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

Authors : Masoud GHARIBKHANI

Pages : 183-187

View : 20 | Download : 10

Publication Date : 2014-06-01

Article Type : Research Paper

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 insert ignore into journalissuearticles values(34.5 to 207 kPa);, normal load insert ignore into journalissuearticles values(0.981 to 4.905 kN); and forward speed insert ignore into journalissuearticles values(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