Research on Tortional Vibration Characteristics of Series Spring Damper for Hybrid Electric Vehicle

In this paper, the torsional vibration characteristics of series spring torsional damper for hybrid electric vehicle are studied. Firstly, dynamic sofeware is used to build the physical simulation model of the hybrid transmission system under the direct drive acceleration condition, and the modal analysis of the transmission system is carried out, and the local mode of the series spring torsional damper is found. Through the torsional vibration analysis and real vehicle test of the hybrid power train, the influence of the local mode of the series spring torsional damper on the torsional vibration of the power train is confirmed, local modes can amplify the torsional vibration response of the drive train and cause the gear rattle problem. Secondly, the sensitivity analysis is carried out to find out the key influencing factors. Finally, the improved torsional damper is simulated to confirm the improvement effect. The conclusion provides a reference for the optimization of the series spring torsional damper.