The Analysis for the Influence of Engine Excitation on the Dynamical Behavior of Motor Vehicle

In the multibody dynamics analysis for motor vehicle, engine excitation, as a major excitation affecting the dynamic behavior of motorcycle frame, should be discussed. In this paper, a real-sized virtual engine model is established to replace lumped mass sphere ever discussed in dynamic simulation of vehicle, on which elaborate dynamic simulation of the valve train in engine is conducted at working condition to investigate the dynamic response of frame. The vertical acceleration response of the frame is achieved by using solution formulations set in professional program, and the comparison is discussed between different simulation results of frame dynamic behavior with or without engine excitation to determine the significance of dynamic simulation with considering the interaction between excitation and mechanism which is then utilized to discuss the vibration and smoothness performance of whole mechanical system.