液压蓄能式车辆制动能量回收系统的AMESim仿真研究

Simulation Study of Hydraulic Regenerative Braking Energy System of Vehicles by AMESim

建立车辆液压蓄能式制动能量回收装置的AMESim仿真模型,对其工作过程中的能量损耗情况和制动性能的影响因素进行仿真研究。仿真结果表明:能量回收制动过程中,由于车辆行驶阻力造成的损失占车辆总动能的16%,是能量损失的主要方面;提高能量回收效率的办法是提高蓄能器预充气压力或减小蓄能器体积;改变液压泵/马达排量对提高能量回收效率的影响不大,但可显著影响车辆的起动和制动时间。

The simulation model of hydraulic recovery braking energy system was built using AMESim. The energy loss and the factors affecting the braking performance were simulated. The simulation results show that in the braking process, energy loss made by vehicle resistance accounts for 16% of the total vehicle kinetic energy which is the main aspect of energy loss; the method to improve the efficiency of energy recovery is to increase the accumulator pre-charge pressure or to decrease the volume of accumulator; there is little influence on the energy recovery efficiency when changing the hydraulic pump/motor displacement, but it has a significant impact on the vehicle＇s starting and braking time.