OS1-3 Thermal Efficiency improvement by increasing compression Ratio and Reducing Cooling Loss(OS1: Ultimate thermal efficiency,Organized Session Papers)

Abstract

For further improvement of thermal efficiency, it is necessary to focus on reducing cooling loss and exhaust loss aggressively. In this research, applying a CAE analysis coupling a 0-dimensional combustion analysis and a 1-dimensional heat conduction analysis, the influence of combustion chamber surface conditions such as heat conductivity, specific heat and engine specifications was parametrically investigated. Based on these results, the thermal efficiency and fuel economy improvement potential were unveiled.