The laser vibrometer based on the surface vibration for measuring and analyzing the radiating noise of the 4120SG diesel engine is proposed.
以4120SG柴油机为研究对象，提出基于激光测振的表面振动法测量柴油机辐射噪声。
In this paper, spectrum analysis is carried out for 4102Q diesel engine to investigate the effect of parameters adjustment on noise emission, and to determine its noise sources.
本文通过对4102Q型柴油机噪声的频谱分析与研究，了解该型柴油机参数调整对噪声的影响；
So flow in diesel engine affects dynamic performance, fuel economy, burning noise and emission formation etc, moreover directly affects reliability and durability of diesel engine.
因此，柴油机的流动不仅关系到柴油机的动力性、经济性、燃烧噪音和有害废气生成，而且还直接影响到柴油机的可靠性和耐久性。
The paper reports the results of an investigation of the characteristic of combustion pressure oscillation in a D. I. diesel engine and their effect on engine noise.
本文报告了对直喷式柴油机燃烧压力振荡特性及压力振荡对燃烧噪声影响规律的研究。
If the diesel engine has a superior economic performance, a dependable work, and if the noise and the vibration can be controlled in a lower limit, which usually depends upon its valve train system.
一台柴油机的经济性能是否优越，工作是否可靠，噪音与振动能否控制在较低的限度，常常与其配气机构的设计是否合理有密切关系。
Several Suggestions for controlling the main noise sources, to reduce noise of this diesel engine are presented.
提出了控制主要噪声源的一些建议，以便于进一步降低该柴油机的噪声水平。
This offers an effective means for diesel engine vibration and noise control, condition monitoring, and cylinder pressure recognition.
为柴油机的振动噪声控制、状态监测，以及缸内气体压力的识别提供了一种有效的方法。
The noise of 4110Q diesel engine and its oil pan, flywheel cover, oil pump, valve chamber has been studied by the analysis system of B&K3560 in the normal Semi-anechoic chamber.
在标准半消声室，用B&K3560噪声测量分析系统对4110Q柴油机整机和油底壳、飞轮壳、喷油泵、摇臂罩等零部件的噪声进行了台架试验研究。
This paper focuses on the noise reduction of the 4102 diesel engine. Through the diesel engine test, the noise sources are identified.
为了降低4102柴油机的辐射噪声，通过试验进行了4102柴油机噪声源的识别研究。
Based on the tests for emulsified diesel oil on a diesel engine, this paper presents test research on economical results, startability, vibration, noise, exhaust gas constituent and smoke.
本文以试验研究为基础，对柴油机燃用乳化油的节能效果，以及对柴油机起动性能、振动、噪声、排气成份和烟度等做了试验研究，并对乳化油生成及节能机理进行了论述。
The result shows that this method can promote the signal-noise ratio and the extracted characteristics reflect the change of the technical states of diesel engine.
分析结果表明，此方法能够提高信噪比，提取的振动信号特征能够反映柴油机技术状态的变化。
In the organism is processed, the processing quality of the precise bore hole process will influence the performance, such as power, oil consumption, noise of the diesel engine, etc. directly.
机体加工中，精镗孔工序的加工质量将直接影响柴油机的功率、油耗、噪声等性能。
The prediction of this diesel engine main noise sources and their contribution to engine sound power is carried out accords with experiment result.
对该柴油机的主要辐射噪声源及其对整机噪声声功率的贡献度以及整机的辐射噪声进行了预测，预测结果与实测结果基本吻合。
ZS195 diesel engine fueled with high proportion DME exhaust contains no smoke, noise also decreases, and the NOX exhaust obviously decreases.
燃用高比例二甲醚燃料，可使发动机在全负荷范围内达到无烟排放，NO_x有较大幅度下降，噪声减小。
ZS195 diesel engine fueled with high proportion DME exhaust contains no smoke, noise also decreases, and the NOX exhaust obviously decreases.
燃用高比例二甲醚燃料，可使发动机在全负荷范围内达到无烟排放，NO_x有较大幅度下降，噪声减小。
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