Method of controlling intermediate phase cvvt

Abstract

A method of controlling an intermediate phase Continuous Variable Valve Timing (CVVT) includes, in order to determine whether a CVVT operation of an engine can be performed, a voltage of a battery, a pressure of an engine oil, and a temperature of the engine oil are detected, and it is determined whether a CVVT operation can be performed on the basis of the detected voltage of the battery, the detected pressure of the engine oil, and the detected temperature of the engine oil.

What is claimed is: 
     
         1 . A method of controlling an intermediate phase Continuous Variable Valve Timing (CVVT), wherein in order to determine whether a CVVT operation of an engine can be performed, a voltage of a battery, a pressure of an engine oil, and a temperature of the engine oil are detected, and it is determined whether a CVVT operation can be performed on the basis of the detected voltage of the battery, the detected pressure of the engine oil, and the detected temperature of the engine oil. 
     
     
         2 . The method of  claim 1 , wherein when the detected pressure of the engine oil is larger than a predetermined pressure setting value, it is determined that an engine oil pressure condition for the CVVT operation is satisfied. 
     
     
         3 . The method of  claim 1 , wherein when the detected temperature of the engine oil is larger than a predetermined temperature setting value, it is determined that an engine oil temperature condition for the CVVT operation is satisfied. 
     
     
         4 . The method of  claim 1 , wherein when the detected voltage of the battery is a value between a predetermined low setting value and a predetermined high setting value, it is determined that a battery voltage condition for the CVVT operation is satisfied. 
     
     
         5 . The method of  claim 1 , wherein when all of a battery voltage condition, an engine oil pressure condition, and an engine oil temperature condition are satisfied, it is determined that a condition for driving a cam by the pressure of the engine oil is satisfied. 
     
     
         6 . The method of  claim 1 , wherein, as a previous step for driving a cam for opening and closing a valve of an engine, a location of the cam is identified, and then the voltage of the battery, the pressure of the engine oil, and the temperature of the engine oil are detected.