Patent ID: 8762027

Claim:
A method for controlling a motor in link with a variable valve lift device, the method comprising: determining whether or not to control the motor in order to control the variable valve lift device by using a measurement value of a valve lift and a target value of the valve lift; comparing a predetermined base temperature with a temperature of an engine room in order to control the motor; determining a temperature factor corresponding to the temperature of the engine room when the temperature of the engine room is larger than the base temperature; and determining a driving signal value for the motor by applying the temperature factor to a predetermined base signal value; determining a current factor corresponding to the amount of current applied to the motor, wherein in the determining of the driving signal value, the driving signal value is determined by applying the temperature factor and the current factor to the base signal value; wherein the determining of the current factor includes: determining a current average value for a predetermined time by using the current amount; and determining the current factor by using a current difference value corresponding to a difference between the current average value and a predetermined current threshold value, and wherein the driving signal value is determined by Equation: Driving signal value=a base signal value*(1−temperature factor−current factor).