增程式电动汽车增程器多目标优化控制策略研究

Research on Multi-objective Optimization Control Strategy for Range Extender of Extended Range Electric Vehicle

针对增程式电动汽车增程器系统控制策略优化目标不全面的问题,对发动机的工作点进行设计,综合分析增程器系统的油耗特性、排放特性和振动噪声特性,探讨增程器系统的燃油经济性、排放性和NVH性能的多目标优化控制策略,并利用Cruise软件进行联合仿真,得出增程器系统的全局优化工况点。结果表明,提出的多目标优化控制策略可以提高增程式电动汽车在不同工况点的适应能力,同时能较好地兼顾增程器系统的排放特性和NVH性能。

In view of the problem that the optimization goal of the control strategy for the range extender system is not comprehensive,the operating point of the engine is researched and designed to comprehensively analyze the fuel consumption characteristic,emission characteristics and vibration and noise characteristics of the range extender system,the multi-objective optimization control strategy of fuel economy,emission and NVH performance for the range extender system is discussed,and the global optimal operating point of the range extender system is obtained by using the joint simulation with cruise software.The results show that the proposed multi-objective optimization control strategy can improve the adaptability of the extended range electric vehicle at different operating conditions,and at the same time take into account the emission characteristics and NVH performance of the range extender system.