On the other hand, the actual pre-torque screw can not be too large, that is, the actual pre-torque generated by the actual prestressing force can not have Great. 另一方面，螺纹的实际预紧扭矩又不能过大，也即由实际预紧扭矩产生的实际预紧力不能过大。
The results show that decreasing the driving voltage, primitive cavity, pre-tightness force of spring, and the mass of mobile elements can improve the performance of solenoid. 通过降低驱动电压，减小初始气隙，降低弹簧预紧力，减轻电磁阀运动部件的质量，均可以提高电磁阀的性能。
