new age tyres
#1

hi plz send me this topic pdf and ppt
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#2
The silent evolution of tires
The continuous improvement of safety, durability and performance is the major drive in the worldwide
tire industry. Combinations of aramid, nylon 66 and rayon result in stronger tires with lower rolling resistance and improved cut resistance. Thus the use of high performance fibers plays a major role in the evolution.

Motorcycle tires:
Aramid is excellent in Ëœcut beltâ„¢ radial motorcycle tires. The wind-on belt tires perform well. Drivers

of touring bikes focus on the durability of their tires, for
drivers of sports bikes grip is the most important factor.

Aircraft tires:
The major trend in aircraft tires is the ongoing radialization
. All new military fighter aircraft will be

fitted with radials and many military aircraft originally fitted
with diagonal (Ëœbiasâ„¢) tires are now being retrofitted with
radials. Aircraft tires operate

under high loads hence the cords are subject to high

compressive loads. and hence safety should be a major factor. Aramid with its high impact strength can

also play a role in increasing the resistance against FOD

and thus in increasing the safety of aviation.


The Strategy of Innovation:
The resources destined for research and
development activities account on average for over 4% of the consolidated turnover, of the tyre industry. The MIRS (Modular Integrated Robotized
System) is an advancement in the tyre manufaqcturing industry. It is is a highly robotized system
for the manufacture of small batches of
products: based on the concept of highly
flexible production modules “ that may be
located strategically according to the
demands of the reference market “ with a
high degree of automation. also it helps in efficient operation even in countries in
which the cost of labour has significant
weight.


Run flat tyres
an innovative range of run-flat tyres based on a self-supporting technology that permits the tyre to be used safely even in the case of a loss of pressure. by eliminating the joints in thebuilding phase of the tyre permits particularly high reliability to be obtained from tyres.

Tyre pressure sensors and automatic re-inflation
through the insertion of a sensor in
the valve cap reveals in real time any tyre
pressure anomalies and communicates them in various ways to the driver, and the state of the tyre is communicated to the vehicleâ„¢s on-board computer. a sensor
placed beneath the tread transmits data on
the state of the tyre to the vehicleâ„¢s on-board
computer which is a system called the cyber-tread.

For more details:

[attachment=2415]

http://pirellityreweb/technology/innovation/pirelli-evolution/default.page
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#3
please read http://studentbank.in/report-new-age-tyres--7956 and http://studentbank.in/report-new-age-tyres and http://studentbank.in/report-truck-tyres-full-report and http://studentbank.in/report-self-inflat...ull-report for more about new age tyres information and more..
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#4
[attachment=13384]
INTRODUCTION
The primary purpose of the tyre is to provide traction.
1. Tyres also help the suspension absorb road shocks, but this is a side benefit.
2. They must perform under variety of conditions. The road might be wet or dry; paved with asphalt, concrete or gravel; or there might be no road at all.
3. The car might be traveling slowly on a straight road, or moving quickly through curves or over hills. All of these conditions call for special requirements that must be present, at least to some degree, in all tyres.
4. In addition to providing good traction, tyres are also designed to carry weight of the vehicle, to with-stand side thrust over varying speeds and conditions, and to transfer braking and driving torque to the road.
5. As the tyre rolls on the road, friction is created between the tyre and the road. This friction gives the tyre its traction.
6. Although good traction is desirable, it must be limited.
7. Too much traction means there is too much friction.
8. Too much friction means there is lot of rolling resistance.
9. Rolling resistance wastes engine power and fuel, therefore it must be kept to a minimal level. This di-lemma is a major concern in designing today’s tyres. .
10 The primary purpose of the tyre is to provide traction along with carrying the weight of the vehicle.
In this seminar I intend to cover topics like history of tyres, different types of tyres and tread designs. I would also like to mention about tyre repair and maintenance..
HISTORY
The very first tyres were bands of iron placed on the wooden wheels of carts and wagons. Luckily, with the discovery of rubber things changed. It was in the mid 1800’s that the first tyres made using rubber appeared. They were simple tyres; the rubber carried the load entirely.
It was in 1845 that the pneumatic or air-filled tyre - which works by air within the tyre absorbing the shocks of the road – was invented and patented by RW Thomson. His design used a number of thin inflated tubes inside a leather cover (see illustrated). This meant that it would take more than one puncture before the tyre deflated. However, despite this new breakthrough in tyres, the old solid rubber variety was still favoured by the public, leaving the pneumatic tyre out in the wilderness.
It wasn’t until 1888 that John Boyd Dunlop, unbeknownst to him, reinvented the pneumatic tyre whilst try-ing to improve his son’s bike. Dunlop’s tyre, like Thomson’s, didn’t seem to sell at first - until a bike race in Belfast was won by a rider using his tyres. With that victory, people began to take notice of the pneumatic tyre.
In 1895 the pneumatic tyre was first used on automobiles, by Andre and Edouard Michelin. It was also around this time that legislation was put into effect that discouraged the use of solid rubber tyres. All over the world companies sprang up to meet the new demand for the new tyres. The age of the pneumatic tyre has begun!
Tyres remained fundamentally unchanged throughout the 20’s and 30’s until Michelin introduced steel-belted radial tyres in 1948. This new type of pneumatic tyre meant that they would have a longer life thanks to ply cords that radiate from a 90 degree angle from the wheel rim. It also meant that the tyre had less rolling resistance – increasing the mileage of a vehicle. One drawback was that these tyres required a different suspension system on the vehicle.
This new radial tyre was very successful outside of the US, with companies in Italy, France, Japan and Ger-many producing them in large numbers. In the US however, a battle commenced. American car manufactur-ers were afraid that the cost to redesign their cars in order to use these radial tyres was too much and so stuck to the older bias ply tyres.
It wasn’t until the 70’s – when there was a fuel crisis – that the American public, because of the rising cost of petrol, demanded more economical cars. This led to the introduction of cars that could easily fit the high mileage radial tyres. By 1983 all new American cars came fitted with radial tyres.
TYPES OF TYRES
1) Standard/ All Season Tyre
Your car was probably driven out of the factory on all season tyres. It is an average tyre that is suitable for all year round use. It works equally well in the wet and the dry.
The tread block pattern is designed not to be noisy when used on standard roads but enables adequate water dispersion to provide grip in wet conditions.
The rubber used is a harder compound to extend the tyre's life. This can comprise on handling and cornering but for the majority of drivers it is not noticeable.
2) Performance Tyre
Also known as summer tyres, performance tyres are designed for provide excellent grip in the dry. Often used on fast cars or for a driver whose style requires increased handling performance. They can be used all year round if you live in a region with a warm climate and little rain.
A soft rubber compound is used which decreases the lifespan of the tyre but provides enhanced grip.
It is important that the car tyres are kept in excellent condition. Driving in the wet is hard enough with these tyres but if there is any sign of wear it is virtually impossible to get good grip.
3) Winter Tyre
Winter car tyres are designed to cope with the poor weather and difficult driving conditions that the winter season brings. They can handle snow and ice. Winter tyres can have small metal studs embedded into the tread for extra grip in extreme conditions.
The tread block pattern on winter car tyres is larger and more pronounced than on standard tyres. This im-proves grip but also increases the tyres' operating noise.
These tyres cannot be used all year round because in dry conditions they wear out extremely quickly and damage the road surface.
4) All Terrain Tyre
All terrain tyres provide good grip on loose surfaces such as dirt and sand. Often used by off road vehicles, they can be used on standard roads but are very noisy.
Like the winter tyre the tread block pattern is large to improve grip. The tyre's sidewalls are stiffer to cope with uneven surfaces and unexpected potholes.
Mud tyres are an extreme type of all terrain tyres, designed to be used in mud and dirt. They have very large tread block patterns that are only suitable for driving on that type of terrain.
5) Run Flat Tyres
Run flat tyres are a relatively new concept but are now becoming more common on new cars. They are de-signed to minimise the loss of handling that occurs after a puncture.
The car tyre can operate without air to enable the vehicle to continue to be driven. However this is only suit-able for a short distance and at a reduced speed, until the tyre can be safely changed.
For further advice consult a car tyre specialist who will provide you with impartial advice on the best tyres for your vehicle.
THREAD DESIGN
Tyre Tread design

Groove:- A groove is the sunken part of a tyre's tread. Notably grooves are the fundamental components in deciding a tyre's quality. The groove improves the braking performance and driving power of a tyre. Groove depth and design also effects road noise and the rate of a tyre's treadwear.
Cuff:- The Cuff is the fine-groove along the edge of the tread pattern. The function of the cuff is to enhance braking and driving performance, and to provide driving stability and comfort. In the case of winter tyres it allows grip on icy conditions through the biting effect of the edge, and also improves braking control wet road
Rib shape:- Lateral grooves on both sides point the same direction. Good points: Good driving force and braking performance. Good water dispersal means good stability on wet roads. Correct choice for fast driving styles. Features: mounted in direction of tread pattern Use: the passenger car tyre for high speed usages.
Assymetric patter:- Tread pattern differs on each side. Good points: Good for high speed cornering thanks to greater contact area. Reduces treadwear on outside of tyre. Bad points: You must position them the right way around. Use: High performance and motorsport tyres.
Block shape:- The pattern of independent block, which the groove is connected with each other. Good points: Good steering control and stability on snow covered and wet roads. Good water dispersal properties on wet roads. Bad points: Tyre wear is heavy as tread blocks are finer. Use: Suitable for winter or all-season passenger car tyres. Suitable for back-wheel of Radial tyre of ordinary car.
Rib shape:- The pattern along the circumference of the tyre Good points: Lower rolling resistance. Good directional stability and steering control thanks to lateral resistance. Suitable for sustained high speeds thanks to low heat generation.Bad points: Poor braking & acceleration grip on wet roads. Stress caused by flex means tread is more susceptible to cracking. Use: For paved road surfaces and the steering wheels of trucks or buses.
Lug shape:- The groove pattern perpendicular to the circumference of the tyre Good points: Excellent braking & driving power. Superior traction Bad points: Noisy at high speed. It's not suitable for high speed driving because of high rolling resistance. Use: For dirt roads, rear wheels of buses, industrial vehicles and dump trucks.
Rib-Lug shape:- The combination of Rib-shape & Lug-shape. Features: The rib in the centre provides directional control whilst the shoulder lug gives good braking & driving power. Use: Good for both paved and dirt roads. Usually used in both front & rear wheels of trucks and buses
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#5

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