The structure, application and work principle of the idle control system on 2.4S electronic control fuel injection engine are elaborated here with the introduction of structure and working principle of its critical component: stepping motor. 详细阐述2.4S电喷发动机怠速控制系统的结构、应用和工作原理,并对其关键部件&步进电机的结构和工作原理作出相应介绍。
On the bases of carrying out idle operation, cutting and modal experiment of certain numerical controlled lathe, it is determined that weak dynamic stiffness in the spindle component of machine tool is the reason in the respect of structure for causing cutting vibration of machine tools. 在对某型数控车床进行空运转、切削及模态试验的基础上,确定了机床主轴部件动刚度薄弱是引起机床切削的结构颤振方面的原因。