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듀얼 스파크 플러그 적용 엔진의 연소 및 연비 특성 연구
김대광(Daekwang Kim),김영재(YoungJae Kim),이병옥(Byoungohk Rhee),박진일(Jinil Park),이종화(Jonghwa Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Fuel economy is one of the major issues in regard to energy and environment. Customers demand the improvement of fuel efficiency and drive ability. because of this cause, I make an experiment and simulation on DSP engine which can improve fuel efficiency and drive ability. Dual spark plug(DSP) system engine can realized the customers desire. As a result of an engine test, The DSP system engine shows fast combustion and high thermal efficiency. Indicated thermal efficiency of DSP system engine compared with SSP system engine is improved up to 2~4%. Also, DSP system engine shows the improvement of 2~5% fuel consumption rate at the main driving zone. COV indicated drive ability is about 1%. According to a result of simulation, DSP engine appears to be increasing 4.7% fuel efficiency.
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%.
과도운전 구간에서의 연비인자 거동 및 이를 고려한 모드연비 시뮬레이션
이동규(Dongkyu Lee),김대광(Daekwang Kim),이병옥(Byoungohk Rhee),박진일(Jinil Park),이종화(Jonghwa Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The fuel energy injected into a vehicle is dissipated at subsystems of the vehicle including engine, transmission, drive-train, etc. In this study, a new methodology analyzing contributiveness of vehicle subsystem on fuel economy is proposed. Finding optimal combination of subsystems is as much important as improving efficiency of each subsystem for vehicle fuel economy. In order to achieve it, the simulation of vehicle fuel economy is performed using commercial software. Most of the subsystems are modeled for this simulation and vehicle tests are carried out to get model coefficient. The result of simulation on fuel economy is compared to that of vehicle test. Especially, the result of a simulation considered transient states shows under 1% of error comparing with a test on a chassis-dynamometer.