WO2002078098A2 - Vorrichtung zum ansteuern eines piezoelektrischen stellgliedes - Google Patents
Vorrichtung zum ansteuern eines piezoelektrischen stellgliedes Download PDFInfo
- Publication number
- WO2002078098A2 WO2002078098A2 PCT/DE2002/001029 DE0201029W WO02078098A2 WO 2002078098 A2 WO2002078098 A2 WO 2002078098A2 DE 0201029 W DE0201029 W DE 0201029W WO 02078098 A2 WO02078098 A2 WO 02078098A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piezoelectric actuator
- actuator
- energy
- energy source
- controlling
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 16
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 claims abstract description 6
- 239000000446 fuel Substances 0.000 claims description 13
- 238000010586 diagram Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
-
- 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
- H02N2/06—Drive circuits; Control arrangements or methods
- H02N2/062—Small signal circuits; Means for controlling position or derived quantities, e.g. for removing hysteresis
-
- 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
- H10N30/802—Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits
Definitions
- the invention relates to a device for controlling a piezoelectric actuator, in particular for a fuel injection valve of an internal combustion engine, with an energy source which supplies the actuator with energy, the expansion of the piezoelectric actuator having a predetermined temperature response.
- Such a device is known from DE 196 52 801 Cl.
- the energy source there supplies the piezoelectric actuator with a predetermined amount of energy, the value of which is taken from a map as a function of the temperature.
- Piezoelectrically driven injection valves for internal combustion engines are becoming more and more attractive among automobile manufacturers due to the speed and stability of their drive.
- the reproducibility of the injected fuel quantities depends directly on the precision of the movements of the valve needle. Since the needle is driven by the piezoelectric actuator directly, or via a translator or a servo valve in the diesel area, it is necessary to control this actuator electrically with the appropriate precision over the entire temperature range.
- DE 196 52 801 Cl proposes to supply the piezoelectric actuators with constant energy, for which purpose the value of the energy actually to be supplied is obtained from a characteristic map by means of the measured temperature and the charging voltage is adjusted accordingly in order to obtain the desired amount of energy.
- a typical, piezo-driven injection valve loses about 15% of the stroke in the temperature range from 0 2 C to 125 ⁇ C according to Figure 2. It would now be possible to readjust the energy to a larger amount of energy using a corresponding map higher temperatures to compensate for the stroke loss. However, this is only possible if there is sufficient computing power available in the output stage and if the energy supplied to the actuator can be measured internally.
- the object of the present invention is therefore to develop a generic device in a simple manner in such a way that better compensation of needle stroke losses is achieved.
- the device is designed in such a way that a compensation capacitor is connected in parallel to the piezoelectric actuator, the capacitance of which is dimensioned such that, with a constant amount of energy supplied by the energy source, the expansion of the actuator is almost constant above the temperature.
- the capacitance of the piezoelectric actuator increases with increasing temperature, while the capacitance of the compensation capacitor remains approximately constant. This means that with increasing temperature, an increasing proportion of the constant amount of energy supplied by the energy source is stored on the piezoelectric actuator, so that the stroke loss can be almost completely compensated for with a suitable dimensioning of the compensation capacitor. In the manner according to the invention, this is not a complex regulation necessary but just another component that must be suitably dimensioned.
- the device according to the invention for controlling a piezoelectric actuator can be used in a conventional manner in an internal combustion engine, the piezoelectric actuator being designed as a structural unit with the fuel injection valve and being connected via a cable to a control device in which both the energy source and the downstream compensation capacitor are connected as well as a control circuit for controlling the energy source are included.
- the device according to the invention can be used in a particularly advantageous manner in an “intelligent” fuel injection valve, since not only is the piezoelectric actuator designed as a structural unit with the injection valve, but also the energy source and a simple control unit are arranged in this structural unit.
- the compensation capacitor is also arranged in this structural unit and enables a particularly simple compensation of the stroke losses, especially since the control unit does not have sufficient computing power for complex control and an exact measurement of the actuator temperature is not possible.
- FIG. 1 shows a basic circuit diagram of a device for controlling a piezoelectric actuator according to the prior art
- FIG. 2 shows the course of an actuator stroke over the temperature with constant supplied energy
- FIG. 3 shows a basic circuit diagram of a device for controlling a piezoelectric actuator according to the invention
- 4 shows the course of the energy fed into an actuator according to the St.DT and according to the invention
- FIG. 5 shows a first use of the invention
- FIG. 6 shows a second use of the invention.
- Figure 1 shows a device for driving a piezoelectric actuator for a fuel injection valve of an internal combustion engine, as is common in the prior art.
- An actuator Cp is supplied with a constant energy amount E 0 by an energy source EQ.
- Figure 2 shows the course of the expansion of a piezoelectric actuator depending on the temperature of the actuator when subjected to a constant amount of energy of 60 mJ.
- the actuator loses about 15% stroke in the temperature range from 0 2 C to 125 2 C, which must be compensated for if possible in order to be able to ensure that the desired amount of fuel is actually injected when the actuator is used in a fuel injection valve ,
- a device according to the invention is shown in a basic circuit in FIG.
- a compensation capacitor Co is connected in parallel to the piezoelectric actuator Cp, both capacitors being supplied with a constant amount of energy E 0 by the energy source. There is an amount of energy on the actuator
- the course of the amount of energy Ep attributable to the actuator as a function of the ratio of the capacitance of the actuator to the capacitance of the compensation capacitor Cp / C 0 is shown in FIG.
- the course of the amount of energy for a circuit according to FIG. 1 is also shown there.
- the energy Ep stored on a piezoelectric actuator increases with increasing actuator capacity Cp and thus with increasing temperature, so that the stroke loss can be compensated for.
- an energy source EQ In conventional control circuits for piezoelectric actuators, an energy source EQ, a control circuit ST for controlling the energy source EQ are contained in a control unit SG, which is connected via a cable K to the piezoelectric actuator Cp or to a fuel injection valve containing the actuator Cp.
- the compensation compensator Co is also arranged in the control unit SG according to FIG.
- the voltage at the actuator Cp or its temperature can be transmitted to the control circuit via a measuring line L in order to be able to regulate the stroke, for example.
- a capacitor is usually already present at the output of the energy source EQ, but only for the purpose of complying with EMC guidelines.
- the capacitance of such capacitors is approximately 2 ⁇ F.
- a layer thickness of 80 ⁇ m and SiPd contacting but capacities of about 10.5 ⁇ F are required.
- a particularly advantageous use of the device according to the invention is suitable for so-called “intelligent” fuel injection valves, in which the piezoelectric actuator Cp, an energy source EQ and a control circuit ST and the compensation capacitor Co according to the invention are accommodated in the housing of the fuel injection valve.
- This is shown in principle in FIG , A measuring line L is also drawn in there, but in this embodiment it is not connected to the actuator itself, but rather only to the housing of the fuel injection valve, the temperature of which is measured.
- FIG. 6 also shows a control unit SG which is acted upon on the one hand by the signal on the measuring line L for processing and on the other hand can control the “intelligent” fuel injection valve with control signals.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02753697A EP1371099A2 (de) | 2001-03-21 | 2002-03-21 | Vorrichtung zum ansteuern eines piezoelektrischen stellgliedes |
US10/667,777 US7034436B2 (en) | 2001-03-21 | 2003-09-22 | Device to control a piezoelectric actuator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10113802A DE10113802B4 (de) | 2001-03-21 | 2001-03-21 | Vorrichtung zum Ansteuern eines piezoelektrischen Stellgliedes |
DE10113802.4 | 2001-03-21 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/667,777 Continuation US7034436B2 (en) | 2001-03-21 | 2003-09-22 | Device to control a piezoelectric actuator |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002078098A2 true WO2002078098A2 (de) | 2002-10-03 |
WO2002078098A3 WO2002078098A3 (de) | 2003-05-30 |
Family
ID=7678413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/001029 WO2002078098A2 (de) | 2001-03-21 | 2002-03-21 | Vorrichtung zum ansteuern eines piezoelektrischen stellgliedes |
Country Status (4)
Country | Link |
---|---|
US (1) | US7034436B2 (de) |
EP (1) | EP1371099A2 (de) |
DE (1) | DE10113802B4 (de) |
WO (1) | WO2002078098A2 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003038917A3 (de) * | 2001-10-20 | 2003-10-30 | Bosch Gmbh Robert | Verfahren und vorrichtung zum laden und entladen eines piezoelektrischen elementes |
WO2006125798A2 (de) * | 2005-05-27 | 2006-11-30 | Siemens Aktiengesellschaft | Energiebasierte getaktete leistungs-endstufe für eine festkörperaktor-antriebsvorrichtung und verfahren zum steuern einer solchen leistungs-endstufe |
US7358644B2 (en) | 2002-05-27 | 2008-04-15 | Siemens Aktiengesellschaft | Method for controlling an actuator and control device belonging thereto |
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US7902763B2 (en) * | 2008-01-07 | 2011-03-08 | Midas Wei Trading Co., Ltd. | Piezoelectric cascade resonant lamp-ignition circuit |
TW200931799A (en) * | 2008-01-07 | 2009-07-16 | Midas Wei Trading Co Ltd | High-voltage lamp-lighting-up piezoelectric oscillator |
NL2004395C2 (en) * | 2010-03-15 | 2011-09-16 | Univ Delft Tech | Piezoelectric modal actuator. |
US8786138B2 (en) * | 2010-05-21 | 2014-07-22 | General Electric Company | Systems, methods, and apparatus for controlling actuator drive current using bi-directional hysteresis control |
US10307549B2 (en) * | 2011-02-25 | 2019-06-04 | Koninklijke Philips N.V. | Aerosol generating device for nebulizing a liquid and a method of temperature control of a liquid to be nebulized |
GB2536723A (en) * | 2015-03-27 | 2016-09-28 | Bae Systems Plc | Acoustic Transducer |
AU2016240008A1 (en) | 2015-03-27 | 2017-10-19 | Bae Systems Plc | Acoustic transducer |
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DE3538964A1 (de) * | 1985-11-02 | 1987-05-14 | Swf Auto Electric Gmbh | Einrichtung zur abstandsmessung, insbesondere fuer kraftfahrzeuge |
DE19652801C1 (de) * | 1996-12-18 | 1998-04-23 | Siemens Ag | Verfahren und Vorrichtung zum Ansteuern wenigstens eines kapazitiven Stellgliedes |
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DE19808994A1 (de) * | 1997-03-07 | 1998-10-08 | Murata Manufacturing Co | Ultraschallsensor mit Temperaturkompensationskondensator |
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JPS59181585A (ja) * | 1983-03-31 | 1984-10-16 | Toshiba Corp | 変位発生装置 |
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DE69232272T2 (de) * | 1991-09-24 | 2002-08-08 | Murata Manufacturing Co | Beschleunigungsmessaufnehmer |
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US5659270A (en) * | 1996-05-16 | 1997-08-19 | Motorola, Inc. | Apparatus and method for a temperature-controlled frequency source using a programmable IC |
DE19632872C2 (de) | 1996-08-14 | 1998-08-13 | Siemens Ag | Vorrichtung und Verfahren zum Ansteuern eines kapazitiven Stellgliedes |
DE19714607A1 (de) | 1997-04-09 | 1998-10-15 | Bosch Gmbh Robert | Verfahren und Vorrichtung zum Laden und Entladen eines piezoelektrischen Elements |
DE19854789A1 (de) | 1998-02-10 | 1999-08-12 | Bosch Gmbh Robert | Verfahren und Vorrichtung zum Laden und Entladen eines piezoelektrischen Elements |
DE19805184A1 (de) | 1998-02-10 | 1999-08-12 | Bosch Gmbh Robert | Verfahren und Vorrichtung zum Ermitteln der Temperatur eines piezoelektrischen Elements |
DE19831599A1 (de) | 1998-07-14 | 2000-01-20 | Siemens Ag | Verfahren und Vorrichtung zum Ansteuern wenigstens eines kapazitiven Stellgliedes |
DE19841002C1 (de) | 1998-09-08 | 2000-03-30 | Siemens Ag | Verfahren zur Diagnose eines Kurzschlusses an einem kapazitiven Stellglied |
DE19845042C2 (de) | 1998-09-30 | 2000-08-24 | Siemens Ag | Verfahren und Anordnung zur Diagnose eines kapazitiven Aktors |
DE19910388C2 (de) | 1999-03-09 | 2001-03-29 | Siemens Ag | Verfahren zur Überprüfung eines kapazitiven Stellgliedes |
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DE10033343A1 (de) | 2000-07-08 | 2002-01-17 | Bosch Gmbh Robert | Kraftstoffeinspritzanlage für einen Verbrennungsmotor |
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-
2001
- 2001-03-21 DE DE10113802A patent/DE10113802B4/de not_active Expired - Fee Related
-
2002
- 2002-03-21 EP EP02753697A patent/EP1371099A2/de not_active Withdrawn
- 2002-03-21 WO PCT/DE2002/001029 patent/WO2002078098A2/de active Application Filing
-
2003
- 2003-09-22 US US10/667,777 patent/US7034436B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3538964A1 (de) * | 1985-11-02 | 1987-05-14 | Swf Auto Electric Gmbh | Einrichtung zur abstandsmessung, insbesondere fuer kraftfahrzeuge |
DE19652801C1 (de) * | 1996-12-18 | 1998-04-23 | Siemens Ag | Verfahren und Vorrichtung zum Ansteuern wenigstens eines kapazitiven Stellgliedes |
WO1998027600A1 (de) * | 1996-12-18 | 1998-06-25 | Siemens Aktiengesellschaft | Verfahren und vorrichtung zum ansteuern eines kapazitiven stellgliedes |
DE19808994A1 (de) * | 1997-03-07 | 1998-10-08 | Murata Manufacturing Co | Ultraschallsensor mit Temperaturkompensationskondensator |
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Title |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003038917A3 (de) * | 2001-10-20 | 2003-10-30 | Bosch Gmbh Robert | Verfahren und vorrichtung zum laden und entladen eines piezoelektrischen elementes |
US7358644B2 (en) | 2002-05-27 | 2008-04-15 | Siemens Aktiengesellschaft | Method for controlling an actuator and control device belonging thereto |
WO2006125798A2 (de) * | 2005-05-27 | 2006-11-30 | Siemens Aktiengesellschaft | Energiebasierte getaktete leistungs-endstufe für eine festkörperaktor-antriebsvorrichtung und verfahren zum steuern einer solchen leistungs-endstufe |
WO2006125798A3 (de) * | 2005-05-27 | 2007-02-01 | Siemens Ag | Energiebasierte getaktete leistungs-endstufe für eine festkörperaktor-antriebsvorrichtung und verfahren zum steuern einer solchen leistungs-endstufe |
Also Published As
Publication number | Publication date |
---|---|
EP1371099A2 (de) | 2003-12-17 |
DE10113802A1 (de) | 2002-10-10 |
WO2002078098A3 (de) | 2003-05-30 |
US7034436B2 (en) | 2006-04-25 |
DE10113802B4 (de) | 2007-10-18 |
US20040195936A1 (en) | 2004-10-07 |
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