针对纯电动商用车在连续制动时,气源压力偏低会导致驱动轴耦合制动力响应速度变慢,影响制动能量回收效率的问题,提出一种基于比例继动阀的解耦式制动能量回收系统(uncoupled braking energy recovery system,URBS)方案。首先,基于比例...针对纯电动商用车在连续制动时,气源压力偏低会导致驱动轴耦合制动力响应速度变慢,影响制动能量回收效率的问题,提出一种基于比例继动阀的解耦式制动能量回收系统(uncoupled braking energy recovery system,URBS)方案。首先,基于比例继动阀的迟滞特性,采用前馈-单神经元PID控制方法,实现制动气压的准确输出;其次,以电池SOC、车速等为约束条件,根据气源压力信号确定供压模式,并制定解耦式制动能量回收控制策略;最后,基于AMESim,MATLAB/Simulink及TruckSim搭建联合仿真平台,选取单次制动工况与循环工况验证了制动力耦合效果及系统的制动能量回收效果。结果表明,基于比例继动阀的URBS可实现耦合制动力的快速响应,达到稳态压力值75%的时间小于0.1 s,且在中国重型商用车行驶工况和中国重型商用车瞬态工况下有效制动能量回收率分别为10.13%,17.17%。所提URBS方案能有效提高驱动轴耦合制动力的响应速度及耦合精度,可为纯电动商用车气压式URBS方案设计提供参考。展开更多
为了提高纯电动汽车的制动能量回收效率,本文对汽车制动动力学,制动能量回收的基本结构和原理进行了分析,提出了一种纯电动汽车制动能量回收控制策略,该策略综合考虑了影响纯电动汽车制动能量回收的因素,包括前,后轴制动力分配,ECE法规...为了提高纯电动汽车的制动能量回收效率,本文对汽车制动动力学,制动能量回收的基本结构和原理进行了分析,提出了一种纯电动汽车制动能量回收控制策略,该策略综合考虑了影响纯电动汽车制动能量回收的因素,包括前,后轴制动力分配,ECE法规,车速,电机扭矩,电池SOC值等。然后分别利用AVL-Cruise,MATLAB/Simulink搭建了控制策略模型和整车模型,并进行了联合仿真。仿真结果显示,在该策略运行NEDC工况下,制动能量回收率达到了10.8%,因此,该策略能够有效提升制动能量回收效率,增加纯电动汽车的续驶里程。In order to provide the braking energy recovery efficiency of pure electric vehicles, this paper analyzes the basic structure and principle of automobile braking dynamics and braking energy recovery, and proposes a brake energy recovery control strategy for pure electric vehicles, which comprehensively considers the factors affecting the braking energy recovery of pure electric vehicles, including front and rear axle braking force distribution, ECE regulations, speed, motor torque, battery SOC value, etc. The simulation results show that the braking energy recovery rate reaches 10.8% under the NEDC working condition of the strategy, so the strategy can effectively improve the braking energy recovery efficiency and increase the driving range of pure electric vehicles.展开更多
文摘为了提高纯电动汽车的制动能量回收效率,本文对汽车制动动力学,制动能量回收的基本结构和原理进行了分析,提出了一种纯电动汽车制动能量回收控制策略,该策略综合考虑了影响纯电动汽车制动能量回收的因素,包括前,后轴制动力分配,ECE法规,车速,电机扭矩,电池SOC值等。然后分别利用AVL-Cruise,MATLAB/Simulink搭建了控制策略模型和整车模型,并进行了联合仿真。仿真结果显示,在该策略运行NEDC工况下,制动能量回收率达到了10.8%,因此,该策略能够有效提升制动能量回收效率,增加纯电动汽车的续驶里程。In order to provide the braking energy recovery efficiency of pure electric vehicles, this paper analyzes the basic structure and principle of automobile braking dynamics and braking energy recovery, and proposes a brake energy recovery control strategy for pure electric vehicles, which comprehensively considers the factors affecting the braking energy recovery of pure electric vehicles, including front and rear axle braking force distribution, ECE regulations, speed, motor torque, battery SOC value, etc. The simulation results show that the braking energy recovery rate reaches 10.8% under the NEDC working condition of the strategy, so the strategy can effectively improve the braking energy recovery efficiency and increase the driving range of pure electric vehicles.