Three-dimension design for combustion chamber system in high speed direct-injection engine using KIVA-3V code
To design new combustion chamber system for modern diesel engine three-dimension CFD (computational fluid dynamics) software (KIVA-3V) is used. To improve emission standard original combustion chamber structure (4JB1) is modified and the new one is got. The new combustion chamber structure can fit for modern high-speed CR (common rail) diesel engine and increase compression ratio from 16 to 18.2. Since the new 4JB1 shape of piston head is not on the axis of symmetry, 360° was modeled which corresponds x-offset 4mm and y-offset lmm. Finally, schematic of the test bench configuration and new engine specification are showed. Emissions of the two combustion chamber system are compared based on 13 load conditions with different EGR (Exhaust Gas Recirculation). Besides, when engine speed is 2200r/min, cylinder pressures and the corresponding heat release rates with rail pressure (1200bar) and 30％EGR are compared with experimental data.
high speed engine combustion chamber structure KIVA-3V shape of piston head computational fluid dynamics
LIU Yongfeng QIU Tao TIAN Hongsen XiuxiaLIN
School of Mechanical and Electronic and Automobile Engineering, Beijing University of Civil Engineer School of Mechanical and Vehicular Engineering, Beijing Institute ofTechnology, Beijing 100081, Chin Patent Examination Cooperation Center of SIPO, Beijing 100190, China
国际会议
太原
英文
202-204
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）