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[기술논문] 휘발유 차량에서 배출가스에 미치는 올레핀의 영향
박천규(Cheonkyu Park),정충섭(Choongsub Jung),나병기(Byungki Na) 한국자동차공학회 2014 한국 자동차공학회논문집 Vol.22 No.2
Exhaust emissions were studied as a function of gasoline olefin composition in two vehicles-MPI and GDi engine equipped vehicles. Three different gasolines were tested which varied in olefin contents-12, 16 and 20 vol%. Exhaust emissions in two vehicles were affected by changes in gasoline olefin composition. Responses to changes in olefins were similar in both vehicles : reducing olefins lowered emissions of NOx and CO. Measured exhaust emissions included total hydrocarbons (THC), oxides of nitrogen (NOx), carbon monooxide(CO), carbon dioxide(CO₂), formaldehyde, benzene, toluene, xylene, 1,3-butadiene and acetylene.
강형규(Kang, Hyungkyu),송호영(Song, Hoyoung),정태원(Jung, Taewon),이정민(Lee, Joungmin),정충섭(Jung, Choongsub) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05
바이오디젤이란 식물성 기름, 동물성 지방, 폐식용유 등의 재생 가능한 자원을 촉매 존재 하에 알코올과 반응시켜 생성되는 에스테르 혼합물을 말하며 경유와 물성이 유사하므로 경유에 혼합하여 압축착화 방식인 디젤엔진에 사용할 수 있다. 그러나 바이오디젤은 경유에 비하여 탄소-탄소 간 이중결합을 가지고 있는 성분을 많이 함유하고 있기 때문에 공기에 의해 산화가 일어나기 쉽다. 일반적으로 폐놀계 향산화제인 t-buthylhydroquinone(TBHQ)를 사용하여 산화안정성을 향상시키나 국내에서 사용되는 산화방지제는 전량 수입에 의존하고 있어 제품 개발에 의한 국산화가 시급한 실정이다. 본 연구에서는 폐유지로부터 생산한 바이오디젤의 산화안정성 향상을 위하여 폐놀 및 아민계 등의 산화방지제를 합성하여 바이오디젤에 적용하였으며, 다양한 물성시험방법을 적용하여 석유 및 석유대체연료 사업법에서 규정하는 바이오디젤의 품질기준을 확인하였다. 또한 EN 14112 바이오디젤 산화안정성 시험방법으로 폐놀 및 아민계 등의 산화안정성을 확인하였다. 본 연구는 산학연 공동기술개발 1차년도 사업으로 한국화학연구원과 공동으로 수행하였으며, 산화방지제 적용평가를 통해 우수한 제품을 선정하여 2차년도에는 차량 테스트를 통해 연료 첨가제로서의 적합성을 검증할 예정이다.
디메틸에테르에 첨가된 윤활성향상제의 윤활특성에 관한 연구
박천규(Cheonkyu Park),장은정(Eunjung Jang),정충섭(Choongsub Jung),이봉희(Bonghee Lee),나병기(Byungki Na) 한국트라이볼로지학회 2013 한국윤활학회지(윤활학회지) Vol.29 No.2
Dimethyl ether (DME) has a high cetane number that is suitable for diesel fuel. DME does not contain sulfur or nitrogen , and is an oxygenated fuel so it produces no particulate matter when combusted and is environmentally friendly. DME fuel for diesel engines show excellent material properties such as a lower volumetric heating value, lower boiling point, lower lubricity, and stronger solvent effect than light oil. This study experimentally examined a lubricity improver (LI) for dimethyl ether. A diesel LI based on biodiesel and fatty acid methyl ester was tested among DME LI candidates. The long-term storage stability and physical properties of the optimum LI for DME were determined.
김기호(Kiho Kim),송호영(Hoyoung Song),정충섭(Choongsub Jung),조강래(Kangrae Cho) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Particulate Matter from decrepit diesel vehicles has been magnified as social issues. The government legislated to improve air-environment as attaching diesel particulate filter to running diesel vehicles. But the number of diesel particulate filters early taken off on diesel vehicles has increased because of cancellation of vehicle registration as disuse or export. So the government amended relevant laws to recycle many filters early taken off on vehicles and to replace expired diesel particulate filters. In this study, we intend to draw a conclusion on correlation of PM and smoke from diesel particulate filters and to offer basic datum that enable to make a decision whether recycle unattached filter, for diesel particulate filter early taken off.
대형디젤엔진용 Metal Foam Filter의 미세입자 특성
송호영(Hoyoung Song),이민호,김재권(Jaigueon Kim),정충섭(Choongsub Jung),박만호(Manho Park),이정민(Jungmin Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Fine particles have the greatest demonstrated impact on human health. Their small size allows them to get deep into the lungs and from there they can reach or trigger inflammation in the lung, blood vessels or the heart, and perhaps other organs. Recently many studies have been performed about fine particles, specially nano particle less than 100㎚ size. In this study, we have performed experimental study on SFC reduction characteristics of emission, specially PM and PN(nano particle) and confirmed whether SFC have an advantage of reduction of particulate matter. EEPS measured the sample gas directly extracted from the tailpipe and used first dilutor between tailpipe and EEPS. We found that SFC reduced PM about 49% and PN about 62% and have a high reduction performance of nano particles.
이민호(Lee, Minho),김성우(Kim, Sungwoo),김정환(Kim, Jeonghwan),김기호(Kim, Kiho),정충섭(Jung, Choongsub),노경완(Rho, Kyungwan),장광식(Jang, Kwangsik) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.11
The fuel economy estimates essentially serve two purposes : to provide consumers with a basis on which to compare the fuel economy of different vehicles, and to provide consumers with a reasonable estimate of the range of fuel economy they can expect to achieve. The current fuel economy label values utilize measured fuel economy over city driving cycles. However, this test driving mode can not be evaluated the variety factor of the real-world. These factors include differences between the way vehicles are driven on the road and over the test cycles, air conditioning use, widely varying ambient temperature and humidity, widely varying trip lengths, wind, precipitation, rough road conditions, hills, etc. The purpose of this paper is to account for three of these factors on the fuel economy : 1) on-road driving patterns (i.e. higher speeds and more aggressive driving (higher acceleration rates)), 2) air conditioning, and 3) colder temperatures. The new test methods will bring into the fuel economy estimates the test results from the five emissions tests in place today : CVS-75, HWFET, US06, SC03 and Cold CVS-75. Based on these new test methods, this paper discusses the characteristics of driving condition on Hybrid electric vehicle (HEV). And this paper assesses the fuel economy label of HEV.