发动机工作时,冷却系统必须保持良好的技术状态,才能保证机器正常运转。若冷却系统发生故障,不仅机温升高,润滑油变稀,润滑条件恶化,缩短发动机使用寿命;而且由于机温升高后,充气系数下降,燃油与空气比例失调,燃烧不完全,排气冒黑烟,马力下降,油耗增加;同时缸套、活塞、活塞环、气门与气门座、喷油嘴等零件积炭增加,加剧磨损; Engine work, the cooling system must maintain a good state of technology, in order to ensure the normal operation of the machine. If the cooling system fails, not only the machine temperature increases, the oil thinning, deterioration of lubrication conditions, shorten the life of the engine; and as the machine temperature increases, the inflation coefficient decreased, the fuel and air ratio imbalance, incomplete combustion, exhaust Black smoke, horsepower decline, fuel consumption increases; while cylinder liner, piston, piston rings, valve and valve seat, nozzle and other parts of the coke increase, exacerbate the wear and tear;