为了使发动机工作可靠、耐久并获得良好的动力性和经济性指标,冷却系必须在发动机工作的任何工作状态和任何可能的环境温度下,都应使发动机在最适宜的温度范围内工作。若冷却系的技术状况变化使发动机的工作温度不正常,便出现发动机过冷或过热的各种故障。冷却系常见的故障是引 In order to make the engine work reliably, durable and obtain good power and economic indicators, the cooling system must be in the engine at any working conditions and any possible ambient temperature, the engine should be in the most suitable temperature range work. If the cooling system changes in the technical conditions of the engine operating temperature is not normal, there will be a variety of engine overheating or cold failure. Cooling system is a common fault cited