Laboratory measurement of rolling resistance in truck tyres under dynamic vertical load

Abstract

This paper deals with the rolling resistance of heavy vehicle tyres measured on a large drum under dynamically varying vertical load. The aim is to simulate in the laboratory the dynamic loading conditions arising from interaction of the vehicle with a randomly rough road. A dynamically varying vertical force is generated using a hydraulic actuator. A comprehensive set of experimental data for two different truck tyres is presented, and the influence of dynamic load on the mean rolling resistance is quantified and discussed. The measurements indicate that there is no significant effect of dynamic vertical load on the mean rolling resistance of the two tyres tested.

Development of an advanced data analytics model to improve the energy efficiency of haul trucks in surface mines

“…Interval (M) [160], Tyre Pressure (TP) [172] and Truck Speed (S) [180] can be found in Figure 5-6, Table 5-3. Caterpillar trucks are the most popular vehicles of the different brands used in the studied mine.…”

“…Tyre diameter has been identified in several studies as a contributor to RR [165,180]. The contact patch, or area of the tyre in contact with the road changes with tyre diameter and so this change in geometry results in a change in RR.…”

“…A study found that increasing tyre pressure resulted in decreasing RR [180]. Tyre pressure is also affected by temperature, with a study by Paine, Griffiths and Magedara [176] finding increasing tyre temperature responsible for increased tyre pressures.…”

“…The results of study completed by Ma, Xu and Cui [178] showed significant increases in RR with increasing tyre load. Tyre temperature has been the subject of several studies with its relationship with RR being the focus of experimental analysis [176,180,182,183]. A study conducted by Janssen and Hall [183] found that increasing tyre temperature resulted in decreased RR.…”

“…It can however be linked to other parameters such as tyre loading, through basic physics. As a truck corners, it generates centripetal force, which is dependent on the mass of the truck, velocity and radius of the turn [180]. Both turn radius and velocity are dependent on the driver behaviour.…”