KR20100064931A - Exhaust gas recirculation system - Google Patents

Exhaust gas recirculation system Download PDF

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KR20100064931A
KR20100064931A KR1020080123583A KR20080123583A KR20100064931A KR 20100064931 A KR20100064931 A KR 20100064931A KR 1020080123583 A KR1020080123583 A KR 1020080123583A KR 20080123583 A KR20080123583 A KR 20080123583A KR 20100064931 A KR20100064931 A KR 20100064931A
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line
low pressure
exhaust gas
exhaust
intake
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KR1020080123583A
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Korean (ko)
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KR100999646B1 (en
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최지훈
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현대자동차주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/24—Layout, e.g. schematics with two or more coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/34—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with compressors, turbines or the like in the recirculation passage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/38—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with two or more EGR valves disposed in parallel
    • 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
    • Y02T10/12—Improving ICE efficiencies

Abstract

PURPOSE: An exhaust gas recirculation system is provided to easily remove HC/CO included in exhaust gas using catalyst components of a HC/CO purification device arranged at the inlet of a low-pressure EGR(Exhaust Gas Recirculation) line. CONSTITUTION: An exhaust gas recirculation system comprises an intake line(105), an exhaust line(110), a low pressure EGR line(115), a purification device(140), an EGR cooler(145), an EGR filter(150), and an EGR valve(155). The low pressure EGR line recirculates exhaust gas passing through the exhaust line to the intake line. The purification device purifies HC/CO of harmful gas included in exhaust gas recirculated to the intake line. The EGR cooler and the EGR filter are installed in the low pressure EGR line. The EGR valve is installed in the low pressure EGR line and controls the flow of recirculated exhaust gas. A pump(160b) of a turbocharger(160) is installed in the downstream side of the intake line at the position where the intake line and the low pressure EGR line meet. A turbine(160a) of the turbocharger is installed in the upstream side of the exhaust line at the position where the exhaust line and the low pressure EGR line are branched.

Description

배기가스 재순환 시스템{EXHAUST GAS RECIRCULATION SYSTEM}Exhaust gas recirculation system {EXHAUST GAS RECIRCULATION SYSTEM}

본 발명은 배기가스 재순환 시스템에 관한 것으로서, 보다 상세하게는 배기 라인에서 흡기 라인으로 배기가스를 재순환시키는 배기가스 재순환 시스템에 관한 것이다.The present invention relates to an exhaust gas recirculation system, and more particularly, to an exhaust gas recirculation system for recycling exhaust gas from an exhaust line to an intake line.

트럭이나 대형 차량에 탑재되는 대부분의 디젤엔진(diesel engine)에는 배기가스 규제에 대응하기 위해 배기가스 재순환 시스템이 설치된다.Most diesel engines in trucks and heavy vehicles are equipped with an exhaust gas recirculation system in order to respond to emissions regulations.

배기가스 재순환 시스템은 엔진에서 배출되는 배기가스의 일부를 실린더의 흡기 장치로 되돌림으로써 엔진의 연소 온도를 내리고, NOx의 발생량을 저감시킨다.The exhaust gas recirculation system lowers the combustion temperature of the engine and reduces the amount of NOx generated by returning a part of the exhaust gas discharged from the engine to the intake device of the cylinder.

유럽과 북미의 배출가스 규제가 더욱 강화됨에 따라 질소산화물(NOx)의 제거가 더욱 중요해지고 있고, 재순환가스(이지알 가스)의 온도와 유량을 효율적으로 제어하기 위하여 고압 이지알시스템(HP EGR system)과 더불어 저압 이지알시스템(LP EGR system)이 사용되고 있다.As the emission regulations in Europe and North America are tightened, the removal of nitrogen oxides (NOx) is becoming more important, and the HP EGR system (HP EGR system) is used to efficiently control the temperature and flow rate of the recycled gas. In addition, the low pressure LP EGR system is used.

한편, 이지알시스템과 더불어 터보차저, 인터 쿨러, 및 이지알 밸브 등을 보호하기 위하여 이지알라인에는 입자상 물질을 걸러내기 위한 이지알필터가 적용되 고 있다.On the other hand, in order to protect the turbocharger, inter cooler, easy valve, etc., in addition to the easy R system, an easy filter is used to filter particulate matter.

그러나, 배기가스 후처리장치를 재생할 때 발생되는 HC/CO가 이지알시스템에 유입되는 경우, 관련된 중요 부품들의 작동에 부작용을 초래할 수 있다.However, when HC / CO generated when regenerating the exhaust gas aftertreatment enters the EZR system, it may cause side effects on the operation of the important components involved.

HC의 일부는 상대적으로 저온의 표면에 부착되는 성질을 가지고 있어서 쿨러와 밸브 류의 성능을 저하시킬 뿐만 아니라 공기중의 산소와 반응하여 터보차저의 컴퓨레서에 열화/열충격을 주어 구조적인 손상을 유발할 수 있다.Some of the HC has a relatively low temperature on the surface, which not only degrades the performance of the cooler and the valves, but also reacts with oxygen in the air to deteriorate / heat shock the compressor of the turbocharger, causing structural damage. Can be.

따라서, 본 발명은 상기한 바와 같은 문제점을 해결하기 위하여 창출된 것으로, 본 발명의 목적은 이지알시스템으로 유입되는 HC/CO를 저감시켜 관련된 부품들의 손상을 미연에 방지하고 안정적으로 작동되도록 하는 배기가스 재순환 시스템을 제공하는 것이다.Therefore, the present invention was created to solve the problems as described above, an object of the present invention is to reduce the HC / CO flowing into the RIG system to prevent the damage of the related components in advance and to ensure stable operation It is to provide a gas recirculation system.

이러한 목적을 달성하기 위한 본 발명에 따른 배기가스 재순환 시스템은, 엔진 내부에 형성된 실린더 내로 연소용 공기가 통과하는 흡기 라인, 상기 실린더에서 발생된 배기가스가 통과하는 배기 라인, 상기 배기 라인을 통과하는 배기가스를 상기 흡기 라인으로 재순환시키는 저압 이지알 라인, 상기 저압 이지알 라인에 설치되어 상기 흡기 라인으로 재순환되는 배기가스에 포함된 유해배기가스 중 HC/CO를 정화하는 정화장치, 상기 저압 이지알 라인에 설치되어 냉각 기능을 수행하는 이지알쿨러, 상기 저압 이지알 라인에 설치되어 일물질을 필터링하는 이지알필터, 및 상기 저압 이지알 라인에 설치되어 재순환 배기가스 흐름을 제어하는 이지알 밸브; 를 포함하고, 상기 흡기 라인과 상기 저압 이지알 라인이 합류하는 지점에서 상기 흡기 라인의 하류측으로 터보차저의 펌프가 장착되고, 상기 배기 라인과 상기 저압 이지알 라인이 분기되는 지점에서 상기 배기 라인의 상류측으로 상기 터보차저의 터빈이 장착된다.Exhaust gas recirculation system according to the present invention for achieving this object, an intake line through which the combustion air passes into the cylinder formed inside the engine, an exhaust line through which the exhaust gas generated in the cylinder passes, passing through the exhaust line A low pressure easy line for recirculating the exhaust gas to the intake line, a purification device for purifying HC / CO of the harmful exhaust gas contained in the exhaust gas recycled to the intake line is installed in the low pressure easy line, the low pressure easy An EG cooler installed in a line to perform a cooling function, an IG filter installed in the low pressure IGAL line to filter a single substance, and an IG valve installed in the low pressure EZR line to control a recirculated exhaust gas flow; And a pump of a turbocharger is installed downstream of the intake line at a point where the intake line and the low pressure easy line merge, and at the point where the exhaust line and the low pressure easy line are branched. The turbine of the turbocharger is mounted upstream.

상기 저압 이지알 라인이 분기되는 분기점과 상기 터빈 사이 상기 배기 라인에 디젤필터촉매(DPF: diesel particulate filter)가 배치되고, 상기 분기점 하류측에 NOx 정화장치가 배치되는 것을 특징으로 한다.A diesel particulate filter (DPF) is disposed at the exhaust line between the branch point where the low pressure EZR line branches and the turbine, and a NOx purifier is disposed downstream of the branch point.

상기 터보차저의 상기 터빈 상류측 상기 배기 라인에서 분기되어 스로틀밸브의 하류측 상기 흡기 라인으로 합류되는 고압 이지알 라인을 더 포함한다.And a high-pressure zigzag line branched from the turbine upstream side of the turbocharger and joined to the intake line downstream of the throttle valve.

상기 저압 이지알 라인은 상기 터보장치의 상기 펌프의 상류측 상기 흡기라인으로 합류되는 것을 특징으로 한다.The low pressure easy line is joined to the intake line upstream of the pump of the turbomachine.

상술한 바와 같이 본 발명에 따른 배기가스 재순환 시스템에 의하면, 이지알시스템으로 HC/CO의 유입이 저감되어 이지알시스템의 열화, 터보차저의 콤퓨레서 손상, 및 엔진제어불안정 등을 개선할 수 있다.As described above, according to the exhaust gas recirculation system according to the present invention, the inflow of HC / CO into the EG system can be reduced to improve the degradation of the EG system, damage to the compressor of the turbocharger, and unstable engine control. have.

아울러, 재순환되는 배기가스에 포함된 HC의 저감으로 이지알시스템과 관련된 각종 부품의 내구성을 향상시켜 상품성을 높일 수 있다.In addition, by reducing the HC contained in the exhaust gas being recycled, it is possible to improve the durability of various components related to the EZR system and to increase the merchandise.

이하, 본 발명의 바람직한 실시예를 첨부한 도면에 의거하여 상세하게 설명 하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 실시예에 따른 차량의 배기 시스템을 개략적으로 도시한 구성도이다.1 is a configuration diagram schematically showing an exhaust system of a vehicle according to an embodiment of the present invention.

도 1을 참조하면, 배기 시스템은, 엔진(100), 흡기 라인(105), 배기 라인(110), 저압 이지알 라인(115), 고압 이지알 라인(117), 인터 쿨러(120), 스로틀 밸브(125), DPF(130), NOx 정화장치(135), HC/CO 정화장치(140), 저압 이지알 쿨러(145), 필터(150), 저압 이지알 밸브(155), 터보차저(160), 터빈(160a)과 펌프(160b)를 포함하는 터보차저(160), 고압 이지알 밸브(165), 및 고압 이지알 쿨러(170)를 포함한다.Referring to FIG. 1, the exhaust system includes an engine 100, an intake line 105, an exhaust line 110, a low pressure easy line 115, a high pressure easy line 117, an inter cooler 120, and a throttle. Valve 125, DPF 130, NOx purifier 135, HC / CO purifier 140, low pressure EZ cooler 145, filter 150, low pressure IG valve 155, turbocharger ( 160, a turbocharger 160 including a turbine 160a and a pump 160b, a high pressure EZ valve 165, and a high pressure EZ cooler 170.

외부공기가 엔진으로 유입되는 상기 흡기 라인(105)에는 상기 인터 쿨러(120)와 상기 스로틀 밸브(125)가 순차적으로 배치되고, 상기 배기 라인에는 상기 DPF와 상기 NOx 정화장치가 순차적으로 배치된다.The inter cooler 120 and the throttle valve 125 are sequentially disposed in the intake line 105 through which external air flows into the engine, and the DPF and the NOx purifier are sequentially disposed in the exhaust line.

그리고, 상기 DPF(130)의 상류측에는 상기 터보차저(160)의 상기 터빈(160a)이 장착되고, 상기 인터 쿨러(120)의 하류측에는 상기 터빈(160a)에 의해서 작동되는 상기 펌프(160b)가 장착된다.In addition, the turbine 160a of the turbocharger 160 is mounted upstream of the DPF 130, and the pump 160b operated by the turbine 160a is downstream of the intercooler 120. Is mounted.

저압의 배기가스가 재순환되는 상기 저압 이지알 라인(115)은 상기 DPF(130)와 상기 NOx 정화장치(135) 사이 상기 배기 라인(110)에서 분기되어 상기 펌프(160b)의 하류측 상기 흡기 라인(105)으로 합류된다.The low pressure EG line 115 through which low pressure exhaust gas is recycled is branched from the exhaust line 110 between the DPF 130 and the NOx purifier 135 so as to be downstream of the pump 160b. Joined 105.

상기 저압 이지알 라인(115)에는 상기 HC/CO 정화장치(140), 상기 저압 이지알 쿨러(145), 상기 필터(150), 및 상기 저압 이지알 밸브(155)가 순차적으로 배치 된다. 배치순서는 실시예에 따라서 변경될 수 있음은 당연하다.The HC / CO purifier 140, the low pressure EZ cooler 145, the filter 150, and the low pressure EZ valve 155 are sequentially disposed in the low pressure EZR line 115. Naturally, the arrangement order may be changed according to the embodiment.

고압의 배기가스가 재순환되는 상기 고압 이지알 라인(117)은 상기 터보차저(160)의 상기 터빈(160a)의 상류측 상기 배기 라인(110)에서 분기되어 상기 스로틀 밸브(125)의 하류측 상기 흡기 라인(105)으로 합류된다. The high pressure EG line 117 to which the high pressure exhaust gas is recirculated is branched from the exhaust line 110 upstream of the turbine 160a of the turbocharger 160 to the downstream side of the throttle valve 125. Joined to intake line 105.

그리고, 상기 고압 이지알 라인(117)에는 상기 고압 이지알 쿨러(170)와 상기 고압 이지알 밸브(165)가 순차적으로 배치된다.In addition, the high pressure EG cooler 170 and the high pressure EG valve 165 are sequentially disposed in the high pressure EG line 117.

상기 배기 라인(110)을 통해서 흐르는 배기가스의 일부는 상기 저압 이지알 라인(115)을 통해서 상기 흡기 라인(105)으로 재순환되는데, 이 재순환되는 배기가스는 상기 저압 이지알 쿨러(145), 상기 필터(150), 상기 저압 이지알 밸브(155), 상기 펌프(160b), 상기 인터 쿨러(120), 및 상기 스로틀 밸브(125)를 거쳐 상기 엔진(100)으로 유입된다.A portion of the exhaust gas flowing through the exhaust line 110 is recycled to the intake line 105 through the low pressure EZR line 115, and the recycled exhaust gas is the low pressure EZR cooler 145, The filter 150 is introduced into the engine 100 through the low pressure easy valve 155, the pump 160b, the inter cooler 120, and the throttle valve 125.

특히, 상기 DPF(130)를 재생시키기 위해서 연료가 더 분사되는 경우 재순환되는 배기가스에는 HC/CO가 다량 함유되어 있으며, 이러한 HC/CO의 일부는 상기 저압 이지알 라인(115)과 상기 흡기 라인(105)에 배치된 각종 부품표면에 부착되거나 산소와 연소 반응하여 부품에 열 충격을 줄 수 있다.In particular, when the fuel is further injected to regenerate the DPF 130, the recycled exhaust gas contains a large amount of HC / CO, and part of the HC / CO is the low-pressure EZR line 115 and the intake line. It may adhere to various component surfaces disposed at 105 or burn reaction with oxygen to cause thermal shock to the components.

본 발명의 실시예에서는, 도 1에 도시한 바와 같이, 상기 저압 이지알 라인(115)의 입구측에 상기 HC/CO 정화장치(140)가 배치되고, 상기 HC/CO 정화장치(140)는 재순환되는 배기가스에 포함된 HC/CO를 촉매성분을 이용하여 제거하게 된다.In the embodiment of the present invention, as shown in Figure 1, the HC / CO purifier 140 is disposed on the inlet side of the low-pressure EZR line 115, the HC / CO purifier 140 is HC / CO contained in the recycled exhaust gas is removed using a catalyst component.

상기 저압 이지알 라인(115)과 상기 흡기 라인(105)에 설치된 각종 부품들을 보호하기 위해서 상기 필터(150)가 장착되지만, 상기 필터(150)는 메쉬 타입으로써 입자크기가 큰 입자상 물질을 포집하지만, 재순환되는 배기가스에 포함된 HC/CO를 제거하지 못하는 단점을 가지고 있다. 도 1에 도시한 바와 같이, 상기 고압 이지알 라인(117)에는 별도의 정화장치가 배치되지 않으나, 실시예에 따라서 배기가스 정화장치가 추가로 장착될 수 있음은 당연하다.Although the filter 150 is mounted to protect the various components installed in the low pressure zigzag line 115 and the intake line 105, the filter 150 is a mesh type and collects a particulate material having a large particle size. However, there is a disadvantage in that HC / CO contained in the exhaust gas that is recycled cannot be removed. As shown in FIG. 1, a separate purifier is not disposed in the high pressure EG line 117, but it is natural that an exhaust gas purifier may be additionally installed according to an embodiment.

그러나, 상기 고압 이지알 라인(117)을 지나는 배기가스는 상기 흡기 라인(105)에 구비된 상기 펌프(160b), 상기 인터 쿨러(120), 및 상기 스로틀 밸브(125)를 지나지 않기 때문에 기능과 비용측면에서 유리하지 않다고 판단된다.However, since the exhaust gas passing through the high pressure EZR line 117 does not pass through the pump 160b, the inter cooler 120, and the throttle valve 125 provided in the intake line 105. We believe it is not advantageous in terms of cost.

본 발명의 실시예에 따른 상기 DPF(130)는 Diesel Particulate Filter의 약자로써, 디젤촉매필터라고도 불리우며 배기가스에 포함된 입자상 물질을 포집하고, 설정된 온도에서 포집된 입자상 물질을 내부에 함유된 촉매를 이용하여 제거하는 기능을 수행한다. The DPF 130 according to an embodiment of the present invention is an abbreviation of Diesel Particulate Filter, which is also called a diesel catalyst filter, collects particulate matter contained in exhaust gas, and collects a catalyst containing particulate matter collected therein at a set temperature. It performs the function to remove.

상기 DPF(130)의 구조와 화학적인 기능은 공지된 기술이므로 상세한 설명은 생략한다. 아울러, 상기 HC/CO 정화장치(140)와 상기 NOx 정화장치(135)에 대한 구조와 기능도 공지된 기술이므로 상세한 설명은 생략한다. Since the structure and chemical function of the DPF 130 is a known technique, detailed description thereof will be omitted. In addition, since the structure and function of the HC / CO purifier 140 and the NOx purifier 135 are also known techniques, detailed descriptions thereof will be omitted.

이지알시스템과 엔진으로 HC/CO의 유입이 저감되어 이지알시스템의 열화, 터보차저의 콤퓨레서 손상, 및 엔진제어불안정 등을 개선할 수 있다. 아울러, 이지알시스템과 관련된 각종 부품의 내구성을 향상시켜 차량의 내구성과 상품성을 높일 수 있다.The inflow of HC / CO into the EZR system and engine can be reduced to improve the IGRS system degradation, turbocharger compressor damage, and engine control instability. In addition, it is possible to improve the durability of the various parts related to the EZR system to increase the durability and marketability of the vehicle.

본 발명의 실시예에서, 상기 NOx 정화장치(135)는, LNT, NSR, UREA-SCR, 및 HC-SCR을 포함하여 다른 종류로 적용될 수 있음은 당연하다. In the embodiment of the present invention, it is obvious that the NOx purifier 135 may be applied to other types including LNT, NSR, UREA-SCR, and HC-SCR.

그리고, UREA 또는 HC 분사를 위한 분사모듈, 후 분사를 위한 포스트인젝터가 추가로 적용될 수 있다.In addition, an injection module for UREA or HC injection and a post injector for post injection may be additionally applied.

상기 HC/CO 정화장치(140)는 트랩(trap)형태에 촉매(catalyst) 성분을 함유함으로써 상기 저압 이지알 라인(115)으로 유입되는 HC/CO를 제거하여 시스템의 내구성과 엔진 제어 안정성을 확보한다.The HC / CO purifier 140 includes a catalyst component in a trap form to remove HC / CO flowing into the low pressure EZR line 115 to secure durability and engine control stability of the system. do.

이상으로 본 발명에 관한 바람직한 실시예를 설명하였으나, 본 발명은 상기 실시예에 한정되지 아니하며, 본 발명의 실시예로부터 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의한 용이하게 변경되어 균등하다고 인정되는 범위의 모든 변경을 포함한다. Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and easily changed and equalized by those skilled in the art from the embodiments of the present invention. It includes all changes to the extent deemed acceptable.

도 1은 본 발명의 실시예에 따른 차량의 배기 시스템을 개략적으로 도시한 구성도이다.1 is a configuration diagram schematically showing an exhaust system of a vehicle according to an embodiment of the present invention.

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

100: 엔진100: engine

105: 흡기 라인105: intake line

110: 배기 라인110: exhaust line

115: 저압 이지알 라인115: low pressure easy line

117: 고압 이지알 라인117: high pressure easy line

120: 인터 쿨러120: inter cooler

125: 스로틀 밸브125: throttle valve

130: DPF130: DPF

135: NOx 정화장치135: NOx purifier

140: HC/CO 정화장치140: HC / CO Purifier

145: 저압 이지알 쿨러145: low pressure easy cooler

150: 필터150: filter

155: 저압 이지알 밸브155: low pressure easy valve

160: 터보차저160: turbocharger

160a: 터빈160a: turbine

160b: 펌프160b: pump

165: 고압 이지알 밸브165: high pressure easy valve

170: 고압 이지알 쿨러170: high pressure easy cooler

Claims (4)

엔진 내부에 형성된 실린더 내로 연소용 공기가 통과하는 흡기 라인;An intake line through which combustion air passes into a cylinder formed inside the engine; 상기 실린더에서 발생된 배기가스가 통과하는 배기 라인;An exhaust line through which the exhaust gas generated in the cylinder passes; 상기 배기 라인을 통과하는 배기가스를 상기 흡기 라인으로 재순환시키는 저압 이지알 라인;A low pressure easy line for recycling exhaust gas passing through the exhaust line to the intake line; 상기 저압 이지알 라인에 설치되어 상기 흡기 라인으로 재순환되는 배기가스에 포함된 유해배기가스 중 HC/CO를 정화하는 정화장치;A purifier installed in the low pressure EZR line to purify HC / CO in the harmful exhaust gas contained in the exhaust gas recycled to the intake line; 상기 저압 이지알 라인에 설치되어 냉각 기능을 수행하는 이지알쿨러; An EZ cooler installed in the low pressure EZ line to perform a cooling function; 상기 저압 이지알 라인에 설치되어 일물질을 필터링하는 이지알필터; 및An EG filter installed in the low pressure EZ line to filter a single substance; And 상기 저압 이지알 라인에 설치되어 재순환 배기가스 흐름을 제어하는 이지알 밸브; 를 포함하고,An EG valve installed in the low pressure EZ line to control a recycle exhaust gas flow; Including, 상기 흡기 라인과 상기 저압 이지알 라인이 합류하는 지점에서 상기 흡기 라인의 하류측으로 터보차저의 펌프가 장착되고, 상기 배기 라인과 상기 저압 이지알 라인이 분기되는 지점에서 상기 배기 라인의 상류측으로 상기 터보차저의 터빈이 장착되는 배기가스 재순환 시스템.The turbocharger pump is mounted downstream of the intake line at the point where the intake line and the low pressure easy line merge, and the turbo upstream of the exhaust line at the point where the exhaust line and the low pressure easy line are branched. Exhaust gas recirculation system equipped with a turbine of the charger. 제1 항에 있어서,According to claim 1, 상기 저압 이지알 라인이 분기되는 분기점과 상기 터빈 사이 상기 배기 라인에 디젤필터촉매(DPF: diesel particulate filter)가 배치되고, 상기 분기점 하류 측에 NOx 정화장치가 배치되는 것을 특징으로 하는 배기가스 재순환 시스템.A diesel particulate filter (DPF) is disposed in the exhaust line between the branch point where the low pressure EZR line branches and the turbine, and an NOx purifier is disposed downstream of the branch point. . 제2 항에 있어서,The method of claim 2, 상기 터보차저의 상기 터빈 상류측 상기 배기 라인에서 분기되어 스로틀밸브의 하류측 상기 흡기 라인으로 합류되는 고압 이지알 라인을 더 포함하는 배기가스 재순환 시스템. And a high-pressure zigzag line branched from the exhaust line upstream of the turbocharger and joined to the intake line downstream of the throttle valve. 제1 항에 있어서,According to claim 1, 상기 저압 이지알 라인은 상기 터보차저의 상기 펌프의 상류측 상기 흡기라인으로 합류되는 것을 특징으로 하는 배기가스 재순환 시스템. And the low pressure EZR line is joined to the intake line upstream of the pump of the turbocharger.
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WO2012120347A1 (en) * 2011-03-07 2012-09-13 Johnson Matthey Public Limited Company Exhaust system having ammonia slip catalyst in egr circuit
WO2012114187A3 (en) * 2011-02-21 2012-11-01 Johnson Matthey Public Limited Company Exhaust system including nox reduction catalyst and egr circuit
CN102817747A (en) * 2011-06-07 2012-12-12 现代自动车株式会社 Low pressure egr system and control method thereof
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RU2584084C2 (en) * 2011-02-21 2016-05-20 Джонсон Мэтти Паблик Лимитед Компани EXHAUST SYSTEM CONTAINING NOx REDUCTION CATALYST AND EXHAUST GAS RECYCLING LOOP
US9464547B2 (en) 2011-02-21 2016-10-11 Johnson Matthey Public Limited Company Exhaust system including NOx reduction catalyst and EGR circuit
WO2012120347A1 (en) * 2011-03-07 2012-09-13 Johnson Matthey Public Limited Company Exhaust system having ammonia slip catalyst in egr circuit
CN103402610A (en) * 2011-03-07 2013-11-20 庄信万丰股份有限公司 Exhaust system having ammonia slip catalyst in EGR circuit
KR20140017570A (en) * 2011-03-07 2014-02-11 존슨 맛쎄이 퍼블릭 리미티드 컴파니 Exhaust system having ammonia slip catalyst in egr circuit
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CN102817747A (en) * 2011-06-07 2012-12-12 现代自动车株式会社 Low pressure egr system and control method thereof
KR20190126993A (en) * 2018-05-03 2019-11-13 현대자동차주식회사 Exhaust gas recirculation

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