EP1398486A2 - Procédé pour améliorer l'exactitude du modèle du conduit d'admission d'un moteur à combustion - Google Patents

Procédé pour améliorer l'exactitude du modèle du conduit d'admission d'un moteur à combustion Download PDF

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Publication number
EP1398486A2
EP1398486A2 EP03020364A EP03020364A EP1398486A2 EP 1398486 A2 EP1398486 A2 EP 1398486A2 EP 03020364 A EP03020364 A EP 03020364A EP 03020364 A EP03020364 A EP 03020364A EP 1398486 A2 EP1398486 A2 EP 1398486A2
Authority
EP
European Patent Office
Prior art keywords
lambda
value
intake manifold
determined
lambda value
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Withdrawn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
EP03020364A
Other languages
German (de)
English (en)
Other versions
EP1398486A3 (fr
Inventor
Norbert Pelz
Matthias Schultalbers
Andreas Sprysch
Holger Dr. Braun
Thomas Von Der Ohe
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP1398486A2 publication Critical patent/EP1398486A2/fr
Publication of EP1398486A3 publication Critical patent/EP1398486A3/fr
Withdrawn legal-status Critical Current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
    • F02D41/02—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
    • F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
    • F02D41/1475—Regulating the air fuel ratio at a value other than stoichiometry
    • 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
    • F02D41/182—Circuit arrangements for generating control signals by measuring intake air flow for the control of a fuel injection device
    • 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
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1433—Introducing closed-loop corrections characterised by the control or regulation method using a model or simulation of the system
    • 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
    • F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
    • 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
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0406—Intake manifold pressure
    • 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
    • F02D2200/0411—Volumetric efficiency
    • 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

Definitions

  • the invention relates to a method for operating an internal combustion engine, wherein a predicted charge is calculated from an intake manifold pressure p s by means of an intake manifold model and transferred to a mixture control that determines a fuel mass to be injected into a combustion chamber of the internal combustion engine, and a lambda value is continuously generated by means of a lambda probe of an exhaust gas is determined according to the preamble of claim 1.
  • a charge detection When operating an internal combustion engine, a charge detection has the task of determining the air mass in the combustion chamber as accurately and dynamically as possible, in order to provide a basis for the setting of manipulated variables. There is no direct measurement.
  • An intake manifold model is provided for filling detection, which calculates a filling of cylinders or a combustion chamber of the internal combustion engine from an intake manifold pressure p s .
  • the intake manifold model essentially comprises a set of formulas in the form of characteristic diagrams which establish an association between the intake manifold pressure p s and a filling of the cylinders.
  • the present invention is therefore based on the object of a method of to improve the above-mentioned type with regard to the accuracy of the intake manifold model.
  • a deviation of the lambda value from a lambda value expected for the injected fuel mass and the predicted filling is determined, that a difference between the predicted filling and a filling required to achieve the expected lambda value is determined and that parameters of the intake manifold model are changed in such a way that the intake manifold model for the input value of the suction pressure p s from which the predicted filling was previously calculated gives the previously determined required filling as an output.
  • the expected value for the lambda value is that Ratio of the relative amount of air to the relative amount of fuel resulting from the Feedforward control is determined.
  • the expected corresponds Value for the lambda value that lambda value which is from the lambda controller should be set.
  • An internal combustion engine 10 with a combustion chamber 12 with fuel injection (not shown in detail) is indicated schematically in the single FIG.
  • a predetermined fuel quantity or mass 14 is injected into the combustion chamber 12, the fuel quantity 14 being predetermined by a mixture control 16.
  • the mixture control 16 receives as input values a lambda setpoint value 18 and a predicted filling 20.
  • the filling 20 is determined by an intake manifold model 22, which comprises a parameter set in the form of characteristic maps, which assign an association between them an intake manifold pressure p s and the predicted filling 20.
  • the parameters of the intake manifold model 22 are initially fixed statically.
  • Exhaust gas 24 flows out of the combustion chamber 12 and a lambda probe 26 determines one Lambda value 28 of the exhaust gas 24.
  • the intake manifold model 22 is an adaptation 30 assigned which includes the lambda value 28 and the injected fuel mass 14 receives.
  • the adaptation 30 recognizes from the lambda value 28 whether the injected fuel is completely burned or whether the mixture is fat or lean. In controlled operation Without an active lambda controller, it is therefore possible to understand whether the calculated charge 20 correct is. Even with controlled operation, the controller output shows that whether the calculated filling is correct.
  • the method according to the invention is used to check whether an error has occurred in the Control of the internal combustion engine is actually considered an incorrect charge detection Has cause.
  • the lambda value checked again.
  • the test is carried out with an active lambda controller the combustion process is not affected. So the is always checked Controller output of the lambda controller. If this deteriorates, i.e. he moves further away from an expected value, it is recognized that no error of the Fill detection is present, but another error, for example in the Fuel injection.
  • the change of the parameters of the Intake manifold model is undone.
  • a deviation of the lambda value from a lambda value expected for the injected fuel mass and the predicted filling is determined. Then a difference between the predicted filling and a filling required to achieve the expected lambda value is determined. Thereupon, parameters of the intake manifold model are changed in such a way that the intake manifold model for the input value of the intake pressure p s from which the predicted filling was previously calculated gives the previously determined required filling as an output. If the internal combustion engine's lambda controller is inactive, the expected value for the lambda value is the ratio of the relative air quantity to the relative fuel quantity, which is determined from the pilot control.
  • the expected lambda value corresponds to the value that should be set by the lambda control.
  • the expected lambda value corresponds to the lambda target value which is given to the mixture control.
  • the measured lambda value is evaluated, taking into account the controller intervention.
  • a diagnosis is carried out using the adaptation, i.e. from the condition that the adaptation should be essentially stationary can be due to a defect or Close errors in the system if an adaptation is necessary continuously or frequently.
  • a check of the internal combustion engine in a workshop is then requested here.
  • a throttle valve that closes quickly can be a continuous one Make adaptation of the intake manifold model necessary.
  • the diagnosis recognizes through the Adaptions that follow one another relatively quickly are a fundamental error is present in the system, so that in a workshop the throttle valve on the one hand Additions free and on the other hand the cause of the addition recognized and can be eliminated.

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)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP03020364A 2002-09-10 2003-09-09 Procédé pour améliorer l'exactitude du modèle du conduit d'admission d'un moteur à combustion Withdrawn EP1398486A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10241888 2002-09-10
DE2002141888 DE10241888B4 (de) 2002-09-10 2002-09-10 Verfahren zur Verbesserung der Genauigkeit eines Saugrohrmodells einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP1398486A2 true EP1398486A2 (fr) 2004-03-17
EP1398486A3 EP1398486A3 (fr) 2006-08-02

Family

ID=31502513

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03020364A Withdrawn EP1398486A3 (fr) 2002-09-10 2003-09-09 Procédé pour améliorer l'exactitude du modèle du conduit d'admission d'un moteur à combustion

Country Status (2)

Country Link
EP (1) EP1398486A3 (fr)
DE (1) DE10241888B4 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008142065A1 (fr) * 2007-05-23 2008-11-27 Continental Automotive Gmbh Procédé et dispositif pour faire fonctionner un moteur à combustion interne
EP2053224A3 (fr) * 2007-10-24 2009-05-20 Denso Corporation Dispositif de correction de la quantité d'air d'admission
EP1757794A4 (fr) * 2004-06-15 2009-06-03 Honda Motor Co Ltd Dispositif de contrôle de moteur à combustion interne

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006010710B4 (de) * 2006-03-08 2009-03-19 Audi Ag Verfahren zur Luftmassenermittlung bei Brennkraftmaschinen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62195438A (ja) * 1986-02-21 1987-08-28 Toyota Motor Corp 内燃機関の作動状態検知装置
DE19753969B4 (de) * 1997-12-05 2008-04-10 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
DE19753873B4 (de) * 1997-12-05 2008-05-29 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
JPH11231907A (ja) * 1998-02-12 1999-08-27 Yamaha Motor Co Ltd 学習可能な制御ロジックを用いたフィードフォワード制御における予測学習方法
DE69929920D1 (de) * 1998-04-09 2006-04-27 Yamaha Motor Co Ltd Krafstoffeinspritzsteuereinheit für ein Brennkraftmaschine
DE19841836A1 (de) * 1998-09-12 2000-03-16 Volkswagen Ag Optimierung des Frischluftfüllungsverhaltens einer Brennkraftmaschine
DE10039785B4 (de) * 2000-08-16 2014-02-13 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1757794A4 (fr) * 2004-06-15 2009-06-03 Honda Motor Co Ltd Dispositif de contrôle de moteur à combustion interne
WO2008142065A1 (fr) * 2007-05-23 2008-11-27 Continental Automotive Gmbh Procédé et dispositif pour faire fonctionner un moteur à combustion interne
US8412437B2 (en) 2007-05-23 2013-04-02 Continental Automotive Gmbh Method and device for operating an internal combustion engine
EP2053224A3 (fr) * 2007-10-24 2009-05-20 Denso Corporation Dispositif de correction de la quantité d'air d'admission
US7792632B2 (en) 2007-10-24 2010-09-07 Denso Corporation Intake air quantity correcting device

Also Published As

Publication number Publication date
DE10241888A1 (de) 2004-03-11
EP1398486A3 (fr) 2006-08-02
DE10241888B4 (de) 2012-12-27

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