Abstract
The inflation pressure of tyres has great influence on power loss due to rolling resistance. This paper describes the effect of inflation pressure of tyre on fuel consumption and vehicle handling performance of bus. This work was done based on the specifications and study done on Anbessa city bus. Initially, three vehicle tyre models are built in different range of inflation pressure in CATIA. The models were analysed for aerodynamic drag and lift forces using Phoenix software. The specifications of the tyre P295/80R225 which is used in Anbessa city bus were taken for building models. The load on the tyres, rolling resistance variations and the rotational aerodynamic effect of tyre were used as inputs among other parameters to analyse the fuel consumption. From the analysis, it is found that in case of model 3, which is under inflation, the fuel consumption is about 11.05% more than model 1 with recommended inflation pressure with speed of 60 km/hr.
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