WO2004018859A1 - Verfahren zum betrieb einer brennkraftmaschine - Google Patents
Verfahren zum betrieb einer brennkraftmaschine Download PDFInfo
- Publication number
- WO2004018859A1 WO2004018859A1 PCT/DE2003/002212 DE0302212W WO2004018859A1 WO 2004018859 A1 WO2004018859 A1 WO 2004018859A1 DE 0302212 W DE0302212 W DE 0302212W WO 2004018859 A1 WO2004018859 A1 WO 2004018859A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve needle
- control signal
- valve
- intermediate position
- closed position
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 13
- 238000002347 injection Methods 0.000 claims abstract description 22
- 239000007924 injection Substances 0.000 claims abstract description 22
- 230000007704 transition Effects 0.000 claims abstract description 18
- 238000004590 computer program Methods 0.000 claims description 8
- 238000011109 contamination Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000011017 operating method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000036316 preload 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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
Definitions
- the present invention relates to a method for operating an internal combustion engine, in which a valve needle of an injection valve is adjusted from a closed position via an intermediate position to an open position and back again by means of a piezoelectric actuator actuated by a control signal.
- the present invention relates to a control device for an internal combustion engine in which a valve needle of an injection valve can be adjusted from a closed position via an intermediate position to an open position and back again by means of a piezoelectric actuator actuated by a control signal.
- the increased risk of contamination is due to the fact that the injection valve is in a state with a comparatively short stroke of the injection needle and thus a small opening of the injection valve over a relatively long period of time. In this state, the risk of particles becoming trapped between the valve opening and the valve needle and clogging the valve opening is particularly great.
- a higher edge steepness of the control signal leads to a higher speed of the valve needle during the transition from the open to the closed position and vice versa, but when the valve needle hits the valve seat, the high speed of the valve needle results in so-called needle bumpers, which lead to the injection valve becoming stuck opens uncontrolled after reaching the closed position. Overshoot of the valve needle can also occur.
- control signal has a greater slope when the valve needle changes from the closed position to the intermediate position than when the valve needle changes from the intermediate position to the open position.
- the comparatively large slope of the Control signal for the piezoelectric actuator during the transition of the valve needle from the closed position to the intermediate position causes a rapid adjustment of the valve needle from the closing position to the intermediate position, so that the period in which the has a low needle, is short, so that the likelihood of valve contamination or clogging due to the trapping of particles is reduced.
- the comparatively low edge steepness of the control signal for the piezoelectric actuator during the transition of the valve needle from the intermediate position to the open position leads to a controlled reaching of the open position by the valve needle, in which the valve needle in particular does not bounce, so that there is no uncontrolled adjustment of the valve needle in the open position
- control signal has a greater slope on the transition of the valve needle from the open position to the intermediate position than on the transition of the valve needle from the intermediate position to the closed position, which, like the opening process of the injection valve, has the same advantages with regard to the duration of the opening time of the injection valve with a small needle stroke or the controlled reaching of the closed position by the valve needle.
- valve needle bounces due to the comparatively low slope. the control signal at the transition of the valve needle from the intermediate position into the closed position not from the valve seat, so that no uncontrolled opening of the injection valve after reaching the closed position through the valve needle.
- Another advantageous embodiment of the present invention is characterized in that the control signal at the transition ⁇ er Ve r _ ⁇ lraocI.
- the opening position to the closing position is symmetrical to the control signal when the valve needle changes from the closing position to the opening position.
- the symmetry results in a considerable simplification in the control of the piezoelectric actuator, because the signal form of the control signal only has to be stored for a transition of the valve needle, i.e. either for the transition of the valve needle from the closed position to the open position or vice versa.
- the respective other control signal can, for example, by subtracting the stored signal values of the
- Control signal of a maximum signal value for the control signal or the like be formed. This is possible both with an analog and with a digital control of the piezoelectric actuator.
- a computer program for a control device of an internal combustion engine in which a valve needle of an injection valve is adjusted from a closed position via an intermediate position to an open position and back again by means of a piezoelectric actuator acted upon by a control signal, wherein the computer program from the r uhru g of the inventive method is suitable.
- FIG. 1 shows the time course of a control signal according to the invention
- FIG. 2 shows the course over time of a further control signal according to the invention.
- the control signal SA shown in FIG. 1 is used in an internal combustion engine (not shown) to control a piezoelectric actuator which adjusts a valve needle of an injection valve of the internal combustion engine from a closed position via an intermediate position to an open position and back again.
- t denotes the time axis and A denotes a value of the control signal SA standardized to the maximum value of the control signal SA.
- the control signal SA is an analog signal.
- the piezoelectric actuator (not shown) is actuated by a control device of the internal combustion engine, likewise not shown, with the part of the actuation signal SA which is in the region SZ and in which the actuation signal SA has a comparatively large slope. This ensures that the valve needle of the
- the piezoelectric actuator is driven during the transition from the intermediate position to the opening position, which corresponds to a value one of the drive signal SA, with a drive signal SA having a comparatively low slope, which defines the area ZO of the drive signal SA.
- the low edge steepness of the control signal SA in the area ⁇ J means that the valve needle is not too fast when it reaches the opening position and moves out of the opening position reached in an uncontrolled manner by bouncing or opens in an uncontrolled manner due to overshoot.
- the drive signal SA is kept at its maximum value of one for a certain time.
- control signal SA first passes through the area OZ during the closing process, the valve needle of the injection valve being moved from the open position to the intermediate position.
- the slope of the control signal S ⁇ is again relatively large to avoid the already mentioned risk of Reduce valve wear.
- FIG. 2 shows a corresponding diagram in which the time profile of the digital control signal SD is specified.
- the mode of operation is identical to the control of the piezoelectric actuator with the analog control signal SA
- Opening position the closing position is determined approximately only by the kinematics of a system consisting of the valve needle and a spring that mechanically applies a preload to the valve needle, it is advantageous to determine the mechanical parameters of the valve needle / spring system when selecting the signal form of the control signal SA or SD to be considered in order to achieve an optimal distribution of the valve eg with large / small slope.
- Control unit and to form the respective other waveform from the stored waveform.
- the method described above is implemented as a computer program that can run on the control device and is stored in its memory.
- the method according to the invention can be used in metering systems with components driven by piezoelectric actuators.
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)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03792117A EP1530676B9 (de) | 2002-08-16 | 2003-07-02 | Verfahren zum betrieb einer brennkraftmaschine |
JP2004529700A JP2005535832A (ja) | 2002-08-16 | 2003-07-02 | 内燃機関を作動させる方法 |
DE50311455T DE50311455D1 (de) | 2002-08-16 | 2003-07-02 | Verfahren zum betrieb einer brennkraftmaschine |
US10/524,602 US7373927B2 (en) | 2002-08-16 | 2003-07-02 | Method for operating an internal combustion engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10237408.2 | 2002-08-16 | ||
DE10237408A DE10237408A1 (de) | 2002-08-16 | 2002-08-16 | Verfahren zum Betrieb einer Brennkraftmaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004018859A1 true WO2004018859A1 (de) | 2004-03-04 |
Family
ID=30469750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2003/002212 WO2004018859A1 (de) | 2002-08-16 | 2003-07-02 | Verfahren zum betrieb einer brennkraftmaschine |
Country Status (6)
Country | Link |
---|---|
US (1) | US7373927B2 (de) |
EP (1) | EP1530676B9 (de) |
JP (1) | JP2005535832A (de) |
DE (2) | DE10237408A1 (de) |
ES (1) | ES2322580T3 (de) |
WO (1) | WO2004018859A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0616713D0 (en) * | 2006-08-23 | 2006-10-04 | Delphi Tech Inc | Piezoelectric fuel injectors |
CA2600323C (en) * | 2007-09-20 | 2009-12-29 | Westport Power Inc. | Directly actuated valve with a strain-type actuator and a method of operating same |
US7721716B1 (en) | 2008-07-16 | 2010-05-25 | Harwood Michael R | High pressure piezoelectric fuel injector |
JP2012041897A (ja) * | 2010-08-20 | 2012-03-01 | Toyota Motor Corp | スターリングエンジンの制御装置 |
US9284930B2 (en) | 2011-06-03 | 2016-03-15 | Michael R. Harwood | High pressure piezoelectric fuel injector |
JP2013104326A (ja) * | 2011-11-11 | 2013-05-30 | Toyota Motor Corp | 内燃機関の燃料噴射システム |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3935937A1 (de) * | 1988-10-27 | 1990-05-03 | Toyota Motor Co Ltd | Vorrichtung zum ansteuern piezoelektrischer einspritzeinrichtungen zum durchfuehren einer haupt- und voreinspritzung in einem dieselmotor |
DE10039418A1 (de) * | 2000-08-11 | 2002-02-28 | Siemens Ag | Verfahren zum Steuren einer Düsennadel einer Dosiervorrichtung |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3803424A (en) * | 1972-05-08 | 1974-04-09 | Physics Int Co | Piezoelectric pump system |
US4726389A (en) * | 1986-12-11 | 1988-02-23 | Aisan Kogyo Kabushiki Kaisha | Method of controlling injector valve |
US5025766A (en) * | 1987-08-24 | 1991-06-25 | Hitachi, Ltd. | Fuel injection valve and fuel supply system equipped therewith for internal combustion engines |
US6253736B1 (en) * | 1999-08-10 | 2001-07-03 | Cummins Engine Company, Inc. | Fuel injector nozzle assembly with feedback control |
US6420817B1 (en) * | 2000-02-11 | 2002-07-16 | Delphi Technologies, Inc. | Method for detecting injection events in a piezoelectric actuated fuel injector |
EP1138915B1 (de) * | 2000-04-01 | 2005-10-26 | Robert Bosch GmbH | Verfahren und Vorrichtung zur Bestimmung der Ladungsquantität während des Auf- und Entladens von piezoelektrischen Elementen |
US6990855B2 (en) * | 2000-05-04 | 2006-01-31 | Cummins, Inc. | System for estimating a quantity of parasitic leakage from a fuel injection system |
DE10035815A1 (de) * | 2000-07-22 | 2002-01-31 | Bosch Gmbh Robert | Verfahren zur Steuerung eines Einspritzventils |
FR2819022B1 (fr) * | 2000-12-28 | 2006-06-02 | Denso Corp | Dispositif de commande hydraulique, systeme et procede de commande d'un dispositif actionneur |
GB0104215D0 (en) * | 2001-02-21 | 2001-04-11 | Delphi Tech Inc | Control method |
DE10113670A1 (de) * | 2001-03-21 | 2002-09-26 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Ansteuerung eines Piezoaktors |
US6760212B2 (en) * | 2002-09-23 | 2004-07-06 | Delphi Technologies, Inc. | Piezoelectric injector drive circuit |
-
2002
- 2002-08-16 DE DE10237408A patent/DE10237408A1/de not_active Ceased
-
2003
- 2003-07-02 EP EP03792117A patent/EP1530676B9/de not_active Expired - Lifetime
- 2003-07-02 ES ES03792117T patent/ES2322580T3/es not_active Expired - Lifetime
- 2003-07-02 US US10/524,602 patent/US7373927B2/en not_active Expired - Fee Related
- 2003-07-02 DE DE50311455T patent/DE50311455D1/de not_active Expired - Lifetime
- 2003-07-02 JP JP2004529700A patent/JP2005535832A/ja active Pending
- 2003-07-02 WO PCT/DE2003/002212 patent/WO2004018859A1/de active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3935937A1 (de) * | 1988-10-27 | 1990-05-03 | Toyota Motor Co Ltd | Vorrichtung zum ansteuern piezoelektrischer einspritzeinrichtungen zum durchfuehren einer haupt- und voreinspritzung in einem dieselmotor |
DE10039418A1 (de) * | 2000-08-11 | 2002-02-28 | Siemens Ag | Verfahren zum Steuren einer Düsennadel einer Dosiervorrichtung |
Also Published As
Publication number | Publication date |
---|---|
JP2005535832A (ja) | 2005-11-24 |
DE50311455D1 (de) | 2009-06-04 |
DE10237408A1 (de) | 2004-02-19 |
US20060118092A1 (en) | 2006-06-08 |
ES2322580T3 (es) | 2009-06-23 |
EP1530676B1 (de) | 2009-04-22 |
EP1530676B9 (de) | 2009-11-04 |
US7373927B2 (en) | 2008-05-20 |
EP1530676A1 (de) | 2005-05-18 |
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