Abstract: Engine maintenance is a precise maintenance process, and the parameters of each component and the coordination parameters between components directly affect the quality and effect of engine repair. This article introduces an important parameter of the automobile engine that is often overlooked during the maintenance process: valve chamfer. By following a maintenance case, from the fault phenomenon to the diagnosis process, test drive process, to the final analysis of the fault cause, it demonstrates the profound impact of the valve chamfer parameter on engine performance. At the same time, it summarizes the practical experience of engine maintenance and also provides a reference for automotive maintenance technicians.

Key words: automobile engine; maintenance; valve chamfer; parameter

摘要： 发动机维修是一个精密的维修过程，各个部件的自身参数以及部件之间配合参数，都 直接影响发动机维修质量和维修效果。文章介绍了汽车发动机在维修过程中经常容易被忽 视的重要参数，即气门倒角，通过跟随维修案例，从故障现象到诊断过程、试车过程，到最 终故障原因分析，展现出气门倒角参数对发动机性能的深刻影响，同时总结了发动机维修的 实践经验，也为汽车维修技术人员提供参考。

关键词: 汽车发动机；维修；气门倒角；参数