A Mathematical Model for Determining Rolling Resistance of Agricultural Tire to Control Energy Losses

Year 2014, Volume: 10 Issue: 3, 183 - 187, 01.06.2014

Masoud Gharıbkhanı

Abstract

One of the most important performance parameter of the towed pneumatic wheel is the

rolling resistance, which is influenced by tire design, temperature, soil conditions and etc. The

rolling resistance of tires is one of the major sources of energy losses of any moving vehicle and

accordingly vehicle fuel consumption. In this research we tried to determine the rolling resistance

of transport type agricultural tire on firm soil terrain roads. The tire was tested at different levels of

inflation pressure (34.5 to 207 kPa), normal load (0.981 to 4.905 kN) and forward speed (3 to 7

km/h). These tests were conducted on firm clay loam soil in a soil bin by means of single wheel

tester having single tire test carriage with four-bar parallel linkages. Different combination of

vertical loads, inflation pressures and forward speeds were considered to observe the respond of

rolling resistance toward these combinations. Effects of these factors on rolling resistance were

analyzed separately and also the interaction of the factors was acquired and finally a mathematical

model was developed to predict the rolling resistance of tire. The mathematical model was able to

predict the rolling resistance under this test condition in an acceptable manner and it showed that

such models would be used as useful tools for assessment of tire efficiency before choosing for any

specific use.

Keywords

single wheel tester, energy losses, mathematical model

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