Method of controlling CVVT according to current control for oil control valve
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United States of America Patent
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Aug 25, 2015
Grant Date -
Jan 8, 2015
app pub date -
Dec 31, 2013
filing date -
Jul 2, 2013
priority date (Note) -
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Abstract
A method of controlling a CVVT may include a) checking whether a predetermined time has passed, after engine starts. b) locking an actuator by driving oil control valve with different driving currents in accordance with whether a predetermined time has passed after the engine starts. c) unlocking the actuator or feed-backing control cam phase in accordance with whether the actuator is unlocked. d) feed-backing control cam phase or locking the actuator by driving oil control valve with predetermined current in accordance with whether control cam phase is not reached before the actuator is locked. e) driving the oil control valve with predetermined current to maintain the control cam phase or turning off the oil control valve, after feed-backing control cam phase or locking the actuator by driving the oil control valve with predetermined current in accordance with whether the control cam phase is not reached before the actuator is locked.
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