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为了充分发挥柴油机的动力性与经济性,延长其使用寿命,在运转时,必须保持冷却水温在一定的范围内。很多机车的说明书上都规定,作业中应经常保持柴油机水温在80～90℃之间。柴油机水温比较低的时候,缸壁的温度也就比较低,于是气缸里的水蒸气便凝结于缸壁上(1千克柴油燃烧后会产生出大于1千克的水蒸气)。柴油在气缸里燃烧时生成的另一些燃烧产物,遇到了冷凝于缸壁上的水,就会变成强烈的腐蚀剂(如亚硫酸)粘附在缸壁上,于是气缸壁就会受到强烈的腐蚀。
In order to give full play to the dynamic and economic diesel engine to extend its life, in operation, you must keep the cooling water temperature within a certain range. Many locomotive instructions are provided, homework should always maintain the diesel engine water temperature between 80 ~ 90 ℃. When the temperature of the diesel engine is low, the temperature of the cylinder wall is relatively low, so the water vapor in the cylinder condenses on the cylinder wall (more than 1 kg of water vapor is generated after 1 kg of diesel oil burns). Some of the other products of combustion that diesel generates when it burns in the cylinder encounters the condensation of water on the cylinder walls and becomes a strong corrosive agent (such as sulfurous acid) that adheres to the cylinder walls, so that the cylinder walls are strongly corrosion.