating mode (standard mode of operation) with only one of the piezo elements. If one requires a larger travel, ie further stroke, then the second piezoelectric element is connected and driven in parallel to the first piezoelectric element in a suitable manner. In this way Kings ⁇ reserves to achieve a larger travel, z. B. for critical cold starts or hot starts are retrieved. It is also possible to compensate for a drift of the piezo elements, the currency ⁇ end-of-life occurs, so that the positioning element is again adjusted, in its behavior to the behavior that had the positioning element to an initial state. In particular, the first or second operating mode can be chosen so that the drift of the positioner is compensated as possible with respect to the travel.
  • the positioner may comprise one or more further piezo elements which are connected to the first and second, respectively
  • Piezoelement are arranged, that adds the adjusting movements of the one or more further piezoelectric elements to the adjusting movement of the first and second piezoelectric element.
  • the further piezoelectric elements can be controlled individually by the control unit depending on the duration of operation.
  • the further piezoelectric element is actuated by the control unit in a third operating mode together with the first and the second piezoelectric element as a function of the operating time.
  • the Stabili ⁇ may be formed as an elastic membrane s ists founded which is connected to a housing of the injection valve to the area of the first piezoelectric element and the region to separate the second piezoelectric element from each other. In this way can be achieved, for example, that the Sta ⁇ bilmaschines adopted addition to stabilizing the positioning speed to a transverse movement also has bers suitable
  • a position indicator which has a first piezoelectric element and a second piezoelectric element.
  • the first and the second piezoelectric element are arranged one above the other so that add their adjusting movements in their control.
  • the piezoelectric elements are formed separately controllable from each other.
  • Such an actuator has the advantage that the piezoelectric elements can be actuated both individually and jointly, so that actuation and desired positioning movement can essentially be selected by controlling either only one of the piezoelectric elements or the first and second piezoelements.
  • a stabilizing device may be provided between the first and the second piezoelectric element, a stabilizing device to counteract a transverse movement perpendicular to the direction of the adjusting movement.
  • the stabilization device may be formed as an elastic membrane, which is ver ⁇ connected with a housing of the positioner to separate the region of the first piezoelectric element and the region of the second piezoelectric element from each other. Furthermore, it can be provided that a sealing device is provided between the first and the second piezoelectric element.
  • control unit for driving a connectable actuating ⁇ encoder combustion engine, particularly an injection valve for an internal ⁇ provided.
  • the control unit comprises an ERS ⁇ th and a second terminal, a first and a second piezoelectric element of a positioning element to be connected ⁇ control.
  • the control unit is designed such that in ei ⁇ nem operating mode only the first piezoelectric element controls and in a second operating mode in parallel drives the first and the second piezoelectric element.
  • the second operating mode is assumed in particular in the case of special operating states of the internal combustion engine and / or after a certain operating period of the injection valve has expired.
  • the control unit can be designed so that the first or the second operating mode Be ⁇ is selected so that the drift of the positioner is compensated as possible with respect to the travel.
  • a method for controlling a position indicator comprises a first and a second piezo element, which add up when they actuate their adjusting movements.
  • the method comprises the steps of driving only the first piezoelectric element in a first operating mode and the parallel driving of the first and the second piezoelectric element in a second operating mode.
  • FIG. 1 shows an injection system according to a preferred embodiment of the present invention
  • FIG. 2 shows an embodiment of an injection valve
  • FIG. 3 shows a further embodiment of an injection valve.
  • FIG. 1 shows a detail of an injection system 1 which comprises a control unit 2 and an injection valve 3.
  • the injection valve 3 serves to control the Zumoni ⁇ tion of fuel in an internal combustion engine.
  • the A ⁇ injection valve 3 is shown for clarity in Figure 1 only as a section in which a piezoelectric actuator is provided.
  • the piezoelectric actuator has a first piezoelectric element 4 and a second piezoelectric element 5 and is electrically connected to the control unit 2 via first control lines 6 and second control lines 7, respectively.
  • the control unit 2 controls the piezoelectric elements 4, 5 separately in order to cause a Stellbe- movement in them, which opens the valve in the case of an injection valve 3 or closes.
  • the opening and closing of the injection valve 3 is controlled by the control unit 2 depending on measured system sizes.
  • the control unit 2 activates only the first piezoelectric element 4, which is designed to achieve the desired set stroke, ie the adjusting movement necessary for opening and closing the injection valve.
  • the first operating mode Be ⁇ the second piezoelectric element is not driven, so that it zoiatas is moved only by the adjusting movement of the first piezo.
  • the first and the second piezoelectric element 4, 5 are coupled to each other via a connecting element 8, so that their actuation their rectifying movements are rectified in the direction of its longitudinal axis.
  • the connecting element 8 between the first and the second piezo element 4, 5 preferably connects the two piezo elements 4, 5 to one another such that a transverse movement perpendicular to the direction of the adjusting movement is prevented or attenuated as far as possible.
  • a fixed end 9 of the first piezoelectric element 4 is fixed to a housing 10 of the Injector 3 is connected so that an adjusting movement in the form of an elongation or stretching acts by supporting on the fixed end 9 directly via the connecting element 8 on the two ⁇ te piezoelectric element 5 and the second piezoelectric element 5 thus moves.
  • a caused by a corresponding control actuator ⁇ movement of the second piezoelectric element 5 is rectified and is added when driven to the actuating movement of the first piezo element, so that a secured at a fixed end 11 of the two ⁇ th piezoelectric element 5 setting pin 12 performs an adjusting movement.
  • the controller 2 In a second operating mode, the controller 2 then controls both piezo elements 4, 5 via the corresponding Ansteu ⁇ er réelleen 6, 7, so that the adjusting movement of the added control movements of the individual piezoelectric elements 4, 5 is composed.
  • the second operating mode can be taken in special operating conditions of the injection system, such as at a warm start or cold start, with other changes in the travel of the piezoelectric actuator, depending on a temperature in the internal combustion engine, or can be taken after a certain total operating time of the injector to a Usually to compensate for existing drift of the elongations of the piezo elements in an injection valve. Ie.
  • FIG. 2 shows a further embodiment of the injection valve of FIG. 1.
  • the execution form of the figure 2 differs from the injection valve in the exporting ⁇ approximate shape of Figure 1 in that 13 vorgese ⁇ is hen between the first and the second piezoelectric element 4, 5, an intermediate element that can be formed on the one hand as an elastic diaphragm, around the area of the first piezo-element 4 and the area, the second piezoelectric element 5 is in the to separate from ⁇ each other so, so that no dirt, fluids flues ⁇ and the like between the areas of the two piezoelectric elements 4, 5 can be exchanged.
  • the intermediate element 13 may also be provided as not the two Berei ⁇ che separating elastic element that is connected to the housing 10 of the injection valve 3 in order to stabilize the entire piezoelectric actuator in the transverse direction perpendicular to the direction of the adjusting movement. In particular, if a compressive force is exerted on the piezoelectric actuator by the adjusting movement, lateral deflection and bending of the piezoactuator may occur. By means of the intermediate element 13, which then serves as a stabilizing element, the deflection of the piezoelectric actuator in a lateral direction can be prevented or reduced.
  • an embodiment of the intermediate element 13 as a sealing element and at the same time as a stabilizing element is advantageous because at the same time the piezoelectric actuator in
  • Transverse direction can be stabilized and continue to seal the two areas can be achieved against each other.
  • FIG. 3 shows a further form of the guide is from erfindungsge ⁇ MAESSEN injector shown.
  • the one shown there ⁇ injection valve has a piezoelectric actuator 20 with four separated at ⁇ controllable piezoelectric elements 21, 22, 23, 24, which übereinan-

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un système de capteur de réglage, notamment un système d'injection pour moteur à combustion interne comportant un capteur de réglage, en particulier une soupape d'injection, qui comprend un premier élément piézo-électrique et un second élément piézo-électrique. Le premier et le second élément piézo-électrique sont disposés l'un sur l'autre, de sorte que leurs mouvements de réglage s'additionnent. Ledit système comprend également une unité de commande, reliée au premier et au second élément piézo-électrique à des fins de commande. Dans un premier mode d'exploitation, l'unité de commande ne pilote que le premier élément piézo-électrique et dans un second mode d'exploitation, le premier et le second élément piézo-électrique, en parallèle.
PCT/EP2006/061165 2005-03-31 2006-03-30 Systeme capteur de reglage, capteur de reglage et unite de commande et procede pour assurer la commande du capteur de reglage WO2006103266A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005014784.4 2005-03-31
DE102005014784A DE102005014784B4 (de) 2005-03-31 2005-03-31 Stellgebersystem, Stellgeber sowie Steuereinheit und Verfahren zum Ansteuern des Stellgebers

Publications (1)

Publication Number Publication Date
WO2006103266A1 true WO2006103266A1 (fr) 2006-10-05

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PCT/EP2006/061165 WO2006103266A1 (fr) 2005-03-31 2006-03-30 Systeme capteur de reglage, capteur de reglage et unite de commande et procede pour assurer la commande du capteur de reglage

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DE (1) DE102005014784B4 (fr)
WO (1) WO2006103266A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012204252B3 (de) 2012-03-19 2013-08-29 Continental Automotive Gmbh Verfahren zum Betreiben eines Kraftstoffeinspritzsystems mit Druckabbau und Kraftstoffeinspritzsystem mit Einspritzventil mit Servoventil

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4721447A (en) * 1985-08-24 1988-01-26 Reifenhauser Gmbh & Co. Maschinenfabrik Shaping tool for an extruder or calibrator for thermoplastic material
US6025671A (en) * 1997-03-27 2000-02-15 Robert Bosch Gmbh Piezoelectric actuator
US6400066B1 (en) * 2000-06-30 2002-06-04 Siemens Automotive Corporation Electronic compensator for a piezoelectric actuator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19905340C2 (de) * 1999-02-09 2001-09-13 Siemens Ag Verfahren und Anordnung zur Voreinstellung und dynamischen Nachführung piezoelektrischer Aktoren

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4721447A (en) * 1985-08-24 1988-01-26 Reifenhauser Gmbh & Co. Maschinenfabrik Shaping tool for an extruder or calibrator for thermoplastic material
US6025671A (en) * 1997-03-27 2000-02-15 Robert Bosch Gmbh Piezoelectric actuator
US6400066B1 (en) * 2000-06-30 2002-06-04 Siemens Automotive Corporation Electronic compensator for a piezoelectric actuator

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DE102005014784A1 (de) 2006-10-05
DE102005014784B4 (de) 2013-07-18

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