KR20080102106A - An injector for regeneration of an exhaust gas purifying device - Google Patents

An injector for regeneration of an exhaust gas purifying device Download PDF

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Publication number
KR20080102106A
KR20080102106A KR1020070048499A KR20070048499A KR20080102106A KR 20080102106 A KR20080102106 A KR 20080102106A KR 1020070048499 A KR1020070048499 A KR 1020070048499A KR 20070048499 A KR20070048499 A KR 20070048499A KR 20080102106 A KR20080102106 A KR 20080102106A
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South Korea
Prior art keywords
injector
injection
injection device
engine
diesel fuel
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KR1020070048499A
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Korean (ko)
Inventor
조연근
김성환
정홍석
이우진
이상민
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에스케이에너지 주식회사
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Priority to KR1020070048499A priority Critical patent/KR20080102106A/en
Priority to JP2010509266A priority patent/JP2010528210A/en
Priority to PCT/KR2008/002540 priority patent/WO2008143412A1/en
Priority to EP08753337A priority patent/EP2147197A4/en
Priority to CN2008800164377A priority patent/CN101680325B/en
Publication of KR20080102106A publication Critical patent/KR20080102106A/en

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    • 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
    • F01N3/08—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
    • 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

Abstract

A regeneration injector of an exhaust emission control system can minimize the influence of performance reduction due to the deterioration of injector and control the injection rate of diesel fuel more precisely. A regeneration injector of an exhaust emission control system includes an engine; a fuel tank(200) which is connected to the engine and supplies diesel fuel; a diesel particulate filter which discharges after purifying the smoke and pollutant of the gas exhausted from the engine; an injector equipped on an exhaust line(130) with an injection nozzle(521), an injection pump(510), an injector(400) and a circulating pipe(522); and a controller which detects and determines the saturated state of the diesel particulate filter and controls the operation of the injector. The injector comprises a body(410), an auxiliary injector(422), a heat-riser(440) and a main injector(421).

Description

배기정화장치의 재생용 인젝터 {An Injector for Regeneration of an Exhaust Gas Purifying Device}An Injector for Regeneration of an Exhaust Gas Purifying Device}

도 1은 본 발명에 의한 인젝터를 채용하는 배기정화장치의 시스템도.1 is a system diagram of an exhaust purification apparatus employing the injector according to the present invention.

도 2는 본 발명에 의한 인젝터의 상세 단면도.2 is a detailed cross-sectional view of the injector according to the present invention.

**도면의 주요부분에 대한 부호의 설명**** Description of the symbols for the main parts of the drawings **

100: 엔진 110: 배기구100: engine 110: exhaust port

120: RPM센서 130: 배기라인120: RPM sensor 130: exhaust line

200: 연료탱크 200: fuel tank

300: 매연저감장치 310: 배기관300: smoke reduction device 310: exhaust pipe

321: 압력센서 322, 323: 온도센서321: pressure sensor 322, 323: temperature sensor

400: (본 발명에 의한) 인젝터400: injector (according to the invention)

410: 몸체410: body

411: 주분사순환로 412: 보조분사순환로411: main injection circulation 412: auxiliary injection circulation

421: 주분사장치 422: 보조분사장치421: main injection device 422: auxiliary injection device

431: 주분사공급관 432: 보조분사공급관431: main injection supply pipe 432: auxiliary injection supply pipe

440: 승온장치440: temperature riser

510: 주입펌프510: injection pump

521: 주입관 522: 순환관521: injection tube 522: circulation tube

600: 제어부600: control unit

본 발명은 배기정화장치용 인젝터에 관한 것이다.The present invention relates to an injector for an exhaust purification apparatus.

디젤 자동차는 가솔린 자동차에 비하여 엔진의 내구성이 높고 효율이 20~30% 가량이나 높아 연비 및 출력 면에서 성능이 우수하여 주로 트럭 및 버스 등 대형차량에 적용되어 왔다. 또한 디젤 자동차는 CO2, CO, THC 및 증발탄화수소의 양이 적어 지구온난화를 덜 유발시킨다는 장점 또한 갖추고 있기 때문에, 점차로 중소형차량용 엔진에도 디젤 엔진을 사용하는 기술이 적용되면서, 선진 각국에서는 이러한 중소형 디젤 자동차의 수요가 계속 증가하고 있다. 그러나 디젤 자동차의 배기가스에 다량 포함되어 있는 질소산화물(NOx)과 입자상물질(PM, Particulate Matter)은 총 대기오염의 40%를 차지 할 정도로 대기오염의 주범으로 인식되며, 그 때문에 디젤 자동차의 생산 시에는 환경적 규제가 엄격하게 적용되고 있다. 질소산화물과 입자상물질의 배출량 기준에는 각국 상호간에 타협관계(trade-off)가 있으며, 더불어 각국은 정책적 요구에 따라 그 발생 정도를 조절하고 있다. 그러나 고유가 시대에 있어서 종래의 가솔린 자동차에 비해 보다 효율이 좋은 디젤 자동차가 각광받아 가고 있으며, 이에 따라 디젤 자동차의 생산에 비례하여 발생하는 대기오염물질의 배출량을 줄이기 위하여 선진 각국에서는 디젤 엔진의 배기가스 오염물질 포함량에 대한 규제를 점점 강화시켜 가고 있는 추세이다.Diesel cars have high engine durability and efficiency of 20-30% compared to gasoline cars, and have excellent performance in terms of fuel efficiency and power, and have been mainly applied to large vehicles such as trucks and buses. In addition, diesel vehicles have the advantage of low global warming due to the low amount of CO 2 , CO, THC and evaporated hydrocarbons. The demand for cars continues to grow. However, nitrogen oxides (NO x ) and particulate matter (PM) contained in a large amount of exhaust gas of diesel cars are recognized as the main cause of air pollution, accounting for 40% of the total air pollution. In production, environmental regulations are strictly applied. There are trade-offs between countries in terms of emissions of nitrogen oxides and particulate matter, and each country regulates the degree of occurrence according to policy requirements. However, in the era of high oil prices, diesel cars, which are more efficient than conventional gasoline cars, have been spotlighted. Accordingly, in order to reduce the emission of air pollutants generated in proportion to the production of diesel cars, developed countries have exhausted diesel engine exhaust gas. Increasingly, regulations on pollutant content are being tightened.

디젤 엔진의 배기가스 규제를 만족시키기 위한 대응기술로는 연료의 개선ㆍ연소 방법의 개선ㆍ엔진의 개량 등 오염물질이 원천적으로 적게 발생하도록 하는 데 목적이 있는 전처리 기술과, 배기가스 배출구에 장착하여 발생된 배기가스를 정화하는 후처리 기술로 나뉜다. 각 분야에서 꾸준한 연구와 개발이 이루어지고 있으나 현재로서는 후처리 기술이 상용화에 보다 유리하다고 평가되고 있고, 따라서 후처리 기술에 대하여 보다 많은 연구ㆍ개발이 이루어지고 있는 실정이다. 이러한 후처리 기술로는, (1) 입자상물질(PM)중 미연소 탄화수소를 정화하기 위한 산화촉매, (2) 입자상물질(PM)을 필터로 걸러주는 입자상물질 제거용 필터(Diesel Particulate Filter; 이하 'DPF'라 함), (3) 환원 분위기 하에서 질소산화물(NOx)을 분해 또는 환원하는 DeNOx 촉매 시스템 등이 있는데, 현재에는 상술한 여러 가지 기술들을 효과적으로 조합한 시스템, 즉 예를 들면 촉매 필터를 구비하는 DPF 시스템 등과 같은 하이브리드형 후처리 장치들이 널리 사용되고 있다.As a countermeasure to satisfy the exhaust gas regulation of diesel engines, pretreatment technology aimed at reducing the source of pollutants such as fuel improvement, combustion method improvement, and engine improvement, and the exhaust gas exhaust port, It is divided into post-treatment technology to purify the generated exhaust gas. Although steady research and development is being conducted in each field, post-treatment technology is currently considered to be more advantageous for commercialization, and thus, more research and development is being conducted on post-treatment technology. Such post-treatment techniques include (1) an oxidation catalyst for purifying unburned hydrocarbons in particulate matter (PM), and (2) a diesel particulate filter for filtering particulate matter (PM) through a filter; (3) DeNO x catalyst system for decomposing or reducing nitrogen oxides (NO x ) under a reducing atmosphere. Currently, a system that effectively combines various techniques described above, for example, a catalyst Hybrid post-processing devices such as DPF systems with filters are widely used.

종래의 배기정화 시스템에서, 매연저감장치로 유입되는 배출가스에 포함되는 매연 중 입자상물질(PM)은 상기 매연저감장치에 의해 포집(trapping)됨으로써 90% 이상 제거가 가능하다. 입자상물질이 포화되면 매연저감장치의 포집 능력이 상실될 뿐만 아니라 엔진에 역압이 걸려 엔진의 구동을 방해하게 될 가능성이 있으므로, 상기 입자상물질을 제거하는 과정이 필요하며, 이렇게 매연저감장치에 포화되어 있는 입자상물질을 제거하는 과정을 재생(regeneration)이라고 한다. 이러한 재생 방법으로는 일반적으로, 디젤 연료를 매연저감장치로 유입되는 배출가스에 분사하여 자연 발화시킴으로써 배출가스의 온도를 상승시키고, 고온의 배출가스를 매연저감장치에 유입시킴으로써 매연저감장치에 포집되어 있는 입자상물질을 연소시켜 제거하는 방법이 널리 사용된다.In the conventional exhaust purification system, particulate matter (PM) in the smoke included in the exhaust gas flowing into the smoke reduction device is trapped by the smoke reduction device, and thus 90% or more can be removed. When the particulate matter is saturated, the collection capability of the particulate matter reducing device is not only lost, and the engine may be counter-pressured to interfere with the driving of the engine. Therefore, the particulate matter is removed, and thus the particulate matter is saturated. The process of removing particulate matter is called regeneration. In general, such a regeneration method injects diesel fuel into the exhaust gas flowing into the smoke reduction device to spontaneously ignite the temperature of the exhaust gas, and collects the high temperature exhaust gas into the smoke reduction device by collecting it. The method of burning and removing particulate matter present is widely used.

이와 같은 방식의 배기정화 시스템에 있어서 몇 가지 문제점이 지적되고 있다. 상술한 바와 같이 매연저감장치를 재생하는 과정에서, 인젝터는 계속해서 고온의 가스와 접촉하게 되기 때문에 인젝터 자체의 온도가 상승하게 된다. 특히 고온의 열을 방출하는 엔진의 영향을 받아 더욱 인젝터의 온도가 상승하게 될 수도 있다. 그런데, 인젝터의 온도가 상승하게 되면 배출가스 내에 함유되어 있는 탄소퇴적물(carbon deposit)이 인젝터 노즐 부위에 접착되며, 이에 따라 노즐의 분사 효율이 떨어지고 노즐 부위에 손상이 발생하게 되는 문제가 생긴다. 뿐만 아니라 인젝터 몸체의 열화에 의하여 인젝터 자체의 수명이 감소되며 전체적인 작동이 불안정하게 되어 제어가 어려워지게 되고, 이에 따라 디젤 연료의 소비량이 많아져 전체적인 연비를 나쁘게 하는 원인으로 지적되고 있다. 이와 같이 인젝터의 온도 상승에 따른 여러 가지 문제점이 발생되는 바, 이러한 문제를 해결하기 위한 당업자 및 사용자들의 요구가 꾸준히 있어 왔다.Several problems have been pointed out in this type of exhaust purification system. As described above, in the process of regenerating the smoke reducing device, the temperature of the injector itself is increased because the injector is continuously in contact with the hot gas. In particular, the temperature of the injector may be further increased under the influence of an engine emitting high heat. However, when the temperature of the injector rises, carbon deposits contained in the exhaust gas are adhered to the injector nozzle portion, which causes a problem that the injection efficiency of the nozzle is reduced and damage occurs at the nozzle portion. In addition, due to deterioration of the injector body, the life of the injector itself is reduced, and the overall operation becomes unstable, making it difficult to control. Accordingly, it is pointed out that the consumption of diesel fuel is increased, thereby deteriorating the overall fuel efficiency. As a result of various problems caused by the temperature rise of the injector, there has been a constant demand of those skilled in the art and users to solve such problems.

따라서, 본 발명은 상기한 바와 같은 종래 기술의 문제점을 해결하기 위하여 안출된 것으로, 본 발명의 목적은 인젝터의 열화에 의한 성능 저감의 영향을 최소화하고 보다 정밀하게 디젤 연료의 분사량을 조절할 수 있는 배기정화장치용 인젝터를 제공함에 있다.Accordingly, the present invention has been made to solve the problems of the prior art as described above, the object of the present invention is to minimize the impact of the performance reduction due to deterioration of the injector and to exhaust the exhaust gas that can more precisely control the injection amount of diesel An injector for a purification device is provided.

상기한 바와 같은 목적을 달성하기 위한 본 발명의 배기정화장치용 인젝터는, 엔진(100); 상기 엔진(100)과 연결되어 디젤 연료를 공급하는 연료탱크(200); 상기 엔진(100)의 배기구(110)와 배기라인(130)으로 연결되어 상기 엔진(100)으로부터 배출되는 가스의 매연 및 공해물질을 정화하여 외부로 배출하는 매연저감장치(300); 상기 연료탱크(200)와 연결되며 주입관(521), 주입펌프(510), 인젝터(400) 및 순환관(522)을 순차적으로 포함하여 이루어져 상기 매연저감장치(300) 전단의 배기라인(130) 상에 구비되는 주입수단; 및 상기 매연저감장치(300)의 포화 상태를 감지하여 판단하고 상기 인젝터(400)의 작동을 제어하는 제어부(500);를 포함하여 이루어지는 배기정화시스템에 채용되는 인젝터(400)에 있어서, 상기 인젝터(400)는 상기 배기라인(130)에 연결되는 몸체(410), 상기 몸체(410)에 구비되는 보조분사장치(422), 상기 보조분사장치(422)의 하류에 구비되는 승온장치(440) 및 상기 승온장치(440)의 하류에 구비되는 주분사장치(421)을 포함하여 이루어져, 상기 보조분사장치(422) - 상기 승온장치(440) - 상기 주분사장치(421) 순으로 순차적으로 공기를 유통시켜 단계적으로 승온하는 것을 특징으로 한다.Injector for exhaust purification apparatus of the present invention for achieving the above object, the engine 100; A fuel tank 200 connected to the engine 100 to supply diesel fuel; A smoke reduction device (300) connected to an exhaust port (110) of the engine (100) and an exhaust line (130) to purify the soot and pollutants of the gas discharged from the engine (100) and discharge it to the outside; The exhaust line 130 is connected to the fuel tank 200 and includes an injection pipe 521, an injection pump 510, an injector 400, and a circulation pipe 522, in sequence, in front of the smoke reduction device 300. Injection means provided on the; And a controller 500 for sensing and determining the saturation state of the smoke reduction device 300 and controlling the operation of the injector 400. The injector 400 employed in an exhaust purification system comprising: the injector 400 is a body 410 connected to the exhaust line 130, the auxiliary injection device 422 provided on the body 410, the temperature raising device 440 provided downstream of the auxiliary injection device 422 And a main injection device 421 provided downstream of the temperature increasing device 440, the air being sequentially supplied to the auxiliary injection device 422-the temperature increasing device 440-the main injection device 421. It is characterized by circulating step by step temperature.

이 때, 상기 인젝터(400)는 함체 형태로 형성되어 상기 배기라인(130)에 연결되는 몸체(410), 상기 몸체(410)의 일측에 구비되는 보조분사장치(422), 상기 보조분사장치(422)를 냉각하도록 상기 주입관(521)과 연결되어 상기 보조분사장치(422)의 둘레에 형성되어 디젤 연료를 유통시키는 보조분사순환로(412), 상기 주입관(521)과 연결되어 상기 보조분사장치(422)로 분사되는 디젤 연료를 공급하는 보조분사공급관(432), 상기 몸체(410) 내부 및 상기 보조분사장치(422)의 하류 측에 구비되는 승온장치(440), 상기 몸체(410)의 일측 및 상기 승온장치(440)의 하류 측에 구비되는 주분사장치(421), 상기 주분사장치(421)를 냉각하도록 상기 주입관(521)과 연결되어 상기 주분사장치(421)의 둘레에 형성되어 디젤 연료를 유통시키는 주분사순환로(411), 상기 주입관(521)과 연결되어 상기 주분사장치(421)로 분사되는 디젤 연료를 공급하는 주분사공급관(431)을 포함하여 이루어지는 것을 특징으로 한다.At this time, the injector 400 is formed in the shape of a housing body 410 connected to the exhaust line 130, the auxiliary injection device 422 provided on one side of the body 410, the auxiliary injection device ( It is connected to the injection pipe 521 to cool the 422 is formed around the auxiliary injection device 422, the auxiliary injection circulation path 412 for distributing diesel fuel, the auxiliary injection pipe 521 is connected to the auxiliary injection Auxiliary injection supply pipe 432 for supplying the diesel fuel injected into the device 422, the temperature increaser 440, the body 410 is provided inside the body 410 and downstream of the auxiliary injection device 422 The main injection device 421 provided on one side of the and the downstream side of the temperature raising device 440, the peripheral portion of the main injection device 421 is connected to the injection pipe 521 to cool the main injection device 421. Is formed in the main injection circulation passage 411 for distributing diesel fuel, the inlet pipe 521 is connected to the And characterized by comprising comprises a main injection supply line 431 for supplying diesel fuel to be injected by injection device 421.

더불어, 상기 승온장치(440)는 EHC(Electric Heated Catalyst), 개질촉매(Thermal Cracking), 열분해 플라즈마(Thermal Plasma), 예열플러그(Glow Plug) 중에서 선택되는 어느 하나 이상이 배치되는 장치인 것을 특징으로 한다.In addition, the temperature raising device 440 is a device in which any one or more selected from an electric heated catalyst (EHC), a thermal cracking catalyst, a thermal decomposition plasma, and a glow plug is disposed. do.

이하, 상기한 바와 같은 구성을 가지는 본 발명에 의한 배기정화장치용 인젝터를 첨부된 도면을 참고하여 상세하게 설명한다.Hereinafter, an injector for exhaust purification apparatus according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 인젝터가 채용되는 배기정화시스템을 간략하게 도시한 것 이다. 본 발명에 의한 인젝터가 채용되는 배기정화 시스템은, 엔진(100); 상기 엔진(100)과 연결되어 디젤 연료를 공급하는 연료탱크(200); 상기 엔진(100)의 배기구(110)와 배기라인(130)으로 연결되어 상기 엔진(100)으로부터 배출되는 가스의 매연 및 공해물질을 정화하여 외부로 배출하는 매연저감장치(300); 상기 매연저감장치(300) 전단의 배기라인(130) 상에 구비되어 상기 매연저감장치(300)가 포화 상태인 경우 디젤 연료를 분사하여 자연 발화시킴으로써 상기 매연저감장치(300)로 유입되는 배출가스의 온도를 상승시켜 상기 매연저감장치(300)를 재생시키고 상기 매연저감장치(300)가 포화 상태가 아닌 경우 폐쇄되는 인젝터(400); 일측이 상기 연료탱크(200)와 연결되며 타측이 상기 인젝터(400)와 연결되는 주입관(521); 상기 주입관(521) 상에 구비되어 디젤 연료를 유통시키는 주입펌프(510); 일측이 상기 인젝터(400)와 연결되며 타측이 상기 연료탱크(200)와 연결되어 상기 인젝터(400)가 폐쇄 시 상기 주입관(521)을 통해 흘러온 디젤 연료를 다시 상기 연료탱크(200)로 돌려보내는 순환관(522); 및 상기 매연저감장치(300)의 포화 상태를 감지하여 판단하고 상기 인젝터(400)의 작동을 제어하는 제어부(600);를 포함하여 이루어진다. 하기에 본 발명의 시스템 전반에 대해 보다 상세히 설명한다.Figure 1 shows a simplified illustration of the exhaust purification system employing the injector of the present invention. Exhaust purification system employing the injector according to the present invention, the engine 100; A fuel tank 200 connected to the engine 100 to supply diesel fuel; A smoke reduction device (300) connected to an exhaust port (110) of the engine (100) and an exhaust line (130) to purify the soot and pollutants of the gas discharged from the engine (100) and discharge it to the outside; It is provided on the exhaust line 130 in front of the smoke reduction device 300, when the smoke reduction device 300 is saturated, the exhaust gas flowing into the smoke reduction device 300 by spontaneous ignition by injecting diesel fuel An injector 400 which regenerates the smoke reduction device 300 by raising the temperature of the injection and is closed when the smoke reduction device 300 is not saturated; An injection pipe 521 having one side connected to the fuel tank 200 and the other side connected to the injector 400; An injection pump 510 provided on the injection pipe 521 to distribute diesel fuel; One side is connected to the injector 400 and the other side is connected to the fuel tank 200 to turn the diesel fuel flowing through the injection pipe 521 back to the fuel tank 200 when the injector 400 is closed. Outgoing circulation pipe 522; And a controller 600 for detecting and determining the saturation state of the smoke reduction device 300 and controlling the operation of the injector 400. The following describes the overall system of the present invention in more detail.

엔진(100)은 연료탱크(200)와 연결되어 디젤 연료를 공급받아 일을 하게 된다. 상기 엔진(100)에서 발생된 매연을 포함하는 배출가스는 배기구(110)와 연결된 매연저감장치(300)를 통과하면서 정화되어 배기관(310)을 통해 배출된다. 상기 매연저감장치(300)는 상술한 바와 같은 여러 가지 후처리 기술들을 사용하는 장치로서, 일반적으로는 촉매를 입힌 필터를 구비하는 DPF 시스템이 널리 사용되고 있으 며, 입자상물질을 포함하는 공해물질을 제거하는 장치라면 어떤 형태의 장치가 구비되어도 무방하다.The engine 100 is connected to the fuel tank 200 to receive diesel fuel and work. Exhaust gas including soot generated in the engine 100 is purified while passing through the smoke reduction device 300 connected to the exhaust port 110 is discharged through the exhaust pipe (310). The smoke reduction device 300 is a device using various post-treatment techniques as described above. In general, a DPF system having a catalyst-filtered filter is widely used and removes pollutants including particulate matter. Any type of device may be provided as long as it is a device.

매연저감장치(300)에 입자상물질이 포화되거나 포화에 가까워지면, 입자상물질의 포집 능력이 감소되게 되며 또한 역압력이 걸려 엔진의 구동에 심각한 문제를 발생시킬 수 있으므로, 이를 방지하기 위한 대책이 필요하다. 매연저감장치(300)의 입구 측에 상기 연료탱크(200)와 연결된 인젝터(400)를 구비하고, 배출가스에 디젤 연료를 분사하여 자연발화가 일어나도록 함으로써 상기 매연저감장치(300)에 유입되는 배출가스의 온도를 강제적으로 상승시키게 되면, 매연저감장치(300)의 내부에 포화되어 있는 입자상물질들이 상기 고온의 배출가스에 의해 연소에 의하여 제거될 수 있게 된다.When particulate matter saturates or approaches saturation in the smoke reduction device 300, the trapping ability of particulate matter decreases and a back pressure may occur, which may cause serious problems in driving the engine. Do. An injector 400 connected to the fuel tank 200 is provided at an inlet side of the smoke reduction device 300 and injected into the smoke reduction device 300 by injecting diesel fuel into exhaust gas so that spontaneous combustion occurs. When the temperature of the exhaust gas is forcibly raised, particulate matter saturated in the smoke reduction device 300 may be removed by combustion by the high temperature exhaust gas.

이 때, 상술한 바와 같이 매연저감장치(300)를 재생하기 위해서는 적절하게 상기 인젝터(400)에서 디젤 연료를 분사해 주어야 하기 때문에, 상기 매연저감장치(300)의 포화 정도를 측정하기 위하여 여러 가지 방법이 사용된다. 현재 일반적으로는 엔진(100)에 RPM센서(120), 매연저감장치(300)에 압력센서(321) 및 온도센서(322, 323)를 구비함으로써 엔진(100)의 회전수(rpm 값) 및 매연저감장치(300) 전ㆍ후단의 압력 및 온도 또는 압력차 및 온도차와 같은 변수들을 사용하여 제어부(600)가 포화 정도를 산출하고, 이에 따라 적절하게 인젝터(400)의 작동을 제어하여 분사될 디젤 연료의 양을 조절하게 된다. 물론 상기 제어부(600)가 사용하는 변수는 설계에 따라 다양하게 변경될 수 있고, 이에 따라 상기 센서들이 구비되는 위치나 개수 등도 다양하게 달라질 수 있다.In this case, in order to regenerate the smoke reduction device 300 as described above, since the diesel fuel must be properly injected from the injector 400, various methods for measuring the saturation degree of the smoke reduction device 300 are provided. Method is used. Currently, the engine 100 is provided with an RPM sensor 120, a smoke reduction device 300, a pressure sensor 321, and a temperature sensor 322, 323. The controller 600 calculates the degree of saturation by using variables such as the pressure and temperature before and after the smoke reduction device 300 or the pressure difference and the temperature difference, and accordingly controls the operation of the injector 400 to be injected. To control the amount of diesel fuel. Of course, the variable used by the controller 600 may be changed in various ways according to the design, and accordingly, the position or number of the sensors may be variously changed.

매연저감장치(300)를 재생하기 위해 사용되는 인젝팅 시스템은 일반적으로 도 1에 도시된 바와 같이 주입펌프(510), 인젝터(400), 주입관(521) 및 순환관(522)으로 이루어진다. 인젝터(400)는 상술한 바와 같이 매연저감장치(300)가 포화 상태가 되었을 때 또는 포화 상태에 가까워졌을 때 상기 주입펌프(510)가 주입관(521)을 통해 공급하는 디젤 연료를 분사하게 된다. 그러나 매연저감장치(300)가 포화 상태가 아니어서 분사가 필요하지 않을 경우에는, 상기 인젝터(400)는 폐쇄되며 주입관(521)을 통해 공급되었던 디젤 연료는 순환관(522)을 통해 다시 연료탱크(200)로 순환하여 돌아온다.The injecting system used to regenerate the smoke reduction device 300 generally includes an injection pump 510, an injector 400, an injection tube 521, and a circulation tube 522, as shown in FIG. 1. As described above, the injector 400 injects the diesel fuel supplied by the injection pump 510 through the injection pipe 521 when the smoke reduction device 300 is saturated or near to saturation. . However, when the smoke reduction device 300 is not saturated and injection is not necessary, the injector 400 is closed and the diesel fuel supplied through the injection pipe 521 is again fueled through the circulation pipe 522. Circulate back to the tank (200).

그런데, 이와 같이 인젝터(400)에서는 지속적으로 고온의 배출가스가 접촉할 뿐만 아니라 인접 부위에서 발화가 일어나게 되기 때문에 상기 인젝터(400)의 몸체는 외부에서 계속해서 열을 받게 되며, 특히 고온의 열을 방출하는 엔진의 영향에 의하여 더욱 열을 받게 되어 온도가 상승하게 된다. 따라서 여러 가지 방법으로 인젝터(400)의 손상이 발생하게 되며, 인젝터(400)에 의해 분사되는 디젤 연료의 양을 제어함에 있어서도 오동작이 발생될 가능성이 높아지게 된다. 본 발명에서는 이러한 문제점을 제거하기 위하여 효과적으로 인젝터(400)를 냉각할 뿐만 아니라 상기 인젝터(400)에 의해 분사되는 디젤 연료의 양을 정밀하게 제어할 수 있도록 하는 인젝터(400)의 구조를 제시한다.However, in the injector 400 as described above, the body of the injector 400 continuously receives heat from the outside because the hot exhaust gas is continuously contacted and ignition occurs in an adjacent area. The heat of the engine is further increased by the effect of the releasing engine and the temperature rises. Therefore, damage to the injector 400 occurs in various ways, and the possibility of malfunction occurs even in controlling the amount of diesel fuel injected by the injector 400. The present invention proposes a structure of the injector 400 that not only cools the injector 400 effectively, but also precisely controls the amount of diesel fuel injected by the injector 400 in order to eliminate this problem.

도 2 및 도 3은 본 발명에 의한 인젝터의 개략적인 구조도이다. 본 발명의 인젝터(400)는 도시된 바와 같이, 함체 형태로 형성되는 몸체(410)와, 상기 몸체 (410)에 구비되는 주분사장치(421) 및 보조분사장치(422), 그리고 승온장치(440)를 포함하여 구성된다. 상기 인젝터(400)는 도 1에 도시된 바와 같이 엔진으로부터 배출되는 가스가 매연저감장치(300)에 유입되기 전의 위치에 구비되기 때문에, 고온의 배출가스 자체가 가지고 있는 열의 영향을 받을 뿐 아니라, 상기 분사장치들(421, 422)에 의해 분사된 디젤 연료가 자연 발화함으로써 더 발생되는 열에 의해서도 영향을 받게 된다. 특히 상기 분사장치들(421, 422)은 제어부(600)에 의하여 그 동작을 제어받고 있는 바, 열에 의하여 부품이 손상되는 경우 오동작을 발생시키게 될 우려가 있으므로 상기 분사장치들(421, 422)이 받는 열을 냉각시켜 주어야 할 필요가 있다.2 and 3 is a schematic structural diagram of an injector according to the present invention. As shown in the injector 400 of the present invention, the body 410 is formed in the form of a housing, the main injection device 421 and the auxiliary injection device 422 provided in the body 410, and the temperature raising device ( 440). Since the injector 400 is provided at a position before the gas discharged from the engine is introduced into the smoke reduction device 300 as shown in FIG. 1, the injector 400 is not only affected by the heat of the high-temperature exhaust gas itself. Diesel fuel injected by the injectors 421 and 422 is also affected by heat generated by spontaneous combustion. In particular, the injectors 421 and 422 are controlled by the control unit 600. When the parts are damaged by heat, the injectors 421 and 422 may be malfunctioned. It is necessary to cool the heat received.

상기 주분사장치(421) 및 상기 보조분사장치(422)에는 각각 주분사순환로(411) 및 보조분사순환로(412)가 형성되며, 상기 순환로들(411, 412)은 일측에 주입관(521)이 연결되고 타측(522)에 순환관(522)이 연결되어 디젤 연료를 유통시키도록 되어 있다. 상기 순환로들(411, 412)은 도 2에 도시된 바와 같이 단순히 상기 분사장치들(421, 422)의 둘레에 형성되는 이중 벽면 내부 공간으로 이루어져도 무방하며, 또는 별도의 통로가 형성되어 이루어져도 무방하다. 즉, 상기 순환로들(411, 412)이 한쪽 방향으로만 향하도록 형성되거나, 나선을 그리도록 형성되는 등, 상술한 바와 같이 순환로들(411, 412) 내부로 디젤 연료를 유통시킬 수 있는 형태라면 어떤 형태로 이루어져도 무방하다.The main injection device 421 and the auxiliary injection device 422 are formed with a main injection circulation path 411 and an auxiliary injection circulation path 412, respectively, and the circulation paths 411 and 412 are injection pipes 521 on one side thereof. The connection and the circulation pipe 522 is connected to the other side 522 to distribute the diesel fuel. The circulation paths 411 and 412 may be simply formed of a double wall inner space formed around the injectors 421 and 422 as shown in FIG. 2, or may be formed by a separate passage. It's okay. That is, when the circulation paths 411 and 412 are formed to face only one direction or are formed to draw a spiral, and the like, as described above, the diesel fuel can be distributed into the circulation paths 411 and 412. It may be in any form.

이와 같이 상기 몸체(410)에는 각각 그 둘레에 주분사순환로(411) 및 보조분사순환로(412)가 형성되어 있는 주분사장치(421)와 보조분사장치(422)가 구비되는 데, 상기 보조분사장치(422)에 의해 1차 승온된 공기가 주분사장치(421) 쪽으로 흘러와 주분사장치(421)에 의하여 2차 승온되는 구조로서 구비되게 된다. 상기 보조분사장치(422)에서는 배기라인(130)에 흐르는 배기가스를 가열하기 위하여 필요한 디젤 연료의 10% 정도를 분사하여 미리 흐름을 가열한다. 이와 같이 보조분사장치(422)에서 1차로 승온된 공기는, 상기 보조분사장치(422)의 하류에 구비된 승온장치(440)를 거치면서 더욱 승온된다. 이와 같이 상기 승온장치(440)로 인하여 필요한 만큼 공기를 가열하기 위하여 분사해야 하는 디젤 연료의 양을 절약할 수 있다. 상기 승온장치(440)를 거쳐 나온 공기에, 상기 주분사장치(421)에서 나머지 90% 정도의 디젤 연료를 더 분사함으로써 화염을 생성시키고, 이에 따라 배기라인(130)을 따라 흐르는 배기가스가 충분히 가열될 수 있게 된다.As such, the main body 410 is provided with a main injection device 421 and an auxiliary injection device 422 having a main injection circulation path 411 and an auxiliary injection circulation path 412 formed around the main injection device 422, respectively. The air heated up primarily by the device 422 flows toward the main injection device 421 and is provided as a structure in which the temperature is secondaryly increased by the main injection device 421. The auxiliary injection device 422 injects about 10% of the diesel fuel required to heat the exhaust gas flowing in the exhaust line 130 to heat the flow in advance. As such, the air heated up primarily by the auxiliary injection device 422 is further heated while passing through the temperature raising device 440 provided downstream of the auxiliary injection device 422. As such, the temperature increaser 440 may save the amount of diesel fuel that needs to be injected to heat the air as necessary. The main injection device 421 further injects the remaining 90% of diesel fuel into the air passing through the temperature raising device 440 to generate a flame, and thus exhaust gas flowing along the exhaust line 130 is sufficiently supplied. It can be heated.

이와 같이 본 발명에 의하면, 공기가 보조분사장치(422) - 승온장치(440) - 주분사장치(421)를 순차적으로 통과하면서 단계적으로 가열되기 때문에, 필요한 만큼 공기를 가열하기 위하여 분사해야 하는 디젤 연료의 양을 종래보다 훨씬 절약할 수 있으며, 더불어 디젤 연료의 양을 훨씬 정밀하게 조절할 수 있게 된다. 물론, 본 실시예에 언급되어 있지 않은 형태라 하더라도 상술한 바와 같은 본 발명의 취지, 즉 공기가 보조분사장치(422) - 승온장치(440) - 주분사장치(421)를 순차적으로 통과하면서 단계적으로 가열되도록 하는 구조를 벗어나지 않는 형태라면 어떠한 형태로 구성되어도 무방하다.As described above, according to the present invention, since the air is heated step by step while sequentially passing through the auxiliary injection device 422-the temperature raising device 440-the main injection device 421, the diesel which must be injected to heat the air as necessary. The amount of fuel can be saved much more than before, and the amount of diesel fuel can be controlled more precisely. Of course, even if the form is not mentioned in the present embodiment, the purpose of the present invention as described above, that is, the air is stepwise while sequentially passing through the auxiliary injection device 422-temperature raising device 440-main injection device 421 Any form may be used as long as it does not deviate from the structure to be heated.

상기 승온장치(440)는 저온에서도 연소가 일어날 수 있도록 하기 위한 장치로서, EHC(Electric Heated Catalyst), 개질촉매(Thermal Cracking), 열분해 플라 즈마(Thermal Plasma), 예열플러그(Glow Plug) 등과 같이 일반적으로 상술한 바와 같은 목적으로 사용되는 어떤 장치를 사용하여도 무방하다.The temperature raising device 440 is a device for allowing combustion to occur even at a low temperature, and generally includes an electric heated catalyst (EHC), a thermal cracking catalyst, a thermal plasma plasma, a glow plug, and the like. Any device used for the above-described purposes may be used.

상기 순환로들(411, 421)은 연료탱크(200)와 직접 연결되어 있거나(도 3) 또는 순차적으로 연결되어 있다(도 2). 따라서 엔진(100)의 열로부터 받는 영향이 최소화된 디젤 연료를 그 내부에 유통시킬 수 있다. 상기 순환로들(411, 421)은 도시된 바와 같이 주분사장치(421) 및 보조분사장치(422)를 둘러싸도록 되어 있다. 따라서 상기 순환로들(411, 421)을 따라 유통되는 디젤 연료에 의해 상기 주분사장치(421) 및 보조분사장치(422)로부터 열을 빼앗아 냉각시키게 되는 효과가 발생된다.The circulation paths 411 and 421 are directly connected to the fuel tank 200 (FIG. 3) or sequentially connected (FIG. 2). Therefore, the diesel fuel having a minimal influence from the heat of the engine 100 can be distributed therein. The circulation paths 411 and 421 are configured to surround the main injection device 421 and the auxiliary injection device 422 as shown. Therefore, an effect of taking heat away from the main injection device 421 and the auxiliary injection device 422 and cooling the diesel fuel circulated along the circulation paths 411 and 421 is generated.

본 발명은 상기한 실시예에 한정되지 아니하며, 적용범위가 다양함은 물론이고, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 본 발명이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능한 것은 물론이다.The present invention is not limited to the above-described embodiments, and the scope of application of the present invention is not limited to those of ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Of course, various modifications can be made.

이상에서와 같이 본 발명에 의하면, 인젝터에 부가적인 냉각장치를 더 구비할 필요가 없이 디젤 연료의 흐름을 이용하여 인젝터를 냉각하게 함으로써 장비의 개선에 있어서 발생하는 부가적인 비용이나 공간의 부족 등과 같은 문제가 전혀 없이 인젝터를 효과적으로 냉각할 수 있게 되는 효과가 있다. 물론 이에 따라 인젝터의 열화에 의한 성능 저감의 영향이 최소화되며 특히 인젝터가 과열될 시 노즐 부 위에 탄소퇴적물이 부착됨으로써 노즐의 분사 효율이 저감되게 되는 문제점을 원천적으로 제거할 수 있게 되는 효과가 있다. 뿐만 아니라 본 발명에 의하면 주분사장치와 보조분사장치를 사용하여 단계적으로 온도를 상승시키도록 함으로써 보다 정밀하게 디젤 연료의 분사량을 조절할 수 있는 효과가 있다. 물론 본 발명은 이에 따라 동일 온도까지 가스의 온도를 상승시키기 위하여 필요한 디젤 연료의 분사 필요량을 절약할 수 있게 되는 효과가 있으며, 더불어 전체적인 차량의 연비를 개선할 수 있게 되는 커다란 효과가 있다.As described above, according to the present invention, it is not necessary to further include an additional cooling device in the injector, so that the injector is cooled by using the flow of diesel fuel. There is an effect that can effectively cool the injector without any problem. Of course, the effect of performance reduction due to deterioration of the injector is minimized, and in particular, when the injector is overheated, carbon deposits are attached to the nozzle unit, thereby effectively eliminating the problem that the injection efficiency of the nozzle is reduced. In addition, according to the present invention, it is possible to more precisely control the injection amount of diesel fuel by increasing the temperature step by step using the main injection device and the auxiliary injection device. Of course, the present invention has the effect of saving the required amount of injection of diesel fuel required to increase the temperature of the gas to the same temperature, and also has a great effect to improve the overall fuel economy of the vehicle.

Claims (3)

엔진(100); 상기 엔진(100)과 연결되어 디젤 연료를 공급하는 연료탱크(200); 상기 엔진(100)의 배기구(110)와 배기라인(130)으로 연결되어 상기 엔진(100)으로부터 배출되는 가스의 매연 및 공해물질을 정화하여 외부로 배출하는 매연저감장치(300); 상기 연료탱크(200)와 연결되며 주입관(521), 주입펌프(510), 인젝터(400) 및 순환관(522)을 순차적으로 포함하여 이루어져 상기 매연저감장치(300) 전단의 배기라인(130) 상에 구비되는 주입수단; 및 상기 매연저감장치(300)의 포화 상태를 감지하여 판단하고 상기 인젝터(400)의 작동을 제어하는 제어부(500);를 포함하여 이루어지는 배기정화시스템에 채용되는 인젝터(400)에 있어서,Engine 100; A fuel tank 200 connected to the engine 100 to supply diesel fuel; A smoke reduction device (300) connected to an exhaust port (110) of the engine (100) and an exhaust line (130) to purify the soot and pollutants of the gas discharged from the engine (100) and discharge it to the outside; The exhaust line 130 is connected to the fuel tank 200 and includes an injection pipe 521, an injection pump 510, an injector 400, and a circulation pipe 522, in sequence, in front of the smoke reduction device 300. Injection means provided on the; In the injector 400 employed in the exhaust purification system comprising a; and a control unit 500 for detecting and determining the saturation state of the smoke reduction device 300 and controls the operation of the injector 400, 상기 인젝터(400)는 상기 배기라인(130)에 연결되는 몸체(410), 상기 몸체(410)에 구비되는 보조분사장치(422), 상기 보조분사장치(422)의 하류에 구비되는 승온장치(440) 및 상기 승온장치(440)의 하류에 구비되는 주분사장치(421)을 포함하여 이루어져, 상기 보조분사장치(422) - 상기 승온장치(440) - 상기 주분사장치(421) 순으로 순차적으로 공기를 유통시켜 단계적으로 승온하는 것을 특징으로 하는 배기정화장치용 인젝터.The injector 400 may include a body 410 connected to the exhaust line 130, an auxiliary injection device 422 provided at the body 410, and a temperature increasing device provided downstream of the auxiliary injection device 422 ( 440 and a main injection device 421 provided downstream of the temperature raising device 440, in order from the auxiliary injection device 422 to the temperature raising device 440 to the main injection device 421. Injector for exhaust purification apparatus characterized in that the air is circulated by step by step to increase the temperature. 제 1항에 있어서, 상기 인젝터(400)는The method of claim 1, wherein the injector 400 함체 형태로 형성되어 상기 배기라인(130)에 연결되는 몸체(410),Body 410 is formed in the form of a body connected to the exhaust line 130, 상기 몸체(410)의 일측에 구비되는 보조분사장치(422), 상기 보조분사장치(422)를 냉각하도록 상기 주입관(521)과 연결되어 상기 보조분사장치(422)의 둘레에 형성되어 디젤 연료를 유통시키는 보조분사순환로(412), 상기 주입관(521)과 연결되어 상기 보조분사장치(422)로 분사되는 디젤 연료를 공급하는 보조분사공급관(432),It is connected to the injection pipe 521 to cool the auxiliary injection device 422, the auxiliary injection device 422 provided on one side of the body 410 is formed around the auxiliary injection device 422 diesel fuel Auxiliary injection circulation path 412 for circulating the auxiliary injection supply pipe 432 is connected to the injection pipe 521 and supplies the diesel fuel injected into the auxiliary injection device 422, 상기 몸체(410) 내부 및 상기 보조분사장치(422)의 하류 측에 구비되는 승온장치(440),A temperature raising device 440 provided inside the body 410 and downstream of the auxiliary injection device 422, 상기 몸체(410)의 일측 및 상기 승온장치(440)의 하류 측에 구비되는 주분사장치(421), 상기 주분사장치(421)를 냉각하도록 상기 주입관(521)과 연결되어 상기 주분사장치(421)의 둘레에 형성되어 디젤 연료를 유통시키는 주분사순환로(411), 상기 주입관(521)과 연결되어 상기 주분사장치(421)로 분사되는 디젤 연료를 공급하는 주분사공급관(431)The main injection device is connected to the injection pipe 521 to cool the main injection device 421 and the main injection device 421 provided on one side of the body 410 and the downstream side of the temperature raising device 440. A main injection circulation path 411 formed around the 421 to circulate diesel fuel, and a main injection supply pipe 431 connected to the injection pipe 521 to supply diesel fuel injected into the main injection device 421. 을 포함하여 이루어지는 것을 특징으로 하는 배기정화장치용 인젝터.Injector for exhaust purification apparatus comprising a. 제 1항 또는 제 2항에 있어서, 상기 승온장치(440)는The method of claim 1 or 2, wherein the temperature raising device 440 EHC(Electric Heated Catalyst), 개질촉매(Thermal Cracking), 열분해 플라즈마(Thermal Plasma), 예열플러그(Glow Plug) 중에서 선택되는 어느 하나 이상이 배치되는 장치인 것을 특징으로 하는 배기정화장치용 인젝터.An injector for exhaust purification apparatus, characterized in that any one or more selected from EHC (Electric Heated Catalyst), Thermal Cracking, Thermal Plasma, and Glow Plug are disposed.
KR1020070048499A 2007-05-18 2007-05-18 An injector for regeneration of an exhaust gas purifying device KR20080102106A (en)

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PCT/KR2008/002540 WO2008143412A1 (en) 2007-05-18 2008-05-06 An injector for regeneration of an exhaust gas purifying device
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