一种新型发动机电磁气门驱动结构及其磁场有限元分析

A New Structure of Electromagnetic Valve Actuation for Engine and Finite Element Analysis of Its Magnetic Field

提出一种新型发动机电磁气门驱动(EVA)结构,并应用有限元法计算其磁场分布,利用虚位移法计算其电磁力。该EVA结构紧凑,体积小,动力性能好,利用空气作阻尼克服使用弹簧易受温度影响和尺寸大的缺点,电磁力能够满足电磁气门驱动的动力性能需求。

A new electromagnetic structure is introduced in researching the electromagnetic valve actuation（EVA） for engine,which uses air as damp and has compact volume.The magnetic field of EVA has been calculated accurately by finite element method,the electromagnetic energy of different gap can be got and the electromagnetic force can be calculated by virtual displacement method.Calculated results show that the electromagnetic force of this new structure can meet the dynamic requirements of EVA.