Σχόλια Αναγνωστών

Why didn't my air bag deploy in a crash?

από Gregorio Gwendolen (2020-03-08)


id="article-body" class="row" section="article-body"> Honda One of our viewers in New York, Gerald T., told me he is fascinated by crash-test videos but puzzled by the different ways airbags deploy in various cars, even when subjected to the exact same crash. The answer lies in the the brain of the airbag.

Squirrel EncounterThe Airbag Control Module is a hardened computer in your car with a single purpose: Decide when airbags need to be fired and get that signal to them.

CNET That brain is the Airbag Control Module, or ACM, a hardened computer in each car that keeps communicating with airbags even when the car around them is disintegrating. It gets constant motion data from a series of accelerometers around the vehicle and must decide if and when airbags should be deployed. If the answer is yes, it must be done during the key 20 milliseconds of what is only about a 100 millisecond impact. Talk about threading the eye of a needle.

Now playing: Watch this: Why air bags don't always deploy 4:09 But why airbags don't just deploy liberally in every impact comes down to three factors:


Prevent injuries and save lives: This is the main goal, of course, and airbags are said to prevent some 2,800 auto fatalities per year. But doing so requires the ACM software consider the nature of an impact, its direction and rotation, the crumple characteristics of the car its installed in, and the distance between each airbag and occupants. Its like taking an AP Calculus exam in a fraction of a second. The answer isn't just "deploy airbags" because of the next two factors:


Minimize airbag injuries: They are not completely benevolent devices and often cause their own fractures, bruises, and burns as they do their job. ACM programming is carefully tuned to only use them when the alternative is even worse.

If you have any concerns about exactly where and how to use doesn’t mean it’s our only game. We also repair damage on car doors and fenders. If you’re looking into minor auto body repairs in the Phoenix, you can call us at the webpage. Minimize airbag replacement costs: Airbags cost roughly $1,000 apiece and can only be used once. In some cases, airbag replacement can make up the lion's share of collision repair costs, so deploying them is not taken lightly otherwise a lot more cars would be totaled by insurers.

Many people are surprised that there isn't a standard airbag scheme used in every car, but that's because airbags are as smart as seat belts are dumb. Maybe we need a new bumper sticker:

Deploying airbags is like taking an AP Calculus exam in a fraction of a second with lives in the balance if you get one answer wrong.

CNET More From Roadshow 2018 Nissan Rogue Review: ProPilot Assist tech improves a winning formula 2018 Mazda6: The drivers' choice 2019 Acura NSX review: Hitting its stride Comments Cooley On Cars Roadshow Notification on Notification off Cars