FR2880065A1 - Internal combustion engine exhaust gas depollution device, has oxidation catalyst placed upstream of soot particle filter to reheat gas, and another oxidation catalyst placed upstream of fuel injector to treat HC and carbon-monoxide of gas - Google Patents

Internal combustion engine exhaust gas depollution device, has oxidation catalyst placed upstream of soot particle filter to reheat gas, and another oxidation catalyst placed upstream of fuel injector to treat HC and carbon-monoxide of gas Download PDF

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Publication number
FR2880065A1
FR2880065A1 FR0453187A FR0453187A FR2880065A1 FR 2880065 A1 FR2880065 A1 FR 2880065A1 FR 0453187 A FR0453187 A FR 0453187A FR 0453187 A FR0453187 A FR 0453187A FR 2880065 A1 FR2880065 A1 FR 2880065A1
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Prior art keywords
oxidation catalyst
gas
exhaust gas
placed upstream
catalyst
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FR0453187A
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French (fr)
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FR2880065B1 (en
Inventor
Marc Daneau
Eric Dufay
Arnaud Julliard
Catherine Goubault
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Renault SAS
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Renault SAS
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust 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
    • F01N3/023Exhaust 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
    • F01N3/025Exhaust 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
    • F01N3/0253Exhaust 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust 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
    • F01N13/009Exhaust 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust 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
    • F01N13/009Exhaust 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
    • F01N13/0093Exhaust 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 of the same type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust 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
    • F01N13/009Exhaust 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
    • F01N13/0097Exhaust 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust 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
    • F01N3/033Exhaust 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
    • F01N3/035Exhaust 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002Monitoring 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

Abstract

The device has an oxidation catalyst (4) placed upstream of a soot particle filter (5), and a fuel injector (6) placed upstream of the catalyst. An oxidation catalyst (3) is placed upstream of the injector. The catalyst (3) treats HC and carbon-monoxide (CO) coming from an exhaust gas of an internal combustion engine. The catalyst (4) reheats periodically the gas in the upstream of the filter using the fuel.

Description

La présente invention concerne les dispositifs de dépollution des gazThe present invention relates to gas depollution devices

d'échappement de moteurs à combustion interne, et plus particulièrement les dispositifs de dépollution des gaz d'échappement comportant un filtre à particules.  exhaust system of internal combustion engines, and more particularly the exhaust gas pollution control devices comprising a particulate filter.

Le filtre à particules capture des particules de suies émises par le moteur. Pour éviter le colmatage du filtre, on réalise des phases périodiques de régénération qui permettent de brûler les particules piégées, en élevant la température des gaz d'échappement de sorte que l'on obtienne une température au niveau du filtre à particules comprise entre 570 C et 650 C.  The particulate filter captures soot particles emitted by the engine. To prevent clogging of the filter, periodic regeneration phases are carried out which make it possible to burn off the trapped particles, by raising the temperature of the exhaust gases so that a temperature at the level of the particulate filter of between 570.degree. C. is obtained. and 650 C.

Pour amorcer une phase de régénération, on peut utiliser des postinjections de carburants dans les cylindres du moteur, par commande des injecteurs du moteur, décrites par exemple dans le document FR 2774427. Ce type de régénération présente l'inconvénient d'élever la température des gaz d'échappement très en amont du filtre à particule, ce qui pose notamment des problèmes de tenue thermomécanique. De plus, la postinjection de carburant dans les cylindres du moteur provoque un phénomène de dilution de l'huile de lubrification du moteur qui est beaucoup plus important que dans le cadre d'une injection classique de carburant pour faire fonctionner le moteur.  To initiate a regeneration phase, it is possible to use post-injections of fuels in the cylinders of the engine, by control of the engine injectors, described for example in the document FR 2774427. This type of regeneration has the drawback of raising the temperature of the engines. exhaust gas very upstream of the particulate filter, which poses particular thermomechanical behavior problems. In addition, the postinjection of fuel into the engine cylinders causes a phenomenon of dilution of the engine lubricating oil which is much greater than in the context of a conventional injection of fuel to operate the engine.

On peut aussi placer un injecteur supplémentaire dans la ligne d'échappement, en amont d'un catalyseur d'oxydation. Le catalyseur d'oxydation réduit les hydrocarbures, appelés HC et le monoxyde de carbone, appelé CO. Cette phase de réduction est exothermique, elle augmente la température des gaz d'échappement pour brûler les particules. Le document US 2004/0226288 décrit ce type de dispositif. Un inconvénient est que le catalyseur d'oxydation est fortement sollicité, car d'une part il doit jouer son rôle d'élément de dépollution en réduisant de façon continue les HC et CO provenant des gaz d'échappement, et car d'autre part il doit en plus jouer son rôle de réchauffeur des gaz d'échappement dans le but de déclencher une phase de régénération. Cette forte sollicitation thermique peut être à l'origine d'un vieillissement anticipé, voire de casse du catalyseur peut avoir des émissions de HC et de CO en entrée du filtre à particules si on ne peut déterminer très exactement leurs proportions dans les gaz d'échappement et l'oxygène disponible pour les faire réagir.  An additional injector may also be placed in the exhaust line upstream of an oxidation catalyst. The oxidation catalyst reduces the hydrocarbons, called HC and carbon monoxide, called CO. This reduction phase is exothermic, it increases the temperature of the exhaust gas to burn the particles. Document US 2004/0226288 describes this type of device. A disadvantage is that the oxidation catalyst is highly stressed, because on the one hand it must play its role as a pollution control element by continuously reducing the HC and CO from the exhaust gases, and because on the other hand it must also play its role of exhaust gas heater in order to trigger a regeneration phase. This strong thermal stress can be at the origin of anticipated aging, or even of catalyst failure, can have emissions of HC and CO at the input of the particulate filter if we can not determine exactly their proportions in the gases of exhaust and oxygen available to react.

Un des objets de l'invention est de pallier aux problèmes décrits ci-dessus.  One of the objects of the invention is to overcome the problems described above.

L'invention fournit dans ce but un dispositif de dépollution des gaz d'échappement d'un moteur à combustion interne comportant un ensemble formé d'un filtre à particules, d'un premier catalyseur d'oxydation placé en amont du filtre à particules et d'un injecteur de carburant placé en amont du catalyseur, caractérisé en ce que le dispositif comporte un deuxième catalyseur d'oxydation placé en amont de l'injecteur.  To this end, the invention provides a device for the pollution control of the exhaust gases of an internal combustion engine comprising an assembly formed of a particulate filter, a first oxidation catalyst placed upstream of the particulate filter, and a fuel injector placed upstream of the catalyst, characterized in that the device comprises a second oxidation catalyst placed upstream of the injector.

Le premier catalyseur peut réchauffer périodiquement les gaz d'échappement en amont du filtre à particules à l'aide de carburant, et le deuxième catalyseur d'oxydation peut traiter les HC et CO des gaz d'échappement qui proviennent du moteur.  The first catalyst can periodically heat the exhaust gas upstream of the particulate filter with fuel, and the second oxidation catalyst can process HC and CO from the engine exhaust.

Selon d'autres caractéristiques de l'invention, le dispositif peut comporter un capteur de température placé en entrée du premier catalyseur, de sorte à connaître la température des gaz d'échappement avant chauffage. Le dispositif peut également comporter un capteur de température placé en entrée du filtre à particules, de sorte à connaître la température des gaz d'échappement chauffés. Le dispositif peut également comporter un capteur de pression différentielle mesurant la différence de pression entre l'entrée du premier catalyseur et la sortie du filtre à particules, de sorte à déterminer l'état de colmatage du filtre à particules.  According to other features of the invention, the device may comprise a temperature sensor placed at the inlet of the first catalyst, so as to know the temperature of the exhaust gas before heating. The device may also include a temperature sensor placed at the inlet of the particulate filter, so as to know the temperature of the heated exhaust gas. The device may also include a differential pressure sensor measuring the pressure difference between the inlet of the first catalyst and the outlet of the particulate filter, so as to determine the clogging state of the particulate filter.

La présente invention et ses avantages seront mieux compris à la lecture de la description détaillée d'un mode de réalisation pris à titre d'exemple et nullement limitatif, et illustré par le schéma de la figure 1.  The present invention and its advantages will be better understood on reading the detailed description of an embodiment taken by way of example and in no way limiting, and illustrated by the diagram of FIG. 1.

Le moteur à combustion interne 1 génère des gaz d'échappement qui circulent dans une ligne d'échappement. Le dispositif de dépollution 2 agit au niveau de la ligne d'échappement.  The internal combustion engine 1 generates exhaust gases that circulate in an exhaust line. The depollution device 2 acts at the level of the exhaust line.

Le dispositif de dépollution 2 comporte un filtre à particules 5 qui capture les particules de suies émises par le moteur.  The depollution device 2 comprises a particle filter 5 which captures the soot particles emitted by the engine.

Le dispositif comporte un premier catalyseur d'oxydation 4 placé en amont du filtre à particules 5. II réchauffe les gaz d'échappement à l'aide de carburant. Pour cela, un injecteur 6 pulvérise du carburant en amont du premier catalyseur d'oxydation 4. Ce premier catalyseur d'oxydation 4 est présent uniquement pour la création de chaleur. Il est sollicité périodiquement pendant les phases de régénération du filtre à particules 5.  The device comprises a first oxidation catalyst 4 placed upstream of the particulate filter 5. It heats the exhaust gas with fuel. For this, an injector 6 sprays fuel upstream of the first oxidation catalyst 4. This first oxidation catalyst 4 is present only for the creation of heat. It is periodically solicited during the regeneration phases of the particulate filter 5.

Selon l'invention, le dispositif de dépollution 2 comporte un deuxième catalyseur d'oxydation 3. Le dispositif de dépollution 2 comporte ainsi deux catalyseurs d'oxydation, le deuxième catalyseur 3 traitant les HC et CO qui proviennent des gaz d'échappement, et le premier catalyseur 4 ayant pour rôle de réchauffer les gaz d'échappement. Cette configuration permet de dissocier les deux fonctions que l'on peut obtenir d'un catalyseur d'oxydation, ce qui diminue la sollicitation de chacun d'entre eux. En effet, le deuxième catalyseur d'oxydation 3 joue le rôle d'un catalyseur classique dont la sollicitation thermique est continue, alors que le premier catalyseur d'oxydation 4 est sollicité uniquement pendant une phase de régénération. En dehors de la phase de régénération, le premier catalyseur d'oxydation 4 n'est pas sollicité, les HC et les CO ayant été traités lors du passage des gaz d'échappement dans le deuxième catalyseur 3.  According to the invention, the depollution device 2 comprises a second oxidation catalyst 3. The depollution device 2 thus comprises two oxidation catalysts, the second catalyst 3 treating the HC and CO that come from the exhaust gas, and the first catalyst 4 having the role of heating the exhaust gas. This configuration makes it possible to dissociate the two functions that can be obtained from an oxidation catalyst, which reduces the solicitation of each of them. Indeed, the second oxidation catalyst 3 plays the role of a conventional catalyst whose thermal stress is continuous, while the first oxidation catalyst 4 is solicited only during a regeneration phase. Outside the regeneration phase, the first oxidation catalyst 4 is not stressed, the HC and the CO having been treated during the passage of the exhaust gas in the second catalyst 3.

Le dispositif de dépollution selon l'invention présente aussi des avantages lors de la phase de régénération. Les gaz d'échappement qui sortent du deuxième catalyseur 3 ne contiennent plus de HC ni de CO. Par conséquent, les réducteurs qui réagissent dans le premier catalyseur 4 proviennent uniquement de l'injecteur 6.  The depollution device according to the invention also has advantages during the regeneration phase. The exhaust gases leaving the second catalyst 3 no longer contain HC or CO. Consequently, the reducing agents which react in the first catalyst 4 come solely from the injector 6.

En plaçant un capteur de température 8 en amont du premier catalyseur d'oxydation 4, on peut déterminer la température des gaz d'échappement qui ne contiennent plus de HC et de CO. Un deuxième capteur de température 9 placé en amont du filtre à particules 5, et plus précisément entre la sortie du premier catalyseur d'oxydation 4 et l'entrée du filtre à particule 5, permet de connaître la température des gaz d'échappement une fois réchauffés (lors d'une phase de régénération), qui enclencherons et maintiendrons la combustion des particules de suies.  By placing a temperature sensor 8 upstream of the first oxidation catalyst 4, it is possible to determine the temperature of the exhaust gases that no longer contain HC and CO. A second temperature sensor 9 placed upstream of the particulate filter 5, and more precisely between the outlet of the first oxidation catalyst 4 and the inlet of the particle filter 5, makes it possible to determine the temperature of the exhaust gas once. heated (during a regeneration phase), which will start and maintain the combustion of soot particles.

Le dispositif de dépollution comporte également un capteur 7 de pression différentielle. Le capteur 7 mesure une différence de pression entre l'entrée du premier catalyseur d'oxydation 4 et la sortie du filtre à particules 5, à l'aide de capteur de pression 7a et 7b. Le capteur 7 permet de déterminer l'état de colmatage du filtre à particules 5.  The depollution device also comprises a differential pressure sensor 7. The sensor 7 measures a pressure difference between the inlet of the first oxidation catalyst 4 and the outlet of the particulate filter 5, using a pressure sensor 7a and 7b. The sensor 7 makes it possible to determine the clogging state of the particle filter 5.

Le capteur de pression 7 et les capteurs de température 8 et 9 transmettent des informations à un calculateur 10. Le calculateur 10 traite ces informations et peut ainsi commander l'injecteur 6 pour lancer une phase de régénération du filtre à particules 5. Le calculateur peut également utiliser d'autres informations pour lancer la phase de régénération, par exemple le taux d'oxygène présent en amont du premier catalyseur d'oxydation 4 ou la charge moteur.  The pressure sensor 7 and the temperature sensors 8 and 9 transmit information to a computer 10. The computer 10 processes this information and can thus control the injector 6 to start a regeneration phase of the particle filter 5. The computer can also use other information to initiate the regeneration phase, for example the oxygen level present upstream of the first oxidation catalyst 4 or the engine load.

Claims (6)

Revendicationsclaims 1) Dispositif de dépollution (2) des gaz d'échappement d'un moteur à combustion interne (1) comportant un ensemble formé d'un filtre à particules (5), d'un premier catalyseur d'oxydation (4) placé en amont du filtre à particules (5) et d'un injecteur (6) de carburant placé en amont du premier catalyseur (4), caractérisé en ce que le dispositif (2) comporte un deuxième catalyseur d'oxydation (3) placé en amont de l'injecteur (6).  1) Device for the depollution (2) of the exhaust gases of an internal combustion engine (1) comprising an assembly formed of a particulate filter (5), a first oxidation catalyst (4) placed in upstream of the particle filter (5) and a fuel injector (6) placed upstream of the first catalyst (4), characterized in that the device (2) comprises a second oxidation catalyst (3) placed upstream of the injector (6). 2) Dispositif de dépollution des gaz d'échappement selon la revendication 1, caractérisé en ce que le premier catalyseur (4) réchauffe périodiquement les gaz d'échappement en amont du filtre à particules (5) à l'aide de carburant.  2) Exhaust gas depollution device according to claim 1, characterized in that the first catalyst (4) periodically heats the exhaust gas upstream of the particulate filter (5) with fuel. 3) Dispositif de dépollution des gaz d'échappement selon la revendication 1 ou 2, caractérisé en ce que le deuxième catalyseur d'oxydation (3) traite les HC et CO des gaz d'échappement qui proviennent du moteur.  3) Exhaust gas depollution device according to claim 1 or 2, characterized in that the second oxidation catalyst (3) treats the HC and CO exhaust gas from the engine. 4) Dispositif de dépollution des gaz d'échappement selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il comporte un capteur (8) de température placé en entrée du premier catalyseur (4).  4) Exhaust gas depollution device according to any one of claims 1 to 3, characterized in that it comprises a temperature sensor (8) placed at the inlet of the first catalyst (4). 5) Dispositif de dépollution des gaz d'échappement selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il comporte un capteur de température (9) placé en entrée du filtre à particules (5).  5) Exhaust gas depollution device according to any one of claims 1 to 4, characterized in that it comprises a temperature sensor (9) placed at the inlet of the particle filter (5). 6) Dispositif de dépollution des gaz d'échappement selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il comporte un capteur (7) de pression différentielle mesurant la différence de pression entre l'entrée du premier catalyseur (4) et la sortie du filtre à particules (5).  6) Exhaust gas depollution device according to any one of claims 1 to 5, characterized in that it comprises a sensor (7) differential pressure measuring the pressure difference between the inlet of the first catalyst (4). ) and the output of the particulate filter (5).
FR0453187A 2004-12-23 2004-12-23 DEVICE FOR DEPOLLUTING EXHAUST GASES Expired - Fee Related FR2880065B1 (en)

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WO2007048971A3 (en) * 2005-10-27 2007-06-21 Peugeot Citroen Automobiles Sa Exhaust gas line, in particular for a motor vehicle diesel engine
WO2008062119A1 (en) * 2006-11-23 2008-05-29 Renault S.A.S Method for determining the amount of fuel to be injected in an exhaust line for regenerating a particle filter
FR2909123A1 (en) * 2006-11-27 2008-05-30 Peugeot Citroen Automobiles Sa GAS EXHAUST LINE FOR INTERNAL COMBUSTION ENGINE EQUIPPED WITH DETERMINATION SYSTEMS.
FR2919894A1 (en) * 2007-08-10 2009-02-13 Renault Sas SYSTEM AND METHOD FOR REGENERATING A CATALYTIC PARTICULATE FILTER LOCATED IN THE EXHAUST LINE OF A DIESEL ENGINE
FR2920471A1 (en) * 2007-08-28 2009-03-06 Renault Sas EXHAUST GAS POST-TREATMENT DEVICE
US20110138794A1 (en) * 2008-08-08 2011-06-16 Komatsu Ltd. Exhaust Gas Purifying Device

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EP1321643A1 (en) * 2001-12-19 2003-06-25 Robert Bosch Gmbh Device and method for after-treatment of exhaust gases
US20040204818A1 (en) * 2003-04-11 2004-10-14 Dominic Trudell Computer algorithm to estimate particulate filter regeneration rates
US20040200271A1 (en) * 2003-04-11 2004-10-14 Van Nieuwstadt Michiel J. Pressure sensor diagnosis via a computer

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Publication number Priority date Publication date Assignee Title
EP1321643A1 (en) * 2001-12-19 2003-06-25 Robert Bosch Gmbh Device and method for after-treatment of exhaust gases
US20040204818A1 (en) * 2003-04-11 2004-10-14 Dominic Trudell Computer algorithm to estimate particulate filter regeneration rates
US20040200271A1 (en) * 2003-04-11 2004-10-14 Van Nieuwstadt Michiel J. Pressure sensor diagnosis via a computer

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007048971A3 (en) * 2005-10-27 2007-06-21 Peugeot Citroen Automobiles Sa Exhaust gas line, in particular for a motor vehicle diesel engine
WO2008062119A1 (en) * 2006-11-23 2008-05-29 Renault S.A.S Method for determining the amount of fuel to be injected in an exhaust line for regenerating a particle filter
FR2909126A1 (en) * 2006-11-23 2008-05-30 Renault Sas METHOD FOR DETERMINING THE QUANTITY OF FUEL TO BE INJECTED IN AN EXHAUST LINE TO REGENERATE A PARTICLE FILTER
FR2909123A1 (en) * 2006-11-27 2008-05-30 Peugeot Citroen Automobiles Sa GAS EXHAUST LINE FOR INTERNAL COMBUSTION ENGINE EQUIPPED WITH DETERMINATION SYSTEMS.
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FR2920471A1 (en) * 2007-08-28 2009-03-06 Renault Sas EXHAUST GAS POST-TREATMENT DEVICE
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