In order to simultaneously improve the opening and closing response speed of high speed solenoid valve for marine diesel engine electronic fuel injection system

a design scheme of double return spring was proposed. A numerical simulation model of single spring solenoid valve was established by means of numerical simulation method

and the accuracy of the simulation model was verified on the solenoid valve test bed

and a solenoid valve model of the double return spring was established on the basis of the model. The influences of three parameters on the dynamic response of solenoid valve were studied which are the pre-load and stiffness of low stiffness spring

the stiffness of high stiffness spring and the initial gap between the end face of high stiffness spring and armature. The results show that compared with single spring

the design of the double return spring can optimize the electromagnetic valve opening and closing response at the same time. In particular

when the preload of the low stiffness spring is 110N

the stiffness is 16N/mm

the stiffness of the high-rigidity spring is 100N/mm and the initial gap between the end face of the high-rigidity spring and the armature is 0.01mm. The solenoid valve opening response time is reduced by 1%

and the closing response time is reduced by 15.2%.