WO2008143412A1 - Injecteur pour la régénération d'un dispositif de purification des gaz d'échappement - Google Patents

Injecteur pour la régénération d'un dispositif de purification des gaz d'échappement Download PDF

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Publication number
WO2008143412A1
WO2008143412A1 PCT/KR2008/002540 KR2008002540W WO2008143412A1 WO 2008143412 A1 WO2008143412 A1 WO 2008143412A1 KR 2008002540 W KR2008002540 W KR 2008002540W WO 2008143412 A1 WO2008143412 A1 WO 2008143412A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
jet
injector
subsidiary
diesel fuel
Prior art date
Application number
PCT/KR2008/002540
Other languages
English (en)
Inventor
Yunguen Cho
Sunghwan Kim
Hongseok Jung
Woojin Lee
Sangmin Lee
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.
Priority to EP08753337A priority Critical patent/EP2147197A4/fr
Priority to JP2010509266A priority patent/JP2010528210A/ja
Priority to CN2008800164377A priority patent/CN101680325B/zh
Publication of WO2008143412A1 publication Critical patent/WO2008143412A1/fr

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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
    • F01N3/08—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
    • F01N3/24—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 characterised by constructional aspects of converting apparatus
    • F01N3/36—Arrangements for supply of additional fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • 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
    • 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
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • 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
    • F01N2240/30—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 reformer
    • 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
    • F01N2560/14—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics having more than one sensor of one kind
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/11—Adding substances to exhaust gases the substance or part of the dosing system being cooled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present invention relates to an injector for an exhaust gas purifying device.
  • a diesel vehicle has better durability of engine than that of a gasoline vehicle, with higher efficiency by 20-30%. Due to their excellent performances in terms of fuel efficiency and output of power, diesel vehicles have been applied to large vehicles such as trucks and buses. Furthermore, since diesel vehicles are advantageous in that they cause less global warming with emitting small amount of CO 2 , CO, THC and evaporable hydrocarbons, diesel vehicles have been progressively applied to engines of small and medium sized vehicles. Thus, in developed countries, demand of small and medium sized diesel vehicles increases continuously. However, nitrogen oxides (NO x ) and particulate matter (PM) contained in exhaust of diesel vehicles in a substantial amount are recognized as principal cause of air pollution, constituting up to 40% of entire air pollution. Thus, environmental restrictions are strictly applied to manufacture of diesel vehicles.
  • NO x nitrogen oxides
  • PM particulate matter
  • Counter-techniques to meet the regulations for exhaust of diesel vehicles are classified into two groups: pre-treatment techniques for the purpose of reducing the source of generation of pollutant by means of improvements m fuel, combustion processes or structures of engines; and post- treatment techniques to purify exhaust gas generated, by means of equipment at the exit of exhaust. Though steady researches and developments are achieved in each field, the post- treatment techniques are considered to be more advantageous for practical use, up to the present, so that more researches and developments have been proceeded.
  • Those post-treatment techniques include (1) oxidative catalysts for purifying unburned hydrocarbons m particulate matters (PM), (2) diesel particulate filters (here-m-after, referred to as ⁇ DPF' ) to filter PM, and (3) DeNO x catalytic system to decompose or reduce nitrogen oxides (NO x ) under reductive atmosphere.
  • ⁇ DPF' diesel particulate filters
  • DeNO x catalytic system to decompose or reduce nitrogen oxides (NO x ) under reductive atmosphere.
  • post-treatment systems of hybride type wherein various techniques described above are efficiently combined, such as DPF system equipped with a catalyst filter, are widely employed.
  • particulate matters (PM) in smoke contained in the exhaust gas flowing into a diesel particulate filter is trapped by the diesel particulate filter, to achieve removal of at least 90% of them.
  • PM particulate matters
  • the diesel particulate filter may not only lose its capability of trapping, but also disturb driving of the engine owing to the back pressure thereon.
  • a process for removing PM saturated in the diesel particulate filter (referred to as regeneration) is required.
  • regeneration process widely used is a process wherein diesel fuel is jet to the exhaust gas flowing into the diesel particulate filter to cause spontaneous ignition to raise the temperature of the exhaust, and the hot exhaust gas is flowed into the diesel particulate filter to burn off the PM trapped in the diesel particulate filter.
  • the present invention is to overcome the problems of conventional techniques as described above.
  • the object of the present invention is to provide an injector for an exhaust gas purifying device, which can control the jet amount of diesel fuel more precisely with minimizing the loss of performances owing to deterioration of the injector.
  • the injector (400) employed for a system for purifying exhaust gas comprises an engine (100) ; a fuel tank (200) for supplying diesel fuel, connected to said engine (100); a diesel particulate filter (300) connected to the exit (110) of the engine (100) via an exhaust line (130) for purifying smoke and pollutants from the engine (100) to discharge them outward; an injection unit eguipped on the exhaust line (130) at the fore-end of the diesel particulate filter (300), which is connected to the fuel tank (200), and comprises an injection pipe (521), an injection pump (510), an injector (400) and a circulation pipe (522), in the order; and a control unit (500) which detects and determines the saturated state of said diesel particulate filter (300) to control the operation of the injector (400); and the injector (400) additionally comprises a body (410) connected to the exhaust line (130), subsidiary jet unit (422) provided for the body (
  • the injector (400) comprises a body (410) formed as a box shape and connected to the exhaust line (130), an subsidiary jet unit (422) provided on one side of the body (410), an subsidiary jet circulation line (412) connected to the injection pipe (521) and formed around the subsidiary jet unit (422) for cooling the subsidiary jet unit (422) to provide communication of diesel fuel, an subsidiary jet supplying tube (432) connected to the injection pipe (521) to supply diesel fuel jet into the subsidiary jet unit (422), a temperature raising unit (440) provided inside the body (410) and downstream to said subsidiary jet unit (422), a primary jet unit (421) provided on one side of the body (410) and downstream to said temperature raising unit (440), a primary jet circulation line (411) connected to the injection pipe (521) and formed around the primary jet unit (421) for cooling the primary jet unit (421) to provide communication of diesel fuel, and a primary jet supplying tube (431) connected to the injection pipe (521) to supply diesel fuel jet into the primary jet unit (421) .
  • the temperature raising unit (440) is arranged with at least one unit(s) selected from EHC (electric heated catalyst), thermal cracking, thermal plasma and a glow plug.
  • an injector is cooled, without requiring an additional cooling unit, by utilizing the flow of diesel fuel, to provide efficient cooling of the injector, and thereby resulting in no problems such as additional cost or deficiency of space, which might be otherwise accompanied with improvement of the device. Accordingly, the influence of lowered performances owing to deterioration of the injector is minimized, and the problem of lowered jet efficiency of a nozzle because of carbon deposition around the nozzle upon overheating of the injector can be fundamentally eliminated.
  • the temperature is raised stepwise by using a primary jet unit and an subsidiary jet unit according to the present invention, so that the jet amount of diesel fuel can be more precisely controlled. Therefore, the required amount of diesel fuel jet in order to raise the gas temperature to a predetermined temperature can be reduced, and overall fuel efficiency of the vehicle can be thus improved.
  • FIG. 1 is a schematic diagram of an exhaust purifying system employing an injector according to the present invention .
  • Fig. 2 is a detail cross-sectional view of an injector according to the present invention.
  • Fig. 3 is a detail cross-sectional view of another injector according to the present invention.
  • control unit 600 control unit
  • FIG. 1 shows a schematic diagram of an exhaust gas purifying system employing an injector according to the present invention.
  • the exhaust purifying system employing the injector according to the present invention comprises engine
  • the system according to the present invention as a whole is described in more detail here-in-below.
  • the engine (100) being connected to the fuel tank (200), works by means of diesel fuel supply.
  • Exhaust gas containing smoke generated from the engine (100) is purified when it passes through the diesel particulate filter (300) connected to the exit (110), and discharged through the exhaust pipe (310).
  • the diesel particulate filter (300) employs a variety of post-treatment techniques as described above.
  • DPF diesel particulate filter
  • catalyst-coated filters are generally employed, but any devices to remove pollutants including particulate matters may be provided.
  • diesel fuel should be properly jet from the injector (400) .
  • various methods are employed to measure the degree of saturation in the diesel particulate filter (300) .
  • a RPM sensor (120) in the engine (100), and a pressure sensor (321) and temperature sensors (322, 323) m the diesel particulate filter (300) are provided, and the control unit (600) calculates the degree of saturation by using the variables such as revolution number (rpm) of the engine (100), pressure and temperature, or pressure difference and temperature difference at the fore-end and rear-end of the diesel particulate filter (300), so that operation of injection unit (400) can be properly controlled thereby to adjust the amount of diesel fuel to be jet.
  • Those variables employed by the control unit (600) can be varied diversely depending on the design, and accordingly the location and number of the sensors to be provided.
  • the injecting system employed for regenerating the diesel particulate filter (300) consists of an injection pump (510), an injector (400), an injection pipe (521) and a circulation pipe (522) .
  • the injector (400) jets diesel fuel by the injection pump (510) via the injection pipe (521) .
  • the injector (400) is closed and diesel fuel which was supplied through the injection pipe (521) returns back to the fuel tank (200) via the circulation pipe (522).
  • the injector (400) Since hot exhaust gas continually contacts in the injector (400) and causes ignition at the adjacent sites, the body of said injector (400) continually receives heat from outside, particularly it is further heated by the influence of the engine generating heat of high temperature, to result in temperature raise. Thus, damages of the injector (400) occur in diverse manners, and viability of malfunction increases upon controlling the amount of diesel fuel jet by the injector (400). According to the invention, the injector (400) is efficiently cooled while avoiding such problems, and presented is a structure of an injector which can precisely control the amount of diesel fuel jet by the injector.
  • Fig. 2 and Fig. 3 schematically show structures of the injectors according to the present invention.
  • the injector (400) consists of a body (410) formed as a box shape, a primary jet unit (421) and a subsidiary jet unit
  • the injector (400) is provided at a location before the exhaust gas from the engine flows into the diesel particulate filter (300), as illustrated m Fig. 1, it is influenced by heat possessed by hot exhaust gas itself, as well as by the heat further generated by spontaneous ignition of diesel fuel jet by the jet units (421, 422) .
  • the control unit (600) the heat received by the jet units (421, 422) should be necessarily cooled because the damage of parts due to heat might cause malfunction.
  • a primary jet circulation line (411) and subsidiary jet circulation line (412) are formed in the primary jet unit (421) and the subsidiary jet unit (422), respectively.
  • One side of the circulation line (411, 412) is connected to an injection pipe (521), and the other side is connected to the circulation line (522) to provide communication of diesel fuel.
  • the circulation lines (411, 412) may be simply constituted by the inner space of the double walls formed around the jet units (421, 422), as illustrated in Fig. 2, otherwise any separate pathways may be formed.
  • Those circulation lines (411, 412) may have any form as long as they may communicate diesel fuel inside the circulation lines (411, 412), for example the lines are formed to face one direction, or formed to make a spiral .
  • the body (410) comprises a primary jet unit (421) and a subsidiary jet unit (422) with a primary jet circulation line (411) and a subsidiary circulation line (412) formed on their circumstances, respectively.
  • Air with first temperature rise due to the subsidiary jet unit (422) flows into the primary jet unit (421) to give second temperature rise due to the primary jet unit (421).
  • the subsidiary jet unit (422) about 10% of the diesel fuel needed for heating the exhaust l ⁇
  • gas flowing through the exhaust line (130) is jet to preheat the stream.
  • the air with first temperature rise in the subsidiary jet unit (422) is further heated when it passes through the temperature raising unit (440) provided downstream to the subsidiary jet unit (422) .
  • the temperature raise unit (440) the amount of diesel fuel required to be jet for heating air to a required level can be accordingly saved.
  • remaining 90% of the diesel fuel is further jet by the primary jet unit (421) to generate flame, so that exhaust gas flowing through the exhaust line (130) can be sufficiently heated.
  • the amount diesel fuel to be jet for heating the air to a required level can be much saved as compared to conventional technique, and the amount of diesel fuel can be more precisely controlled.
  • any structure may be constituted without departing from the teachings of the present invention as described above, as long as the air is heated stepwise as it passes through the subsidiary jet unit (422) - the temperature raising unit (440) - and the primary unit (421), sequentially.
  • the temperature raising unit (440) is a device to enable combustion even at a low temperature, and any device employed for the same purpose as described above may be utilized, such as EHC (electric heated catalyst) , thermal cracking, thermal plasma and a glow plug.
  • the circulation lines (411, 421) are directly connected to the fuel tank (200) (Fig. 3), or sequentially connected (Fig. 2). Thus, diesel fuel with minimized influence from heat of the engine (100) can be communicated inside the lines.
  • the circulation lines (411, 421) surround the primary jet unit (421) and the subsidiary jet unit (422) as illustrated. Therefore, heat is withdrawn from the primary jet unit (421) and the subsidiary jet unit (422) by means of diesel fuel communicated through the circulation lines (411, 421), thereby resulting in the effect of cooling those units.

Abstract

La présente invention concerne un injecteur pour un dispositif de purification des gaz d'échappement d'un véhicule diesel. Le but de l'invention est de proposer un injecteur pour un dispositif de purification des gaz d'échappement qui peut commander la quantité de jet de carburant diesel, plus précisément en réduisant au minimum la perte de performances à cause de la détérioration de l'injecteur. Selon la présente invention, un injecteur est refroidi en utilisant le flux de carburant diesel pour avoir un refroidissement efficace de l'injecteur. Par conséquent, l'influence de performances amoindries est réduite au minimum et le problème d'une efficacité de jet amoindrie d'un gicleur peut être fondamentalement éliminée. De plus, selon la présente invention, la quantité de jet de carburant diesel peut être plus précisément régulée. Par conséquent, la quantité nécessaire de jet de carburant diesel afin d'augmenter la température des gaz jusqu'à une température prédéterminée peut être réduite et toute l'efficacité du carburant du véhicule peut donc être améliorée.
PCT/KR2008/002540 2007-05-18 2008-05-06 Injecteur pour la régénération d'un dispositif de purification des gaz d'échappement WO2008143412A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP08753337A EP2147197A4 (fr) 2007-05-18 2008-05-06 Injecteur pour la régénération d'un dispositif de purification des gaz d'échappement
JP2010509266A JP2010528210A (ja) 2007-05-18 2008-05-06 排気浄化装置の再生用インジェクター
CN2008800164377A CN101680325B (zh) 2007-05-18 2008-05-06 用于再生废气净化设备的喷射器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020070048499A KR20080102106A (ko) 2007-05-18 2007-05-18 배기정화장치의 재생용 인젝터
KR10-2007-0048499 2007-05-18

Publications (1)

Publication Number Publication Date
WO2008143412A1 true WO2008143412A1 (fr) 2008-11-27

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Application Number Title Priority Date Filing Date
PCT/KR2008/002540 WO2008143412A1 (fr) 2007-05-18 2008-05-06 Injecteur pour la régénération d'un dispositif de purification des gaz d'échappement

Country Status (5)

Country Link
EP (1) EP2147197A4 (fr)
JP (1) JP2010528210A (fr)
KR (1) KR20080102106A (fr)
CN (1) CN101680325B (fr)
WO (1) WO2008143412A1 (fr)

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CN102959190A (zh) * 2010-06-21 2013-03-06 斯堪尼亚商用车有限公司 与用于排气净化的hc给料系统的给料单元的冷却有关的方法和设备

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JP6036017B2 (ja) * 2012-08-30 2016-11-30 株式会社Ihi バーナ装置
JP6136145B2 (ja) * 2012-08-30 2017-05-31 株式会社Ihi バーナ装置
CN105587378B (zh) * 2014-10-21 2019-01-01 浙江福爱电子有限公司 一种dpf组件
CN110630357B (zh) * 2019-11-05 2021-10-08 尤洛卡（山东）矿业科技有限公司 一种防爆柴油机用尾气冷却净化水箱
CN110714814B (zh) * 2019-11-05 2021-08-31 尤洛卡（山东）矿业科技有限公司 一种防爆柴油机用尾气冷却净化水管

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