WO2014183963A1 - Procédé pour obtenir des informations en rapport avec des grandeurs de fonctionnement de systèmes d'injection - Google Patents

Procédé pour obtenir des informations en rapport avec des grandeurs de fonctionnement de systèmes d'injection Download PDF

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Publication number
WO2014183963A1
WO2014183963A1 PCT/EP2014/058188 EP2014058188W WO2014183963A1 WO 2014183963 A1 WO2014183963 A1 WO 2014183963A1 EP 2014058188 W EP2014058188 W EP 2014058188W WO 2014183963 A1 WO2014183963 A1 WO 2014183963A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
injection
measurements
actuator
charge
Prior art date
Application number
PCT/EP2014/058188
Other languages
German (de)
English (en)
Inventor
Hans-Jörg Wiehoff
Tany GARGISO
Michael Katzenberger
Original Assignee
Continental Automotive 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 Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2014183963A1 publication Critical patent/WO2014183963A1/fr

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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
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2464—Characteristics of actuators
    • F02D41/2467—Characteristics of actuators for injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure
    • F02D2200/0604—Estimation of fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0618—Actual fuel injection timing or delay, e.g. determined from fuel pressure drop
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/24—Fuel-injection apparatus with sensors
    • F02M2200/244—Force sensors
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/24—Fuel-injection apparatus with sensors
    • F02M2200/247—Pressure sensors
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/005—Fuel-injectors combined or associated with other devices the devices being sensors

Definitions

  • the present invention relates to a method for obtaining information relating to operating variables of injection systems of internal combustion engines, which have injectors actuated by piezo actuators, which information is obtained from voltage and / or charge measurements on the piezoactuator acting as a sensor.
  • the nozzle needle of the respective injection valve is controlled by a piezo actuator.
  • an electrical voltage is applied to the piezoactuator, it increases its length, so that a position control of the nozzle needle of the injection valve can be carried out in this way.
  • injectors are very high demands on the accuracy and robustness of the injection quantity under all operating conditions and over the entire life of the associated vehicle.
  • Disturbances with respect to the feedback signal during the active phase of the piezo actuator are, inter alia, by the drive profile of the associated output stage for current application, by the idle stroke in the power transmission between the piezo actuator and nozzle needle, by friction effects in the nozzle needle and the actual Lifting behavior of the piezo actuator generated.
  • the present invention has for its object to provide a method of the type described above, with the particularly trouble-free information can be obtained.
  • the inventive concept is based thereon, the required voltage and / or charge measurements to obtain the desired information in relation to the operating variables not during the active operating phase of the piezo actuator perform ⁇ in which it acts as an actuator, but during its passive phase of operation.
  • the invention makes use of the sensory properties of the piezoelectric actuator in its passive operating phase and makes use of the fact that corresponding operating variables (force, pressure, etc.) and / or corresponding changes in the operating variables of the system also occur in the passive phase of the piezoactuator / or charge measurements can be recorded directly on the actuator.
  • Such operating variables or operating variable changes induce voltages / voltage changes and / or charges / charge changes and enable the derivation of injection-relevant operating variables. This data is from the point of immunity is robust ⁇ adjustable and expand the observability of the operating behavior of the injection system.
  • pressure and / or temporal information einspritzre ⁇ relevant operating variables can be obtained by voltage and / or charge measurements.
  • the injection and combustion ⁇ behavior can be observed with reduced interference potential.
  • Runaway during the passive phase ⁇ led voltage and / or charge measurements feedback signals can be obtained, which are used to injection quantity adaptation.
  • the feedback signals obtained here can in addition to during the active phase of the piezo actuator generated feedback signals are used.
  • additional information can be obtained in particular with which the observability of the operating behavior of the injection system can be extended.
  • the voltage and / or charge measurements are carried out permanently during the passive operating phase of the piezoactuator. Since the passive operating phase is usually about ten times as large as the active operating phase of a piezo actuator, information relating to operating variables of injection systems of internal combustion engines can thus be provided in a permanent manner with the method according to the invention Viewpoint of noise immunity are robust representable.
  • the present invention carried out voltage and / or La ⁇ dung measurements can be carried out simultaneously during the passive phase of operation of piezoelectric actuators more injectors. In this way, a plausibility of the measured signals can be carried out.
  • a corresponding measurement can be carried out simultaneously with three piezo actuators, which leads to a significant increase in robustness. By means of a corresponding signal adjustment, therefore, the accuracy of the information obtained is further increased.
  • the voltage and / or charge measurements are preferably carried out under the boundary condition of high-impedance output impedance of an output stage.
  • a corresponding discharge resistor is used to discharge the piezo actuator after completion of the active phase first.
  • the corresponding Entladecharakte ⁇ rrick is then taken into in the performed analysis so that no distortions of the measurement results occur.
  • Figure 1 is a schematic diagram of the voltage measurement at the piezoelectric actuator
  • FIG. 2 is a schematic flowchart of an embodiment. r
  • FIG. 3 is a schematic representation of the invention
  • FIG. 1 shows a schematic diagram of the voltage measurement on the piezo actuator during the passive phase of operation thereof.
  • the voltage measurement is carried out under the boundary condition of high-impedance output impedance of an output stage.
  • an output stage 2 is shown, which acts on a piezoelectric actuator 1 with a defined current to produce in a controlled manner certain stroke conditions of the piezoelectric actuator 1.
  • the piezo actuator is first discharged for safety reasons, for which purpose a discharge resistor 3 is used.
  • the signal evaluation ⁇ ⁇ the corresponding discharge characteristic is taken into account and calculated out accordingly.
  • the voltage measured during the passive phase of the piezoactuator 1 is used as a feedback signal in order to obtain corresponding information relating to operating variables of the associated injection system.
  • FIG. 2 shows, in a schematic flowchart, the implementation of the method according to the invention in an exemplary embodiment.
  • step 10 set points related to the opening / closing timing of the injector nozzle needle are input in the form of voltage and / or charge values for the associated piezo actuator.
  • step 11 a corresponding control of the piezo actuator with associated admission of the nozzle needle takes place. This is the usual Procedure.
  • corresponding actual values of the voltage and / or charge are then measured during the active phase of the piezoelectric actuator and used in the form of feedback signals for regulating the mode of operation of the piezoelectric actuator. This is indicated in FIG. 2 with step 12.
  • corresponding voltage and / or charge measurements are carried out on the piezoactuator in the passive phase of the piezoactuator, as indicated by step 13.
  • the measured values are also used as feedback signals for controlling the piezo actuator. In this way, additional information can be obtained in relation to the operating variables of the injection system, which can be used to control or adaptation of the piezo actuators.
  • FIG. 3 shows a schematic representation of the method which is used here for compensating the pressure wave influence of the pump phases.
  • Corresponding setpoints setpoint quantity, a ⁇ spray angle command value
  • corresponding disturbance variables which are given by way of example in FIG. 3, have an effect.
  • the measured values obtained are transferred via detection algorithms into corresponding feedback signals which are used for the adaption of the system pressure of the injection system (adaptation function of the pressure set value ⁇ (pressure-SP)).
  • a corresponding input tax compensation (rail pressure), drive time, injection start, injection quantity, etc.), which can be correspondingly influenced by the adaptation function carried out according to the invention or which is taken into account for the adaptation function.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un procédé pour obtenir des informations en rapport avec des grandeurs de fonctionnement de systèmes d'injection de moteurs à combustion interne qui présentent des soupapes d'injection actionnées par des actionneurs piézoélectriques. Les informations sont obtenues à partir de mesures de tension et/ou de charge sur l'actionneur piézoélectrique agissant comme capteur, les mesures de tension et/ou de charge étant effectuées pendant la phase de fonctionnement passive de l'actionneur piézoélectrique au cours de laquelle celui-ci n'est pas actif comme actionneur. Des informations particulièrement fiables et des informations supplémentaires peuvent ainsi être obtenues.
PCT/EP2014/058188 2013-05-15 2014-04-23 Procédé pour obtenir des informations en rapport avec des grandeurs de fonctionnement de systèmes d'injection WO2014183963A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013208998.8 2013-05-15
DE201310208998 DE102013208998A1 (de) 2013-05-15 2013-05-15 Verfahren zum Gewinnen von Informationen in Bezug auf Betriebsgrößen von Einspritzsystemen

Publications (1)

Publication Number Publication Date
WO2014183963A1 true WO2014183963A1 (fr) 2014-11-20

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Application Number Title Priority Date Filing Date
PCT/EP2014/058188 WO2014183963A1 (fr) 2013-05-15 2014-04-23 Procédé pour obtenir des informations en rapport avec des grandeurs de fonctionnement de systèmes d'injection

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Country Link
DE (1) DE102013208998A1 (fr)
WO (1) WO2014183963A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014224488A1 (de) * 2014-12-01 2016-06-16 Volkswagen Aktiengesellschaft Verfahren zum Betreiben einer Brennkraftmaschine
DE102019212047A1 (de) * 2019-08-12 2021-02-18 Robert Bosch Gmbh Verfahren zum Betreiben einer Kraftstoffversorgungseinrichtung eines Verbrennungsmotors

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005036190A1 (de) * 2005-08-02 2007-02-08 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung eines Einspritzsystems einer Brennkraftmaschine
DE102006055486A1 (de) * 2006-11-24 2008-05-29 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
FR2930347A1 (fr) * 2008-04-30 2009-10-23 Continental Automotive France Capteur d'acceleration piezoelectrique
DE102011007393B3 (de) * 2011-04-14 2012-09-13 Continental Automotive Gmbh Verfahren zur Detektion eines Düsenraumdrucks in einem Injektor und Einspritzsystem

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10236615A1 (de) * 2002-08-09 2004-02-26 Bayerische Motoren Werke Ag Verfahren zum Erfassen eines den Druck im Brennraum einer mit Direkteinspritzung arbeitenden Brennkraftmaschine darstellenden Signals
DE102005036826B4 (de) * 2005-08-04 2007-04-26 Siemens Ag Kraftstoffinjektor zur Ermittlung des Brennraumdrucks in einer Brennkraftmaschine
DE102006027665B3 (de) * 2006-06-14 2007-09-20 Siemens Ag Verfahren und Vorrichtung zum Berechnen eines Ist-Wertes eines Kraftstoffdruckes eines Einspritzsystems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005036190A1 (de) * 2005-08-02 2007-02-08 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung eines Einspritzsystems einer Brennkraftmaschine
DE102006055486A1 (de) * 2006-11-24 2008-05-29 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
FR2930347A1 (fr) * 2008-04-30 2009-10-23 Continental Automotive France Capteur d'acceleration piezoelectrique
DE102011007393B3 (de) * 2011-04-14 2012-09-13 Continental Automotive Gmbh Verfahren zur Detektion eines Düsenraumdrucks in einem Injektor und Einspritzsystem

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DE102013208998A1 (de) 2014-11-20

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