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시내버스 연비평가를 위한 주행모드 개발의 필요성에 관한 연구
임건병(Gunbyoung Lim),박진일(Jinill Park),이종화(Jonghwa Lee),김우석(Wooseok Kim) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Foreign countries are actively developing driving cycles of a bus. In the case of City Bus, there are no driving cycles for fuel consumption test in korea which are considering road conditions and driving patterns. In this paper, the Central Business District(CBD) and New York Bus(NY Bus) driving cycles which have representatively been used in USA were analyzed to consider an alternative driving cycle in korea. The parameters of representative driving cycles were compared with domestic driving patterns which collected during on road operation within the city in Seoul. The results showed that the average velocity, idle times and acceleration of domestic driving were different from those of the CBD and NY Bus cycles. Fuel economy levels also were not similar to those of the CBD and NY Bus cycles. The representative driving cycles are not fit to test fuel economy of domestic buses. This paper discusses the necessity of the city bus driving cycle considering the road conditions and driving pattern to estimate fuel economy in korea.
엔진 웜업시 오일온도에 따른 엔진 마찰이 차량 모드 연비에 미치는 영향
김병수(Byeongsu Kim),임건병(Gunbyoung Lim),이병옥(Byoungohk Rhee),박진일(Jinill Park),이종화(Jonghwa Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently Simulation resulted in developing computer is attempting to experiment vehicle driving not using expensive instruments. It is possible to presuppose fuel economy by changing the characteristic of accessories using CRUISE(vehicle simulation software). In this paper, fuel consumption at each part of the vehicle is analyzed from experiment. The results of fuel economy analysis on experiment substitute for Cruise to measure fuel economy. The achieved simulation data such as engine speed, brake torque, shift pattern, vehicle speed, fuel consumption level is almost equal to experiment data. In this paper, it is performed that warm-up time of engine oil temperature is faster or slower through simulation. The faster engine oil warm-up time is, the more engine friction is decreased. As a result of decreasing of engine friction, fuel economy is improved maximum up to 1.7%.