高速路上噪声大是什么原因

2019-10-22 作者：chenmiaoling

　　【太平洋汽车】高速路上噪声大是由于发动机噪音、轮胎噪音、风躁以及其它的排气噪音、制动系统噪音、车身结构噪音等原因引起，可以尝试做整车的隔音降噪处理，但还需注意选择防火耐热等级高、重量轻的吸音材料。

高速公路上动辄上百的行驶速度，车内的噪音会非常的大，主要来自以下几方面的原因：

1、风噪，声的大小和车身的外形有关，这是受设计的影响，不会突然变化。如果汽车的行驶风噪声突然增大，大都是车身局部出现了变形，或者是有较大的破损。除了车身会产生行驶风噪声之外，在高速行驶时，通过各处间隙，把车厢内的空气吸出去，也会产生很大的声响。如果汽车的行驶风噪声时大时小，最好检查下车门周围的橡胶密封条，听一听有无漏风之处。降低风噪主要是解决车子的密封性。

2、胎噪，胎噪的大小和时速、载荷、轮胎花纹等有最直接影响，轿车70%的胎噪来自于其花纹的设计，胎噪大时首先应保证胎压在适合的范围，轮胎无破损和过度磨损，车辆无明显超载。

3、发动机噪音和发动机的设计及其运转情况有关，这其中最重要的便是发动机的保养。良好的润滑和工况好的零部件是保证发动机良性运转的前提，而当发动机在很好的工作状态下，其实际噪音就是车辆的设计水平。（图/文/摄：太平洋汽车网陈妙玲）

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