题目：吉利JLH-4G20TD发动机高压油管与通气阀装配工艺设计目录1．高压油管与通气阀........................................................................................................11.1高压油管与通气阀简介........................................................................................11.2高压油管与通气阀的组成....................................................................................12．装配的安全操作规程....................................................................................................12.1一般要求................................................................................................................12.2工作前要求............................................................................................................12.3工作中要求............................................................................................................22.4工作后要求............................................................................................................23．高压油管与通气阀的装配工艺....................................................................................23.1安装高压油管........................................................................................................23.2预紧高压油管........................................................................................................33.3拧紧高压油管........................................................................................................43.4安装通气阀............................................................................................................53.5拧紧通气阀............................................................................................................53.6发动机放行............................................................................................................63.7物料的换箱............................................................................................................64.常见问题分析..................................................................................