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EURO-Ⅳ대응 상용디젤엔진의 SCR 시스템 적용에 따른 나노입자 배출 특성(Ⅱ)
이천환(Chunhwan Lee),오광철(Kwangchul Oh),김덕진(Deokjin Kim),이종인(Jongin Lee),전성용(Sungyong Jeon),이춘범(Chunbeom Lee),이동인(Dongin Lee),김상호(Sangho Kim),한현식(Hyunsik Han),배재호(Jaeho Bae),김은석(Eunseok Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It is well known that two representative methods satisfy the condition of EURO-Ⅳ regulation from EURO-Ⅲ. The first method is the reduction of NOx in an engine operation by utilizing EGR and the elimination of increased PM by DPF. However, it results in bad fuel efficiency. The second is the strategy to reduce PM and emit the high NOx concentration. In other words, the concentration of PM produced by high efficiency combustion sufficiently meets the requirement of regulation, and NOx generated in this process can be removed by SCR system. While it has a good fuel efficiency relative to the first method mentioned above, its social infrastructure is demanded. In this paper, the number distribution of nano PM has been evaluated analyzed by Electrical Low Pressure Impactor(ELPI) in case of Urea-SCR system applied. From the results, The particle number was increased slightly in proportion to the amount of urea injection on Fine Particle Region, whether AOC is used or not.
EURO-Ⅳ대응 상용디젤엔진의 SCR 시스템 적용에 따른 나노입자 배출 특성
이천환(Chunhwan Lee),오광철(Kwangchul Oh),김덕진(Deokjin Kim),이종인(Jongin Lee),전성용(Sungyong Jeon),이춘범(Chunbeom Lee),이동인(Dongin Lee),김상호(Sangho Kim),한현식(Hyunsik Han),배재호(Jaeho Bae),김은석(Eunseok Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
It is well known that two representative methods satisfy the condition of EURO-Ⅳ regulation from EURO-Ⅲ. The first method is the reduction of NOx in an engine operation by utilizing EGR and the elimination of increased PM by DPF. However, it results in bad fuel efficiency. The second is the strategy to reduce PM and emit the high NOx concentration. In other words, the concentration of PM produced by high efficiency combustion sufficiently meets the requirement of regulation, and NOx generated in this process can be removed by SCR system. While it has a good fuel efficiency relative to the first method mentioned above, its social infrastructure is demanded. In this paper, the number distribution of nano PM has been evaluated analyzed by Electrical Low Pressure Impactor(ELPI) in two different case of engine condition, EURO-Ⅲ base engine with DPF system and EURO-Ⅳ level engine(modified from EURO-Ⅲ) with SCR system. From the result of this study, the number distribution of nano PM in a modified EURO-Ⅳ engine was similar level compared to the result of EURO-Ⅲ engine installed DPF system. In case of EURO-Ⅳ engine with SCR system, the particle number was increased slightly in proportion to the amount of urea injection on big size particles, whether AOC is used or not.
이천환(Chunhwan Lee),이광철(Kwangchul Oh),김덕진(Deokjin Kim),하태권(Taewon Ha),이경복(Kyungbok Lee),이춘범(Chunbeom Lee) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_1
As it is known that the small size particles emitted from diesel engine are more harmful to human body, the concern about the emission of ultra-fine particles is growing. Then the total-Dumber-emission characteristics of nano PM that will be added to emerging regulation in the future are important targets of new coming technology to develope Diesel Particulate Filter (DPF) system. In this paper, the nano PM emission characteristics in according with DPF porosity were evaluated and analyzed by Electric Low Pressure Impactor (ELPI) and Condensation Particle Counter (CPC). The total number of nano PM had been measured in different two case of DPF status ,those are, a PM loading case in filter and a cleaning case after regeneration. From the results of this study, the large difference of filtration efficiency of two cases was shown at low exhaust gas temperature(<400℃). And the more number of nano particles were emitted from 50% porosity DPF than 40% porosity DPF. But all of other experimental results including PM weight and engine performance were not different except the total number emission characteristic of nano PM.
EURO-Ⅳ 대응 배기정화 시스템 설계 및 최적화 기술 개발
이천환(Chunhwan Lee),이춘범(Chunbeom Lee),김성중(Sungjoong kim),서동규(Dongkyu Seo),유영면(Yungmyun Yoo),이동인(Dongin Lee),한현식(Hyunsik Han) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Limited petroleum fuel and green house effect are increasing the necessity of CO₂ reduction policy of every country and high fuel efficiency automobile. The one way in the present is diesel fueled vehicle is applied to satisfy these requests. In case of diesel vehicles, there is a synergy more than 20% fuel efficiency compared with gasoline vehicles but particle material and nitrogen oxide emissions are remained to overcome.<br/> In this paper, diesel after-treatment and cooled EGR systems are evaluated and tested s that optimal technologies are developed for simultaneous PM/NOx reduction to meet the EURO-Ⅳ regulation. For the DePM, three different size hybrid DPF (DOC+catalyzed DPF) systems are used and for the DeNOx, cooled EGR (CEGR) system is used. At the results of evaluation and test on 3.3L EURO-Ⅱ diesel engine, the HDPF systems had 85-90% PM reduction rate ad CEGR systems are achieved to 30%-60% NOx reduction rate. <br/> From the results, if these technologies are applied to EURO-Ⅲ engine, the emission level will be estimated enough to satisfy the EURO- Ⅳ regulation.
[구조강도부문] 자동차용 공기청정기의 시험방법에 따른 신뢰성 평가
이천환(Chunhwan Lee),김병수(Byungsoo Kim),심상곤(Sangkon Shim),안순철(Sooncheol Ahn),조택동(Taikdong Cho) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Reliability and repeatability are confirmed by experiment between another type equipment for automobile air cleaner performance test. Because there are three different types of test equipment in terms of air flow control and compensation to standard condition. The test equipment should be operated accurately and airflow rate is controlled within +/-2% error at set point in accordance with test regulation. But most of test equipment are not that. So this paper introduce the experimental test results are carried out by conventional manual airflow rate control system and automatic control device.