Design And Optimization Of Electromagnetic Valve With Seating Buffer

The electromagnetic valve seat buffer can effectively improve the engine’s power and fuel economy,however,the existing structural integration layout cannot meet the problem of limited space for actual installation,and the traditional modeling method cannot completely show the complex coupling structural characteristics of the electromagnetic valve seat buffer.In this paper,the design of the integrated layout and optimization of the magnetorheological buffer structure are carried out from the aspects of finite element modeling,co-simulation,structural integration layout and performance index optimization,taking the electromagnetic valve seat buffer as the research object.The research of the paper is carried out in the following aspects:(1)The existing multi-physics field finite element model of the electromagnetic valve seat buffer was established,and the finite element simulation under static and dynamic conditions was carried out with the actual working condition as reference,laying the foundation for the establishment of the co-simulation platform.(2)Based on the multi-physics model of the EMLA and the MR buffer,a co-simulation platform of the electromagnetic valve seat buffer was built through the real-time data transfer channel between COMSOL and MATLAB/Simulink.Based on the existing prototype,a test bench was built to complete the test of the valve seating and verify the accuracy and effectiveness of the co-simulation platform.(3)The optimization scheme of the MR buffer with the maximum value of the adjustable coefficient of damping force as the optimization objective is proposed.Firstly,the structural form of the internal flow channel of the MR buffer is optimized with the volume of the structural integrated layout as the target.Then the materials of the MR buffer are reselected,and finally the optimization target,optimization variables and constraints of the buffer are determined,and the optimization of the structural dimensions of the buffer is completed based on the NelderMead algorithm.(4)Based on the optimized MR buffer,a multi-physics model and a co-simulation model of the MR buffer were established.The performance analysis of the buffer was carried out by the multi-physics model,and the co-simulation verified the performance of the system in terms of valve seating,and the effectiveness of the MR buffer optimization was verified.