EP1375882B1 - Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs - Google Patents
Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs Download PDFInfo
- Publication number
- EP1375882B1 EP1375882B1 EP03009204A EP03009204A EP1375882B1 EP 1375882 B1 EP1375882 B1 EP 1375882B1 EP 03009204 A EP03009204 A EP 03009204A EP 03009204 A EP03009204 A EP 03009204A EP 1375882 B1 EP1375882 B1 EP 1375882B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- actuator
- nozzle needle
- injection valve
- combustion engine
- 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.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 26
- 238000000034 method Methods 0.000 title claims description 10
- 239000000446 fuel Substances 0.000 claims description 30
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 238000004590 computer program Methods 0.000 claims description 3
- 230000001052 transient effect Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000008859 change Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 6
- 230000004913 activation Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
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
Definitions
- the invention is based on a method for operating an internal combustion engine, in particular of a motor vehicle, at the fuel from an injection valve into a Brennraum is injected, in which a nozzle needle of the Injection valve of a piezoelectric actuator is adjusted, and wherein the actuator for adjusting the Nozzle needle and thus for the injection of fuel from an electrical voltage is applied.
- the Invention also relates to a corresponding Internal combustion engine and a corresponding control device for an internal combustion engine.
- the object of the invention is to provide a method and a Internal combustion engine to create a processing of Allow residual potential without additional effort.
- This task is used in a method of the beginning mentioned type according to the invention achieved in that the Actuator is subjected to a first voltage, the does not cause adjustment of the injector nozzle needle, and that the actor after a period of time with a second voltage is applied to the Adjustment of the nozzle needle causes.
- the first voltage causes the voltage on the actuator to increase set a defined value.
- the one before the next Control voltage applied to the actuator is so known and can be considered. This will then achieved in that the voltage with which the Actuator to be controlled, in addition to the first Tension is added. This results in a change the voltage at the actuator exactly to that value, the is provided. This ensures overall that through the control with the added, second voltage the Desired amount of fuel in the combustion chamber of the Internal combustion engine is injected. An additional one Effort is not required for this purpose.
- the first voltage is chosen so small that the Nozzle needle of the injector in any case not moved or is adjusted.
- the first tension is on the other hand chosen so large that a residual potential in the Actuator from his last control, if necessary exists, is exceeded in any case.
- the invention may also be in the form of a computer program be realized on a digital, electronic Storage medium is stored, and its Program commands are executable on a computer.
- FIG. 1 shows a device which is suitable for an internal combustion engine, in particular a motor vehicle is provided.
- the internal combustion engine is with at least an injection valve, with the fuel in one Combustion chamber of the internal combustion engine is injected.
- On the Fuel is subjected to a pressure which is suitable the fuel even during the compression phase of the Inject internal combustion engine into the combustion chamber.
- the injection valve has a nozzle needle, which in the Injection valve can be moved back and forth.
- the fuel In one opened state of the nozzle needle, the fuel is in the combustion chamber injected, in a closed state No fuel is injected.
- the amount of Injected fuel depends on the position of the fuel Nozzle needle in the open state.
- the injection valve has a piezoelectric actuator on, which is provided for adjusting the nozzle needle.
- a piezoelectric actuator on, which is provided for adjusting the nozzle needle.
- the actuator can be connected to an electrical voltage which is a change in the extent of the Actors entails. This change of extent will transferred to the nozzle needle, so that the nozzle needle in passes over her open state.
- the amount of injected is Fuel depends on the position of the nozzle needle. These Position is in turn dependent on the change of Expansion of the actuator. The change of extent is finally depending on the change of that voltage, which rests against the actuator. The amount of injected Fuel is thus a function of the change in the Actuator voltage applied.
- a voltage supply is UV provided that at least two voltages available represents, namely a first voltage U1 and a second Voltage U2.
- a control unit SG controls a switch S. on, with one of the two voltages U1, U2 as Actuator voltage UA is forwarded.
- the actuator voltage UA is due to the piezoelectric actuator A of the described injection valve on.
- the power supply UV and the actuator A are exemplary in FIG Ground switched.
- the actuator voltage UA applied over time t Before a time t1 is the Size of the actuator voltage UA unknown. After this Time t1, the actuator voltage UA, the value of the first Voltage U1 on. After a time t2, the Actuator voltage UA the value of the second voltage U2. The Difference between the first voltage U1 and the second Voltage U2 corresponds to a voltage US.
- the first voltage U1 is chosen to be so small that the nozzle needle of the injector in any case not moved or misaligned.
- the first voltage U1 So only leads to a change in the extent of the actuator A, which may indicate a change in the state of hydraulic coupler has the consequence. Neither the change the extent of the actor A itself, nor the change However, the state of the hydraulic coupler have one Change in the position of the nozzle needle within the Injection valve result.
- the first voltage U1 can in particular depending on Operating variables of the internal combustion engine are determined for example, depending on the on the fuel acting pressure.
- the first voltage U1 can handle it also change over time.
- the first voltage U1 is chosen to be so large that a residual potential contained in the actor A of his last activation possibly still exists, in every case is exceeded. Such a residual potential can arise from the fact that the actuator A after a Not fully charged with a voltage unloaded.
- the second voltage U2 is chosen as follows:
- the amount of injected is Fuel a function of the change in the actuator A applied voltage.
- the voltage US When changing the on the actuator A applied voltage is the voltage US. It is thus determined in a first step, which Tension US is required to reach the desired amount To obtain fuel to be injected. In a second Step then this voltage is US to the first voltage U1 added. This results in the second voltage U2, the then applied to the actuator A.
- the reference character O is the opened one Condition of the nozzle needle or the injection valve and with the reference Z is the closed state characterized. It depends, as already mentioned, the exact position of the nozzle needle within the Injection valve in the open state of the on the Actuator A applied voltage from.
- the time duration dt1 is chosen such that Transient events due to the first voltage U1 the resulting change in the extent of the Aktors A and the resulting if necessary Changing the state of the hydraulic coupler in any a way have arisen within the injector, in each case have largely subsided.
- Piezo actuators can with voltage regulation, charge control or energy regulation. Independently of certain voltages U1, U2 are needed to work with a given current and an existing electrical Capacity of the actuator to set a stroke. The hub will then in further injection pulses to a setpoint regulated. In doing so, a certain current is impressed and it gets a certain delta voltage U2-U1 and the note needed via the voltage U1.
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)
Description
Claims (8)
- Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs, bei dem Kraftstoff von einem Einspritzventil in einen Brennraum eingespritzt wird, bei dem eine Düsennadel des Einspritzventils von einem piezo-elektrischen Aktor (A) verstellt wird, und bei dem der Aktor (A) zur Verstellung der Düsennadel und damit zur Einspritzung von Kraftstoff von einer elektrischen Spannung beaufschlagt wird, dadurch gekennzeichnet, dass der Aktor (A) mit einer ersten Spannung (U1) beaufschlagt wird, die keine Verstellung der Düsennadel des Einspritzventils hervorruft, und dass der Aktor (A) nach einer Zeitdauer (dt1) mit einer zweiten Spannung (U2) beaufschlagt wird, die die Verstellung der Düsennadel hervorruft.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die zweite Spannung (U2) derart gewählt wird, dass die Differenz zwischen der zweiten und der ersten Spannung (U2, U1) etwa derjenigen Spannung (US) entspricht, mit der der Aktor (A) für eine erwünschte Verstellung der Düsennadel angesteuert werden muss.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die erste Spannung (U1) in Abhängigkeit von Betriebsgrößen der Brennkraftmaschine eingestellt wird, insbesondere in Abhängigkeit von dem auf den Kraftstoff einwirkenden Druck.
- Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Zeitdauer (dt1) derart gewählt wird, dass Einschwingvorgänge innerhalb des Einspritzventils ausreichend abgeklungen sind.
- Computerprogramm mit Programmbefehlen, zur Anwendung in einem Verfahren nach einem der Ansprüche 1 bis 4 durchzuführen, wenn sie auf einem Computer ausgeführt werden.
- Computerprogramm nach Anspruch 5, dadurch gekennzeichnet, dass es auf einem digitalen, elektronischen Speichermedium, insbesondere einem Flash-Memory abgespeichert ist.
- Brennkraftmaschine insbesondere eines Kraftfahrzeugs, mit einem Einspritzventil zum Einspritzen von Kraftstoff in einen Brennraum, mit einer Düsennadel innerhalb des Einspritzventils, mit einem piezo-elektrischen Aktor (A) zum Verstellen der Düsennadel, und mit einem Steuergerät (SG), mittels dem der Aktor (A) zur Verstellung der Düsennadel und damit zur Einspritzung von Kraftstoff von einer elektrischen Spannung beaufschlagbar ist, dadurch gekennzeichnet, dass das Steuergerät (SG) derart ausgebildet ist, dass der Aktor (A) mit einer ersten Spannung (U1) beaufschlagt wird, die keine Verstellung der Düsennadel des Einspritzventils hervorruft, und dass der Aktor (A) nach einer Zeitdauer (dt1) mit einer zweiten Spannung (U2) beaufschlagt wird, die die Verstellung der Düsennadel hervorruft.
- Steuergerät zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs, wobei die Brennkraftmaschine mit einem Einspritzventil zum Einspritzen von Kraftstoff in einen Brennraum versehen ist, sowie mit einer Düsennadel innerhalb des Einspritzventils, sowie mit einem piezo-elektrischen Aktor (A) zum Verstellen der Düsennadel, und wobei mittels dem Steuergerät (SG) der Aktor (A) zur Verstellung der Düsennadel und damit zur Einspritzung von Kraftstoff von einer elektrischen Spannung beaufschlagbar ist, dadurch gekennzeichnet, dass das Steuergerät (SG) derart ausgebildet ist, dass der Aktor (A) mit einer ersten Spannung (U1) beaufschlagt wird, die keine Verstellung der Düsennadel des Einspritzventils hervorruft, und dass der Aktor (A) nach einer Zeitdauer (dt1) mit einer zweiten Spannung (U2) beaufschlagt wird, die die Verstellung der Düsennadel hervorruft.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10228063 | 2002-06-17 | ||
DE10228063A DE10228063A1 (de) | 2002-06-17 | 2002-06-17 | Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1375882A1 EP1375882A1 (de) | 2004-01-02 |
EP1375882B1 true EP1375882B1 (de) | 2005-03-16 |
EP1375882B2 EP1375882B2 (de) | 2008-11-19 |
Family
ID=29716623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03009204A Expired - Lifetime EP1375882B2 (de) | 2002-06-17 | 2003-04-23 | Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1375882B2 (de) |
JP (1) | JP4264303B2 (de) |
DE (2) | DE10228063A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004053349A1 (de) * | 2004-11-04 | 2006-05-18 | Siemens Ag | Verfahren und Vorrichtung zur Ansteuerung eines Kraftstoffinjektors einer Brennkraftmaschine |
JP4363331B2 (ja) * | 2005-01-17 | 2009-11-11 | トヨタ自動車株式会社 | 燃料噴射システム |
DE102005046933B4 (de) * | 2005-09-30 | 2015-10-15 | Continental Automotive Gmbh | Verfahren zum Ansteuern eines piezobetätigten Einspritzventils |
DE102007014330A1 (de) * | 2007-03-26 | 2008-10-02 | Robert Bosch Gmbh | Ansteuerschaltung und Ansteuerverfahren für ein piezoelektrisches Element |
JP2009074373A (ja) * | 2007-09-19 | 2009-04-09 | Hitachi Ltd | 内燃機関の燃料噴射制御装置 |
EP2077312A1 (de) | 2007-12-17 | 2009-07-08 | Nippon Oil Corporation | Brennstoffe für homogen geladene verdichtungsgezündete Maschinen |
DE102008044741B4 (de) * | 2008-08-28 | 2010-10-14 | Continental Automotive Gmbh | Verfahren und Steuergerät zum Steuern eines Injektors |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4732129A (en) * | 1985-04-15 | 1988-03-22 | Nippon Soken, Inc. | Control apparatus for electroexpansive actuator enabling variation of stroke |
EP0371469B1 (de) † | 1988-11-30 | 1995-02-08 | Toyota Jidosha Kabushiki Kaisha | Apparat zum Antreiben eines piezoelektrischen Elements zum Öffnen oder zum Schliessen eines Ventilteils |
US5779149A (en) † | 1996-07-02 | 1998-07-14 | Siemens Automotive Corporation | Piezoelectric controlled common rail injector with hydraulic amplification of piezoelectric stroke |
DE19714610A1 (de) * | 1997-04-09 | 1998-10-15 | Bosch Gmbh Robert | Verfahren und Vorrichtung zum Laden und Entladen eines piezoelektrischen Elements |
DE19903555C2 (de) * | 1999-01-29 | 2001-05-31 | Daimler Chrysler Ag | Vorrichtung zur Steuerung eines Piezoelement-Einspritzventils |
DE19905340C2 (de) † | 1999-02-09 | 2001-09-13 | Siemens Ag | Verfahren und Anordnung zur Voreinstellung und dynamischen Nachführung piezoelektrischer Aktoren |
DE19921242C1 (de) † | 1999-05-07 | 2000-10-26 | Siemens Ag | Verfahren zum Positionieren des Stellantriebs in einem Kraftstoffinjektor und Vorrichtung zur Durchführung des Verfahrens |
DE19958262B4 (de) * | 1999-12-03 | 2007-03-22 | Siemens Ag | Verfahren und Vorrichtung zum Aufladen eines piezoelektrischen Aktors |
US6420817B1 (en) * | 2000-02-11 | 2002-07-16 | Delphi Technologies, Inc. | Method for detecting injection events in a piezoelectric actuated fuel injector |
-
2002
- 2002-06-17 DE DE10228063A patent/DE10228063A1/de not_active Ceased
-
2003
- 2003-04-23 EP EP03009204A patent/EP1375882B2/de not_active Expired - Lifetime
- 2003-04-23 DE DE50300360T patent/DE50300360D1/de not_active Expired - Lifetime
- 2003-06-17 JP JP2003172402A patent/JP4264303B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2004019666A (ja) | 2004-01-22 |
JP4264303B2 (ja) | 2009-05-13 |
DE50300360D1 (de) | 2005-04-21 |
EP1375882A1 (de) | 2004-01-02 |
EP1375882B2 (de) | 2008-11-19 |
DE10228063A1 (de) | 2004-01-08 |
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