EP1413732B1 - Verfahren und Vorrichtung zur Steuerung der Schwarzrauchemission für Dieselmotoren - Google Patents

Verfahren und Vorrichtung zur Steuerung der Schwarzrauchemission für Dieselmotoren Download PDF

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Publication number
EP1413732B1
EP1413732B1 EP03024199A EP03024199A EP1413732B1 EP 1413732 B1 EP1413732 B1 EP 1413732B1 EP 03024199 A EP03024199 A EP 03024199A EP 03024199 A EP03024199 A EP 03024199A EP 1413732 B1 EP1413732 B1 EP 1413732B1
Authority
EP
European Patent Office
Prior art keywords
parameter
fuel
representative
determining
instantaneous
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
EP03024199A
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English (en)
French (fr)
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EP1413732A1 (de
Inventor
Juerg Spuler
Laurentius W. Jaeger
Leonardo Montali
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.)
FPT Motorenforschung AG
Original Assignee
Iveco Motorenforschung AG
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Publication date
Application filed by Iveco Motorenforschung AG filed Critical Iveco Motorenforschung AG
Publication of EP1413732A1 publication Critical patent/EP1413732A1/de
Application granted granted Critical
Publication of EP1413732B1 publication Critical patent/EP1413732B1/de
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
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3827—Common rail control systems for diesel engines
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • F02D41/1458—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with determination means using an estimation
    • 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
    • F02D41/2409—Addressing techniques specially adapted therefor
    • 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
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0402—Engine intake system parameters the parameter being determined by using a model of the engine intake or its components
    • 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
    • F02D2200/0602—Fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/32—Air-fuel ratio control in a diesel engine
    • 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
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/187—Circuit arrangements for generating control signals by measuring intake air flow using a hot wire flow sensor
    • 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

Definitions

  • the present invention relates to a method and device for controlling black smoke in a diesel engine.
  • control is suitably brought about by means of a two-dimensional (2D) retrieval array which receives two input parameters, namely:
  • Said two-dimensional retrieval array emits a signal which is indicative of the actual admissible fuel supply or of the actual admissible air-fuel ratio as a function of the real magnitude of the two input parameters.
  • the injection pressure can deviate from its given value during the transient operation of the engine. This means that the injection pressure may exhibit a delay when it is controlled at variable values within the operating range of the engine.
  • EP 1 164 274 describes a fuel injection controlling system for a diesel engine wherein a control unit determines a desired amount of fuel injection based on the amount of fresh intake air, the amount of residual air and a detected possible accelerating or decelerating operation. A feedback control is performed to regulate the fuel injection pressure, but the actual value thereof is not taken into account, when determining the desired amount of fuel injection.
  • the reference numeral 1 generally denotes an apparatus for controlling black smoke from a diesel engine 2 (shown schematically).
  • the diesel engine 2 is provided with a fuel-injection system 4 of known type, for example a common rail system, which injects fuel under pressure into combustion chambers (not shown) of the diesel engine 2.
  • a fuel-injection system 4 of known type, for example a common rail system, which injects fuel under pressure into combustion chambers (not shown) of the diesel engine 2.
  • the fuel injection system 4 is controlled by an electronic diesel control unit (EDC) 6 which receives input signals principally measured in the engine and emits control signals for the diesel engine 2.
  • EDC electronic diesel control unit
  • the electronic diesel control unit (EDC) 6 controls the quantity of fuel injected and the injection pressure of the fuel in a known manner.
  • the electronic diesel control unit (EDC) 6 also performs a control of the black smoke of the diesel engine 2 so as to limit the emission of black smoke during transition periods (for example under acceleration) of the engine 2.
  • the EDC 6 is provided with a three-dimensional array 10 (3D) which receives the following input parameters:
  • the fuel-injection pressure p can preferably be represented by the pressure present in the duct of a common rail system.
  • Said 3D array 10 for each combination of three input parameters, emits a signal F which is representative of the actual admissible fuel supply or the actual admissible air-fuel ratio which has to be provided by means of the fuel-injection system 4.
  • the signal F is thus used to control the fuel-injection system 4 so that the quantity of fuel which is supplied to the engine 2 is correlated to the injection pressure. Therefore, the irregular emission of smoke caused by variations in pressure is eliminated.
  • the electronic diesel control unit (EDC) 6 performs a control of the black smoke of the diesel engine 2 so as to limit the emissions of smoke during the transient operating period (for example under acceleration) of the engine 2.
  • the EDC 6 is provided with a two-dimensional array 12 (2D) which receives the following input parameters:
  • Said array 12 for each combination of the two input parameters, emits an approximate signal Fr which is representative, initially approximately, of the actual admissible fuel supply or of the actual admissible air-fuel ratio which should be provided by the fuel-injection system 4.
  • the approximate signal Fr is fed to a correction block 15 in which the approximate signal Fr is multiplied by a corrective gain factor G so as to emit a corrected signal Fc used to control the fuel-injection system 4 so that the quantity of fuel supplied to the engine 2 is linked to the injection pressure of the fuel.
  • the gain factor G may be emitted by way of an array 17 which emits a value G for each input value ⁇ p.
  • the gain factor G is less than 1, when the difference ⁇ p is near to 0, the gain factor G is near to 1 and if the injection pressure p is higher than the reference value p o , the gain factor is ⁇ 1.
  • the corrective gain factor G can also be linked to the instantaneous speed of the engine.
  • the array 17 may comprise a two-dimensional map (2G) with two input parameters which are representative of the engine speed and of the injection pressure of the fuel or, respectively, of the deviation in the injection pressure.
  • the present invention can be advantageously implemented through a program for computer, preferably arranged and running in the electronic diesel control unit EDC, comprising program coding means for the implementation of one or more steps of the method, when this program is running on a computer or a microprocessor system. Therefore, it is understood that the scope of protection is extended to such a program for computer and in addition to a computer readable means having a recorded message therein, said computer readable means comprising program coding means for the implementation of one or more steps of the method, when this program is run on a computer or a microprocessor system.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Claims (10)

  1. Verfahren zum Steuern der Rußemission bei einem Dieselmotor, dadurch gekennzeichnet, dass es die nachfolgenden Schritte umfasst:
    - das Bestimmen eines ersten Parameters (?), welcher repräsentativ für die momentane Motordrehzahl ist;
    - das Bestimmen eines zweiten Parameters (O2), welcher zu der aktuellen Sauerstoffmenge korreliert ist, welche in den Verbrennungskammern des Motors vorhanden ist;
    - das Bestimmen eines dritten Parameters (p; ?p), welcher zu einem momentanen Kraftstoffeinspritzdruck korreliert ist, und
    - das Erzeugen eines Signals (F; Fc), welches repräsentativ ist für die aktuell zulässige Kraftstoffzufuhr oder für das aktuell zulässige Luft-Kraftstoff-Verhältnis zur Eliminierung von irregulärer Rauchemission auf Basis von ersten, zweiten und dritten Parametern.
  2. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass der Schritt des Bestimmens des dritten Parameters den Schritt des Bestimmens des Drucks in dem Kanal (p) eines Common-Rail-Systems umfasst.
  3. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass der Schritt des Bestimmens des dritten Parameters den Schritt des Bestimmens eines Parameters umfasst, welcher repräsentativ ist für die Differenz (?p) zwischen einem momentanen Kraftstoffeinspritzdruck (p) und einem gegebenen Wert (p0).
  4. Verfahren gemäß einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Schritt des Erzeugens eines Signals (F; Fc), welches repräsentativ ist für die aktuell zulässige Kraftstoffzufuhr, den Schritt des Erzeugens von ersten, zweiten und dritten Parametern für ein dreidimensionales Datenfeld (10) umfasst, welches emittiert, für jede Kombination von den drei Eingangssignalen, das Signal (F; Fc), welches repräsentativ ist für die aktuell zulässige Kraftstoffzufuhr oder das aktuell zulässige Luft-Kraftstoff-Verhältnis.
  5. Verfahren gemäß einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Schritt des Erzeugens eines Signals (F; Fc), welches repräsentativ ist für die aktuell zulässige Kraftstoffzufuhr, den Schritt des Erzeugens von ersten und zweiten Parametern für ein zweidimensionales Datenfeld (12) umfasst, welches emittiert, für jede Kombination aus den zwei Eingangssignalen, ein angenähertes Signal (Fr), welches repräsentativ ist für die aktuell zulässige Kraftstoffzufuhr oder das aktuell zulässige Luft-Kraftstoff-Verhältnis; wobei das Verfahren weiter den Schritt des Korrigierens des angenäherten Signals (Fr) umfasst.
  6. Verfahren gemäß Anspruch 5, dadurch gekennzeichnet, dass der Korrekturschritt den Schritt des Multiplizierens der angenäherten Signale (Fr) mit einem Verstärkungsfaktor (G) umfasst, welcher zumindest von dem dritten Parameter (p; ?p) abhängig ist.
  7. Verfahren gemäß Anspruch 6, dadurch gekennzeichnet, dass der Verstärkungsfaktor (G) auf Basis des dritten Parameters (p; ?p) und der momentanen Motordrehzahl (?) bestimmt wird.
  8. Vorrichtung zum Steuern der Rußemission bei einem Dieselmotor, dadurch gekennzeichnet, dass sie Mittel zur Implementierung des Verfahrens von jedem der Ansprüche 1 bis 7 umfasst.
  9. Computerprogramm, welches einen Computerprogrammkode umfasst, welcher alle Schritte von Anspruch 1 bis 7 ausführen kann, sobald das Programm auf einem Computer oder einem Mikroprozessorsystem gestartet wird.
  10. Computerlesbares Medium mit einem darauf aufgezeichneten Programm, wobei das computerlesbare Medium einen Computerprogrammkode umfasst, welcher alle Schritte von Ansprüchen 1 bis 7 ausführen kann, sobald das Programm auf einem Computer oder einem Mikroprozessorsystem gestartet wird.
EP03024199A 2002-10-25 2003-10-21 Verfahren und Vorrichtung zur Steuerung der Schwarzrauchemission für Dieselmotoren Expired - Lifetime EP1413732B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000929A ITTO20020929A1 (it) 2002-10-25 2002-10-25 Metodo di controllo dei fumi neri per un motore diesel.
ITTO20020929 2002-10-25

Publications (2)

Publication Number Publication Date
EP1413732A1 EP1413732A1 (de) 2004-04-28
EP1413732B1 true EP1413732B1 (de) 2007-02-21

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EP03024199A Expired - Lifetime EP1413732B1 (de) 2002-10-25 2003-10-21 Verfahren und Vorrichtung zur Steuerung der Schwarzrauchemission für Dieselmotoren

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EP (1) EP1413732B1 (de)
AT (1) ATE354725T1 (de)
DE (1) DE60311934T2 (de)
ES (1) ES2282558T3 (de)
IT (1) ITTO20020929A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010055641B4 (de) * 2010-12-22 2023-05-04 Volkswagen Aktiengesellschaft Verfahren und Steuereinrichtung zur Ermittlung einer Rußbeladung eines Partikelfilters

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4841936A (en) * 1985-06-27 1989-06-27 Toyota Jidosha Kabushiki Kaisha Fuel injection control device of an internal combustion engine
JP3070334B2 (ja) * 1993-04-16 2000-07-31 トヨタ自動車株式会社 ディーゼル機関の燃料噴射制御装置
JP3864671B2 (ja) * 2000-06-12 2007-01-10 日産自動車株式会社 ディーゼルエンジンの燃料噴射制御装置

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ATE354725T1 (de) 2007-03-15
EP1413732A1 (de) 2004-04-28
ES2282558T3 (es) 2007-10-16
DE60311934D1 (de) 2007-04-05
ITTO20020929A1 (it) 2004-04-26
DE60311934T2 (de) 2007-12-06

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