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Global 바이오 연료 Trend와 혼합비율에 따른 차량에서의 영향
전경주(Kyoungju Jeon),용승열(Seungryoul Yong),이정근(Jungkeun Rhee) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
In this study we are understand for the global fuel trend and identify components of typical bio-fuels and estimate both fuel properties and impacts on vehicles. For this study, also an experimental investigation was conducted to analyze the effects of diesel fuel dilution ratio, fuel vapor characteristics and carbon deposit quantities on intake valve seat in 4 cylinder gasoline engine. In this paper, the study for other fuel properties such as the mixed fuel with methanol and DME, it was not conducted but we will studies of the fuel properties and impacts on vehicle in the future.
LPG 엔진오일 열화도 모니터링을 통한 엔진마모도 연구
전경주(Kyoungju Jeon),이정근(Jungkeun Rhee),용승열(Seungryoul Yong),박민희(Minhee Park) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
In order to cope with more stringent emission regulation and durability requirement, it is necessary to reduce engine oil consumption, to extend oil life and to enhance reliability of engine durability. The composition analysis of engine lubricants is one of the essential methods for these purposes in the automotive companies. This paper describes the analysis method and understanding for engine wear ratio trough oil sample analysis test results and the test uses two LPGi 2.0 liter engine. Also, the test items are performed which element, viscosity and soot content by TGA for oil condition monitoring.
소형 차량의 Euro-5 FCC LOT(t) 특성 해석
김영웅(Youngwoong Kim),홍종열(Jongyeol Hong),용승열(Seungryoul Yong) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
Time-resolved calculation during the cold start period FCC and BCC has been tried for the Euro 5 small vehicle equipped with 1.6 liter BCC in view of HC emission and energy. Light off time (LOt) calculation of NEDC which is slower in cold start driving was implemented. As usual tool of AU53 in this first cycle was differentiated four kinds of regions: 1) key-on and 11 sec idle, 2) short acceleration which BBC`s power is demanded and start of catalyst warm-up, 3) steady and declined speed which catalyst warmed-up, 4) re-idle which LOt of FCC is obtained. Test for temperature measurement was also handled on the two different loadings of FCC. No concrete differentiation resulted in. Calculation of FCC bed temperature can actually be headed up according to the simplified region area done previous FTP vehicle. AU53 measure applied to the Euro-5 vehicle with low speed has indicated a good correlation with measured data. Of particular importance was the suitability of current FCC specification as loading modulation is applied in calculation. Consequently by combined major variables comprising of FCC we could forecast LOt values by adjustment of major variables like A/F and RPM of vehicle, heat capacity of FCC. The result of analogous SUV vehicle resembling weight and BCC size previously implemented was employed in comparison.
KSULEV FCC 최적화를 위한 programming 시도
김영웅(Youngwoong Kim),정종현(Chonghyeon Cheong),용승열(Seungryoul Yong) 한국자동차공학회 2013 한국자동차공학회 학술대회 및 전시회 Vol.2013 No.11
A state-of-art FCC technology has been strongly requested in order to achieve the most stringent emission requirement like PZEV. Appropriate TWC system, which is applicable for the reduction of both LOT and LOt should be established for this solution. In this paper GMK’s recent advanced calculation program (AU-53), which can offer more specific calculation including durability and poisoning effect than current program(AU-85), showed a good correlation with current ULEVII system. This can be extended to apply to PZEV especially predicting in LOt behavior during warm up condition. In this improved program cold start region can be also divided into three areas which have own characteristics regarding temperature profiles set by each RPM, A/F and even PGM’s combustion energy. In calculating catalyst oxidation and internal combustion energy we assumed more specific components rather propane as a model gas following ideal gas behavior in NMOG. This new programing achieved well correlation with SULEV vehicle rather ULEV applied to old Programming (AU-85). Lots of factors for AU-53 were requested in order to correlate test result as input data like engine RPM, A/F, engine displacement, catalyst loading, ratio and even cell density as was used same in AU-85. Consequently by combined major variables comprising of catalyst design we could take on appropriate LOt figures. Here in cold start research we can introduce significantly advanced programming technology comparing to conventional method. Optimized configuration of FCC system could be proposed in cost and performance including PGM loading, ratio and cell density
전경주(Kyoungju Jeon),이중구(Choonggoo Lee),용승열(Seungryoul Yong),박민희(Minhee Park) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
The high fuel dilution in engine oil causes oil viscosity reduction and it is a serious impact on engine wear by oil lubricative degradation. This paper describes the study of engine wear status trough understanding for engine oil degradation degrees and uses one 2.0 liters diesel engine and one vehicle with 2.0 liters diesel engine for these tests. To measure reliable fuel dilution, GC-SIMDIS was used. And to the elements analysis, Spectrometer was used. Also, Engine oil sample test was performed on both the manufactured new engine oil samples for base data set-up and used oil samples from engine bench and fleet vehicle.
가솔린 승용차의 사용 연료의 SG특성에 따른 연비 경향성의 시험적 고찰
김석철(Sukchul Kim),이은아(Euna Lee),용승열(Seungryoul Yong),이중구(Choonggoo Lee) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Fuel Economy is very important one of items to reduce green house gases from vehicles. and Governments have been trying to give their customers the real information of vehicle fuel economy such as real road. According to this, so many car makers have been trying to improve high fuel economy in their productions. Test fuels in worldwide regulations are very various. and fuel economy depends on their characteristics and how to calculate it . This paper shows the fuel economy differences with the used fuels according to fuel characteristics such as fuel density , carbon weight fraction, and net heating values, includes calculations in worldwide regulations.