发动机作为汽车的主要部件,其性能直接决定了汽车质量的好坏.长期研究发现,发动机只利用了热能的1/3,其余2/3热量都随着冷却空气散入大气,剩余的则被发动机零部件吸收.设备的运行工况及服务年限直接取决于冷却系统设计的合理性.因此,为保证发动机正常工作,必须对这些在高温条件下工作的机件加以冷却.%The engine as the main component of the car, its performance directly determines the quality of the car. Long-term study found that the engine only used one-thirds of heat, and the remaining two-thirds of the heat was scattered into the atmosphere along with the cooling air, the remaining were absorbed by engine parts. Operating conditions and the service life of the device depends directly on the reasonableness of the cooling system design. Therefore, to ensure the normal operation of the engine, these parts working under high temperature conditions must be cooled.
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