Characteristics analysis of a high-pressure relief valve for the common rail system

This paper deals with the static and the dynamic characteristics of the proportional solenoid operated high pressure relief valve for a common rail system of the diesel engine. In order to get a high attraction force from the small size solenoid actuator, the plunger structure must be made to plate type not cylindrical one. In this study, the technique of an equivalent magnetic circuit analysis is proposed for confirming the validity of the theoretical analysis. The proposed plate type proportional solenoid actuator consists of a core and a plate plunger for getting the high attraction force is also studied. The static and the dynamic characteristics of the proposed solenoid actuator are accomplished using the Maxwell software. Finally a prototype solenoid actuator is manufactured using the theoretical analysis results data and experimented by experimental equipment.