配气机构的形式影响充气系数和整机噪声等；
The structure of the air distributing institution has influence on charging efficiency and the noise of engine.
分析了进气总管和进气支管的管长、管径以及进气腔容积对充气系数的影响规律。
The effects of intake chamber volume, diameter and length of inlet duct and inlet manifold on volumetric efficiency were analyzed.
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