摘要
为了动态地反映工程车辆的换挡过程,提高其动力性并减少换挡冲击,通过对车辆传动系统的动态建模分析,提出了动态四参数(车速、加速度、油门开度、工作泵压力)的工程车辆换挡策略,推导出了工作油泵压力、道路坡度与车辆加速度的关系.根据换挡前后车辆加速度相等,应用解析法求解出最佳换挡车速点,从而制定了动力换挡策略.试验表明,最佳换挡点随工作油泵压力和道路坡度角的增大而减小,该换挡规律能够反映车辆换挡的动态过程,掌握该规律可以更加准确地求出最佳换挡点,使换挡冲击度为0,从而进一步提高工程车辆的动力性.
To express dynamically the shift process of construction vehicle and improve its power performance and reduce shifting impact degree, a dynamic shift schedule with four-parameter was presented, where parameters were vehicle speed, vehicle acceleration, throttle opening and pressure of working oil pump respectively. The mathematical relation between the pressure of working pump, road slope and acceleration were derived, and then the best shift points were solved by analytical method. The experimental results show that the acceleration decreases as the pressure of working oil pump or the road slope increases, and shifting impact degree is zero, and the dynamic shift schedule with four-parameter is superior to the static shift schedule in both dynamic performance, fuel economy and shift quality.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2008年第9期1189-1192,共4页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目(59705005)
教育部高等学校博士点专项科研基金资助项目(20020183003)
关键词
工程车辆
自动换挡
动态
四参数
construction vehicle
automatic shift
dynamic
four-parameter
