Abstract
This study focuses on exploring the characteristics of the electromechanical coupling transmission electro-hydraulic control system of plug-in hybrid electric vehicles, and proposes corresponding optimization measures to improve the performance and economy of the vehicle, and reduce the impact on the environment. Firstly, we analyze the working mode of plug-in hybrid vehicles; then design the structure of electromechanical coupling with variable speed and the main components of the electro-hydraulic control system, including flow control system, cooling lubrication circuit, brake and shift control circuit, hydraulic valve and spring. Finally, we applied AMESim simulation software to analyze the response characteristics of each hydraulic valve and optimized the relevant parameters of the valve based on the simulation results. By establishing a dynamic simulation model for the electro-hydraulic control system, in-depth analysis is conducted on the pressure and flow response characteristics of the clutch under slope and step signal control.
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