轮边驱动液压混合动力车辆能量回收系统性能研究

合理配置系统各主要参数，是影响混合动力车辆制动性能及节能效果的关键问题。以轮边驱动液压混合动力车辆为原型，分析了轮边驱动液压混合动力车辆能量回收系统的工作原理，以原型车的1/4为基础，对辅助动力元件（蓄能器）、二次元件（液压泵/马达）的参数进行了理论分析；建立了能量回收系统的AMESim仿真模型，进行仿真分析；搭建了试验台架，开展试验验证。结果表明：在满足制动性能要求的前提下，增大蓄能器容积以及降低蓄能器最小工作压力有利于回收制动能量；二次元件的排量对制动性能的影响比较大，对制动能量的回收率影响很小；蓄能器工作压力越低，能量密度越大。

Research on Energy Recovery System of Wheel Drive Hydraulic Hybrid Vehicle

 Reasonable allocation of the main parameters of the system is the key problem affects the braking performance and energy saving effect of hybrid vehicles .The working principle of the energy recovery system of the wheel drive hydraulic hybrid vehicle is analyzed by using the wheel drive hydraulic hybrid vehicle as the prototype. Based on 1/4 of the prototype vehicle, The parameters of auxiliary power element (accumulator) and secondary element (hydraulic pump/motor) are analyzed theoretically. The AMESim simulation model of energy recovery system is established, and the simulation analysis is carried out. The test bench is set up, and the test verification is carried out. The results show that: under the premise of satisfying the braking performance requirement, Increasing the volume of accumulator and reducing the minimum working pressure of accumulator are beneficial to the recovery of braking energy. The displacement of hydraulic pump/motor has a great influence on braking performance and little effect on the recovery rate of braking energy, The lower the working pressure of the accumulator, the greater the energy density.