发动机进气啸叫降噪研究  

Research on Noise Reduction of Engine Inlet Air Whistling

作　　者：刘影[1,2] 袁卫平[2] 倪计民[1] 

机构地区：[1]同济大学汽车学院,上海201804 [2]上海汽车集团股份有限公司商用车技术中心,上海200438

出　　处：《内燃机工程》2016年第6期133-137,共5页Chinese Internal Combustion Engine Engineering

摘　　要：采用理论计算与试验验证相结合的方法，基于平面波假设建立消声器设计的理论模型，通过台架试验与整车试验相结合进行方案验证。通过设计三腔并联共振式进气消声器可有效消除由增压器产生、通过进气系统向外辐射引起的啸叫声。在630～850Hz频率范围内插入损失达16dB（A），在1700～2300Hz频率范围内插入损失达9dB（A），主观评估啸叫声有2分的显著提升。理论计算模型可以在频率上实现准确预测，消声量预测上相比试验值高1．4dB（A）。By using the method of theoretical calculation and experimental verification, the theoretical model of mufflcr design was established, based on the assumption of the plane wave, and then the design scheme was validated by bench test and vehicle test. The designed three cavity parallel connected resonant inlet muffler can effectively eliminate the whistling caused by the turbocharger and radiated outward through the inlet system. The insertion losses reach 16 dB （A） in the frequency range of 630~850 Hz, and is 9 dB （A） in the frequency range of 1 700 ~ 2 300 Hz~ while the subjective assessment of whistling has a significant improvement Of 2 points. The theoretical calculation model can accurately predict the frequency, and the predicted noise reduction is 4~5 dB（A） higher than the test value. The theoretical calculation model of this study can be used to design the muffler effectively in order to provide a reliable and convenient method for reducing the nuisance noise from the engine inlet system.

关 键 词：内燃机 进气啸叫 降噪 共振消声器 插入损失 

分 类 号：TK411.6[动力工程及工程热物理—动力机械及工程]