微型客车发动机的噪声控制  

Noise Control on Some Engine of Micro Passenger Vehicle

作　　者：赵海军 宋伟志 梁凯 周辉 张玉书[1] 陈智勇 

机构地区：[1]天津职业技术师范大学汽车与交通学院,天津300222 [2]洛阳理工学院机械工程学院,河南洛阳471023

出　　处：《内燃机》2018年第1期44-48,共5页Internal Combustion Engines

基　　金：国家自然科学基金项目(U1604161);河南省高等学校重点科研项目(17A535001;17A430024)

摘　　要：采用整车分别运行法获得发动机排气噪声、发动机燃烧噪声、发动机机械噪声、变速器噪声及其它噪声源噪声,分析发现发动机噪声是整车的主要辐射源,对发动机油底壳和消声器进行了一系列改进。结果表明,改进后的油底壳总成振型有明显改善,各阶频率较改进前有较大的提高,不同转速下,插入损失有较大程度的提高,而功率损失有不同程度的降低,车外加速噪声由原来的77.55d B降到73.28d B,降低了4.27d B。A respective operating method of whole vehicle is used to obtain exhausting noise, combustion noise, mechanical noise of engine, transmission noise and other noise source, and it is found by analyze that engine noise is a main noise source of the whole car, and a series of developments are done for the oil sump and muffler. Results show that after development the vibrating mode has a obvious improvement and the whole oil sump the frequency is higher than before, on different speed insertion loss is increaaed greatly, and the power loss decreased in some different extent, and car outside acceleration noise is decreased from 77.55 dB to 73.28 dB, and a drop is 4.27 dB.

关 键 词：噪声测试 发动机 消声器 油底壳 插入损失 

分 类 号：TK411[动力工程及工程热物理—动力机械及工程]