The self-inflating tire system was invented by CODA DEVELOPMENT and offers a major improvement over traditional tires by constantly maintaining proper tire pressure. The system uses a peristaltic pump design with a tube inside the tire that sources air from outside as the tire rotates to inflate it. Maintaining proper tire pressure improves fuel efficiency by up to 10%, reduces tire wear, and increases safety by ensuring adequate traction. While more expensive initially, the benefits of reduced maintenance and tire replacements over time mean the system saves money in the long run.

2. The Self Inflating Tire system is an invention of CODA
DEVELOPMENT, a company based in Czech Republic. The patented
SIT solution offers a major advance in solving tire pressure concerns.
Self-inflating tyres are designed to constantly maintain tyre pressure
at the proper level. Self-inflating systems are designed more for the
slow leaks and for optimizing performance and safety than for
keeping a vehicle moving on a tyre that will no longer hold air. Self-
inflating tyres allow a vehicle to adjust to the current terrain for
ideal performance and safety in those condition.
Research into reducing fuel consumption and CO2 emissions as well
as improving on the road safety.

3. About 80 percent of the cars on the road are driving with one or
more tyres under inflated. Tires lose air through normal driving
(especially after hitting pot holes or curbs), permeation and seasonal
changes in temperature. Tyres lose one or two psi (pounds per
square inch)each month in the winter and even more in the summer.
When tyres are under inflated, the tread wears more quickly. This
equates to 15 percent fewer miles which can be driven on them for
every 20 percent that they're under inflated. Under inflated tires
also overheat more quickly than properly inflated tires, which cause
more tire damage.
Statistics show that tires that are under inflated by as little as
2 psi reduce fuel efficiency by 10 percent.

5. The SIT system is based on highly reliable and proven peristaltic
pump principles. It uses the weight and motion of the vehicle to
inflate the tire as needed, sourcing air from the outside atmosphere.
The whole system consists of only two components – a tube
chamber functioning as a peristaltic pump for the tire and a pressure
management device to control the inflation.
A Peristaltic Pump
The peristaltic tubing is located longitudinally between the rim and
the tire wall and copies almost the whole perimeter of the rim. As
the tire moves against the road this closure pushes the air contained
inside the tubing into the tire and simultaneously it pulls outside air
back into the tubing. As a result, the tire is inflated with the
contents of the tubing with each wheel revolution until it reaches
its desired pressure.

7.  Reduced tyre wear
 Increased fuel economy
 Increased overall vehicle safety
 Providing sufficient airflow to the tire with minimal leakage
 Pressure adjustment based on increasing vehicle speed
 Pressure adjustment based on increasing vehicle load
 Adaptability for recreational use (inflating rafts, sports balls,
etc.)
 Implementation of interactive display
 Creation of universal design for aftermarket use

8.  Too many components
 More costly than the conventional tires.
 Requires more maintenance.
 Heavier than general vehicle.
 The user must have the basic know how of the relation between
the pressure and road condition.

9.  The main beneficiaries of this advancement in technology that will
allow for tyre pressure to be adjusted for driving.
 Reduction in tire wear and an increase in fuel economy; both of
which will result in saving money in the long run.
 The reduction in tyre disposal in landfills and decrease the rate of
consumption of natural resources.
 Both tire manufacturers and the petroleum industry will be
negatively affected by this resulting design.
 The demand for their products will decrease as tires last longer
and fewer replacements are needed.
 It is plausible to say that society as a whole will benefit from the
resulting design.

10. Self inflating tyres will become very common in the near future. It
increases the safety and the fuel efficiency of the vehicle. The
development of self inflating tyres increases the safety, comfort and
other performances of vehicle. The driver will be able to adjust the
pressure depending upon the desire driving mode, comfort, sporty
over obstacle. So “self inflating tyres are the future tyres”.

11.  http://www.google.com
 http://www.tireinflation.com
 http://www.eztire.com/tires/selfinflatingt ire.html
 http://auto.howstuffworks.com/cutting-edge-channel.htm
 http://www.azom.com/searchresults.asp?otherpage=yes&MatKeyWo
rd=&Ap