【摘要】 为了解决AMT车辆降档过程冲击大以及速比差大的换档成功率低等问题,综合考虑了AMT车辆的换档规律和换档品质,提出了一种新的降档规律获取方法。以最佳动力性或经济性升档规律为基础,将反映车辆换档品质的冲击度控制在17.64 m.s-3以内,结合2~8 km.h-1的降档延迟值确定降档规律。以特种越野车辆为原型,以最佳动力性换档规律为例,对该换档规律和熟练驾驶员手动换档时车辆的加速度和速度进行了仿真比较。分析结果表明:该降档规律在保证换档品质的情况下使加速度平均提高了18.7%,速度平均提高了22.2%,车辆的动力性能得到明显改善。更多还原

【Abstract】 In order to solve some problems existed in AMT vehicle,such as big shift impact and low shift success rate between gears which have large transmission ratio difference,shift schedule and shift quality were synthetically considered,and a new establishing method of down shift schedule was put forward.Down shift schedule was obtained based on the optimal power or fuel-economy up shift schedule when the impact value was controlled under 17.64 m·s-3 and down shift delay is in 2～8 km·h-1.An optimal power down shift schedule was developed for special off-road vehicle with the method,and the performance of AMT vehicle was compared with that of MT vehicle controlled by skilled driver.Analysis result indicates that the average acceleration of the former increases by 18.7%,the average velocity increases by 22.2%,so the power performance of the vehicle was improved obviously.1 tab,3 figs,11 refs.更多还原