论汽车发动机配气机构维修及发展现状.doc

2013届专科毕业设计（论文） 题 目：论汽车发动机配气机构维修及发展现状 班 级：　2011级 学 号：　 　　 姓 名：　覃 俊 指导教师： 何允萍 2013年3月 论汽车发动机配气机构维修及发展现状 学生姓名： 覃俊 学 号： 所在函授站 ：长沙理工大学柳州函授站 班 级： 2011级 指导教师： 何允萍 完成日期： 2013年3月 目 录 1配气机构的组成··················································1 1.1 气门组··························································1 1.1．1气门··························································1 1.1．2门导管························································2 1.1.3气门座························································2 1.1.4气门弹簧······················································2 2气门传动组·······················································3 1.2.1凸轮轴························································3 1.2.2气门挺柱······················································4 1.2 .3推杆··························································4 1.2. 4摇臂与摇臂轴··················································4 3常见故障现象····················································5 1.3 .1气门座圈响····················································5 1.3 .2气门漏气······················································5 1．3. 3气门脚响······················································6 1．3 .4气门弹簧晌····················································6 4维修过程中注意事项·············································6 1.4.1气门的光磨····················································6 1.4.2气门座的铰削··················································7 1.4.3气门的研磨····················································7 1.4.4气门导管的铰削················································7 1.4.5凸轮轴轴承的刮削··············································7 1.4.6气门脚间隙的调整··············································7 5现状与发展·······················································8 1.5.1内燃机凸轮机构的现状··········································8 1.5.2内燃机凸轮配气机构的发展前景··································8 1.5.3由孤立研究到系统研究··········································9