Restricted accessResearch articleFirst published online 2026-2
Utilizing dynamic road stress factor to determine optimal pressure for air suspension system on tractor semi-trailer to minimize dynamic tire forces impacting on road
This research delves into optimizing the pressure within air suspension systems installed on tractor semi-trailers, leveraging the Dynamic Road Stress Factor. Initially, two models are proposed: one employing a leaf spring suspension system for all axles, and the other incorporating an air suspension system for the two rear axles of the tractor. The air springs are characterized using the Gensys model, focusing on vertical dynamics. The characteristic curve of an air spring is built based on the excitation frequency. Assessment of tractor semi-trailer performance utilizing air suspension reveals a notable 20% reduction in dynamic forces exerted on the road surface compared to leaf spring systems. Ultimately, optimal air spring pressures are determined through the evaluation of the Dynamic Road Stress Factor for the tractor’s two rear axles. Based on these results, the study has proposed a plan to adjust the pressure of air springs according to different operating conditions.
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