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선우명호(Myoungho Sunwoo),백안선(Anseon Baek),송정훈(Jeonghoon Song) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_2
Current trends indicate that the government is expanding its supply and distribution of Liquid Petroleum Gas as a substitute fuel for Diesel fuel, but there is a lack of research and interest in LPG engines.<br/> Therefore. in order to prevent LPG leakage in LPG engines, a method of installing a pressure sensor in the primary vaporizer chamber and thus allowing the vehicle driver to self-determine LPG leakage is presented here. A method of improving LPG leakage detection and thus preventing error in judgment is investigated and a procedure giving accurate and dependable results for actual vehicle inspections is also presented.<br/>
연료 공급관의 가열이 분사연료의 미립화에 미치는 영향에 대한 실험적 연구
선우명호(Myoungho Sunwoo),천동필(Dongpil cheon),윤팔주(Paljoo Yoon),박승범(Seungbum Park),어윤한(Yoonhan Eo) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_1
This paper presents a strategy to deal with upcoming ULEV regulations. Usually the HC emission is caused by poor fuel atomization during the cold starting and warm-up period.<br/> Improvement on fuel atomization is planned by heating the fuel in fuel-rail. In this experiment, the heated fuel-rail system is constructed to investigate the reduction effects on the size of the fuel droplet by fuel heating. The fuel atomization is examined by measuring Sauter Mean Diameter (SMD) of the fuel droplets from three different types (two-hole, pintle, and six-hole) of injector based upon the returnless heated fuel-rail system.<br/> The result shows that the six-hole type injector with the heated fuel provides the best fuel atomization result in terms of SMD among three different types of injector.<br/>
선우명호(Myoungho Sunwoo),송정훈(Jeonghoon Song),최정환(Junghwan Choi),한만배(Manbae Han) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_2
With the advent of stringent emission regulations, the optimum control of combustion has become a crucial factor in developing vehicles. By using cylinder pressure sensors the combustion process can be analyzed in a direct manner, offering a more efficient method of controlling combustion and emissions. A basic understanding of combustion characteristics and its effect on the cylinder pressure is developed. For a feasibility study, a test bench is setup using pressure sensors, a data acquisition board. an encoder, a personal computer, and other related circuits and systems. A software algorithm for control purposes is also developed and is named P- View.<br/>
차량 주행성능 분석을 위한 자료 획득 장치 개발에 관한 연구
선우명호(Myoungho Sunwoo),이재인(Jaein Lee),이우택(Wootaik Lee),이상준(Sangjun Lee),주원철(Wonchul Ju),최시홍(Sihong Choi),이상태(Sangtae Lee),이현수(Hyunsoo Lee),이경민(Kyungmin Lee) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_1
To evaluate the powertrain performances and driving behavior of a vehicle, it is necessary to survey the driving patterns, which have influences on fuel economy and emissions.<br/> The driving patterns are depended on the driver's habit and the road and traffic conditions. An in-vehicle data acquisition system, which is called Mode Survey System(MOSS), is designed and developed to analyze the driving patterns of the actual driver. Furthermore MOSS would be able to make a common driving mode to be used in emission, fuel efficiency, shift survey, catalyst durability, and other tests using the analyzed driving patterns.<br/> MOSS is a stand-alone system based on the 68HC11 MCU. It mainly consists of an MCU-based Hardware and a PC-based software. MOSS logs various data relating to powertrain and vehicle driving such as vehicle speed, engine RPM, gear position, brake, clutch, fuel consumption, and others. For analysis of the driving data, MOSS software, which is easy to use, can be used to analyze the driving patterns. Both the real-time processing and the post processing function for driving data analysis are available.<br/>
선우명호(Myoungho Sunwoo) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
Global competition of automotive market, affordable prices of electronic components, and tougher regulations on emission, fuel econmy, and safety become the major reason that automotive industries rapidly employ a large number of electric and electronic systems. Considering that the application of electronic technologies for automobile is incresing at a rapid rate, it would be worthwhile to evaluate the trend of the uses of major electric and electronic systems for the 21st century vehicle. To enhance the nation's competitive edge of automotive industries, huge capital investment for developing the major electronic technologies is inevitable. The major technology will be leaded by 32/64-bit micro controller unit(MCU), on-chip flash memory, hybrid ASICs, IGBT, and smart sensors.<br/>