WO2009135732A1 - Verfahren und vorrichtung zur überwachung eines piezoaktors - Google Patents
Verfahren und vorrichtung zur überwachung eines piezoaktors Download PDFInfo
- Publication number
- WO2009135732A1 WO2009135732A1 PCT/EP2009/053728 EP2009053728W WO2009135732A1 WO 2009135732 A1 WO2009135732 A1 WO 2009135732A1 EP 2009053728 W EP2009053728 W EP 2009053728W WO 2009135732 A1 WO2009135732 A1 WO 2009135732A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piezoelectric actuator
- voltage
- time
- checked whether
- value
- 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.)
- Ceased
Links
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
-
- 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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven 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
- H10N30/80—Constructional details
- H10N30/802—Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits
-
- 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
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2058—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using information of the actual current value
-
- 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
- F02D2041/2086—Output circuits, e.g. for controlling currents in command coils with means for detecting circuit failures
- F02D2041/2093—Output circuits, e.g. for controlling currents in command coils with means for detecting circuit failures detecting short circuits
Definitions
- the invention is based on a device or a method according to the preamble of the independent claims.
- a method for loading and unloading a piezoelectric element is known.
- the charge current charging the piezoelectric element or the discharge current discharging the piezoelectric element is conducted via a device having inductive properties.
- an improper piezoelectric element is detected if the determined time course and / or the progress of the loading and / or unloading deviates from an intended course and / or progress.
- the charging switch and the associated discharge switch are important components of a corresponding device for driving a piezoelectric EIe- ment. Each activation activates the two switches. Defects of such a switch are problematic. Particularly problematic is an error in which the charging switch is short-circuited or remains in its on position. This error is particularly problematic if at the same time an error of the discharge switch occurs and this remains in its open state. In this case, the complete buffer voltage is at the plug of the
- Control unit or on the piezoelectric actuator Such an error must be reliably detected in any case. In particular, this error must be constantly detected during operation.
- the device according to the invention and the method according to the invention with the features of the independent claims has the advantage that a fault of the piezoelectric actuator or its drive circuit can be reliably detected.
- by checking three conditions it is possible to distinguish this error from other errors. It is particularly advantageous if it is checked whether the voltage at the piezoelectric actuator assumes an inadmissible value, that it is checked whether an error signal is present, and that it is checked that the discharge time assumes an inadmissible value.
- FIG. 1 shows a block diagram of the essential elements of a circuit for driving a piezoelectric actuator, and Figure 2 and 3 different applied over time signals.
- FIG. 1 shows the essential elements of a circuit arrangement for controlling a piezoactuator.
- the piezoelectric actuator is designated by 100.
- the first connection of the piezoelectric actuator is connected on the one hand to a charging switch 110 and a discharge switch 120.
- the common point between the charge switch 110 and the discharge switch 120 is preferably se connected via an inductance 130 with the first terminal of the piezoelectric actuator 100.
- the connection of the charging switch 110 facing away from the common point is connected to a first terminal of a buffer capacitor 140.
- the second terminal of the discharge switch 120 which faces away from the common point, is connected to the second terminal of the buffer capacitor 140.
- the two terminals of the buffer capacitor 140 are connected to a converter 150.
- the charging switch and discharge switch are controlled by a power amplifier module 160.
- a voltage detection means 170 is provided, which detects the voltage applied to the piezoelectric actuator 100. This acts on a monitoring unit 180 with a corresponding signal. Furthermore, the monitoring 180 evaluates an output signal of
- the circuit shown in Figure 1 is used to control a piezoelectric actuator. By appropriate modification of the circuit, this circuit can also for
- piezo actuators Control of several piezo actuators are used.
- a charge / discharge switch and an inductance 130 is provided for a plurality of piezo actuators.
- the piezo actuators to be controlled are selected by appropriate switching means, in particular by so-called selection switches.
- a plurality of piezo actuators are combined to form a bank and the components shown correspondingly are provided in each case for a plurality of piezoactuators.
- the converter 150 charges the buffer capacitor 140 to a certain voltage.
- the piezoelectric actuator 100 is charged to a predetermined voltage. If the voltage at the piezoelectric actuator 100 reaches the predetermined voltage, the charging process is terminated and the charging switch usually remains in its open state. If the piezoelectric actuator is to be discharged, the discharge switch is correspondingly activated and the piezoelectric actuator is likewise discharged via the inductance 130 and the discharge switch 120.
- the voltage curve of a fault-free operation is shown by way of example in FIG.
- Tl the charging process of the piezoelectric actuator begins.
- T2 the voltage at the piezoelectric actuator reaches a predetermined value.
- the charging process ends.
- the time period between the time Tl and the time T2 is called the charging time.
- T3 the voltage at the piezo actuator drops to the value US.
- the activation of the piezoelectric actuator ends and by operating the discharge switch 120, the voltage drops to zero until the time T4.
- the time between the time T3 and T4 is commonly referred to as the discharge time.
- the voltage at the piezoelectric actuator increases to the value of the voltage at the buffer capacitor U B.
- the voltage at the piezo actuator remains at this value. Discharge from time T3 is no longer possible, in particular in the case of an additional defect of the discharge switch, which remains in an open position.
- the discharge time which preferably corresponds to a signal provided by the output module 160, which is measured by the monitoring unit 180, and the time period between the start of the discharge process and the end of the discharge process, at which the voltage at the piezoelectric actuator their Abschaltwert reached.
- This value of the discharge time is usually set by the power amplifier module to a specified value, which is then output by the power amplifier module, if the discharge time can not be measured.
- the monitoring unit 180 the discharge time is compared with a threshold value for fault monitoring.
- the voltage applied to the piezoelectric actuator is preferably at the time point T2 compared with a predetermined value. This predetermined value is in the range above the usual Sollabschaltschreib. If this value is significantly greater than this predetermined value, then a second condition is recognized as present.
- the output module 160 performs a diagnosis of the device. For this purpose, it is provided that different voltage and current values are detected and an error of the arrangement is detected in an implausibility. In this case an error bit is set. The third condition is checked whether this error bit is set.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09741950A EP2274510B1 (de) | 2008-05-06 | 2009-03-30 | Verfahren und vorrichtung zur überwachung eines piezoaktors |
| US12/991,485 US20110101992A1 (en) | 2008-05-06 | 2009-03-30 | Method and device for monitoring a piezo actuator |
| CN2009801162937A CN102016273A (zh) | 2008-05-06 | 2009-03-30 | 用于监控压电执行器的方法和装置 |
| AT09741950T ATE548551T1 (de) | 2008-05-06 | 2009-03-30 | Verfahren und vorrichtung zur überwachung eines piezoaktors |
| JP2011507855A JP2011520274A (ja) | 2008-05-06 | 2009-03-30 | 圧電アクチュエータの監視方法および装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008001571.7 | 2008-05-06 | ||
| DE102008001571A DE102008001571A1 (de) | 2008-05-06 | 2008-05-06 | Verfahren und Vorrichtung zur Überwachung eines Piezoaktors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009135732A1 true WO2009135732A1 (de) | 2009-11-12 |
Family
ID=40749193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2009/053728 Ceased WO2009135732A1 (de) | 2008-05-06 | 2009-03-30 | Verfahren und vorrichtung zur überwachung eines piezoaktors |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20110101992A1 (de) |
| EP (1) | EP2274510B1 (de) |
| JP (1) | JP2011520274A (de) |
| KR (1) | KR20110021750A (de) |
| CN (1) | CN102016273A (de) |
| AT (1) | ATE548551T1 (de) |
| DE (1) | DE102008001571A1 (de) |
| WO (1) | WO2009135732A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2476105A (en) * | 2009-12-14 | 2011-06-15 | Gm Global Tech Operations Inc | Fault management in an i.c. engine piezoelectric fuel injection system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008042981A1 (de) * | 2008-10-21 | 2010-04-22 | Robert Bosch Gmbh | Verfahren und Steuervorrichtung zur Ansteuerung eines Kraftstoffinjektors |
| SE534927C2 (sv) * | 2010-06-29 | 2012-02-21 | Scania Cv Ab | Mätanordning och metod för ett bränsleinsprutningssystem |
| WO2013108086A1 (en) * | 2012-01-20 | 2013-07-25 | Rosemount Inc. | Field device with self-testing of a piezoelectric transducer |
| PL2915255T3 (pl) * | 2012-10-31 | 2017-06-30 | Diehl Ako Stiftung & Co. Kg | Układ wyczuwający klawisz piezoelektryczny i sposób testowania układu wyczuwającego klawisz piezoelektryczny |
| AT521038B1 (de) | 2018-10-02 | 2019-10-15 | Siemens Mobility GmbH | Verfahren und Vorrichtung zur Detektion von Störungen eines Sensors |
| DE102020134066A1 (de) * | 2020-12-17 | 2022-06-23 | Endress+Hauser Flowtec Ag | Vortex-Durchflussmessgerät und Verfahren zum Überprüfen eines Vortex-Durchflussmessgeräts |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19910388A1 (de) * | 1999-03-09 | 2000-09-21 | Siemens Ag | Verfahren zum Ansteuern eines kapazitiven Stellgliedes |
| US6384512B1 (en) * | 2000-12-22 | 2002-05-07 | Denso Corporation | Driving apparatus for piezo-actuator having abnormality detecting function |
| DE10256331A1 (de) * | 2002-12-03 | 2004-06-17 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung eines Verbrauchers |
| DE102004054372B3 (de) * | 2004-11-10 | 2006-06-14 | Siemens Ag | Verfahren und Vorrichtung zum Bestimmen eines Kraftstoffmassenstroms bei einer Brennkraftmaschine |
| US20070227506A1 (en) * | 2006-04-03 | 2007-10-04 | Louisa Perryman | Drive circuit for an injector arrangement and a diagnostic method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19733560B4 (de) * | 1997-08-02 | 2007-04-05 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Laden und Entladen eines piezoelektrischen Elements |
| DE19845042C2 (de) * | 1998-09-30 | 2000-08-24 | Siemens Ag | Verfahren und Anordnung zur Diagnose eines kapazitiven Aktors |
| DE60011993T2 (de) * | 2000-04-01 | 2004-12-09 | Robert Bosch Gmbh | Apparat und Methode für das Ermitteln einer Verringerung der Kapazität während des Antriebes von piezoelektrischen Elementen |
| DE102005053405B4 (de) * | 2005-11-09 | 2019-01-03 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Überwachung eines Kraftstoffzumesssystems |
-
2008
- 2008-05-06 DE DE102008001571A patent/DE102008001571A1/de not_active Withdrawn
-
2009
- 2009-03-30 JP JP2011507855A patent/JP2011520274A/ja not_active Withdrawn
- 2009-03-30 AT AT09741950T patent/ATE548551T1/de active
- 2009-03-30 CN CN2009801162937A patent/CN102016273A/zh active Pending
- 2009-03-30 KR KR1020107024871A patent/KR20110021750A/ko not_active Withdrawn
- 2009-03-30 EP EP09741950A patent/EP2274510B1/de not_active Not-in-force
- 2009-03-30 WO PCT/EP2009/053728 patent/WO2009135732A1/de not_active Ceased
- 2009-03-30 US US12/991,485 patent/US20110101992A1/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19910388A1 (de) * | 1999-03-09 | 2000-09-21 | Siemens Ag | Verfahren zum Ansteuern eines kapazitiven Stellgliedes |
| US6384512B1 (en) * | 2000-12-22 | 2002-05-07 | Denso Corporation | Driving apparatus for piezo-actuator having abnormality detecting function |
| DE10256331A1 (de) * | 2002-12-03 | 2004-06-17 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung eines Verbrauchers |
| DE102004054372B3 (de) * | 2004-11-10 | 2006-06-14 | Siemens Ag | Verfahren und Vorrichtung zum Bestimmen eines Kraftstoffmassenstroms bei einer Brennkraftmaschine |
| US20070227506A1 (en) * | 2006-04-03 | 2007-10-04 | Louisa Perryman | Drive circuit for an injector arrangement and a diagnostic method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2476105A (en) * | 2009-12-14 | 2011-06-15 | Gm Global Tech Operations Inc | Fault management in an i.c. engine piezoelectric fuel injection system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011520274A (ja) | 2011-07-14 |
| DE102008001571A1 (de) | 2009-11-12 |
| EP2274510B1 (de) | 2012-03-07 |
| ATE548551T1 (de) | 2012-03-15 |
| KR20110021750A (ko) | 2011-03-04 |
| US20110101992A1 (en) | 2011-05-05 |
| CN102016273A (zh) | 2011-04-13 |
| EP2274510A1 (de) | 2011-01-19 |
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