Technical Paper
Advanced Automated Analysis Methodology for Predicting the Valve Durability
2019-01-09
2019-26-0302
Recent advancements in IC engine and Hybrid vehicles emphasize the use of higher rated fuels with higher calorific values, leading to higher operating temperature and pressure values. This makes the design of valve train components a complex task. Typically, IC engine valves are subjected to varying stresses throughout an engine cycle. This can result in fatigue failure of valves in many applications where the supplier was deficient in advanced analysis methodologies. Considering this fact, a new technique for valve durability and life predictions has been developed using various approaches such as internal semi-empirical thermal boundary conditions calculation tool, Multibody Dynamics (MBD) and Finite Element Modelling (FEM). In this study, a bi-metallic (Stem - X45 CrSi 9 3 and Head - X50 CrMnNiNbN 21 9) exhaust valve operating under direct attack valvetrain of 1.2L inline 3-cylinder gasoline engine has been considered.
