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이경복(Kyungbok Lee),김영욱(Yongwok Kim),한민홍(Minhong Han) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
A traffic accident being happened on the road is mostly caused by rear-end collisions. In particular, the proportion of the big accident is high on the express highway. An information delivery system between cars is suggested as a method for decreasing the proportion of such big accident on the express highway. A traffic accident can be remarkably reduced if a rear car can notice the danger information of a front car in advance. If a GPS receiver and RF module are established in all the cars and the position coordinate and danger information received from the GPS receiver are sent to all the rear cars within the communication area, each of the rear cars can notice the opponent position, headway direction, and danger information by using the position coordinate and danger information received from the front car. Finally all the car drivers within the RF communication area can perceive the front danger information in advance. Accordingly, the present system delivers the front danger information to the rear car by means of a system between cars with low expense so that it can be easily employed as a device for safe driving on the express highway.
이경복(Kyungbok Lee),독고지은(JiEuin Dokko),유지연(Jiyeon Yoo),이숙연(Sook-Yeon Lee),임종인(Jong-in Lim) 한국정보보호학회 2009 情報保護學會誌 Vol.19 No.4
최근 그린 에너지에 대한 관심이 고조되면서, 기존 전력망에 IT 기술이 융합함으로써 보다 지능적으로 전력을 송ㆍ배전하고, 에너지를 효율적으로 사용하게 하는 스마트 그리드(지능형 전력망)에 대한 사업 추진이 급속하게 진행되고 있다. 하지만 스마트 그리드는 그 대상이 전력망이라는 주요기반시설의 특성으로 인하여 보안의 고려가 표면적으로 드러나고 있지 못한 상황이다. 이에 스마트 그리드 활성화의 동인으로써 스마트 그리드의 보안에 대한 연구가 지속적으로 진행되도록 하기 위해서, 본 연구에서는 스마트 그리드에서 보안 이슈 가운데 소비자 참여에 한정하여 그 세부 이슈와 더불어 대응방안을 고찰하도록 한다.
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.
DPF의 Crack 상태에 따른 PM 배출 특성에 관한 실험적 연구
김종훈(Jonghun Kim),오광철(Kwangchul Oh),이경복(Kyungbok Lee),김덕진(Deokjin Kim),이천환(Chunhwan Lee),이춘범(Chunbeom Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Several problems with exhaust gas emitted by diesel engine must be solved. Especially particulate matter (PM) is the major concerns. To reduce emission of diesel soot, diesel particulate filter (DPF) has become widely known as an indispensable after-treatment component of the purification of the PM in the diesel exhaust gas. DPF is damaging by various forms such as whitening and crack due to controlled or uncontrolled regeneration and uncertain reasons, and there is no clear criterion to judge the cracked filter. So, we hope to classify the degree of filter crack using the particle emission characteristics. Filtration efficiency of PN for cracked filter is varying from time to time, it is showing a big differences by the test number. But, some failure shows no difference of PM filtration efficiency with fresh filter. In this study, we hope to find two objectives. First, it is find the reduction efficiency of PM mass & number for fresh and cracked filters. Second, we standardize the crack level of filter.