It is airless tyres

1. A SEMINAR PRESENTATION
ON
“AIRLESS TYRES”
DEPARTMENT OF
MECHANICAL ENGINEERING
Submitted To- Submitted by-
Mr. Gourav Purohit Nand Kr Sharma
Head of department B.Tech 8th
Sem.
Mechanical Engineering 16ERAME031

2. Contents
⚫ Introduction
⚫ Function of Tyre
⚫ Properties of Tyres
⚫ Types of Tyre
⚫ What makes Tyre “AIRLESS”
⚫ Advantage
⚫ Future Challenges
⚫ References

3. Introduction
• Tyre is a rubber member which gives the
cushion to the automobile. It consists of outer
cover i.e. tyre proper and tube inside.
• The tyre-tube assembly is mounted over the
wheel rim and air inside the tube carries entire
load and provides cushion.
3

4. Functions of tyre
• To support the vehicle load.
• To provide cushion against the shocks.
• To transmit driving and braking forces to the road
• To provide cornering power for smooth steering.

5. Properties of tyres
• Non-skidding
• Uniform wear
• Load-carrying
• Cushioning
• Power consumption
• Tyre noise
• Balancing

6. Types of tyres
• Conventional tubed tyre.
• Tubeless tyre.
• Non Pneumatic tyre

7. Non Pneumatic Tyre
⚫ Bridgestone Corporation announced it has
developed “Air Free Concept (Non-Pneumatic)
Tire” at the 43 Tokyo Motor Show 2013.

8. • Since the earlier invention of a non-pneumatic
wheel in 1920’s, the non-pneumatic tire (NPT)
is getting more attention due to its advantages
over the pneumatic counterpart.
• Many design studies are still needed from the
viewpoint of material, pattern, and structures.
• However, no systematic research for such
important design issues has been reported in
the literature up to now.

9. What makes tyres
“AIR LESS”
⚫ Structure of spokes stretching along the inner sides
of the tires supporting the weight of the vehicle.
⚫ A synthetic resin that becomes flexible when heated,
can be processed into a variety of shapes, and
becomes hard when cooled. The changes from
heating and cooling can generally be repeated,
making it easy to both mold and recycle the material.

11. Flexing of
spokes

12. Advantages of tubeless tyres
• Lesser unsprung weight.
• Better cooling.
• Lesser rolling resistance.
• Comfortable ride.
• Slower leakage of air.
• Simpler assembly.
• Improved safety.

13. TWEEL by Michelin
Tweel for
Segway.
Tweel for
construction
vehicle

14. 3D model of airless tire

15. • Michelin first announced the Tweel in 2005
• The name is a combination of the words tire and wheel
because the Tweel doesn’t use a traditional wheel hub
assembly.
• A solid inner hub mounts to the axle. That’s surrounded
by polyurethane spokes arrayed in a pattern of wedges. A
shear band is stretched across the spokes, forming the
outer edge of the tire (the part that comes in contact with
the road).

16. When the Tweel is put to the road, the spokes absorb
road impacts the same way air pressure does in
pneumatic tires. The tread and shear bands deform
temporarily as the spokes bend, then quickly spring
back into shape.

18. Future Challenges
⚫ Goodyear in collaboration
with NASA Glenn Research
Center (GRC), develop non-
pneumatic tyres for use first
on the moon, and eventually
on Mars.

19. ⚫ The Spring Tire has now been recognized with a
so-called “Oscar of Innovation” at the 44th
Annual R&D 100 Awards in Orlando, Florida.

20. References
⚫ www.google.com
⚫ http://www.bridgestone.co.in/
⚫ http://www.newindianexpress.com/business/
news/article284682.ece
⚫ http://gizmodo.com/tag/tires
⚫ http://www.toxel.com/tech/2009/07/05/
innovative-airless-tires-by-michelin/.

21. THANK YOU