伴随发动机起动的混合动力模式切换控制

doi:10.19562/j.chinasae.qcgc.2019.012.002

摘要/Abstract

摘要： 插电式混合动力客车有两种动力源,不同动力源之间切换会导致纵向冲击,影响车辆的动力性和舒适性。以同轴并联混合动力客车为研究对象,分析了其从纯电动模式向混合驱动模式的动态切换过程,基于状态空间理论将模式转换过程划分为4个子状态,设计了动态协调控制策略。以整车运行纵向冲击度和模式切换时间为评价指标,通过台架实验对所提出的动态协调控制策略进行验证,并与传统的电机转矩补偿策略进行对比,实验结果表明,所设计的控制策略有效抑制了转速波动,缩短了模式切换时间,减小了整车纵向冲击度,改善了驾驶性能。

关键词: 同轴并联混合动力系统, 模式切换, 动态耦合, 转矩协调控制

Abstract: Plug-in hybrid electric buses have two kinds of power sources. Switching between different power sources will lead to longitudinal impact, which will affect the power and comfort of the vehicle. Taking the coaxial parallel hybrid bus as the research object, the dynamic switching process from pure electric mode to hybrid drive mode is analyzed. Based on state space theory, the mode conversion process is divided into four sub-states, and the dynamic coordinated control strategy is designed. Taking the longitudinal impact and mode switching time of vehicle running as evaluation indexes, the proposed dynamic coordinated control strategy is verified by bench test and is compared with the traditional motor torque compensation strategy. The results show that the designed control strategy can effectively suppress the speed fluctuation, shorten the mode switching time, reduce the longitudinal impact, and improve the driving performance.

Key words: coaxial parallel hybrid system, mode transition, dynamic coupling, torque coordinated control

杨业, 张幽彤, 单小明. 伴随发动机起动的混合动力模式切换控制[J]. 汽车工程, 2019, 41(12): 1356-1364.

Yang Ye, Zhang Youtong, Shan Xiaoming. Research on Hybrid Mode Transition Control with Engine Start[J]. Automotive Engineering, 2019, 41(12): 1356-1364.

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