High-speed solenoid valve(HSV)is a key component of the electronic fuel injection system.Its armature eccentricities are important factors that affect the static and dynamic characteristics of HSV.In order to reveal the influence of the armature eccentricities of HSV on the electromagnetic force in all operating conditions,a method combined with the experiment and numerical simulation was employed.First,the finite element model of HSV was established and its accuracy was verified with the maximum error 4.8％by comparing with the tested electromag-netic force.Then,the influence of armature center offset and deflection and their interaction on the electromagnetic force of HSV was analyzed.The results show that the axial electromagnetic force decreases and the radial electro-magnetic force increases with the increase of the offset rate,but the overall effect on the electromagnetic force is not significant.With the increase of deflection angle,the axial electromagnetic force decreases approximately line-arly with the maximum reduction rate of 59.5％,while the radial electromagnetic force increases gradually with a very small pace.The interaction between the center offset and the center deflection of armature around the offset di-rection has a significant effect on the axial electromagnetic force.The correlation coefficient absolute values of the interaction factor on the axial electromagnetic force in all operating conditions are 0.471 at the minimum and 0.624 at the maximum.
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