METHOD FOR CONTROLLING CONTINUOUS VARIABLE VALVE TIMING APPARATUS

摘要

A variable valve timing unit control method is provided to control rapidly a variable valve timing unit because the electromagnetic clutch is controlled according to the active current. A variable valve timing unit control method comprises: a step(S220) which calculates the difference between a current cam shaft phase angle and a target phase angle; a step(S230) which determines whether the difference between the current cam shaft phase angle and the target phase angle is greater than a set value or not; a step(S240) which calculates a basis torque(Tb) based on the target phase angle when the difference between the current cam shaft phase angle and the target phase angle is greater that the set value; a step(S280) which calculates a valid torque(Teff) by modifying the basis torque according to the RPM of the engine and engine oil temperature; and a step(S290) which calculates the active current corresponding to the valid torque.