Abstract
KEYWORDS –solenoid injector, electromagnetic force, fuel injector, Matlab-simulink, Maxwell.
ABSTRACT –The purpose of this study is to develop a fuel injector solenoid actuator using a modeling approach. Two mathematical models including electrical model and mechanical model are used to simulate operation of the solenoid injector. These models are combined and solved by Matlab-Simulink. Besides, the solenoid injector is also modeled and simulated in Maxwell and Simplorer. In order to provide information for this study, the effects of parameters such as input voltage (V0), number of turns (N), and mass of plunger (M) on the operating characteristics of the solenoid actuator are investigated. Beside, input current and gap between plugnut and plunger of the solenoid are changed to find out their effects on the electromagnetic force. The simulation results showed that the increase of input voltage is a method to reduce response time, while ensuring stable operation of the solenoid. The increase of coil turns only results in increasing of plunger displacement as well as electromagnetic force, while response time is not changed significantly. By changing mass of plunger from 8 g to 208 g with increment of 50 g, the electromagnetic force and displacement of plunger are almost same. However, the oscillation is occurred when the mass of plunger was at least 58 g. The solenoid injector should be operated with suitable input voltage and small mass of plunger to ensure correct and stable operation. The simulation results in Maxwell show that the input current and gap between plugnut and plunger of the solenoid affect significantly on the electromagnetic force. A successful combination between Maxwell and Simplorer is presented to simulate further linear motion of plunger in the solenoid injector as well as electromagnetic force applied on this plunger.