Dynamic modeling of national engine on mounts together with experimental validation

In this study, a six-degree-of-freedom dynamic model for the national engine on mounts is presented and is validated by experimental tests. Dynamic equations of the motion were derived using Lagrange’s and Newton-Euler equations. In addition, a thirteen-degree-of-freedom dynamic model for the engine and the vehicle was employed to consider dynamics of the vehicle body, tires and suspension systems in the vibration behaviour of the engine. Simulations were performed using data related to the national engine and the Samand vehicle. Experimental tests were performed on the Samand vehicle with the national engine using the chassis dynamometer. Finally, the validity of the presented mathematical model and the consideration of dynamics of the vehicle body, tires and suspension systems on the vibration behaviour of the engine were investigated.