EP1766213A1 - System for evaluating the charge state of an exhaust line depollution means - Google Patents
System for evaluating the charge state of an exhaust line depollution meansInfo
- Publication number
- EP1766213A1 EP1766213A1 EP05781810A EP05781810A EP1766213A1 EP 1766213 A1 EP1766213 A1 EP 1766213A1 EP 05781810 A EP05781810 A EP 05781810A EP 05781810 A EP05781810 A EP 05781810A EP 1766213 A1 EP1766213 A1 EP 1766213A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow rate
- pollution control
- state
- control means
- depollution
- 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.)
- Withdrawn
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
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
-
- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
- F01N11/005—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus the temperature or pressure being estimated, e.g. by means of a theoretical model
-
- 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
- F02D41/14—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
- F02D41/1445—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 related to the exhaust flow
-
- 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
- F02D41/1448—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 exhaust gas pressure
-
- 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
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/04—Methods of control or diagnosing
- F01N2900/0422—Methods of control or diagnosing measuring the elapsed time
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/08—Exhaust gas treatment apparatus parameters
- F02D2200/0812—Particle filter loading
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
- F02D2200/703—Atmospheric pressure
-
- 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
- F02D41/1446—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 exhaust temperatures
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to a system for evaluating the state of charge of depollution means. More particularly, the invention relates to such a system wherein the pollution control means are integrated in an exhaust line of a motor vehicle mo ⁇ tor.
- Such an engine may be associated with common rail fuel supply means of the cylinders thereof, according to at least one post-injection.
- Such a post-injection is, in a conventional manner, an injection of carbu ⁇ rant after top dead center of the cylinder considered.
- These power supply means are adapted to implement, at iso ⁇ torque, by modifying engine operating control parameters, different regeneration strategies to obtain different thermal levels in the exhaust line.
- feeding means implementing regeneration strategies called normal, level 1, level 2 and / or ni ⁇ calf 2 overcalibrated have already been proposed.
- depol ⁇ lution means such as a particulate filter
- the soot trapped in it is burned thanks to the heat supplied by the engine and the exotherm produced by the combus ⁇ tion HC and CO on oxidation catalyst means, placed for example upstream of the particulate filter.
- This combustion can be assisted by a catalyst element melan ⁇ with soot, resulting for example from a regeneration aid additive, mixed with the engine feed fuel or by a catalyst deposited directly on the walls of the filter to particles (catalyzed particle filter).
- the state of charge of the depollution means must be eva ⁇ read as reliably as possible, for reasons of safety func ⁇ tioning thereof and the engine, and to optimize the triggering of regeneration.
- the object of the invention is therefore to propose such a system.
- the subject of the invention is a system for evaluating the state of charge of depollution means integrated in an exhaust line of a motor vehicle engine, characterized in that it comprises means for determining a pressure at the level of the depollution means, means for determining the volume flow rate of the gases upstream of these depol ⁇ lution means and means for comparing the state point of the depollution means, defined by the pressure and the volume flow thus determined, a prede terminated abacus of states absent, overloaded and clogged means of pollution control, to evaluate the state thereof.
- the pressure is an absolute pressure upstream of the depol ⁇ lution means and the volume flow rate upstream of the depollution means is determined according to the following relationship:
- Q VOI (R * (AT2 + 273.15) / P4 * Air mass flow rate) in which Q VO ⁇ represents the flow rate, R is a constant,
- AT2 represents the temperature of the gases upstream of the pollution control means
- P4 is the absolute pressure of the gases delivered by an absolute pressure sensor at the inlet of the pollution control means
- air mass flow rate is the flow rate of the gases passing through the depollution means.
- the states of the depollution means are defined by absentee state, overloaded state and clogged state curves, the state curve of which is absent from the depollution means is multiplied by an altimetric correction coefficient as a function of the atmospheric pressure
- the comparison means comprise means for comparing the volume flow rate determined with a low volume flow rate threshold value to allow the determination of the state of the depollution means only if the determined volume flow rate is greater than the value. low threshold; the comparison means comprise means for validating the state if the latter is maintained for a period of time greater than a predetermined period of confirmation time;
- the depollution means comprise a particulate filter
- the particulate filter is catalyzed;
- the depollution means comprise a NOx trap;
- the fuel comprises an additive intended to be deposited with parti ⁇ cules to which it is mixed, on the means of depollution to facilitate their regeneration;
- the depollution means are impregnated with an SCR formulation, ensuring a CO / HC oxidation function
- the fuel comprises an additive forming a NOx trap
- the engine is associated with a turbocharger.
- FIG. 1 represents a block diagram illustrating the general structure and operation of an engine equipped with depollution means
- FIG. 2 represents a block diagram illustrating the general structure and operation of an evaluation system according to the invention
- FIG. 3 represents a predetermined abacus of states of the depollution means
- FIGS. 4 and 5 illustrate two alternative embodiments of means for determining the volume flow rate of the gases upstream of the depollution means.
- the engine may for example be a diesel engine of an auto-mobile vehicle, the pollution control means comprising for example a particulate filter or others, associated with oxidation catalyst means or the like, as already known in the state of the art.
- This engine is associated with common rail fuel supply means, designated by the general reference 4 in this figure, adapted to implement, under the control of for example a calculator designated by the general reference 5, strategies regeneration of the depollution means by using post-injections of fuel in the engine cylinders.
- This calculator also comprises means for evaluating the state of charge of the depollution means.
- this calculator includes means for determining the differential pressure at the terminals of the depollution means, or the absolute pressure upstream of the pollution control means, designated by the general reference 7 in this figure 2 and means for determining the volume flow rate of the gases upstream of these depol ⁇ lution means, these means being designated by the general reference 8.
- the calculator comprises means for defining a state point of the depollution means from this volume flow rate and this differential pres ⁇ tion, designated by the general reference 9 and means 10 for comparing the state point and defined means of pollution control, to a predetermined abacus state of absence, overloaded or clogged with these depollution means, this abacus being for example stored in storage means designated by the general reference 11.
- the density determination means 8 receive as input the temperature of the gases upstream of the particulate filter, from a sensor designated by the general reference 12 on this figure, the differential pressure from a sensor designated by the general reference 13, the atmospheric pressure measured from a sensor designated by the general reference 14 and a gas mass flow rate information passing through these means of decontamination, from corresponding determination means designated by general reference 15.
- volume flow is calculated according to the following relation:
- Qv o i (R * (AT2 + 273.15) / ( ⁇ P + P atmo) * Air mass flow rate) in which Q VO ⁇ represents the volume flow rate, R is a constant, AT2 is the temperature of the gases upstream of the means of depollution, ⁇ P is the differential pressure at the terminals of the pollution control means, Patmo is the atmospheric pres ⁇ sion and air mass flow rate is the flow of gas passing through the means of depollution.
- an absolute pressure sensor upstream of the depollution means can also be envisaged.
- the density determination means 8 then receive, at the inlet, the temperature of the gases upstream of the particulate filter from the sensor 12, the mass flow rate. of air passing through the means of decontamination from the means of determination 15, and the absolute pressure of the gases at the inlet of the depollution means from a corresponding sensor designated by the general reference 16.
- the determining means 8 can determine the volumetric flow rate by the following relation:
- Q vo i (R * (AT2 + 273.15) / P4 * Air mass flow rate) in which Q VO ⁇ represents the volume flow rate, R is a constant, AT2 is the gas temperature upstream of the particulate filter, P4 is the absolute pressure at the inlet of the pollution control means and air mass flow rate is the flow rate of the gases passing through the depollution means.
- the abacus then has three curves, respectively C Absent, C Overloaded, C Plugged, which respectively enable the presence or the absence of the depollution means, a clogged state of the pollution control means making it possible to ensure the protection of the engine and an overloaded state of the depollution means securing the charge indicator coming for example from other charge determination modules of these depollution means in case of drift thereof and thus ensuring the protection of the depollution means vis-à-vis too critical regeneration temperatures.
- the determination of the state of charge can of course be subject to a condition of maintaining this state during a predetermined state confirmation time.
- the state of the depollution means must of course be memorized at each power failure of the computer 5.
- the Absent C curve can for example be multiplied by an altimetric correction coefficient as a function of the atmospheric pressure.
- the detection of the different states can also be subjected to a comparison of the volume flow rate determined with a low threshold value of volume flow, this threshold being for example calibratable.
- the comparison means 10 can also be adapted to compare the determined volume flow rate with this low limit threshold value ca ⁇ librable, to allow the determination of the state of the pollution control means only if the determined volume flow is higher at the low threshold value. Additional conditions may also be set for detecting the absence of the depollution means.
- the learning phase of the offset of the latter must be completed, the rate of the post-injections must be zero for a predetermined minimum duration and that a time counter allows the detection of such a state.
- the Absent C curve can be obtained by characterization on a motor bed of a catalyst + FAP assembly in the absence of FAP.
- the curve is then constructed by taking the different values of ⁇ P according to Q vol.
- Curve C overloaded can be, for example, a trans ⁇ position of the C-shaped curve.
- depollution means may be provided.
- the depollution means and the oxidation catalyst means may be integrated into one and the same element, in particular on the same substrate.
- a particulate filter incorporating the oxidation function can be envisaged.
- depollution means may also be impregnated with a SCR formulation providing a CO / HC oxidation function in a conventional manner.
- NOx trap incorporating an oxidation function can also be envisaged, whether or not it is additive.
- This oxidation function and / or NOx trap can be filled for example by an additive mixed with the fuel.
- the fuel may in fact comprise an additive intended to be deposited with the particles to which it is mixed on the means of pollution, to facilitate their regeneration.
- the engine may or may not be associated with a turbocharger.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The inventive system for evaluating the charged state of depollution means integrated into the exhaust line of a motor vehicle engine is characterised in that it comprises means (7) for determining a pressure in the depollution means, means (8) for determining the volume gas flowrate upstream said depollution means (10) and means for comparing the depollution means state defined by the thus determined pressure and the volume flowrate with a predetermined diagram (11) of the absent, overcharged and clogged states of the depollution means in order to evaluate the state thereof.
Description
Système d'évaluation de l'état de charge de moyens de dépollution d'une ligne d'échappement. System for evaluating the state of charge of depollution means of an exhaust line.
La présente invention concerne un système d'évaluation de l'état de charge de moyens de dépollution. Plus particulièrement, l'invention concerne un tel système dans lequel les moyens de dépollution sont intégrés dans une ligne d'échappement d'un mo¬ teur de véhicule automobile.The present invention relates to a system for evaluating the state of charge of depollution means. More particularly, the invention relates to such a system wherein the pollution control means are integrated in an exhaust line of a motor vehicle mo¬ tor.
Un tel moteur peut être associé à des moyens à rampe commune d'alimentation en carburant des cylindres de celui-ci, selon au moins une post- injection.Such an engine may be associated with common rail fuel supply means of the cylinders thereof, according to at least one post-injection.
Une telle post-injection est, de façon classique, une injection de carbu¬ rant après le point mort haut du cylindre considéré.Such a post-injection is, in a conventional manner, an injection of carbu¬ rant after top dead center of the cylinder considered.
Ces moyens d'alimentation sont adaptés pour mettre en œuvre, à iso¬ couple, par modification de paramètres de contrôle de fonctionnement du moteur, différentes stratégies de régénération permettant d'obtenir des niveaux thermi¬ ques différents dans la ligne d'échappement.These power supply means are adapted to implement, at iso¬ torque, by modifying engine operating control parameters, different regeneration strategies to obtain different thermal levels in the exhaust line.
Ainsi par exemple, des moyens d'alimentation mettant en œuvre des stratégies de régénération dites normale, de niveau 1 , de niveau 2 et/ou de ni¬ veau 2 surcalibré ont déjà été proposées. On sait en effet que pour assurer la régénération de moyens de dépol¬ lution tels qu'un filtre à particules, les suies piégées dans celui-ci sont brûlées grâce à la thermique fournie par le moteur et l'exotherme réalisé par la combus¬ tion des HC et du CO sur des moyens formant catalyseur d'oxydation, placés par exemple en amont du filtre à particules. Cette combustion peut être assistée par un élément catalyseur mélan¬ gé aux suies, issu par exemple d'un additif d'aide à la régénération, mélangé au carburant d'alimentation du moteur ou bien par un catalyseur déposé directement sur les parois du filtre à particules (filtre à particules catalysé).Thus for example, feeding means implementing regeneration strategies called normal, level 1, level 2 and / or ni¬ calf 2 overcalibrated have already been proposed. It is known that in order to ensure the regeneration of depol¬ lution means such as a particulate filter, the soot trapped in it is burned thanks to the heat supplied by the engine and the exotherm produced by the combus¬ tion HC and CO on oxidation catalyst means, placed for example upstream of the particulate filter. This combustion can be assisted by a catalyst element melan¬ with soot, resulting for example from a regeneration aid additive, mixed with the engine feed fuel or by a catalyst deposited directly on the walls of the filter to particles (catalyzed particle filter).
Plus les niveaux thermiques dans la ligne d'échappement en entrée du filtre à particules sont élevés, plus la durée de régénération du filtre est courte.The higher the thermal levels in the exhaust line at the inlet of the particulate filter, the shorter the regeneration time of the filter.
Cependant, l'état de charge des moyens de dépollution doit être éva¬ lué de manière la plus fiable possible, pour des questions de sécurité de fonc¬ tionnement de ceux-ci et du moteur, et pour optimiser le déclenchement de la régénération.
Le but de l'invention est donc de proposer un tel système.However, the state of charge of the depollution means must be eva¬ read as reliably as possible, for reasons of safety func¬ tioning thereof and the engine, and to optimize the triggering of regeneration. The object of the invention is therefore to propose such a system.
A cet effet, l'invention a pour objet un système d'évaluation de l'état de charge de moyens de dépollution intégrés dans une ligne d'échappement d'un moteur de véhicule automobile, caractérisé en ce qu'il comporte des moyens de détermination d'une pression au niveau des moyens de dépollution, des moyens de détermination du débit volumique des gaz en amont de ces moyens de dépol¬ lution et des moyens de comparaison du point d'état des moyens de dépollution, défini par la pression et le débit volumique ainsi déterminés, à un abaque prédé¬ terminé d'états absent, surchargé et colmaté des moyens de dépollution, pour évaluer l'état de ceux-ci.For this purpose, the subject of the invention is a system for evaluating the state of charge of depollution means integrated in an exhaust line of a motor vehicle engine, characterized in that it comprises means for determining a pressure at the level of the depollution means, means for determining the volume flow rate of the gases upstream of these depol¬ lution means and means for comparing the state point of the depollution means, defined by the pressure and the volume flow thus determined, a prede terminated abacus of states absent, overloaded and clogged means of pollution control, to evaluate the state thereof.
Suivant d'autres caractéristiques de l'invention :According to other features of the invention:
- la pression est une pression différentielle aux bornes des moyens de dépollution et le débit volumique en amont des moyens de dépollution est déter¬ miné selon la relation suivante : Qvoi=(R*(AT2 + 273.15) / (ΔP + P atmo)* Débit masse air) dans laquelle QVOι représente le débit volumique, R est une constante, AT2 est la température des gaz en amont des moyens de dépollution, ΔP est la pression différentielle aux bornes de ces moyens de dépollution, délivrée par un capteur de pression différentielle, Patmo est la pression atmosphérique et débit masse air est le débit des gaz traversant les moyens de dépollution ;- the pressure is a differential pressure across the depollution means and the volume flow rate upstream of the depollution means is déter¬ mined according to the following relation: Qv i = o (R * (AT2 + 273.15) / (.DELTA.P + P atmo ) * Air mass flow rate) in which Q VO ι represents the volume flow rate, R is a constant, AT2 is the temperature of the gases upstream of the pollution control means, ΔP is the differential pressure across these depollution means, delivered by a Differential pressure sensor, Patmo is the atmospheric pressure and air mass flow rate is the flow of gases passing through the means of depollution;
- la pression est une pression absolue en amont des moyens de dépol¬ lution et le débit volumique en amont des moyens de dépollution est déterminé selon la relation suivante :the pressure is an absolute pressure upstream of the depol¬ lution means and the volume flow rate upstream of the depollution means is determined according to the following relationship:
QVOI=(R*(AT2 + 273.15) / P4* Débit masse air) dans laquelle QVOι représente le débit volumique, R est une constante,Q VOI = (R * (AT2 + 273.15) / P4 * Air mass flow rate) in which Q VO ι represents the flow rate, R is a constant,
AT2 représente la température des gaz en amont des moyens de dépollution, P4 est la pression absolue des gaz délivrée par un capteur de pression absolue en entrée des moyens de dépollution, et débit masse air est le débit des gaz traver¬ sant les moyens de dépollution ; - les états des moyens de dépollution sont définis par des courbes d'état absent, d'état surchargé et d'état colmaté, dont la courbe d'état absent des moyens de dépollution est multipliée par un coefficient de correction altimétrique en fonction de la pression atmosphérique ;
- les moyens de comparaison comprennent des moyens de comparai¬ son du débit volumique déterminé à une valeur de seuil bas de débit volumique pour n'autoriser la détermination de l'état des moyens de dépollution que si le débit volumique déterminé est supérieur à la valeur de seuil bas ; - les moyens de comparaison comprennent des moyens de validation de l'état si celui-ci est maintenu pendant une période de temps supérieure à une période de temps de confirmation prédéterminée ;AT2 represents the temperature of the gases upstream of the pollution control means, P4 is the absolute pressure of the gases delivered by an absolute pressure sensor at the inlet of the pollution control means, and air mass flow rate is the flow rate of the gases passing through the depollution means. ; the states of the depollution means are defined by absentee state, overloaded state and clogged state curves, the state curve of which is absent from the depollution means is multiplied by an altimetric correction coefficient as a function of the atmospheric pressure ; the comparison means comprise means for comparing the volume flow rate determined with a low volume flow rate threshold value to allow the determination of the state of the depollution means only if the determined volume flow rate is greater than the value. low threshold; the comparison means comprise means for validating the state if the latter is maintained for a period of time greater than a predetermined period of confirmation time;
- les moyens de dépollution comprennent un filtre à particules ;the depollution means comprise a particulate filter;
- le filtre à particules est catalysé ; - les moyens de dépollution comprennent un piège à NOx ;the particulate filter is catalyzed; the depollution means comprise a NOx trap;
- le carburant comporte un additif destiné à se déposer avec des parti¬ cules auxquelles il est mélangé, sur les moyens de dépollution pour faciliter leur régénération ;the fuel comprises an additive intended to be deposited with parti¬ cules to which it is mixed, on the means of depollution to facilitate their regeneration;
- les moyens de dépollution sont imprégnés avec une formulation SCR, assurant une fonction d'oxydation CO/HC ;the depollution means are impregnated with an SCR formulation, ensuring a CO / HC oxidation function;
- le carburant comporte un additif formant piège à NOx ; etthe fuel comprises an additive forming a NOx trap; and
- le moteur est associé à un turbocompresseur.the engine is associated with a turbocharger.
L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, sur lesquels :The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the appended drawings, in which:
- la Fig.1 représente un schéma synoptique illustrant la structure géné¬ rale et le fonctionnement d'un moteur équipé de moyens de dépollution ;FIG. 1 represents a block diagram illustrating the general structure and operation of an engine equipped with depollution means;
- la Fig.2 représente un schéma synoptique illustrant la structure géné¬ rale et le fonctionnement d'un système d'évaluation selon l'invention ; - la Fig.3 représente un abaque prédéterminé d'états des moyens de dépollution ; etFIG. 2 represents a block diagram illustrating the general structure and operation of an evaluation system according to the invention; FIG. 3 represents a predetermined abacus of states of the depollution means; and
- les Figs.4 et 5 illustrent deux variantes de réalisation de moyens de détermination du débit volumique des gaz en amont des moyens de dépollution.FIGS. 4 and 5 illustrate two alternative embodiments of means for determining the volume flow rate of the gases upstream of the depollution means.
On a en effet illustré sur la figure 1 , des moyens de dépollution qui sont désignés par la référence générale 1 et qui sont intégrés dans une ligne d'échappement 2 d'un moteur 3 de véhicule automobile.It has indeed been shown in Figure 1, the pollution control means which are designated by the general reference 1 and which are integrated in an exhaust line 2 of a motor vehicle engine 3.
Le moteur peut par exemple être un moteur Diesel de véhicule auto¬ mobile, les moyens de dépollution comprenant par exemple un filtre à particules
ou autres, associé à des moyens formant catalyseur d'oxydation ou autres, comme cela est déjà connu dans l'état de la technique.The engine may for example be a diesel engine of an auto-mobile vehicle, the pollution control means comprising for example a particulate filter or others, associated with oxidation catalyst means or the like, as already known in the state of the art.
Ce moteur est associé à des moyens à rampe commune d'alimentation en carburant, désignés par la référence générale 4 sur cette figure, adaptés pour mettre en œuvre, sous le contrôle par exemple d'un calculateur désigné par la référence générale 5, des stratégies de régénération des moyens de dépollution en utilisant des post-injections de carburant dans les cylindres du moteur.This engine is associated with common rail fuel supply means, designated by the general reference 4 in this figure, adapted to implement, under the control of for example a calculator designated by the general reference 5, strategies regeneration of the depollution means by using post-injections of fuel in the engine cylinders.
Ces différentes stratégies sont par exemple stockées dans des moyens de mémorisation désignés par la référence générale 6 et associés au calculateur 5.These different strategies are for example stored in storage means designated by the general reference 6 and associated with the computer 5.
Ce calculateur comporte également des moyens d'évaluation de l'état de charge des moyens de dépollution.This calculator also comprises means for evaluating the state of charge of the depollution means.
En effet, et comme cela est illustré sur la figure 2, ce calculateur intè- gre des moyens de détermination de la pression différentielle aux bornes des moyens de dépollution, ou de la pression absolue en amont des moyens de dé¬ pollution, désignés par la référence générale 7 sur cette figure 2 et des moyens de détermination du débit volumique des gaz en amont de ces moyens de dépol¬ lution, ces moyens étant désignés par la référence générale 8. De plus, le calculateur comporte des moyens de définition d'un point d'état des moyens de dépollution à partir de ce débit volumique et de cette pres¬ sion différentielle, désignés par la référence générale 9 et des moyens 10 de comparaison du point d'état ainsi défini des moyens de dépollution, à un abaque prédéterminé d'états absent, surchargé ou colmaté de ces moyens de dépollu- tion, cet abaque étant par exemple stocké dans des moyens de mémorisation désignés par la référence générale 11.Indeed, and as illustrated in FIG. 2, this calculator includes means for determining the differential pressure at the terminals of the depollution means, or the absolute pressure upstream of the pollution control means, designated by the general reference 7 in this figure 2 and means for determining the volume flow rate of the gases upstream of these depol¬ lution means, these means being designated by the general reference 8. In addition, the calculator comprises means for defining a state point of the depollution means from this volume flow rate and this differential pres¬ tion, designated by the general reference 9 and means 10 for comparing the state point and defined means of pollution control, to a predetermined abacus state of absence, overloaded or clogged with these depollution means, this abacus being for example stored in storage means designated by the general reference 11.
Par comparaison du point d'état défini à cet abaque prédéterminé d'états, il est alors possible au calculateur 5 par exemple, de délivrer une infor¬ mation de moyens de dépollution absents, surchargés ou colmatés. Ceci est en effet illustré sur la figure 3, qui représente un exemple de réalisation d'un tel abaque où en fonction de la position du point d'état sur cet abaque, il est possible de déterminer l'état de ces moyens de dépollution en sur¬ veillant la contre-pression à l'échappement.
C'est ainsi par exemple que l'on peut utiliser un capteur de pression différentielle aux bornes des moyens de dépollution.By comparison of the state point defined with this predetermined abacus of states, it is then possible for the computer 5, for example, to deliver an information of depollution means that are absent, overloaded or clogged. This is indeed illustrated in FIG. 3, which represents an embodiment of such an abacus where, as a function of the position of the state point on this chart, it is possible to determine the state of these depollution means by monitoring the exhaust back pressure. For example, it is possible to use a differential pressure sensor at the terminals of the depollution means.
Dans ce cas, et comme cela est illustré sur la figure 4, les moyens de détermination de la masse volumique 8 reçoivent en entrée la température des gaz en amont du filtre à particules, à partir d'un capteur désigné par la référence générale 12 sur cette figure, la pression différentielle à partir d'un capteur dési¬ gné par la référence générale 13, la pression atmosphérique mesurée à partir d'un capteur désigné par la référence générale 14 et une information de débit de masse de gaz traversant ces moyens de dépollution, à partir de moyens de dé- termination correspondants désignés par la référence générale 15.In this case, and as illustrated in FIG. 4, the density determination means 8 receive as input the temperature of the gases upstream of the particulate filter, from a sensor designated by the general reference 12 on this figure, the differential pressure from a sensor designated by the general reference 13, the atmospheric pressure measured from a sensor designated by the general reference 14 and a gas mass flow rate information passing through these means of decontamination, from corresponding determination means designated by general reference 15.
Dans ce cas, le débit volumique est calculé selon la relation suivante :In this case, the volume flow is calculated according to the following relation:
Qvoi=(R*(AT2 + 273.15) / (ΔP + P atmo)* Débit masse air) dans laquelle QVOι représente le débit volumique, R est une constante, AT2 est la température des gaz en amont des moyens de dépollution, ΔP est la pression différentielle aux bornes des moyens de dépollution, Patmo est la pres¬ sion atmosphérique et débit masse air est le débit des gaz traversant les moyens de dépollution.Qv o i = (R * (AT2 + 273.15) / (ΔP + P atmo) * Air mass flow rate) in which Q VO ι represents the volume flow rate, R is a constant, AT2 is the temperature of the gases upstream of the means of depollution, ΔP is the differential pressure at the terminals of the pollution control means, Patmo is the atmospheric pres¬ sion and air mass flow rate is the flow of gas passing through the means of depollution.
Cependant, un capteur de pression absolue en amont des moyens de dépollution peut également être envisagé. Dans ce cas, et comme cela est représenté sur la figure 5, les moyens de détermination de la masse volumique 8 reçoivent alors en entrée, la tempéra¬ ture des gaz en amont du filtre à particules à partir du capteur 12, le débit de masse d'air traversant les moyens de dépollution à partir des moyens de déter¬ mination 15, et la pression absolue des gaz en entrée des moyens de dépollution à partir d'un capteur correspondant désignés par la référence générale 16.However, an absolute pressure sensor upstream of the depollution means can also be envisaged. In this case, and as shown in FIG. 5, the density determination means 8 then receive, at the inlet, the temperature of the gases upstream of the particulate filter from the sensor 12, the mass flow rate. of air passing through the means of decontamination from the means of determination 15, and the absolute pressure of the gases at the inlet of the depollution means from a corresponding sensor designated by the general reference 16.
Ainsi, les moyens de détermination 8 peuvent déterminer le débit vo¬ lumique par la relation suivante :Thus, the determining means 8 can determine the volumetric flow rate by the following relation:
Qvoi=(R*(AT2 + 273.15) / P4* Débit masse air) dans laquelle QVOι représente le débit volumique, R est une constante, AT2 est la température des gaz en amont du filtre à particules, P4 est la pression absolue en entrée des moyens de dépollution et débit masse air est le débit des gaz traversant les moyens de dépollution.Q vo i = (R * (AT2 + 273.15) / P4 * Air mass flow rate) in which Q VO ι represents the volume flow rate, R is a constant, AT2 is the gas temperature upstream of the particulate filter, P4 is the absolute pressure at the inlet of the pollution control means and air mass flow rate is the flow rate of the gases passing through the depollution means.
L'abaque présente alors trois courbes, respectivement C Absent, C Surchargé, C Colmaté, qui permettent respectivement de détecter la présence ou
l'absence des moyens de dépollution, un état colmaté des moyens de dépollution permettant d'assurer la protection du moteur et un état surchargé des moyens de dépollution sécurisant l'indicateur de charge issu par exemple d'autres modules de détermination de charge de ces moyens de dépollution en cas de dérive de ceux-ci et assurant ainsi la protection des moyens de dépollution vis-à-vis des températures de régénération trop critiques.The abacus then has three curves, respectively C Absent, C Overloaded, C Plugged, which respectively enable the presence or the absence of the depollution means, a clogged state of the pollution control means making it possible to ensure the protection of the engine and an overloaded state of the depollution means securing the charge indicator coming for example from other charge determination modules of these depollution means in case of drift thereof and thus ensuring the protection of the depollution means vis-à-vis too critical regeneration temperatures.
La détermination de l'état de charge peut bien entendu être soumise à une condition de maintien de cet état pendant un temps de confirmation d'état prédéterminé.The determination of the state of charge can of course be subject to a condition of maintaining this state during a predetermined state confirmation time.
Ainsi Si 0 <(Qvol, ΔP) < C AbsentSo Si 0 <(Qvol, ΔP) <C Absent
Pour un temps supérieur à temps confirmation étatFor a longer time confirmation state
Alors l'état du FAP est absent ou Etat FAP = 25%Then the state of the FAP is absent or State FAP = 25%
Si C Absent <(Qvol, ΔP) < C SurchargéIf C Absent <(Qvol, ΔP) <C Overloaded
Pour un temps supérieur à temps confirmation étatFor a longer time confirmation state
Ou si RestEtatFAP=1Or if RestEtatFAP = 1
Alors l'état du FAP est normal ou Etat FAP = 0%Then the state of the FAP is normal or State FAP = 0%
Si C Surchargé<(Qvol, ΔP) > C ColmatéIf C Overloaded <(Qvol, ΔP)> C Clogged
Pour un temps supérieur à temps confirmation étatFor a longer time confirmation state
Alors l'état du FAP est surchargé ou Etat FAP = 75%Then the state of the FAP is overloaded or State FAP = 75%
Si (Qvol, ΔP) < C ColmatéIf (Qvol, ΔP) <C Clogged
Pour un temps supérieur à temps confirmation étatFor a longer time confirmation state
Alors l'état du FAP est colmaté ou Etat FAP = 100%Then the state of the FAP is clogged or state FAP = 100%
L'état des moyens de dépollution doit bien entendu être mémorisé à chaque coupure d'alimentation du calculateur 5.The state of the depollution means must of course be memorized at each power failure of the computer 5.
Différentes fonctions supplémentaires peuvent être envisagées. Ainsi par exemple, afin d'obtenir une précision satisfaisante et éviter les fausses détections, la courbe C Absent peut par exemple être multipliée par
un coefficient de correction altimétrique en fonction de la pression atmosphéri¬ que.Various additional functions can be envisaged. For example, in order to obtain a satisfactory accuracy and avoid false detections, the Absent C curve can for example be multiplied by an altimetric correction coefficient as a function of the atmospheric pressure.
Pour éviter les fausses détections, la détection des différents états peut également être soumise à une comparaison du débit volumique déterminé à une valeur de seuil bas de débit volumique, ce seuil étant par exemple calibrable. Ainsi, les moyens de comparaison 10 peuvent également être adaptés pour comparer le débit volumique déterminé à cette valeur de seuil limite bas ca¬ librable, pour n'autoriser la détermination de l'état des moyens de dépollution que si le débit volumique déterminé est supérieur à la valeur de seuil bas. Des conditions supplémentaires peuvent également être fixées pour la détection de l'absence des moyens de dépollution.To avoid false detections, the detection of the different states can also be subjected to a comparison of the volume flow rate determined with a low threshold value of volume flow, this threshold being for example calibratable. Thus, the comparison means 10 can also be adapted to compare the determined volume flow rate with this low limit threshold value ca¬ librable, to allow the determination of the state of the pollution control means only if the determined volume flow is higher at the low threshold value. Additional conditions may also be set for detecting the absence of the depollution means.
Ainsi par exemple, si un capteur de pression différentielle est utilisé, il convient que la phase d'apprentissage de l'offset de celui-ci, soit terminée, que le débit des post-injections soit nul depuis une durée minimale prédéterminée et qu'un compteur de temps autorise la détection d'un tel état.For example, if a differential pressure sensor is used, the learning phase of the offset of the latter must be completed, the rate of the post-injections must be zero for a predetermined minimum duration and that a time counter allows the detection of such a state.
Les différentes courbes d'état mentionnées précédemment peuvent être calibrées selon une méthodologie analogue.The various state curves mentioned above can be calibrated according to a similar methodology.
Ainsi par exemple, la courbe C Absent peut être obtenue par caracté- risation sur banc-moteur d'un ensemble catalyseur + FAP en l'absence de FAP. La courbe est alors construite en relevant les différentes valeurs de ΔP en fonction de Q vol.Thus, for example, the Absent C curve can be obtained by characterization on a motor bed of a catalyst + FAP assembly in the absence of FAP. The curve is then constructed by taking the different values of ΔP according to Q vol.
Pour la courbe C Colmaté, on peut par exemple charger un filtre à par¬ ticules en suies, jusqu'à atteindre la valeur ΔP maximale, c'est-à-dire une valeur limite admissible avant la réouverture des soupapes d'échappement du moteur. La courbe C Surchargé peut quant à elle être, par exemple, une trans¬ position de la courbe C Colmaté.For the C-shaped clogged curve, it is possible, for example, to load a sooty par¬ particle filter until the maximum value ΔP is reached, that is to say a permissible limit value before the reopening of the engine exhaust valves. . Curve C overloaded can be, for example, a trans¬ position of the C-shaped curve.
Bien entendu, d'autres modes de réalisation encore peuvent être envi¬ sagés.Of course, other embodiments may be envi¬ sages.
En particulier, différents modes de réalisation des moyens de dépollu- tion peuvent être prévus.In particular, various embodiments of the depollution means may be provided.
Ainsi, par exemple, les moyens de dépollution et les moyens formant catalyseur d'oxydation peuvent être intégrés dans un seul et même élément, no¬ tamment sur un même substrat.
A titre d'exemple, un filtre à particules intégrant la fonction d'oxydation peut être envisagé.Thus, for example, the depollution means and the oxidation catalyst means may be integrated into one and the same element, in particular on the same substrate. By way of example, a particulate filter incorporating the oxidation function can be envisaged.
Ces moyens de dépollution peuvent également être imprégnés avec une formulation SCR assurant une fonction d'oxydation CO/HC de façon classi- que.These depollution means may also be impregnated with a SCR formulation providing a CO / HC oxidation function in a conventional manner.
De même, un piège à NOx intégrant une fonction d'oxydation peut également être envisagé, que celui-ci soit additivé ou non.Similarly, a NOx trap incorporating an oxidation function can also be envisaged, whether or not it is additive.
Cette fonction d'oxydation et/ou de piège à NOx peut être remplie par exemple par un additif mélangé au carburant. Dans ce cas, le carburant peut en effet comporter un additif destiné à se déposer avec les particules auxquelles il est mélangé, sur les moyens de dé¬ pollution, pour faciliter leur régénération.This oxidation function and / or NOx trap can be filled for example by an additive mixed with the fuel. In this case, the fuel may in fact comprise an additive intended to be deposited with the particles to which it is mixed on the means of pollution, to facilitate their regeneration.
De même, le moteur peut être associé ou non à un turbocompresseur.
Similarly, the engine may or may not be associated with a turbocharger.
Claims
1. Système d'évaluation de l'état de charge de moyens de dépollution (1 ) intégrés dans une ligne d'échappement (2) d'un moteur (3) de véhicule auto¬ mobile, caractérisé en ce qu'il comporte des moyens (7) de détermination d'une pression au niveau des moyens de dépollution (1 ), des moyens de détermination (8) du débit volumique des gaz en amont de ces moyens de dépollution (1) et des moyens (10) de comparaison du point d'état des moyens de dépollution, défini par la pression et le débit volumique ainsi déterminés, à un abaque prédéterminé d'états absent, surchargé et colmaté des moyens de dépollution (1 ) pour évaluer l'état de ceux-ci.1. System for evaluating the state of charge of depollution means (1) integrated in an exhaust line (2) of an engine (3) of an auto-mobile vehicle, characterized in that it comprises means (7) for determining a pressure at the level of the depollution means (1), means (8) for determining the volume flow rate of the gases upstream of these depollution means (1) and means (10) for comparison the state point of the depollution means, defined by the pressure and the volume flow rate thus determined, to a predetermined abacus of absent, overloaded and clogged states of the pollution control means (1) for evaluating the state thereof.
2. Système selon la revendication 1 , caractérisé en ce que la pression est une pression différentielle aux bornes des moyens de dépollution et le débit volumique en amont des moyens de dépollution (1) est déterminé selon la rela¬ tion suivante : Qvoi=(R*(AT2 + 273.15) / (ΔP + P atmo)* Débit masse air) dans laquelle QVOι représente le débit volumique, R est une constante, AT2 est la température des gaz en amont des moyens de dépollution, ΔP est la pression différentielle aux bornes de ces moyens de dépollution, délivrée par un capteur de pression différentielle, Patmo est la pression atmosphérique et débit masse air est le débit des gaz traversant les moyens de dépollution.2. System according to claim 1, characterized in that the pressure is a differential pressure across the pollution control means and the volume flow upstream of the pollution control means (1) is determined according to the following rela¬ tion: Qv o i = (R * (AT2 + 273.15) / (ΔP + P atmo) * Air mass flow rate) in which Q VO ι represents the volume flow rate, R is a constant, AT2 is the temperature of the gases upstream of the depollution means, ΔP is the differential pressure at the terminals of these depollution means, delivered by a differential pressure sensor, Patmo is the atmospheric pressure and air mass flow rate is the flow rate of the gases passing through the depollution means.
3. Système selon la revendication 1 , caractérisé en ce que la pression est une pression absolue en amont des moyens de dépollution et le débit volumi¬ que en amont des moyens de dépollution (1) est déterminé selon la rela¬ tion suivante : Qvoi=(R*(AT2 + 273.15) / P4* Débit masse air) dans laquelle QVOι représente le débit volumique, R est une constante, AT2 représente la température des gaz en amont des moyens de dépollution, P4 est la pression absolue des gaz délivrée par un capteur de pression absolue en entrée des moyens de dépollution, et débit masse air est le débit des gaz traver- sant les moyens de dépollution.3. System according to claim 1, characterized in that the pressure is an absolute pressure upstream of the pollution control means and volumi¬ flow upstream of the pollution control means (1) is determined according to the following rela¬ tion: Qv o i = (R * (AT2 + 273.15) / P4 * Air mass flow rate) in which Q VO ι represents the volume flow rate, R is a constant, AT2 represents the temperature of the gases upstream of the pollution control means, P4 is the absolute pressure gas delivered by an absolute pressure sensor at the inlet of the pollution control means, and air mass flow rate is the flow rate of the gases passing through the pollution control means.
4. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que les états des moyens de dépollution (1 ) sont définis par des courbes d'état absent, d'état surchargé et d'état colmaté, dont la courbe d'état absent des moyens de dépollution est multipliée par un coefficient de cor¬ rection altimétrique en fonction de la pression atmosphérique.4. System according to any one of the preceding claims, characterized in that the states of the pollution control means (1) are defined by absentee state curves, overloaded state and clogged state, whose curve the state of absence of the pollution control means is multiplied by an altimetric correction coefficient as a function of the atmospheric pressure.
5. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de comparaison (10) comprennent des moyens de comparaison du débit volumique déterminé à une valeur de seuil bas de débit volumique pour n'autoriser la détermination de l'état des moyens de dépollution (1 ) que si le débit volumique déterminé est supérieur à la valeur de seuil bas.5. System according to any one of the preceding claims, characterized in that the comparison means (10) comprises means for comparing the volume flow rate determined with a low threshold value of volume flow rate to allow the determination of the state of the pollution control means (1) if the determined volume flow rate is greater than the low threshold value.
6. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de comparaison (10) comprennent des moyens de validation de l'état si celui-ci est maintenu pendant une période de temps su¬ périeure à une période de temps de confirmation prédéterminée.6. System according to any one of the preceding claims, characterized in that the comparison means (10) comprise means for validating the state if it is maintained for a period of time greater than a period of time. predetermined confirmation time.
7. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de dépollution (1 ) comprennent un filtre à parti¬ cules. 7. System according to any one of the preceding claims, characterized in that the pollution control means (1) comprise a particulate filter.
8. Système selon la revendication 7, caractérisé en ce que le filtre à particules est catalysé.8. System according to claim 7, characterized in that the particulate filter is catalyzed.
9. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de dépollution comprennent un piège à NOx.9. System according to any one of the preceding claims, characterized in that the pollution control means comprise a NOx trap.
10. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que le carburant comporte un additif destiné à se déposer avec des particules auxquelles il est mélangé, sur les moyens de dépollution pour faci¬ liter leur régénération.10. System according to any one of the preceding claims, characterized in that the fuel comprises an additive intended to be deposited with particles to which it is mixed, on the depollution means to faci¬ bed their regeneration.
11. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de dépollution (1 ) sont imprégnés avec une formulation SCR assurant une fonction d'oxydation CO/HC.11. System according to any one of the preceding claims, characterized in that the pollution control means (1) are impregnated with a formulation SCR ensuring a CO / HC oxidation function.
12. Système selon l'une quelconque des revendications 1 à 9, caracté¬ risé en ce que le carburant comporte un additif formant piège à NOx.12. System according to any one of claims 1 to 9, caracté¬ ized in that the fuel comprises a NOx trap additive.
13. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que le moteur (3) est associé à un turbocompresseur. 13. System according to any one of the preceding claims, characterized in that the engine (3) is associated with a turbocharger.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR0406865A FR2872212B1 (en) | 2004-06-23 | 2004-06-23 | SYSTEM FOR EVALUATING THE STATE OF CHARGE OF DEPOLLUTION MEANS OF AN EXHAUST LINE |
PCT/FR2005/050477 WO2006005875A1 (en) | 2004-06-23 | 2005-06-22 | System for evaluating the charge state of an exhaust line depollution means |
Publications (1)
Publication Number | Publication Date |
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EP1766213A1 true EP1766213A1 (en) | 2007-03-28 |
Family
ID=34947172
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Application Number | Title | Priority Date | Filing Date |
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EP05781810A Withdrawn EP1766213A1 (en) | 2004-06-23 | 2005-06-22 | System for evaluating the charge state of an exhaust line depollution means |
Country Status (4)
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US (1) | US7824481B2 (en) |
EP (1) | EP1766213A1 (en) |
FR (1) | FR2872212B1 (en) |
WO (1) | WO2006005875A1 (en) |
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FR2872214B1 (en) | 2004-06-23 | 2006-11-03 | Peugeot Citroen Automobiles Sa | SYSTEM FOR MONITORING THE REGENERATION OF MEANS OF DEPOLLUTION |
FR2872213B1 (en) * | 2004-06-23 | 2006-11-03 | Peugeot Citroen Automobiles Sa | EMERGENCY MEANS REGENERATION SYSTEM FOR MOTOR VEHICLE ENGINE |
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EP1854971B1 (en) * | 2006-05-09 | 2009-08-05 | Ford Global Technologies, LLC | Method and apparatus for the estimation of the particle filter loading |
FR2908822A1 (en) * | 2006-11-17 | 2008-05-23 | Saint Gobain Ct Recherches | METHOD OF CALIBRATING AND MANAGING AN EXHAUST LINE COMPRISING A PARTICLE FILTER |
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- 2005-06-22 EP EP05781810A patent/EP1766213A1/en not_active Withdrawn
- 2005-06-22 US US11/571,260 patent/US7824481B2/en not_active Expired - Fee Related
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CN105977553A (en) * | 2016-02-29 | 2016-09-28 | 上海煦达新能源科技有限公司 | Network-level bidirectional energy storage supervisory platform for gradient reuse of electric vehicle retired battery |
CN105977553B (en) * | 2016-02-29 | 2019-03-29 | 上海煦达新能源科技有限公司 | The retired battery echelon multiplexed network grade bidirectional energy-storage supervising platform of electric car |
Also Published As
Publication number | Publication date |
---|---|
FR2872212A1 (en) | 2005-12-30 |
WO2006005875A1 (en) | 2006-01-19 |
US7824481B2 (en) | 2010-11-02 |
FR2872212B1 (en) | 2006-11-03 |
US20070157818A1 (en) | 2007-07-12 |
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