陈卫锋;候俊香;

1:盐城兴动机械有限公司

    摘要：设计了发动机噪声试验,试验结果表明:随着发动机转速和负荷的增大,噪声增大,转速对发动机噪声的影响比负荷更加明显;随进气管真空度的增大,噪声降低;发动机整机噪声中,进气噪声的影响最大,其次是油底壳,皮带轮。针对发动机不同的部位,进行有针对性的降噪措施,可以降低整机的噪声,提升发动机性能。

    关键词： 噪声源;;噪声频谱;;降噪

    Abstract: Tests were designed to the engine noise.The results show that noise rises while the engine speed and the load increase.The impact of engine speed causes noise much apparently compared to load.Noise reduces when the vacuum of intake manifold gets higher.Engine intake noise gives a greatest impact to engine noise level,which is followed by the oil pan and pulleys.Measures for engine noise reduction regarding to different noise source should be provided in order to reduce the machine noise and improve the engine performance.

     Keywords: Noise Source;Noise Spectrum;Noise Reduction

     基金项目: 河南省教育厅自然科学研究计划项目(2008A470008)

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