汽车发动机水冷却系的维护工艺.docVIP

郑州交通职业学院 毕 业 论 文 论文题目：汽车发动机水冷却系的维护工艺 所属系别 汽车运用工程 专业班级 姓　　名 学　　号 指导教师 撰写日期 2010 年 5 月 摘 要 随着汽车的普及，汽车已走进寻常百姓家，接下来我将介绍水冷却系各部分的维护工艺。熟悉发动机冷却系的各种不同构造原理及其功能，最重要的是对发动机冷却系的维护工艺有个清晰的认识并了解冷却系的重要性！掌握冷却系主要部件散热器、节温器、水泵等的检查、维护与调整的方法，冷却系的作用是吸收和散发掉发动机的多余热量，以保证发动机在适宜的温度下工作。冷却系的主要故障是冷却不良、温度过高，引起发动机过热，它们对发动机的动力性、经济性、安全可靠性产生很大影响 Abstract Familiar with engine all kinds of structure principles and functions of cooling the department, the most important thing is that there is a clear understanding to the engine maintenance craft of cooling the department! The grasp cools the department main part radiator, festival warm device, water pump, inspection, maintenance and method that adjust cool function of department have to absorb and send out by heats surplus to lose engine, so as to ensure the engine works at suitable temperature. Cooling system of main job is to be in the air heat to prevent engine overheat, but there are other important cooling system. The car engine temperature condition in the proper operation conditions. If the engine cold will accelerate components, thus make the wear and efficiency of engine emits more pollutants. Therefore, the cooling system is another important role as soon as possible, and to make the engine temperature to keep the temperature.The main trouble of the department is cooled badly, temperature is too high to cool, it is overheated to cause the engine, their power, economy, very great influence of safe reliability production on the engine. Key Words：Coolingsysten, thermostat, radiator, cooling fluid 目 录 1引言 1 2冷却系的简介 1 2.1冷却系的定义 2 2.2 冷却系原理 3 2.2.1小循环 3 2.2.2小循环、大循环同时存在 3 2.2.3大循环 3 2.3 冷却系作用及故障影响 3 2.3.1过热 4 2.3.2 过冷 4 3冷却系的维护工艺 4 3.1散热器的检查与维护 4 3.2水泵的检查与维护 5 3.3 水泵皮带的检查与调整 6 3.4节温器的检查与维护 6 3.4.1蜡式节温器 6 3.4.2折叠式节温器 7 3.5风扇的检查与维护 8 3.6 硅油风扇离合器的检查与维护 9 3.6.1 硅油风扇技术性能的测试 9 3.6.2 硅油风扇离合器检测与维护 9 4故障分析 10 4.1冷却液泄漏 10 4.2发动机温度过高 11 4.3发动机温度过低 11 4.4检查散热器风扇电机工作状态是否正常 12 4.5管道破裂 13 4.6驱动带断裂 13 4.7水泵损坏 13