基于动态充油过程联合仿真的液力缓速器控制系统优化

为达到车辆制动过程中液力缓速器快速响应的要求,通过在液力缓速器控制阀中增加分流结构与调整出口节流阀控制信号两种方式对液力缓速器控制系统进行了优化.为验证优化后控制系统的性能,通过对电液比例先导阀、液力缓速器及优化前后的液力缓速器控制阀联合仿真,得到优化前后液力缓速器进出口流量、充液时间及变速箱润滑系统进口流量等结果.通过对比分析发现优化后的液力缓速器响应快速.并且优化后的控制系统在整个循环过程中具有增大分流区间流量的作用,而对其他区间流量的变化趋势没有影响. 结果表明这种控制方法可以用于液力缓速器,同时也可以用于其他充液元件来减少响应时间. 

Optimization of the Hydraulic Retarder Control System Based on Joint Simulation of Dynamic Liquid-Filled Process

In order to reach the rapid response requirement of the hydraulic retarder during vehicle braking process, the optimization of the hydraulic retarder control system was realized through two ways,increasing shunt structure in the hydraulic retarder control valve and adjusting the control signal of outlet throttle valve. To verify the performance of the optimized control system, the electro-hydraulic proportional pilot valve, the hydraulic retarder and the hydraulic retarder control valve before and after optimization were simulated jointly. The results about the inlet and outlet flow rate, the liquid-filled time of the hydraulic retarder, the inlet and outlet flow rate of the lubricant device of the gearbox, were acquired. The contrast analysis results show that, the response speed of the optimized hydraulic retarder is more rapid than that before optimization. And the optimized control system can increase the flow rate of shunt section and has no effect on the change trend of flow rate in other sections throughout the process cycle. The control method is suitable for the hydraulic retarder and it can also be used for other liquid components to reduce the response time.