EP1396625B1 - Procédé et disposotif de commande d'un injecteur - Google Patents

Procédé et disposotif de commande d'un injecteur Download PDF

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Publication number
EP1396625B1
EP1396625B1 EP03015277A EP03015277A EP1396625B1 EP 1396625 B1 EP1396625 B1 EP 1396625B1 EP 03015277 A EP03015277 A EP 03015277A EP 03015277 A EP03015277 A EP 03015277A EP 1396625 B1 EP1396625 B1 EP 1396625B1
Authority
EP
European Patent Office
Prior art keywords
temperature
injector
actuator
variable
energy
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.)
Expired - Lifetime
Application number
EP03015277A
Other languages
German (de)
English (en)
Other versions
EP1396625A3 (fr
EP1396625A2 (fr
Inventor
Johannes-Joerg Rueger
Andreas Huber
Udo Schulz
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 EP1396625A2 publication Critical patent/EP1396625A2/fr
Publication of EP1396625A3 publication Critical patent/EP1396625A3/fr
Application granted granted Critical
Publication of EP1396625B1 publication Critical patent/EP1396625B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2065—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit the control being related to the coil temperature

Definitions

  • the invention relates to a method and a device for controlling an injector.
  • electrical energy is the energy which is the difference between the energy supplied during charging and discharged during discharging, this difference being reduced by the mechanical energy required by the injector.
  • the electrical energy supplied to the injector is determined based on first operating parameters (AN, U, N).
  • first operating parameters are preferably the number of actuations AN per time unit, the rotational speed N and / or the actuator voltage U.
  • other variables can also be used.
  • the heat transfer factor is determined on the basis of second operating parameters (P).
  • P second operating parameters
  • the rail pressure or the rail pressure and other sizes is used.
  • FIGS. 1 and 2 each show a block diagram of an embodiment according to the invention.
  • Piezo injectors usually have a hydraulic coupler to decouple the actuator and the actual control valve from each other. This ensures that the different thermal behavior of the two elements does not affect the opening behavior of the control valve.
  • pressure is built up in the coupler to position the control valve. About leakage gaps while a part of the fuel located in the coupler is pushed out of this.
  • Such piezoelectric actuators have, depending on the choice of the piezoceramic used, a temperature-dependent lifting capacity. As a result of the changed lifting capacity, the drive voltage of the actuator is tracked. This means that when controlling the actuator, the temperature of the actuator must be taken into account. The problem is the determination of the temperature, since this is usually not measured directly on the actuator or only with considerable technical effort, a measurement is possible.
  • the power loss QZ corresponds to the actuator energy supplied by energy losses.
  • FIG. 1 shows a first embodiment of the procedure according to the invention.
  • the heat energy QZ supplied to the actuator is stored as a function of different input variables.
  • the heat transfer factor KW is stored as a function of various operating parameters. These two quantities reach a node 115 whose output signal DT corresponds to the temperature difference between the output of the piezoelectric actuator and the piezoelectric actuator. This signal reaches the point of connection 120, at whose second input the output signal of a third characteristic field 130 is present. The output of the third map 130 corresponds to the fuel temperature TD. By linking the two temperature values, the temperature of the actuator TA results. This signal passes from the node 120 to a controller 140, which further processes this signal TA.
  • quantities are supplied to the first map 100 as input variables which influence the energy input into the actuator per unit of time.
  • This size corresponds to the energy losses.
  • the speed is used.
  • the voltage U, which is applied to the actuator is preferably additionally or alternatively used.
  • the number of cylinders, the rail pressure and / or the number of partial injections can additionally be supplied to the first characteristic map.
  • the heat QZ which is supplied to the actuator is stored in the first characteristic map 100. This is essentially the product of the loss energy for a drive and the number of drives per time. In determining the loss energy, the difference between the energy supplied during the charging process and the energy dissipated during the discharge process is usually corrected in order to determine the mechanical energy requirement per activation.
  • the heat transfer factor is usually stored in the second map 110 as a function of the rail pressure P and a constant K.
  • the constant K essentially takes into account the geometry and material parameters that determine the heat transfer between the actuator module and the fuel.
  • the rail pressure P influences the flow rate of the fuel, which in turn affects the heat transfer.
  • the third map 130 basically includes a fuel temperature correction model to which the fuel temperature TK and the rotational speed are supplied. Furthermore, other variables, such as the ambient temperature and / or the driving speed can be taken into account.
  • the actual map or this correction model is provided when the fuel temperature TD is not measured directly, but is determined based on other temperature values, such as the fuel temperature in the rail.
  • the corresponding quantities can also be determined in another way on the basis of the input variables.
  • connection point 115 By quotient formation in the connection point 115, the temperature difference between the actuator temperature and the fuel temperature is obtained on the basis of the heat which is supplied to the injector and the heat transfer factor KW. By linking in the connection point 120, this results in the actual actuator temperature TA. This is then taken into account by the controller 140 in the control of the actuators.
  • the variables which are supplied to the first, the second and the third map can be detected directly by means of sensors or are present in the control unit 140 for controlling the internal combustion engine.
  • FIG. 2 shows a further embodiment of the procedure according to the invention. This is a simplified embodiment in which a constant value is used for the heat transfer factor KW and a measured value for the temperature TD of the fuel.
  • the heat energy QZ results from Multiplication of the number of drives per unit time with the energy loss per control, which is preferably specified depending on the drive voltage U.
  • a node 200 occurs, to which the number ON of the drives per time and the output of a characteristic 210 are supplied.
  • the characteristic curve 210 determines the loss energy per actuation based on at least the actuator voltage U.
  • the second characteristic field 110 is replaced by a read-only memory 220 and the third characteristic field 130 by a sensor 230 which immediately provides a signal which determines the temperature at the output of the sensor Determined actuator.
  • block 110 may optionally be replaced by read-only memory 220, correction module 130 by sensor 230, and / or first map 100 by blocks 200 and 210.

Landscapes

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

Claims (6)

  1. Procédé de commande d'un injecteur selon lequel la commande, tient compte d'une grandeur de température (TA) caractérisant la température de l'injecteur,
    caractérisé en ce que
    partant d'une première grandeur (QZ) caractérisant l'énergie électrique appliquée à l'injecteur, d'un coefficient de transfert de chaleur (KW) et d'une seconde grande caractérisant la température (TD) du carburant, on détermine la grandeur de température (TA).
  2. Procédé selon la revendication 1,
    caractérisé en ce qu'
    on détermine la première grandeur (QZ) à partir des premiers paramètres de fonctionnement (AN, U ou N).
  3. Procédé selon l'une des revendications précédentes,
    caractérisé en ce qu'
    on détermine le coefficient de transfert de chaleur (KW) à partir de seconds paramètres de fonctionnement (P).
  4. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce qu'
    on détermine la troisième grandeur à partir d'une valeur de mesure de la température (TK) et d'au moins un autre paramètre de fonctionnement (N).
  5. Procédé selon l'une des revendications précédentes,
    caractérisé en ce qu'
    on saisit la troisième grandeur (TD) à l'aide d'un capteur.
  6. Dispositif de commande d'un injecteur selon lequel une grandeur de température (TA) qui caractérise la température de l'injecteur qui tient compte pour la commande,
    caractérisé par
    des moyens qui, partant d'une première grandeur (QZ) caractérisant l'énergie électrique appliquée à l'injecteur, déterminent un coefficient de transfert de chaleur (KW) et à partir d'une seconde grandeur caractérisant la température de carburant (TD), ils déterminent la grandeur de température (TA).
EP03015277A 2002-09-07 2003-07-07 Procédé et disposotif de commande d'un injecteur Expired - Lifetime EP1396625B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002141506 DE10241506A1 (de) 2002-09-07 2002-09-07 Verfahren und Vorrichtung zur Steuerung eines Injektors
DE10241506 2002-09-07

Publications (3)

Publication Number Publication Date
EP1396625A2 EP1396625A2 (fr) 2004-03-10
EP1396625A3 EP1396625A3 (fr) 2004-09-08
EP1396625B1 true EP1396625B1 (fr) 2007-09-26

Family

ID=31502469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03015277A Expired - Lifetime EP1396625B1 (fr) 2002-09-07 2003-07-07 Procédé et disposotif de commande d'un injecteur

Country Status (3)

Country Link
EP (1) EP1396625B1 (fr)
JP (1) JP4348146B2 (fr)
DE (2) DE10241506A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015208367A1 (de) 2015-05-06 2016-11-10 Robert Bosch Gmbh Verfahren zum Bestimmen der Temperatur eines Piezoaktors

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5125092B2 (ja) * 2006-12-19 2013-01-23 株式会社デンソー 駆動回路、燃料噴射用圧電素子の駆動回路、および燃料噴射装置
DE102008042831A1 (de) 2008-10-14 2010-04-15 Robert Bosch Gmbh Verfahren und Vorrichtung zum zur Ermittlung einer Injektortemperatur
DE102008043594A1 (de) 2008-11-10 2010-05-12 Robert Bosch Gmbh Verfahren und Vorichtung zur Ermittlung einer Injektortemperatur
DE102010042364B4 (de) 2010-10-13 2018-11-22 Robert Bosch Gmbh Verfahren und Vorrichtung zur Ermittlung einer Aktortemperatur eines Kraftstoffinjektors für eine Brennkraftmaschine
DE102012209616A1 (de) * 2012-06-08 2013-12-12 Robert Bosch Gmbh Anordnung mit einem piezoelektrischen Aktor und einer Steuerung sowie Verfahren zur Ansteuerung eines piezoelektrischen Aktors

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4082066A (en) * 1976-05-03 1978-04-04 Allied Chemical Corporation Modulation for fuel density in fuel injection system
DE3832101A1 (de) * 1988-09-21 1990-03-22 Voest Alpine Automotive Verfahren und vorrichtung zur messung der kraftstofftemperatur bei einer elektronisch geregelten brennkraftmaschine
DE19606965A1 (de) * 1996-02-24 1997-08-28 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung der Kraftstoffzumessung in eine Brennkraftmaschine
US6148800A (en) * 1999-04-01 2000-11-21 Daimlerchrysler Corporation Injection temperature fuel feedback

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015208367A1 (de) 2015-05-06 2016-11-10 Robert Bosch Gmbh Verfahren zum Bestimmen der Temperatur eines Piezoaktors

Also Published As

Publication number Publication date
DE50308271D1 (de) 2007-11-08
JP4348146B2 (ja) 2009-10-21
DE10241506A1 (de) 2004-03-18
JP2004100702A (ja) 2004-04-02
EP1396625A3 (fr) 2004-09-08
EP1396625A2 (fr) 2004-03-10

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