增程式电动汽车发动机开关时刻的优化控制

摘要

The controlling strategy is an important aspect to judge the good or bad of extended-range electric vehicle's performance.For an extended-range electric vehicle,the common fixed-point energy management strategy of extended-range electric vehicle was reviewed detailedly.The parameter of the key component of extended-range electric vehicle was matched.According to driving cycles NEDC,simulation was conducted to optimize the on and off timing of the engine of the extendedrange electric vehicle with the target range as constraint.The simulation results indicate that optimizing the on and off time of engine can effectively shorten the running time of engine,being conducive to the reduction in fuel consumption and exhaust emission and improve the fuel economy.%控制策略是判断增程式电动汽车性能好坏的的重要方面.针对一款增程式电动汽车,文章较详细地分析了增程式电动汽车常用的定点能量管理策略,并对增程式电动汽车动力系统中的关键部件进行了参数匹配.根据循环工况NEDC,以目标行程为约束条件,对增程式电动汽车发动机的开/关时刻进行仿真优化.仿真结果表明,通过对发动机开关时刻的优化,可以明显减少发动机的运行时间,有利于降低燃油的消耗和废气的排放,提高燃油的经济性.