直喷式柴油机燃烧噪声和活塞拍击噪声的探讨  

A Study on the Combustion Noise and Piston Slapping Noise of DI Diesel Engines

作　　者：卫海桥[1] 舒歌群[1] 韩睿[1] 梁兴雨[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,300072

出　　处：《汽车工程》2004年第6期662-665,670,共5页Automotive Engineering

基　　金：国家自然科学基金资助项目 (5 0 176 0 34);教育部科学技术研究重点项目 (0 30 4 9)。

摘　　要：通过试验方法获取燃烧噪声的传递函数 ,并测量噪声和缸内压力信号 ,用时间窗获取包含活塞拍击噪声的燃烧噪声 ,并与缸内燃烧压力和传递函数计算所得的燃烧噪声进行比较分析 ,得到了活塞拍击噪声出现的频率范围。对活塞拍击噪声的特性进行了进一步分析。In this paper,the tra nsfer function of the combustion n oise and the signals of noise and in-cylinder pressure are measured by experiment.The combustion noise including the piston slapping nois e is obtained by time window and c ompared with the combustion noise calculated from combustion pressur e and noise transfer function,and hence to get the frequency range o f piston slapping noise.Through th e measurement and analysis of the surface vibration signals of the e ngine when cranking and normal run ning,the characteristics of the pi ston slapping noise are further an alyzed.

关 键 词：燃烧噪声 直喷式柴油机 活塞 缸内压力 缸内燃烧 传递函数 试验方法 频率范围 时间窗 比较分析 

分 类 号：TK42[动力工程及工程热物理—动力机械及工程]