EP1595065A1 - Procede de commande d'un moteur a combustion faisant intervenir une regulation lambda - Google Patents

Procede de commande d'un moteur a combustion faisant intervenir une regulation lambda

Info

Publication number
EP1595065A1
EP1595065A1 EP04702331A EP04702331A EP1595065A1 EP 1595065 A1 EP1595065 A1 EP 1595065A1 EP 04702331 A EP04702331 A EP 04702331A EP 04702331 A EP04702331 A EP 04702331A EP 1595065 A1 EP1595065 A1 EP 1595065A1
Authority
EP
European Patent Office
Prior art keywords
internal combustion
combustion engine
adaptation
adaptation value
lambda
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
EP04702331A
Other languages
German (de)
English (en)
Other versions
EP1595065B1 (fr
Inventor
Alexander Ketterer
Hong Zhang
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.)
Continental Automotive GmbH
Original Assignee
Siemens AG
VDO Automotive 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 Siemens AG, VDO Automotive AG filed Critical Siemens AG
Publication of EP1595065A1 publication Critical patent/EP1595065A1/fr
Application granted granted Critical
Publication of EP1595065B1 publication Critical patent/EP1595065B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • F02D41/1486—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor with correction for particular operating conditions
    • 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
    • F02D41/068—Introducing corrections for particular operating conditions for engine starting or warming up for warming-up
    • 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
    • F02D41/2454—Learning of the air-fuel ratio 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
    • F02D41/24—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
    • F02D41/2441—Methods of calibrating or learning characterised by the learning conditions

Definitions

  • the present invention relates to a method for controlling an internal combustion engine with a lambda control.
  • the interaction of component-specific tolerances of the system components leads to deviations in the mixture pilot control.
  • the system tolerance After activation of the mixture control by the lambda control and by the mixture control when the internal combustion engine is warm, the system tolerance is minimized and subsequently only makes a very small contribution to the emission behavior of the internal combustion engine.
  • the system tolerances only have a direct effect on the emission behavior of the internal combustion engine immediately after the internal combustion engine is started.
  • the invention has for its object to provide a method for controlling an internal combustion engine with a lambda control, which lowers the exhaust gas emission by simple means before the lambda control is used.
  • the object is achieved by a method having the features from claim 1.
  • Advantageous embodiments of the method form the subject of the subclaims.
  • a check is made in a first phase after the start of the internal combustion engine to determine whether there are predetermined activation conditions. If these activation conditions are present, an adaptation value for determining the fuel mixture as a function of the measured temperature for the internal combustion engine is determined via a characteristic curve. The method is based on the knowledge that, depending on the starting temperature of the internal combustion engine, the mixture pre-control leads to deviations of the combustion lambda of different degrees and thus to poorer emission values than in the case of a reference system.
  • an adaptation value is used to determine the fuel mixture, which takes into account the temperature of the internal combustion engine when starting. The activation conditions ensure that a
  • the fuel quantity is only adapted if the requirements are met. For example, this prevents the fuel quantity from being adapted during a warm start.
  • an activation condition is that the internal combustion engine is cold started and the internal combustion engine is idling located. It has been found that it is precisely for this activation condition that adaptation values can be determined particularly reliably from the controller parameters of the lambda controller. In this case, it is expedient to ensure that the controller parameters have assumed a stable value.
  • the adaptation value can also be calculated from the controller parameters if they have settled and / or the lambda control is operated for more than a predetermined period of time. It has been found that a short period of time, for example 10-20 seconds after the cold start and before the first start-up, is sufficient to reliably determine the adaptation values from the controller parameters of the lambda controller.
  • the adaptation value is preferably determined from an integral part of the lambda controller.
  • the pilot control can be corrected with the integral component if necessary.
  • the integral component is therefore particularly suitable for determining the adaptation value before the lambda control is started.
  • the characteristic curve is adapted and compared with the adaptation values previously taken into account in the characteristic curve. Appropriately chosen calculation methods ensure that an adaptation value so far from the characteristic curve leads directly to a strong change in the characteristic curve.
  • the adaptation value is preferably weighted by the number of firing cycles that have elapsed after the start. This weighting takes into account the fact that the adaptation value is suitable for cold internal combustion engine conditions and is weighted increasingly weaker with increasing combustion cycles and thus increasing warming of the internal combustion engine.
  • a first step 10 after starting the internal combustion engine, it is checked whether the activation conditions (A) exist.
  • A activation condition
  • the internal combustion engine is idling and whether there is a cold start.
  • the method therefore begins in an idling phase, which follows the start when the internal combustion engine is not at operating temperature. In this state of the internal combustion engine, the lambda probes are not yet ready for operation, so that the air / fuel mixture cannot yet be regulated.
  • an adaptation value is determined from a characteristic curve.
  • the temperature of the internal combustion engine is measured in step 12 and the corresponding adaptation value is read out from the characteristic curve plotted against the temperature.
  • the adaptation value indicates how the injected fuel quantity is to be adapted to the operating temperature.
  • a basic value for a fuel quantity can be specified, which is increased or decreased by the adaptation value depending on the operating temperature of the internal combustion engine.
  • the adaptation value is weighted in step 14.
  • Weighting can be provided, for example, that the adaptation value initially comes in with the weight 1 and is only evaluated with the weight 0.2 after, for example, 800 combustion cycles.
  • step 16 the fuel quantity is calculated and injected in accordance with the adaptation value.
  • a second phase of the exemplary embodiment it is checked whether the adaptation conditions (B) are present.
  • the characteristic curve is adapted to the specific characteristics of the internal combustion engine.
  • an adaptation Condition is checked whether the internal combustion engine continues to be operated at idle when the lambda control is used.
  • a mixture adaptation value is determined from the I component of the lambda controller using low-pass filtering.
  • New adaptation value means that an adaptation value suitable for adapting the characteristic curve was calculated in step 20. It is also determined whether the I component of the lambda controller has already stabilized sufficiently to be able to reliably determine the adaptation value from it. If this is not the case, the method is ended without the characteristic curve having been adapted.
  • step 22 If it is determined in step 22 that there is a new adaptation value, this is subsequently stored in the characteristic curve.
  • Known interpolation or extrapolation methods are preferably used here in order to reliably obtain a characteristic curve from the determined adaptation values.
  • step 26 After the characteristic curve has been adjusted, the method according to the invention ends in step 26.
  • the previously determined adaptation value is initialized with the stored value immediately after the transition from idle to start and included in the mixture pre-control.
  • the adaptation value is converted into a fuel injection quantity, there is also a weighting over the combustion cycles that have expired up to this moment, since the influence of an inaccurate injection quantity on the mixture deviation does not take place linearly with the running time after a cold start.
  • the compensation of the mixture deviation that takes place in this way is taken into account as long as the activation conditions are fulfilled or the method changes to the adaptation phase. This ensures that the system behavior changes over the life of the components and does not lead to a deterioration in the emission values.
  • the initialization value from the adaptation map is used.
  • the adaptation values can also be reinitialized, for example, after a repair or the replacement of a component.
  • adaptation values are also a measure of the effectiveness of the heating measures on the catalyst. Significant deviations in the adaptation values can thus also be used for diagnosing the cold start strategy and for heating up the catalyst.

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)

Abstract

L'objectif du procédé selon l'invention est d'améliorer les valeurs d'émission d'un moteur à combustion après un démarrage à froid dans la phase de marche à vide. A cet effet, une valeur d'adaptation permettant de définir la quantité de carburant nécessaire est déterminée en fonction de la température du moteur à combustion d'après une courbe caractéristique. Le procédé selon l'invention consiste ensuite à contrôler, au cours de la régulation lambda, si des conditions d'adaptation prédéterminées sont présentes. Si tel est le cas, une valeur d'adaptation est déterminée à partir des paramètres du régulateur lambda et la courbe caractéristique est adaptée en fonction de la nouvelle valeur d'adaptation et de la mesure de température du moteur à combustion.
EP04702331A 2003-02-19 2004-01-15 Procede de commande d'un moteur a combustion faisant intervenir une regulation lambda Expired - Fee Related EP1595065B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10307004 2003-02-19
DE10307004A DE10307004B3 (de) 2003-02-19 2003-02-19 Verfahren zur Steuerung einer Brennkraftmaschine mit einer Lambda-Regelung
PCT/EP2004/000269 WO2004074663A1 (fr) 2003-02-19 2004-01-15 Procede de commande d'un moteur a combustion faisant intervenir une regulation lambda

Publications (2)

Publication Number Publication Date
EP1595065A1 true EP1595065A1 (fr) 2005-11-16
EP1595065B1 EP1595065B1 (fr) 2008-04-09

Family

ID=32668108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04702331A Expired - Fee Related EP1595065B1 (fr) 2003-02-19 2004-01-15 Procede de commande d'un moteur a combustion faisant intervenir une regulation lambda

Country Status (4)

Country Link
US (1) US7191771B2 (fr)
EP (1) EP1595065B1 (fr)
DE (2) DE10307004B3 (fr)
WO (1) WO2004074663A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005006490B4 (de) * 2005-02-12 2008-07-17 Audi Ag Verfahren zum Betreiben einer Brennkraftmaschine eines Fahrzeuges, insbesondere eines Kraftfahrzeuges
JP2007100575A (ja) * 2005-10-04 2007-04-19 Toyota Motor Corp 内燃機関の制御装置
DE102006006552B8 (de) 2006-02-13 2007-06-06 Siemens Ag Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
DE102007002260A1 (de) 2007-01-16 2008-07-31 Sanofi-Aventis Verwendung von substituierten Pyranonsäurederivaten zur Herstellung von Medikamenten zur Behandlung des Metabolischen Syndroms
DE102007042406B4 (de) * 2007-09-06 2023-07-27 Robert Bosch Gmbh Verfahren zur Berücksichtigung der Ausgasung von Kraftstoff aus dem Motoröl einer Brennkraftmaschine
DE102008009033B3 (de) 2008-02-14 2009-04-23 Audi Ag Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
DE102008009034B3 (de) 2008-02-14 2009-04-23 Audi Ag Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
DE102012003919A1 (de) * 2012-02-28 2013-08-29 Gm Global Technology Operations, Llc Verfahren und Regelsystem zum Regeln einer Kraftstoffzufuhr in einem Verbrennungsmotor
DE102014209174A1 (de) 2014-05-15 2015-11-19 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung eines Luft-Kraftstoff-Gemischs zum Betrieb einer Brennkraftmaschine
DE102018218020A1 (de) * 2018-10-22 2020-04-23 Ford Global Technologies, Llc Verfahren zum Regeln einer Einspritzung durch eine Kraftstoffeinspritzeinheit, Regelvorrichtung und Computerprogramm

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US4964271A (en) 1987-03-06 1990-10-23 Toyota Jidosha Kabushiki Kaisha Air-fuel ratio feedback control system including at least downstream-side air-fuel ratio sensor
ES2046796T3 (es) * 1989-10-05 1994-02-01 Siemens Aktiengesellschaft Procedimiento para el funcionamiento de un motor de combustion interna.
JP3035390B2 (ja) 1991-08-30 2000-04-24 本田技研工業株式会社 内燃エンジンの空燃比制御装置
DE4236008C2 (de) * 1992-10-24 2002-03-28 Bosch Gmbh Robert Verfahren und Vorrichtung zur adaptiven Einzelzylinder-Lambdaregelung bei einem Motor mit variabler Ventilsteuerung
DE4423241C2 (de) * 1994-07-02 2003-04-10 Bosch Gmbh Robert Verfahren zur Einstellung der Zusammensetzung des Betriebsgemisches für eine Brennkraftmaschine
US5483946A (en) 1994-11-03 1996-01-16 Ford Motor Company Engine control system with rapid catalyst warm-up
DE19501458B4 (de) 1995-01-19 2009-08-27 Robert Bosch Gmbh Verfahren zur Adaption der Warmlaufanreicherung
US5715796A (en) 1995-02-24 1998-02-10 Honda Giken Kogyo Kabushiki Kaisha Air-fuel ratio control system having function of after-start lean-burn control for internal combustion engines
US5743244A (en) * 1996-11-18 1998-04-28 Motorola Inc. Fuel control method and system with on-line learning of open-loop fuel compensation parameters
DE19955252C2 (de) * 1999-11-17 2002-11-07 Daimler Chrysler Ag Verfahren und Vorrichtung zur Regelung des Kraftstoff/Luftverhältnisses einer Otto-Brennkraftmaschine
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Non-Patent Citations (1)

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Also Published As

Publication number Publication date
US7191771B2 (en) 2007-03-20
WO2004074663A1 (fr) 2004-09-02
US20060137667A1 (en) 2006-06-29
EP1595065B1 (fr) 2008-04-09
DE502004006771D1 (de) 2008-05-21
DE10307004B3 (de) 2004-08-05

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