DE102006003861A1 - Operating method for fuel injection valve with computer program memory and control especially for a motor vehicle follows voltage or current at piezoelectric element over time to fix valve-closing point - Google Patents
Operating method for fuel injection valve with computer program memory and control especially for a motor vehicle follows voltage or current at piezoelectric element over time to fix valve-closing point Download PDFInfo
- Publication number
- DE102006003861A1 DE102006003861A1 DE200610003861 DE102006003861A DE102006003861A1 DE 102006003861 A1 DE102006003861 A1 DE 102006003861A1 DE 200610003861 DE200610003861 DE 200610003861 DE 102006003861 A DE102006003861 A DE 102006003861A DE 102006003861 A1 DE102006003861 A1 DE 102006003861A1
- Authority
- DE
- Germany
- Prior art keywords
- voltage
- piezoelectric element
- current
- injection valve
- valve
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 36
- 239000007924 injection Substances 0.000 title claims abstract description 36
- 239000000446 fuel Substances 0.000 title claims abstract description 22
- 238000004590 computer program Methods 0.000 title claims abstract description 6
- 238000011017 operating method Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000001960 triggered effect Effects 0.000 claims 1
- 230000008569 process Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000004913 activation Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002996 emotional effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 208000010201 Exanthema Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000005884 exanthem Diseases 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 230000009467 reduction 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
-
- 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
- F02D2041/2034—Control of the current gradient
-
- 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
- F02D2041/2051—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using voltage control
-
- 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
- F02D2041/2055—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit with means for determining actual opening or closing time
-
- 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
Abstract
Description
Die Erfindung geht aus von einem Verfahren zum Betreiben einer Kraftstoffeinspritzvorrichtung insbesondere eines Kraftfahrzeug nach den Merkmalen des Oberbegriffs des Anspruchs 1. Die Erfindung betrifft ebenfalls ein entsprechendes Computerprogramm, einen entsprechenden elektrischen Speicher sowie ein entsprechendes Steuergerät.The The invention is based on a method for operating a fuel injection device in particular a motor vehicle according to the features of the preamble of the claim 1. The invention also relates to a corresponding computer program, a corresponding electrical memory and a corresponding Control unit.
Stand der Technikwas standing of the technique
Ein
derartiges Verfahren ist aus der
Zur Bestimmung der eingespritzten Kraftstoffmasse ist es erforderlich, den Schließzeitpunkt des Einspritzventils zu ermitteln.to Determination of the injected fuel mass it is necessary the closing time of the Injector to determine.
Aufgabe der Erfindung ist es, ein Verfahren zum Betreiben einer Kraftstoffeinspritzvorrichtung insbesondere für ein Kraftfahrzeug zu schaffen, mit dem der Schließzeitpunkt des Einspritzventils auf einfache Weise möglichst genau festgestellt werden kann.task The invention is a method for operating a fuel injection device in particular for a To create motor vehicle, with the closing time of the injection valve in a simple way possible can be determined exactly.
Offenbarung der Erfindungepiphany the invention
Diese Aufgabe wird bei einem Verfahren der eingangs genannten Art erfindungsgemäß durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 gelöst. Die Aufgabe wird bei einem Computerprogramm, bei einem elektrischen Speicher und bei einem Steuergerät entsprechend gelöst.These Task is in accordance with the invention in a method of the type mentioned the features of the characterizing part of claim 1 solved. The Task becomes with a computer program, with an electrical one Memory and at a control unit solved accordingly.
Vorteile der ErfindungAdvantages of invention
Erfindungsgemäß wurde erkannt, dass die Ansteuerung des piezoelektrischen Elements zur Auslösung eines Schließvorgangs der Düsennadel bereits abgeschlossen ist, wenn die Düsennadel – ausgehend aus einem geöffneten Zustand – noch gar nicht seine Schließstellung erreicht hat. Das auf diese Weise bis zum nächsten Einspritzvorgang entstehende Zeitfenster kann genutzt werden, um den Schließzeitpunkt der Düsennadel zu ermitteln. Durch Ermittlung des Schließzeitpunkts der Düsennadel (also nicht eines möglicherweise der Düsennadel hydraulisch vorgeschalteten Verschließgliedes) kann ein Parameter genau bestimmt werden, der zur Bestimmung einer während eines Einspritzvorgangs eingespritzten Kraftstoffmenge benötigt wird.According to the invention was recognized that the activation of the piezoelectric element for triggering a closing process the nozzle needle already is completed when the nozzle needle - starting from an open one Condition - still not at all its closed position has reached. The resulting in this way until the next injection process Time window can be used to close the closing time of the nozzle needle to investigate. By determining the closing time of the nozzle needle (not one, maybe the nozzle needle hydraulically upstream closure member) can be a parameter be precisely determined to determine one during a Injection process injected fuel amount is needed.
Durch Kenntnis dieses Parameters ist es bspw. möglich, verschiedene Einspritzventile eines Kraftstoffeinspritzsystems für einen Mengenabgleich aufeinander abzustimmen. Ein weiterer Vorteil besteht darin, dass die in der Fertigung der Einspritzventile vorgegebenen Einspritzmengentoleranzen angehoben werden können, was die Wirtschaftlichkeit der Fertigung erhöht. Auch ist es möglich, einem sich ändernden Einspritzverhalten des Einspritzventils durch entsprechende Anpassung der Ansteuerung des piezoelektrischen Elements zu begegnen. Eine solche Änderung kann sich im Laufe des Betriebs des Einspritzventils ("Mengendrift") oder auch bei sich ändernden Temperaturverhältnissen auftreten. Durch eine entsprechende Anpassung der Ansteuerung ist gewährleistet, dass vorgegebene Emissionsgrenzen auch nach sehr langer Betriebsdauer eingehalten werden können.By Knowledge of this parameter, it is, for example, possible, different injectors a fuel injection system for a balance between each other vote. Another advantage is that in the Production of the injectors raised predetermined injection quantity tolerances can be which increases the profitability of production. It is also possible for a changing one Injection behavior of the injection valve by appropriate adaptation to counteract the driving of the piezoelectric element. A such change may change during operation of the injector ("drift") or even when changing temperature conditions occur. By a corresponding adjustment of the control is guaranteed that specified emission limits are maintained even after a very long service life can be.
Weiterhin ist es durch die genaue Kenntnis des Schließzeitpunkts der Düsennadel möglich, Brennkraftmaschinen im Hinblick auf eine optimale Leistung zu applizieren.Farther It is due to the exact knowledge of the closing time of the nozzle needle possible, internal combustion engines to apply for optimal performance.
Ein wesentlicher Vorteil des erfindungsgemäßen Verfahrens besteht darin, dass kein zusätzlicher Sensor oder dergleichen für die Ermittlung des Schließzeitpunkts der Düsennadel erforderlich ist.One An essential advantage of the method according to the invention is that no extra Sensor or the like for the determination of the closing time the nozzle needle is required.
Nach einer besonders vorteilhaften Ausführungsform der Erfindung wird die an dem piezoelektrischen Element anliegende Spannung dahingehend überprüft wird, ob die Spannung nach Absenkung aus einer Ausgangsspannung auf einen niedrigeren konstanten Spannungswert Abweichungen von diesem Spannungswert erfährt. Die Zeitdauer, während der die Ausgangsspannung auf einen niedrigeren Spannungswert abgesenkt wird, korrespondiert mit der Ansteuerung des piezoelektrischen Elements zur Auslösung des Schließvorgangs der Düsennadel. Nach Abschluss dieses Vorgangs kann der erreichte, niedrigere Spannungswert im Hinblick auf Abweichungen überwacht werden, die durch den Schließvorgang der Düsennadel bewirkt sind. Der genannte niedrigere Spannungswert kann beispielsweise gleich Null sein, so dass in dieser Zeit an dem piezoelektrischen Element keine Spannung anliegt. Es ist aber auch möglich, die genannte Überwachung bei von Null abweichenden Spannungswerten durchzuführen. Ebenso kann die Spannung zunächst bis auf Null gesenkt und dann auf einen bestimmten Spannungswert angehoben werden.According to a particularly advantageous embodiment of the invention, the voltage applied to the piezoelectric element voltage is checked to see whether the voltage undergoes deviations from this voltage value after lowering from an output voltage to a lower constant voltage value. The period of time during which the output voltage is lowered to a lower voltage value corresponds to the activation of the piezoelectric element for triggering the closing operation of the nozzle needle. After completion of this process, the achieved, lower voltage value with respect to rejection monitored, which are caused by the closing operation of the nozzle needle. For example, said lower voltage value may be equal to zero, so that no voltage is applied to the piezoelectric element during this time. But it is also possible to perform the said monitoring at non-zero voltage values. Likewise, the voltage can first be lowered to zero and then raised to a certain voltage level.
Zeichnungendrawings
Weitere Merkmale, Anwendungsmöglichkeiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen der Erfindung, die in den im Folgenden beschriebenen Figuren dargestellt sind. Dabei bilden alle beschriebenen oder dargestellten Merkmale für sich oder in beliebiger Kombination den Gegenstand der Erfindung, unabhängig von ihrer Zusammenfassung in den Patentansprüchen oder deren Rückbeziehung sowie unabhängig von ihrer Formulierung bzw. Darstellung in der Beschreibung bzw. in der Zeichnung.Further Features, applications and advantages of the invention will become apparent from the following description of exemplary embodiments of the invention shown in the figures described below are. All described or illustrated features form for themselves or in any combination, the subject matter of the invention, regardless of their summary in the claims or their dependency as well as independently from their formulation or presentation in the description or in the drawing.
Beschreibung der Ausführungsbeispieledescription the embodiments
Das
Einspritzventil
Über einen
Durchlass im zweiten Ventilsitz
In
Abhängigkeit
von der an dem Element
In
dem Anschlussstück
Das
im Folgenden beschriebene Verfahren zur Erfassung des Schließzeitpunkts
der Düsennadel
Der
zeitliche Verlauf der zwischen den Anschlussklemmen
Die
folgende Absenkung der Spannung U, also die Entladung des piezoelektrischen
Elements
Die
Absenkung der Spannung U ist zu dem Zeitpunkt t1 bereits
abgeschlossen. Der Zeitpunkt t2, an dem
die Düsennadel
Nach einem ersten Beispiel wird die Ausgangsspannung UA auf einen niedrigeren, konstanten Spannungswert UC1 von 0 Volt abgesenkt.According to a first example, the output voltage U A is lowered to a lower, constant voltage value U C1 of 0 volts.
Nach einem zweiten Beispiel wird die Ausgangsspannung UA auf einen niedrigeren, konstanten Spannungswert UC2 von größer 0 Volt abgesenkt.According to a second example, the output voltage U A is lowered to a lower, constant voltage value U C2 of greater than 0 volts.
Nach einem dritten Beispiel wird die Ausgangsspannung UA zunächst auf einen Wert von 0 Volt abgesenkt und anschließend auf einen konstanten Spannungswert UC3 von größer 0 Volt angehoben.According to a third example, the output voltage U A is first lowered to a value of 0 volts and then raised to a constant voltage value U C3 greater than 0 volts.
Für alle drei
Beispiele ergeben sich in den zugeordneten Spannungsverläufen Abweichungen von
den jeweiligen Spannungswerten UC1, UC2 und UC3. Diese
Abweichungen sind in der
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE200610003861 DE102006003861A1 (en) | 2006-01-27 | 2006-01-27 | Operating method for fuel injection valve with computer program memory and control especially for a motor vehicle follows voltage or current at piezoelectric element over time to fix valve-closing point |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE200610003861 DE102006003861A1 (en) | 2006-01-27 | 2006-01-27 | Operating method for fuel injection valve with computer program memory and control especially for a motor vehicle follows voltage or current at piezoelectric element over time to fix valve-closing point |
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Publication Number | Publication Date |
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DE102006003861A1 true DE102006003861A1 (en) | 2007-08-02 |
Family
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DE200610003861 Ceased DE102006003861A1 (en) | 2006-01-27 | 2006-01-27 | Operating method for fuel injection valve with computer program memory and control especially for a motor vehicle follows voltage or current at piezoelectric element over time to fix valve-closing point |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008071532A1 (en) | 2006-12-12 | 2008-06-19 | Robert Bosch Gmbh | Method for operating a fuel injection valve |
WO2010091902A1 (en) * | 2009-02-10 | 2010-08-19 | Robert Bosch Gmbh | Method for determining a needle closing in a piezo injector |
DE102011007580A1 (en) | 2011-04-18 | 2012-10-18 | Robert Bosch Gmbh | Method for operating fuel injection valve of combustion engine, involves determining coking of injector nozzle of injection valve using one of partial models, and using output of partial model to correct control of actuator |
DE102011085926A1 (en) | 2011-11-08 | 2013-05-08 | Robert Bosch Gmbh | Method for operating an internal combustion engine |
US20140043000A1 (en) * | 2012-08-13 | 2014-02-13 | Continental Automotive Systems, Inc. | Current controller having programmable current-control parameters and hardware-implemented support functions |
DE102013217746B3 (en) * | 2013-09-05 | 2014-12-24 | Continental Automotive Gmbh | Method for operating an internal combustion engine |
DE102008001412B4 (en) * | 2008-04-28 | 2016-12-15 | Robert Bosch Gmbh | Method and device for operating an injection valve |
DE102014220363B4 (en) * | 2013-10-16 | 2016-12-15 | Ford Global Technologies, Llc | Method for direct introduction of fuel into a cylinder of a direct-injection internal combustion engine |
WO2017178140A1 (en) * | 2016-04-15 | 2017-10-19 | Continental Automotive Gmbh | Method for ascertaining the servo valve closing time in piezo-driven injectors, and fuel injection system |
WO2017182195A1 (en) * | 2016-04-18 | 2017-10-26 | Continental Automotive Gmbh | Method for operating a diesel common-rail piezo-operated servo injector, and motor vehicle |
US10808640B2 (en) | 2016-05-31 | 2020-10-20 | Continental Automotive France | Method for detecting malfunction of a software solution for estimating the instant of interruption of fuel injection of an internal combustion engine |
DE102014214248B4 (en) | 2014-03-31 | 2021-08-12 | Hyundai Motor Company | DEVICE FOR CORRECTING INJECTOR CHARACTERISTICS |
-
2006
- 2006-01-27 DE DE200610003861 patent/DE102006003861A1/en not_active Ceased
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008071532A1 (en) | 2006-12-12 | 2008-06-19 | Robert Bosch Gmbh | Method for operating a fuel injection valve |
US8483933B2 (en) | 2006-12-12 | 2013-07-09 | Robert Bosch Gmbh | Method for operating a fuel injector |
DE102008001412B4 (en) * | 2008-04-28 | 2016-12-15 | Robert Bosch Gmbh | Method and device for operating an injection valve |
WO2010091902A1 (en) * | 2009-02-10 | 2010-08-19 | Robert Bosch Gmbh | Method for determining a needle closing in a piezo injector |
CN102308403A (en) * | 2009-02-10 | 2012-01-04 | 罗伯特·博世有限公司 | Method for determining a needle closing in a piezo injector |
JP2012517556A (en) * | 2009-02-10 | 2012-08-02 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Method for detecting needle valve closure in a piezo injector |
DE102011007580A1 (en) | 2011-04-18 | 2012-10-18 | Robert Bosch Gmbh | Method for operating fuel injection valve of combustion engine, involves determining coking of injector nozzle of injection valve using one of partial models, and using output of partial model to correct control of actuator |
DE102011085926A1 (en) | 2011-11-08 | 2013-05-08 | Robert Bosch Gmbh | Method for operating an internal combustion engine |
WO2013068173A1 (en) | 2011-11-08 | 2013-05-16 | Robert Bosch Gmbh | Method and device for operating an internal combustion engine |
US20140043000A1 (en) * | 2012-08-13 | 2014-02-13 | Continental Automotive Systems, Inc. | Current controller having programmable current-control parameters and hardware-implemented support functions |
US9103295B2 (en) * | 2012-08-13 | 2015-08-11 | Continental Automotive Systems, Inc. | Current controller having programmable current-control parameters and hardware-implemented support functions |
DE102013217746B3 (en) * | 2013-09-05 | 2014-12-24 | Continental Automotive Gmbh | Method for operating an internal combustion engine |
DE102014220363B4 (en) * | 2013-10-16 | 2016-12-15 | Ford Global Technologies, Llc | Method for direct introduction of fuel into a cylinder of a direct-injection internal combustion engine |
DE102014214248B4 (en) | 2014-03-31 | 2021-08-12 | Hyundai Motor Company | DEVICE FOR CORRECTING INJECTOR CHARACTERISTICS |
WO2017178140A1 (en) * | 2016-04-15 | 2017-10-19 | Continental Automotive Gmbh | Method for ascertaining the servo valve closing time in piezo-driven injectors, and fuel injection system |
KR20180120758A (en) * | 2016-04-15 | 2018-11-06 | 콘티넨탈 오토모티브 게엠베하 | A method for confirming the closing time of a servo valve of a piezoelectric-driven injector and a fuel injection system |
CN108884771A (en) * | 2016-04-15 | 2018-11-23 | 大陆汽车有限公司 | The method and fuel injection system of the servo valve closing time in injector for determining Piezoelectric Driving |
US10557432B2 (en) | 2016-04-15 | 2020-02-11 | Continental Automotive Gmbh | Fuel injection systems |
KR102117185B1 (en) | 2016-04-15 | 2020-06-02 | 콘티넨탈 오토모티브 게엠베하 | Method and fuel injection system for checking the closing time of the servovalve of piezo-driven injectors |
WO2017182195A1 (en) * | 2016-04-18 | 2017-10-26 | Continental Automotive Gmbh | Method for operating a diesel common-rail piezo-operated servo injector, and motor vehicle |
KR20180122695A (en) * | 2016-04-18 | 2018-11-13 | 콘티넨탈 오토모티브 게엠베하 | Diesel Common-Rail Piezo-Actuated Servo Injector Method And Automobile |
CN109072837A (en) * | 2016-04-18 | 2018-12-21 | 大陆汽车有限公司 | Method and motor vehicles for the operated servo ejector of operating diesel machine common rail piezoelectricity |
KR102124271B1 (en) | 2016-04-18 | 2020-06-17 | 콘티넨탈 오토모티브 게엠베하 | How to operate a diesel common-rail piezo-operated servo injector |
US10746120B2 (en) | 2016-04-18 | 2020-08-18 | Continental Automotive Gmbh | Diesel common-rail piezo-operated servo injector |
US10808640B2 (en) | 2016-05-31 | 2020-10-20 | Continental Automotive France | Method for detecting malfunction of a software solution for estimating the instant of interruption of fuel injection of an internal combustion engine |
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