Adjustment Performance of a Novel Continuous Variable Valve Timing and Lift System

A new variable valve technology that is named continuous variable valve timing and lift system by hydraulic volume adjustable is presented in the paper. The AMESim simulation model of continuous variable valve timing and lift system by hydraulic volume adjustable is established. The adjustment performance of the system is studied deeply by the simulation model. The results show that both the valve timing and valve lift of the system can be adjusted independently and continuously, the valve advance angle, the valve retard angle and the valve duration angle increase with the increase of engine speed, and the valve lift increases with the increase of engine speed or load, decreases with the increase of engine speed or load. The novel continuous variable valve timing and lift system would more meet the distribution requirements of engine.