Simulation of the magnetic properties for common rail electro-injector

Abstract

After the great success of the application of the common rail system on the vehicles, it became very attractive to apply this new injection system on small engine, which has much industrial application.This work represents a comprehensive study on optimising the magnetic properties of the electro-injector used in off-road application. In this work analytical studies were implemented to simulate the solenoid actuator for the electro-injector, depend on the required quantities of the diesel oil. To reach our goal different models with different concepts were built-up to evaluate the best magnetic properties of the applied materials. Different types of steels were simulated, to achieve the better working force from the solenoid actuator. Different models were built-up by varying the material properties from one side and the working parameters such as the coil turn, current for a fixed gap between the armature and the back iron from the other side.Comprehensive structural modelling was carried out to secure and optimise the function ability of the electro-injector, in particular the interference fitting between different parts of this injector.The analytical study was carried out with the application of FEM using ANSYS 6.1 and Pro/Mech. programmes.As a result of this simulation, the magnetic characterization has been determined, by choosing the right steel for the best solenoid actuator application. The electro-injector parts were optimised. Finally, the experimental and analytical results both were in good agreement.