摘要
为提高车辆对动态驾驶环境的适应性,针对纯电动物流车三挡变速系统,提出了一种充分考虑道路坡度与车辆载重,同时兼顾车辆动力性与经济性的综合性能换挡规律。分析道路坡度与车辆载重对车辆行驶阻力矩的影响,制定了具有动态适应性的动力性换挡规律与经济性换挡规律。以0~50 km/h的加速时间与加速过程能耗为目标,建立了综合性能换挡规律优化模型,并通过分层引力搜索算法求解,得到不同道路坡度与车辆载重驾驶条件下的综合性能换挡规律。最后,使用MATLAB/SIMULINK仿真平台对3种换挡规律进行对比分析,仿真结果表明,综合性能换挡规律在CHTC-LT驾驶循环工况下比能耗接近于经济性换挡规律,且具有良好的动力性能;同时在不同道路坡度与车辆载重驾驶条件下能消除换挡循环现象,表现出优越的动态适应性。
In order to improve the adaptability of the PELV to the dynamic driving conditions,a comprehensive gear shift schedule for three-speed powertrain was proposed with the consideration of road gradient and vehicle loads,as well as dynamic and economic performance of the vehicles.The influences of road gradients and vehicle loads on vehicle’s moment of resistance were analyzed.The dynamic and economic shift schedule with dynamic adaptability were established.Then an optimization model of comprehensive shift schedule under different driving conditions was formulated to take the minimum acceleration time of 0~50km/h and minimum energy consumption as optimization objectives,which was solved via a hierarchical gravitational search algorithm.With the proposed optimization model and algorithm,the comprehensive gear shift schedule was obtained.Finally,MATLAB/Simulink simulation platform was used for comparative analysis of three shift schedule.The results show that the energy consumption per kilometer of comprehensive gear shift schedule is close to economic shift schedule under CHTC-LT driving cycle and has better dynamic performance.Moreover,the comprehensive gear shift schedule eliminates the shifting cycle under different road gradients and vehicle loads,which shows great adaptability to driving conditions.
作者
李聪波
张弛
屈世阳
胡曾明
LI Congbo;ZHANG Chi;QU Shiyang;HU Zengming(State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, 400030)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2021年第3期275-283,289,共10页
China Mechanical Engineering
基金
国家自然科学基金(51975075)
重庆市技术创新与应用发展专项面上项目(cstc2020jscx-msxmX0202)。
关键词
道路坡度
车辆载重
纯电动物流车
三挡变速系统
综合性能换挡规律
road gradient
vehicle load
pure electric logistic vehicle(PELV)
three-speed powertrain
comprehensive gear shift schedule
