面向高速工况的混合动力卡车预见性节能算法  

Predictive energy saving algorithm for hybrid electric truck under high-speed condition

作　　者：王玉海[1] 李晓之 李兴坤[2] WANG Yu-hai;LI Xiao-zhi;LI Xing-kun(State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun 130022,China;State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084,China)

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130022 [2]清华大学汽车安全与节能国家重点实验室,北京100084

出　　处：《吉林大学学报（工学版）》2024年第8期2121-2129,共9页Journal of Jilin University:Engineering and Technology Edition

基　　金：山东省重大科技创新工程项目(2019JZZY010911).

摘　　要：重型卡车长途货物运输过程中,车辆主要行驶工况为车速小范围波动的高速巡航工况。为进一步提升车辆在该工况下的节油率,以P2构型单轴并联式混合动力卡车为研究对象,提出了以发动机燃油消耗量最小为目标的预见性节能算法。基于车辆前方道路坡度变化,考虑车速变化与动力部件能量分配对车辆油耗的影响,将车速与电池SOC作为系统状态变量,用动态规划算法确定针对当前行驶道路的全局最优未来车速轨迹及能量分配规则。经对比验证,本文算法得出的车速规划及能量分配结果合理,且采用预见性节能算法的混动卡车相较定速巡航(CCS)下采用动态规划算法的混动卡车及预见性巡航控制(PCC)下的纯燃油卡车节油率分别为3.19%和6.26%。In the process of long-distance cargo transportation of heavy truck,the main driving condition of the vehicle is the high-speed cruising condition with little change in speed range.In order to further improve the fuel saving rate of the vehicle under this condition,a predictive energy saving algorithm with the objective of minimizing engine fuel consumption is proposed,which takes the P2 configuration single-axle parallel hybrid truck as the research object.Based on the change of road slope in front of the vehicle,considering the influence of speed change and energy distribution on fuel consumption,the vehicle speed and battery SOC are regarded as system state variables,and the global optimal future vehicle speed trajectory and energy distribution rules for the current road are determined by dynamic programming algorithm.It has been verified that the speed planning and energy distribution results obtained by the predictive energy saving algorithm are reasonable,and the fuel saving rates of hybrid truck with predictive energy saving algorithm are 3.19% and 6.26%,respectively compared with hybrid truck using dynamic programming algorithm under cruise control system(CCS)and pure fuel truck under predictive cruise control(PCC).

关 键 词：车辆工程 混合动力卡车 预见性节能算法 车速规划 能量管理策略 

分 类 号：U461.8[机械工程—车辆工程]