airless tyres

AIRLESS TIRE

Presented BYJayant N Sarode(14MCD0017)VIT UNIVERSITY VELLORE

1

CONTENTS

What is a pneumatic tire and its drawbacks

What is an airless tire?

How it works?

Different design approaches

Advantages and disadvantages

Applications

2

PNEUMATIC TIRES A pneumatic, or air-filled, tire is

made of an air tight inner core

filled with pressurized air.

The pressure of the air inside the

tire is greater than atmospheric

air pressure.

Cushioning Effect

3

DRAWBACKS

Puncture or Blowout.

A blowout at high speeds can lead

to a dangerous car accident.

Variations in air

pressure changes tire performance.

Can blow out by gunfire or

explosion.

4

Introduction

The Tweel Airless Tire was first developed in 2005

by Michelin.

The Tweel name is a combination of the words tyre

and wheel.

Tweel's hub connects to flexible polyurethane

spokes which are used to support an outer rim.

5

WHAT IS AIRLESS TIRE?

Airless TIREs or

Non-pneumatic

TIREs (NPT) ,

are TIREs that

are not

supported by air

pressure.

6

AIRLESS TIRE

7

HOW IT WORKS?

The flexible tread and

shear bands deform

temporarily as the spokes

bend, then quickly go

back to the initial shape.

8

9

Deformation of tire when it get through the

obstacle

DESIGN APPROACH

NASA’S Apollo

Lunar Rover

Michelin

10

continued..

Bridgestone

Resilient

Technologies,

LLC

11

ADVANTAGES

Eliminates air leaks or TIRE blow outs.

No maintenance required.

Facilitate recycling.

Remains mobile even with some of the spokes are damaged

or missing.

Durability & Long Life.

Can take gunfire or explosion.

Less environmental impact.

12

DISADVANTAGES

Lack of adjustability.

Vibration.

Different Manufacturing technique.

Not as economic as pneumatic TIREs.

13

APPLICATIONS

Used on some small vehicles

such as riding lawn

mowers and

motorized golf carts.

In backhoe or bulldozers.

14

APPLICATIONS

For Military vehicles

All Terrine Vehicles (ATV)

15

Futuristic Design

16

Hankook i-Flex

Aims to keep losses to minimum

95% manufacturing is recyclable

CONCLUSION

No improvements are made in TIREs nowadays.

Manufacturers have started to focus making

airless TIREs.

Challenge is to make it more feasible and

economical.

When done, Airless TIREs are the future TIREs.

17

18