2019-26-0368 Published 09 Jan 2019 © 2019 Rajarambapu Institute of Technology Analysis of Efect of Tire Infation Pressure, Infation Fluids, Load and Speed on Tire Performance Dhananjay Ganpati Thombare Rajarambapu Institute of Technology Citation: Thombare, D.G., “Analysis of Effect of Tire Inflation Pressure, Inflation Fluids, Load and Speed on Tire Performance,” SAE Technical Paper 2019-26-0368, 2019, doi:10.4271/2019-26-0368. Abstract T here are various losses associated with passenger vehicle that affect its fuel economy as it is being operated. Tese losses include losses at engine, drive- line, aerodynamic and rolling losses. While engine, driveline and aerodynamic losses are inherent with the vehicle due to large number of parts that are assembled together, rolling loss is associated with the vehicle tires and it is the only part of the vehicle that comes in contact with the road surface. Te rolling resistance of infated tires is an important component of rolling resistance to vehicle motion and contributes to vehicle fuel consumption. Hence the efect of tire parameters such as infation pressure, speed and load are the subject of much current interest. Also efect of type of infation fuid on tire performance is a need of investigation. Tis work is focused on the design and development of tire testing setup to test the tire performance parameters like rolling resistance and tire temperature by varying the load, speed, infation pressure and infation fuids. Tire 135/70 R12 65 S was selected for testing. Te test was conducted under various loads, speed, infation pressure and infation fuids were air and nitrogen. Te result of experimental analysis shows that there is increase in rolling resistance and tire temperature with increase in speed and load. Also, the rolling resistance and tire temperature increases with decreasing the infation pressure. For determining the better performance of tire among air and nitrogen, the test was conducted by varying the infation pressure, load and speed. Te results of experimental analysis shows that the tire with nitrogen gas resulted in to lower rolling resistance and lower tire temperature as compared with air. Introduction T he tires of the road vehicle play an important role in maintaining stability of the vehicle on road. When a vehicle is driven on the road, the only parts of the vehicle is in contact with the road are its tires and all the forces exerted on the vehicle by the road are transmitted through the tire. Te tire provides forces and resistance which afect the dynamics and control performance of the vehicle. Te basic functions of tire is to provide interface between vehicle to road surface, to support the vehicle load, to develop longi- tudinal force for acceleration, braking and to absorb road impacts and also to resist cornering force for safe cornering [1]. Te performance of a vehicle on road is depending on tire construction, infation pressure and the kind of surface rela- tionship with road and tire and hence, it is necessary to under- stand the efect of these parameters on tire performance. Tere is also an increasing trend to infate tire with nitrogen as an infation fuid. In recent year number of car accidents in India has increased signifcantly. Te depleting fuel sources have brought focus on best possible utilization of fuel. One of the major causes of accident is failure of tire at highspeed on highways. This may be because of lack of sufficient tire infation pressure, poor tire condition and its maintenance. Te fuel consumption of the vehicle is also afected by the tire quality and its operating parameters. Tire performance depends on many factors such as rolling resistance, cornering stifness, tire temperature, tire wear, tire ride, handling and tire traction. So, it is necessary to study the efect of operating parameters on tire performance along with efect of infating fuids on tire performance. Performance evaluation of tire on road is a difcult task, hence it is possible to test tire on a test bench in the laboratory. In this article, rolling resistance and tire temperature have been tested at diferent tire infation pressure, infation fuids, speed and load on developed drum type tire testing setup. Tire Performance test were conducted on the designed and developed tire testing setup. For testing of tire perfor- mance a passenger car tire is selected with rating as 135/70R12 65 S. Te testing of tire performance is carried out at constant infation pressure and at di ferent loads wise 30%, 50%, 70% of the maximum load capacity of tire and at diferent speed such as 30 km/hr, 40 km/hr, 50 km/hr, 60 km/hr and 65 km/hr. Also same tire were tested by infating air and nitrogen gas. Downloaded from SAE International by Dr. Dhananjay Thombare, Saturday, January 12, 2019