EFFECT ANALYSIS OF THE PARAMETERS OF HYDRO-PNEUMATIC SUSPENSION SYSTEM ON VEHICLE RIDE COMFORT

The purpose of this study is to analyze the effects of the parameters of hydropneumatic suspension on vehicle ride comfort. In order to achieve this purpose, a quarter-vehicle vertical dynamic model with two degrees of freedom is established under the random road surface excitation. A new mathematical model with combination of rubber and hydro-pneumatic springs for a hydro-pneumatic suspension system is proposed to reduce vehicle noise as well as improve vehicle ride. The parameters of the hydro-pneumatic suspension system such as the initial pressure and volume in air chamber and the initial diameter of damping orifice are respectively analyzed according to the international standard ISO 2631-1. The study results indicate that the suspension parameters has a great effect on the vehicle ride comfort. This study provides useful references for the semi-active hydro-pneumatic suspension system design of vehicle