摘要
介绍了实现HCCI燃烧的不同内部EGR策略,分析了排气门晚关策略和负气门重叠策略下EGR率计算方法,编写了两种策略下EGR率的C语言计算程序,并对两种策略下的不同工况进行了计算。计算结果显示:随着负荷的增大EGR率逐渐降低;在较为宽广的负荷范围内,排气门晚关策略下的计算程序误差限小于4%;负气门重叠策略下的EGR率计算程序简洁实用。
The different internal EGR strategies of HCCI combustion were introduced,the calculation methods of EGR rate under the late exhaust valve closing and negative valve overlap strategy were analyzed,the C program of EGR rate for the two strategies was programmed and finally the EGR rates of the two strategies under different conditions were calculated.The results show that the EGR rate decreases gradually with the increase of engine load.Within a wide load range,the error that is produced by the program is smaller than 4% under the late exhaust valve closing strategy.Moreover,the program of negative valve overlap strategy is brief and practical.
出处
《车用发动机》
北大核心
2010年第6期42-45,49,共5页
Vehicle Engine
基金
国家重点基础研究发展规划资助项目(2007CB210004)
吉林省科技发展计划项目(20090556)
