液驱混合动力车辆的优化节能控制算法研究

提出了一种应用液压变压器搭建液驱混合动力车辆的设计结构,阐述了其工作原理.根据液压变压器的节能思想及其数学模型,对其排量及压力调节特性进行分析,得出系统处于能量回收态时,随液压变压器配流盘控制角规律变化的优化参数.此外,根据蓄能器能量回收最大化的优化条件,得出车辆处于不同调节状态时优化节能控制算法.仿真分析得出:车辆处于不同优化工况条件下,液压变压器与蓄能器各个变化参数与优化节能算法的控制关系,该优化节能算法可用于液混车辆实现能量回收最大化.

Research on Optimization Energy saving Control Algorithm of the Hydraulic Hybrid Vehicle

A new structure of hydraulic hybrid vehicle and the working principles were presented. The characteristics of Hydraulic Transformer (HT) displacement and pressure were analyzed after the mathematical models of HT displacement and pressure were established. Results showed that the various parameters of the HT port plate control angle from regular pattern were obtained when the energy regenerative system was working. Moreover, according to the optimal conditions of the accumulator, an optimization energy saving control algorithm with various operation conditions was established. Finally, the control relationships between optimization energy saving algorithm and various parameters of HT and accumulator were obtained through simulation tests when the HHV operated in different working conditions. So, the optimization energy saving algorithm can use HHV to achieve maximum energy recovery.