【摘要】 以气门弹簧的尺寸参数、最小装配预压缩力和配气机构不脱离为约束条件 ,以配气机构中各零件之间的接触力峰值最小作为气门弹簧优化设计的目标 ,对采用铝合金陶瓷镶块摇臂的配气机构的气门弹簧进行了优化设计。与原配气机构相比 ,采用陶瓷摇臂和新的气门弹簧后 ,凸轮与摇臂、气门螺钉与气门的最大接触力以及气门落座冲击力均显著降低 ,对提高配气机构的工作可靠性有利更多还原

【Abstract】 Taking dimensional parameters,maximum precompression force of assembly and non-disconnection of distribution mechanism as restricted conditions,taking the maximum peak value of contact forces between parts of distribution mechanism as the target of optimum design of valve spring,the valve spring of distribution mechanism for aluminium-alloy ceramic rocker arm is designed optimally.Compared with the existing distribution mechanism,by using ceramic rocker arm and new valve spring,maximum contact forces between cam and rocker arm,valve screw and valve and downward impact force of valve are obviously reduced to benefit the working reliability of distribution mechanism.更多还原