Do you know the history of air bag?


The air bag traces its origin to air-filled bladders outlined as early as 1941 and first patented in the 1950s. Early air bag systems

A typical driver's-side air bag fits neatly on the steering wheel column. In case of a collision, the crash sensor sends an electric spark to the inflator canister, setting off a chemical readion that produces nitrogen gas. The gas expands, inflating the air bag and protecting the driver.
A typical driver's-side air bag fits neatly on the steering wheel column. In case of a collision, the crash sensor sends an electric spark to the inflator canister, setting off a chemical readion that produces nitrogen gas. The gas expands, inflating the air bag and protecting the driver.
were large and bulky, primarily using tanks of compressed or heated air, compressed nitrogen gas (N 2 ), freon, or carbon dioxide (CO 2 ). Some of the early systems created hazardous byproducts. One particular system used gun-powder to heat up freon gas, producing phosgene gas (COCl 2 )—an extremely poisonous gas.

 

One of the first patents for automobile air bags was awarded to industrial engineer John Hetrick on August 18, 1953. Conceived by Hetrick after a near accident in 1952, the design called for a tank of compressed air under the hood and inflatable bags on the steering wheel, in the middle of the dash-board, and in the glove compartment to protect front seat occupants, and on the back of the front seat to protect rear seat passengers. The force of a collision would propel a sliding weight forward to send air into the bags. Many other inventors and researchers followed suit, all exploring slightly different designs, so that the exact technical trail from the early designs to the present system is impossible to note with certainty.

In 1968, John Pietz, a chemist for Talley Defense Systems, pioneered a solid propellant using sodium azide (NaN 3 ) and a metallic oxide. This was the first nitrogen-generating solid propellant, and it soon replaced the older, bulkier systems. Sodium azide in its solid state is toxic if ingested in large doses, but in automotive applications is carefully sealed inside a steel or aluminum container within the air bag system.

Since the 1960s, air bag-equipped cars in controlled tests and everyday use have demonstrated the effectiveness and reliability. The Insurance Institute For Highway Safety conducted a study of the federal government's Fatal Accident Reporting System using data from 1985 to 1991, and concluded that driver fatalities in frontal collisions were lowered by 28 percent in automobiles equipped with air bags. According to

Preparation of the propellant, the first step in air bag manufacture, involves combining sodium azide and an oxidizer. The propellant is then combined with the metal initiator canister and various filters to form the inflator assembly.
Preparation of the propellant, the first step in air bag manufacture, involves combining sodium azide and an oxidizer. The propellant is then combined with the metal initiator canister and various filters to form the inflator assembly.
another study conducted in 1989 by General Motors, the combination of lap/shoulder safety belts and air bags in frontal collisions reduced driver fatalities by 46 percent and front passenger fatalities by 43 percent.

 

In response to consumers' increased safety concerns and insurance industry pressure, the federal government has forced automobile manufacturers to upgrade their safety features. First, Department of Transportation (DOT) regulations require all cars, beginning with model year 1990, sold in the United States to be equipped with a passive restraint system. (passive restraint systems—requiring no activation by the occupant—involve the use of automatic seat belts and/or the use of air bags.) If car manufacturers choose an air bag, then regulations require only a driver' s-side system until model year 1994, when air bag-equipped cars must include passive protection on the passenger's side as well. A 1991 law requires driver and passenger air bags in all cars by the 1998 model year and in light trucks and vans by 1999.

Through this and previous blog, I believe you have know the operational principle of the air bag. And what's more, the most important thing I want to tell you is that choosing a suitable and safe air bag for you and your family. For recommendation, autojoy car seat cover is the best choice, because its unique is airbag compatible and its excellent outlooking. You can buy autojoy car seat covers from websiite: www.autojoygroup.com or amazon: https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dautomotive&field-keywords=autojoy


Leave a comment


Please note, comments must be approved before they are published