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柴油机在运用时,必须通过冷却,因为柴油机工作时的燃烧温度可高达2000℃左右。若不加冷却,则柴油机的零件刚度将因受热下降;运动件将由于膨胀不一致而被咬死;气缸内的充气系数下降而功率降低;润滑油膜破坏而磨损加剧,所以必须加以冷却。对于水冷柴油机,最合适的水温是75℃～95℃。 但到冬天宿车时,冷却水则必须放掉。否则将造成严重的损失,使机体或缸套、水泵炸裂。在冬天机内冷却水能把柴油机炸裂,是因为水的反常膨胀所致。水在温度变化的情况下,不是
Diesel engine in use, must pass through the cooling, because the combustion engine when the combustion temperature can be as high as about 2000 ℃. Without cooling, the rigidity of the diesel engine parts will be reduced due to heat; moving parts will be killed due to inconsistent expansion; the air cylinder coefficient of decline and reduced power; lubricant film damage and wear increased, it must be cooled. For water-cooled diesel engine, the most suitable water temperature is 75 ℃ ~ 95 ℃. However, the cooling water must be released when the car is stopped in winter. Otherwise it will cause serious losses, so that the body or cylinder liner, pump burst. Cooling water in the winter machine can burst the diesel engine because of the abnormal expansion of water. Water does not change in temperature