《宝马完全可变气门技术(毕业设计）》.docVIP

编号 南京航空航天大学金城学院 毕业设计 题 目 可变气门宝马发动机研究 学生姓名 学 号 系 部 机电工程系 专 业 车辆工程 班 级 指导教师 杨海青 副教授 二〇〇八年六月 南京航空航天大学金城学院 本科毕业设计（论文）诚信承诺书 本人郑重声明：所呈交的毕业设计（论文）（题目：采用完全可变气门机构的宝马发动机新技术分析）是本人在导师的指导下独立进行研究所取得的成果。尽本人所知，除了毕业设计（论文）中特别加以标注引用的内容外，本毕业设计（论文）不包含任何其他个人或集体已经发表或撰写的成果作品。 作者签名： 杨胜 日期： 2009 年 5月20 日 （学号）：2005012139 完全可变气门驱动机构的宝马发动机新技术分析 摘 要 汽油机可变气门技术作为一种性价比相当高的技术方案，得到了广泛的应用。特别是近几年由于油价的攀升和日趋严格的环保法规 The technical analysis of the new BMW engine equipped with the fully variable valve actuation mechanism Abstract Recently gasoline engine adopting the variable valve timing mechanism as a effective technology has been a wide range of applications. In particular, due to rising oil prices and increasingly stringent environmental regulations, coupled with relatively mature technologies and lower costs, the technology in a number of high-end vehicles have begun to be adopted. In this paper, aiming at modern cars with the latest technology in gasoline engine，Carrying on a technical analysis which is the structure and principle of the new series of BMW adopting the variable valve timing mechanism ,thus receive the comprehensive analysis of the report of the new BMW series engines technical characteristics. The main research contents includes: take completely variable air valve technique as a main research object, carry on analysis to the structure and the work principle of BWM adopting the variable valve timing mechanism, further understanding of variable valve timing technology. Secondly, conducting research and analysis to the other new technologies on the new BMW-engine ,such as DISA-controlled variable intake system, cylinder gasoline direct injection technology and the mixture formation and combustion of the dual-mode control strategy, the latest gasoline engine exhaust after-treatment technology-NOx storage-type catalytic converter of the working principle, gasoline engine EGR control the technology works ,the new techno