摘要
针对Scuderi分开循环式发动机,建立参数化模型并进行一维仿真计算,在结果可靠的基础上应用响应面方法对关键设计参数(压缩缸上止点与膨胀缸上止点之间的相位差,压缩比,膨胀比,压缩缸交换阀和膨胀缸交换阀的配气正时值、最大气门升程值)及发动机动力输出特性进行了仿真优化研究。结果表明:膨胀缸交换阀关闭时刻是分开循环式发动机动力性能的最重要影响参数,优化后的发动机在保证不爆燃的条件下,四种工况的输出转矩都有提高,平均转矩提高了3.79N·m,实现了设计目标的最优化。
To develop Scuderi split-cycle engine, a parametric model is established and 1D simulation is calculated. On the basis of reliable models, key design parameters, such as the top dead center phase difference between the compressor cylinder and the expander cylinder, compression ratio, expansion ratio, valve timing and maximum valve lift values of the compressor cylinder and the expander cylinder, and engine power output characteristics, were optimized based on simulation with response surface method. The results show that the expander cylinder exchange valve closing time is the most important influence parameter. After optimization, the output torque of four conditions were improved under the condition of guarantee no deflagration, and the mean torque was improved by 3.79N.m. The optimization of the design goals is achieved.
出处
《机械设计与制造》
北大核心
2014年第6期130-133,共4页
Machinery Design & Manufacture
基金
国家自然科学基金项目资助(61262048)
