Numerical Simulation Of Contact Analysis Of Cam-Follower Model By TYCON

The valve train controls engine intake and exhaust process, which impacts engine performance and reliability directly. While the engine performance requirements continue to rise, valve train dynamic study is of great significance. Thesis analyzes the four-valve-overhead-cam valve train work process, and with the application of professional software AVL / TYCON, a dynamic model of valve train and chain drive model are established. The dynamic characteristics simulation and analysis have been done. More work is done to do a detailed study of cam-tappet contact stress.1. With the application of software TYCON, the valve train dynamic models are established, and dynamic analysis at idling, rated speed as well as a series of common speed is done. According to international evaluation criteria, evaluations of the engine performances can be done to identify the key advantages and disadvantages through qualitative and quantitative analysis. Optimization strategy is then explored.2. Relying on the power of software TYCON, factors of affecting cam - tappet contact stress are studied by quantitative analysis. Using the "variables controlling" method, selected test objects are discussed respectively in different working conditions. Strategies are given out to avoid the terrible accidence.3. Further study is done to the dynamics simulation of chain drive results of. By using FFT technique to make the spectrum characteristic diagrams, key characteristics responses are shown stimulated by engine orders, which can analyze effects of "polygon effect" and the engine natural frequency to them. And affected regions of dynamic characteristics by "polygon effect" can be identified then.