DE10310296A1 - Stroke setting method for piezoelectric or electrostrictive actuator e.g. for IC engine fuel injection valve, using adjustment of number of internal electrodes supplied with operating voltage - Google Patents
Stroke setting method for piezoelectric or electrostrictive actuator e.g. for IC engine fuel injection valve, using adjustment of number of internal electrodes supplied with operating voltage Download PDFInfo
- Publication number
- DE10310296A1 DE10310296A1 DE10310296A DE10310296A DE10310296A1 DE 10310296 A1 DE10310296 A1 DE 10310296A1 DE 10310296 A DE10310296 A DE 10310296A DE 10310296 A DE10310296 A DE 10310296A DE 10310296 A1 DE10310296 A1 DE 10310296A1
- Authority
- DE
- Germany
- Prior art keywords
- actuator
- stroke
- internal electrodes
- voltage
- piezoelectric
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000446 fuel Substances 0.000 title description 2
- 238000002347 injection Methods 0.000 title 1
- 239000007924 injection Substances 0.000 title 1
- 239000000919 ceramic Substances 0.000 claims abstract description 22
- 238000013532 laser treatment Methods 0.000 claims 1
- 238000005476 soldering Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- 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
- H10N30/01—Manufacture or treatment
- H10N30/06—Forming electrodes or interconnections, e.g. leads or terminals
- H10N30/063—Forming interconnections, e.g. connection electrodes of multilayered piezoelectric or electrostrictive parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/16—End position calibration, i.e. calculation or measurement of actuator end positions, e.g. for throttle or its driving actuator
-
- 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
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2464—Characteristics of actuators
- F02D41/2467—Characteristics of actuators for injectors
-
- 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
- F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
-
- 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
- H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Stand der TechnikState of technology
Die Erfindung betrifft ein Verfahren zum Einstellen des Hubes eines piezoelektrischen oder elektrostriktiven Aktors sowie eine Vorrichtung zur Durchführung des Verfahrens. Es sind schon piezoelektrische oder elektrostriktive Aktoren bekannt, die aus einem Stapel geschichteter Kermikelemente aufgebaut sind, welche sich beim Anlegen elektrischer Felder an die Keramikelemente ausdehnen bzw. zusammenziehen. Aufgrund des extrem schnellen und genau regelbaren Dehnungseffekts können derartige Keramiken zum Bau von Stellern verwendet werden. Da dabei die elektrischen Feldstärken im Bereich von mehreren Kilovolt pro Millimeter liegen und in der Regel moderate elektrische Spannungen zur Ansteuerung gewünscht sind, werden sogenannte Vielschichtaktoren hergestellt, deren Schichtdicke im Bereich von 100 μm liegt. Bei Verwendung der Aktoren als Steller, beispielsweise zur Betätigung eines Brennstoffeinspritzventils, sind sehr präzise Hubeinstellungen nötig. Je nach Chargen- oder Exemplarsteuung stellt sich aber bei einer fest vorgegebenen Sollspannung eine unerwünschte Hubstreuung unter gleichartigen Aktoren ein, die zu vermeiden bzw. zu verringern ist. Als möglichen Grund für eine derartige Hubstreuung können beispielsweise bei einem Piezoaktor herstellungsbedingte Unterschiede in der Dicke der Keramikschichten genannt werden, welche wegen der Feldstärkenabhängigkeit des piezoelektrischen Koeffizienten zu einer Hubvariation des Piezoaktors führen.The invention relates to a method to adjust the stroke of a piezoelectric or electrostrictive Actuator and a device for performing the method. There are already known piezoelectric or electrostrictive actuators that are constructed from a stack of layered ceramic elements, which expand when applying electrical fields to the ceramic elements or contract. Because of the extremely fast and precisely controllable Stretching effect can such ceramics are used for the construction of plates. Since there the electric field strengths are in the range of several kilovolts per millimeter and in the Usually moderate electrical voltages are required for control, So-called multi-layer actuators are manufactured, whose layer thickness in the range of 100 μm lies. When using the actuators as actuators, for example activity of a fuel injector, very precise stroke settings are necessary. ever after batch or copy control, however, is found in one predetermined target voltage an undesirable stroke spread under the same Actuators that should be avoided or reduced. As possible reason for such a stroke spread for example in the case of a piezo actuator, production-related differences in the thickness of the ceramic layers, which are due to the Field dependence of the piezoelectric coefficient to a stroke variation of the piezo actuator to lead.
Aus der
Vorteile der ErfindungAdvantages of invention
Das erfindungsgemäße Verfahren zum Einstellen des Hubes eines piezoelektrischen oder elektrostriktiven Aktors hat demgegenüber den Vorteil, dass für eine Mehrzahl an Aktoren die Exemplar- und Chargenstreuung hinsichtlich ihres Hubes minimiert werden kann. Damit kann eine Mehrzahl von Aktoren so eingestellt werden, dass ihre Hubcharakteristik bei vorgegebener Spannung bzw. Ladung eng spezifiziert vorliegt.The adjustment method according to the invention the stroke of a piezoelectric or electrostrictive actuator has against it the advantage that for a plurality of actuators with regard to specimen and batch scattering their stroke can be minimized. A plurality of Actuators are set so that their stroke characteristics at a given Voltage or charge is narrowly specified.
Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous further developments of Invention are in the subclaims specified.
Zeichnungdrawing
Nachfolgend werden verschiedene Ausführungsbeispiele der Erfindung unter Bezugnahme auf die beiliegende Zeichnung im Detail erläutert. Gleiche oder gleichartige Teile werden durch gleiche Bezugszeichen gekennzeichnet. In der Zeichnung zeigen:Various embodiments are described below the invention with reference to the accompanying drawings in Explained in detail. The same or similar parts are identified by the same reference numerals characterized. The drawing shows:
Beschreibung der Ausführungsbeispieledescription of the embodiments
In
Der nach dem weiter unten beschriebenen, erfindungsgemäßen Verfahren
eingestellte Aktor
Wie in
In
An der Seitenfläche
Die Vorrichtung
Je nach Art und Weise des verwendeten
Aktors
Die Wirkungsweise des erfindungsgemäßen Verfahrens
ist wie folgt: Bei Spannungsbeaufschlagung des Aktors
h = Hub
n
= Anzahl aktiver Keramikelemente
d33 = piezoelektrischer
Koeffizient,
E = Chargen- bzw. Exemplarstreuung des piezoelektrischen
Koeffizienten
U = die zwischen den Innenelektroden
ist.The method of operation of the method according to the invention is as follows: when the actuator is subjected to voltage
h = stroke
n = number of active ceramic elements
d33 = piezoelectric coefficient,
E = batch or specimen scatter of the piezoelectric coefficient
U = the one between the inner electrodes
is.
In Folge des Faktors E ergeben sich
Unterschiede zwischen verschiedenen Aktoren
Da nach dem Aufbau des aus den Keramikelementen
Die Veränderung von Keramikschichten kann
auf verschiedene Weise erreicht werden. So ist es denkbar, bereits
elektrisch beaufschlagte, d.h. aktivierte Keramikelemente
Die Erfindung ist nicht auf die gezeigten Ausführungsbeispiele beschränkt. Sie kann gleichermaßen bei piezoelektrischen oder elektrostriktiven Aktoren angewandt werden.The invention is not shown on the embodiments limited. It can equally can be applied to piezoelectric or electrostrictive actuators.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10310296A DE10310296A1 (en) | 2003-03-10 | 2003-03-10 | Stroke setting method for piezoelectric or electrostrictive actuator e.g. for IC engine fuel injection valve, using adjustment of number of internal electrodes supplied with operating voltage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10310296A DE10310296A1 (en) | 2003-03-10 | 2003-03-10 | Stroke setting method for piezoelectric or electrostrictive actuator e.g. for IC engine fuel injection valve, using adjustment of number of internal electrodes supplied with operating voltage |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10310296A1 true DE10310296A1 (en) | 2004-09-23 |
Family
ID=32891980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10310296A Withdrawn DE10310296A1 (en) | 2003-03-10 | 2003-03-10 | Stroke setting method for piezoelectric or electrostrictive actuator e.g. for IC engine fuel injection valve, using adjustment of number of internal electrodes supplied with operating voltage |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10310296A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005018322A1 (en) * | 2005-04-20 | 2006-10-26 | Siemens Ag | Piezoactuator and method for its production |
FR2918123A1 (en) * | 2007-06-27 | 2009-01-02 | Renault Sas | FLUID INJECTION DEVICE. |
-
2003
- 2003-03-10 DE DE10310296A patent/DE10310296A1/en not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005018322A1 (en) * | 2005-04-20 | 2006-10-26 | Siemens Ag | Piezoactuator and method for its production |
DE102005018322B4 (en) * | 2005-04-20 | 2007-03-08 | Siemens Ag | Piezoactuator and method for its production |
FR2918123A1 (en) * | 2007-06-27 | 2009-01-02 | Renault Sas | FLUID INJECTION DEVICE. |
WO2009007596A2 (en) * | 2007-06-27 | 2009-01-15 | Renault S.A.S. | Fluid injection device |
WO2009007596A3 (en) * | 2007-06-27 | 2009-03-26 | Renault Sa | Fluid injection device |
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Legal Events
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8139 | Disposal/non-payment of the annual fee |