Influences of the Suspensions Characteristics on the Vehicle Stability

The main objective of the paper is to track the influence of the suspension system on the stability for a vehicle on a particular route using a simulation program. The suspension of the vehicle is designed to attenuate the dynamic loads that are transmitted from the road, to impart the desired character to the oscillations. The oscillations that occur when the vehicle passes over the irregularities of the road influences the technical qualities of its operation, first of all its smoothness, traction qualities, stability, maneuverability and durability. The role of the suspension is to provide the vehicle a maximum lateral acceleration on the track, which is why it must ensure the maximum grip at the wheels to the rolling surface. For this, the up and down vertical movement of the vehicle wheels will be damped such as to ensure an optimum constant contact with the road surface. The time at which the wheel oscillation (induced by a shock received from the tread) is damped must be as short as possible but not affect the grip developed by the wheel. In terms of the working methodology to achieve the purpose of the work, we rely to the simulation software (IPG CarMaker), which predefines the driver behavior, initialize the data for the vehicle suspensions predefined in the simulation program. According to the working methodology, the results obtained will be analyzed and interpreted graphically, surprisingly comparing the various situations considered in the study, with emphasizing the influence of suspension system on the vehicle body.