Abstract

Run-flat tires are a significant way to prevent the tire blowout traffic accidents and the inserts supporting run-flat tire (ISRFT) can successfully address the problem of zero-pressure driving after the tire blowout. The dynamic response characteristics must be developed using a reasonable tire model since the characteristics of vehicles fitted with this run-flat tire following tire blowout differ from those of normal tires (NT). In this paper, steady-state mechanical characteristics tests were carried out to obtain the mechanical characteristics after the theoretical analysis of the zero-pressure rolling for the ISRFT. Secondly, a dynamics model based on the UniTire model was developed for ISRFT with the consideration of camber angle. Finally, the effect of various camber angles on the tire blowout parameters of vehicles equipped with ISRFT and NT was compared using three sets of typical working conditions, which demonstrated the superiority of the ISRFT. The results indicate that the optimal characteristic of the vehicle equipped with ISRFT compared to vehicles equipped with NT is improved by 14.02% under steering conditions and 12.75% under double lane change conditions. This study provides a foundation for improving the autonomous characteristics of vehicles.

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