WO2004036016A1 - Verfahren und vorrichtung zur steuerung eines piezoaktors - Google Patents
Verfahren und vorrichtung zur steuerung eines piezoaktors Download PDFInfo
- Publication number
- WO2004036016A1 WO2004036016A1 PCT/DE2003/003230 DE0303230W WO2004036016A1 WO 2004036016 A1 WO2004036016 A1 WO 2004036016A1 DE 0303230 W DE0303230 W DE 0303230W WO 2004036016 A1 WO2004036016 A1 WO 2004036016A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- piezo actuator
- takes place
- time
- place depending
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims description 11
- 239000000446 fuel Substances 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 230000004913 activation Effects 0.000 description 10
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 230000010355 oscillation Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 230000001960 triggered effect 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1486—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor with correction for particular operating conditions
- F02D41/1488—Inhibiting the regulation
- F02D41/1489—Replacing of the control value by a constant
-
- 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
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/14—Timing of measurement, e.g. synchronisation of measurements to the engine cycle
Definitions
- the invention relates to a method and a device for controlling a piezo actuator according to the preambles of the independent claims.
- a method and a device for controlling a piezo actuator are known from EP 11 38902.
- the voltage that is present at the piezo actuator is detected and evaluated at predetermined times. This evaluation is carried out with a view to a possible regulation of the voltage and / or for monitoring the piezo actuator.
- Piezo actuators are used in particular in piezo injectors, which in turn are used for fuel metering in internal combustion engines.
- a piezo injector includes, among other things, a piezoceramic pretensioned with a spring, which essentially behaves like a spring-mass system. If the piezo actuator is charged or discharged in a clocked manner, there is an essentially step-like voltage curve during charging and discharging. Even with a constant electrical charge in the piezo actuator, compressing the piezo actuator leads to a reduction in voltage or expansion leads to an increase in voltage. This leads to an overshoot or undershoot in the voltage.
- the oscillation of the spring-mass system of the pretensioned piezo actuator generates an overshoot and undershoot. This occurs particularly during and shortly after the end of the charging or discharging process.
- the fuel pressure also acts on the piezo actuator through hydraulic effects. Through the injection at the end of the charging process or through the termination of the injection, pressure waves in the fuel are triggered, which act on the piezo actuator via hydraulic effects and also excite it to vibrate and thus to voltage vibrations.
- the voltage oscillations subside.
- the voltage is therefore usually measured before discharging or before charging.
- the influence of the voltage oscillations on the measured voltage value increases with short activation times due to the small time interval between the charging process and the measurement time.
- the amplitude of the voltage oscillation also increases with increasing rail pressure. According to the invention, provision is therefore made for the detection of the voltage values and / or their forwarding to be blocked when certain variables are present.
- FIG. 1 shows a block diagram of the procedure according to the invention
- FIG. 2 shows a flow diagram of the method according to the invention.
- FIG. 1 An output stage, as is known, for example, from the prior art, is designated by 100. This is acted upon by signals from a controller 110 and a controller 120. Furthermore, a voltage detection 130 is provided, which detects the voltage that drops at the piezo actuator. The voltage U arrives via a logic 140 on the one hand to the regulation 120 and on the other hand to a monitoring 150.
- the controller 110 sends signals to the output stage 100 which determine the start and the end of the fuel metering. These are calculated by the controller 110 on the basis of sensor signals (not shown) and other variables (not shown), such as the driver's desired torque. Starting from the start and end of the injection, the output stage 100 calculates the point in time at which the piezo actuator is charged or discharged.
- the voltage to which the piezo actuator is charged is regulated.
- This voltage regulation is provided in particular to regulate slow changes, which are based in particular on temperature effects, aging and / or long-term drifts.
- an actual value UI for the voltage is compared with a target value US, which is specified by the control 110, and then a corresponding manipulated variable is passed on to the output stage 100.
- the voltage detection 130 detects this voltage and then passes it on to the controller 120 or to the monitoring 150 depending on a logic 140. By evaluating the voltage, the monitoring device 150 detects errors in the context of the control or in the area of the piezo actuator. This means that the detected voltage is used for monitoring and / or for forming a control variable.
- the logic 140 detects whether strong vibrations occur which make it difficult to detect the voltage.
- the logic 140 blocks the forwarding of the detected voltage value for further evaluation.
- the logic 140 already blocks the voltage detection and in the no voltage measurement takes place in selected operating states.
- the logic enables the measurement or the use of the measured voltage values as a function of the rail pressure and the distance between the time at which the voltage is detected and at the end of the charging process and / or the discharging process.
- step 200 the rail pressure P is recorded.
- step 210 the detected pressure signal is corrected and a corrected rail pressure PK is determined. This correction takes into account in particular the pressure wave that the fuel passes through at the beginning of the injection and at the end of the injection.
- step 220 the activation period AD and the charging time LD are determined.
- the activation period AD corresponds to the time between the start of the charging process and the end of the activation.
- the charging time LD corresponds to the distance between the start of charging and the end of the charging process.
- the charging time is preferably recorded, i.e. the end of the charging process is measured and the difference from the start of charging, which is present in the controller 110 and / or in the output stage 100, is formed.
- an expected charging time which is present in the controller 110 and / or in the output stage 100, is used.
- the control period AD is also present in the controller 110 and / or in the output stage 100.
- the distance between the sampling time for the voltage detection and the end of the charging process which is denoted by A, is determined by forming the difference between the activation period AD and the charging period LD.
- a next step 240 the rail pressure and the time difference A are fed to a map and / or a table in which a value Y is stored, which preferably assumes the value 1 or the value 0.
- the value 0 preferably indicates that the voltage measurement is blocked and the value 1 that the voltage measurement is enabled.
- the subsequent query 250 checks whether the value Y assumes the value 0. If this is the case, the voltage measurement is given blocked in step 260. If this is not the case, the voltage measurement is released in step 270. If the voltage measurement is blocked, the regulation 120 is activated by a Control replaced and / or the manipulated variable frozen. This can be achieved, for example, by storing the previous value UI and continuing to use it. Alternatively, it can also be provided that the output signal of the control unit 120 is stored and used further.
- the blocking occurs depending on the fuel pressure and / or on a variable that characterizes the distance between the time of the voltage measurement and the end of the charging process and / or the charging process of the actuator.
- the last unlocked voltage value is used for regulation and / or monitoring. That means the voltage value is frozen.
- the last manipulated variable used before the block can be used for control. In the case of regulation, this means that the output signal of the regulator with which the actuator is controlled is frozen.
- the activation period AD of the actuator and / or the delivery period of the injector is evaluated.
- the voltage measurement is blocked and / or the transmission is prevented if the activation period AD and / or the delivery period is less than a threshold value.
- the threshold value preferably depends on the rail pressure.
- the activation period AD, the delivery period and / or the relationship between the activation period and the charging time is processed instead of size A.
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 (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004543949A JP4437088B2 (ja) | 2002-10-15 | 2003-09-29 | ピエゾアクチュエータの制御のための方法及び装置 |
EP03750376A EP1579111A1 (de) | 2002-10-15 | 2003-09-29 | Verfahren und vorrichtung zur steuerung eines piezoaktors |
US10/531,530 US7528524B2 (en) | 2002-10-15 | 2003-09-29 | Method and device for controlling a piezo actuator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10247988.7 | 2002-10-15 | ||
DE10247988A DE10247988A1 (de) | 2002-10-15 | 2002-10-15 | Verfahren und Vorrichtung zur Steuerung eines Piezoaktors |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004036016A1 true WO2004036016A1 (de) | 2004-04-29 |
Family
ID=32049276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2003/003230 WO2004036016A1 (de) | 2002-10-15 | 2003-09-29 | Verfahren und vorrichtung zur steuerung eines piezoaktors |
Country Status (6)
Country | Link |
---|---|
US (1) | US7528524B2 (de) |
EP (1) | EP1579111A1 (de) |
JP (1) | JP4437088B2 (de) |
CN (1) | CN100366882C (de) |
DE (1) | DE10247988A1 (de) |
WO (1) | WO2004036016A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008101769A1 (de) * | 2007-02-19 | 2008-08-28 | Continental Automotive Gmbh | Verfahren zur regelung einer einspritzmenge eines injektors einer brennkraftmaschine |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005036190A1 (de) * | 2005-08-02 | 2007-02-08 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung eines Einspritzsystems einer Brennkraftmaschine |
US7681555B2 (en) * | 2006-05-23 | 2010-03-23 | Delphi Technologies, Inc. | Controller for a fuel injector and a method of operating a fuel injector |
DE102009001077A1 (de) * | 2009-02-23 | 2010-08-26 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Endstufe für mindestens einen Piezoaktor |
WO2011146907A2 (en) | 2010-05-20 | 2011-11-24 | Cummins Intellectual Properties, Inc. | Piezoelectric fuel injector system, method for estimating timing characteristics of a fuel injector event |
DE112012000505B4 (de) | 2011-01-19 | 2018-04-05 | Cummins Intellectual Property, Inc. | Kraftstoffeinspritzdüse mit einem piezoelektrischen Aktuator und einer Sensoranordnung |
DE102015210053A1 (de) | 2015-06-01 | 2016-12-01 | Robert Bosch Gmbh | Verfahren zur Bestimmung eines reproduzierbaren Spannungsmesswertes |
DE102016206476B3 (de) * | 2016-04-18 | 2017-06-14 | Continental Automotive Gmbh | Verfahren zum Betreiben eines diesel-common-rail-piezobetriebenen Servoinjektors und Kraftfahrzeug |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1010876A2 (de) * | 1998-12-17 | 2000-06-21 | Honda Giken Kogyo Kabushiki Kaisha | Einzylinder-Viertaktbrennkraftmaschine |
EP1138902A1 (de) * | 2000-04-01 | 2001-10-04 | Robert Bosch GmbH | Verfahren und Vorrichtung zur zeitgesteuerter Spannungsmessung über einer Vorrichtung in einem Ladungskreis eines piezoelektrischen Element |
EP1139445A1 (de) * | 2000-04-01 | 2001-10-04 | Robert Bosch GmbH | Methode und Vorrichtung für die Diagnose einer Störung in einem System, das ein piezoelektrisches Element verwendet |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1198865A (ja) | 1997-07-24 | 1999-04-09 | Minolta Co Ltd | 電気機械変換素子を利用した駆動装置 |
DE10155390A1 (de) * | 2001-11-10 | 2003-05-22 | Bosch Gmbh Robert | Verfahren und Vorrichtung zum Laden und Entladen eines piezoelektrischen Elementes |
-
2002
- 2002-10-15 DE DE10247988A patent/DE10247988A1/de not_active Withdrawn
-
2003
- 2003-09-29 WO PCT/DE2003/003230 patent/WO2004036016A1/de active Application Filing
- 2003-09-29 US US10/531,530 patent/US7528524B2/en not_active Expired - Fee Related
- 2003-09-29 JP JP2004543949A patent/JP4437088B2/ja not_active Expired - Fee Related
- 2003-09-29 CN CNB038034999A patent/CN100366882C/zh not_active Expired - Fee Related
- 2003-09-29 EP EP03750376A patent/EP1579111A1/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1010876A2 (de) * | 1998-12-17 | 2000-06-21 | Honda Giken Kogyo Kabushiki Kaisha | Einzylinder-Viertaktbrennkraftmaschine |
EP1138902A1 (de) * | 2000-04-01 | 2001-10-04 | Robert Bosch GmbH | Verfahren und Vorrichtung zur zeitgesteuerter Spannungsmessung über einer Vorrichtung in einem Ladungskreis eines piezoelektrischen Element |
EP1139445A1 (de) * | 2000-04-01 | 2001-10-04 | Robert Bosch GmbH | Methode und Vorrichtung für die Diagnose einer Störung in einem System, das ein piezoelektrisches Element verwendet |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008101769A1 (de) * | 2007-02-19 | 2008-08-28 | Continental Automotive Gmbh | Verfahren zur regelung einer einspritzmenge eines injektors einer brennkraftmaschine |
US8165783B2 (en) | 2007-02-19 | 2012-04-24 | Continental Automotive Gmbh | Method of controlling an injection quantity of an injector of an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
DE10247988A1 (de) | 2004-04-29 |
JP2006503533A (ja) | 2006-01-26 |
JP4437088B2 (ja) | 2010-03-24 |
US20060152879A1 (en) | 2006-07-13 |
US7528524B2 (en) | 2009-05-05 |
CN100366882C (zh) | 2008-02-06 |
CN1630776A (zh) | 2005-06-22 |
EP1579111A1 (de) | 2005-09-28 |
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