【摘要】 针对液压式配气系统气门落座特性的问题,文章建立液压驱动式气门的回落过程的数学模型,利用AMESim搭建系统模型,对影响液压式驱动气门落座特性的关键参数进行进一步的研究,结合ANSYS软件针对气门在不同速度下落座应力特性进行了研究。结果表明:随发动机速度的增加,气门落座时的速度也会增大,在高速(6000r/min)时气门落座后还会出现反跳现象;圆锥环形缝隙缓冲不仅可以降低落座速度,而且会影响气门运动时速度的波动;气门质量对气门落座产生的影响较小;较大速度的落座容易在气门轴颈处产生应力集中现象,不利于气门的落座。更多还原

【Abstract】 In order to solve the problem of hydraulic valve gas system valve seating characteristics. In this paper,a model of hydraulic drive valve down process of mathematical model,using AMESim to build system model,influence on hydraulic drive the key parameters of the valve seating properties for further research,and with the aid of ANSYS software in view of the valve in different speed of the whereabouts of the stress characteristics were studied. The results show that with the increase of engine speed,valve seating speed will also increase,the in high speed(6000 r/min)valve seating will appear rebound phenomenon;conical annular gap buffer can not only reduce the seating velocity,and will affect the movement of valve,the speed fluctuation;less effect on quality of valve of the valve seat;velocity is larger seated easily in the valve shaft neck produced greater stress concentration phenomenon,is not conducive to the valve seat.更多还原