This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Influences of Controlling Tire Inflation Pressure on Handling Characteristics of Off-Road Vehicles
Technical Paper
2022-01-0286
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
This paper investigates the effect of tire inflation pressure on the directional stability of All Wheel Drive (AWD) vehicles during high-speed off-road maneuvers over different soft terrains such as loam, sand and clay. For this purpose, a fourteen-degrees-of-freedom (14-DOF) full parametrized vehicle model is employed and numerically simulated in MATLAB/Simulink environment to represent the full vehicle body dynamics such as roll, yaw and pitch motions. In order to calculate tire forces and moments over deformable terrains, the AS2TM Soft Soil Tire Model was successfully integrated with the vehicle model which enabled the possibility of changing tire pressure and consequently investigate its effect on vehicle dynamics. Numerous simulations are carried out to examine vehicle handling in case of different tires inflation pressure during steady state turning maneuvers such as ramp steer input. Simulation results at both moderate and high-speed turning maneuvers showed that changing tire inflation pressure is significantly affecting vehicle handling characteristics such that it can be changed from understeer to oversteer behavior for excessively reduced tire inflation pressure.
The paper is also presenting a proposal for a Central Tire Inflation System (CTIS) which is verified using laboratory test-rig. The proposed CTIS is mainly intended to use a professional control system using Programmable Language Control (PLC). The control system is based on two analog pressure sensors which are used as feedback of the real tire inflation pressure. The driver can control tire pressure either manually by selecting the tire pressure value or automatically by specifying the soil type. The driver interface system is implemented using ten inches touch screen which is also used to show the tire pressure instantaneously. The proposed CTIS system is effective, reliable, inexpensive and request no modifications in vehicle axles.
Authors
Topic
Citation
Sharaf, A. and Mohamed, A., "Influences of Controlling Tire Inflation Pressure on Handling Characteristics of Off-Road Vehicles," SAE Technical Paper 2022-01-0286, 2022, https://doi.org/10.4271/2022-01-0286.Also In
References
- Dasch , J.M. and Gorsich , D.J. Survey of Modular Military Vehicles: Benefits and Burdens Defense A R Journal 23 1 2016
- Sheik Dawood , M. , Fardhan Ahmed , A. , Jehosheba Margaret , M. , and Yesubai Rubavathi , C. Armored Modular and Non-Modular Vehicle: A Survey International Journal of Engineering and Advanced Technology (IJEAT) 8 3 2019
- Björgvin Rúnar Þórhallsson 2015
- Lach , B. The Influence of Tyre Inflation Pressure—A Comparison between Simulation and Experiment 1st East Europe Conference of the ISTVS Wroclaw 1996
- Lach , B. Strategies for Automatic Tire Inflation Pressure Control 7th European Conference of the ISTVS Ferrara 1997
- Lach , B. Individual Tire Inflation Management for Multi-Axle Vehicles 13th International Conference of the ISTVS Munich 1999
- Sharaf , A.M. , Rahnejat , H. , and King , P.D. Analysis of Handling Characteristics of All-Wheel Drive Off-Road Vehicles Int. J. Heavy Vehicle Systems 15 1 2008 89 106
- Sharaf , A.M. , Mavros , G. , Rahnejat , H. , King , P.D. et al. Optimization of AWD Off-Road Vehicles Performance Using Visco-Lock Devices Int. J. Heavy Vehicle Systems 15 2/3/4 2008
- Sharaf , A.M. , Mavros , G. , Rahnejat , H. , and King , P.D. Multi-Physics Modelling Approach in All Terrain Vehicle Longitudinal Dynamics Proceedings of IMECE06, ASME International Mechanical Engineering Congress and Exposition Chicago, IL 2006
- Sharaf , A. and Nassar , M. Off-Road Vehicles’ Traction Performance Augmented by Controlling Tire Inflation Pressure SAE Technical Paper 2021-01-0327 2021 https://doi.org/10.4271/2021-01-0327
- Bekker , M.G. Theory of Land Locomotion: The Mechanics of Vehicle Mobility Ann Arbor, MI University of Michigan Press 1956
- Bekker , M.G. Off the Road Locomotion Ann Arbor, MI University of Michigan Press 1960
- Bekker , M.G. Introduction to Terrain-Vehicle Systems Ann Arbor, MI University of Michigan Press 1960
- AESCO 2005 http://www.aesco.de/
- Harnisch , C. , Lach , B. , Jakobs , R. , Troulis , M. et al. A New Tyre-Soil Interaction Model for Vehicle Simulation on Deformable Ground Vehicle System Dynamics 43 2005 384 394
- Harnisch , C. 2001
- Wong , J.Y. Theory of Ground Vehicles 3rd New York John Wiley