The Effect Of Tyre Inflation Pressure On Fuel Consumption And Vehicle Handling Performance A Case Of Anbessa City Bus

Abstract

It Is Necessary To Minimize Vehicle Power Losses To Improve Efficiency. The Inflation Pressure OfTyres Has Great Influence On Power Loss Due To Rolling Resistance. This Work Aimed To Investigate The Effect Of Inflation Pressure Of Tyre On Fuel Consumption And Vehicle Handling Performance. This Work Is Done Based On The Specifications And Study Done On Anbessa City Bus. Three Vehicle Tyre Models Are Built In Different Range Of Inflation Pressure In Catia. The Models Were Analyzed 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 LoadOn The Tyres, Rolling Resistance Variations And The Rotational Aerodynamic Effect Of Tyre Are Used AsInputs Among Other Parameters To Analyze The Fuel Consumption. From The Analysis It Is Found That In Case Of Model 3, Which Is Under Inflation, The Fuel Consumption Was 0.378 Lit/Km On Average Which Is About 11.05% More Than Model 1 With Recommended Inflation Pressure With Speed Of 60 Km/Hr. And Same Distance Travelled. It Is Also Observed That The Fuel Consumption Decreased By 9.74 % When The Tyre Pressure Was Increased From The Recommended Pressure Of0.83mpa To 0.9mpa At A Given Speed And Distance. In The Case Of Handling Performance The Bus Requires More Steering Effort To Maintain The Turning Way For The Under-Inflated Tyre, In Model 3Up To 9000 N Is Need At The Slip Angle Of 80. The Maximum Bus Tyre Slip Angle, ?? = 8?? Also Increased Due To The Bus?��?S Reduced Directional Handling Capabilities When Equipped With Underinflated Tyres.