EP1375882A1 - Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs - Google Patents
Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs Download PDFInfo
- Publication number
- EP1375882A1 EP1375882A1 EP03009204A EP03009204A EP1375882A1 EP 1375882 A1 EP1375882 A1 EP 1375882A1 EP 03009204 A EP03009204 A EP 03009204A EP 03009204 A EP03009204 A EP 03009204A EP 1375882 A1 EP1375882 A1 EP 1375882A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- actuator
- nozzle needle
- injection valve
- fuel
- 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.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims description 12
- 239000000446 fuel Substances 0.000 claims abstract description 32
- 238000002347 injection Methods 0.000 claims abstract description 25
- 239000007924 injection Substances 0.000 claims abstract description 25
- 238000004590 computer program Methods 0.000 claims abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims abstract 6
- 230000008569 process Effects 0.000 claims description 2
- 230000001052 transient effect Effects 0.000 claims 1
- 230000008859 change Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 5
- 230000004913 activation Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 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 a motor vehicle, in the fuel from an injector into one Combustion chamber is injected, in which a nozzle needle Injector from a piezoelectric actuator is adjusted, and in which 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 one Internal combustion engine and a corresponding control unit for an internal combustion engine.
- the actuator applied voltage switched off again. However, this leads not causing the voltage on the actuator to go immediately falls off completely. Instead, the actuator remains a residual potential, the size of which is unknown.
- the object of the invention is a method and To create an internal combustion engine, the processing of the Enable residual potential without additional effort.
- This task is initiated in a procedure mentioned type achieved according to the invention in that the Actuator is subjected to a first voltage, which No adjustment of the injector nozzle needle causes, and that the actuator with after a period of time a second voltage is applied, which the Adjustment of the nozzle needle causes.
- the voltage on the actuator is increased by the first voltage set a defined value.
- the one before the next This means that voltage is applied to the actuator known and can be considered. Then this will in that the voltage with which the Actuator to be controlled, additive to the first Tension is added. This results in a change the voltage on the actuator is exactly the value that is provided. Overall, this ensures that by the control with the added, second voltage desired amount of fuel in the combustion chamber Internal combustion engine is injected. An additional one No effort is required for this.
- the first voltage is chosen so small that the The injector nozzle needle is not moving in any case or is adjusted.
- the first tension is on the other hand chosen so large that a residual potential in the Actuator from its last activation if necessary is present is exceeded in any case.
- the invention can 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.
- a device which for an internal combustion engine, in particular of a motor vehicle is provided.
- the internal combustion engine is 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 that is suitable for 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 Injector can be moved back and forth.
- the nozzle needle In one When the nozzle needle is open, the fuel is in injected the combustion chamber in a closed state no fuel is injected. The amount of injected fuel depends on the position of the Nozzle needle in the open state.
- the injection valve has a piezoelectric actuator on, which is provided for adjusting the nozzle needle.
- the purpose of the coupling is between the actuator and the Nozzle needle, for example, a hydraulic coupler intended.
- the actuator can be powered be subjected to a change in the extent of the Actuator. This change in extent will transferred to the nozzle needle so that the nozzle needle in passes their open state.
- the amount of injected Fuel depending on the position of the nozzle needle. This Position in turn depends on the change in Expansion of the actuator. The change in extent is finally depending on the change in that voltage, which is applied to the actuator.
- the amount of injected Fuel is thus a function of changing the fuel Actuator applied voltage.
- a voltage supply is UV provided that at least two voltages are available provides, namely a first voltage U1 and a second Voltage U2.
- a control unit SG controls a switch S. with which one of the two voltages U1, U2 as Actuator voltage UA is switched on.
- the actuator voltage UA is due to the piezoelectric actuator A of described injection valve.
- the power supply UV and the actuator A are exemplified in FIG. 1 Ground switched.
- the actuator voltage is UA plotted against time t. Before a point in time t1 Size of the actuator voltage UA not known. After this At time t1, the actuator voltage UA has 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 that the injector nozzle needle in any case is not moved or adjusted.
- the first voltage U1 therefore only leads to a change in the expansion of the actuator A, which may be a change in the state of the hydraulic coupler. Neither the change the expansion of the actuator A itself, nor the change the state of the hydraulic coupler, however, have one Change the position of the nozzle needle within the Injector result.
- the first voltage U1 can in particular depend on Operating variables of the internal combustion engine are determined for example depending on the fuel acting pressure. The first voltage U1 can thus also change over time.
- the first voltage U1 is selected to be large enough that a residual potential that is in the actuator A from its last control is possibly still present in every case is exceeded. Such a residual potential can result from the fact that the actuator A after a Not fully loaded with tension is discharged.
- the second voltage U2 is selected as follows:
- the amount of injected 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 this determines in a first step which Voltage US is required to get the desired amount of to receive fuel to be injected. In a second Then step this voltage US to the first voltage U1 added. The second voltage U2 results then applied to actuator A.
- position E is Injector nozzle needle over time t applied with the reference symbol O is the open Condition of the nozzle needle or the injection valve and with Z the closed state characterized.
- O is the open Condition of the nozzle needle or the injection valve and with Z the closed state characterized.
- the Nozzle needle before time t2 in its closed Status Especially during the period dt1 from that Time t1 up to time t2 changes Position the nozzle needle not from its closed position Status.
- the time period dt1 is chosen such that Settling processes due to the first voltage U1 the resulting change in the extent of the Actuator A and any resulting Change the state of the hydraulic coupler to any in a manner within the injector, in any case have largely subsided.
- the Actuator A additionally applied voltage US resulting in that the injector nozzle needle in their open state moves, according to the desired amount of fuel to be injected.
- This Movement or adjustment of the nozzle needle takes place due to delayed by inertia of the entire system, namely according to FIG. 2 approximately after a period of time dt2 after Time t2.
- Piezo actuators can be used with voltage regulation, charge regulation or energy control. Independently of certain voltages U1, U2 are necessary in order to be given current and an existing electrical Capacity of the actuator to provide a stroke. The hub will then in further injection pulses to a setpoint regulated. A certain current is impressed and it becomes a certain delta voltage U2-U1 and the knowledge required 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)
Abstract
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, die dazu geeignet sind, ein 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 true EP1375882A1 (de) | 2004-01-02 |
EP1375882B1 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) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1681450A3 (de) * | 2005-01-17 | 2006-11-08 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffeinspritzsystem |
EP2039918A1 (de) * | 2007-09-19 | 2009-03-25 | Hitachi Ltd. | Vorrichtung zur Steuerung der Kraftstoffeinspritzung für einen Verbrennungsmotor |
Families Citing this family (5)
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 |
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 |
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 |
Citations (3)
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 |
WO2001063121A1 (en) * | 2000-02-11 | 2001-08-30 | Delphi Technologies, Inc. | A method for detecting injection events in a piezoelectric actuated fuel injector |
US20020011762A1 (en) * | 1999-01-29 | 2002-01-31 | Rolf Klenk | Device for controlling a piezoelement injection valve |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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 |
-
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
Patent Citations (3)
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 |
US20020011762A1 (en) * | 1999-01-29 | 2002-01-31 | Rolf Klenk | Device for controlling a piezoelement injection valve |
WO2001063121A1 (en) * | 2000-02-11 | 2001-08-30 | Delphi Technologies, Inc. | A method for detecting injection events in a piezoelectric actuated fuel injector |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1681450A3 (de) * | 2005-01-17 | 2006-11-08 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffeinspritzsystem |
EP2039918A1 (de) * | 2007-09-19 | 2009-03-25 | Hitachi Ltd. | Vorrichtung zur Steuerung der Kraftstoffeinspritzung für einen Verbrennungsmotor |
Also Published As
Publication number | Publication date |
---|---|
JP2004019666A (ja) | 2004-01-22 |
JP4264303B2 (ja) | 2009-05-13 |
DE50300360D1 (de) | 2005-04-21 |
EP1375882B1 (de) | 2005-03-16 |
EP1375882B2 (de) | 2008-11-19 |
DE10228063A1 (de) | 2004-01-08 |
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