Simulation and Measured Analysis of Dynamic Performance of Serpentine Belt Drive System

The dynamic performance of the engine front end accessory drive system is one of the important factors affecting the NVH level of the vehicle and the service life of the system itself. Obtaining the dynamic response of the system is the basis for studying its dynamic performance. This paper takes a vehicle engine serpentine belt drive system as a study object, the dynamic simulation model of the drive system is established based on Simdrive 3D. Engine bench tests were conducted to test the dynamic response of the system under acceleration, single speed and start-stop conditions, including the angular displacement of the tensioner arm, the slip rate of the pulley and the belt transverse displacement. The simulation results and measured results are compared and analyzed, and it is judged whether the design of the drive system meets the requirements. Based on the simulation model, the influence of the tensioner damping ratio on the dynamic response of the serpentine belt drive system is studied. The analysis methods and conclusions in this paper have engineering practical significance for the design and development of the tensioner and the serpentine belt drive system.