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EP1745203B1 - Procede de diagnostic d'un circuit de commande - Google Patents

Procede de diagnostic d'un circuit de commande Download PDF

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Publication number
EP1745203B1
EP1745203B1 EP05729778A EP05729778A EP1745203B1 EP 1745203 B1 EP1745203 B1 EP 1745203B1 EP 05729778 A EP05729778 A EP 05729778A EP 05729778 A EP05729778 A EP 05729778A EP 1745203 B1 EP1745203 B1 EP 1745203B1
Authority
EP
European Patent Office
Prior art keywords
drive circuit
hsl
short
circuit
checked
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.)
Ceased
Application number
EP05729778A
Other languages
German (de)
English (en)
Other versions
EP1745203A1 (fr
Inventor
Bernd Kudicke
Thoralf Rosahl
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 EP1745203A1 publication Critical patent/EP1745203A1/fr
Application granted granted Critical
Publication of EP1745203B1 publication Critical patent/EP1745203B1/fr
Ceased 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
    • 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
    • F02D41/22—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
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2051—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using voltage control
    • 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
    • F02D2041/2086—Output circuits, e.g. for controlling currents in command coils with means for detecting circuit failures
    • F02D2041/2093—Output circuits, e.g. for controlling currents in command coils with means for detecting circuit failures detecting short circuits
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting

Definitions

  • the invention is based on a method for the diagnosis of drive circuits with at least one actuator, in particular a capacitive actuator of a fuel injection device, according to the preamble of the independent claim.
  • the present invention also relates to a device for driving drive circuits, in particular a control device of an internal combustion engine, and a computer program product for carrying out the method according to the invention on a computer or control device.
  • Such actuators operated capacitively or inductively, are used in fuel injection devices of internal combustion engines, in particular in those with direct fuel injection.
  • piezo actuators as capacitive actuators a valve element of the fuel injection device is moved from an open to a closed position and vice versa by a change in length of the piezoelectric actuator.
  • a proper control of the piezoelectric actuator is no longer possible.
  • a plurality of piezoelectric actuators is impaired in their function. In the best case this can lead to a loss of comfort, in an unfavorable case to a deterioration of the fuel consumption and the emission behavior of the engine Internal combustion engine, and in extreme cases lead to a risk to the user of the internal combustion engine.
  • the inventive method with the features of the independent claim has the advantage that before each operation of a respective drive circuit for driving at least one actuator, this drive circuit and the at least one actuator is checked for short circuits, and that occurs in the presence of a short circuit, an error response.
  • This has the particular advantage that before each operation of the Control circuit is ensured that the respectively driven drive circuit is without a short circuit.
  • the drive circuit in which a short circuit has been detected is blocked as a fault reaction.
  • this procedure and in particular a rapid error reaction after detection of a short circuit, it is advantageously possible to dispense with a continuous short circuit strength of the drive output stage.
  • it is sufficient to build the output stage, although short-circuit-proof but not necessarily permanently short circuit-proof and thus makes it possible to cost-effective components or To use mechanical components.
  • the dissipated power loss is reduced.
  • a device for driving control circuit which have at least one actuator, is provided, wherein the device is designed for example as a control unit of an internal combustion engine and is programmed to use at least one inventive method.
  • the diagnosis for short circuit can be taken over centrally by a control device and, for example, in addition to the fault realizations, further measures can be initiated.
  • the invention is based on the consideration that an output stage for the control of actuators does not necessarily have to be permanently short-circuit-proof if it is ensured that the output stage does not drive a control circuit with a permanent short circuit. According to the invention, it is now provided to check the respective drive circuit and the actuators themselves for a short circuit before operating an actuator. If a short circuit is detected, preferably the respective drive circuit for further operation, in particular an output stage control, is disabled.
  • actuators that are intended for operation in a Brennläftmaschine summarized into groups in a common drive circuit. These groups of actuators are commonly referred to as a bank or as a bank system for a six-cylinder internal combustion engine, for example, three bank systems can be provided with two actuators.
  • FIG. 1 schematically shows a drive circuit for two capacitive actuators.
  • First and second actuators are in FIG. 1 marked with actuator 1 and actuator 2.
  • Both actuators are each connected to a connection on the so-called high side via a common supply line with a throttle, wherein the inductor either via a high-side switching element HSL on a supply line or a low-side switching element LSE on a ground line can be switched.
  • the electrical connection of the actuators (actuator 1, 2) via the common feed line, the throttle and the high-side switching element to the supply line is also referred to as a high-side power stage path.
  • the so-called Lowside the connection of the first actuator actuator 1 with a first lowside switching element GLS1 and the connection of the second actuator actuator 2 is connected to a second lowside switching element GLS2 wherein the two switching elements GLS1, GLS2, the two actuators actuator 1, 2 switch to a common Lowside supply line.
  • the common low-side supply line is connected to the ground line via a measuring resistor R meas.
  • the electrical path from the connection of a respective actuator actuator 1, 2 via the associated Lowside switching element GLS1,2, the Lowside supply line and the measuring resistor R measurement to the ground line is also referred to as Lowside Endworknpfad 1, 2
  • a bridging switching element GSTOP is provided, which connects the high side of the actuators via a shunt resistor Rshunt with the lowside supply line. All switches and switching elements are in the embodiment of FIG. 3 open.
  • the voltage drop across the actuators is referred to as the so-called bank voltage UBANK.
  • the voltage drop across the measuring resistor Rmess is proportional to the piezoelectric current IPIEZO.
  • the bypass switching element is opened and then the high-side switching element HSL closed after a waiting time T_TRDLY. If the bank voltage UBANK reaches or exceeds an operating threshold value U_HSL after a pre-test time T_HSL, starting from closed high-side switching element HSL, it can be assumed that there is no short circuit in the drive circuit and the drive circuit is enabled and changes to the usual operating mode.
  • the check of the bank voltage UBANK at the start of operation of the drive circuit serves as a kind of pre-test S0 for a short circuit in the drive circuit to be operated.
  • the first step S1 of the incoming short circuit check is initiated, wherein the highside switching element HSL remains closed and an additional waiting time T_TRDLY follows directly on the pretest time T_HSL of the pretest SO. If the bank voltage UBANK remains below a minimum threshold value ULOW in this additional waiting time T_TRDLY, then there is a "short to ground on highside output stage path" KSMHS and an error reaction is initiated. Without initiating an error reaction, the high-side shadow element HSL is opened again at the end of the waiting time T_TDRLY and the bypass switching element GSTOP is closed after a further subsequent waiting time T_TRDLY.
  • a diagnostic waiting time T_DIAGKSUB follows. Since the high side switching element HSL is open during this time, no current should flow from the high side via the bypass switching element GSTOP, the shunt resistor Rshunt and the measuring resistor Rmess. However, if the piezoelectric current IPIEZO measured across the measuring resistor Rmess exceeds a current threshold IPSEL, a so-called "short circuit to Ubat (battery or supply voltage) on the high-side output stage path" KSUBHS is detected and an error reaction is initiated. Without an error reaction, the bypass switching element GSTOP is opened at the end of the diagnostic waiting time T_DIAGKSUB.
  • a third step S3 the first low-side switching element GLS1 is closed for a time T_IPSEL. If the current threshold IPSEL is exceeded during this time T_IPSEL, there is a so-called “short circuit against Ubat (battery or supply voltage) on the low-side power stage path 1" KSUBLS1 and an error reaction is initiated.
  • Ubat battery or supply voltage
  • step S4 the first low-side switching element GLS1 is opened again and second low-side switching element GLS2 is closed.
  • Analogous to The third step S3 is a "short circuit against Ubat (battery or supply voltage) on the low-side power amplifier stage 2" KSUBLS2 before when the piezoelectric current IPIEZO the current threshold exceeds IPES.
  • the high-side switching element HSL is closed in addition to the second low-side switching element GLS2. If the piezoelectric current exceeds IPIEZO after a Piezc drive time T_PIEZO not the current threshold IPSEL, so there is a so-called "short circuit to ground on the low-side power amplifier path 2" KSMLS2 and an error reaction is initiated.
  • bypass switching element GSTOP is closed in a sixth step S6, and the second low-side switching element GLS2 and the high-side switching element HSL are opened.
  • a seventh step S7 starts and the bypass switching element GSTOP is opened again.
  • the first low-side switching element GLSI and the high-side switching element HSL are closed for a piezo drive time T PIEZO. If the piezoelectric current does not exceed the current threshold value IPSEL after a piezo activation time T_PIEZO, then there is a so-called "short circuit to ground on the low-side output stage path 1" KSMLS1 and an error reaction is initiated.
  • Step S0 essentially corresponds to a preliminary test in which it is decided on the basis of a test criterion whether or not the drive circuit to be operated has a short circuit. Only if the result of the pretest indicates a short circuit in the drive circuit, the further method steps S1 to S7 are performed. In steps S1 to S5 and S7 is then determined by specific settings of the switching elements and corresponding introabw both a present short circuit and determines the exact location of the fault.
  • a renewed load on the output stage by a short circuit is thus avoided in an advantageous manner. It is therefore sufficient to design the output stage in such a way that short-circuiting short circuits are withstood. Additional reserves and generous dimensioning of the components or mechanical components in order to maintain a permanent short-circuit strength are not necessary. In particular, more cost-effective components or mechanical components in the output stage can be used by this procedure, and the output stage can also be made more compact, which additionally reduces the dissipated power dissipation.

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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)
  • Dc-Dc Converters (AREA)

Abstract

L'invention concerne un procédé de diagnostic de circuits de commande comprenant au moins un actionneur, notamment un dispositif d'injection de carburant. Avant le fonctionnement d'un circuit de commande respectif, on vérifie les courts-circuits de ce circuit de commande et de l'actionneur ou des actionneurs. La présence d'un court-circuit entraîne une réaction d'erreur.

Claims (5)

  1. Procédé de diagnostic de circuits de commande comportant au moins un organe d'actionnement, notamment un dispositif d'injection de carburant, selon lequel,
    avant de faire fonctionner un circuit de commande respectif, on vérifie ce circuit de commande et au moins l'organe d'actionnement vis-à-vis des courts-circuits et
    en cas de court-circuit il y a une réaction de défaut,
    caractérisé en ce qu'
    on vérifie le chemin de l'étage de puissance côté haut du circuit de commande vis-à-vis des courts-circuits par rapport à la masse et la batterie,
    dans un chemin d'étage de puissance côté bas du circuit de commande, on vérifie chaque organe d'actionnement séparé vis-à-vis des courts-circuits par rapport à la masse et à la batterie,
    et avant de vérifier les courts-circuits du circuit de commande respectif, on ferme tout d'abord un élément de commutation côté haut HSL, puis on vérifie si une tension de banc (UBANK) dépasse un seuil de fonctionnement (U-HSL) après un temps de prétest (T-HSL) et on vérifie le circuit de commande vis-à-vis des courts-circuits seulement si la tension de banc (UBANK) ne dépasse le seuil de tension de fonctionnement (U-HSL) après le temps de prétest (T-HSL).
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    pour vérifier un court-circuit vis-à-vis de la masse, on ferme tout d'abord un élément de commutation côté haut (HSL) dans le circuit de commande respectif du chemin de l'étage de puissance côté haut et
    ensuite on vérifie si après le temps de prétest (T-HSL), et un temps d'attente supplémentaire (T-TRDLY), la tension de banc (UBANK) a dépassé une valeur de seuil minimale (ULOW) et
    en cas de non dépassement de la valeur de seuil minimale (ULOW), on produit une réaction de défaut.
  3. Procédé selon au moins l'une des revendications précédentes,
    caractérisé en ce que
    comme réaction de défaut on bloque le circuit de commande pour lequel un court-circuit a été constaté.
  4. Dispositif de commande de circuit de commande comportant au moins un organe d'actionnement, notamment un appareil de commande d'un moteur à combustion interne comportant des moyens pour déceler les courts-circuits,
    caractérisé par
    des moyens pour exécuter toutes les étapes du procédé selon l'une des revendications 1 à 3.
  5. Produit-programme d'ordinateur comportant un code programme enregistré en mémoire sur un support que peut lire une machine, pour exécuter toutes les étapes du procédé selon l'une des revendications 1 à 3 sur un appareil de commande ou un ordinateur exécutant le programme.
EP05729778A 2004-04-30 2005-04-05 Procede de diagnostic d'un circuit de commande Ceased EP1745203B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004021377A DE102004021377A1 (de) 2004-04-30 2004-04-30 Verfahren zur Diagnose einer Ansteuerschaltung
PCT/EP2005/051519 WO2005106227A1 (fr) 2004-04-30 2005-04-05 Procede de diagnostic d'un circuit de commande

Publications (2)

Publication Number Publication Date
EP1745203A1 EP1745203A1 (fr) 2007-01-24
EP1745203B1 true EP1745203B1 (fr) 2008-05-28

Family

ID=34962877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05729778A Ceased EP1745203B1 (fr) 2004-04-30 2005-04-05 Procede de diagnostic d'un circuit de commande

Country Status (5)

Country Link
US (1) US20080278876A1 (fr)
EP (1) EP1745203B1 (fr)
JP (1) JP2007534883A (fr)
DE (2) DE102004021377A1 (fr)
WO (1) WO2005106227A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2428670B1 (fr) * 2006-04-03 2021-06-09 Delphi Technologies IP Limited Circuit de commande pour un arrangement d'injecteurs
GB0610226D0 (en) * 2006-05-23 2006-07-05 Delphi Tech Inc Drive circuit for an injector arrangement and a diagnostic method
DE102006055341B3 (de) 2006-11-23 2008-03-13 Siemens Ag Verfahren zur Lokalisierung eines Fehlerorts innerhalb eines Kraftstoffeinspritzsystems
EP1927743A1 (fr) 2006-11-30 2008-06-04 Delphi Technologies, Inc. Détection de fautes dans un agencement d'injecteur
DE102007000854B4 (de) * 2006-12-25 2009-10-29 DENSO CORPORATION, Kariya-shi Lastantriebsvorrichtung
ATE531919T1 (de) * 2007-06-22 2011-11-15 Delphi Tech Holding Sarl Fehlerdetektion in einer injektoranordnung
JP4933396B2 (ja) * 2007-10-15 2012-05-16 ボッシュ株式会社 バッテリ電圧ショート検出診断方法及び車両動作制御装置
EP2058496B1 (fr) 2007-11-09 2011-01-12 Delphi Technologies Holding S.à.r.l. Détection de défauts dans un ensemble d'injecteurs
IT1397824B1 (it) * 2010-01-26 2013-02-04 Magneti Marelli Spa Metodo e sistema di diagnosi di un circuito di pilotaggio di almeno una valvola elettromeccanica di un motore a combustione interna

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4771755A (en) * 1986-01-22 1988-09-20 Honda Giken Kogyo K.K. Abnormality detecting method for air-fuel ratio control system for internal combustion engines
DE4012109C2 (de) * 1990-04-14 1999-06-10 Bosch Gmbh Robert Vorrichtung zur Funktionsüberwachung eines elektrischen/elektronischen Schaltmittels, seines angeschlossenen Verbrauchers, einer Ansteuerung und seiner Verbindungsleitung
DE60031092D1 (de) * 2000-04-01 2006-11-16 Bosch Gmbh Robert Kraftstoffeinspritzsystem
DE10033196A1 (de) * 2000-07-07 2002-01-17 Bosch Gmbh Robert Verfahren bzw. Vorrichtungzur Erkennung eines Fehlerstromes an einem piezoelektrischen Aktor eines Einspritzventils oder an dessen Hochspannung führende Zuleitung
DE10256456A1 (de) * 2002-12-03 2004-07-15 Siemens Ag Überwachungsverfahren für einen Aktor und zugehörige Treiberschaltung

Also Published As

Publication number Publication date
EP1745203A1 (fr) 2007-01-24
US20080278876A1 (en) 2008-11-13
DE102004021377A1 (de) 2005-11-17
WO2005106227A1 (fr) 2005-11-10
DE502005004283D1 (de) 2008-07-10
JP2007534883A (ja) 2007-11-29

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