EP2786002A1 - Procédé pour faire fonctionner un moteur à combustion interne et appareil de commande adapté pour mettre en uvre ce procédé - Google Patents

Procédé pour faire fonctionner un moteur à combustion interne et appareil de commande adapté pour mettre en uvre ce procédé

Info

Publication number
EP2786002A1
EP2786002A1 EP12795389.1A EP12795389A EP2786002A1 EP 2786002 A1 EP2786002 A1 EP 2786002A1 EP 12795389 A EP12795389 A EP 12795389A EP 2786002 A1 EP2786002 A1 EP 2786002A1
Authority
EP
European Patent Office
Prior art keywords
time
lambda
probe
value
setpoint
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
EP12795389.1A
Other languages
German (de)
English (en)
Other versions
EP2786002B1 (fr
Inventor
Hermann Hahn
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 EP2786002A1 publication Critical patent/EP2786002A1/fr
Application granted granted Critical
Publication of EP2786002B1 publication Critical patent/EP2786002B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/101—Three-way catalysts
    • 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
    • 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
    • F02D41/1477—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation circuit or part of it,(e.g. comparator, PI regulator, output)
    • F02D41/1482—Integrator, i.e. variable slope
    • 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
    • F02D41/1477—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation circuit or part of it,(e.g. comparator, PI regulator, output)
    • F02D41/1483—Proportional component
    • 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
    • F02D41/1488—Inhibiting the regulation
    • 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
    • F02D41/1493—Details
    • F02D41/1495—Detection of abnormalities in the air/fuel ratio feedback 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
    • F02D41/24—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
    • F02D41/2474—Characteristics of sensors
    • 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
    • F02D2041/1413—Controller structures or design
    • F02D2041/1422—Variable gain or coefficients
    • 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
    • F02D2041/1413—Controller structures or design
    • F02D2041/1431—Controller structures or design the system including an input-output delay

Definitions

  • the invention relates to a method for operating an internal combustion engine, wherein an exhaust gas generated by the internal combustion engine is guided over a arranged in an exhaust passage 3-way catalyst.
  • FIG. 1 shows schematically the structure of an internal combustion engine 10 with a downstream exhaust system.
  • the internal combustion engine 10 may be a spark ignition engine (gasoline engine). With regard to their fuel supply, they can have a direct injection fuel supply, so working with internal mixture formation, or have a pilot fuel injection and thus work with external mixture formation.
  • the internal combustion engine 10 can be operated homogeneously, wherein in the entire combustion chamber of a cylinder, there is a homogeneous air-fuel mixture at the ignition point, or in an inhomogeneous mode (stratified charge mode), in which at the time of ignition a comparatively rich air-fuel mixture, especially in the area of a spark plug, is present, which is surrounded by a very lean mixture in the remaining combustion chamber.
  • the internal combustion engine 10 with a substantially stoichiometric air-fuel mixture can be operated, that is, with a mixture with a lambda value close to or equal to 1.
  • various parameters of the internal combustion engine 10, in particular the engine speed and the engine load are read from the engine control unit 28.
  • a controller implemented in the engine control unit 28 thus controls the operation of the internal combustion engine 10, in particular regulating the fuel supply and the air supply such that a desired fuel mass and a desired air mass supplied to represent a desired air-fuel mixture (the exhaust target lambda).
  • the air-fuel mixture is determined as a function of the operating point of the internal combustion engine 10, in particular the engine speed and the engine load from maps.
  • lambda modulation takes place as shown in FIG. 6 (actual lambda value from the probe signal: rich dark curve, control variable of the controller: bold bright curve, lambda nominal value ranges: bright rectangles).
  • the switching of the controller direction takes place.
  • P jump P component to reach the setpoint.
  • the size of the P-jump can depend on various parameters. Among others, the P-jump may be dependent on a fixed desired amplitude. In a preferred embodiment, it may be determined here which portion of the specified desired amplitude is to be displayed via the P jump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Analytical Chemistry (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un procédé pour faire fonctionner un moteur à combustion interne. Selon ce procédé, le gaz d'échappement produit par le moteur à combustion interne est conduit à travers un catalyseur 3 voies disposé dans le conduit d'échappement. Une sonde lambda détecte une grandeur caractéristique du coefficient lambda du gaz d'échappement en amont du catalyseur 3 voies et la transmet à un appareil de commande de moteur intégrant un régulateur PI ou PID. Par prédéfinition d'une valeur de consigne, un coefficient lambda sensiblement stœchiométrique du gaz d'échappement est établi au moyen du régulateur PI ou PID de l'appareil de commande de moteur, et une variation périodique prédéfinie de la valeur de consigne oriente alternativement ce coefficient lambda dans le sens d'un lambda pauvre et d'un lambda riche (modulation du coefficient lambda). Au début de chaque variation de la valeur de consigne, on prédéfinit une composante P pilotée suivie d'une composante I jusqu'à un instant t2, lequel instant t2 est défini au moyen de paramètres mémorisés caractérisant un comportement sur un temps de parcours de telle manière qu'à cet instant t2, le signal de la sonde, ou une grandeur dérivée de celui-ci, devrait avoir atteint la valeur de consigne prédéfinie. À partir de l'instant t2, on passe pendant un intervalle de temps prédéfinissable jusqu'à la fin de la variation de valeur de consigne courante à une régulation basée sur la différence entre une valeur réelle et la valeur de consigne de la sonde lambda ou sur une grandeur dérivée de celle-ci.
EP12795389.1A 2011-11-30 2012-11-23 Procédé de fonctionnement d'un moteur à combustion interne et appareil de commande pour l'exécution du procédé Active EP2786002B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011087399.6A DE102011087399B4 (de) 2011-11-30 2011-11-30 Verfahren zum Betreiben einer Verbrennungskraftmaschine sowie zur Ausführung des Verfahrens eingerichtetes Steuergerät
PCT/EP2012/073470 WO2013079405A1 (fr) 2011-11-30 2012-11-23 Procédé pour faire fonctionner un moteur à combustion interne et appareil de commande adapté pour mettre en œuvre ce procédé

Publications (2)

Publication Number Publication Date
EP2786002A1 true EP2786002A1 (fr) 2014-10-08
EP2786002B1 EP2786002B1 (fr) 2016-09-28

Family

ID=47290935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12795389.1A Active EP2786002B1 (fr) 2011-11-30 2012-11-23 Procédé de fonctionnement d'un moteur à combustion interne et appareil de commande pour l'exécution du procédé

Country Status (5)

Country Link
US (1) US9212584B2 (fr)
EP (1) EP2786002B1 (fr)
CN (1) CN103958868B (fr)
DE (1) DE102011087399B4 (fr)
WO (1) WO2013079405A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018007647B4 (de) * 2018-09-27 2021-06-02 Mtu Friedrichshafen Gmbh Verfahren zur modellbasierten Steuerung und Regelung einer Brennkraftmaschine mit einem SCR-Katalysator

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3802444A1 (de) * 1988-01-28 1989-08-10 Vdo Schindling Verfahren zur regelung des kraftstoff-luft-verhaeltnisses einer brennkraftmaschine
EP1403491B1 (fr) * 2001-06-19 2006-03-08 Honda Giken Kogyo Kabushiki Kaisha Dispositif, procede, et support d'enregistrement de programme de regulation du rapport du melange air-carburant
JP4213148B2 (ja) * 2005-08-09 2009-01-21 三菱電機株式会社 内燃機関の制御装置
JP4380625B2 (ja) * 2005-11-24 2009-12-09 トヨタ自動車株式会社 内燃機関の空燃比制御装置
US8132400B2 (en) * 2005-12-07 2012-03-13 Ford Global Technologies, Llc Controlled air-fuel ratio modulation during catalyst warm up based on universal exhaust gas oxygen sensor input
JP2007231844A (ja) * 2006-03-01 2007-09-13 Mitsubishi Electric Corp 内燃機関の制御装置
DE102006047188B4 (de) 2006-10-05 2009-09-03 Continental Automotive Gmbh Verfahren und Vorrichtung zum Überwachen einer Abgassonde
DE102006049656B4 (de) 2006-10-18 2016-02-11 Volkswagen Ag Lambda-Regelung mit einer Sprung-Lambda-Sonde
JP4256898B2 (ja) 2007-04-20 2009-04-22 三菱電機株式会社 内燃機関の空燃比制御装置
DE102007038478A1 (de) 2007-08-14 2009-02-19 Volkswagen Ag Verfahren zur λ-Regelung in Betriebsbereichen mit Kraftstoff-Mangel oder Kraftstoff-Überschuss bei einer Nernst-Sonde
JP4743443B2 (ja) * 2008-02-27 2011-08-10 株式会社デンソー 内燃機関の排気浄化装置
JP4877246B2 (ja) * 2008-02-28 2012-02-15 トヨタ自動車株式会社 内燃機関の空燃比制御装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013079405A1 *

Also Published As

Publication number Publication date
DE102011087399A1 (de) 2013-06-06
US9212584B2 (en) 2015-12-15
CN103958868B (zh) 2017-06-30
WO2013079405A1 (fr) 2013-06-06
WO2013079405A8 (fr) 2013-09-12
EP2786002B1 (fr) 2016-09-28
US20140345256A1 (en) 2014-11-27
DE102011087399B4 (de) 2022-08-11
CN103958868A (zh) 2014-07-30

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