基于工况分析的混合动力系统设计

通过对上海典型城市工况循环的构建与分析得到了目标车型的基本行驶参数,并分析了加减速过程中整车能量消耗、功率消耗的分布情况。对该车混合动力系统控制策略进行了优化,并在ECE+EUDC联合工况下分别以混合动力模式和传统车模式进行了仿真对比。结果表明,以混合动力模式运行时,整车能够及时跟踪期望车速,并且能按预期目标实现发动机托动、怠速停机、加速助力和制动能量回收功能;该动力系统方案下混合动力运行模式比传统运行模式燃油经济性提高12%以上。

Hybrid System Design Based on Driving Cycle Analysis

By constructing Shanghai typical urban drive cycle and analysis,the basic driving parameters of the target model are obtained,and distribution of vehicle energy consumption and power consumption during acceleration and deceleration are analyzed.Control strategy of the hybrid system is optimized,and simulation of hybrid system and tradition power mode is made and compared in ECE+EUDC cycles.The results show that when the vehicle operates in hybrid mode,the vehicle can track expected vehicle speed,and achieve functions like engine start,idle stop,acceleration and brake energy recovery,etc..With this power solution,the hybrid system will operate with fuel economy improvement over 12% compared with traditional operating mode.