涡轮增压直喷汽油机NVH性能改善的仿真与试验研究  

Simulation and Experimental Study on the NVH Performance Improvement of a Turbo-charged GDI Engine

作　　者：王伟民[1] 王江涛[1] 陈涛[1] 张志明[1] 史来锋[1] 范富贵[1] 马明堂 林运 

机构地区：[1]东风汽车公司技术中心,武汉430058 [2]李斯特技术中心(上海)有限公司,上海201206

出　　处：《汽车工程》2014年第10期1189-1192,1196,共5页Automotive Engineering

摘　　要：为改善一款涡轮增压直喷汽油机的NVH性能,进行了机构动力学、整机振动和辐射噪声分析,找出了原机NVH性能的薄弱部位,据此对有关零部件进行了结构改进并再次进行NVH性能改进效果的仿真预测。试验验证结构表明,辐射噪声仿真预测方法和一系列的结构改进措施十分有效。另外,文中还对与涡轮增压直喷汽油机NVH性能相关的增压器和高压燃油喷射系统噪声问题进行了分析。To improve NVH performance of a turbo-charged direct injection gasoline engine,the mechanism dynamics,engine vibration and radiated noise are analyzed and the regions with poor NVH performance are located.Based on these,structural modifications are carried out on related components with a simulation prediction on the effects of improvements in NVH performance conducted. The results of verification test show that the method used for the simulation prediction on radiation noise and the measures adopted of structural modifications are very effective. In addition,the noise issue of turbocharger and high-pressure fuel injection system related to the NVH performance of turbo-charged direct injection gasoline engine is also analyzed.

关 键 词：涡轮增压直喷汽油机 辐射噪声 NVH性能仿真预测 增压器噪声 喷油系统噪声 

分 类 号：U464.171[机械工程—车辆工程]