Abstract
In recent years, reducing the number of cylinders of an engine has been advanced for fuel saving. However, as the cylinder number is reduced, the torque fluctuation from the engine increases and the NV performance deteriorates. Therefore, the importance of torsional vibration reduction technology has been rapidly increased, and active research and development is under way. Among them, CPVA is attracted to attention because it effects in the full revolution range. In this study, focusing on the pendulum path for the purpose of improving the performance of CPVA, the influence of the path on the vibration damping performance of CPVA is clarified. In order to clarify the influence of the pendulum path, in the theoretical analysis, the pendulum path is an arbitrary path and it is represented by a 6-order function. Next, in order to verify the effectiveness of the theoretical analysis result, a multibody dynamics model corresponding to the theoretical analysis model is developed and the results of both are compared. Furthermore, theoretical analysis calculations clarify the influence of the pendulum path on the vibration damping performance of CPVA numerically.
