直喷发动机高压系统NVH研究

Study About the NVH of High Pressure Fuel Supply System

为了提高发动机的性能,并且更好地做到发动机小型化,现在很多发动机都采用直喷供油系统。直喷供油系统压力很高,这也就导致在工作过程中会产生一些振动和噪音。为了解决这些噪音,主要从主动降噪和被动降噪两个方面进行分析。从主动降噪方面来说,可以使用隔音棉来包裹零部件;从被动降噪方面来说,通过改变零部件结构来改变零部件的固有频率。

In order to increase the performance and downsize the engine,more and more engine use direct injection fuel system. The working pressure of the GDI is very high, so some noise and vibration are coming. We can solve these problems in two ways, activity and passivity. Package the component use sound-absorbing cotton and change the inherent frequency of component.