Análisis de los coeficientes de adherencia de los neumáticos nuevos y usados durante el proceso de frenado de emergencia con base a reglamentos internacionales para la correcta colocación de neumáticos en el eje correspondiente

Abstract

The study focuses on evaluating the grip of new and used tires in emergency braking situations. Using tools such as the KONNWEI OBD2 scanner, an iPhone accelerometer sensor and the Physics Toolbox Accelerometer application, the coefficients of adhesion were measured on different road sections. The results showed that new tires had a higher coefficient of adhesion compared to used tires, especially at high speeds. For example, at a speed of 80 km/h, the new tires achieved a coefficient of adhesion of 0.85, while the used tires reached only 0.70. In addition, vehicle load was found to significantly influence grip, being more noticeable in used tires. These findings underline the importance of using tires in good condition to ensure safety in emergency braking, in accordance with international standards 571.135 and UN No. 13-H. In conclusion, the study provides crucial data for the correct placement of tires on the corresponding axle, thus improving road safety.