Control method and control system for lift switching actuator of variable valve lift mechanism

The invention provides a control method and a control system for a lift switching actuator of a variable valve lift mechanism. The control method comprises the following steps: outputting an initial driving signal with a preset duty ratio by a valve lift switching initial controller, so as to obtain the current resistance value of an actuator winding coil; in the subsequent lift switching process, based on the obtained resistance value of the winding coil, acquiring the resistance value of the winding coil in real time through an actuator lift switching driving current threshold value and sampling of the present current of the actuator winding coil; and determining the duty ratio of a driving signal needing to be output by the controller based on the real-time resistance value. According to the control method, by means of real-time adjustment of the duty ratio of the driving signal, the current of the actuator coil winding can be kept at the set lift switching driving current threshold value, the control prec