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

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