EP1698777A2 - Procédé pour faire fonctionner un injecteur pour moteur à combustion interne - Google Patents

Procédé pour faire fonctionner un injecteur pour moteur à combustion interne Download PDF

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Publication number
EP1698777A2
EP1698777A2 EP06110051A EP06110051A EP1698777A2 EP 1698777 A2 EP1698777 A2 EP 1698777A2 EP 06110051 A EP06110051 A EP 06110051A EP 06110051 A EP06110051 A EP 06110051A EP 1698777 A2 EP1698777 A2 EP 1698777A2
Authority
EP
European Patent Office
Prior art keywords
actuator
internal combustion
combustion engine
injection
injector
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.)
Granted
Application number
EP06110051A
Other languages
German (de)
English (en)
Other versions
EP1698777B1 (fr
EP1698777A3 (fr
Inventor
Andreas Huber
Kai Barnickel
Stefan Schempp
Jens-Holger Barth
Matthias Bitzer
Nils Draese
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 EP1698777A2 publication Critical patent/EP1698777A2/fr
Publication of EP1698777A3 publication Critical patent/EP1698777A3/fr
Application granted granted Critical
Publication of EP1698777B1 publication Critical patent/EP1698777B1/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
    • F02D41/30—Controlling fuel injection
    • F02D41/3005—Details not otherwise provided for
    • 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
    • F02D41/22—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
    • F02D41/24—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
    • F02D41/2438—Active learning methods
    • 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
    • F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
    • F02D2400/11—After-sales modification devices designed to be used to modify an engine afterwards

Definitions

  • the invention firstly relates to a method for operating an injector for an internal combustion engine, by means of which fuel can reach a combustion chamber, in which the injector is actuated with a signal which influences the state of an actuator of the injector.
  • the invention also relates to a computer program, an electrical storage medium for a control and / or regulating device of an internal combustion engine, as well as a control and / or regulating device for an internal combustion engine.
  • a method of the type mentioned is known from the market. It is mainly used in motor vehicle internal combustion engines with direct fuel injection. In these, the fuel is injected from an injector directly into a combustion chamber associated with the injector. As an actuator for the initiation and completion of an injection, the injector has a piezoelectric actuator, which influences the switching position of a valve element, or a valve needle, by a change in length.
  • control and regulating device which also provides the drive signals for the actuators of the injectors of the internal combustion engine.
  • control and regulating device also provides the drive signals for the actuators of the injectors of the internal combustion engine.
  • control and regulating device To increase performance, more and more often the user or a workshop tries to influence the controls of the actuator of the injector by manipulation of the control and regulating device or by interposing additional control and / or regulating devices. Due to the associated additional loads of the internal combustion engine or the injectors can lead to accelerated wear and consequently to a failure of the engine. This can lead to unjustified warranty claims.
  • the object of the present invention is to develop a method of the type mentioned above so that such manipulations can be reliably detected.
  • This object is achieved in a method of the type mentioned in that outside of a scheduled injection is monitored at least temporarily, if the actuator is additionally controlled, and that depending on the result of monitoring a measure is performed.
  • At least one state variable of the actuator is detected at a time interval after a planned injection, that the detected state variable is diagnosed, and that the measure depends on the result of the diagnosis.
  • Current state variables of the actuator are reliable indicators of the control state of the actuator, which in turn allows conclusions to be drawn on the actual control and / or regulating device not planned additional controls or injections.
  • state variables come in an electric actuator, such as a piezoelectric actuator, especially an am Actuator voltage applied, a discharge time, and / or an electrical resistance of the actuator in question.
  • said time interval is variable. This increases the likelihood that additional injection following a scheduled injection will be detected. This probability is increased again if the time interval is random. This also "deception" with which the manipulations are to be obscured, made more difficult.
  • a test drive of the actuator is performed in the time interval after the injection, which causes no injection or terminates, and that the state variable is detected in connection with the test drive. This is based on the idea that when a control of the actuator by default detection operations are performed.
  • the voltage applied to the piezoactuator voltage is detected, for example, before a control, by which a change in charge of the piezoelectric actuator is effected.
  • control in a piezoelectric actuator only the actual process of the change in charge of the piezoelectric actuator is understood.
  • the detection of the state variable can of course also take place between two such activations, for example between the loading and the subsequent unloading back into an idle state.
  • driving is present not only at the beginning and end of the injection but normally during the entire injection. It is understood that the method according to the invention can be used in both cases.
  • the monitoring is performed within a working game only in such an angular or time range in which a torque can be generated by an injection.
  • the monitoring effort is reduced and at the same time manipulations are reliably detected, since these are mostly used to increase performance and therefore only those additional controls, or Einspitzache concern, through which a torque can be generated.
  • an internal combustion engine carries the reference numeral 10. Overall, it is used to drive a motor vehicle, not shown in the figure.
  • the internal combustion engine 10 comprises a plurality of combustion chambers, of which only those indicated by reference numerals 12a and 12b are shown in FIG.
  • Each combustion chamber 12a and 12b is associated with an injector 14a or 14b, which in turn comprises a piezoelectric actuator 16a or 16b.
  • the actuator 16a and 16b By the actuator 16a and 16b, the switching position of a valve element, not shown in Figure 1 of the injector 14a and 14b influenced by which ultimately the injection of fuel into the combustion chamber 12a and 12b is controlled.
  • the injectors 14a to 14b are connected to a fuel pressure accumulator 18 ("rail"), in which the fuel is stored under high pressure. The fuel is conveyed into the fuel pressure accumulator through a high-pressure delivery system 20.
  • the actuators 16 of the injectors 14 are controlled by a control and / or regulating device 22.
  • the control signals are determined in the control and regulating device 22 as a function of different input variables, for example a position of a crankshaft 24, which is detected by a sensor 26. Also, the position of an accelerator pedal, not shown, and various operating variables of the internal combustion engine 10 are taken into account in the determination of the drive signals in the control and regulating device 22.
  • a manipulation device 28 was subsequently attached, by which additional activations of the actuators 16 of the injectors 14 are generated.
  • the performance of the internal combustion engine 10 should be increased compared to the "production version".
  • additional activations of the actuators 16 however, their wear is increased, and moreover, the emission behavior of the internal combustion engine 10 is significantly deteriorated.
  • the procedure according to a method now shown in connection with FIGS. 2 and 3 is followed:
  • a normal scheduled main injection of fuel into the combustion chamber 12a is effected.
  • the corresponding control parameters for the actuator 16 a determined by the control and regulating device 22 and output to this.
  • the voltage applied to the actuator 16a is changed from a base value U 0 to a control value U 36 (initial control 36a), and at the end of the injection at time t 36_END , the charge of the actuator 16a is changed again by resetting the corresponding voltage the level U 0 is returned (final control 36b).
  • a time interval dt is determined in a block 38. This is different from working cycle to working cycle of the combustion chamber 12 a and is also determined by means of a random generator 40.
  • a test initial activation 42a of the actuator 16a is performed in block 42.
  • the actuator 16a is charged to a voltage level U 42 , which is so low that it is ensured that the test drive in block 42 no injection of fuel through the injector 14a is effected in the combustion chamber 12a.
  • the manipulation device 28 controls the actuator 16 a in such a way that after the main injection 36 an additional fuel injection MANIP is performed.
  • the beginning of this injection MANIP_INI not planned by the actual control and regulation device 22 is at the time t MANIP_INI after the beginning of the test start control 42a at the time t 42_INI , but still before the test end drive 42b.
  • the state quantity of the actuator 16a is detected as the state variable of the actuator 16a before the start of the test final control at the time t 42_END and compared with a limit value G. This is chosen so that when the voltage applied to the actuator 16 a voltage U is greater than the limit G, in any case can be assumed by a fuel injection.
  • the current voltage U of the actuator 16a at time t 42_END is significantly greater than the limit value G and is in the range of the manipulated voltage U MANIP .
  • FIGS. 2 and 3 illustrate the case in which the manipulation device 28 switches between a test initial activation 42a and a test end drive 42b wants to trigger an additional injection.
  • FIG. 4 shows the case in which the control and regulation device 22 wishes to trigger a test initial activation 42a after the manipulation device 28 has triggered an additional activation MANIP of the actuator 16a. This case would also be detected in blocks 44 and 46, since the voltage U applied to the actuator 16a is detected before the start of the test initial control 42a. It should be noted that the piezoelectric actuator 16a is already charged (namely, by the manipulation device 28), which is recognized as an error. As in the embodiment of Figure 3 can be prevented by the random arrangement of the test drives 42 that the manipulation device 28 can predict the test drives 42 and perform appropriate deceptive measures.
  • FIG. 5 shows a further variant of the method.
  • the voltage applied to the actuator 16a voltage U is detected after the main injection 36, but this does not happen in connection with a test injection, but is of a time processing unit, in the control and regulating device 22 for the termination of the control of the actuator 16a is triggered by means of a trigger at time T TRIG .
  • the trigger is at a certain time interval dt at the beginning t 36_END of the final control 36b of the main injection 36.
  • the time interval dt from injection to injection can be varied randomly by one As long as possible temporal range in which may be present triggered by the manipulation device 28 controls, and to deception by the To aggravate or prevent manipulation device 28.
  • a measure is triggered, for example, the internal combustion engine 10 is turned off or there is an entry in a fault memory.

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)
EP20060110051 2005-02-23 2006-02-16 Procédé pour faire fonctionner un injecteur pour moteur à combustion interne Not-in-force EP1698777B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510008179 DE102005008179A1 (de) 2005-02-23 2005-02-23 Verfahren zum Betreiben eines Injektors für eine Brennkraftmaschine

Publications (3)

Publication Number Publication Date
EP1698777A2 true EP1698777A2 (fr) 2006-09-06
EP1698777A3 EP1698777A3 (fr) 2010-03-17
EP1698777B1 EP1698777B1 (fr) 2011-06-29

Family

ID=36303411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060110051 Not-in-force EP1698777B1 (fr) 2005-02-23 2006-02-16 Procédé pour faire fonctionner un injecteur pour moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP1698777B1 (fr)
DE (1) DE102005008179A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2919025A1 (fr) * 2007-07-20 2009-01-23 Rene Girard Procede pour selectionner le pic de tension electrique lie a l'activation d'un injecteur de carburant dans un moteur
WO2010142488A1 (fr) * 2009-06-09 2010-12-16 Robert Bosch Gmbh Procédé de contrôle du fonctionnement d'un injecteur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008042606B4 (de) 2008-10-06 2018-08-09 Robert Bosch Gmbh Verfahren zum Betreiben eines Einspritzventils und Steuergerät

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9906558A (pt) * 1998-06-25 2000-08-15 Siemens Ag Processo e dispositivo para o comando de um atuador capacitivo
DE19931233B4 (de) * 1999-07-07 2007-02-01 Siemens Ag Verfahren zum Ansteuern eines kapazitiven Stellgliedes
DE10131573A1 (de) * 2001-07-02 2003-01-16 Bosch Gmbh Robert Verfahren zum Schutz eines Steuergeräts eines Kraftfahrzeugs vor Manipulation
DE10254844A1 (de) * 2002-11-25 2004-06-03 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betrieb eines Einspritzsystems einer Brennkraftmaschine
DE10319530B4 (de) * 2003-04-30 2007-01-25 Siemens Ag Verfahren und Vorrichtung zur Überwachung eines elektromechanischen Aktors

Non-Patent Citations (1)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2919025A1 (fr) * 2007-07-20 2009-01-23 Rene Girard Procede pour selectionner le pic de tension electrique lie a l'activation d'un injecteur de carburant dans un moteur
WO2010142488A1 (fr) * 2009-06-09 2010-12-16 Robert Bosch Gmbh Procédé de contrôle du fonctionnement d'un injecteur
CN102459855A (zh) * 2009-06-09 2012-05-16 罗伯特·博世有限公司 用于监控喷油嘴运行的方法
CN102459855B (zh) * 2009-06-09 2015-08-26 罗伯特·博世有限公司 用于监控喷油嘴运行的方法

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Publication number Publication date
EP1698777B1 (fr) 2011-06-29
EP1698777A3 (fr) 2010-03-17
DE102005008179A1 (de) 2006-08-31

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