WO2005116427A1 - Procede de commande de deroulement de phases de ventilation de reservoir et d'adaptation du melange dans un moteur a combustion interne et moteur a combustion interne equipe d'une commande de deroulement - Google Patents

Procede de commande de deroulement de phases de ventilation de reservoir et d'adaptation du melange dans un moteur a combustion interne et moteur a combustion interne equipe d'une commande de deroulement Download PDF

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Publication number
WO2005116427A1
WO2005116427A1 PCT/EP2004/004628 EP2004004628W WO2005116427A1 WO 2005116427 A1 WO2005116427 A1 WO 2005116427A1 EP 2004004628 W EP2004004628 W EP 2004004628W WO 2005116427 A1 WO2005116427 A1 WO 2005116427A1
Authority
WO
WIPO (PCT)
Prior art keywords
operating mode
adaptation
lambda
mixture adaptation
mixture
Prior art date
Application number
PCT/EP2004/004628
Other languages
German (de)
English (en)
Inventor
Axel Lang
Original Assignee
Volkswagen Aktiengesellschaft
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 Aktiengesellschaft filed Critical Volkswagen Aktiengesellschaft
Priority to PCT/EP2004/004628 priority Critical patent/WO2005116427A1/fr
Publication of WO2005116427A1 publication Critical patent/WO2005116427A1/fr

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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
    • F02D41/2454—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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/003—Adding fuel vapours, e.g. drawn from engine fuel reservoir
    • F02D41/0032—Controlling the purging of the canister as a function of the engine 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
    • F02D41/24—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
    • 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
    • F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
    • F02D41/3017—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used
    • F02D41/3035—Controlling fuel injection according to or using specific or several modes of combustion characterised by the mode(s) being used a mode being the premixed charge compression-ignition mode
    • 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
    • F02D41/3011—Controlling fuel injection according to or using specific or several modes of combustion
    • F02D41/3076—Controlling fuel injection according to or using specific or several modes of combustion with special conditions for selecting a mode of combustion, e.g. for starting, for diagnosing

Definitions

  • the invention relates to a method for sequence control of tank ventilation and mixture adaptation phases in an internal combustion engine and an internal combustion engine according to the preambles of the independent claims.
  • fuel can also be supplied to the engine from a tank ventilation system during so-called tank ventilation phases.
  • tank ventilation phases It is already known from EP 0 208 069 A to alternate tank ventilation phases and phases in which errors or tolerances of a mixture pre-control are compensated for by adaptation, according to a fixed time grid.
  • DE 100 43 072 A1 describes a method for compensating for mismatches in the pilot control of a fuel metering of an internal combustion engine, which is operated in at least two different operating modes, homogeneous or stratified. Mixture control and adaptation of the mixture control only take place in homogeneous operation. Switching between the operating modes depends on a target operating mode, which is determined from a plurality of operating mode requirements. Each of the operating mode requirements is assigned a priority. The target operating mode is determined depending on the priorities of the operating mode requirements. The physical urgency of the adaptation is increased in different time frames and a switchover to homogeneous operation is required.
  • Another aspect of this task is the creation of a corresponding internal combustion engine.
  • operating mode requirements are set according to at least one of the following rules:
  • variable time slots with a maximum duration
  • FIG. 1 shows an internal combustion engine with a fuel tank and a tank ventilation system.
  • FIG. 2 shows a sequence of tank ventilation and mixture adaptation phases according to the prior art.
  • FIG. 3 shows time slots for the method according to the invention.
  • FIG. 4 shows another time slots for the method according to the invention
  • FIG. 1 shows a schematic representation of an internal combustion engine which is lean-running and has a tank ventilation system, for example a direct-injection gasoline engine, preferably also capable of stratified charging, with an intake pipe 2 and an exhaust tract 3.
  • a throttle valve 5 is arranged in the intake pipe 2 by means of a fuel pump 7 and one Injection valve 4, fuel is transported from a fuel tank 6 into the intake pipe 2.
  • the tank ventilation system comprises a tank ventilation line 10, via which outgassed fuel can be conducted from the tank 6 into the intake pipe 2.
  • an absorption filter 8 and a ventilation valve 9 are also arranged in the ventilation line 10.
  • An engine control unit MSG uses sensors, in particular a lambda sensor 11 in the exhaust tract 3, tank sensors 12 in the area of the fuel tank 6, a NOx sensor 13, which is arranged downstream of a NOx storage catalytic converter 14 in the exhaust tract 3, a sensor for detecting the position the throttle valve 5 and a sensor for detecting the state of the ventilation valve 9, operating parameters of the internal combustion engine.
  • operating parameters of internal combustion engine 1 are influenced by engine control unit MSG via actuators (not shown).
  • the engine control unit MSG comprises a lambda control device for controlling the oxygen concentration of the lambda value or in the exhaust gas.
  • a mixture precontrol is overlaid with a regulation.
  • Correction variables are derived from the behavior of the control manipulated variable during mixture adaptation phases in order to compensate for mismatching of the pilot control to changed operating conditions.
  • Different adaptation variables are preferably adapted in different adaptation areas of the operation of the internal combustion engine.
  • At least two separate areas are preferably used for the selection of the errors, an additive and a multiplicative error.
  • mixture adaptation release conditions In order to carry out the mixture adaptation, mixture adaptation release conditions must be fulfilled, in the presence of which there is a mixture adaptation release. These relate, for example, to the engine temperature, the operational readiness of the lambda sensor and certain load and speed values of the engine 1. Furthermore, in order to carry out a mixture adaptation, it is necessary that the tank ventilation system, in particular the absorption filter 8, has only a low load of fuel gas.
  • a tank ventilation phase can take place either in throttled mode or in unthrottled lean mode, depending on the pressure drop between the intake pipe 2 and the tank system 6.
  • the tank ventilation system system is preferably activated when there is a high load of fuel outgassing. Further conditions for activating the tank ventilation system can be, for example, certain speed and load values of the internal combustion engine 1.
  • the tank ventilation can be carried out in different intensities, which in turn can be selected depending on various operating parameters, in particular the operating mode and the current load / speed values of the internal combustion engine of the internal combustion engine 1.
  • the internal combustion engine 1 is switched in a manner known per se by the engine control unit MSG between different operating modes depending on a target operating mode.
  • the requested operating modes include, in particular, tank ventilation and mixture adaptation phases.
  • the tank ventilation phase can basically take place at any lambda value and, if necessary, in stratified charge mode.
  • the target operating mode is determined from a plurality of operating mode requests. A priority is assigned to each operating mode request, the target operating mode being determined as a function of the priorities of the operating mode requests.
  • Corresponding software or circuit arrangements are implemented in the engine control unit MSG. In particular, the engine control unit MSG has a device 15 for sequence control.
  • FIG. 2 shows a time sequence of tank ventilation and mixture adaptation phases, TE or GA, according to the prior art.
  • a mixture adaptation takes place during a first time interval T1, which is activated by a corresponding request of a corresponding operating mode.
  • the time grid T2, T3 used is constant.
  • the time interval T1 can be somewhat longer than the subsequent time intervals T3 for carrying out a basic adaptation.
  • FIG. 3 shows a time grid with a sequence of time intervals for the sequence control of tank ventilation and mixture adaptation phases according to the invention.
  • the mixture adaptation phase GA can last a maximum of one time window with the length T GA and the tank ventilation phase can last a maximum of one time window with the length T T E.
  • these maximum times do not have to be fully utilized by the respective function, so that a reduction in the frequency of requests for mixture adaptation phases and the average duration of mixture adaptation phases is achieved.
  • Such a prematurely terminated tank ventilation phase is restarted after the mixture adaptation phase has ended and is ended after T TE has expired.
  • This tank ventilation phase is followed by a new mixture adaptation phase.
  • FIG. 3 also shows that a mixture adaptation phase is ended if the corresponding adaptation values have settled into the respective adaptation range. Therefore T GA ⁇ ⁇ T GA •
  • T GA The maximum time during which the mixture adaptation phase is active, is selected because, for example, in the case of driving conditions such as overrun or high driving dynamics, the mixture adaptation release conditions can no longer exist temporarily.
  • time In order to enable an adaptation, time must be reserved accordingly. This time must be long enough to allow errors to be adapted even with larger errors.
  • the mixture adaptation phase In the case of an error, the mixture adaptation phase must last a minimum time so that it can be recognized whether an adaptation must follow.
  • the time grid can also be selected depending on whether an error or an error is suspected. The mixture adaptation phase is advantageously not terminated before the minimum learning time of the mixture adaptation control has expired.
  • FIG. 4 shows a temporal structuring of a tank ventilation phase TE according to the invention.
  • a tank ventilation phase TE After a mixture adaptation phase GA with the time T GA , a tank ventilation phase TE begins with a total time T TE .
  • the total time T TE comprises a first sub-area T TE1 during which the request for a mixture adaptation phase is prohibited. This ensures a minimal fuel flushing of the tank ventilation system.
  • a mixture adaptation phase is forcibly requested at the latest after the maximum time T TE has expired. LIST OF REFERENCE NUMBERS

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  • 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)

Abstract

L'invention concerne un procédé de commande de déroulement de phases de ventilation de réservoir et d'adaptation du mélange dans un moteur à combustion interne pouvant être actionné en mode lambda = 1 et en mode de fonctionnement à mélange pauvre, avec un système de ventilation de réservoir pouvant être commuté entre des modes de fonctionnement, en fonction d'un mode de fonctionnement théorique, déterminé sur la base d'une pluralité d'exigences en matière de modes de fonctionnement. En cas de lancement d'adaptation du mélange, il est possible de demander une phase d'adaptation du mélange avec lambda = 1 et en cas de lancement d'une phase ventilation de réservoir, il est possible de demander une phase de ventilation du réservoir. Selon l'invention, il est prévu d'établir l'ordre de priorité des exigences en matière de modes de fonctionnement, en fonction d'au moins une des règles du groupe qui suit : les phases de ventilation de réservoir et d'adaptation du mélange présentent dans chaque cas des fenêtres temporelles de longueur maximale T < TTE et TGA, mais qui n'ont pas à être pleinement utilisées ; en cas de mode de fonctionnement lambda 1, la demande de phase d'adaptation du mélange avec un mode de fonctionnement lambda = 1 intervient après déroulement de TTE ou d'ores et déjà au moment où un mode de fonctionnement lambda = 1 et un lancement d'adaptation du mélange existent ; une phase d'adaptation du mélange est terminé si les valeurs d'adaptation correspondantes ont été établies ; une demande de phase d'adaptation du mélange est interdite pour un cycle de marche donné, s'il intervient une adaptation de préférence vérifiée, pour une quantité prédéfinie de zones d'adaptation, en d'autres termes, en présence d'un mode de fonctionnement lambda = 1 et de lancement d'une phase d'adaptation du mélange. L'invention concerne en outre un moteur à combustion interne pouvant être actionné selon ledit procédé.
PCT/EP2004/004628 2004-04-30 2004-04-30 Procede de commande de deroulement de phases de ventilation de reservoir et d'adaptation du melange dans un moteur a combustion interne et moteur a combustion interne equipe d'une commande de deroulement WO2005116427A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2004/004628 WO2005116427A1 (fr) 2004-04-30 2004-04-30 Procede de commande de deroulement de phases de ventilation de reservoir et d'adaptation du melange dans un moteur a combustion interne et moteur a combustion interne equipe d'une commande de deroulement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2004/004628 WO2005116427A1 (fr) 2004-04-30 2004-04-30 Procede de commande de deroulement de phases de ventilation de reservoir et d'adaptation du melange dans un moteur a combustion interne et moteur a combustion interne equipe d'une commande de deroulement

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Publication Number Publication Date
WO2005116427A1 true WO2005116427A1 (fr) 2005-12-08

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0208069A2 (fr) 1985-05-31 1987-01-14 Robert Bosch Gmbh Procédé et dispositif pour commander l'aération du réservoir de carburant de moteurs à combustion
EP0576448A1 (fr) 1991-03-22 1994-01-05 Bosch Gmbh Robert Procede et dispositif pour la ventilation de reservoirs.
US5720256A (en) * 1995-11-20 1998-02-24 Unisia Jecs Corporation Apparatus and method for controlling idle rotation speed learning of an internal combustion engine
DE19906378A1 (de) * 1999-02-16 2000-08-17 Bosch Gmbh Robert Verfahren und Vorrichtung zum Betrieb einer Brennkraftmaschine
DE10043072A1 (de) 2000-09-01 2002-03-14 Bosch Gmbh Robert Verfahren zur Gemischadaption bei Verbrennungsmotoren mit Benzindirekteinspritzung
US6397829B1 (en) * 1999-08-31 2002-06-04 Suzuki Motor Corporation Purge control system of engine
US6415779B1 (en) * 1998-02-25 2002-07-09 Magneti Marelli France Method and device for fast automatic adaptation of richness for internal combustion engine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0208069A2 (fr) 1985-05-31 1987-01-14 Robert Bosch Gmbh Procédé et dispositif pour commander l'aération du réservoir de carburant de moteurs à combustion
EP0576448A1 (fr) 1991-03-22 1994-01-05 Bosch Gmbh Robert Procede et dispositif pour la ventilation de reservoirs.
US5720256A (en) * 1995-11-20 1998-02-24 Unisia Jecs Corporation Apparatus and method for controlling idle rotation speed learning of an internal combustion engine
US6415779B1 (en) * 1998-02-25 2002-07-09 Magneti Marelli France Method and device for fast automatic adaptation of richness for internal combustion engine
DE19906378A1 (de) * 1999-02-16 2000-08-17 Bosch Gmbh Robert Verfahren und Vorrichtung zum Betrieb einer Brennkraftmaschine
US6397829B1 (en) * 1999-08-31 2002-06-04 Suzuki Motor Corporation Purge control system of engine
DE10043072A1 (de) 2000-09-01 2002-03-14 Bosch Gmbh Robert Verfahren zur Gemischadaption bei Verbrennungsmotoren mit Benzindirekteinspritzung

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