This paper investigates the impact of structural modifications in solenoid valves on the electromagnetic force characteristics crucial for efficient Variable Valve Timing (VVT) system operation. Utilizing finite element analysis, various hole and slot configurations within solenoid valve components were examined to determine their effect on the electromagnetic forces generated during valve operation. The study focused on base and spool structural parameters, such as the diameter and number of oil drain holes, the size and position of steel ball slots, and variations in structural dimensions. Results from empirical and simulation data reveal significant findings: larger diameters and an increased number of holes tend to reduce electromagnetic forces, while specific configurations can stabilize or enhance these forces. These findings offer critical insights for optimizing solenoid valve designs in VVT systems with the aim of improving performance and reliability. The study establishes a robust theoretical foundation for further empirical research on the multifactorial effects of valve structure on solenoid performance, paving the way for more refined VVT system designs in the automotive industry.