Simulation of engine valve train dynamics

The mathematic model of single valve train, lagrangian formulation, is built up. Through it, the dynamic characteristics of the single valve train are simulated with MATLAB. The result indicates that the deformation of some parts of the valve train affects their dynamic coupling. So the acceleration of valve and contact force between the cam and running pulley fluctuate severely. The valve train dynamic performances become deteriorative. The study in this paper provides a theoretical approach for the evaluation and optimization of dynamic performance of valve train.