Analysis Of Ride Comfort Performance Of The Passenger Car Based On Suspension System

Suspension is one of the important assemblies in modern vehicle. The main function of the suspension is to transfer all force and torque, it regulates the relative motion between the axle (wheels) and the frame (body), absorbs the impact due to uneven surface, reduces the vibration causing by the impact at the same time, so that the vehicle could ride comfortably. The suspension system effects directly on the performance of vehicle, especially handling stability, ride comfort performance, steering ability, and prolongs the tires'life, etc.It is discussed first that the estimate method about ride comfort performance of vehicle in this paper, and we summarize the methods of frequency domain analysis, transfer function and coherence function about the vibration signal of the vehicle vibration theory, then we analysis the vibration characteristic of some important components such as engine, drive shaft, etc. Basing the research we build the four-freedom model of ride comfort performance analysis of passenger car and the two-freedom model of the suspension system, then analyze the influence of suspension system parameters on the vehicle body vibration response, build the analysis program of suspension system at last.Aimed at the vibration problem of the passenger car during operating, we determine the reason of sympathetic vibration depending on abundant experiments. The analysis about suspension system can put a new design-project of suspension parameters, and we make corresponding road experiments. The result of these experiments show that the vibrating of the passenger car could be improved by equipped the newest suspension, so the matching analysis of the suspension system can increase greatly ride comfort performance of vehicle.