WO2009074375A1 - Verfahren und steuereinheit zur elektrischen ansteuerung eines aktors eines einspritzventils - Google Patents
Verfahren und steuereinheit zur elektrischen ansteuerung eines aktors eines einspritzventils Download PDFInfo
- Publication number
- WO2009074375A1 WO2009074375A1 PCT/EP2008/063808 EP2008063808W WO2009074375A1 WO 2009074375 A1 WO2009074375 A1 WO 2009074375A1 EP 2008063808 W EP2008063808 W EP 2008063808W WO 2009074375 A1 WO2009074375 A1 WO 2009074375A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- control
- characteristic
- pilot
- jump
- intercept
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000002347 injection Methods 0.000 title claims abstract description 22
- 239000007924 injection Substances 0.000 title claims abstract description 22
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 claims description 12
- 230000007613 environmental effect Effects 0.000 claims description 4
- 230000032683 aging Effects 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 claims 1
- NQLVQOSNDJXLKG-UHFFFAOYSA-N prosulfocarb Chemical compound CCCN(CCC)C(=O)SCC1=CC=CC=C1 NQLVQOSNDJXLKG-UHFFFAOYSA-N 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D41/1402—Adaptive control
Definitions
- the invention relates to a method for the electrical control of an actuator of an injection valve in an injection system for an internal combustion engine.
- the invention relates to a corresponding control unit.
- piezo actuators are used for the mechanical actuation of the injection valves, which are electrically controlled and cause a corresponding displacement of a nozzle needle in the respective injection valve, depending on the stored electrical energy in them, the stroke of the nozzle needle a function is the electrical energy stored in the piezoelectric actuator.
- the electrical control of the piezoelectric actuators is usually carried out by a pilot control with a higher-level control.
- the desired electrical energy of the piezoelectric actuator and thus the desired stroke of the nozzle needle is specified as the desired value.
- the precontrol determines according to a predetermined pilot characteristic a corresponding control variable, such as the duty cycle for a pulse width modulated control of a power amplifier. From DE 10 2005 010 028 Al, it is also known to adapt the pilot control characteristic in the context of the superimposed control by setting the characteristic gradient as part of the control.
- a disadvantage of the regulation according to DE 10 2005 010 028 A1 is the fact that the modeled pilot control characteristic does not exactly match the real behavior of the system. In the case of a set value jump, this leads to a control deviation initially occurring. Although this control deviation is compensated by the control by the characteristic slope of the pilot control curve is adapted accordingly. During the settling time of the control, however, a dynamic control deviation occurs, which is undesirable.
- the invention is therefore based on the object to improve the known readjustment of the pilot characteristic accordingly.
- the invention comprises the general technical teaching, in the readjustment of the pilot characteristic not only to adjust the slope, but the intercept of the pilot characteristic to adapt the pilot characteristic as closely as possible to the actual system behavior.
- the readjustment of the pilot control characteristic preferably takes place in the case of a desired value jump, wherein the dynamic control deviation which occurs immediately after the desired value jump before the regulation is determined.
- the pilot control characteristic is then set as a function of the dynamic control deviation. This idea is based on the knowledge that the dynamic control deviation in the case of a set value jump is caused by the fact that the pre-control characteristic does not correctly reflect the actual system behavior.
- Target value of the controlled variable for example actuator energy
- Set-point jump Setpoint value of the controlled variable after the setpoint value jump, actual value of the controlled variable immediately after the setpoint value jump before the compensation of the control deviation, control or manipulated variable (eg duty cycle of the pulse width modulated control of the output stage) before set-point jump,
- the calculation of the adapted intercept is preferably carried out according to the following formula:
- E2 S0 L L Setpoint value of the controlled variable after the setpoint value jump
- E2 I ST Actual value of the controlled variable immediately after the setpoint value jump before the regulation of the control deviation
- ⁇ E Deviation of the controlled variable UNMIT ⁇ telbar, after the set-point jump in front of load compensation of the deviation
- PWMl control or manipulated variable before the setpoint value jump and / or PWM2 control or manipulated variable immediately after the setpoint value jump before the control deviation is compensated.
- the intercept of the Pre-control curve is set, but also the slope of the pilot characteristic.
- control variable or manipulated variable before the desired value jump intercept of the pilot characteristic before the desired value jump
- adapted intercept of the pilot characteristic after the desired value jump
- PWML control or manipulated variable before the set-point jump offs
- Real Adapted intercept the pilot characteristic after the readjustment
- EI SHALL target value of the controlled variable (E) before the target value jump.
- the actuation of the actuator preferably takes place pulse-width-modulated by an output stage with a variable duty cycle, wherein the control variable controlled and readjusted in the context of the invention is the pulse duty factor of the output stage.
- the invention is not limited to a pulse-width-modulated control with regard to the electrical control of the actuator, but in principle can also be implemented with other control methods.
- the actuator is preferably a piezoactuator.
- the invention is not limited to piezoactuators with regard to the actuator type, but in principle can also be implemented with other types of actuators.
- the controlled variable of the actuator is preferably the electrical energy stored in the actuator, which determines the stroke of the nozzle needle of the injection valve in the case of piezo actuators.
- the invention is not limited in terms of the controlled variable to the stored energy in the actuator.
- other control variables can determine the stroke of the nozzle needle.
- the readjustment of the pilot characteristic is not permanent, but only when needed, i. if the pilot control characteristic no longer reflects the actual system behavior with sufficient accuracy.
- the readjustment of the pilot control characteristic therefore takes place during operation of the injection system, preferably only temporarily and / or only occasionally.
- the control requirement can be recognized from the fact that the dynamic system deviation occurring in the case of a desired value jump exceeds a predetermined maximum value in terms of amount.
- the readjustment of the intercept of the pilot control characteristic therefore preferably takes place only if the dynamic control deviation occurring in the case of a desired value jump exceeds the predefined maximum value.
- the environmental conditions of the injection system are checked for a change, with the readjustment of the pilot characteristic only takes place when the environmental conditions have changed to a certain extent.
- the temperature in particular the ambient temperature, the coolant temperature or the oil temperature, are checked.
- the aging state of the internal combustion engine, the injection system and / or the actuator can be checked in order to perform a readjustment of the pilot control characteristic at certain intervals.
- the electrical capacitance of the actuator can be monitored, so that a readjustment of the pilot control characteristic can be carried out in the event of a change in capacity.
- the invention also includes a corresponding control unit which carries out the method according to the invention.
- the invention also includes a motor vehicle with such a control unit, which carries out the method according to the invention.
- FIG. 1 shows a simplified representation of a control unit according to the invention for controlling a piezoelectric actuator
- FIG. 2 shows a modeled and a real pilot control characteristic curve for determining the pulse duty factor of the pulse-width-modulated actuator control as a function of the desired actuator energy, as well as FIG. 2
- Flowchart. 1 shows a simplified, schematic representation of a control unit 1 according to the invention for controlling a piezoelectric actuator 2, wherein the piezoelectric actuator 2 operates in a conventional manner an injection valve 3 for an internal combustion engine of a motor vehicle.
- control unit 1 receives on the input side from an electronic engine control unit (ECU: Electronic Control Unit) target values E SOLL for the actuator energy stored in the piezoactuator 2, since the actuator energy E determines the stroke of the nozzle needle of the injection valve 3 and thus a fuel volume flow Q.
- ECU Electronic Control Unit
- the electrical control of the piezoelectric actuator 2 is carried out in a conventional manner pulse width modulated by an output stage 4 with a variable duty cycle PWM.
- the duty cycle PWM is determined by a precontrol 5 in accordance with a precontrol characteristic as a function of the desired setpoint value E SOLL .
- the actual value of Ei ST is therefore supplied to a subtracter 7, which, from a predetermined target value E SOLL and the measured actual value of the actuator energy E E is calculated, a deviation .DELTA.E loading, which is supplied to a controller. 8
- the controller 8 can then readjust the pilot characteristic used by the feedforward control 5, if necessary.
- a readjustment of the pilot control characteristic is required, for example, if the modeled and from the
- the controller 8 sets both an intercept OffsCal and a characteristic slope K CAL , as will be described in detail.
- the readjustment of the pilot control characteristic does not take place permanently in the control unit 1, but only on demand-controlled, if the modeled pilot control characteristic no longer reproduces the actual system behavior with sufficient accuracy. This can be recognized by the fact that the dynamic control deviation ⁇ E exceeds a predefined maximum value ⁇ E MAX in the case of a desired value jump.
- the diagram shows a modeled pilot characteristic curve 9, which is defined by an intercept section OffsCal and a characteristic gradient K CAL .
- the diagram shows a real pilot characteristic curve 10, which is defined by an intercept section OffsReal and a characteristic gradient K RE AL and which represents the actual dependency of the pulse duty factor PWM on the resulting actuator energy E.
- the deviation between the modeled pilot control characteristic 9 and the real pilot control characteristic 10 results in a desired value jump from a first target value E1 SOLL TO a second target value E2 SOLL TO a dynamic control deviation ⁇ E.
- a first desired value El 30 LL for the actuator energy E of the piezoelectric actuator 2 is then specified.
- a duty cycle PWM1 is then determined in accordance with the modeled pilot control line 9 from the predefined setpoint value E1 SOLL .
- the output stage 4 for the piezoelectric actuator 2 is then driven in a step S4 with this duty cycle PWM 1.
- a corresponding duty cycle PWM2 is then determined according to the modeled pilot control characteristic 9 as a function of the new desired value E2 SOLL .
- the output stage 4 is then driven with the new duty cycle PWM2 in a step S7.
- the measuring element 6 measures the actual value E2 ⁇ s ⁇ of the actuator energy immediately after the setpoint value jump before the control deviation is compensated.
- the subtracter 7 then calculates the control deviation in a step S9
- the controller 8 checks whether the dynamic control deviation ⁇ E exceeds a predetermined maximum value ⁇ E MAX . This is the case when the mo- The pre-control characteristic curve 9 does not correspond with the actual pre-control characteristic curve 10 with sufficient accuracy.
- a step S12 the deviation ⁇ Offs between the axis section OffsReal of the real pilot characteristic curve 10 is first calculated by the intercept section OffsCal of the modeled pilot characteristic curve 9, the error ⁇ Offs resulting from the use of the beam set from the following formula:
- PWM2 Duty cycle of the output stage after the setpoint value jump.
- the new intercept section OffsReal of the adapted pilot control characteristic is then calculated according to the following formula:
- OffsReal OffsCal + ⁇ Offs.
- step S14 the characteristic gradient of the pilot control characteristic is then adapted according to the following formula
- OffsCal Axis section of the non-adapted pilot characteristic 9 ⁇ Offs: Deviation between the axis section OffsReal and the axis section OffsCal
- a step S15 the characteristic parameters of the pilot control characteristic are then updated.
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 (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/747,921 US8521401B2 (en) | 2007-12-13 | 2008-10-14 | Method and control unit for electric control of an actuator of an injection valve |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007060018A DE102007060018B3 (de) | 2007-12-13 | 2007-12-13 | Verfahren und Steuereinheit zur elektrischen Ansteuerung eines Aktors eines Einspritzventils |
DE102007060018.8 | 2007-12-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009074375A1 true WO2009074375A1 (de) | 2009-06-18 |
Family
ID=40280836
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/063808 WO2009074375A1 (de) | 2007-12-13 | 2008-10-14 | Verfahren und steuereinheit zur elektrischen ansteuerung eines aktors eines einspritzventils |
Country Status (4)
Country | Link |
---|---|
US (1) | US8521401B2 (de) |
KR (1) | KR101476990B1 (de) |
DE (1) | DE102007060018B3 (de) |
WO (1) | WO2009074375A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006057524B4 (de) * | 2006-12-06 | 2016-05-19 | Continental Automotive Gmbh | Verfahren zur Adaption eines Widerstandsbeiwertes eines Mengenstellventils |
DE102013220613B4 (de) * | 2013-10-11 | 2024-03-14 | Vitesco Technologies GmbH | Verfahren und Computerprogramm zum Ansteuern eines Kraftstoffinjektors |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19930309A1 (de) * | 1999-07-01 | 2001-01-11 | Siemens Ag | Verfahren und Vorrichtung zur Regelung der Einspritzmenge bei einem Kraftstoffeinspritzventil mit Piezoelement-Aktor |
EP1138909A1 (de) * | 2000-04-01 | 2001-10-04 | Robert Bosch GmbH | Verfahren und Vorrichtung zur Steuerung eines Brennstoffeinspritzverfahrens |
DE10311540A1 (de) * | 2002-03-28 | 2004-01-08 | Siemens Vdo Automotive Corp., Auburn Hills | Kraftstoffeinspritzungs-Timer und Stromregler |
DE10340975A1 (de) * | 2003-09-05 | 2005-03-31 | Robert Bosch Gmbh | Verfahren für die Steuerung eines Stellglieds |
WO2005066478A1 (de) * | 2004-01-12 | 2005-07-21 | Siemens Aktiengesellschaft | Regelungsverfahren und regelungseinrichtung für einen aktor |
DE102005010028A1 (de) * | 2005-03-04 | 2006-09-14 | Siemens Ag | Reglervorrichtung zur Kompensation von Streuungen von Injektoren |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3926031C1 (en) * | 1989-08-07 | 1990-11-29 | Robert Bosch Gmbh, 7000 Stuttgart, De | Adapting characteristic working of adjuster - limiting signal affecting base point of characteristic curve to predetermined min. value |
DE10311011B4 (de) * | 2003-03-13 | 2016-10-20 | Robert Bosch Gmbh | Verfahren zum Erfassen eines individuellen Offsetwertes einer elektrischen Größe zum Ansteuern eines Einspritzventils einer Brennkraftmaschine |
DE102006057524B4 (de) * | 2006-12-06 | 2016-05-19 | Continental Automotive Gmbh | Verfahren zur Adaption eines Widerstandsbeiwertes eines Mengenstellventils |
DE102006057523B4 (de) * | 2006-12-06 | 2008-08-07 | Siemens Ag | Regelverfahren für eine Volumenstromregelung |
JP5287912B2 (ja) * | 2011-03-15 | 2013-09-11 | 株式会社デンソー | エンジン制御装置 |
-
2007
- 2007-12-13 DE DE102007060018A patent/DE102007060018B3/de active Active
-
2008
- 2008-10-14 WO PCT/EP2008/063808 patent/WO2009074375A1/de active Application Filing
- 2008-10-14 KR KR1020107015383A patent/KR101476990B1/ko active IP Right Grant
- 2008-10-14 US US12/747,921 patent/US8521401B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19930309A1 (de) * | 1999-07-01 | 2001-01-11 | Siemens Ag | Verfahren und Vorrichtung zur Regelung der Einspritzmenge bei einem Kraftstoffeinspritzventil mit Piezoelement-Aktor |
EP1138909A1 (de) * | 2000-04-01 | 2001-10-04 | Robert Bosch GmbH | Verfahren und Vorrichtung zur Steuerung eines Brennstoffeinspritzverfahrens |
DE10311540A1 (de) * | 2002-03-28 | 2004-01-08 | Siemens Vdo Automotive Corp., Auburn Hills | Kraftstoffeinspritzungs-Timer und Stromregler |
DE10340975A1 (de) * | 2003-09-05 | 2005-03-31 | Robert Bosch Gmbh | Verfahren für die Steuerung eines Stellglieds |
WO2005066478A1 (de) * | 2004-01-12 | 2005-07-21 | Siemens Aktiengesellschaft | Regelungsverfahren und regelungseinrichtung für einen aktor |
DE102005010028A1 (de) * | 2005-03-04 | 2006-09-14 | Siemens Ag | Reglervorrichtung zur Kompensation von Streuungen von Injektoren |
Also Published As
Publication number | Publication date |
---|---|
US20100307456A1 (en) | 2010-12-09 |
KR101476990B1 (ko) | 2014-12-29 |
KR20100102655A (ko) | 2010-09-24 |
DE102007060018B3 (de) | 2009-06-18 |
US8521401B2 (en) | 2013-08-27 |
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