冬季天气寒冷，为了减少天天放冷却水的麻烦，并防止因忘记放冷却水而冻坏机体，可给发动机的冷却系统加注防冻液，现在常用的防冻液主要有乙二醇、乙醇、甘油、甘油—乙醇等。由于这些防冻液的成分及配制比例不同，使得其凝点也有所不同，因此，选用时应根据当地的气温条件、 Winter cold weather, in order to reduce the daily chilling water trouble, and to prevent the forgetting to put the cooling water and freeze the body, the engine cooling system can be antifreeze, the commonly used antifreeze are mainly ethylene glycol, ethanol, glycerin , Glycerol-ethanol and the like. Due to the composition of these antifreeze and the preparation of different proportions, making the freezing point is also different, therefore, the selection should be based on local temperature conditions,