WO2009130096A1 - Verfahren zur ansteuerung eines piezoaktors in einem kraftstoffinjektor - Google Patents
Verfahren zur ansteuerung eines piezoaktors in einem kraftstoffinjektor Download PDFInfo
- Publication number
- WO2009130096A1 WO2009130096A1 PCT/EP2009/053313 EP2009053313W WO2009130096A1 WO 2009130096 A1 WO2009130096 A1 WO 2009130096A1 EP 2009053313 W EP2009053313 W EP 2009053313W WO 2009130096 A1 WO2009130096 A1 WO 2009130096A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piezoelectric actuator
- aktorbodenplatte
- starting position
- actuator
- injection
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000446 fuel Substances 0.000 title claims description 11
- 230000003213 activating effect Effects 0.000 title abstract 2
- 238000002347 injection Methods 0.000 claims abstract description 24
- 239000007924 injection Substances 0.000 claims abstract description 24
- 230000001419 dependent effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 2
- 230000002123 temporal effect Effects 0.000 claims 1
- 230000004913 activation Effects 0.000 abstract 2
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000003679 aging effect Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 230000008646 thermal stress Effects 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
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
Definitions
- the invention relates to a method for controlling a piezoelectric actuator in a fuel injector, in which the electrically controllable piezoelectric actuator transmits a longitudinal movement (stroke) on an actuating element, wherein between a Aktorêtplatte and the actuating element, a predetermined idle stroke is set, which from a predetermined starting position of the Aktorteilplatte before the control is dependent.
- stroke longitudinal movement
- this longitudinal expansion is for example mechanically reinforced by a lever translator mounted in the fuel or hydraulically by a pressure chamber.
- a lever translator mounted in the fuel or hydraulically by a pressure chamber.
- the goal in most applications is that approximately the entire stroke of the piezoelectric actuator is also used for the mechanical movement of the actuating element, since the size increases with the required stroke. It would follow, the game (idle stroke) between the piezoelectric actuator and the actuator as possible to reduce. On the other hand, always has one
- Actuator and actuator is set so that the required minimum clearance is available even under the most adverse conditions and known aging effects (shrinkage, setting and the like) are considered as far as possible.
- Object of the present invention is to provide a method by which the jittery starting position which occupies the Aktorêtplatte before injection, can be stabilized.
- the piezoelectric actuator, the Aktorteilplatte is in the fluctuating predetermined starting position, is controlled immediately before injection so that a defined deflection of the piezoelectric actuator takes place, so that the Aktorêtplatte before the subsequent Injection assumes a less jittery new starting position.
- the invention is based on the recognition that the Aktorteilplatte is not cleanly returned to the predetermined starting position due to acting at a Einspritzevent highly dynamic forces and therefore exposes the Aktorêtplatte an additional large force to a virtual stop (new starting position) for to produce the Aktorêtplatte with defined, stabilized position ratios.
- the method according to the invention which is advantageously based solely on the modification of the drive signal, makes it possible to realize precisely small amounts in the case of multiple injections and thus to fulfill strict legal standards with regard to the exhaust gas values.
- the piezoelectric actuator is negatively energized to effect the deflection, so that the Aktorêtplatte is retracted to a defined new starting position.
- this can be implemented in a simple manner that the piezoelectric actuator for driving in each case with a
- FIG. 1 shows schematically and in section a structure for a valve controller with a piezoelectric actuator known from the prior art
- FIG. 2 shows a time diagram of the actuator base plate position of a piezoactuator controlled according to the prior art
- FIG. 3 shows, in the same representation as FIG. 2, the actuator base plate position of a piezoactuator actuated according to the invention.
- FIG. 1 of the drawing shows diagrammatically and by way of example the construction of a valve control with an electric piezoactuator 1, which consists of a stack of plate-shaped piezoelectric elements, which are closed towards the valve by an actuator bottom plate 7.
- the mechanical deflection takes place when a voltage is applied perpendicular to the layer plane of the individual piezo elements, that is to say in the longitudinal direction (z direction) of the piezoactuator 1.
- the piezoelectric actuator 1 has in the rest position, that is, without a drive voltage applied, the length I 0 , the Aktorêtplatte 7 assumes its predetermined starting position.
- the distance between the unstretched piezoelectric actuator 1 and a mechanical adjusting or actuating element (here a valve piston 3) is the idle stroke h 0 .
- a mechanical adjusting or actuating element here a valve piston 3
- FIG. 2 shows a diagram in which the position of the actuator base plate 7 of a piezoelectric actuator 1 controlled according to the prior art is shown over time.
- the predetermined starting position (zero position) of the Aktorêtplatte 7 before energization is subject to fluctuation for the reasons above, that is, it has the indicated in Figure 2 scattering ⁇ i, which is reflected in a corresponding scattering of the opening of the valve, since at Each control of the piezoelectric actuator 1 is indeed within the range of variation ⁇ i lying, but slightly different idle stroke is effective.
- the predetermined initial position can be achieved in a manner known per se by a negative energization of the elongate piezoactuator 1, that is, by a discharge.
- a pre-deflection of the piezoactuator 1 takes place immediately before the actual injection event. This deflection leads the Aktorêtplatte 7 in a range that has increased positional stability based on reproducibility.
- the pre-deflection can be advantageously realized as a retraction of the piezoelectric actuator 1 by negative energization and is shown in Figure 3.
- the retraction of the Aktorteilplatte 7 in a new Starting position indicates.
- This new starting position is through a scattering o ⁇ - characterized, which is smaller than the predetermined initial position associated scattering ⁇ i.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/988,576 US20110068189A1 (en) | 2008-04-25 | 2009-03-20 | Method for activating a piezoactuator in a fuel injector |
CN2009801145541A CN102016272A (zh) | 2008-04-25 | 2009-03-20 | 用于控制燃料喷射器中的压电执行器的方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008020931.7 | 2008-04-25 | ||
DE102008020931A DE102008020931A1 (de) | 2008-04-25 | 2008-04-25 | Verfahren zur Ansteuerung eines Piezoaktors in einem Kraftstoffinjektor |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009130096A1 true WO2009130096A1 (de) | 2009-10-29 |
Family
ID=40848479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/053313 WO2009130096A1 (de) | 2008-04-25 | 2009-03-20 | Verfahren zur ansteuerung eines piezoaktors in einem kraftstoffinjektor |
Country Status (5)
Country | Link |
---|---|
US (1) | US20110068189A1 (de) |
KR (1) | KR20110016901A (de) |
CN (1) | CN102016272A (de) |
DE (1) | DE102008020931A1 (de) |
WO (1) | WO2009130096A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010021448A1 (de) * | 2010-05-25 | 2011-12-01 | Continental Automotive Gmbh | Verfahren und Vorrichtung zur Regelung der elektrischen Polarisation eines piezoelektrischen Aktuators |
DE102012221529A1 (de) * | 2012-11-26 | 2014-05-28 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Ansteuerung eines Piezoaktors |
FR3013392B1 (fr) * | 2013-11-21 | 2017-12-29 | Continental Automotive France | Procede de surveillance d'un injecteur de carburant d'un moteur a combustion interne d'un vehicule |
DE102015217193A1 (de) * | 2015-09-09 | 2017-03-09 | Continental Automotive Gmbh | Erfassungsverfahren zum Erfassen einer Spaltgröße eines Spaltes zwischen einer Injektorventilbaugruppe und einem Piezostapel sowie Ansteuerungsverfahren zum Ansteuern einer Aktoreinheit in einem Piezostapel. |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19905340A1 (de) * | 1999-02-09 | 2000-08-10 | Siemens Ag | Verfahren und Anordnung zur Voreinstellung und dynamischen Nachführung piezoelektrischer Aktoren |
WO2002092985A1 (de) * | 2001-05-14 | 2002-11-21 | Siemens Aktiengesellschaft | Verfahren zur ansteuerung eines piezoelektrischen aktors, der der verschiebung eines elements dient |
WO2003052260A1 (de) * | 2001-12-18 | 2003-06-26 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
WO2004001794A2 (de) * | 2002-06-24 | 2003-12-31 | Siemens Aktiengesellschaft | Verfahren zur ansteuerung und längeneinstellung eines piezoelektrischen aktors (pa) und elektronische einheit zur steuerung des verfahrens |
EP1429445A2 (de) * | 2002-12-09 | 2004-06-16 | Siemens Aktiengesellschaft | Verfahren und Anordnung zum Ansteuern eines piezoelektrischen Aktors |
WO2008022951A1 (de) * | 2006-08-23 | 2008-02-28 | Continental Automotive Gmbh | Verfahren zur leerhubsteuerung einer kraftstoffeinspritzvorrichtung |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5482213A (en) * | 1993-05-31 | 1996-01-09 | Aisin Seiki Kabushiki Kaisha | Fuel injection valve operated by expansion and contraction of piezoelectric element |
JP4277384B2 (ja) * | 1999-09-30 | 2009-06-10 | コニカミノルタホールディングス株式会社 | 圧電アクチュエータ |
US6880769B2 (en) * | 2001-12-17 | 2005-04-19 | Caterpillar Inc | Electronically-controlled fuel injector |
EP1511932B1 (de) * | 2002-04-04 | 2006-11-29 | Siemens Aktiengesellschaft | Einspritzventil |
DE10331057B4 (de) * | 2003-07-09 | 2006-12-28 | Siemens Ag | Verfahren und Vorrichtung zum Einstellen eines Leerhubs eines piezoelektrischen Aktors |
-
2008
- 2008-04-25 DE DE102008020931A patent/DE102008020931A1/de active Pending
-
2009
- 2009-03-20 KR KR1020107026322A patent/KR20110016901A/ko not_active Application Discontinuation
- 2009-03-20 WO PCT/EP2009/053313 patent/WO2009130096A1/de active Application Filing
- 2009-03-20 CN CN2009801145541A patent/CN102016272A/zh active Pending
- 2009-03-20 US US12/988,576 patent/US20110068189A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19905340A1 (de) * | 1999-02-09 | 2000-08-10 | Siemens Ag | Verfahren und Anordnung zur Voreinstellung und dynamischen Nachführung piezoelektrischer Aktoren |
WO2002092985A1 (de) * | 2001-05-14 | 2002-11-21 | Siemens Aktiengesellschaft | Verfahren zur ansteuerung eines piezoelektrischen aktors, der der verschiebung eines elements dient |
WO2003052260A1 (de) * | 2001-12-18 | 2003-06-26 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
WO2004001794A2 (de) * | 2002-06-24 | 2003-12-31 | Siemens Aktiengesellschaft | Verfahren zur ansteuerung und längeneinstellung eines piezoelektrischen aktors (pa) und elektronische einheit zur steuerung des verfahrens |
EP1429445A2 (de) * | 2002-12-09 | 2004-06-16 | Siemens Aktiengesellschaft | Verfahren und Anordnung zum Ansteuern eines piezoelektrischen Aktors |
WO2008022951A1 (de) * | 2006-08-23 | 2008-02-28 | Continental Automotive Gmbh | Verfahren zur leerhubsteuerung einer kraftstoffeinspritzvorrichtung |
Also Published As
Publication number | Publication date |
---|---|
CN102016272A (zh) | 2011-04-13 |
US20110068189A1 (en) | 2011-03-24 |
DE102008020931A1 (de) | 2009-11-19 |
KR20110016901A (ko) | 2011-02-18 |
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