Airbag

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ABSTRACT:


The present topic is about safety airbags in cars. No safety device has consumed more attention and resources than the airbag. It is known with high confidencee that when a crash ours , the presence of airbag reduces fatality risk to drivers.

Airbags are subject of serious government and industry research . My seminar takes you to the history, devolopement and working aspects of airbag.


INTRODUCTION

For years, the trusty seat belt provided the sole form of passive restraint in our cars. There were debated about their safety, especially relating to children. But over time, mush of the country adopted mandatory seat-belt laws. Statistics have shown that the use of seat belts has saved thousands of lives that might have been lost in collisions.
Air Bags have been under development for many years. The attraction of a soft pillow to land against in a crash must be very strong – the first patent on an inflatable crash-landing device for airplanes was filed during World War II. In the 1980’s the first commercial air bags appeared in automobiles.



THE BASICS OF AIR BAGS
Before looking at specifics, let’s review our knowledge of the laws of the motion. First, we know that moving objects have momentum (the product of the mass and velocity of an object. Unless an outside force acts on an object, the object will continue to move its present speed and direction. Cars consist of several objects, including the vehicle itself, Loose objects in the car and, of course, passengers. If these objects are not restrained, they will continue moving at whatever speed the car is traveling at, even if the car is stopped by a collision.


DEVELOPMENT OF AIR BAGS
The idea of using a rapidly inflating cushion to prevent crash injuries has a long history. The first patent on an inflatable crash-landing device for airplanes was filed during World War II.
Early efforts to adapt the air bag for use in cars bumped up against prohibitive prices and technical hurdles involving the storage and release of compressed gas.

• If there was enough room in a car for a gas canister.
• Whether the gas would remain contained at high pressure for the life of the car.
• How the bag could be made to expand quickly and reliably at a variety of operating temperatures and without emitting an ear-splitting bang.