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为什么冷车会冒白烟
更新时间: 2020-11-10 00:00:00  

因为汽油燃烧后产生二氧化碳,一氧化碳和水,当环境温度过低时,水汽会凝结,排气就会冒白烟,就好比冬天咱们呼吸会冒白气一样,排气管温度低,发动机排气中的水分在排气管中凝结排出变成可见的白烟,当排气管变热了之后,发动机排气经过排气管时水份被高温蒸发了,所以看不到白烟了,汽车因为排气管很长,发动起排气的温度不足以在低环境温度下让排气管热起来,所以排气会一直有白烟,还喷水呢!

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