Patent Document ID: 20170082037
Application ID: 14955445
Patent Flag: 0

Claim One:
1. A method for controlling valve timing of a continuous variable valve duration engine including a continuous variable valve duration (CVVD) device and a continuous variable valve timing (CVVT) device, comprising: determining a target intake valve open (IVO) timing, a target intake valve close (IVC) timing, a target exhaust valve open (EVO) timing and a target exhaust valve close (EVC) timing; determining a target intake CVVD, a target exhaust CVVD, a target intake CVVT and a target exhaust CVVT to satisfy the target IVO, IVC, EVO, and EVC timings; performing a feedback control of the CVVD by learning a minimum value of the CVVD and a maximum value of the CVVD; performing a feedback control of the CVVT based on profile information of a valve; and determining a real IVO timing, a real IVC timing, a real EVO timing, and a real EVC timing based on the feedback control of the CVVD and the feedback control of the CVVT.