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김우석(Wooseok Kim),나천희(Chenhee Na),손유상(Yousang Son) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
This paper investigate the feasibility of developing commercial vehicle for a best fuel economy using a advanced aerodynamic design, an engine down-sizing technology and a vehicle total thermal management etc.; a aerodynamic design achieved by real wind tunnel, an engine down-sizing technology with the engine equipped with 2-stage turbo charger, WCAC(Water-cooled Charged Air Cooler) and 2-stage EGR(exhaust gas recirculation) cooler. It was possible to get over the power limit of the engine with VGT(variable geometry turbo charger) and EGR from 420PS to 460PS, using 2-stage turbo charger, WCAC and 2-stage EGR cooler. 9.1% improvement of a vehicle fuel economy could be accomplished using Aerodynamic design, Down-sizing of engine and Total thermal management. In the case of the variable engine oil pump and the Single Tire, it could be possible additionally to improve a vehicle fuel economy of 2.0%.