FR2897647A1 - Catalytic particle filter regeneration system for e.g. diesel engine, has module to control fuel quantity so that catalyzer`s temperature is less than limit temperature, and with calculation module calculating fuel quantity to be injected - Google Patents

Catalytic particle filter regeneration system for e.g. diesel engine, has module to control fuel quantity so that catalyzer`s temperature is less than limit temperature, and with calculation module calculating fuel quantity to be injected Download PDF

Info

Publication number
FR2897647A1
FR2897647A1 FR0601418A FR0601418A FR2897647A1 FR 2897647 A1 FR2897647 A1 FR 2897647A1 FR 0601418 A FR0601418 A FR 0601418A FR 0601418 A FR0601418 A FR 0601418A FR 2897647 A1 FR2897647 A1 FR 2897647A1
Authority
FR
France
Prior art keywords
temperature
fuel
oxidation catalyst
inlet
particle filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR0601418A
Other languages
French (fr)
Other versions
FR2897647B1 (en
Inventor
Marc Daneau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Original Assignee
Renault SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Priority to FR0601418A priority Critical patent/FR2897647B1/en
Publication of FR2897647A1 publication Critical patent/FR2897647A1/en
Application granted granted Critical
Publication of FR2897647B1 publication Critical patent/FR2897647B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • 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
    • F01N2900/0408—Methods of control or diagnosing using a feed-back loop
    • 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
    • F01N2900/0412—Methods of control or diagnosing using pre-calibrated maps, tables or charts
    • 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
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
    • F01N2900/1404—Exhaust gas temperature
    • 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
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • F01N2900/1602—Temperature of exhaust gas apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1413—Controller structures or design
    • F02D2041/1418—Several control loops, either as alternatives or simultaneous
    • 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

Landscapes

  • 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)

Abstract

The system has a temperature measurement sensor (17) that is placed in an inlet of an oxidation catalyzer (4) and connected to an electronic control unit (11) by using a connection (18). The sensor determines a temperature (TECOX) in the inlet of the oxidation catalyzer. A control module (15) controls quantity of fuel injected by a fuel injector such that an internal temperature of the catalyzer is less than a limit temperature. The module (15) comprises a calculation module (16) calculating a fuel quantity to be injected into an exhaust line, based on the inlet`s temperature. An independent claim is also included for a method of regenerating a catalytic particle filter, that is situated in an exhaust line of an internal combustion engine of a motor vehicle.

Description

1 Système et procédé de régénération d'un filtre à particules catalytique1 System and method for regeneration of a catalytic particle filter

situé dans la ligne d'échappement d'un moteur diesel  located in the exhaust line of a diesel engine

La présente invention concerne un système et un procédé de régénération d'un filtre à particules catalytique situé dans la ligne d'échappement d'un moteur diesel. Un filtre à particules catalytique capture des particules de suies émises par le moteur. Pour éviter un colmatage du filtre, des phases périodiques de régénération permettent de brûler les particules piégées. Les particules piégées sont brûlées par élévation de la température des gaz d'échappement. Il existe des systèmes de régénération de filtre à particules catalytique par injection de carburant à l'échappement, par exemple tel que décrit dans la demande de brevet français déposée sous le numéro 04 53 187 (RENAULT). L'injection de carburant est effectuée par un injecteur situé dans la ligne d'échappement d'un moteur diesel, en amont du filtre à particules catalytique. Cette injection de carburant entraîne une production de chaleur dans le catalyseur d'oxydation du filtre à particules catalytique. Cette chaleur permet d'atteindre en sortie du catalyseur d'oxydation, ou en entrée du filtre à particules, une température de l'ordre de 650 C nécessaire à la combustion des particules lors de phases de régénération. Cependant, lors d'une augmentation rapide de la charge du moteur, la température en entrée du catalyseur d'oxydation augmente très vite, ainsi que la température interne du catalyseur d'oxydation. Or, lorsque la température du catalyseur d'oxydation dépasse une température de l'ordre de 800 C, le catalyseur se dégrade très rapidement.  The present invention relates to a system and method for regenerating a catalytic particle filter located in the exhaust line of a diesel engine. A catalytic particle filter captures soot particles emitted by the engine. To prevent clogging of the filter, periodic regeneration phases make it possible to burn the trapped particles. The trapped particles are burned by raising the temperature of the exhaust gas. There exist catalytic particle filter regeneration systems by fuel injection exhaust, for example as described in the French patent application filed under number 04 53 187 (RENAULT). The fuel injection is performed by an injector located in the exhaust line of a diesel engine, upstream of the catalytic particle filter. This fuel injection results in heat generation in the oxidation catalyst of the catalytic particle filter. This heat makes it possible to reach, at the outlet of the oxidation catalyst, or at the inlet of the particulate filter, a temperature of the order of 650 ° C necessary for the combustion of the particles during regeneration phases. However, during a rapid increase in the engine load, the inlet temperature of the oxidation catalyst increases very rapidly, as well as the internal temperature of the oxidation catalyst. However, when the temperature of the oxidation catalyst exceeds a temperature of the order of 800 C, the catalyst degrades very rapidly.

2 Aussi, un but de l'invention est d'éviter une telle dégradation du catalyseur d'oxydation. Ainsi, selon un aspect de l'invention, il est proposé un système de régénération d'un filtre à particules catalytique, comprenant un catalyseur d'oxydation disposé en amont d'un filtre à particules, et situé dans la ligne d'échappement d'un moteur diesel de véhicule automobile, comprenant une unité de commande électronique et un injecteur de carburant commandé, disposé en amont du filtre à particules catalytique et alimenté en carburant par une pompe commandée. Le système comprend des moyens de détermination de la température TECOX en entrée dudit catalyseur d'oxydation, et des moyens de commande de la quantité de carburant injectée par ledit injecteur de manière à ce que la température interne dudit catalyseur d'oxydation reste inférieure à une température limite Tlim11e, lesdits moyens de commande comprenant des moyens de calcul de ladite quantité de carburant à injecter en fonction de la température TECOX en entrée dudit catalyseur d'oxydation. Ainsi, on évite d'atteindre une température telle que le 20 catalyseur d'oxydation se dégrade. Selon un mode de réalisation, le système comprend, en outre, des moyens de détermination de la température TEFAP en entrée dudit filtre à particules, et des moyens de régulation de la température TEFAP en entrée dudit filtre à particules. Lesdits moyens de calcul 25 utilisent, en outre, une valeur de fraction massique de carburant dans les gaz traversant ledit filtre à particules catalytique, délivrée par lesdits moyens de régulation.  Also, an object of the invention is to avoid such degradation of the oxidation catalyst. Thus, according to one aspect of the invention, there is provided a regeneration system of a catalytic particle filter, comprising an oxidation catalyst arranged upstream of a particulate filter, and located in the exhaust line of a motor vehicle diesel engine comprising an electronic control unit and a controlled fuel injector disposed upstream of the catalytic particle filter and supplied with fuel by a controlled pump. The system comprises means for determining the TECOX temperature at the inlet of said oxidation catalyst, and means for controlling the quantity of fuel injected by said injector so that the internal temperature of said oxidation catalyst remains below one limiting temperature Tlim11e, said control means comprising means for calculating said quantity of fuel to be injected as a function of the TECOX temperature at the inlet of said oxidation catalyst. Thus, it is avoided to reach a temperature such that the oxidation catalyst is degraded. According to one embodiment, the system further comprises means for determining the TEFAP temperature at the inlet of said particulate filter, and temperature regulating means TEFAP at the inlet of said particulate filter. Said calculation means 25 also use a fuel mass fraction value in the gas flowing through said catalytic particle filter delivered by said regulating means.

3 Dans un mode de réalisation, lesdits moyens de calcul utilisent, en outre, une température de référence Tnominale en entrée du catalyseur d'oxydation. Selon un mode de réalisation, lesdits moyens de calcul utilisent, en outre, une valeur de référence de fraction massique de carburant dans les gaz traversant ledit filtre à particules catalytique, par degré Celsius. Dans un mode de réalisation, lesdits moyens de calcul utilisent, en outre, une cartographie d'une fraction massique en carburant dans les gaz traversant ledit filtre à particules catalytique, en fonction de la température TEFAPb en entrée dudit filtre à particules à atteindre en fonctionnernent en boucle ouverte desdits moyens de régulation de la température en entrée dudit filtre à particules. Selon un mode de réalisation, lesdits moyens de calcul utilisent, en outre, une dérivée de fraction massique en carburant dans les gaz traversant ledit filtre à particules catalytique. Dans un mode de réalisation, lesdits moyens de calcul utilisent, en outre, une cartographie d'un gain de ladite dérivée de fraction massique en carburant dans les gaz traversant ledit filtre à particules catalytique en fonction du débit des gaz à l'échappement. Dans un mode de réalisation, ladite température limite Tiimi1e est de l'ordre de 800 C. Dans un mode de réalisation, lesdits moyens de détermination de la température TECOX en entrée dudit catalyseur d'oxydation, et lesdits moyens de détermination de la température en entrée dudit filtre à particules sont des capteurs de mesure de température. Selon un autre aspect de l'invention, il est également proposé un procédé de régénération d'un filtre à particules catalytique, comprenant un catalyseur d'oxydation disposé en amont d'un filtre à  In one embodiment, said calculating means further utilize a reference temperature Tnominal input of the oxidation catalyst. According to one embodiment, said calculation means also use a fuel mass fraction reference value in the gases passing through said catalytic particle filter, by degrees Celsius. In one embodiment, said calculation means furthermore use a mapping of a fuel mass fraction in the gases passing through said catalytic particle filter, as a function of the TEFAPb temperature at the inlet of said particulate filter to be reached in operation. in an open loop of said temperature control means at the input of said particulate filter. According to one embodiment, said calculation means furthermore use a fuel mass fraction derivative in the gases passing through said catalytic particle filter. In one embodiment, said calculation means furthermore use a mapping of a gain of said fuel mass fraction derivative in the gases passing through said catalytic particle filter as a function of the exhaust gas flow rate. In one embodiment, said temperature limit Tiimi1e is of the order of 800 C. In one embodiment, said TECOX temperature determination means input of said oxidation catalyst, and said means for determining the temperature in input of said particle filter are temperature measurement sensors. According to another aspect of the invention, there is also provided a method of regenerating a catalytic particle filter, comprising an oxidation catalyst arranged upstream of a filter with

4 particules, et situé dans la ligne d'échappement d'un moteur diesel de véhicule automobile. On détermine la température TECOX en entrée dudit catalyseur d'oxydation, et on commande une quantité de carburant injectée en amont dudit filtre à particules catalytique de manière à ce que la température interne dudit catalyseur d'oxydation reste inférüeure à une température limite Tiimite, en calculant ladite quantité de carburant à injecter en fonction de la température TECOX en entrée dudit catalyseur d'oxydation. D'autres buts, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante, de quelques exemples nullement limitatifs, et faite en référence aux dessins annexés, sur lesquels : - la figure 1 est un schéma synoptique d'un mode de réalisation d'un système selon un aspect de l'invention ; - la figure 2 est schéma synoptique d'un module de calcul selon un aspect de l'invention ; et - la figure 3 est un schéma synoptique d'un module de calcul selon un autre aspect de l'invention. Sur la figurel, la ligne d'échappement 1 d'un véhicule automobile équipé d'un moteur diesel, comprend un dispositif catalytique amont 2 d'oxydation des hydrocarbures et du monoxyde de carbone. La ligne d'échappement comprend également un filtre à particules catalytique 3, comprenant un catalyseur d'oxydation 4 et un filtre à particules 5. Un injecteur 6 pulvérise du carburant en amont du catalyseur d'oxydation 4. Le catalyseur d'oxydation 4 est sollicité périodiquement pendant les phases de régénération du filtre à particules 5 pour créer de la chaleur permettant la régénération du filtre à particules 5. L'injection de carburant par l'injecteur 6 permet de réchauffer les gaz d'échappement. L'injecteur 6 est alimenté en carburant par l'intermédiaire d'un conduit 7 reliant l'injecteur 6 à un réservoir de carburant 8. 5 Une pompe à carburant 9 permet de fournir du carburant sous pression à l'injecteur 6 par le conduit 7. L'injecteur 6, et la pompe 9 sont respectivement connectés à une unité de commande électronique 11 par des connexions 12 et 14. L'unité de commande électronique 11 comprend un module de commande 15 de la quantité de carburant injectée par l'injecteur 6, de manière à ce que la température interne dudit catalyseur d'oxydation 4 reste inférieure à une température limite Tiimite. De manière classique la température Tlimi1e est de l'ordre de 800 C.  4 particles, and located in the exhaust line of a motor vehicle diesel engine. The TECOX temperature at the inlet of said oxidation catalyst is determined, and a quantity of fuel injected upstream of said catalytic particle filter is controlled so that the internal temperature of said oxidation catalyst remains below a limiting temperature Tiimite, in calculating said quantity of fuel to be injected as a function of the TECOX temperature at the inlet of said oxidation catalyst. Other objects, features and advantages of the invention will appear on reading the following description, of some non-limiting examples, and with reference to the appended drawings, in which: FIG. 1 is a schematic block diagram of a mode embodiment of a system according to one aspect of the invention; FIG. 2 is a block diagram of a calculation module according to one aspect of the invention; and FIG. 3 is a block diagram of a calculation module according to another aspect of the invention. On the figurel, the exhaust line 1 of a motor vehicle equipped with a diesel engine comprises an upstream catalytic device 2 for oxidation of hydrocarbons and carbon monoxide. The exhaust line also comprises a catalytic particle filter 3, comprising an oxidation catalyst 4 and a particulate filter 5. An injector 6 sprays fuel upstream of the oxidation catalyst 4. The oxidation catalyst 4 is biased periodically during the regeneration phases of the particulate filter 5 to create heat for the regeneration of the particulate filter 5. The injection of fuel by the injector 6 allows to heat the exhaust gas. The injector 6 is fed with fuel through a conduit 7 connecting the injector 6 to a fuel tank 8. A fuel pump 9 can supply fuel under pressure to the injector 6 via the conduit 7. The injector 6, and the pump 9 are respectively connected to an electronic control unit 11 by connections 12 and 14. The electronic control unit 11 comprises a control module 15 of the quantity of fuel injected by the injector 6, so that the internal temperature of said oxidation catalyst 4 remains below a limit temperature Tiimite. In a conventional manner the Tlimi1e temperature is of the order of 800 C.

Le module de commande 15 comprend un module de calcul 16 pour calculer la quantité de carburant à injecter dans la ligne d'échappement en fonction de la température TECOX en entrée du catalyseur d'oxydation 4. La température TECOX en entrée du catalyseur d'oxydation 4 est mesurée au moyen d'un capteur 17 de mesure de température, disposé en entrée du catalyseur d'oxydation 4, et relié à l'unité de commande électronique 11 par une connexion 18. En outre, un capteur 19 de mesure de la température, disposé dans la ligne d'échappement 1 entre le catalyseur d'oxydation 4 et le filtre à particules 5, et relié à l'unité de commande électronique 11 par une connexion 20, permet de mesurer la température TEFAP en entrée du filtre à particules 5, ou, en d'autres termes, en sortie du catalyseur d'oxydation 4.  The control module 15 comprises a calculation module 16 for calculating the quantity of fuel to be injected into the exhaust line as a function of the TECOX temperature at the inlet of the oxidation catalyst 4. The TECOX temperature at the inlet of the oxidation catalyst 4 is measured by means of a temperature measurement sensor 17, placed at the inlet of the oxidation catalyst 4, and connected to the electronic control unit 11 by a connection 18. In addition, a sensor 19 for measuring the temperature temperature, arranged in the exhaust line 1 between the oxidation catalyst 4 and the particulate filter 5, and connected to the electronic control unit 11 by a connection 20, makes it possible to measure the TEFAP temperature at the inlet of the filter. particles 5, or, in other words, at the outlet of the oxidation catalyst 4.

6 L'unité de commande électronique 11 comprend également un module de régulation 21 de la température TEFAP en entrée du filtre à particules 5. Un tel module de régulation 21, fournit, par exemple, une valeur de fraction massique en carburant dans les gaz traversant le filtre à particules catalytique 3, en fonction de la différence entre la température TEFAP en entrée du filtre à particules 5 et une valeur de consigne. Sur la figure 2 est illustré un exemple de réalisation du module 10 de calcul 16. Un soustracteur 25 reçoit une température de référence Tnominale en entrée du catalyseur d'oxydation 4, et la température TECOX en entrée du catalyseur d'oxydation 4 transmise par le capteur de température 17. 15 Le soustracteur 25 délivre en sortie la différence entre la température de référence Tnominale et la température TECOX en entrée du catalyseur d'oxydation 4. La sortie du soustracteur 25 est transmise à un premier multiplicateur 26 qui reçoit également en entrée une valeur de 20 référence de fraction massique de carburant dans les gaz traversant ledit filtre à particules catalytique 3, par degré Celsius. Le multiplicateur 26 effectue le produit des valeurs reçues à ses deux entrées, et délivre le résultat en sortie, à destination d'un premier additionneur 27. 25 Le premier additionneur 27 reçoit, en outre, en entrée, une valeur de fraction massique en carburant dans les gaz traversant le filtre à particules catalytique 3, en fonction de la température TEFAPbo en entrée du filtre à particules 5 à atteindre en fonctionnement en  The electronic control unit 11 also comprises a regulation module 21 of the TEFAP temperature at the inlet of the particulate filter 5. Such a regulation module 21, for example, provides a fuel mass fraction value in the gases passing through. the catalytic particle filter 3, as a function of the difference between the TEFAP temperature at the inlet of the particulate filter 5 and a set value. FIG. 2 illustrates an exemplary embodiment of the calculation module 10. A subtracter 25 receives a reference temperature Tnominale at the inlet of the oxidation catalyst 4, and the TECOX temperature at the inlet of the oxidation catalyst 4 transmitted by the temperature sensor 17. The subtractor 25 outputs the difference between the reference temperature Tnominale and the TECOX temperature at the inlet of the oxidation catalyst 4. The output of the subtracter 25 is transmitted to a first multiplier 26 which also receives as input a fuel mass fraction reference value in the gas passing through said catalytic particle filter 3, per degree Celsius. The multiplier 26 effects the product of the values received at its two inputs, and delivers the result at the output to a first adder 27. The first adder 27 also receives, as input, a fuel mass fraction value. in the gases passing through the catalytic particle filter 3, as a function of the TEFAPbo temperature at the inlet of the particulate filter 5 to be reached in operation under

7 boucle ouverte desdits moyens de régulation 21 de la température en entrée dudit filtre à particules 5. Cette valeur de fraction massique est fournie par une cartographie mémorisée 28.  7 open loop of said regulation means 21 of the inlet temperature of said particulate filter 5. This mass fraction value is provided by a stored map 28.

Le premier additionneur 27 délivre en sortie une valeur de fraction massique, égale à la somme des valeurs de fractions massiques reçues en entrées, à destination d'un deuxième additionneur 29 Le deuxième additionneur 29 reçoit également, en entrée, une valeur de fraction massique de carburant dans les gaz traversant ledit filtre à particules catalytique 3, délivrée par lesdits moyens de régulation 21. Le deuxième additionneur 29 additionne les valeurs reçues sur ses entrées., et délivre en sortie une commande en fraction massique de carburant traversant le filtre à particules catalytique 3, qui est transformée en commande en quantité de carburant à injecter par l'injecteur 6 par un module de transformation 30. Sur la figure 3 est représenté un exemple de réalisation amélioré du module de calcul 16. Les éléments ayant des références communes avec des références de la figure 2 sont identiques à ceux de la figure 2. Ainsi, un module de dérivée 31 transforme le signal dupliqué de valeurs de fractions massiques en carburant délivré par le multiplicateur 26, en son signal de dérivée temporelle, et transmet ce signal dérivé à un deuxième multiplicateur 32.  The first adder 27 outputs a mass fraction value, equal to the sum of the mass fraction values received as inputs, to a second adder 29. The second adder 29 also receives, as input, a mass fraction value of fuel in the gas passing through said catalytic particle filter 3, delivered by said regulation means 21. The second adder 29 adds the values received on its inputs, and outputs a mass fraction control of fuel passing through the catalytic particle filter. 3, which is converted into a fuel quantity control to be injected by the injector 6 by a transformation module 30. FIG. 3 shows an improved embodiment of the calculation module 16. The elements having common references with references in FIG. 2 are identical to those of FIG. 2. Thus, a tran derivative module 31 transforms the duplicated signal of mass fraction values into fuel delivered by the multiplier 26, into its time derivative signal, and transmits this derivative signal to a second multiplier 32.

Le deuxième multiplicateur 32 reçoit, en outre, en entrée, une valeur de gain de dérivée fourni par une cartographie mémorisée 33. Le deuxième multiplicateur 32 effectue le produit des valeurs reçues sur ses entrées, et délivre, en sortie, le résultat à destination d'une entrée supplémentaire du premier additionneur 27.  The second multiplier 32 also receives, as input, a derivative gain value provided by a stored map 33. The second multiplier 32 performs the product of the values received on its inputs, and delivers, as output, the result intended for an additional input of the first adder 27.

8 Cette prise en compte de la dérivée temporelle d'un signal de fraction massique en carburant permet d'améliorer encore l'amortissement d'une variation rapide de la température TECOX en entrée du catalyseur d'oxydation 4.  This taking into account of the time derivative of a mass fractional fuel signal makes it possible to further improve the damping of a rapid variation of the TECOX temperature at the inlet of the oxidation catalyst 4.

Ainsi, l'invention permet d'éviter une dégradation rapide du catalyseur d'oxydation d'un filtre à particules catalytique lors de montées rapides en température en entrée et dans le catalyseur d'oxydation du filtre à particules catalytique.10  Thus, the invention makes it possible to avoid rapid degradation of the oxidation catalyst of a catalytic particle filter during rapid rise in temperature at the inlet and in the oxidation catalyst of the catalytic particle filter.

Claims (10)

REVENDICATIONS 1, Système de régénération d'un filtre à particules catalytique (3), comprenant un catalyseur d'oxydation (4) disposé en amont d'un filtre à particules (5), et situé dans la ligne d'échappement (1) d'un moteur diesel de véhicule automobile, comprenant une unité de commande électronique (11) et un injecteur de carburant commandé (6), disposé en amont du filtre à particules catalytique (3) et alimenté en carburant par une pompe commandée (9), caractérisé par le fait qu'il comprend des moyens (17) de détermination de la température TECOX en entrée dudit catalyseur d'oxydation (4), et des moyens de commande (15) de la quantité de carburant injectée par ledit injecteur (6) de manière à ce que la température interne dudit catalyseur d'oxydation (4) reste inférieure à une température limite Tiimite, lesdits moyens de commande (15) comprenant des moyens de calcul (16) de ladite quantité de carburant à injecter en fonction de la température TECOX en entrée dudit catalyseur d'oxydation (4).  1, Regeneration system for a catalytic particle filter (3), comprising an oxidation catalyst (4) arranged upstream of a particulate filter (5), and located in the exhaust line (1) of a motor vehicle diesel engine, comprising an electronic control unit (11) and a controlled fuel injector (6), arranged upstream of the catalytic particle filter (3) and supplied with fuel by a controlled pump (9), characterized in that it comprises means (17) for determining the TECOX temperature at the inlet of said oxidation catalyst (4), and control means (15) for the quantity of fuel injected by said injector (6) so that the internal temperature of said oxidation catalyst (4) remains below a limiting temperature Tiimite, said control means (15) comprising means (16) for calculating said quantity of fuel to be injected as a function of the TECOX temperature input dudi oxidation catalyst (4). 2. Système selon la revendication 1, comprenant, en outre, des moyens (19) de détermination de la température TEFAP en entrée dudit filtre à particules (5), et des moyens de régulation (21) de la température TEFAP en entrée dudit filtre à particules (21), dans lequel lesdits moyens de calcul (16) utilisent, en outre, une valeur de fraction massique de carburant dans les gaz traversant ledit filtre à particules catalytique (3), délivrée par lesdits moyens de régulation (21).  2. System according to claim 1, further comprising means (19) for determining the TEFAP temperature at the inlet of said particulate filter (5), and regulating means (21) for the TEFAP temperature at the inlet of said filter. particulate filter (21), wherein said calculating means (16) further utilizes a fuel mass fraction value in the gas passing through said catalytic particle filter (3), delivered by said regulating means (21). 3. Système selon la revendication 1 ou 2, dans lequel lesdits moyens de calcul (16) utilisent, en outre, une température de référence Tnominale en entrée du catalyseur d'oxydation (4). 10  3. System according to claim 1 or 2, wherein said calculating means (16) further use a reference temperature Tnominale input of the oxidation catalyst (4). 10 4. Système selon l'une quelconque des revendications précédentes, dans lequel lesdits moyens de calcul (16) utilisent, en outre, une valeur de référence de fraction massique de carburant dans les gaz traversant ledit filtre à particules catalytique, par degré Celsius.  4. System according to any one of the preceding claims, wherein said calculating means (16) further use a reference value of mass fraction of fuel in the gas passing through said catalytic particle filter, per degree Celsius. 5. Système selon l'une quelconque des revendications précédentes, dans lequel lesdits moyens de calcul (16) utilisent, en outre, une cartographie (28) d'une fraction massique en carburant dans les gaz traversant ledit filtre à particules catalytique (3) en fonction de la température TEFAPb en entrée dudit filtre à particules (5) à atteindre en fonctionnement en boucle ouverte desdits moyens de régulation (21) de la température en entrée dudit filtre à particules (5).  5. System according to any one of the preceding claims, wherein said calculating means (16) further use a mapping (28) of a mass fraction of fuel in the gas passing through said catalytic particle filter (3). as a function of the TEFAPb temperature at the inlet of said particulate filter (5) to be reached in open-loop operation of said regulating means (21) for the inlet temperature of said particulate filter (5). 6. Système selon l'une quelconque des revendications précédentes, dans lequel lesdits moyens de calcul (16) utilisent, en outre, une dérivée (31) de fraction massique en carburant dans les gaz traversant ledit filtre à particules catalytique (3).  6. System according to any one of the preceding claims, wherein said calculating means (16) further use a derivative (31) of fuel mass fraction in the gas passing through said catalytic particle filter (3). 7. Système selon la revendication 6, dans lequel lesdits moyens de calcul (16) utilisent, en outre, une cartographie (33) d'un gain de ladite dérivée de fraction massique en carburant dans les gaz traversant ledit filtre à particules catalytique (3) en fonction du débit des gaz à l'échappement.  The system of claim 6, wherein said calculating means (16) further utilizes a mapping (33) of a gain of said fuel mass fraction derivative in the gases passing through said catalytic particle filter (3). ) as a function of the exhaust gas flow rate. 8. Système selon l'une quelconque des revendications précédentes, dans lequel ladite température limite Tiimite est de l'ordre de 800 C.  8. System according to any one of the preceding claims, wherein said Tiimite limit temperature is of the order of 800 C. 9. Système selon la revendication 2, dans lequel lesdits moyens de détermination (17) de la température TECOX en entrée dudit catalyseur d'oxydation (4), et lesdits moyens de détermination (19) de la température en entrée dudit filtre à particules (5) sont des capteurs (17, 19) de mesure de température. 11  9. System according to claim 2, wherein said means for determining (17) the TECOX temperature at the inlet of said oxidation catalyst (4), and said means (19) for determining the inlet temperature of said particulate filter ( 5) are sensors (17, 19) for measuring temperature. 11 10. Procédé de régénération d'un filtre à particules catalytique (3), comprenant un catalyseur d'oxydation (4) disposé en amont d'un filtre à particules (5), et situé dans la ligne d'échappement (1) d'un moteur diesel de véhicule automobile, caractérisé par le fait qu'on détermine la température TECOX en entrée dudit catalyseur d'oxydation (4), et on commande une quantité de carburant injectée en amont dudit filtre à particules catalytique (3) de manière à ce que la température interne dudit catalyseur d'oxydation (4) reste inférieure à une température limite Tiimite, en calculant ladite quantité de carburant à injecter en fonction de la température TECOX en entrée dudit catalyseur d'oxydation (4).15  Process for the regeneration of a catalytic particle filter (3) comprising an oxidation catalyst (4) arranged upstream of a particulate filter (5) and located in the exhaust line (1) of a diesel engine of a motor vehicle, characterized in that the TECOX temperature is determined at the inlet of said oxidation catalyst (4), and a quantity of fuel injected upstream of said catalytic particle filter (3) is controlled in such a way the internal temperature of said oxidation catalyst (4) remains lower than a limiting temperature Tiimite, by calculating said quantity of fuel to be injected as a function of the TECOX temperature at the inlet of said oxidation catalyst (4).
FR0601418A 2006-02-17 2006-02-17 SYSTEM AND METHOD FOR REGENERATING A CATALYTIC PARTICULATE FILTER LOCATED IN THE EXHAUST LINE OF A DIESEL ENGINE Expired - Fee Related FR2897647B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0601418A FR2897647B1 (en) 2006-02-17 2006-02-17 SYSTEM AND METHOD FOR REGENERATING A CATALYTIC PARTICULATE FILTER LOCATED IN THE EXHAUST LINE OF A DIESEL ENGINE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0601418A FR2897647B1 (en) 2006-02-17 2006-02-17 SYSTEM AND METHOD FOR REGENERATING A CATALYTIC PARTICULATE FILTER LOCATED IN THE EXHAUST LINE OF A DIESEL ENGINE

Publications (2)

Publication Number Publication Date
FR2897647A1 true FR2897647A1 (en) 2007-08-24
FR2897647B1 FR2897647B1 (en) 2011-07-22

Family

ID=37492386

Family Applications (1)

Application Number Title Priority Date Filing Date
FR0601418A Expired - Fee Related FR2897647B1 (en) 2006-02-17 2006-02-17 SYSTEM AND METHOD FOR REGENERATING A CATALYTIC PARTICULATE FILTER LOCATED IN THE EXHAUST LINE OF A DIESEL ENGINE

Country Status (1)

Country Link
FR (1) FR2897647B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2943720A1 (en) * 2009-03-24 2010-10-01 Peugeot Citroen Automobiles Sa Particle filter regeneration method for diesel engine of vehicle, involves adjusting hydrocarbon flow according to characteristic parameter of exhaust gas, where parameter is instantaneous oxygen concentration or richness of exhaust gas

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104131872B (en) * 2014-07-16 2016-07-06 潍柴动力股份有限公司 The control method of a kind of SCR temperature of reactor and device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2811370A1 (en) * 2000-07-07 2002-01-11 Daimler Chrysler Ag IC engines esp. for motor vehicles with fuel after-injection for particle filter regeneration regulated dependent upon exhaust temperature in front of filter
WO2002038932A1 (en) * 2000-11-11 2002-05-16 Robert Bosch Gmbh Method and device for controlling an exhaust gas aftertreatment system
EP1387071A1 (en) * 2002-07-31 2004-02-04 Mazda Motor Corporation Engine exhaust gas purification apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2811370A1 (en) * 2000-07-07 2002-01-11 Daimler Chrysler Ag IC engines esp. for motor vehicles with fuel after-injection for particle filter regeneration regulated dependent upon exhaust temperature in front of filter
WO2002038932A1 (en) * 2000-11-11 2002-05-16 Robert Bosch Gmbh Method and device for controlling an exhaust gas aftertreatment system
EP1387071A1 (en) * 2002-07-31 2004-02-04 Mazda Motor Corporation Engine exhaust gas purification apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2943720A1 (en) * 2009-03-24 2010-10-01 Peugeot Citroen Automobiles Sa Particle filter regeneration method for diesel engine of vehicle, involves adjusting hydrocarbon flow according to characteristic parameter of exhaust gas, where parameter is instantaneous oxygen concentration or richness of exhaust gas

Also Published As

Publication number Publication date
FR2897647B1 (en) 2011-07-22

Similar Documents

Publication Publication Date Title
EP1987239B1 (en) Method and device for regenerating the particle filter of an internal combustion engine during the transient operating phases thereof
FR2964697A1 (en) METHOD FOR MONITORING THE CONVERSION SUCCESS OF POLLUTANTS IN AN EXHAUST GAS POST-PROCESSING SYSTEM
FR2897647A1 (en) Catalytic particle filter regeneration system for e.g. diesel engine, has module to control fuel quantity so that catalyzer`s temperature is less than limit temperature, and with calculation module calculating fuel quantity to be injected
WO2007034097A2 (en) System and method for regenerating a catalytic particulate filter located in a diesel engine exhaust line
EP1929136B1 (en) System for regenerating a catalytic particulate filter located in a diesel engine exhaust line
FR2849103A1 (en) Determining mass of soot burned off during exhaust filter regeneration, comprises measuring exhaust gas flowrate and oxygen concentration before and after filter
EP2877720B1 (en) Exhaust gas treatment system comprising a catalytic particulate filter, and corresponding method
EP2137398B1 (en) Exhaust gas recirculation system for a motor vehicle internal combustion engine
FR2829799A1 (en) Pressure signal monitoring method for vehicle Diesel engine exhaust cleaner, has pressure signal verified with respect to set value at certain operating conditions
FR2907162A3 (en) Particle filter regeneration controlling method for motor vehicle, involves regulating temperature of lower wall to recommended set value of evaporation of fuel injected by injector by controlling delayed injection of fuel in chamber
EP1832728B1 (en) Device for pollution control of the exhaust gases from an internal combustion engine
EP2173982B1 (en) System and method for regenerating a catalytic particle filter located in the exhaust line of a diesel engine
FR2950929A1 (en) Water injector controlling system for particulate filter in internal combustion engine of motor vehicle, has unit detecting burst of exothermic reactions in particulate filter, and control unit controlling water injector based on burst
EP2992193B1 (en) Device and method for monitoring a treatment component for gaseous emissions of an exhaust system of an internal combustion engine
FR2931876A1 (en) Fuel quantity regulating device for regenerating particle filter in diesel type motor vehicle, has control unit with flow rate correction module multiplying determined quantity of fuel by function of gas flow rate in inlet of catalyst
EP2016264B1 (en) System and method to monitor the operating status of a catalytic device comprising two catalytic oxidation components arranged in series in the exhaust line of an internal combustion engine
FR2930290A3 (en) Regeneration cycle managing method for diesel engine of motor vehicle, involves comparing estimated and real trapped particle loading levels, and correcting predetermined particle emission model based on comparison result
FR2879244A1 (en) DEVICE FOR CONTROLLING THE REGENERATION OF A PARTICLE FILTER FOR AN INTERNAL COMBUSTION ENGINE AND CORRESPONDING METHOD.
FR2927372A1 (en) Fuel supply controlling method for internal combustion engine e.g. oil engine, of automobile, involves injecting fuel flows after regulating richness during regeneration of sulfur products of nitrogen oxide trap
FR2953559A1 (en) SYSTEM AND METHOD FOR ESTIMATING THE MASS OF PARTICLES STORED IN A PARTICLE FILTER OF A MOTOR VEHICLE
FR2943095A1 (en) Particle filter regeneration process for internal combustion diesel engine of motor vehicle, involves regenerating particle filter by injecting fuel into exhaust line based on defined injection parameter i.e. temperature set point
FR2918113A1 (en) Catalytic converter's operating state diagnosing method for e.g. four-cylinder oil engine of motor vehicle, involves injecting fuel in interval of temperatures comprised between starting temperatures of new and used reference converters
FR2957819A1 (en) Soot quantity determining method for diagnosing malfunction of particle filter in diesel engine of motor vehicle, involves determining difference between quantity of soot present upstream of filter and quantity of soot stored by filter
FR2897640A1 (en) Particle filter regenerating method for e.g. diesel type internal combustion engine, involves adjusting temperature of exhaust gas to value higher than or equal to temperature necessary for regeneration of filter
FR2951501A1 (en) Exhaust gas post-processing device operability verifying method for heat engine of commercial vehicle, involves generating exhaust gas atmosphere by post-injection in combustion chamber of engine

Legal Events

Date Code Title Description
PLFP Fee payment

Year of fee payment: 10

PLFP Fee payment

Year of fee payment: 11

PLFP Fee payment

Year of fee payment: 12

ST Notification of lapse

Effective date: 20181031