EP2386021B1 - Procédé permettant de faire fonctionner un système d'injection de carburant - Google Patents

Procédé permettant de faire fonctionner un système d'injection de carburant Download PDF

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Publication number
EP2386021B1
EP2386021B1 EP09764832A EP09764832A EP2386021B1 EP 2386021 B1 EP2386021 B1 EP 2386021B1 EP 09764832 A EP09764832 A EP 09764832A EP 09764832 A EP09764832 A EP 09764832A EP 2386021 B1 EP2386021 B1 EP 2386021B1
Authority
EP
European Patent Office
Prior art keywords
valve
delay time
determined
closing delay
closing
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.)
Not-in-force
Application number
EP09764832A
Other languages
German (de)
English (en)
Other versions
EP2386021A1 (fr
Inventor
Klaus Joos
Ruben Schlueter
Jens Neuberg
Helerson Kemmer
Holger Rapp
Haris Hamedovic
Joerg Koenig
Anh-Tuan Hoang
Bernd Wichert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2386021A1 publication Critical patent/EP2386021A1/fr
Application granted granted Critical
Publication of EP2386021B1 publication Critical patent/EP2386021B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02D2041/2055—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
    • 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
    • F02D41/32—Controlling fuel injection of the low pressure type
    • F02D41/34—Controlling fuel injection of the low pressure type with means for controlling injection timing or duration
    • 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
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/401—Controlling injection timing

Definitions

  • the invention relates to a method for operating a fuel injection system according to the preamble of claim 1.
  • the invention further relates to a computer program, an electrical storage medium and a control and / or regulating device.
  • valve needle a valve element
  • electromagnetic actuator which essentially comprises a magnetic coil and a magnet armature.
  • the valve closing causes a perceptible noise.
  • the main reason for this is the rapid impact of the valve element in the associated seat of the injection valve.
  • the DE 101 48 218 A1 proposes to generate a short braking pulse to decelerate the valve element before reaching the valve seat.
  • the object of the invention is to further develop a method of the type mentioned, in which the fuel injection system, in particular when closing the injector, operates very quietly, without this being at the expense of a metering accuracy of the injector.
  • the braking pulse causes the structure of a braking force and thus allows a gentle placement of the valve element in the seat.
  • the braking pulse usually results from a braking current pulse in the solenoid.
  • the injection valves have a different closing dynamics (due to specimen scatters, for example, a closing spring force, a valve needle stroke or a magnetic force curve) and therefore react differently to the braking current pulse.
  • the structure of the brake current pulse in injectors with a rather long closing delay time is still carried out at a comparatively large valve needle and correspondingly low valve element speed.
  • valve element In injectors with a low closing delay time at the time of braking force build-up, the valve element already has a significant impulse (high valve element speed) and would be slowed down only slightly as a result, with the same braking current pulse.
  • closing delay time may depend on the operating point of the injectors. All this affects the valve opening duration, which results in the same brake current pulse being able to cause variations in the fuel injection amount depending on the model.
  • the closing speed of the injection valve is changed in such a way that the valve element can seat reliably and largely independent of manufacturing tolerances and the current operating point at reduced speed on the valve seat of the fuel injection valve.
  • the closing delay time for determining the desired injection quantity
  • the use of other operating variables is conceivable, such as, for example, the valve opening duration or an electrical variable for actuating the valve element.
  • the method can be used for one-part and multi-part armature.
  • the time of actual closing of the valve element can be detected by structure-borne sound measurements and then compared with the time of switching off a drive signal for actuating the valve element.
  • the inventive method thus reduces the disturbing noise when driving the valve element into the seat and ensures the required metering accuracy.
  • the parameter (s) of the braking pulse is / are a time position, a duration and / or an amplitude.
  • the brake current pulse in injectors with a short closing delay time can be closer to the driving end in time and be impressed with a higher amplitude in the solenoid of the injection valve as injection valves with a long closing delay.
  • the mentioned parameters offer the possibility of a very exact design of the braking pulse.
  • valve opening duration or the corresponding variable is set as a function of a desired injection quantity. It is thus possible for the valve opening duration (or the corresponding variable) influenced by the brake current pulse to be fed to a controller and adjusted by means of a known method to a setpoint value of the valve opening duration which is dependent on the desired injection quantity.
  • a simple way to generate the braking pulse is that a positive voltage is applied to the solenoid of the solenoid-operated injection valve. This will cause the during the closing process Magnetic force already decaying increases again at a time determined by the control and / or regulating device, thereby actively establishing a braking force for the injection valve.
  • the positive voltage can be tapped either from the electrical system or from a charged to a higher voltage level boost capacitor.
  • the brake pulse may also be generated by shorting the solenoid of the solenoid operated injector.
  • Shortcircuiting corresponds in circuit terms to a free-wheeling of the output stage of the control and / or regulating device.
  • eddy currents commutate from the core of the magnetic coil and the armature back into the magnetic coil.
  • the power reduction is slowed down, starting from a currently prevailing magnetic force level considerably.
  • the effect of the braking current on the armature movement is the greater, the sooner after the Anberichtende the solenoid is short-circuited.
  • the closing time (or the corresponding size) can be determined by determining the closing time on the basis of a curve of a voltage at the magnetic coil.
  • the brake current pulse is already completed at the time of the magnetic armature closing, so that the detection of the closing time can take place via the course of the voltage at the magnetic coil, which is still effective and thus measurable at the time of magnet armature closing.
  • the closing time (or the corresponding amount) can be determined by determining the closing time on the basis of a waveform of the current in the solenoid, since the braking current at the time of closing the armature is still effective and thus measurable.
  • the closing time (or the corresponding size) can be determined by determining the closing time using a distance observer. Regardless of the duration of the brake current pulse, a determination of the closing time can be made via the track observer, wherein the track observer detected one electrical magnitude (eg, the magnetic coil voltage) with at least indirectly observes an electrical variable to be observed (eg solenoid coil current) and draw conclusions about the closing time.
  • one electrical magnitude eg, the magnetic coil voltage
  • an electrical variable to be observed eg solenoid coil current
  • FIG. 1 For example, in an internal combustion engine of a motor vehicle having a common rail for direct injection of fuel, it may be incorporated into a combustion chamber (not shown). It comprises an electromagnetic actuating device 2 and a valve needle 3 forming a valve element, which cooperates with a valve seat 4. A spring element 5 arranged around the valve needle 3 presses the valve needle 3 into the valve seat 4 with its spring force.
  • the electromagnetic actuating device 2 comprises a magnet armature 6, which in the present exemplary embodiment is firmly connected to the valve needle 3, and a magnet coil 7. The magnet coil 7 becomes energized by a control and regulating device 8 and a power stage, not shown.
  • an electromagnetic field is generated by energizing the magnetic coil 7, which magnetizes a magnetic material.
  • the magnet armature 6 is tightened, the with it connected valve needle 3 from the valve seat 4 lifts.
  • outlet openings (not shown) of the injection valve 1 are released, through which the fuel can escape to an injection.
  • the valve needle and the magnet armature can also be made in two parts (not shown).
  • FIG. 2 shows in an upper diagram a time course of a drive current I and in a lower diagram thereby caused a stroke H of the valve needle 3.
  • the course of the drive current I shows a first rapid increase (see reference numeral 10) of the current I, which then over a certain Period is kept constant, then about to fall by half (see reference numeral 12). This current level is maintained until the end of the control period t i .
  • the current I is switched off (see reference numeral 14).
  • two scenarios are shown, wherein the first scenario is represented by a solid line and the second scenario by a dotted line and by a time period t v forward in time.
  • a short current pulse 16 or 16 starts at a time interval t from the control end x ', ie, the time t x determines the temporal position of the current pulse 16 from the control end.
  • the amplitude, the time position and the length of the current or braking pulse are shown here by way of example and can vary in real operation depending on a valve delay time. A closer description will be given later.
  • valve needle 3 of the injection valve 1 lifts off after the beginning of the activation only after a certain opening delay time t 11 (see reference numeral 18). If the valve needle 3 reaches its maximum stroke after the time t i has elapsed, a lesser current I is sufficient to maintain this level. If the drive current I is switched off at the end of the actuation period t i , the valve needle 3 begins to decrease after a closing delay time t 21 (reference numeral 20). During the lowering movement 20, the current pulse 16 (brake current pulse) sets in, which reduces the lowering speed of the valve needle 3 in that a magnetic force is generated by it, which counteracts the lowering movement of the valve needle 3. The valve needle 3 lowers gently into the valve seat 4, which leads to a desired noise reduction. However, a closing time is shifted, ie a valve opening period T op is thus extended by the time t a .
  • the movement of the valve needle 3 would have a course (shown in an idealized manner) similar to the dashed line 22.
  • the injection would have ended in the intended valve opening duration T op .
  • the extension time t a is compensated by a control loop, so that despite the action of the braking current pulse 16, the target valve opening period T op can be maintained.
  • FIG. 3 shows a flowchart of the inventive method.
  • the illustrated sequence is to be applied individually for each injection valve of a motor vehicle in the control and regulating device 8.
  • the method works as follows:
  • the control and regulating device 8 determines a control start and a drive end to a desired valve opening duration T op of the injection valve 1.
  • the individual closing delay time t 21 of the injection valve 1 is determined.
  • the closing delay time t 21 is influenced by specimen scattering, for example a closing spring force, a valve needle stroke or a magnetic force course.
  • the temporal position (time), the duration and the amplitude of the brake current pulse 16 are determined by evaluating the closing delay time t 21 .
  • the brake current pulse 16 takes place in an injection valve 1 with a rather long closing delay time t 21, even with a comparatively large valve needle stroke H and a correspondingly low valve needle speed. So it is sufficient a brake current pulse 16 with small amplitude and small duration.
  • the valve needle 3 quickly at a high speed and would be slowed down only slightly as a result of the same brake current pulse 16. Therefore, here a brake current pulse 16 with high amplitude and long duration is necessary.
  • the closing delay time t 21 is also dependent on an operating point of the injection valve 1.
  • the temporal position t x of the braking current pulse 16 is determined by the driving end.
  • the brake current pulse 16 results in an extension of the valve opening duration T op (see time t a ).
  • the prolonged valve opening duration (T op + t a ) triggered by the braking current pulse 16 is regulated by a control loop to the previously determined desired value.
  • the result of the adjustment is in FIG. 3 shown dotted. This is the Control end of the valve needle 3 advanced by the determined time t v (see upper diagram). This means that the drive signal and thus the drive time t i is shortened (see edge 14 '). Since the brake current pulse 16 follows in the previously determined time interval t x to the drive end, the brake current pulse 16 'is also advanced.
  • the drive duration t x is shortened so that the closing end of the valve needle 3 falls exactly on the determined timing of the target valve opening duration T op.
  • the required metering accuracy is achieved.

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)
  • Magnetically Actuated Valves (AREA)

Claims (12)

  1. Procédé permettant de faire fonctionner un système d'injection de carburant, dans lequel le carburant arrive dans au moins une chambre de combustion du moteur à combustion interne en partant d'une soupape d'injection (1) actionnée de façon électromagnétique et dans lequel le mouvement d'un élément de soupape (3) de la soupape d'injection (1) est influencé au moins temporairement par une impulsion de freinage (16) électromagnétique, caractérisé en ce qu'un temps de décalage de fermeture de la soupape d'injection (1) ou une grandeur correspondant au temps de décalage de fermeture est calculée et que le temps de décalage de fermeture calculé ou la grandeur correspondante est utilisé pour déterminer au moins un paramètre de l'impulsion de freinage (16).
  2. Procédé selon la revendication 1, caractérisé en ce que le ou les paramètres de l'impulsion de freinage (16) est une position dans le temps, une durée et/ou une amplitude.
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une durée d'ouverture de soupape ou une grandeur correspondante est calculée en utilisant le temps de décalage de fermeture ou la grandeur correspondante et l'au moins un paramètre de l'impulsion de freinage (16).
  4. Procédé selon la revendication 3, caractérisé en ce que la durée d'ouverture de soupape ou la grandeur correspondante est réglée en fonction d'une quantité d'injection théorique.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'impulsion de freinage (16) est réalisée par application active d'une tension positive au niveau d'une bobine d'aimant (7) de la soupape d'injection (1) actionnée de façon électromagnétique.
  6. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'impulsion de freinage (16) est réalisée par court-circuitage d'une bobine d'aimant (7) de la soupape d'injection (1) actionnée de façon électromagnétique.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le temps de décalage de fermeture ou la grandeur correspondante est calculé sur la base d'une courbe de tension appliquée au niveau de la bobine d'aimant (7).
  8. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le temps de décalage de fermeture ou la grandeur correspondante est calculé sur la base d'une courbe représentant le courant passant dans la bobine d'aimant (7).
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le temps de décalage de fermeture est calculé en utilisant un observateur de course.
  10. Programme informatique, caractérisé en ce qu'il permet de mettre en oeuvre un procédé selon l'une quelconque des revendications précédentes.
  11. Support de mémoire électrique conçu pour un dispositif de commande et/ou de régulation (8) d'un moteur à combustion interne, caractérisé en ce qu'il contient en mémoire un programme informatique permettant de mettre en oeuvre un procédé selon l'une quelconque des revendications 1 à 9.
  12. Dispositif de commande et/ou de régulation (8) pour un moteur à combustion interne, caractérisé en ce qu'il permet de mettre en oeuvre un procédé selon l'une quelconque des revendications 1 à 9.
EP09764832A 2009-01-09 2009-12-04 Procédé permettant de faire fonctionner un système d'injection de carburant Not-in-force EP2386021B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910000132 DE102009000132A1 (de) 2009-01-09 2009-01-09 Verfahren zum Betreiben eines Kraftstoffeinspritzsystems
PCT/EP2009/066446 WO2010079027A1 (fr) 2009-01-09 2009-12-04 Procédé permettant de faire fonctionner un système d'injection de carburant

Publications (2)

Publication Number Publication Date
EP2386021A1 EP2386021A1 (fr) 2011-11-16
EP2386021B1 true EP2386021B1 (fr) 2012-10-10

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EP09764832A Not-in-force EP2386021B1 (fr) 2009-01-09 2009-12-04 Procédé permettant de faire fonctionner un système d'injection de carburant

Country Status (4)

Country Link
EP (1) EP2386021B1 (fr)
CN (1) CN102272436B (fr)
DE (1) DE102009000132A1 (fr)
WO (1) WO2010079027A1 (fr)

Families Citing this family (19)

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Publication number Priority date Publication date Assignee Title
DE102009045309B4 (de) * 2009-10-02 2020-02-06 Robert Bosch Gmbh Verfahren und Steuergerät zum Betreiben eines Ventils
DE102009045581A1 (de) * 2009-10-12 2011-04-14 Robert Bosch Gmbh Schaltung zum Betreiben eines Magnetventils
DE102010014825A1 (de) * 2010-04-13 2011-10-13 Continental Automotive Gmbh Verfahren zum Betrieb eines Einspritzsystems und ein Einspritzsystem, welches ein Einspritzventil und eine Steuervorrichtung aufweist
DE102011114516A1 (de) * 2010-10-28 2012-05-03 Schaeffler Technologies Gmbh & Co. Kg Verfahren zur Steuerung eines Stellgliedes oder Ventils
DE102011075270A1 (de) * 2011-05-04 2012-11-08 Continental Automotive Gmbh Verfahren und Vorrichtung zum Steuern eines Ventils
JP5639970B2 (ja) * 2011-08-03 2014-12-10 日立オートモティブシステムズ株式会社 電磁弁の制御方法、高圧燃料供給ポンプの電磁吸入弁の制御方法および電磁吸入弁の電磁駆動機構の制御装置
JP5572604B2 (ja) * 2011-08-31 2014-08-13 日立オートモティブシステムズ株式会社 燃料噴射弁の制御装置
EP2574764A1 (fr) * 2011-09-30 2013-04-03 Delphi Automotive Systems Luxembourg SA Détermination de la vitesse d'une aiguille d'injecteur d'un injecteur de carburant à solénoïde et procédé de contrôle
DE102014202096A1 (de) * 2014-02-05 2015-08-06 Continental Automotive Gmbh Verfahren zum Betrieb eines Einspritzventils sowie Verfahren zum Betrieb mehrerer Einspritzventile
DE102014203538A1 (de) * 2014-02-27 2015-08-27 Robert Bosch Gmbh Verfahren zur geräuschmindernden Steuerung von schaltbaren Ventilen, insbesondere von Einspritzventilen einer Brennkraftmaschine eines Kraftfahrzeugs
DE102015217955A1 (de) * 2014-10-21 2016-04-21 Robert Bosch Gmbh Vorrichtung zur Steuerung von wenigstens einem schaltbaren Ventil
DE102015207274A1 (de) * 2015-04-22 2016-10-27 Robert Bosch Gmbh Verfahren zur geräuschmindernden Ansteuerung von schaltbaren Ventilen, insbesondere von Einspritzventilen einer Brennkraftmaschine eines Kraftfahrzeugs
DE102015212666A1 (de) * 2015-07-07 2017-01-12 Continental Automotive Gmbh Verbesserte Ansteuerung eines Kraftstoffinjektors während eines Schließvorgangs
DE102016210449B3 (de) 2016-06-13 2017-06-08 Continental Automotive Gmbh Verfahren und Vorrichtung zur Ermittlung von Bestromungsdaten für ein Stellglied eines Einspritzventils eines Kraftfahrzeugs
DE102016218515A1 (de) * 2016-09-27 2018-03-29 Robert Bosch Gmbh Verfahren zur Steuerung von schaltbaren Ventilen, insbesondere von Einspritzventilen einer Brennkraftmaschine eines Kraftfahrzeugs
DE102021101335A1 (de) * 2021-01-22 2022-07-28 Amazonen-Werke H. Dreyer SE & Co. KG Verfahren zum Ansteuern eines zur Durchflussmengensteuerung eingesetzten Magnetventils einer landwirtschaftlichen Ausbringmaschine
DE102021203773A1 (de) 2021-04-16 2022-10-20 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zur Ansteuerung eines elektromagnetisch ansteuerbaren Gasventils, Steuergerät, Computerprogramm und Computerprogrammprodukt
DE102021204097A1 (de) 2021-04-26 2022-10-27 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zur Ansteuerung eines elektromagnetisch ansteuerbaren Gasventils, Steuergerät, Computerprogramm und Computerprogrammprodukt
DE102022209912A1 (de) * 2022-09-21 2024-03-21 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Betreiben eines Gasinjektors

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US5975053A (en) * 1997-11-25 1999-11-02 Caterpillar Inc. Electronic fuel injection quiet operation
DE10148218B4 (de) 2001-09-28 2005-08-25 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine, Computerprogramm, Steuer- und/oder Regelgerät, sowie Kraftstoffsystem für eine Brennkraftmaschine
DE10235196B4 (de) * 2002-08-01 2013-07-11 Robert Bosch Gmbh Verfahren zum Ansteuern eines elektromagnetisch betätigten Schaltventils sowie eine Anlage mit einem solchen Schaltventil
JP4515729B2 (ja) * 2003-01-30 2010-08-04 株式会社デンソー 燃料噴射装置
DE102006043677A1 (de) * 2005-12-12 2007-06-14 Robert Bosch Gmbh Verfahren zur Ansteuerung eines Magnetventils
DE102007023898A1 (de) * 2007-05-23 2008-11-27 Robert Bosch Gmbh Verfahren zum Ansteuern eines Einspritzventils

Also Published As

Publication number Publication date
WO2010079027A1 (fr) 2010-07-15
EP2386021A1 (fr) 2011-11-16
CN102272436A (zh) 2011-12-07
CN102272436B (zh) 2013-12-25
DE102009000132A1 (de) 2010-07-15

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