The most efficient intake systems utilise an air box which is sized to complement the engine and will extend the power band of the engine.
利用进气系统最有效的盒子，里面有一个空气大小的引擎和补充电力乐队将延长引擎。
Owning to the instantaneous nonlinear characteristics of vibration signals from diesel engine, a new method for identifying characteristic frequency band is put forward by adopting its IMF component.
针对柴油机振动信号的瞬时非线性特点，提出采用柴油机振动信号的IMF分量进行特征频带识别的新方法。
Results show that the modification could ameliorate the diesel engine"s structural sound radiating condition in the studying frequency band."
主要声学量的对比结果表明，在所研究的频率域内，修改措施对改善低频域内整机外场声辐射情况具有较为明显的作用。
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