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WO2007004791A1 - Systeme de traitement de gaz d'echappement pour un vehicule a basse temperature d'echappement - Google Patents

Systeme de traitement de gaz d'echappement pour un vehicule a basse temperature d'echappement Download PDF

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Publication number
WO2007004791A1
WO2007004791A1 PCT/KR2006/002312 KR2006002312W WO2007004791A1 WO 2007004791 A1 WO2007004791 A1 WO 2007004791A1 KR 2006002312 W KR2006002312 W KR 2006002312W WO 2007004791 A1 WO2007004791 A1 WO 2007004791A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
temperature
diesel fuel
filter
catalyst
Prior art date
Application number
PCT/KR2006/002312
Other languages
English (en)
Inventor
Sang-Hoon Park
Hong-Seok Jung
Yong-Woo Kim
Yun-Guen Cho
Seong-Ho Lee
Woo-Jin Lee
Hyo-Jun Jeon
Original Assignee
Sk Energy Co., Ltd.
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 Sk Energy Co., Ltd. filed Critical Sk Energy Co., Ltd.
Publication of WO2007004791A1 publication Critical patent/WO2007004791A1/fr

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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0821—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/14—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel burner
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor

Definitions

  • the present invention relates to a method and a device for recycling a filter at a low temperature in a vehicle from which low-temperature exhaust gas is discharged, and more particularly, provides a method for inducing a recycling of filter comprising the steps of injecting a small amount of diesel fuel to front ends of a catalyst filter coated with a catalyst and an oxidation catalyst, burning diesel fuel by means of the oxidation catalyst and increasing a temperature of exhaust gas and the filter by using heat generated at the time of burning diesel fuel to burn exhaust gas particles.
  • a forced recycling method is used.
  • a temperature of exhaust gas and the catalyst filter is increased up to a point at which captured particles can be directly oxidized.
  • a heating method using an electric heater and a direct heating method using a means such as a combustion burner.
  • the method for increasing compulsorily a temperature of exhaust gas using an electrical heater provided at an end of the filter is disclosed in Korean patent laid publication No. 2004-0068792.
  • a battery should be used for obtaining an electrical energy to increase a temperature of exhaust gas.
  • a burner is provided inside or outside of the device and high pressure external air is separately supplied to the device, and so the above method is disadvantageous in that the device becomes bigger and becomes complicated in construction so that an economical efficiency becomes lower.
  • an apparatus comprising an injector for injecting fuel at a certain location of an exhaust gas flow passage on which the device for exhaust gas particle is installed and an ignition means for igniting fuel at a location adjacent to the injector is disclosed in Korean Patent Laid Publication No. 2003-0003599.
  • fuel is ignited by the ignition device to increase compulsorily a temperature of exhaust gas.
  • the ignition device is frequently clogged with carbon element.
  • the above apparatus since flame is directly used to burn fuel, although a temperature of exhaust gas can be increased, the above apparatus is disadvantageous in that it is difficult burn completely fuel and amount of unburned exhaust gas particles, hydrocarbon and carbon monoxide are increased so that a load applied to the filter is increased.
  • an additional complicated device is still required for installing the ignition device, and holes of the ignition device is clogged according to the use so that the apparatus can not be used.
  • the above apparatus has a drawback that an economical efficiency becomes lower due to the complicated apparatus and it is difficult to employ realistically the apparatus for long time period so that it is extremely unlikely that the above apparatus will be used.
  • the method comprising the steps of mixing substance containing metal and metal oxide having a catalyst with diesel fuel and then injecting diesel fuel into a combustion chamber of the engine.
  • a combustion chamber of the engine once mixture fuel obtaining by mixing diesel fuel with substance having a catalyst function is injected into the combustion chamber and fuel and fuel additive are burned together in the combustion chamber, metal and metal oxide having a catalyst function are accumulated on the filter along with soot.
  • diesel fuel which is injected later into the combustion chamber of the engine is transferred to an oxidation catalyst together with exhaust gas so that a catalytic combustion is generated, at this time, a temperature of exhaust gas is increased due to a combustion heat.
  • a method for recycling a filter in which combustible liquid fuel which is not burned is directly supplied to filter and organic material captured on a catalyst filter is known through Japanese Patent Laid Open Publication No. 2005-69017.
  • a large amount of liquid fuel is supplied in order to increase sufficiently a temperature of the catalyst filter, captured particles are not oxidized completely on the catalyst filter, and so unburned hydrocarbon or carbon monoxide is in danger of discharging into atmosphere.
  • a surface of the catalyst filter is covered with captured particles, and so it is difficult to burn liquid effectively fuel at a low temperature .
  • an object of the present invention is to provide a system for reducing exhaust gas particles for a vehicle discharging low-temperature exhaust gas which can save the energy consumption and can reduce effectively exhaust gas particles, as compared the conventional technology. Also, another object of the present invention is to provide a system for reducing exhaust gas particles for a vehicle discharging low- temperature exhaust which can increase a temperature of exhaust gas through a catalytically combustion without using an additional elements such as an ignition device to reduce effectively exhaust gas particles.
  • the present invention provides an apparatus for reducing exhaust gas particles in which an injector is provided for injecting diesel fuel to a front end portion of an oxidation catalyst section of a device for reducing exhaust gas particles provided with an exhaust gas entering section provided at one portion of exhaust gas tube, the oxidation catalyst section, a catalyst filter section and an exhaust discharging section, exhaust gas discharged from the engine is mixed with small amount of diesel fuel injected from the injector to burn organic material contained in exhaust gas and diesel fuel through an oxidation-catalyst reaction for increasing a temperature of exhaust gas, high-temperature exhaust gas is transferred to the catalyst filter to burn captured particles by oxygen and a temperature of exhaust gas is lower by a catalytic action of the catalyst filter so that exhaust gas particles can be reduced effectively at a low temperature.
  • the injector unit is installed to inject diesel fuel to a front end portion of the filter provided with the oxidation catalyst section being capable of burning organic material and the catalyst filter section coated with catalyst selected from platinum group metal compound being capable of burning captured particles so that diesel fuel and organic material contained in exhaust gas is catalytically burned at the oxidation catalyst section to increase a temperature of exhaust gas, heated exhaust gas is then transferred to the catalyst filter section, and captured particles are burned at the catalyst filter section by a catalytic action of the catalyst filter section caused by heat and a combustion caused using oxygen, also a combustion temperature is lowered by the catalyst of the catalyst filter section, and so exhaust gas particles can be reduced effectively at a low temperature to recycle the filter.
  • a device for reducing exhaust gas particles provided with only the catalyst filter section in a case that diesel fuel is injected to a front end portion of the catalyst filter section, diesel fuel and exhaust gas particles are simultaneously burned at the catalyst of the catalyst filter, and so a combustion which is exceed its combustion ability is generated to reduce an efficiency for removing exhaust gas particles.
  • hydrocarbon and carbon monoxide generated by imperfect combustion of diesel fuel can be contained so that pollutants can be discharged into atmosphere.
  • exhaust gas particles which are not perfectly burned are not completely burned so that the efficiency in use is very lower. Consequently, the device for reducing exhaust gas particles provided with only the catalyst filter section can not achieve an object of the present invention.
  • diesel fuel is injected to exhaust gas tube it is hard to vaporize completely diesel fuel since diesel fuel is injected at a low temperature. Since diesel fuel is compound of various components, diesel fuel is vaporized within a temperature range of approximately 200-320 ° Q and a temperature of exhaust gas of the vehicle discharging low-temperature exhaust gas is 250 " C or less. In this case, if diesel fuel is injected to an inside of the filter or a front end portion of the filter, only some of injected diesel fuel is vaporized and remnant in liquid phase is mixed with exhaust gas and then entered into the filter.
  • vaporized diesel fuel can be uniformly mixed with exhaust gas and then entered into the catalyst filter in the state that vaporized diesel fuel, mixed with exhaust gas, is properly dispersed.
  • liquid-phase diesel fuel which is not vaporized is flowed to a lower end of the filter due to a different density between liquid-phase fuel diesel and vaporized diesel fuel and then entered in the filter.
  • a temperature of a lower end becomes higher compared with a temperature of an upper end, and the uniform and smooth recycling of the filter is hardly achieved.
  • the amount of injected diesel fuel is larger, the above phenomenon will be more intense, in the worst case, there is a likelihood that a lower end portion of the filter will be broken by a combustion heat of diesel fuel .
  • the oxidation catalyst which burns catalytically organic material contained in exhaust gas and diesel fuel to be injected is placed at a front end of the catalyst filter, injected diesel fuel is burned catalytically at the oxidation catalyst section. At this time, some of diesel fuel which is not vaporized is vaporized by heat generated by a catalytic combustion and then entered to the catalyst filter section although. Therefore, exhaust gas particles captured in the catalyst filter section are burned by vaporized diesel fuel, and so the above mentioned problem of the ununiform recycling is not generated.
  • the oxidation catalyst section is provided at a front end of the filter, although the amount of injection of diesel fuel is large, diesel fuel is sufficiently burned at the oxidation catalyst and the catalyst filter so that it is possible to prevent hydrocarbon which is not burned and carbon monoxide generated by imperfect combustion from discharging in atmosphere .
  • the device for reducing exhaust gas particles is provided with the injector for injecting diesel fuel, the oxidation catalyst section and the catalyst filter section, in the state that a back pressure is not increased remarkably, a mechanism in which an injection of diesel fuel is ceased to convert nitrogen monoxide into nitrogen oxide in the conventional oxidation catalyst and exhaust gas particles are oxidized on the catalyst filer by nitrogen oxide can be applied. Also, if the back pressure is increased, a mechanism in which an injection of diesel fuel is initiated to oxidize diesel fuel on the oxidation filter to increase a temperature of exhaust gas and exhaust gas particles are oxidized on the catalyst filter by oxygen can be properly used.
  • the filter is made of codierite with an excellent heat-resistance property, ceramic containing silicon carbonate (SiC) or alloy comprising nickel alloy or ferro-chrome (FeCr) alloy, and so the filter can be used safely although a temperature of the filter is excessively increased when the filter is recycled, that is, diesel fuel is injected to an inside of the filter to perform a combustion process.
  • the filter is made of heat- resistance material as mentioned above, although soot is excessively accumulated on the filter, the filter can be operated stably against high temperature heat generated when recycling is carried out, and heat generated when excessive soot is oxidized can be utilized so that amount of diesel fuel to be injected can be saved.
  • Fig. 1 is a graph showing a rate of oxidation reaction of soot due to nitrogen oxide and oxygen
  • Fig. 2 is a view illustrating a catalyst filter recycling mechanism due to nitrogen oxide and oxygen
  • Fig. 3 is a side view of a system for reducing exhaust gas particles to which a diesel fuel injection device used in the present invention is applied; and Fig. 4 is a graph showing the results of experiments measuring the recycling ability of a catalyst filter through a diesel fuel injection in a system for reducing exhaust gas particle to which a diesel fuel injection device used in the present invention is applied.
  • diesel oxidation catalyst (DOC) 2 diesel particulate filter (DPF) 3 : pressure sensor 4,7: temperature sensor 5: control unit for data saving, alarm and injector 6: distributor helping mix injected and vaporized diesel fuel and exhaust gas 8: diesel fuel injector 9: diesel fuel pump 10: diesel fuel tube
  • Fig. 1 shows an oxidation rate of exhaust gas particles accumulated on a filter (recycling rate of filter) , for example, a catalyst filter obtained by supporting platinum (Pt) in a silicon carbonate (SiC) filter with heat-resistance.
  • a filter for example, a catalyst filter obtained by supporting platinum (Pt) in a silicon carbonate (SiC) filter with heat-resistance.
  • Maximum converting rate is obtained at a reaction temperature in the range of 250 ⁇ 350°C, if a temperature of exhaust gas of vehicle is frequently out of the above temperature range since the above temperature range is narrow, a recycling of particulate filter can not be occurred smoothly.
  • oxygen (O 2 ) is entered as reaction material, although maximum converting rate is relatively high as 500 ° C or more, a reaction rate is very high and the converting rate is increased in proportion to a temperature.
  • the present invention is further provided with a distributor which can assist a vaporization of diesel fuel injected between the diesel fuel injector and the oxidation catalyst and a mixing of vaporized diesel fuel and exhaust, and so particulate matter can be removed effectively at a low temperature .
  • the present invention is provided with a pressure sensor and a first temperature sensor installed at a front end portion of the distributor or the oxidation catalyst and a second temperature sensor installed at a rear end portion of the catalyst filter of the device for reducing exhaust gas particles.
  • the temperature sensor, the pressure sensor and the diesel fuel injector are electrically- connected to a control unit, the various information on an operation of the engine is stored in the control unit. Accordingly, the control unit controls an operation of the recycling apparatus on the basis of a temperature measured by the temperature sensor and a pressure measured by the pressure sensor and the operation information of engine.
  • Fig. 3 is a view showing one embodiment of the present invention, Fig. 3 shows the system for reducing exhaust gas particles connected to an exhaust tube to which exhaust gas is entered
  • the system for reducing exhaust gas particles comprises an exhaust gas entering section 11 formed at an end portion of a device for reducing exhaust gas particles 20 and connected to a certain portion of an exhaust tube of the engine; a diesel fuel injector 8 for injecting diesel fuel into the device for reducing exhaust gas particles; an oxidation catalyst unit 1 formed at a location adjacent to the diesel fuel injector 8 and burns catalytically the injected diesel fuel and organic material contained in exhaust gas; a catalyst filter unit 2, having a temperature increased by the oxidation catalyst unit 1, for burning particles captured; a diesel fuel pump 9 for supplying fuel to the diesel fuel injector; and a diesel fuel tube 10 connected to an exterior diesel fuel reservoir (not shown in the drawing) .
  • the present invention further comprises a pressure sensor 3 and a first temperature sensor 4 inserted at one side of a front end portion of the oxidation catalyst of the device for reducing exhaust gas particles; a second temperature sensor 7 provided at a rear end portion of the device for reducing exhaust gas particles; and a control unit 5 for controlling a diesel fuel injection of the diesel fuel pump on the basis of the information on the pressure sensor and the temperature sensor stored therein and the information on a status of the engine stored therein.
  • a distributor 6 can be further comprised in the present invention, the distributor is placed at a front end portion of the oxidation catalyst and distributes and mixes smoothly exhaust gas and diesel fuel injected from the diesel fuel injector 8.
  • the pressure applied to the pressure sensor 3 installed at a front end portion of the device for reducing exhaust gas particles placed at a prescribed location of an exhaust gas discharging tube connected to a discharging pipe of the engine is increased by the filter through which exhaust gas particles are filtered. If the value measured in the pressure sensor 3 is larger than the predetermined value, the recycling process is carried out for burning captured exhaust gas particles .
  • Vaporized high-pressure diesel fuel which is pressurized by diesel pump 9 is injected by diesel injector 8.
  • a recycling degree can be measured by measuring a pressure in the pressure sensor 3, however, a recycling degree of the filter can be judged on the basis of the amount of increase of the temperature obtained by measuring a temperature of the second temperature sensor 7 installed at a rear end portion of the filter. Accordingly, the period of injection and the amount of injection of diesel fuel required for the recycling process is adjusted according to a pressure, a temperature and revolutions per minute (RPM) measured during recycling to adjust the recycling degree.
  • RPM revolutions per minute
  • the present invention has an effect that diesel fuel can be oxidized rapidly and perfectly by the oxidation catalyst and the catalyst filter to increase a temperature of exhaust gas, and exhaust gas particles accumulated in the catalyst filter can be removed at short time intervals so that a likelihood of damage of material caused by a thermal shock of the catalyst filter, which can be generated in the case that a temperature of exhaust gas becomes high when exhaust gas is excessively accumulated, becomes lower. Accordingly, the expected life span of material can be more increased and a stability of device is enhanced.
  • the oxidation catalyst serves as a role by which organic material in exhaust gas and the injected diesel fuel can be burned catalytically and the catalyst filter serves as a role by which captured particles are catalytically burned.
  • Example of the oxidation catalyst and the catalyst filter is disclosed in Korea Patent Application No. 10-2004-0012642 filed by the present inventor. If the structural means having functions of the oxidation catalyst and the catalyst filter is adopted, there is no limitation to the oxidation catalyst and the catalyst filter, and so a more detailed description thereon is omitted. Moreover, in the present invention, a catalyst filter with heat-resistance property can be used as the catalyst filter.
  • the catalyst filter with heat-resistance is made of heat-resistance material such as ceramic and the like.
  • a catalytic combustion could be induced by injecting diesel fuel in exhaust gas at a front end portion of the catalyst filter, a temperature of the catalyst filter could be increased rapidly to approximately 260 "C to 400 ° C or more by an injection of diesel fuel and the above temperature condition could be easily maintained for several tens seconds.
  • a pressure measured when a temperature was increased by injecting diesel fuel and captured particles were removed is lower than that measured before a temperature was increased, and so it is possible to know through the above results that a recycling of the soot was well achieved.
  • a flow rate of exhaust gas is lower so that a temperature of the filter can be rapidly increased.
  • the present invention provides the system for reducing exhaust gas particles which can remove effectively accumulated particles in the vehicle discharging low temperature exhaust gas through a catalytic combustion. That is, in the present invention, diesel fuel and organic material contained in exhaust gas are rapidly and preferentially burned through by the oxidation catalyst to increase a temperature of exhaust gas, exhaust gas is then transferred to the catalyst filter on which the catalyst selected from platinum group metal compound is supported, to remove effectively soots captured on the catalyst filter by the catalyst filter whose temperature is increased by the catalytic combustion. Accordingly, as compared with the method in which particulate filter is recycled by injecting diesel fuel to the catalyst filter, particulate filter can be more effectively recycled.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un procédé et un dispositif permettant de recycler un filtre à basse température dans un véhicule duquel s'échappe un gaz d'échappement à basse température. L'invention concerne un procédé permettant d'induire un recyclage de catalyseur, ce procédé consistant à injecter une petite quantité de diesel dans les extrémités avant d'un filtre de catalyseur revêtu d'un catalyseur et d'un catalyseur d'oxydation en tant qu'éléments structurels d'un dispositif permettant de réduire les particules de gaz d'échappement, à brûler le diesel injecté au moyen du catalyseur d'oxydation et à augmenter la température du gaz d'échappement et du filtre au moyen de la chaleur générée pendant la combustion du diesel en vue de brûler les particules de gaz d'échappement piégées par le filtre de catalyseur.
PCT/KR2006/002312 2005-06-30 2006-06-16 Systeme de traitement de gaz d'echappement pour un vehicule a basse temperature d'echappement WO2007004791A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020050058385A KR20070002728A (ko) 2005-06-30 2005-06-30 저온배기차량용 매연저감 시스템
KR10-2005-0058385 2005-06-30

Publications (1)

Publication Number Publication Date
WO2007004791A1 true WO2007004791A1 (fr) 2007-01-11

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WO (1) WO2007004791A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100909704B1 (ko) * 2007-06-20 2009-07-29 한국기계연구원 자동차 배출가스유량 측정장치
WO2009014275A1 (fr) * 2007-07-26 2009-01-29 Sk Energy Co., Ltd. Système de traitement de gaz d'échappement pour véhicule à faible température d'échappement utilisant un injecteur diesel à combustion catalytique
KR102131184B1 (ko) 2014-06-30 2020-07-07 (주)아모레퍼시픽 콜레스테롤 액정을 포함하는 다층상 화장료 조성물

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08170520A (ja) * 1994-12-19 1996-07-02 Mitsubishi Heavy Ind Ltd 内燃機関の排ガス黒煙除去装置
JP2002030919A (ja) * 2000-07-19 2002-01-31 Hino Motors Ltd 排気浄化装置
JP2003193824A (ja) * 2001-12-27 2003-07-09 Hino Motors Ltd 排気浄化装置
JP2004290827A (ja) * 2003-03-27 2004-10-21 Ne Chemcat Corp 軽油燃焼用酸化触媒
JP2005061249A (ja) * 2003-08-20 2005-03-10 Bosch Automotive Systems Corp 排気浄化装置
KR20050047596A (ko) * 2003-11-18 2005-05-23 현대자동차주식회사 디젤 차량의 배기가스 정화시스템

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08170520A (ja) * 1994-12-19 1996-07-02 Mitsubishi Heavy Ind Ltd 内燃機関の排ガス黒煙除去装置
JP2002030919A (ja) * 2000-07-19 2002-01-31 Hino Motors Ltd 排気浄化装置
JP2003193824A (ja) * 2001-12-27 2003-07-09 Hino Motors Ltd 排気浄化装置
JP2004290827A (ja) * 2003-03-27 2004-10-21 Ne Chemcat Corp 軽油燃焼用酸化触媒
JP2005061249A (ja) * 2003-08-20 2005-03-10 Bosch Automotive Systems Corp 排気浄化装置
KR20050047596A (ko) * 2003-11-18 2005-05-23 현대자동차주식회사 디젤 차량의 배기가스 정화시스템

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