Abstract: A method of controlling a continuously variable valve lift apparatus, may include determining a desired valve lift of the continuously variable valve lift apparatus based on a driving status, determining a first correction factor based on the driving status, determining a second correction factor based on an amount of air flowing into an engine, determining a final correction factor from the first correction factor and the second correction factor, determining a critical value of operation inclination of the valve lift from the final correction factor and an operation status of a transmission, and controlling the operation of the continuously variable valve lift apparatus on the basis of the determined desired valve lift within the critical value of the operation inclination of the valve lift.

Abstract: A method is provided for compensating for a valve lift deviation between engines equipped with a CVVL mechanism, in which the valve lift deviation is compensated for by an MAF sensor for measuring a reference air flow rate and an MAP sensor for measuring the pressure of an intake manifold. The method includes determining whether learning conditions for learning a valve lift deviation are met; after the determination, comparing a value MAP_MES measured by the MAP sensor and a modeled pressure MAP_MDL of a surge tank; if the MAP_MES value and the MAP_MDL value are different, learning the valve lift, and after the learning, calculating the final valve lift by adding the learned value of the valve lift to the basic valve lift characteristics.

Abstract: A method of controlling a continuously variable valve lift apparatus, may include determining a desired valve lift of the continuously variable valve lift apparatus based on a driving status, determining a first correction factor based on the driving status, determining a second correction factor based on an amount of air flowing into an engine, determining a final correction factor from the first correction factor and the second correction factor, determining a critical value of operation inclination of the valve lift from the final correction factor and an operation status of a transmission, and controlling the operation of the continuously variable valve lift apparatus on the basis of the determined desired valve lift within the critical value of the operation inclination of the valve lift.

Abstract: A method is provided for compensating for a valve lift deviation between engines equipped with a CVVL mechanism, in which the valve lift deviation is compensated for by an MAF sensor for measuring a reference air flow rate and an MAP sensor for measuring the pressure of an intake manifold. The method includes determining whether learning conditions for learning a valve lift deviation are met; after the determination, comparing a value MAP_MES measured by the MAP sensor and a modeled pressure MAP_MDL of a surge tank; if the MAP_MES value and the MAP_MDL value are different, learning the valve lift, and after the learning, calculating the final valve lift by adding the learned value of the valve lift to the basic valve lift characteristics.