250ml排量卡丁车的改进设计

Improved design of a certaintype GO-Kart of 250 ml discharge

为解决目前最受市场欢迎的250 ml排量系列卡丁车"减振性能差、在崎岖路面高速行驶稳定性不佳"的问题,将高档轿车上用的双摆臂前轮悬架设计技术整合到这一排量的卡丁车中去,同时改变以往后轮单纯依靠橡胶轮胎减振的情况,后悬架采用整体桥式结构重新设计。在改进设计中开展了卡丁车前、后悬架减振器速度特性试验、等效刚度试验、悬架总体侧倾角刚度试验,提出了将计算机三维设计与试制、试验相结合的改进设计方法。对改进设计前后的减振器阻尼、悬架等效刚度及悬架总体侧倾刚度值的变化进行了评价,并完成了整车试制后的路面测试。试验结果表明,改进后的卡丁车大大提高了崎岖路面行驶的稳定性和平顺性。

In order to solve the problems of poor stability on rugged roads during high-speed driving,as well as poor damping performance of the most popular Kart（displacement： 250 ml）,the following areas were investigated： the double-arm front wheel suspension design of luxury sedans was integrated into the Kart.The past situation of relying solely on the rear wheel damping was changed.And the rear suspension was redesigned with the overall bridge structure.After the tests of the front and rear suspension damper rate,the equivalent stiffness,and the overall roll angle suspension stiffness,the method of combining computer three-dimensional design,trial-manufacture and tests was presented.The absorber＇s damping,suspension equivalent stiffness and overall roll angle suspension stiffness before and after design improvement were evaluated,and the finished trial-manufactured Kart was tested on the road.The experimental results show that the stability and smoothness of the Kart had been greatly enhanced when it is on rough roads.