A study of useage influence affecting tyre rolling coefficient

Abstract

The objectives of this research are to study the rate of deterioration of tyre friction coefficient and investigate the quality of new and old tyres that are currently in use. A set of the rolling resistance testing was designed and set up to work with the single dynamometer according to speed 80 km/h, tire load 4,660 N and inflation pressure 30 psi. There were three tire samples, new tire, one year used tire and two year used tire to find the rolling resistance coefficients. The finding shows that the rolling resistance was inverse variation with tire aging. For instance, the new tire (1st sample) had the highest rolling resistance on the other hand the two year used tire (3th sample) had the lowest rolling resistance. Moreover, the rolling resistance coefficients were inverses variation with tire aging. Besides, the one year used tire had the average of the decreasing rate of the rolling resistance coefficient at 0.03689 N/kN per a week while the two year had the average of the decreasing rate of the rolling resistance coefficient at 0.03671 N/kN per a week. Furthermore, the result also revealed that the rolling resistance coefficients nonlinearly decreased comparing to the tire aging.