its a seminar ppt about new type of airless tyres

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MICHELIN TWEEL
TECHNOLOGY
Submitted by

2. OVERVIEW
• INTRODUCTION
• MAIN PARTS
• FABRICATION DETAILS
• MATERIAL COMPOSITION
• VEHICLE USING TWEEL
• ADVANTAGES
• DISADVANTAGES
• CONCLUSION
• REFERENCES
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3. INTRODUCTION
• Tire and Wheel is combined and made a single unit.
• New airless unit
• Maintenance cost , downtime can be reduced
• Provides a puncture free and cushioned ride
• No need for complex wheel/ tire mounting equipment.
• Implemented in low speed application.
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4. MAIN PARTS
• HUB
• POLYURATHENE SPOKES
• SHEAR & TREAD BAND
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5. HUB
• Generally made up of steel
• Steel hub weighs roughly 4 kg,
• Frame of the vehicle will be connected to the hub through
nuts and bolts.
• Component which has a long life as compared to other
components of Tweel.
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6. • Replaces air and does the function of air.
• Connects between the hub and shear band.
• Absorb impact load from roads
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POLYURATHENE SPOKES

7. • Polyurethane exist today from solid materials to flexible foam
for car seats.
• Basic process involves the combination of a prepolymer with a
curative.
• Pre polymer is composed of two parts polyols and one part
diisocyanate.
• The reaction between these two components is an exothermic
reaction
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POLYURATHENE

8. 88
Polyurathane production process

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ANALYSIS
The spokes are under the subjugation of force, torque and
pressure due to car’s weight and acceleration.

10. • The conditions that are simulated are of zero initial
velocity and positive acceleration.
• This is a scenario where the car has overcome static
friction and the wheels posses higher stress.
• The design of spokes is significant in deciding the load
bearing capacity and the materials elasticity.
• Both design and material of spokes, is pivotal in the
success of airless tyres.
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11. 1111Material properties
OBSERVATIONS

12. • The maximum deflection in the spokes are within the
maximum permissible limits dictated by the material
properties.
• The design is structurally rigid and stable to withstand all
the simulated conditions
• Enough ductile to retreat to its original dimensions.
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RESULT

13. SHEAR BAND & TREAD BAND
• Part which comes in contact with road
• Great cornering stiffness
• Provides stability
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14. FABRICATION DETAILS
• Tread band – like tire tread manufacturing process.
• Rolling rubber and steel cord onto a steel drum.
• Excess material from each sheet is removed.
• Desired base thickness is achieved
• The entire assembly is vulcanized
• 4 kg steel hub casting is made .
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15. • Hub and the tread are secured concentrically
• Polyurethane is poured into a spoke and shear band mould
• The entire assembly spins
• Clean the surface.
• Cover with an adhesive .
• The polyurethane will fill the mould
• Tweel is placed into an oven.
• Solidification occurs at 100°C degrees for 4 hours.
• Assure all the Tweel components are securely bonded
together.
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17. TIRE MATERIAL COMPOSITION
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18. TWEEL MATERIAL COMPOSITION
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19. VEHICLES USING TWEEL
– EARTH MOVERS
– WHEELCHAIRS
– NASA LUNAR ROVER
– AUDI 4
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20. EARTH MOVERS
• Highly stable in all conditions
• Excellent shock absorption
• Doesn't damage the running surface
• High resistant to cuts
• Smooth ride than pneumatic tires
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21. WHEELCHAIRS
• A powered wheelchair is introduced which uses tweel.
• Used for climbing stairs.
• Suspension system in the wheelchair can be avoided.
• Avoid puncture and enables a smooth and cushioned ride.
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22. NASA LUNAR ROVER
• Six legged robot.
• Developed by NASA.
• Able to roll and walk over large range of terrains.
• Used for climbing hills.
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23. AUDI 4
• Introducing TWEEL in passenger cars.
• Tweel generates noise and vibration in the running condition.
• Tweel was not a good option for high speed applications.
• Tweel is now recommended for speed below 50mph.
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24. ADVANTAGES
• Comfortable ride and increased vehicle handling.
• Spokes provide better lateral stiffness and lower rolling
resistance.
• Absorb impacts bending the spokes.
• Lateral stiffness improves cornering and comfort ride.
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25. DISADVANTAGES
• Can withstand police spike strip making it hard for law
enforcement.
• Above 50mph Tweel vibrates considerably.
• Fast moving Tweel is unpleasantly loud and high heat is
liberated.
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26. CONCLUSION
• No downtime
• No maintenance
• No puncture
• Cushioned ride
• Used in wide variety of application.
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27. REFERENCES
Bert Bras and Austin Cobert, Life-Cycle Environmental
Impact of Michelin Tweel Tire for Passenger Vehicles ,SAE
INTERNATIONAL ,2011-01-0093 ,Published
04/12/2011
 Anuj Suhag, Rahul Dayal ,International Journal of
Scientific and Research Publications, Volume 3, Issue 11,
November 2013 1 ISSN 2250-3153
Michelin X Tweel SSL Datasheet, Michelin international.
 Austin Cobert ,Environmental Comparison Of Michelin
Tweel™ And Pneumatic Tire Using Life Cycle Analysis,
Georgia Institute of Technology December 2009
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28. THANKTHANK YOUYOU
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