Patent ID: 9435232
Filing Date: 2016-09-06
CPC Classification: F01L

Claim Text:
1. An electronic active lock pin control method, comprising: (A) checking whether a default position of a lock pin is present, when a continuously variable valve timing (CVVT) controller detects a generation of a middle phase type CVVT target value; (B) determining whether the checked default position of the lock pin is due to lock pin parking or limphome; (C) entering the default position of the lock pin into an active mode in which a lock pin unlocking delay is solved by applying a control duty of a middle phase type oil-flow control valve (OCV) at a time of the lock pin default position by the lock pin parking, while entering the default position of the lock pin into a passive mode in which the lock pin unlocking delay is solved by not applying the control duty of the middle phase type OCV supplying oil to a lock pin unlocking oil chamber in which the lock pin is accommodated at a time of the lock pin default position by the limphome; and (D) performing a phase control mode to track the middle phase type CVVT target value after the passive mode or the active mode.