The throttle valve is the important flow control component of LUDV hydraulic systems. Its performance, good or bad, directly effect the energy saving and stability of LUDV system. Aimming at this problem, the structure and function of throttle valve in LUDV multi-way valve were analyzed, throttle valve simulation model in AMESim was established,and through changing the throttle valve' s parameters such as spring preload force etc. , the simulation was done. The analysis results of simulation indicate that, the response of LS pressure has some connections with the setting flow of the throttle; flow sets too big, LS pressure responds slowly, not necessarily LS pressure establishes enough; flow sets too small, LS pressure responds fast and causes the system's pressure shocking, and easily form LS pressure build-up.%LUDV多路阀中LS油路的节流阀是LUDV液压系统的重要流量控制元件,其性能的好坏直接影响LUDV系统的节能性和稳定性.针对这些问题,分析了LUDV多路阀中节流阀的结构和功能,并在AMESim环境下建立了节流阀的仿真模型,通过改变节流阀的节流孔和弹簧预紧力等参数值进行了仿真.仿真分析结果表明:节流阀的定流量值设计为多少,与LS油路压力的响应有关；流量设定太大,LS压力响应慢,LS油路未必能建立起足够的压力；流量设定太小,响应太快导致系统压力冲击,且易形成LS油路憋压.
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