东风、东风_3型内燃机车的空气滤清器原设计为油浴式,大修时,成都机车工厂将其改为旋风筒式。这种空滤器对气候温润的西南地区是合适的,但对风沙较大或冬季气温较低的西北、东北和中原地区来说,不但滤清效果差,而且使柴油机进气温度较低,因此造成缸套裂纹,活塞环早期磨损情况严重。 Dongfeng, Dongfeng _3 diesel locomotive air filter was originally designed for oil bath, overhaul, the Chengdu locomotive factory will be replaced by cyclone tube. This type of air filter is suitable for a warm climate in the southwestern region, but for the northwestern, northeastern and central China regions with large winds or cold temperatures in winter, not only is the filtration effect poor but also the engine inlet air temperature is low, therefore Cause cylinder liner cracks, piston ring early wear and tear is serious.