EP2706216A1 - Verfahren zur Bestimmung der Eigenschaften eines Brennstoffeinspritzventils - Google Patents

Verfahren zur Bestimmung der Eigenschaften eines Brennstoffeinspritzventils Download PDF

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Publication number
EP2706216A1
EP2706216A1 EP12183485.7A EP12183485A EP2706216A1 EP 2706216 A1 EP2706216 A1 EP 2706216A1 EP 12183485 A EP12183485 A EP 12183485A EP 2706216 A1 EP2706216 A1 EP 2706216A1
Authority
EP
European Patent Office
Prior art keywords
injector
fuel
pulse width
pressure loss
rate
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.)
Withdrawn
Application number
EP12183485.7A
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English (en)
French (fr)
Inventor
Edouard Sauret
Laurent Garnier
Pascal Schickes
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.)
BorgWarner Luxembourg Automotive Systems SA
Original Assignee
Delphi Technologies Holding SARL
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 Delphi Technologies Holding SARL filed Critical Delphi Technologies Holding SARL
Priority to EP12183485.7A priority Critical patent/EP2706216A1/de
Publication of EP2706216A1 publication Critical patent/EP2706216A1/de
Withdrawn legal-status Critical Current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
    • F02D41/24—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
    • F02D41/247—Behaviour for small quantities
    • 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
    • F02D2200/0606—Fuel temperature
    • 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
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves

Definitions

  • the present invention relates to fuel injection in internal combustion engines. More specifically, the present invention relates to the determination of specific characteristics of a fuel injector in particular for the purpose of injector diagnosis and detecting injection system faults.
  • the above method is beneficial in that it allows appropriately describing the flow performance per injector and provides finer injector control, in particular in the ballistic operating range.
  • the ballistic range is a critical operating region and it has appeared that the above method may, under certain conditions, not discriminate cases where the injector does not open.
  • MDP Minimum Drive Pulse
  • the method may be performed when the fuel system is in a closed pressurised state.
  • a closed pressurised state may be achieved either by closing all the injectors within the fuel system and ceasing pumping of fuel to the intermediate tank (common rail) or by scheduling the test to run during a portion of the engine cycle when the injectors are closed and the pump is not actively charging the intermediate fuel tank.
  • the pump may conveniently be set to compensate for natural fuel leakage.
  • any other valve on the intermediate tank should also be closed.
  • the pulse width corresponding to the corner point may be set as a first injector characteristic indicative of the control valve triggering.
  • the invention further extends to a carrier medium for carrying a computer readable code for controlling an electronic control unit to carry out the above method.
  • the ECU 8 controls pumping of fuel from the tank 2 to the rail 4 by the pump 3.
  • the ECU 8 also controls the operation of the injectors 7 and receives sensor data on the pressure within the rail 4 from the pressure sensor 5.
  • a pressure corresponding to that of the fuel rail is present in the control chamber and in the nozzle; the nozzle needle is biased in closed position, i.a. by a spring.
  • Fuel injection may be achieved by applying a drive signal (above MDP) to the solenoid of the electromagnetic actuator. This will cause the armature to move and lift the control valve member off its seat. Fuel flows back to the return line. Pressure in the control chamber then falls below that in the nozzle chamber, forces on the nozzle needle are changed and the latter begins to open and fuel injection commences.
  • a drive signal above MDP
  • the present method allows determining two injector-specific characteristics:
  • point A (or A') is the first injector characteristic, i.e. the PW of the control valve take-off point.
  • Point B is the second characteristic, i.e. the PW determined as the foot of the high slope section 18 after the second plateau 16, and representing the injector MDP.
  • Fig.3 illustrates a possible embodiment of this test sequence, which is preferably carried out during a foot off phase.
  • the rate of pressure loss can thus be calculated as: ⁇ ⁇ P n * PWi , where ⁇ P is the difference of rail pressure before the first pulse and after the last one of group Gi, and n is the number of pulses applied in the group.
  • the given formula is insofar an approximation as it does not take into account the pressure loss resulting from leakage. If the leakage cannot be neglected, one has to calculate the rate of pressure loss as ⁇ ⁇ P - ⁇ ⁇ P L n * PWi , where ⁇ P L represents the pressure loss due to underlying leakage over the duration of the group of pulses G i .
  • the unitary drive time (i.e. the starting pulse width) is defined as the last take-off drive pulse minus an Offset. This is done to ensure that the PW sweeping process is initiated at a sufficiently low PW, below that of the take-off point of interest.
  • the last take-off drive pulse may e.g. be known from previous measurements, or from the injector installation where this take-off point may be installed in the ECU with the injector codes.
  • the starting PW can be calculated as an offset with respect to a MDP value determined by any appropriate method.
  • the system waits for a foot-off phase.
  • the rail pressure is controlled to reach a predetermined start pressure, and the rail is closed (steps 120 and 130).
  • Such rail closing may be achieved by either by closing all the injectors within the fuel system and ceasing pumping of fuel to the source.
  • the test may be run during a portion of the engine cycle when the injectors are closed and the pump is not actively charging the fuel source.
  • the pump may conveniently be set to compensate for natural fuel leakage.
  • the control valve take-off point and/or the injector MDP can then be determined from the gathered test data.
  • the whole test procedure may be carried out for different predefined pressures P init .
  • the start and stop values of the test sequence are set to encompass the two characteristics of interest.
  • the start and stop values can be preset or adjusted based on more specific data, e.g. from data transferred to the ECU at injector installation (e.g. pre-defined MDP value and/or take-off point).
  • the sweeping rate of the pulse width during the test of Fig.6 i.e. the amplitude of the PW increment, may be finer or coarser, depending on the desired accurarcy.
EP12183485.7A 2012-09-07 2012-09-07 Verfahren zur Bestimmung der Eigenschaften eines Brennstoffeinspritzventils Withdrawn EP2706216A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12183485.7A EP2706216A1 (de) 2012-09-07 2012-09-07 Verfahren zur Bestimmung der Eigenschaften eines Brennstoffeinspritzventils

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12183485.7A EP2706216A1 (de) 2012-09-07 2012-09-07 Verfahren zur Bestimmung der Eigenschaften eines Brennstoffeinspritzventils

Publications (1)

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EP2706216A1 true EP2706216A1 (de) 2014-03-12

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EP12183485.7A Withdrawn EP2706216A1 (de) 2012-09-07 2012-09-07 Verfahren zur Bestimmung der Eigenschaften eines Brennstoffeinspritzventils

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015210230A1 (de) * 2015-06-03 2016-12-08 Continental Automotive Gmbh Verfahren und Vorrichtung zum Kalibrieren eines Common-Rail-Injektors
EP3121425A1 (de) * 2015-07-24 2017-01-25 Winterthur Gas & Diesel AG Verfahren und vorrichtung zur untersuchung einer elektronisch gesteuerten einspritzvorrichtung zum einspritzen eines kraftstoffs in einen zylinder eines verbrennungsmotors
CN108026856A (zh) * 2015-09-15 2018-05-11 罗伯特·博世有限公司 用于运行喷射设备的方法
RU2701430C2 (ru) * 2014-09-18 2019-09-26 Форд Глобал Текнолоджиз, Ллк Способ определения характеристики работы топливной форсунки
WO2021058248A1 (de) * 2019-09-23 2021-04-01 Vitesco Technologies GmbH Verfahren und vorrichtung zum betreiben eines verbrennungsmotors mit durchführung einer kraftstoffeinspritzmengenkorrektur durch korrelation einer kraftstoffdruckänderung
CN112780431A (zh) * 2019-11-05 2021-05-11 通用汽车环球科技运作有限责任公司 用于获悉喷射器补偿的系统和方法
DE102014224695B4 (de) 2013-12-05 2023-03-09 Ford Global Technologies, Llc Verfahren zum diagnostizieren der einspritzdüsenvariabilität in einem system mit mehreren einspritzdüsen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7136743B2 (en) 2000-11-28 2006-11-14 Brp Us Inc. Method and apparatus for identifying parameters of an engine component for assembly and programming
EP1854987A2 (de) * 2006-05-11 2007-11-14 Scania CV AB (PUBL) Verfahren zur Abgleichung eines Berechnungsmodells oder einer Nachschlagetabelle und System zur Steuerung eines Zylinderinjektors in einem Verbrennungsmotor
EP2031225A2 (de) * 2007-08-31 2009-03-04 Denso Corporation Kraftstoffeinspritzvorrichtung und Kraftstoffeinspritzsystem
EP2336534A1 (de) * 2009-12-18 2011-06-22 Delphi Technologies, Inc. Verfahren und System zur injektorindividiuellen Anpassung der Einspritzzeit von Kraftfahrzeugen
EP2453123A1 (de) * 2010-11-10 2012-05-16 Magneti Marelli S.p.A. Verfahren zur Bestimmung des Injektionsgesetzes eines Kraftstoffinjektors
EP2453124A1 (de) * 2010-11-16 2012-05-16 Delphi Technologies Holding S.à.r.l. Verfahren zur Bestimmung der Einspritzparameter eines Injektors

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7136743B2 (en) 2000-11-28 2006-11-14 Brp Us Inc. Method and apparatus for identifying parameters of an engine component for assembly and programming
EP1854987A2 (de) * 2006-05-11 2007-11-14 Scania CV AB (PUBL) Verfahren zur Abgleichung eines Berechnungsmodells oder einer Nachschlagetabelle und System zur Steuerung eines Zylinderinjektors in einem Verbrennungsmotor
EP2031225A2 (de) * 2007-08-31 2009-03-04 Denso Corporation Kraftstoffeinspritzvorrichtung und Kraftstoffeinspritzsystem
EP2336534A1 (de) * 2009-12-18 2011-06-22 Delphi Technologies, Inc. Verfahren und System zur injektorindividiuellen Anpassung der Einspritzzeit von Kraftfahrzeugen
WO2011073147A1 (en) 2009-12-18 2011-06-23 Delphi Technologies, Inc. Method and system for installation of fuel injectors specific parameters
EP2453123A1 (de) * 2010-11-10 2012-05-16 Magneti Marelli S.p.A. Verfahren zur Bestimmung des Injektionsgesetzes eines Kraftstoffinjektors
EP2453124A1 (de) * 2010-11-16 2012-05-16 Delphi Technologies Holding S.à.r.l. Verfahren zur Bestimmung der Einspritzparameter eines Injektors

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014224695B4 (de) 2013-12-05 2023-03-09 Ford Global Technologies, Llc Verfahren zum diagnostizieren der einspritzdüsenvariabilität in einem system mit mehreren einspritzdüsen
RU2701430C2 (ru) * 2014-09-18 2019-09-26 Форд Глобал Текнолоджиз, Ллк Способ определения характеристики работы топливной форсунки
DE102015210230A1 (de) * 2015-06-03 2016-12-08 Continental Automotive Gmbh Verfahren und Vorrichtung zum Kalibrieren eines Common-Rail-Injektors
EP3121425A1 (de) * 2015-07-24 2017-01-25 Winterthur Gas & Diesel AG Verfahren und vorrichtung zur untersuchung einer elektronisch gesteuerten einspritzvorrichtung zum einspritzen eines kraftstoffs in einen zylinder eines verbrennungsmotors
CN108026856A (zh) * 2015-09-15 2018-05-11 罗伯特·博世有限公司 用于运行喷射设备的方法
WO2021058248A1 (de) * 2019-09-23 2021-04-01 Vitesco Technologies GmbH Verfahren und vorrichtung zum betreiben eines verbrennungsmotors mit durchführung einer kraftstoffeinspritzmengenkorrektur durch korrelation einer kraftstoffdruckänderung
US11754015B2 (en) 2019-09-23 2023-09-12 Vitesco Technologies GmbH Method and device for operating an internal combustion engine and carrying out a correction of the fuel injection quantity by correlation of a fuel pressure change
CN112780431A (zh) * 2019-11-05 2021-05-11 通用汽车环球科技运作有限责任公司 用于获悉喷射器补偿的系统和方法

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