EP1287250B1 - Procede de verification d'un organe de reglage capacitif - Google Patents

Procede de verification d'un organe de reglage capacitif Download PDF

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Publication number
EP1287250B1
EP1287250B1 EP01944976A EP01944976A EP1287250B1 EP 1287250 B1 EP1287250 B1 EP 1287250B1 EP 01944976 A EP01944976 A EP 01944976A EP 01944976 A EP01944976 A EP 01944976A EP 1287250 B1 EP1287250 B1 EP 1287250B1
Authority
EP
European Patent Office
Prior art keywords
actuating element
threshold value
time
charging
current
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
EP01944976A
Other languages
German (de)
English (en)
Other versions
EP1287250A1 (fr
Inventor
Rainer Hirn
Michael KÄSBAUER
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.)
Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1287250A1 publication Critical patent/EP1287250A1/fr
Application granted granted Critical
Publication of EP1287250B1 publication Critical patent/EP1287250B1/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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
    • 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
    • F02D2041/2055—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
    • F02D41/20—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
    • F02D2041/2058—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using information of the actual current value
    • 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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/228—Warning displays

Definitions

  • the invention relates to a method for checking a capacitive actuator, in particular an actuator for a fuel injection valve of an internal combustion engine, on proper function, according to the preamble of the claim 1 or 2.
  • a fuel injection valve For opening, for example, a fuel injection valve an internal combustion engine must have an electric charge on the Actuator are applied to the closing of the injector must be removed again from the actuator.
  • the injected fuel quantity is at constant fuel pressure, for example, in a common rail fuel injection system, mainly dependent on the injection duration.
  • DE 198 45 042 A1 discloses a method for the diagnosis of a capacitive Actuators known, the actuator a specifiable Energy amount is supplied and measured by comparison Values of actuator current, voltage or charge with given Comparison values for faulty functional states of the actuator is closed.
  • the control processes can be due to internal or external influences be disturbed so that the applied to the actuator Charge longer than that output by an engine control system Control signals given, remains on the actuator and the fuel injector for an undefined Duration remains open, causing too much fuel to be injected becomes.
  • the charging current supplied to the actuator + Ip and that of it discharged discharge current -Ip or falling off the actuator Actuator voltage Up are measured and with thresholds compared.
  • FIG. 1a shows the course of a control signal st for a not shown, capacitive actuator of a fuel injection valve an internal combustion engine for a fuel injection process.
  • These control signals are st not shown engine control unit as a result of several Input parameters such as engine speed, load, temperature etc. determined.
  • the control signal st starts at a time t1 and ends at a time t4.
  • the difference t4 - t1 corresponds to the Duration T1 of this control signal st.
  • times or times indicated usually become such Time points for the beginning or end of signals from the engine control unit but output in crankshaft angles (° CA).
  • the actuator is from the time t1 with charged a charging current + Ip.
  • This charging current + Ip exceeds at time t2 a predetermined, first current threshold S1, falls below it at time t3 and then becomes to zero.
  • the actuator is discharged with a discharge current Ip-.
  • the discharge current Ip falls below a time t5 predetermined, second current threshold S2, exceeds this again at time t6 and then becomes zero.
  • FIG. 1c shows the actuator voltage applied to the actuator Up during a drive. This rises from the Beginning of the control signal st at time t1, exceeds at time t2 a predetermined, lower voltage threshold S3 and at time t3 a predetermined, upper Voltage threshold S4. Then she reaches her maximum, which until the end of the control signal st at the time t4 is maintained. With the end of the control signal st falls the actuator voltage Up again, falls below at the time t5 the upper voltage threshold S4 and at time t6 the lower voltage threshold S3 before going back to zero becomes.
  • controlled variables are in the following Sizes denoted by the beginning or the end of the control signal to be measured. This is in any case the Size T1 itself, as well as charging time in this embodiment T2 and discharge time T3. All other sizes, both measured from above or below a threshold value are referred to as "measured" sizes and with provided a star.
  • the charging time T2 extends from the beginning of the control signal st in Time t1 to time t3, in which the charging current + Ip falls below the first current threshold S1.
  • Corresponding the discharge duration T3 extends from the end of the control signal at time t4 until time t6 in which the discharge current -Ip exceeds the second current threshold S2.
  • the charging time T2 and the discharge time T3 are also from the motor control, depending on different parameters, calculated and given; these quantities are calculated, stored and are therefore known. That's why in this Embodiment of these calculated values for charging time T2 and discharge time T3 used to malfunction of the actuator determine.
  • FIGS. 1b and 1e is a method for monitoring a capacitive actuator also by means of the charge or discharge current Ip derived, but "measured" sizes (charging time T2 *, discharge duration T3 * and valve opening duration T4 *).
  • the charging time T2 * starts when the charging current + Ip the first Threshold S1 exceeds, ie at time t2; she ends up in Time t3, when the charging current + Ip the first threshold S1 again falls below.
  • the discharge duration T3 * begins when the discharge current -Ip falls below the second threshold value S2, ie at the time t5; it ends at time t6 when the discharge current -Ip again exceeds the second threshold value S2.
  • t2-t1 t5-t4 in the first approximation.
  • FIGS. 1c and 1d is a method for monitoring a capacitive actuator by means of the actuator voltage Up derived, "controlled" sizes of charging time T2 and discharge time T3 described.
  • the charging time T2 extends from the beginning of the control signal st in Time t1 to time t3, in which the actuator voltage Up exceeds the upper voltage threshold S3. Accordingly, the discharge duration T3 extends from the end of the control signal st at time t4 to time t6, in which the discharge current -Ip the lower voltage threshold S3 again below.
  • the opening time T4 * of the valve operated by the actuator begins when the actuator voltage Up the upper voltage threshold S4 exceeds. It ends at time t6, in which the actuator voltage Up the lower voltage threshold S3 falls below again.
  • the charging time T2 * extends from the time t2, in which the Actuator voltage Up the lower voltage threshold S3 exceeds, until time t3, in which the actuator voltage Up exceeds the upper voltage threshold S4. Accordingly, the discharge duration T3 * extends from the time t5, in which the actuator voltage Up the upper voltage threshold S4 falls below until the time t6, in which the actuator voltage Up the lower voltage threshold S3 falls below again.
  • the opening time T4 * of the valve operated by the actuator also begins in this embodiment, when the Actuator voltage Up the upper voltage threshold S4 exceeds, and ends at the time t6, in which the actuator voltage Up the lower voltage threshold S3 again below.

Landscapes

  • 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)

Claims (5)

  1. Procédé de contrôle du bon fonctionnement d'un organe de réglage capacitif, en particulier destiné à l'actionnement d'un injecteur de carburant d'un moteur à combustion interne, qui est commandé au moyen d'un signal de commande (st) d'une commande de moteur,
       caractérisé en ce qu'on établit les relations liant entre elles
       les grandeurs commandées
    durée T1 du signal de commande (st) depuis son début (t1) jusqu'à sa fin (t4)
    la durée de charge T2 de l'organe de réglage, qui s'étend du début (t1) du signal de commande (st) jusqu'à un instant t3 où le courant de charge (+Ip) de l'organe de réglage devient inférieur à un premier seuil de courant (S1) ou bien où la tension de charge (Up) devient supérieure à un seuil de tension supérieur (S4), et
    la durée de décharge T3 de l'organe de réglage, qui s'étend de la fin (t4) du signal de commande (st) jusqu'à un instant t6 où le courant de décharge (-Ip) de l'organe de réglage devient supérieur à un deuxième seuil (S2) ou bien où la tension de l'organe de réglage (Up) devient inférieure à un seuil de tension inférieur (S3),
    ainsi que la grandeur mesurée
    durée d'ouverture T4* = t6 - t3 d'un injecteur commandé par l'organe de réglage, selon la formule |T1 + T3 - T2 - T4*|≤ X, où X est
    une valeur limite prédéterminée, et un défaut du fonctionnement de l'organe de réglage est diagnostiqué lorsque cette formule n'est pas vérifiée et on prend comme durée de charge (T2) et comme durée de décharge (T3) des valeurs prédéterminées par la commande du moteur et enregistrées.
  2. Procédé de contrôle du bon fonctionnement d'un organe de réglage capacitif, en particulier pour l'actionnement d'un injecteur de carburant d'un moteur à combustion interne, qui est commandé au moyen d'un signal de commande (st) d'une commande de moteur,
       caractérisé en ce qu'on établit la relation liant la grandeur commandée
    durée T1 du signal de commande (st) depuis son début (t1) jusqu'à sa fin (t4), ainsi que les grandeurs mesurées
    durée de charge T2* de l'organe de réglage, qui commence à un instant (t2) où le courant de charge (+Ip) de l'organe de réglage devient supérieur à un premier seuil de courant (S1) ou bien où la tension de l'organe de réglage (Up) devient supérieur à un seuil de tension inférieur (S3), et se termine à un instant (t3) où le courant de charge (+Ip) de l'organe de réglage devient de nouveau inférieur au premier seuil (S1) ou bien où la tension de charge (Up) devient supérieure à un seuil de tension supérieur (S4),
    durée de décharge T3* de l'organe de réglage, qui commence à un instant (t5) où le courant de décharge (-Ip) de l'organe de réglage devient inférieur au deuxième seuil de courant (S2) ou bien où la tension de l'organe de réglage (Up) devient inférieure au seuil de tension supérieur (S4), et se termine à un instant t6 où le courant de décharge (-Ip) de l'organe de réglage devient de nouveau supérieur au deuxième seuil (S2), ou bien où la tension de l'organe de réglage (Up) devient de nouveau inférieure au seuil de tension inférieur (S3), et
    durée d'ouverture T4* = t6 - t3 d'un injecteur actionné par l'organe de réglage, selon la formule |T1 + T3* - T2* - T4*|≤ X, où X est
    une valeur limite prédéterminée, et un défaut du fonctionnement de l'organe de réglage est diagnostiqué lorsque cette formule n'est pas vérifiée et les valeurs mesurées de la durée de charge (T2*) et de la durée de décharge (T3*) sont comparées à des valeurs correspondantes, commandées (T2, T3) de la commande du moteur, et
       un défaut du fonctionnement de l'organe de réglage est aussi diagnostiqué lorsque les grandeurs mesurées s'écartent des grandeurs commandées de plus d'une quantité prédéterminée.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, si un défaut se manifeste plusieurs fois sur un organe de réglage, cet organe de réglage est déconnecté.
  4. Procédé selon une des revendications précédentes, caractérisé en ce que, lorsqu'un défaut se manifeste sur un organe de réglage, il se produit une inscription dans un compte-rendu de défauts.
  5. Procédé selon la revendication 3, caractérisé en ce que, lors de la déconnexion d'un organe de réglage, une lampe témoin s'allume.
EP01944976A 2000-06-08 2001-06-07 Procede de verification d'un organe de reglage capacitif Expired - Lifetime EP1287250B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10028353 2000-06-08
DE10028353A DE10028353C2 (de) 2000-06-08 2000-06-08 Verfahren zur Überprüfung eines kapazitiven Stellgliedes
PCT/DE2001/002136 WO2001094768A1 (fr) 2000-06-08 2001-06-07 Procede de verification d'un organe de reglage capacitif

Publications (2)

Publication Number Publication Date
EP1287250A1 EP1287250A1 (fr) 2003-03-05
EP1287250B1 true EP1287250B1 (fr) 2005-11-23

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EP01944976A Expired - Lifetime EP1287250B1 (fr) 2000-06-08 2001-06-07 Procede de verification d'un organe de reglage capacitif

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US (1) US6853201B2 (fr)
EP (1) EP1287250B1 (fr)
DE (1) DE10028353C2 (fr)
WO (1) WO2001094768A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10213875B4 (de) * 2002-03-27 2006-12-28 Siemens Ag Verfahren und Vorrichtung zum Ansteuern wenigstens eines Piezoaktors
DE10229394A1 (de) * 2002-06-29 2004-01-29 Robert Bosch Gmbh Verfahren, Computerprogramm, Steuer- und/oder Regelgerät zum Betreiben einer Brennkraftmaschine, sowie Brennkraftmaschine
DE10333154A1 (de) * 2003-07-22 2005-02-24 Vega Grieshaber Kg Verfahren und Schaltungsanordnung zum Auswerten einer Messkapazität
US7365411B2 (en) * 2004-08-12 2008-04-29 Micron Technology, Inc. Resistance variable memory with temperature tolerant materials
EP1927743A1 (fr) * 2006-11-30 2008-06-04 Delphi Technologies, Inc. Détection de fautes dans un agencement d'injecteur
US7765877B2 (en) * 2007-11-30 2010-08-03 Caterpillar Inc System for preloading piezoelectric actuators and method
WO2015077410A1 (fr) * 2013-11-20 2015-05-28 Eaton Corporation Solénoïde et procédé de commande associé
EP3144512B1 (fr) * 2014-05-13 2019-07-10 Hitachi Automotive Systems, Ltd. Système d'injection de carburant pour moteur à combustion interne
FR3055991B1 (fr) * 2016-09-14 2018-09-28 Continental Automotive France Procede de detection de defaillances
WO2020151809A1 (fr) * 2019-01-22 2020-07-30 Telefonaktiebolaget Lm Ericsson (Publ) Sécurité pour réseautage distribué

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1540216A (en) * 1975-03-07 1979-02-07 Cav Ltd Controlling and monitoring the operation of fuel injection supply systems
US4608958A (en) * 1982-09-22 1986-09-02 Nippon Soken, Inc. Load reactance element driving device
DE19711903C2 (de) * 1997-03-21 1999-03-18 Siemens Ag Vorrichtung und Verfahren zum Ansteuern eines piezogesteuerten Kraftstoffeinspritzventils
DE19733560B4 (de) * 1997-08-02 2007-04-05 Robert Bosch Gmbh Verfahren und Vorrichtung zum Laden und Entladen eines piezoelektrischen Elements
DE19845042C2 (de) * 1998-09-30 2000-08-24 Siemens Ag Verfahren und Anordnung zur Diagnose eines kapazitiven Aktors
DE19910388C2 (de) * 1999-03-09 2001-03-29 Siemens Ag Verfahren zur Überprüfung eines kapazitiven Stellgliedes
DE19910389C2 (de) * 1999-03-09 2001-09-27 Dlw Ag Trägerloses Linoleum-Flächengebilde und Verfahren zu dessen Herstellung
DE19944734B4 (de) * 1999-09-17 2007-02-15 Siemens Ag Verfahren und Vorrichtung zum Laden wenigstens eines kapazitiven Stellgliedes
US6556028B1 (en) * 2001-05-07 2003-04-29 Storage Test Solutions, Inc. Method and apparatus for detecting defects in piezoelectric actuators

Also Published As

Publication number Publication date
US6853201B2 (en) 2005-02-08
US20030078744A1 (en) 2003-04-24
DE10028353C2 (de) 2003-02-20
WO2001094768A1 (fr) 2001-12-13
DE10028353A1 (de) 2001-12-20
EP1287250A1 (fr) 2003-03-05

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