EP1524425B1 - Steuerungsverfahren für die Regeneration eines Partikelfilters - Google Patents

Steuerungsverfahren für die Regeneration eines Partikelfilters Download PDF

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Publication number
EP1524425B1
EP1524425B1 EP04300673A EP04300673A EP1524425B1 EP 1524425 B1 EP1524425 B1 EP 1524425B1 EP 04300673 A EP04300673 A EP 04300673A EP 04300673 A EP04300673 A EP 04300673A EP 1524425 B1 EP1524425 B1 EP 1524425B1
Authority
EP
European Patent Office
Prior art keywords
regeneration
engine
function
dilution
fuel
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
EP04300673A
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English (en)
French (fr)
Other versions
EP1524425A1 (de
Inventor
Vincent Brochon
Jean-Paul Fouet
Christian Ginoux
Jacques Lafite
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.)
Renault SAS
Original Assignee
Renault SAS
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Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP1524425A1 publication Critical patent/EP1524425A1/de
Application granted granted Critical
Publication of EP1524425B1 publication Critical patent/EP1524425B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02D41/22—Safety or indicating devices for abnormal 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
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
    • 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
    • F02D41/047—Taking into account fuel evaporation or wall wetting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/16—Controlling lubricant pressure or quantity
    • F01M2001/165—Controlling lubricant pressure or quantity according to fuel dilution in oil
    • 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
    • F02D2250/11—Oil dilution, i.e. prevention thereof or special controls according thereto
    • 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
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/401—Controlling injection timing

Definitions

  • the invention relates to a control method for the regeneration of a particle filter equipping a powertrain of a vehicle.
  • the heterogeneity of combustion processes in lean-burn engines, especially in diesel engines, has the effect of generating carbon particles, which can not be burned efficiently in the engine. This is reflected for example by the appearance, at the exit of the exhaust line, black smoke. This phenomenon is a source of pollution that we are trying to reduce.
  • the presence of a particulate filter in the exhaust line of the engine can significantly reduce the amount of particles, dust and other soot, emitted into the atmosphere, and meet pollution standards.
  • Regeneration devices controlled by a computer can periodically burn the particles trapped in the filter and prevent clogging of the latter.
  • Soot particles are essentially carbonaceous elements, and their combustion consumes oxygen to form carbon dioxide.
  • the triggering of the regeneration of the filter is controlled by a calculator which determines whether the regeneration should take place and, when it is in progress, whether it can continue.
  • the computer receives information on the operation of the vehicle. This information includes, for example, engine coolant temperatures, gases upstream and downstream of the particulate filter, vehicle speed, the soot mass accumulated in the particulate filter and the distance traveled since the last regeneration.
  • the calculator checks conditions on this information and triggers regeneration only if all conditions are met. Regeneration is maintained, even if certain conditions are no longer satisfied for a duration less than a predetermined threshold, of the order of one to two minutes. If at least one condition is no longer satisfied for a period longer than said threshold, then the regeneration process is interrupted.
  • the operating conditions of the engine are modified to increase the temperature of the exhaust gases before they pass through the particulate filter. These changes often involve fuel injection, which can be delayed for at least one engine cylinder. These modifications increase the fuel consumption and also the amount of fuel that dissolves in the engine oil, passing through the space between the cylinder and the piston.
  • the invention relates to a control method of a motorization system comprising a particulate filter receiving engine exhaust gas for retaining the exhaust gas particles, the process processing information and controlling the engine to obtain the regeneration of the particulate filter when necessary, characterized in that the process establishes an estimate of the fuel dilution rate in the oil, the process allowing regeneration if the estimate of the dilution ratio is below a predetermined dilution threshold.
  • the variation of the dilution ratio is evaluated by a first function representative of the evaporation, the fuel when no regeneration of the particulate filter is in progress, and by a second function when a regeneration of the particulate filter is In progress.
  • the behavioral difference is simulated according to whether a regeneration is in progress or not.
  • the second function is the sum of the first function and a third function.
  • the variation of the dilution ratio is evaluated as a function of the rotational speed of the engine and of a variable representing the engine load. Indeed these variables are very influential on the variation of the dilution rate.
  • variable representing the engine load is an injected fuel flow.
  • the first and second functions are stored in the form of maps.
  • the functions can be implemented in a simple way, after a phase of development of the motorization system.
  • a motorization system implementing the method according to the invention and shown in FIG. 1 comprises a diesel engine 1 supercharged by a turbocharger 2 and whose exhaust gas is treated with a catalytic particle filter 3.
  • motor 1 is supplied with air by an air circuit comprising an air intake 11, a compressor 12 of the turbocharger 2, a discharge pipe 13 and an intake pipe 14 opening into combustion chambers of the engine 1, a only chamber 15 being shown.
  • An exhaust gas recirculation circuit comprises a quilting 18 on the exhaust pipe, a selection valve 19 directing the exhaust gas to the discharge pipe through a cooler 20 or a direct pipe 21.
  • a computer 24 receives information on the operation of the engine system and controls the engine 1. It implements in particular the method according to the invention.
  • the computer 24 determines whether the regeneration must be controlled or not. For this, it establishes whether certain criteria are met. When all the criteria are satisfied, a regeneration control signal is delivered. The computer maintains the control signal of the regeneration for a predetermined duration D1 after at least one criterion is no longer satisfied.
  • the computer takes into account a criterion on the dilution rate Pdil of fuel in the engine oil.
  • the dilution rate is estimated by the calculator, and if the estimate of the dilution ratio Pdil is greater than a predetermined dilution threshold Sdil, the criterion is no longer satisfied.
  • an initialization step 30 the estimate of the dilution ratio Dpil is initialized either to a zero value if the oil is new, either at a value previously estimated and stored.
  • the test step 31 it is directed to a step 32 if no regeneration is in progress, or to a step 33 in the opposite case.
  • step 32 an estimate of variation of the dilution ratio dPdil is calculated by the opposite the product of a fuel evaporation evap function and a time step dt.
  • the Fevap function is calculated from a stored map, as a function of the rotation speed N and the fuel flow Qc.
  • step 33 the variation estimate of the dilution ratio dPdil is calculated as in step 32, in addition to the addition of the product of a regeneration function Grégé with a time step dt.
  • the Grégé regeneration function is also calculated from a stored map, as a function of the rotation speed N and the fuel flow Qc.
  • the new dilution rate Pdil (n) is calculated by adding to the dilution rate at the previous time step Pdil (n-1) the estimate of variation of the dilution of pH.
  • step 35 the dilution rate Pdil is compared with the predetermined dilution threshold Sdil: if it is higher, the criterion is not satisfied and a regeneration is prohibited (step 38). Otherwise, regeneration is allowed (step 39).
  • step 40 the time step dt is awaited before proceeding to a new calculation step, resuming at step 31.
  • the invention is not limited to the embodiment which has just been described only in as an example.
  • Other variables representative of the engine load such as air flow or intake air pressure, may be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Networks Using Active Elements (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Filtration Of Liquid (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Claims (6)

  1. Verfahren zur Steuerung eines Systems zur Motorisierung, aufweisend einen Motor (1), einen Partikelfilter (3), der die Abgase des Motors (1) empfängt, um die Partikel der Abgase zurückzuhalten, wobei das Verfahren Informationen verarbeitet und den Motor (1) steuert, um, wenn notwendig, die Regeneration des Partikelfilters (3) zu erwirken, dadurch gekennzeichnet, dass das Verfahren eine Schätzung des Verdünnungsgrads (Pdil) des Kraftstoffs im Öl aufstellt, wobei das Verfahren die Regeneration (39) autorisiert, wenn die Schätzung des Verdünnungsgrads (Pdil) kleiner als eine vorbestimmte Schwellenverdünnung (Sdil, 37) ist.
  2. Verfahren zur Steuerung gemäß Anspruch 1, in dem die Veränderung des Verdünnungsgrads (dPdil) durch eine erste Funktion (-Févap, 32) ermittelt wird, die für die Verdampfung des Kraftstoffs repräsentativ ist, wenn keine Regeneration des Partikelfilters im Gange ist, und durch eine zweite Funktion (33), wenn eine Regeneration des Partikelfilters im Gange ist.
  3. Verfahren zur Steuerung gemäß Anspruch 2, in dem die zweite Funktion (33) die Summe der ersten Funktion (-Févap) und einer dritten Funktion (Grégé) ist.
  4. Verfahren zur Steuerung gemäß einem der Ansprüche 1 bis 3, in dem die Veränderung des Verdünnungsgrads (dPdil) in Abhängigkeit der Drehzahl des Motors (N) und einer Variablen (Qc) ermittelt wird, die die Belastung des Motors repräsentiert.
  5. Verfahren zur Steuerung gemäß Anspruch 4, in dem die Variable, die die Belastung des Motors repräsentiert, ein Durchsatz an eingespritztem Kraftstoff (Qc) ist.
  6. Verfahren zur Steuerung gemäß Anspruch 2 oder 3, in dem die Funktionen (Févap, Grégé) in der Form von Kennfeldern gespeichert sind.
EP04300673A 2003-10-13 2004-10-11 Steuerungsverfahren für die Regeneration eines Partikelfilters Expired - Lifetime EP1524425B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0311926 2003-10-13
FR0311926A FR2860830B1 (fr) 2003-10-13 2003-10-13 Procede de commande pour la regeneration d'un filtre a particules

Publications (2)

Publication Number Publication Date
EP1524425A1 EP1524425A1 (de) 2005-04-20
EP1524425B1 true EP1524425B1 (de) 2006-05-17

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Family Applications (1)

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EP04300673A Expired - Lifetime EP1524425B1 (de) 2003-10-13 2004-10-11 Steuerungsverfahren für die Regeneration eines Partikelfilters

Country Status (5)

Country Link
EP (1) EP1524425B1 (de)
AT (1) ATE326624T1 (de)
DE (1) DE602004000902T2 (de)
ES (1) ES2259436T3 (de)
FR (1) FR2860830B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2941909A1 (fr) * 2009-02-10 2010-08-13 Renault Sas Procede et dispositif de controle d'un systeme de motorisation pour vehicule automobile

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4642546B2 (ja) 2005-05-13 2011-03-02 本田技研工業株式会社 内燃機関の排気浄化装置
FR2890411B1 (fr) * 2005-09-05 2010-10-29 Peugeot Citroen Automobiles Sa Systeme de determination du taux de dilution de l'huile de lubrification d'un moteur thermique de vehicule automobile par du carburant d'alimentation de celui-ci
JP2007162585A (ja) * 2005-12-14 2007-06-28 Nissan Motor Co Ltd エンジンの燃料噴射制御装置及び燃料噴射制御方法
JP4312225B2 (ja) * 2006-11-09 2009-08-12 トヨタ自動車株式会社 車載ディーゼルエンジン
DE102007031355A1 (de) * 2007-07-05 2009-01-08 Ford Global Technologies, LLC, Dearborn Verfahren und Vorrichtung zur Steuerung von Regenerationsvorgängen in einer Abgasnachbehandlungsvorrichtung
DE102007034822A1 (de) * 2007-07-26 2009-01-29 Ford Global Technologies, LLC, Dearborn Verbessertes Verfahren zur Steuerung der Regeneration eines Schadstoffkatalysators oder Partikelfilters
FR2933735B1 (fr) * 2008-07-08 2011-04-29 Peugeot Citroen Automobiles Sa Procede et dispositif de commande des regenerations d'un systeme de post-traitement des gaz d'echappement d'un moteur a combustion
FR2974853B1 (fr) 2011-05-06 2015-05-01 Renault Sa Procede d'estimation de la dilution du carburant dans l'huile d'un moteur a combustion interne
FR3040738B1 (fr) * 2015-09-07 2019-06-21 Psa Automobiles Sa. Procede de controle d’une dilution d’un carburant dans une huile de lubrification d’un moteur thermique de vehicule automobile

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20010786A1 (it) * 2001-08-03 2003-02-03 Fiat Ricerche Metodo di autoinnesco della rigenerazione di un filtro particolato per un motore diesel ad iniezione diretta provvisto di un impianto di ini
JP2003138952A (ja) * 2001-11-05 2003-05-14 Mitsubishi Motors Corp ディーゼル機関
DE10159479A1 (de) * 2001-12-04 2003-06-18 Daimler Chrysler Ag Verfahren zum Betrieb einer Brennkraftmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2941909A1 (fr) * 2009-02-10 2010-08-13 Renault Sas Procede et dispositif de controle d'un systeme de motorisation pour vehicule automobile

Also Published As

Publication number Publication date
ATE326624T1 (de) 2006-06-15
ES2259436T3 (es) 2006-10-01
FR2860830A1 (fr) 2005-04-15
FR2860830B1 (fr) 2006-01-13
DE602004000902D1 (de) 2006-06-22
EP1524425A1 (de) 2005-04-20
DE602004000902T2 (de) 2007-04-26

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