Simulation Study On Performance Of New Series Parallel Permanent Magnet High-speed Solenoid Valve In High Voltage Common Rail System

High-speed solenoid valve is the key control component of the high-pressure common rail system,and its performance directly affects the characteristics of the high-pressure common rail diesel fuel injection system.However,the traditional high-speed solenoid valve has technical problems such as the contradiction between driving force and limited design space,the contradiction between low power consumption and driving force,and the contradiction between high response speed and low power consumption,which limits the improvement of diesel engine performance.In this paper,a new type of high-speed solenoid valve with seriesparallel permanent magnet and electromagnetic hybrid excitation is taken as the research object,and its static and dynamic characteristics are deeply studied.The main research contents of this paper are as follows:(1)Establishing the numerical simulation model of the new high-speed solenoid valve:The static model of the new high-speed solenoid valve is established in the ANSYS Maxwell environment,and the dynamic multi-physics coupling model of the new high-speed solenoid valve is created in conjunction with ANSYS Simplorer.The established new high-speed solenoid valve model is indirectly calibrated and verified.It is found that the maximum error of static model is 6%,and that of dynamic model is 4.8%.(2)Research on the static characteristics of the new high-speed solenoid valve:First,the full working condition plane of the new high-speed solenoid valve was established,the effects of series and parallel permanent magnets and electromagnetics on the electromagnetic force of the new high-speed solenoid valve were carried out,and the series and parallel permanent magnets were revealed.The influence law of the number of coil turns on the electromagnetic force;then the correlation analysis of the electromagnetic force was carried out,and it was found that the height of the series permanent magnet ring,the height of the parallel permanent magnet ring and the number of coil turns had an interaction effect;then combined with the experimental design method,the electromagnetic force was established.force response surface model,and obtained the optimal response surface construction scheme through comparative analysis.Finally,the response surface model was constructed to analyze the interaction of the three factors on the electromagnetic force,revealing the interaction mechanism between the interaction factors and their influence on the electromagnetic force(3)Research on the dynamic characteristics of the new high-speed solenoid valve:Using the dynamic multi-physics coupling model of the new high-speed solenoid valve,the transient characteristics of the hybrid excitation magnetic field are studied,and the dynamic flux changes with time.The influence of five parameters such as magnetic ring height,driving voltage,spring preload,and residual air gap on the dynamic response of the new high-speed solenoid valve,and then study the correlation between the five parameters and the dynamic response time,and determine the parameters for the new high-speed solenoid valve.The influence relationship of valve dynamic response time.Finally,the influence of the interaction of key parameters on the dynamic response time is analyzed.