EP1165945A1 - Particulate filter regeneration method involving the input of a solution containing hydroxyl compounds - Google Patents

Particulate filter regeneration method involving the input of a solution containing hydroxyl compounds

Info

Publication number
EP1165945A1
EP1165945A1 EP00903773A EP00903773A EP1165945A1 EP 1165945 A1 EP1165945 A1 EP 1165945A1 EP 00903773 A EP00903773 A EP 00903773A EP 00903773 A EP00903773 A EP 00903773A EP 1165945 A1 EP1165945 A1 EP 1165945A1
Authority
EP
European Patent Office
Prior art keywords
combustion
regeneration
particulate filter
solution
supply
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Withdrawn
Application number
EP00903773A
Other languages
German (de)
French (fr)
Inventor
Frédéric DIONNET
Sabine Lunati
Frédéric Novel Cattin
Olivier Trohel
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
Publication of EP1165945A1 publication Critical patent/EP1165945A1/en
Withdrawn legal-status Critical Current

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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
    • F01N3/029—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 by adding non-fuel substances to exhaust
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture

Definitions

  • the present invention relates to the technical field of regeneration of particle filters.
  • the invention relates to a method of regeneration by combustion of a particulate filter placed on the exhaust pipe of an internal combustion engine.
  • Diesel engine exhaust contains solid particles which it is desirable to retain in filters, so as to reduce pollution.
  • filters tend to clog up due to the accumulation of filtered particles.
  • the progressive clogging of the filters causes, in the exhaust ducts, a back pressure of increasing value, which can become damaging. Therefore, a filter must be cleaned periodically before it can be used under acceptable conditions. This step is called regenerating the filter. It is obtained by total in situ oxidation of the particles, essentially consisting of solid, polycondensed and highly dehydrogenated carbon molecules, and absorbed heavy hydrocarbons.
  • the first consists of passive assistance, by adding a catalytic phase to the filter or an organometallic additive in the fuel so as to lower the combustion start temperature.
  • the catalytic phases are generally not stable. Indeed, the combustion of the particles fixed on the filter is an exothermic reaction which causes the aging of the catalyst.
  • the catalytic phase and the additives may not allow the combustion of the particles at temperatures below 400 ° C.
  • certain additives can degrade the ceramic supports of the filters, and in general, the accumulation of these additives leads to clogging of the filters.
  • the second line of action consists of active assistance through the provision of energy by external heating. This can be achieved in particular by means of a burner or an electrical resistance. Such an addition generally takes place only for the start-up phase of the reaction, the latter, once initiated, self-sustaining. However, the electrical power required to heat the exhaust gases or the filter itself, results in additional installation costs and significant overconsumption.
  • the present invention proposes to promote the regeneration of a particulate filter at a lower temperature.
  • the method comprises an additional supply of chemical compounds, such as iron, sodium or cerium, mixed directly with the fuel.
  • the method comprises the presence of a catalytic phase disposed on the particle filter.
  • the method comprises an energy supply at the level of the particle filter.
  • the solution used is an aqueous solution or a solution containing alcohols.
  • Figure 1 shows, schematically, the intake and exhaust system of an internal combustion engine.
  • FIG. 1 an internal combustion engine 1, consisting of a combustion chamber 7, connected to an intake system, which consists of an intake duct 2 and an intake manifold 3 , and to an exhaust system, which consists of an exhaust manifold 4 and an exhaust duct 5.
  • an intake system which consists of an intake duct 2 and an intake manifold 3
  • an exhaust system which consists of an exhaust manifold 4 and an exhaust duct 5.
  • a filter 6 which is crossed by the gases d exhaust from combustion.
  • the supply of solution takes place before the combustion of the fuel mixture has taken place.
  • the supply can be made, for example, by a direct injection into the fuel or by a direct injection into the intake air, into the exhaust gas recirculation duct, or into the cylinder.
  • the addition can also be made by a fuel previously additivated (of the aquazole type, for example) for which different methods of stabilizing the fuel / solution emulsion already exist.
  • Injection systems of aqueous solution upstream of the engine 1 are already used since the presence of water in the fuel, during the combustion, reduces the production of nitrogen oxides and soot. For these systems, water injection takes place during the entire operation of engine 1.
  • a second embodiment consists in injecting the solution, containing compounds having at least one hydroxyl function, downstream of the combustion chamber 7 and upstream of the filter 6.
  • the solution is therefore injected directly into the exhaust gases.
  • a first system for injecting the solution into the fuel, placed upstream of the combustion chamber can participate in the regeneration of the filter, but also reduce, for example if the solution used is water, the production of nitrogen oxides and soot during combustion.
  • a second injection system located downstream of the combustion chamber can be exclusively dedicated to promoting the regeneration of the filter.
  • the filter contains a catalytic phase, or if the fuel includes additives of the Iron, Sodium, Cerium, Copper, Manganese type, the supply of solution in the exhaust gases allows regeneration of the filter in the urban cycle and extra urban, even for relatively low exhaust gas temperatures.
  • an external supply of energy by heating the filter for example of the electric heating, burner or microwave type, is very low, or even useless. It is then possible to use an exhaust gas heating system or filter that consumes little energy, and even to completely eliminate such a system.
  • the solution used can be, for example, simply water, but can also be a solution of alcohols, or else a mixture of these two compounds.
  • An example of an aqueous solution used in the present invention is that of glycol water.
  • the present invention promotes the regeneration of a particulate filter by lowering the temperature of ignition of the particles and of propagation throughout the soot bed, and allows more frequent regenerations of the filter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

A method for regenerating a particulate filter (6) arranged on the exhaust pipe (5) of an internal combustion engine (1). A solution containing compounds having at least one hydroxyl function is inputted upstream from the particulate filter (6) in order to reduce the ignition temperature of the particles that are captured by the particulate filter (6).

Description

Procédé de régénération assistée de filtre à particules par apport de solution contenant des composés hydroxyles. Process of assisted regeneration of particulate filter by addition of solution containing hydroxyl compounds.
La présente invention se rapporte au domaine technique de régénération des filtres à particules.The present invention relates to the technical field of regeneration of particle filters.
Plus particulièrement, l'invention concerne un procédé de régénération par combustion d'un filtre à particules placé sur la conduite d'échappement d'un moteur à combustion interne.More particularly, the invention relates to a method of regeneration by combustion of a particulate filter placed on the exhaust pipe of an internal combustion engine.
Les gaz d'échappement des moteurs Diesel contiennent des particules solides qu'il est souhaitable de retenir dans des filtres, de façon à réduire la pollution.Diesel engine exhaust contains solid particles which it is desirable to retain in filters, so as to reduce pollution.
Ces filtres ont tendance à s'obstruer à cause de l'accumulation des particules filtrées. Le colmatage progressif des filtres, au cours de leur utilisation, provoque, dans les conduits d'échappement, une contre pression de valeur croissante, qui peut devenir dommageable. C'est pourquoi, un filtre doit périodiquement être nettoyé afin de pouvoir être utilisé dans des conditions acceptables. Cette étape s'appelle la régénération du filtre. Elle est obtenue par oxydation totale in situ des particules, constituées essentiellement de molécules carbonées solides, polycondensées et fortement deshydrogénées, et d'hydrocarbures lourds absorbés.These filters tend to clog up due to the accumulation of filtered particles. The progressive clogging of the filters, during their use, causes, in the exhaust ducts, a back pressure of increasing value, which can become damaging. Therefore, a filter must be cleaned periodically before it can be used under acceptable conditions. This step is called regenerating the filter. It is obtained by total in situ oxidation of the particles, essentially consisting of solid, polycondensed and highly dehydrogenated carbon molecules, and absorbed heavy hydrocarbons.
Le démarrage de la combustion nécessite une température de l'ordre de 600° C, température qui est supérieure à la température moyenne des gaz d'échappement des moteurs Diesel. Pour obtenir la régénération totale des filtres, deux axes d'action peuvent être envisagés. Le premier consiste en une assistance passive, par l'ajout d'une phase catalytique sur le filtre ou d'un additif organométallique dans le carburant de façon à abaisser la température de démarrage de la combustion. Cependant, les phases catalytiques ne sont généralement pas stables. En effet, la combustion des particules fixées sur le filtre est une réaction exothermique qui provoque le vieillissement du catalyseur. En outre, la phase catalytique et les additifs peuvent ne pas permettre la combustion des particules à des températures inférieures à 400°C. De plus, certains additifs peuvent dégrader les supports céramiques des filtres, et d'une manière générale, l'accumulation de ces additifs entraîne le bouchage des filtres.Starting combustion requires a temperature of the order of 600 ° C, a temperature which is higher than the average temperature of the exhaust gases from diesel engines. To obtain total regeneration of the filters, two lines of action can be envisaged. The first consists of passive assistance, by adding a catalytic phase to the filter or an organometallic additive in the fuel so as to lower the combustion start temperature. However, the catalytic phases are generally not stable. Indeed, the combustion of the particles fixed on the filter is an exothermic reaction which causes the aging of the catalyst. In addition, the catalytic phase and the additives may not allow the combustion of the particles at temperatures below 400 ° C. In addition, certain additives can degrade the ceramic supports of the filters, and in general, the accumulation of these additives leads to clogging of the filters.
Le deuxième axe d'action consiste en une assistance active par un apport d'énergie par chauffage extérieur. Ceci peut être réalisé notamment au moyen d'un brûleur ou d'une résistance électrique. Un tel apport n'a généralement lieu que pour la phase de démarrage de la réaction, celle-ci, une fois amorcée, s'entretenant d'elle-même. Néanmoins, la puissance électrique nécessaire pour chauffer les gaz d'échappement ou le filtre lui- même, entraîne un surcoût d'installation et une surconsommation importante.The second line of action consists of active assistance through the provision of energy by external heating. This can be achieved in particular by means of a burner or an electrical resistance. Such an addition generally takes place only for the start-up phase of the reaction, the latter, once initiated, self-sustaining. However, the electrical power required to heat the exhaust gases or the filter itself, results in additional installation costs and significant overconsumption.
La présente invention propose de favoriser la régénération d'un filtre à particules à plus basse température.The present invention proposes to promote the regeneration of a particulate filter at a lower temperature.
Dans ce but, elle propose un procédé de régénération par combustion de filtre à particules comportant un apport de solution, contenant des composés possédant au moins une fonction hydroxyle. Cet apport est effectué en amont du filtre à particules.To this end, it proposes a regeneration process by combustion of a particulate filter comprising a supply of solution, containing compounds having at least one hydroxyl function. This contribution is made upstream of the particle filter.
Selon une autre caractéristique de l'invention, un tel apport est réalisé dans les gaz d'admission du moteur à combustion interne ou dans le carburant, ou directement dans les gaz d'échappement. Selon une autre caractéristique de l'invention, un tel apport est réalisé de façon continue ou pendant des durées limitées. Selon une autre caractéristique de l'invention, le procédé comporte un apport additionnel de composés chimiques, tels que le fer, le sodium ou le cérium, mélangés directement au carburant.According to another characteristic of the invention, such a contribution is made in the intake gases of the internal combustion engine or in the fuel, or directly in the exhaust gases. According to another characteristic of the invention, such an addition is carried out continuously or for limited periods. According to another characteristic of the invention, the method comprises an additional supply of chemical compounds, such as iron, sodium or cerium, mixed directly with the fuel.
Selon une autre caractéristique de l'invention, le procédé comporte la présence d'une phase catalytique disposée sur le filtre à particules.According to another characteristic of the invention, the method comprises the presence of a catalytic phase disposed on the particle filter.
Selon une autre caractéristique de l'invention, le procédé comporte un apport d'énergie au niveau du filtre à particules.According to another characteristic of the invention, the method comprises an energy supply at the level of the particle filter.
Selon une autre caractéristique de l'invention, la solution utilisée est une solution aqueuse ou une solution contenant des alcools. La figure 1 représente, de façon schématique, le système d'admission et d'échappement d'un moteur à combustion interne.According to another characteristic of the invention, the solution used is an aqueous solution or a solution containing alcohols. Figure 1 shows, schematically, the intake and exhaust system of an internal combustion engine.
Sur la figure 1 est représenté un moteur à combustion interne 1, constitué d'une chambre de combustion 7, liée à un système d'admission, qui se compose d'un conduit d'admission 2 et d'un collecteur d'admission 3, et à un système d'échappement, qui se compose d'un collecteur d'échappement 4 et d'un conduit d'échappement 5. Sur le conduit d'échappement 5 est placé un filtre 6, qui est traversé par les gaz d'échappement issus de la combustion.In Figure 1 is shown an internal combustion engine 1, consisting of a combustion chamber 7, connected to an intake system, which consists of an intake duct 2 and an intake manifold 3 , and to an exhaust system, which consists of an exhaust manifold 4 and an exhaust duct 5. On the exhaust duct 5 is placed a filter 6, which is crossed by the gases d exhaust from combustion.
Selon un premier mode de réalisation de l'invention, l'apport de solution a lieu avant que la combustion du mélangé carburé n'ait eu lieu. L'apport peut se faire, par exemple, par une injection directe dans le carburant ou par une injection directe dans l'air d'admission, dans le conduit de recirculation des gaz d'échappement, ou dans le cylindre. L'apport peut également se faire par un carburant préalablement additivé (du type aquazole, par exemple) pour lequel différents procédés de stabilisation de l'émulsion carburant/solution existent déjà.According to a first embodiment of the invention, the supply of solution takes place before the combustion of the fuel mixture has taken place. The supply can be made, for example, by a direct injection into the fuel or by a direct injection into the intake air, into the exhaust gas recirculation duct, or into the cylinder. The addition can also be made by a fuel previously additivated (of the aquazole type, for example) for which different methods of stabilizing the fuel / solution emulsion already exist.
Des systèmes d'injection de solution aqueuse en amont du moteur 1 sont déjà utilisés puisque la présence d'eau dans le carburant, lors de la combustion, permet de diminuer la production d'oxydes d'azote et de suies. Pour ces systèmes, l'injection d'eau a lieu durant tout le fonctionnement du moteur 1.Injection systems of aqueous solution upstream of the engine 1 are already used since the presence of water in the fuel, during the combustion, reduces the production of nitrogen oxides and soot. For these systems, water injection takes place during the entire operation of engine 1.
. Un second mode de réalisation consiste à effectuer l'injection de la solution, contenant des composés possédant au moins une fonction hydroxyle, en aval de la chambre de combustion 7 et en amont du filtre 6.. A second embodiment consists in injecting the solution, containing compounds having at least one hydroxyl function, downstream of the combustion chamber 7 and upstream of the filter 6.
L'injection de la solution se fait donc directement dans les gaz d'échappement.The solution is therefore injected directly into the exhaust gases.
L'injection de la solution, selon les modes de réalisation décrits précédemment, permet de provoquer des régénérations du filtre plus fréquentes, ce qui présente l'avantage, d'une part, de limiter l'exothermicité de la combustion due à la régénération du filtre pour des masses de suies relativement faibles, permettant la préservation de l'intégrité du matériau constituant le filtre, en évitant son vieillissement prématuré dû aux chocs thermiques.The injection of the solution, according to the embodiments described above, makes it possible to cause more frequent regenerations of the filter, which has the advantage, on the one hand, of limiting the exothermicity of the combustion due to the regeneration of the filter for relatively small soot masses, allowing the integrity of the material constituting the filter to be preserved, avoiding its premature aging due to thermal shocks.
Il est possible d'envisager l'ajout d'une phase catalytique sur le filtre pour faire diminuer encore davantage la température de démarrage de la combustion des particules. L'ajout de la solution dans les gaz d'échappement permet dans un tel cas, comme pour le filtre, de préserver la phase catalytique contre un vieillissement du catalyseur dû à la quantité de chaleur dégagée pendant la combustion.It is possible to envisage adding a catalytic phase to the filter in order to further decrease the temperature at which the combustion of particles starts. The addition of the solution in the exhaust gases makes it possible, in such a case, as for the filter, to preserve the catalytic phase against aging of the catalyst due to the amount of heat released during combustion.
Selon la présente invention, il n'est pas nécessaire d'injecter la solution en permanence. En effet, dans les deux modes de réalisation ci- dessus décrits, il est possible d'injecter la solution dans le carburant, seulement en transitoire, pendant des phases de durées déterminées, par exemple juste pendant la phase de régénération du filtre.According to the present invention, it is not necessary to inject the solution continuously. In fact, in the two embodiments described above, it is possible to inject the solution into the fuel, only in transient state, during phases of determined durations, for example just during the regeneration phase of the filter.
Les deux modes de réalisation décrits peuvent être combinés. En effet, un premier système d'injection de la solution dans le carburant, placé en amont de la chambre de combustion, peut participer à la régénération du filtre, mais aussi faire diminuer, par exemple si la solution utilisée est de l'eau, la production d'oxydes d'azote et de suies lors de la combustion. Un second système d'injection situé en aval de la chambre de combustion peut être exclusivement dédié à favoriser la régénération du filtre.The two embodiments described can be combined. Indeed, a first system for injecting the solution into the fuel, placed upstream of the combustion chamber, can participate in the regeneration of the filter, but also reduce, for example if the solution used is water, the production of nitrogen oxides and soot during combustion. A second injection system located downstream of the combustion chamber can be exclusively dedicated to promoting the regeneration of the filter.
Si le filtre contient une phase catalytique, ou si le carburant comprend des additifs du type Fer, Sodium, Cérium, Cuivre, Manganèse, l'apport de solution dans les gaz d'échappement permet d'obtenir une régénération du filtre en cycle urbain et extra urbain, c'est à dire même pour des températures de gaz d'échappement relativement basses. Dans ce cas, un apport extérieur d'énergie par chauffage du filtre, par exemple du type chauffage électrique, brûleur ou micro-onde, est très faible, voire inutile. Il est alors possible d'utiliser un système de chauffage des gaz d'échappement ou du filtre peu consommateur d'énergie, et, voire même, de supprimer complètement un tel système.If the filter contains a catalytic phase, or if the fuel includes additives of the Iron, Sodium, Cerium, Copper, Manganese type, the supply of solution in the exhaust gases allows regeneration of the filter in the urban cycle and extra urban, even for relatively low exhaust gas temperatures. In this case, an external supply of energy by heating the filter, for example of the electric heating, burner or microwave type, is very low, or even useless. It is then possible to use an exhaust gas heating system or filter that consumes little energy, and even to completely eliminate such a system.
Le fait de diminuer la température d'inflammation des particules, impose des contraintes thermiques moins importantes pour les matériaux constituant le filtre. Il est alors envisageable d'utiliser d'autres matériaux ayant une tenue thermique moins élevée. Par exemple, il est possible de réaliser des filtres en cordiérite, moins coûteux que ceux réalisés en carbure de silicium.The fact of reducing the ignition temperature of the particles imposes less significant thermal stresses on the materials constituting the filter. It is therefore possible to use other materials having a lower thermal resistance. For example, it is possible to produce cordierite filters, which are less costly than those made of silicon carbide.
L'apport de solution, contenant des composés possédant au moins une fonction hydroxyle, donne la possibilité d'utiliser des additifs en plus faible concentration dans le carburant. Il y a alors une accumulation moins importante de ces additifs sur le filtre, et donc un colmatage de ce dernier moins rapide.Providing a solution, containing compounds having at least one hydroxyl function, gives the possibility of using additives in lower concentration in the fuel. There is then a less significant accumulation of these additives on the filter, and therefore a clogging of the latter slower.
La solution utilisée peut être, par exemple, tout simplement de l'eau, mais peut aussi être une solution d'alcools, ou bien d'un mélange de ces deux composés. Un exemple de solution aqueuse utilisée dans la présente invention est celle d'eau glycolée.The solution used can be, for example, simply water, but can also be a solution of alcohols, or else a mixture of these two compounds. An example of an aqueous solution used in the present invention is that of glycol water.
En conclusion, la présente invention favorise la régénération d'un filtre à particules en faisant baisser la température d'inflammation des particules et de propagation à tout le lit de suies, et permet des régénérations plus fréquentes du filtre. In conclusion, the present invention promotes the regeneration of a particulate filter by lowering the temperature of ignition of the particles and of propagation throughout the soot bed, and allows more frequent regenerations of the filter.

Claims

REVENDICATIONS
1. Procédé de régénération par combustion d'un filtre à particules (6) placé sur la conduite d'échappement (5) d'un moteur à combustion interne (1), caractérisé en ce qu'il comporte un apport de solution, contenant des composés possédant au moins une fonction hydroxyle, cet apport étant effectué en amont du filtre à particules (6), de façon à faciliter l'inflammation des particules.1. Method of regeneration by combustion of a particulate filter (6) placed on the exhaust pipe (5) of an internal combustion engine (1), characterized in that it comprises a supply of solution, containing compounds having at least one hydroxyl function, this contribution being made upstream of the particle filter (6), so as to facilitate the ignition of the particles.
2.Procédé de régénération par combustion d'un filtre à particules (6) selon la revendication 1, caractérisé en ce que l'apport de solution est réalisé dans les gaz d'admission du moteur à combustion interne (1) ou dans le carburant.2. regeneration process by combustion of a particulate filter (6) according to claim 1, characterized in that the supply of solution is carried out in the intake gases of the internal combustion engine (1) or in the fuel .
3. Procédé de régénération par combustion d'un filtre à particules (6) selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que l'apport de solution est réalisé directement dans les gaz d'échappement. 3. A method of regeneration by combustion of a particle filter (6) according to any one of claims 1 or 2, characterized in that the supply of solution is carried out directly in the exhaust gases.
4.Procédé de régénération par combustion d'un filtre à particules selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'apport de solution est réalisé de façon continue.4. Method of regeneration by combustion of a particle filter according to any one of claims 1 to 3, characterized in that the supply of solution is carried out continuously.
5. Procédé de régénération par combustion d'un filtre à particules selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'apport de solution est réalisé pendant des durées limitées. β.Procédé de régénération par combustion d'un filtre à particules selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il comporte un apport additionnel de composés chimiques, tels que le fer, le sodium ou le cérium, mélangés directement au carburant. 7.Procédé de régénération par combustion d'un filtre à particules selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comporte la présence d'une phase catalytique disposée sur le filtre à particules (6). δ.Procédé de régénération par combustion d'un filtre à particules selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il comporte un apport d'énergie au niveau du filtre à particules (6).5. A method of regeneration by combustion of a particulate filter according to any one of claims 1 to 4, characterized in that the supply of solution is carried out for limited periods. β.Regeneration process by combustion of a particulate filter according to any one of claims 1 to 5, characterized in that it comprises an additional supply of chemical compounds, such as iron, sodium or cerium, mixed directly to the fuel. 7. Method of regeneration by combustion of a particulate filter according to any one of claims 1 to 6, characterized in that it comprises the presence of a catalytic phase disposed on the particulate filter (6). δ.Process of regeneration by combustion of a particle filter according to any one of claims 1 to 7, characterized in that it comprises an energy supply at the level of the particle filter (6).
, 9.Procédé de régénération par combustion d'un filtre à particules selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la solution est une solution aqueuse. lO.Procédé de régénération par combustion d'un filtre à particules selon l'une quelconque des revendications 1 à 9, caractérisé en ce que la solution contient des alcools. 9. A method of regeneration by combustion of a particulate filter according to any one of claims 1 to 8, characterized in that the solution is an aqueous solution. 10. A method of regeneration by combustion of a particulate filter according to any one of claims 1 to 9, characterized in that the solution contains alcohols.
EP00903773A 1999-02-24 2000-02-10 Particulate filter regeneration method involving the input of a solution containing hydroxyl compounds Withdrawn EP1165945A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9902286A FR2789910B1 (en) 1999-02-24 1999-02-24 ASSISTED REGENERATION PROCESS OF PARTICLE FILTER BY PROVIDING SOLUTION CONTAINING HYDROXYLATED COMPOUNDS
FR9902286 1999-02-24
PCT/FR2000/000319 WO2000050744A1 (en) 1999-02-24 2000-02-10 Particulate filter regeneration method involving the input of a solution containing hydroxyl compounds

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JPS57162629A (en) * 1981-03-30 1982-10-06 Tsuchiya Mfg Co Ltd Treatment of fine particle in waste gas
JPS60153413A (en) * 1984-01-20 1985-08-12 Toyota Motor Corp Diesel exhaust purification device
DE3436351A1 (en) * 1984-10-04 1986-04-10 Filterwerk Mann & Hummel Gmbh, 7140 Ludwigsburg METHOD FOR REMOVING SUSPENSED IN AN EXHAUST FILTER OF AN INTERNAL COMBUSTION ENGINE
JPS6293420A (en) * 1985-10-18 1987-04-28 Mazda Motor Corp Solution of catalyst
DE4041127A1 (en) * 1990-12-21 1992-02-20 Daimler Benz Ag METHOD FOR REDUCING POLLUTANT EMISSIONS FROM COMBUSTION EXHAUST GASES FROM DIESEL ENGINES
DE69306715T2 (en) * 1992-09-28 1997-04-30 Ford Werke Ag Device for controlling particle and exhaust gas emissions

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FR2789910A1 (en) 2000-08-25
FR2789910B1 (en) 2004-07-09
WO2000050744A1 (en) 2000-08-31

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