Patent ID: 6671156
Filing Date: 2003-12-30
Classification: F01L

Abstract:
A method for controlling electromagnetic actuators for the induction and discharge valves of internal combustion engines in which an actuator (1,40), connected to a control unit (10) is coupled to a respective valve (2,41) having a real position (Z) and including a movable element (3,42) operated magnetically by means of a resultant force (F) to control the movement of the said valve (2,41) between a closure position (ZSUP) and a fully open position (ZINF); the said control unit being connected to piloting means (15) and including supervision means (11), open loop control means (12), closed loop control means (13) and first selector means (14) controlled by a first switching signal (SW1) generated by the said supervision means (11); the said selector means being operable to connect the said piloting means (15) selectively to the said open loop control means (12) and to the said closed loop control means (13); the method being characterised in that it comprises the steps of:a) operating in an open loop control mode (12) for controlling the real position (Z); b) operating in at least one closed loop control mode (13) for controlling the real position (Z); and c) alternatively selecting the said open loop control mode (12) and the said closed loop control mode (13).