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A Study to Optimize a Commerical Vehicle Fuel Consumption Using Vehicle Simulation
Myungseok Lyu,Steven Whelan,Ben Rogers 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_1
An approach to optimizing vehicle fuel economy is described based on a study of a commercial vehicle. The approach is based on using a V-SIM software vehicle simulation to identify the relative efficiency of each of the vehicle systems, such as the engine hardware, engine software calibration, transmission, cooling system and ancillary drives. The simulation based approach offers a detailed understanding of what vehicle systems are underperforming and by how much the vehicle fuel economy can be improved if those systems are brought up to best-in-class performance. In this way, the optimum vehicle fuel economy can be provided to the vehicle customer. A further benefit is that the simulation requires only a minimum of vehicle testing for initial validation, with all subsequent field test cycles performed in software, thereby reducing development time and cost for the manufacturer.
류명석(Myungseok Lyu),신재영(Jaeyong Shin),진봉용(Bongyong Jin) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This study was initiated to evaluate the cooling performance of CAC (charged air cooler) and radiator in the engine room of a mini bus. So we had firstly to predict the mass flow rate coming from radiator grille and front bumper opening using computational fluid dynamics (CFD) simulation based on 3D configuration. And simulations were carried out for different cooling module layout and bumper opening hole size on same vehicle operating condition. Simulation results show that CAC cooling performance at reverse protecting plate-applying model was much efficient than that of the bumper opening hole size-increasing model in IMTD point of view. Part of the CFD simulation results was compared to with experimental data It was confirmed that the CFD approach using STAR-CD based on pursuing no-compromise solution could provide design engineers with useful design information in the early design stage of vehicle development<br/>
[디젤엔진부문] Common Rail을 이용한 분사압력변화가 소형 HSDI 디젤엔진의 Smoke 및 연료소모량에 미치는 영향
신범식(Buomsik Shin),류명석(Myungseok Lyu),최규훈(Kyuhoon Choi) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Great attentions are paid to HSDI diesel engine for passenger car because of its high thermal efficiency. Most development research in HSDI diesel engine is focused on applying common rail system as a fuel injection equipment. In this study, a series of tests are carried out to investigate the effect of injection pressure variations by common rail on the smoke and fuel consumption in a small HSDI diesel engine. As a result of this study it is concluded that there is an optimum rail pressure dependent on combustion system such as nozzle type, combustion chamber geometry.