Powertrain Mounting System Analysis Through Multi Body Simulation and Study of On-Ground and On-Frame Simulation Approaches 2022-28-0362

The automotive trend is now days switching towards less weight, cost effective and power efficient powertrain. Consumer’s expectations from comfort and NVH point of view is rising day by day. The NVH performance of a powertrain is mainly affected by the powertrain mounting System. In design and development of a new vehicle, the mounting of the powertrain (engine-transmission assembly) receives special attention. The powertrain body is the major concentrated mass in the vehicle Which if not adequately confined and quarantined, it will result in poor NVH characteristics of powertrain. In this work a powertrain mounting System of three-cylinder engine, which is transversely mounted, is analyzed. A correlation between two different simulation techniques has been established. Passive mounts are being assessed throughout the investigation. A multi body simulation approach is employed for the modelling and simulation of powertrain mounting system. The mounting model is built up initially as a 6 degree of freedom model (on-ground simulation) and in later part, the same model is integrated to 16 degrees of freedom model (on-frame simulation) and various responses are analyzed. The rigid body modal characteristics are analyzed using both approaches and different factors which are affecting the modal characteristics are identified. Furthermore, An optimization strategy is developed and implemented successfully to achieve the desired modal characteristics. The different simulation critiques and considerations encountered when transitioning from on-ground simulation to on-frame simulation is outlined. A correlation is established between these approaches and parameters were identified which are affecting the performance.