论汽车转向系的诊断与检修讲述.doc

题 目： 论汽车转向系的诊断与检修 所属系部： 汽车工程学院 专业班级： 汽车检测与维修技术13-1班 学生姓名： 张飞 指导教师： 李学 2016 年 4 月 30 日 摘 要 转向系是汽车行驶的指南针，它的好坏关系着汽车能否安全行驶。本文首先讲述了汽车动力转向系的整体结构；具体介绍了它的功用；分类和工作原理。然后具体对轿车动力转向系统常见的几种故障：一转向沉重，二转向时有噪声，三方向盘自由行程过大，四左右转向时轻重不一，五转向时转向盘强烈抖动，六汽车直线行驶时，转向盘发飘或跑偏。最后讲述了轿车动力转向系中转向盘的自由行程，转向储液罐的液面高度，液压泵的泵送压力，液压系统的密封性，转向柱的检查方法以及通过轿车动力转向系的故障现象进行了诊断分析和检修。对使用和维护汽车有着很现实的意义。 关键词：轿车；转向器；故障分析?；检查维修 目 录 摘 要································································1 1 汽车转向系统的简介···············································5 1.1 汽车动力转向系统的组成································5 1.2 汽车动力转向系统的工作原理····································8 2 轿车动力转向系统故障分析······································11 2.1 转向沉重···················································11 2.1.1 故障现象····················································11 2.1.2 故障原因····················································11 2.1.3 故障诊断与排除 ············································12 2.2 转向时有噪声····················································12 2.2.1 故障现象·····················································12 2.2.2 故障原因·····················································12 2.2.3 故障诊断与排除···························12 2.3 方向盘自由行程过大·············································13 2.3.1 故障现象·····················································13 2.3.2 故障原因····················································13 2.3.3 故障诊断与排除···························13 2.4 左右转向时轻重不一·············································13 2.4.1 故障现象·····················································13 2.4.2 故障原因····················································13 2.4.3 故障诊断与排除···························13 2.5 转向时转向盘强烈抖动·········································14 2.5.1 故障现象·····················································14 2.5.2 故障原因···············································