Abstract: Aiming at the problem of pressure fluctuations in the direct drive solenoid valve of the hydraulic control system during the development of the transmission. In this paper, AMEsim software was used to build the simulation model of solenoid valve, and four kinds of damping system simulation models were established for simulation analysis. The influence of different damping on the outlet pressure of solenoid valve was studied, and the damping system model with the best pressure stability was obtained, which has been verified by experiments. The results show that the method of increasing the damping of the direct drive solenoid valve outlet can effectively improve the stability of the solenoid valve outlet pressure. Among the four damping system models, the four orifice model has the best pressure stability. This method can solve the problem of pressure fluctuations quickly and at a lower cost, and provides a new idea for solving the problem of pressure fluctuations.

Key words: Transmission; Hydraulic control system; Pressure fluctuation; Solenoid valve; Damping system; Four orifice model; Pressure stability

摘要： 针对在变速器开发过程中出现液控系统直驱电磁阀压力波动的问题，论文采用 AMEsim 软件搭建了电磁阀仿真模型，建立了 4 种阻尼系统仿真模型进行仿真分析，研究了不同的阻 尼对电磁阀出口压力的影响，获得了具有最佳压力稳定性的阻尼系统模型，并通过试验进行 了验证。结果表明，直驱电磁阀出口增加阻尼的方法能有效地提高电磁阀出口压力的稳定性， 4 种阻尼系统模型中，四阻尼孔模型具有最佳的压力稳定性，能较快且较低成本地解决压力 波动的问题，该方法对压力波动问题的解决提供了新思路。

关键词: 变速器；液控系统；压力波动；电磁阀；阻尼系统；四阻尼孔模型；压力稳定性