液驱混合动力车辆动态特性研究

摘要

所研究的液驱混合动力车辆由液压泵、高压蓄能器、低压蓄能器、高速响应开关阀和控制系统等组成。建立了液驱混合动力系统及液压泵／马达伺服排量控制系统的数学建模，提出了控制策略，并对车辆的动态特性进行了仿真分析及试验研究。试验结果验证了液驱混合动力车辆仿真模型的有效性及控制策略的合理性。%The studied hydraulic hybrid vehicle was composed of the hydraulic pump,high-pressure accumulator,low-pressure accumulator,switch valve and control system. The mathematical model of the hydraulic hybrid power system and the mathematical model of the displacement servo system of hydraulic pump/motor were built. The control strategy for hydraulic hybrid vehicle was pro-posed. The simulation and experiment to the dynamic characteristics of the hydraulic hybrid vehicle were finished. The experimental re-sults prove that the simulation model is effective and the control strategy is reasonable.