EP1524425B1 - Control method for regeneration of a particle filter - Google Patents
Control method for regeneration of a particle filter Download PDFInfo
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- 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
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- Prior art keywords
- regeneration
- engine
- function
- dilution
- fuel
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- 230000008929 regeneration Effects 0.000 title claims abstract description 35
- 238000011069 regeneration method Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000002245 particle Substances 0.000 title claims abstract description 14
- 238000010790 dilution Methods 0.000 claims abstract description 32
- 239000012895 dilution Substances 0.000 claims abstract description 32
- 239000000446 fuel Substances 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 15
- 238000001704 evaporation Methods 0.000 claims abstract description 4
- 230000008020 evaporation Effects 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 2
- 238000013507 mapping Methods 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 4
- 239000010705 motor oil Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000004071 soot Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003542 behavioural effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- 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
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- 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)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Filtration Of Liquid (AREA)
- Networks Using Active Elements (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
L'invention concerne un procédé de commande pour la régénération d'un filtre à particules équipant un groupe motopropulseur d'un véhicule.The invention relates to a control method for the regeneration of a particle filter equipping a powertrain of a vehicle.
L'hétérogénéité des processus de combustion dans les moteurs à mélange pauvre, en particulier dans les moteurs Diesel, a pour effet de générer des particules de carbone, qui ne peuvent être brûlées efficacement dans le moteur. Cela se traduit par exemple par l'apparition, en sortie de la ligne d'échappement, de fumées noires. Ce phénomène est une source de pollution que l'on cherche à réduire.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.
La présence d'un filtre à particules dans la ligne d'échappement du moteur permet de diminuer considérablement la quantité de particules, poussières et autres suies, émises dans l'atmosphère, et de satisfaire aux normes antipollution.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.
Des dispositifs de régénération pilotés par un calculateur permettent de brûler périodiquement les particules piégées dans le filtre et d'éviter le colmatage de ce dernier. Les particules de suies sont des éléments essentiellement carbonés, et leur combustion consomme de l'oxygène pour former du gaz carbonique.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.
Ceci est effectué en élevant la température au sein du filtre à particules jusqu'à une température de l'ordre de 550 à 650 °C, température à partir de laquelle les particules de carbone retenues dans le filtre s'enflamment spontanément.This is done by raising the temperature within the particulate filter to a temperature of the order of 550 to 650 ° C, the temperature at which the carbon particles retained in the filter ignite spontaneously.
Le déclenchement de la régénération du filtre est contrôlé par un calculateur qui détermine si la régénération doit avoir lieu et, quand elle est en cours, si elle peut continuer. Pour cela, le calculateur reçoit des informations sur le fonctionnement du véhicule. Ces informations comprennent par exemple les températures du liquide de refroidissement du moteur, des gaz en amont et en aval du filtre à particules, la vitesse du véhicule, la masse de suie accumulée dans le filtre à particules et la distance parcourue depuis la dernière régénération.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. For this, 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.
Le calculateur vérifie des conditions sur ces informations et ne déclenche la régénération que si toutes les conditions sont satisfaites. La régénération est maintenue, même si certaines conditions ne sont plus satisfaites pendant une durée inférieure à un seuil prédéterminé, de l'ordre d'une à deux minutes. Si au moins une condition n'est plus satisfaite pendant une durée supérieure audit seuil, alors le processus de régénération est interrompu.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.
Pour déclencher et. maintenir la régénération, les conditions de fonctionnement du moteur sont modifiées pour augmenter la température des gaz d'échappement avant leur passage dans le filtre à particules. Ces modifications concernent souvent l'injection de carburant, qui peut être retardée pour au moins un cylindre du moteur. Ces modifications augmentent la consommation de carburant et également la quantité de carburant qui se dissout dans l'huile du moteur, en passant par l'espace entre le cylindre et le piston.To trigger and. maintain regeneration, 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.
Avec une nouvelle génération de filtres à particules catalytiques, qui intègrent les fonctions de pot catalytique et de filtre à particules, on doit agir pendant toute la durée de la régénération pour maintenir les conditions permettant la combustion des suies piégées dans le filtre. Les inconvénients mentionnés précédemment sont donc prolongés pendant toute la durée de la régénération. De plus, ils sont aggravés dans certaines conditions de fonctionnement du moteur, dans lesquelles peu de chaleur est naturellement apportée aux gaz d'échappement.With a new generation of catalytic particle filters, which integrate the functions of catalytic converter and particulate filter, one must act throughout the regeneration period to maintain the conditions for the combustion of soot trapped in the filter. The disadvantages mentioned above are therefore prolonged throughout the regeneration period. In addition, they are aggravated under certain operating conditions of the engine, in which little heat is naturally provided to the exhaust gas.
Le document US 2003/168039 A1 décrit un procédé de régénération d'un tel filtre, dans lequel une pression de post-injection est reduite pour limiter la dilution de l'huile du moteur.Document US 2003/168039 A1 describes a method of regeneration of such a filter, wherein a post-injection pressure is reduced to limit the dilution of the engine oil.
L'augmentation de la quantité de carburant diluée dans l'huile du moteur a pour effet de faire varier les caractéristiques de l'huile, éventuellement jusqu'à un point où le moteur pourrait se détériorer.Increasing the amount of fuel diluted in the engine oil has the effect of varying the characteristics of the oil, possibly to a point where the engine could deteriorate.
C'est donc un objectif de l'invention de proposer un procédé de commande d'un système de motorisation à moteur Diesel d'un véhicule comportant un filtre à particules limitant la dilution de carburant dans l'huile pour éviter de détériorer le moteur.It is therefore an object of the invention to provide a control method of a diesel engine drive system of a vehicle comprising a particle filter limiting the dilution of fuel in the oil to avoid damaging the engine.
Avec ces objectifs en vue, l'invention a pour objet un procédé de commande d'un système de motorisation comportant un filtre à particules recevant des gaz d'échappement du moteur pour retenir les particules des gaz d'échappement, le procédé traitant des informations et commandant le moteur pour obtenir la régénération du filtre à particules lorsque nécessaire, caractérisé en ce que le procédé établit une estimation du taux de dilution de carburant dans l'huile, le procédé autorisant la régénération si l'estimation du taux de dilution est inférieur à un seuil de dilution prédéterminé.With these objectives in view, 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.
Ainsi, la régénération est interdite si le taux de dilution est trop important. Le moteur est préservé contre un risque de détérioration.Thus, regeneration is prohibited if the dilution rate is too high. The engine is preserved against a risk of deterioration.
De préférence, la variation du taux de dilution est évaluée par une première fonction représentative de l'évaporation, du carburant lorsque aucune régénération du filtre à particules n'est en cours, et par une deuxième fonction lorsqu'une régénération du filtre à particules est en cours. On simule bien ainsi la différence de comportement selon qu'une régénération est en cours ou non.Preferably, 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. In this way, the behavioral difference is simulated according to whether a regeneration is in progress or not.
Selon un perfectionnement, la deuxième fonction est la somme de la première fonction et d'une troisième fonction.According to an improvement, the second function is the sum of the first function and a third function.
De manière avantageuse, la variation du taux de dilution est évaluée en fonction de la vitesse de rotation du moteur et d'une variable représentant la charge du moteur. En effet ces variables sont très influentes sur la variation du taux de dilution.Advantageously, 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.
De manière particulière, la variable représentant la charge moteur est un débit de carburant injecté.In particular, the variable representing the engine load is an injected fuel flow.
De préférence, la première et la deuxième fonction sont mémorisées sous forme de cartographies. Ainsi, les fonctions peuvent être mises en oeuvre de manière simple, après une phase de mise au point du système de motorisation.Preferably, the first and second functions are stored in the form of maps. Thus, the functions can be implemented in a simple way, after a phase of development of the motorization system.
L'invention sera mieux comprise et d'autres particularités et avantages apparaîtront à la lecture de la description qui va suivre, la description faisant référence aux dessins annexés parmi lesquels :
- la figure 1 est une vue schématique d'un système de motorisation conforme à l'invention ;
- la figure 2 est un organigramme de la commande de régénération du filtre à particules.
- Figure 1 is a schematic view of a motorization system according to the invention;
- Figure 2 is a flowchart of the regeneration control of the particulate filter.
Un système de motorisation mettant en oeuvre le procédé selon l'invention et représenté sur la figure 1, comporte un moteur 1 du type Diesel suralimenté par un turbocompresseur 2 et dont les gaz d'échappement sont traités par un filtre à particules catalytique 3. Le moteur 1 est alimenté en air par un circuit d'air comprenant une prise d'air 11, un compresseur 12 du turbocompresseur 2, une conduite de refoulement 13 et une tubulure d'admission 14 débouchant dans des chambres de combustion du moteur 1, une seule chambre 15 étant représentée.A motorization system implementing the method according to the invention and shown in FIG. 1 comprises a
Les gaz d'échappement produits par la combustion sont évacués de la chambre 15 par une tubulure d'échappement 16, traversent une turbine 17 du turbocompresseur, puis le filtre à particules catalytique 3. Un circuit de recyclage des gaz d'échappement comporte un piquage 18 sur la tubulure d'échappement, une vanne de sélection 19 orientant les gaz d'échappement vers la conduite de refoulement soit en passant par un refroidisseur 20, soit par une conduite directe 21.The exhaust gases produced by the combustion are discharged from the
Un calculateur 24 reçoit des informations sur le fonctionnement du système de motorisation et commande le moteur 1. Il met en oeuvre en particulier le procédé selon l'invention.A
Le calculateur 24 détermine si la régénération doit être pilotée ou non. Pour cela, il établit si certains critères sont satisfaits. Lorsque tous les critères sont satisfaits, un signal de commande de la régénération est délivré. Le calculateur maintient le signal de commande de la régénération pendant une durée prédéterminée D1 après qu'au moins un critère n'est plus satisfait.The
Selon l'invention, parmi les critères cités précédemment, le calculateur prend en compte un critère sur le taux de dilution Pdil de carburant dans l'huile du moteur. Le taux de dilution est estimé par le calculateur, et si l'estimation du taux de dilution Pdil est supérieure à un seuil de dilution Sdil prédéterminé, le critère n'est, plus satisfait.According to the invention, among the criteria mentioned above, 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.
Pour l'élaboration de ce critère, on se réfère à l'organigramme de la figure 2. Dans une étape d'initialisation 30, l'estimation du taux de dilution Dpil est initialisé soit à une valeur nulle si l'huile est neuve, soit à une valeur précédemment estimée et mémorisée. A l'étape de test 31, on oriente vers une étape 32 si aucune régénération n'est en cours, ou vers une étape 33 dans le cas contraire.For the elaboration of this criterion, reference is made to the flowchart of FIG. 2. In an
Lors de l'étape 32, une estimation de variation du taux de dilution dPdil est calculée par l'opposé du produit d'une fonction Févap d'évaporation du carburant et d'un pas de temps dt. La fonction Févap est calculée à partir d'une cartographie mémorisée, en fonction de la vitesse de rotation N et du débit de carburant Qc.In
Lors de l'étape 33, l'estimation de variation du taux de dilution dPdil est calculée comme à l'étape 32 avec en plus l'ajout du produit d'une fonction de régénération Grégé d'un pas de temps dt. La fonction de régénération Grégé est également calculée à partir d'une cartographie mémorisée, en fonction de la vitesse de rotation N et du débit de carburant Qc.In
Après l'évaluation de l'une des étapes 32 ou 33, le nouveau taux de dilution Pdil(n) est calculé en ajoutant au taux de dilution au pas de temps précédent Pdil(n-1) l'estimation de variation du taux de dilution dPdil.After the evaluation of one of the
Aux étapes 35 et 36, on s'assure que le taux de dilution ne deviendra pas négatif. Ensuite, à l'étape 37, le taux de dilution Pdil est comparé au seuil de dilution Sdil prédéterminé : s'il est supérieur, le critère n'est pas satisfait et une régénération est interdite (étape 38). Dans le cas contraire, une régénération est autorisée (étape 39).In
A l'étape 40, on attend l'écoulement du pas de temps dt avant de procéder à un nouveau pas de calcul, en reprenant à l'étape 31.In
L'invention n'est pas limitée au mode de réalisation qui vient d'être décrit uniquement à titre d'exemple. On pourra utiliser d'autres variables représentative de la charge du moteur, telle que le débit d'air ou la pression d'air d'admission.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.
Claims (6)
- A process for controlling a motorisation system comprising an engine (1) and a particulates filter (3) receiving exhaust gases from the engine (1) to retain the particles in the exhaust gases, the process processing items of information and controlling the engine (1) to implement regeneration of the particulates filter (3) when necessary, characterised in that the process establishes an estimate of the rate of dilution (Pdil) of fuel in the oil, the process authorising regeneration (39) if the estimate of the rate of dilution (Pdil) is below a predetermined dilution threshold (Sdil, 37).
- A control process according to claim 1 wherein the variation in the rate of dilution (dPdil) is evaluated by a first function (-Févap, 32) representative of evaporation of the fuel when no regeneration of the particulates filter is in progress and by a second function (33) when regeneration of the particulates filter is in progress.
- A control process according to claim 2 wherein the second function (33) is the sum of the first function (-Vévap) and a third function (Grégé).
- A control process according to one of claims 1 to 3 wherein the variation in the rate of dilution (dPdil) is evaluated in dependence on the speed of rotation of the engine (N) and a variable (Qc) representing the load of the engine.
- A control process according to claim 4 wherein the variable representing the engine load is an injected fuel flow rate (Qc).
- A control process according to claim 2 or claim 3 wherein the functions (Févap, Grégé) are stored in the form of mappings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0311926A FR2860830B1 (en) | 2003-10-13 | 2003-10-13 | CONTROL METHOD FOR REGENERATING A PARTICLE FILTER |
| FR0311926 | 2003-10-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1524425A1 EP1524425A1 (en) | 2005-04-20 |
| EP1524425B1 true EP1524425B1 (en) | 2006-05-17 |
Family
ID=34355418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04300673A Expired - Lifetime EP1524425B1 (en) | 2003-10-13 | 2004-10-11 | Control method for regeneration of a particle filter |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1524425B1 (en) |
| AT (1) | ATE326624T1 (en) |
| DE (1) | DE602004000902T2 (en) |
| ES (1) | ES2259436T3 (en) |
| FR (1) | FR2860830B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2941909A1 (en) * | 2009-02-10 | 2010-08-13 | Renault Sas | Motorization system controlling method for motor vehicle, involves triggering alarm on need for carrying out draining of oil when cumulated duration passes above predefined temporal threshold for attention of driver |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4642546B2 (en) | 2005-05-13 | 2011-03-02 | 本田技研工業株式会社 | Exhaust gas purification device for internal combustion engine |
| FR2890411B1 (en) * | 2005-09-05 | 2010-10-29 | Peugeot Citroen Automobiles Sa | SYSTEM FOR DETERMINING THE DILUTION RATE OF THE LUBRICATING OIL OF A MOTOR VEHICLE HEAT ENGINE BY FUEL FUEL THEREOF |
| JP2007162585A (en) | 2005-12-14 | 2007-06-28 | Nissan Motor Co Ltd | Fuel injection control device and fuel injection control method for engine |
| JP4312225B2 (en) | 2006-11-09 | 2009-08-12 | トヨタ自動車株式会社 | In-vehicle diesel engine |
| DE102007031355A1 (en) * | 2007-07-05 | 2009-01-08 | Ford Global Technologies, LLC, Dearborn | Exhaust gas treatment device i.e. nitrogen oxide adsorber, regeneration procedure controlling method for use in motor vehicle, involves generating regeneration request when predicted values lie below pre-determined threshold values |
| DE102007034822A1 (en) * | 2007-07-26 | 2009-01-29 | Ford Global Technologies, LLC, Dearborn | Method for controlling regeneration operation of pollutant catalyst or particle filter of exhaust gas system, involves selecting activation rules depending on detection of respective operating characteristic |
| FR2933735B1 (en) * | 2008-07-08 | 2011-04-29 | Peugeot Citroen Automobiles Sa | METHOD AND DEVICE FOR CONTROLLING THE REGENERATIONS OF AN EXHAUST GAS POST-PROCESSING SYSTEM OF A COMBUSTION ENGINE |
| FR2974853B1 (en) | 2011-05-06 | 2015-05-01 | Renault Sa | METHOD OF ESTIMATING DILUTION OF FUEL IN THE OIL OF AN INTERNAL COMBUSTION ENGINE |
| FR3040738B1 (en) * | 2015-09-07 | 2019-06-21 | Psa Automobiles Sa. | METHOD FOR CONTROLLING A DILUTION OF A FUEL IN A LUBRICATING OIL OF A THERMAL MOTOR OF A MOTOR VEHICLE |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITTO20010786A1 (en) * | 2001-08-03 | 2003-02-03 | Fiat Ricerche | SELF-PRIMING METHOD OF THE REGENERATION OF A PARTICULATE FILTER FOR A DIRECT INJECTION DIESEL ENGINE PROVIDED WITH AN INI PLANT |
| JP2003138952A (en) * | 2001-11-05 | 2003-05-14 | Mitsubishi Motors Corp | Diesel engine |
| DE10159479A1 (en) * | 2001-12-04 | 2003-06-18 | Daimler Chrysler Ag | Method for operating an internal combustion engine |
-
2003
- 2003-10-13 FR FR0311926A patent/FR2860830B1/en not_active Expired - Fee Related
-
2004
- 2004-10-11 AT AT04300673T patent/ATE326624T1/en not_active IP Right Cessation
- 2004-10-11 EP EP04300673A patent/EP1524425B1/en not_active Expired - Lifetime
- 2004-10-11 ES ES04300673T patent/ES2259436T3/en not_active Expired - Lifetime
- 2004-10-11 DE DE602004000902T patent/DE602004000902T2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2941909A1 (en) * | 2009-02-10 | 2010-08-13 | Renault Sas | Motorization system controlling method for motor vehicle, involves triggering alarm on need for carrying out draining of oil when cumulated duration passes above predefined temporal threshold for attention of driver |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2860830A1 (en) | 2005-04-15 |
| ATE326624T1 (en) | 2006-06-15 |
| DE602004000902D1 (en) | 2006-06-22 |
| EP1524425A1 (en) | 2005-04-20 |
| FR2860830B1 (en) | 2006-01-13 |
| ES2259436T3 (en) | 2006-10-01 |
| DE602004000902T2 (en) | 2007-04-26 |
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