Mechanical Regenerative Braking System For Higer Bus

Abstract

There Were Many Efforts Have Been Made In Finding Alternative Energy Sources Rather Than BasedOn Petroleum Fuels Due To Its Intermittency And Increase In Price. The Other Approach Is To Use The Available Energy Effectively By Minimizing The Energy Wastage And Recycling The Energy By Using Regenerating Devices. During Utilization The Energy Need To Be Converted From One Form To The Other Form. This Conversion Causes Energy Wastage/Loss/ Due To Inefficiency Of The Device Used To Convert The Energy. In Braking The Vehicle Kinetic Energy Converted Into Heat Energy And Wasted To The Environment. This Braking Energy Can Be Stored In Regenerating Devices Such As Fly Wheel, High Voltage Battery, Flat Spiral Spring, Etc Before It Converted Into Heat. This Energy Reused To Restart The Vehicle Or For Acceleration. Higer Bus Is One Of The Transportation Means In Addis Ababa That Used For Short, Medium And Long Distances. The Bus Brake Operates Repeatedly Due InLoading And Delivering The Passengers. The Aim Of This Thesis Work Is To Design And Analysis Mrbs For Higer Bus Using Flat Spiral Spring As Energy Storage Device. Mrbs Stores Braking Energy In A Flat Spiral Torsion Spring In The Form Of Strain Energy And The Energy Stored Permanently In The Spring Until Needed. This Mrbs Is Designed For Ankai Higer Bus Operated InAddis Ababa That Delivers About 55 Passengers Per Trip Beyond The Manufacturer Limit 40Passengers. According To The Result, The Energy Stored In The Flat Spiral Spring Is Inversely Proportional To Both Spring Length And The Vehicle Speed. The Spring Efficiency For The Spring Length Of 2000mm Or 2m Moving At 40km/H Is Greater Than 45 Percent. If The Length Of The Spring And Vehicle Speed Is Further Increased The Efficiency Of The Spring Lowered. The Cad Model Of The Planetary Gear Assembly Made Using Catia Vr5 And Solid Work Software And The Model Imported Into Ansys 16.0 For Structural Analysis In Ansys Workbench. From Analysis The Result For Stress, Strain And Deformation Distribution Had Drawn. The Aak Compact Alternator Is Also Connected To One End Of The Mrbs To Get An Output Of Around 1.7kwatt (1680watt). The Electric Energy Regenerated Can Be Used To Recharge The Battery Or To Fulfill Electric Need Of The Vehicle. ItIs To Recommend The Automotive Industries, Automotive Manufacturers And The Universities To Motivate And Fund The Researchers To Investigate To Develop Environmentally Friendly And Technologically Advanced Regenerative Brake System