电动商用车的串联制动控制策略

Series braking control strategy of electric commercial vehicle

【目的】为了提高电动商用车复合制动系统的能量回收率、改善制动感觉.【方法】依据ECE法规、电机、蓄电池和制动感觉等约束条件的限制,结合电动商用车电-气复合制动系统的特点,提出了一种最佳感觉的串联制动控制策略,根据制动强度和I曲线分配电机和气压制动力,并在Cruise与Matlab联合仿真环境下建立制动控制策略模型,通过60km/h初速一次制动工况和NEDC循环工况验证串联制动控制策略的性能.【结果】在具有最佳制动感觉的同时,z=0.1和z=0.5一次制动工况下制动能量回收率分别达到了19.43%和17.39%,NEDC工况下能量回收率达到了18.56%.【结论】电动商用车串联制动控制策略能够在保证最佳制动感觉的前提下大大地提高制动能量回收率,是一种提升电动汽车制动性能和整车经济性的有效方法.

【Objective】In order to improve energy recovery and brake feeling of composite braking system for electric commercial vehicle.【Method】A series braking control strategy with optimal braking feeling was proposed according to the constraints of ECE regulations limit,motors,batteries and braking feeling,combining the characteristics of electric-pneumatic composite braking system for electric vehicle.The braking force was distributed between motor braking and pneumatic braking according the braking intensity and I curve.The control strategy model was established under Cruise and Matlab co-simulation environment.The single braking condition with initial velocity of 60km/h and NEDC driving cycle was used to verify the performance of the series braking control strategy.【Result】The optimum brake feeling can be ensued,meanwhile the energy recovery rate for single braking was up to 19.43% and 17.39%respectively when z was 0.1and 0.5,and the energy recovery rate for NEDC was up to 18.56%.【Conclusion】The series braking control strategy can significantly improve the braking energy recovery under ensuring the best braking feeling and be acted as an effective method to improve the braking performance and economical benefit of electric vehicle.