摩托车CG发动机双凸轮配气机构设计与分析  

Design and Analysis of Double Cam Valve Train in CG Motorcycle Engine

作　　者：张力[1] 黄新华[1] 吴国辉[1] 黄永生[2] 王先国 

机构地区：[1]重庆大学机械工程学院,重庆400030 [2]装甲兵技术学院,长春130117 [3]重庆宗申动力机械股份有限公司,重庆400054

出　　处：《机械科学与技术》2011年第4期517-521,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：重庆市自然科学基金项目(2007BA6026);重庆市科技攻关计划项目(2007AA6006-6)资助

摘　　要：摩托车CG发动机采用单一凸轮控制进排气过程,已不能满足市场对性能与排放的要求。本研究基于原凸轮轴下置式配气机构,修改下摇臂与凸轮轴向接触宽度,把原单凸轮分开为进排气双凸轮。采用气门分段加速度函数法重新设计进排气凸轮和气门配气相位,对新设计凸轮进行运动学和动力学计算分析,保证新设计双凸轮配气机构具有良好的可靠性。实验研究了采用双凸轮配气机构的发动机对动力性,经济性,可靠性的影响。新设计双凸轮配气机构在国内第一次实现了产业化。Motorcycle CG engine intake and exhaust process are controlled by a single cam,which can not meet the performance and emissions requirements.We studied the valve train with side-mounted camshaft,revised its rocker arm and the cam′s contact width of the shaft,changed the original single-cam into double cams with one for the intake and the other for the exhaust.Valve section acceleration function method is used to redesign the intake and exhaust cam and the valve timing,Calculation and analysis of kinematics and dynamics the new design of the cams show that the new design of double-cam valve train has good reliability.Experimental study is carried out for the effect of the double-cam on the engine′s power,economy and reliability.

关 键 词：配气机构 凸轮设计 分段函数 动力学分析 配气相位 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]