Hold current effects on the power losses of high-speed solenoid valve for common-rail injector

Abstract In the present investigation, a simulation of the dynamic response of a high-speed solenoid valve (HSV) has been performed. The influences of hold current I on the dynamic characteristics and power losses of a HSV have been investigated through the finite-element methods (FEM). The simulation results show that as the driving current I decreases, the opening response characteristics of a HSV deteriorate, the proportion of different power losses decrease in different levels, the energy utilization efficiency of a HSV increases. In the energy distribution of a HSV, core loss accounts for the highest proportion, followed by solid loss and copper loss. Useless energy is mostly due to core loss. It can be concluded that there is a possibility of achieving an optimal balance between the opening response time and energy distribution of a HSV when choosing hold current I properly.