International Journal of Vehicle Structures and Systems

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Automatic Adaptation of Tire Pressure According to Operating Conditions


Affiliations
1 Military Technical College, Egypt
2 Dept. of Automotive and Tractors Engg., Helwan University, Egypt
3 Future University in Egypt (FUE), Egypt
 

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The off-road vehicles have much higher rolling resistance due to tire sinkage. This paper presents a proposed system for automatic adaptation for tire inflation/deflation, according to operating conditions. The tire inflation pressure is manually changed by the driver to some prefixed pressure values. The proposed control system is based on calculating the instantaneous wheel slip ratio. As the slip ratio increases, the tire pressure decreases automatically to increase the contact area and to decrease the dynamic sinkage and vice versa. An algorithm for the control strategy is developed. The proposed system provides a continuous monitoring of tire pressures inside the tire and then to inflate/deflate according to terrain types. The results show that a low inflation pressure has a considerable effect on the net traction ratio where it improves the performance by 20% and the buffed tire has a better traction than lugged tire on sand.

Keywords

Terramechanics, Soil Bin, Tire Pressure, Inflation, Deflation, Slip Ratio, Dynamic Sinkage, Net Traction Ratio.
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  • F. Zoz and R.D. Grisso. 2003. Traction and tractor performance, Proc. Agricultural Equipment Tech. Conf., Louisville, USA.

  • S.K. Upadhyaya, J. Mehkschau, D. Wulfson and J.L. Glancey. 1986. Development of a unique mobile single wheel testing device, Trans. ASAE, 29(5), 1243-1246. http://dx.doi.org/10.13031/2013.30303.

  • A.P. Onwualu and K.C. Watts. 1989. Development of a soil bin test facility, ASAE, Paper No. 89-1106, St. Joseph, MI.

  • R.D. Wismer and H.J. Luth. 1974. Off-road traction prediction for wheeled vehicles, Trans. ASAE, 17(1), 8-14. http://dx.doi.org/10.13031/2013.36772.

  • R.K. Wood and L.G. Wells. 1983. A soil bins to study compaction, ASAE, Paper No. 83-1044, St. Joseph, MI.

  • M. Naderi-Boldaji, R. Alimardani, A. Sharifi and A. Tabatabaeefar. 2009. Economical hand-pushed digital cone penetrometer, Int. Agrophysics, 23, 55-60.

  • T.F. Czako. 1974. The Influence of the inflation pressure on cross-country performance, J. Terramechanics, 11(3-4), 13-23. http://dx.doi.org/10.1016/0022-4898(74)90020-2.

  • H.P. Schlechter. 1994. Design and performance of central tire inflation systems, Proc. 6th European ISTVS Conf., Austria.

  • G.H. Hohl. 2007. Military terrain vehicles, J. Terramechanics, 44, 23-34. http://dx.doi.org/10.1016/j.jterra.2006.01.003.

  • P.J. Forrest, I.F. Reed and G.V. Constantakis. 1962. Tractive characteristics of radial-ply tires, Trans. ASAE, 43(11), 108-115. http://dx.doi.org/10.13031/2013.40948.

  • A.O. Altunel and C.F. Hoop. 1998. The effect of lowered tire pressure on a log truck driver seat, Int. J. Forest Engg., 9 (2), 41-47.

  • S.K. Upadhyaya and D. Wulfsohn. 1990. Traction prediction for radial ply tires, Proc. 10th Int. ISTVS Conf., Kobe, Japan.

  • W. Sünkel. 1994. Influence of advanced chassis technology on off-road mobility determined by means of the 8x8 experimental vehicle, Proc. 6th European ISTVS Conf., Austria.

  • A. Hendy, S. Hegazy, M.A. Emam and Y. Hendawy. 2013. Development of an in-door soil bin testing facility experimental setup, Proc. 15th Int. Conf. Aerospace Sciences & Aviation Tech., Cairo, Egypt.


Abstract Views: 334

PDF Views: 147




  • Automatic Adaptation of Tire Pressure According to Operating Conditions

Abstract Views: 334  |  PDF Views: 147

Authors

A. Hendy
Military Technical College, Egypt
S. Hegazy
Military Technical College, Egypt
M. A. A. Emam
Dept. of Automotive and Tractors Engg., Helwan University, Egypt
Yehia H. Hossamel-din
Future University in Egypt (FUE), Egypt

Abstract


The off-road vehicles have much higher rolling resistance due to tire sinkage. This paper presents a proposed system for automatic adaptation for tire inflation/deflation, according to operating conditions. The tire inflation pressure is manually changed by the driver to some prefixed pressure values. The proposed control system is based on calculating the instantaneous wheel slip ratio. As the slip ratio increases, the tire pressure decreases automatically to increase the contact area and to decrease the dynamic sinkage and vice versa. An algorithm for the control strategy is developed. The proposed system provides a continuous monitoring of tire pressures inside the tire and then to inflate/deflate according to terrain types. The results show that a low inflation pressure has a considerable effect on the net traction ratio where it improves the performance by 20% and the buffed tire has a better traction than lugged tire on sand.

Keywords


Terramechanics, Soil Bin, Tire Pressure, Inflation, Deflation, Slip Ratio, Dynamic Sinkage, Net Traction Ratio.

References





DOI: https://doi.org/10.4273/ijvss.8.2.10