WO2015078723A1 - Verfahren zum betreiben eines injektors eines einspritzsystems einer brennkraftmaschine - Google Patents
Verfahren zum betreiben eines injektors eines einspritzsystems einer brennkraftmaschine Download PDFInfo
- Publication number
- WO2015078723A1 WO2015078723A1 PCT/EP2014/074852 EP2014074852W WO2015078723A1 WO 2015078723 A1 WO2015078723 A1 WO 2015078723A1 EP 2014074852 W EP2014074852 W EP 2014074852W WO 2015078723 A1 WO2015078723 A1 WO 2015078723A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- needle
- current
- injector
- opening
- point
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000002347 injection Methods 0.000 title claims abstract description 10
- 239000007924 injection Substances 0.000 title claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 8
- 230000003292 diminished effect Effects 0.000 abstract 1
- 230000001133 acceleration Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000000630 rising effect 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
- F02M51/0607—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means the actuator being hollow, e.g. with needle passing through the hollow space
-
- 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
- F02D2041/2037—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit for preventing bouncing of the valve needle
-
- 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
- F02D2041/2048—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit said control involving a limitation, e.g. applying current or voltage limits
-
- 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
Definitions
- the present invention relates to a method for operating an injector with piezo direct drive of an injection system of an internal combustion engine, in which the piezo actuator of the injector for charging the same is driven with a current profile for opening the nozzle needle of the injector.
- piezo direct drive used here is intended to include a drive without servo valve, that is to say a purely mechanical drive, for example via a lever system, or a drive with hydraulic transmission.
- the nozzle needle of the injector is greatly accelerated after opening, so that the mechanical stop of the nozzle needle (in a mechanical drive system) or the hydraulic equilibrium point (in a hyd ⁇ raulischen equilibrium system), the nozzle needle oscillates a few times and causes a characteristic ripple , This reduces the quantity accuracy in this area.
- the present invention has for its object to provide a method of the type described above, with which the aforementioned characteristic waviness of Dü ⁇ sennadel prevented in a particularly accurate manner or at least reduced.
- This object is achieved in a method of the type specified in that before or after the nozzle needle opening and before the mechanical needle stop or the hydraulic Equilibrium point of the needle, the current for charging the piezo actuator is first rapidly reduced so far that the sum force of the forces acting on the nozzle needle forces at a small needle lift (Partlift) to about zero, and then that charging with a small current constant or ramped is controlled until the desired energy is reached.
- Partlift small needle lift
- the forces acting on the nozzle needle are, in particular, the forces of the piezoactuator, a spring of the nozzle needle and hydraulic forces. At this point, therefore, there is no further acceleration, there is a constant speed.
- the here addressed injection system of an internal combustion engine has a high-pressure accumulator (rail), from which the injector is supplied with fuel under high pressure.
- the present invention is based on the idea of modifying the current profile for the charging of the piezoactuator in such a way that the aforementioned characteristic ripple is prevented.
- the procedure ensures that the nozzle needle is opened very quickly at the beginning to achieve rapid de-throttling. This ensures that at a higher needle lift, for example, from 50 microns, the needle speed is lower and is reduced to a minimum before the attachment point or equilibrium point, which reduces or eliminates the corresponding needle surplus at the stop / equilibrium ⁇ point.
- the adverse characteristic ripple or S-shape is largely eliminated.
- the piezoactuator is first charged with a current of I_high and then rapidly reduced.
- the current is set to a low value I_low after a delay time relative to the time needle opening until the needle has reached a specific needle lift (Partlift), in which the sum of the forces acting on the needle at this point corresponds to about zero .
- Partlift needle lift
- This particular needle lift (Partlift) is for example, about 50 microns, as mentioned.
- the value for this lift is chosen so that on the one hand the needle seat is largely de-throttled, on the other side of the needle lift to the end position still has a sufficient distance for a needle lift control by electricity.
- the current is set to a different value again.
- the current after reaching the particular needle lift (Partliftes) is set so that the needle lift ramps up with a defined slope to the final position without this at the anchor point / equilibrium point here cause a ripple characteristic (the kinetic energy of the needle is doing to large Part reduced).
- the control of the needle lift after seat throttling to the end position with a slow ramp causes a slow increase in the injection rate, which also benefits the combustion.
- the current can also be controlled so that it remains constant until the
- Both the setpoint value for the needle opening time and the current setting I_high are preferably realized as a function of the rail pressure.
- the delay time is negative, the current is already reduced before the needle opening (from I_high to I_low).
- the current is kept constant around the needle opening time. In this way, the Nadelötechnischs ⁇ time can be accurately determined.
- the needle opening time is (additionally) detected from the piezo voltage signal.
- the piezoactuator relieves pressure and causes a small voltage dip, which is superimposed on the rising voltage caused by the current. In this way, the needle opening time can be determined.
- the detected needle opening timing is preferably used to control I_high to realize the same needle opening timing setpoint depending on the rail pressure and thereby increase the quantity accuracy.
- the current I_high is increased accordingly to bring the opening timing back to the target value. If the opening time goes early, then I_high is reduced.
- the current I_low and I_ramp can also be adjusted depending on the corrected current I_high.
- the current I_low remains 0 until the estimated needle lift reaches the setpoint value L_soll_l of, for example, 50 at the time t_entdr (see FIG.
- Micromenter has reached. Thereafter, the current is set to I_ramp until the Soll_Ladeenergie for the realization of end-Nadellift is achieved.
- This charging strategy is simple and robust. At the same time, the accuracy of the needle opening determination via voltage is increased, since the charging current-dependent voltage change around the needle opening point is omitted.
- Yet another preferred embodiment of the method according ⁇ proper is as follows. In the case that after performing the method, there is still a mechanical needle stop or a needle vibration around the hydraulic equilibrium point, the magnitude of the impact or vibration is detected via the piezo voltage and the current I_ramp and the final energy are thus further reduced , until the Needle excess at the stop or at the equilibrium point is barely detectable.
- FIG. 1 is a diagram in which the course of the charging current I, the
- Figure 2 is a corresponding representation as Figure 1 in a second embodiment of the method.
- the corresponding embodiments relate to methods for operating an injector with piezo direct drive of a high-pressure accumulator (rail) having injection system of an internal combustion engine, wherein the piezo actuator of the injector for charging the same is driven with a current profile for opening the nozzle needle of the injector.
- the current profile is used for driving the piezo actuator is in this case so modi fied ⁇ that a nozzle needle surplus at the stop point / DC ⁇ equilibrium point, which leads to a Kennlinienwellmaschine, re- cuted.
- stop point / point of equilibrium is the attachment point of the nozzle needle in a mechanical on ⁇ operating system or the balance point of the needle in a hydraulic drive system meant.
- the piezo actuator is first charged with a high current I_high.
- the current is adjusted to a low value I_low until the needle has reached about a 50 micron partlift at t_entdr and the sum force on the needle at this point is about zero (no more Acceleration, constant speed).
- I_ramp is chosen so that the needle lift is in the shape of a ram with a defined incline up to the final position rises without causing characteristic waviness at the anchor point / balance point.
- the delay time D_t is positive relative to the needle opening time.
- the reduction of the current from I_high to I_low therefore takes place after the needle opening t_ö.
- the delay time D_t is negative with respect to the needle opening time.
- a reduction of the current from I_high to I_low takes place even before the needle opening t_ö.
- the needle current is reduced from I_high to I_low to a value of zero.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020167013311A KR101832638B1 (ko) | 2013-11-28 | 2014-11-18 | 내연 엔진의 분사 시스템의 인젝터를 동작시키는 방법 |
US15/100,397 US9976505B2 (en) | 2013-11-28 | 2014-11-18 | Method for operating an injector of an injection system of an internal combustion engine |
CN201480065138.8A CN105745425A (zh) | 2013-11-28 | 2014-11-18 | 用于操作内燃发动机的喷射系统的喷射器的方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013224385.5 | 2013-11-28 | ||
DE201310224385 DE102013224385B3 (de) | 2013-11-28 | 2013-11-28 | Verfahren zum Betreiben eines Injektors eines Einspritzsystems einer Brennkraftmaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015078723A1 true WO2015078723A1 (de) | 2015-06-04 |
Family
ID=51900889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2014/074852 WO2015078723A1 (de) | 2013-11-28 | 2014-11-18 | Verfahren zum betreiben eines injektors eines einspritzsystems einer brennkraftmaschine |
Country Status (5)
Country | Link |
---|---|
US (1) | US9976505B2 (de) |
KR (1) | KR101832638B1 (de) |
CN (1) | CN105745425A (de) |
DE (1) | DE102013224385B3 (de) |
WO (1) | WO2015078723A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9976505B2 (en) | 2013-11-28 | 2018-05-22 | Continental Automotive Gmbh | Method for operating an injector of an injection system of an internal combustion engine |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6610571B2 (ja) * | 2017-01-20 | 2019-11-27 | トヨタ自動車株式会社 | 内燃機関の燃料噴射制御装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19921456A1 (de) * | 1999-05-08 | 2000-11-16 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Ansteuerung eines piezoelektrischen Aktors |
DE60207239T2 (de) * | 2001-05-23 | 2006-08-10 | Westport Research Inc., Vancouver | Direkt betätigtes einspritzventil |
EP1860307A1 (de) * | 2006-05-23 | 2007-11-28 | Delphi Technologies, Inc. | Verfahren zur Steuerung eines piezoelektrischen Aktuators |
DE102008040412A1 (de) * | 2008-03-18 | 2009-09-24 | Robert Bosch Gmbh | Verfahren zur Prellunterdrückung eines durch einen Piezoaktor geschalteten Ventils |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6298829B1 (en) * | 1999-10-15 | 2001-10-09 | Westport Research Inc. | Directly actuated injection valve |
EP1488089B1 (de) * | 2002-03-28 | 2005-12-21 | Volkswagen Mechatronic GmbH & Co. KG | Verfahren und vorrichtung zur ansteuerung des piezo-aktuators eines piezo-steuerventils einer pumpe-düse-einheit |
DE102004062073B4 (de) * | 2004-12-23 | 2015-08-13 | Continental Automotive Gmbh | Verfahren und Vorrichtung zur Kompensation von Prelleffekten in einem piezogesteuerten Einspritzsystem einer Verbrennungskraftmaschine |
US7856964B2 (en) | 2006-05-23 | 2010-12-28 | Delphi Technologies Holding S.Arl | Method of controlling a piezoelectric actuator |
JP4623066B2 (ja) | 2007-08-31 | 2011-02-02 | 株式会社デンソー | 内燃機関の噴射制御装置 |
FR2990998B1 (fr) * | 2012-05-23 | 2016-02-26 | Continental Automotive France | Procede de pilotage d'au moins un actionneur piezoelectrique d'injecteur de carburant d'un moteur a combustion interne |
EP3069002A1 (de) * | 2013-11-15 | 2016-09-21 | Sentec Ltd | Steuereinheit für einen kraftstoffinjektor |
DE102013224385B3 (de) | 2013-11-28 | 2015-03-12 | Continental Automotive Gmbh | Verfahren zum Betreiben eines Injektors eines Einspritzsystems einer Brennkraftmaschine |
-
2013
- 2013-11-28 DE DE201310224385 patent/DE102013224385B3/de not_active Expired - Fee Related
-
2014
- 2014-11-18 CN CN201480065138.8A patent/CN105745425A/zh active Pending
- 2014-11-18 US US15/100,397 patent/US9976505B2/en not_active Expired - Fee Related
- 2014-11-18 KR KR1020167013311A patent/KR101832638B1/ko active IP Right Grant
- 2014-11-18 WO PCT/EP2014/074852 patent/WO2015078723A1/de active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19921456A1 (de) * | 1999-05-08 | 2000-11-16 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Ansteuerung eines piezoelektrischen Aktors |
DE60207239T2 (de) * | 2001-05-23 | 2006-08-10 | Westport Research Inc., Vancouver | Direkt betätigtes einspritzventil |
EP1860307A1 (de) * | 2006-05-23 | 2007-11-28 | Delphi Technologies, Inc. | Verfahren zur Steuerung eines piezoelektrischen Aktuators |
DE102008040412A1 (de) * | 2008-03-18 | 2009-09-24 | Robert Bosch Gmbh | Verfahren zur Prellunterdrückung eines durch einen Piezoaktor geschalteten Ventils |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9976505B2 (en) | 2013-11-28 | 2018-05-22 | Continental Automotive Gmbh | Method for operating an injector of an injection system of an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
KR101832638B1 (ko) | 2018-04-04 |
KR20160070151A (ko) | 2016-06-17 |
CN105745425A (zh) | 2016-07-06 |
US9976505B2 (en) | 2018-05-22 |
DE102013224385B3 (de) | 2015-03-12 |
US20160298564A1 (en) | 2016-10-13 |
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