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冬季天气寒冷,为了防止冻裂发动机机体,发动机冷却系统内需加注防冻液。目前常用的防冻液有乙醇、乙二醇、甘油和甘油-乙醇等,这些防冻液由于配制比例、成分不同,其凝点也不同。一般情况下,所选用的防冻液的凝点应低于本地最低气温的10~15℃,以免气温低于防冻液的结冰点,使防冻液失去保护作用。使用防冻液进应注意以下几点:1.加注防冻液前,应先清除冷却系统的水垢,并放净残水以免冲淡防冻液,降低防冻液的结冰凝点。
Cold weather in winter, in order to prevent the fissure of the engine body, the engine cooling system within the need to add antifreeze. The commonly used antifreeze are ethanol, ethylene glycol, glycerol and glycerol - ethanol, these antifreeze due to the preparation of the proportion of different components, the freezing point is also different. Under normal circumstances, the freezing point of the selected antifreeze should be lower than the local minimum temperature of 10 ~ 15 ℃, so as to avoid air temperature below the freezing point of antifreeze, antifreeze loses the protective effect. The use of antifreeze should pay attention to the following points: 1. Before adding antifreeze, you should first remove the scale of the cooling system and put a net residual water so as not to dilute the antifreeze, reduce the antifreeze freezing freezing point.