Seat belts are your FIRST line of defense against injury in a crash.
Seatbelts work by limiting movement of the body, when your vehicle has a sudden change of speed or direction. They keep you positioned in your seat, so you don't bounce around or get thrown from your vehicle. This positioning is also what is used to increase the effectiveness of the Airbag.
Modern seatbelts use a three point anchorage system to accomplish this.
This is not a new development.
In 1958 a VOLVO
engineer developed this system.
The front lap belts are anchored on the door side of the floor of the vehicle and to the floor in the center of the car next to the seat back. Modern belts have the shoulder belt attached to the end of the buckle which runs up the side of the vehicle to an anchor point behind the front seat and contain a pretensioner. When you buckle up you pull the belt across your body
and insert the belt into the receiver in the middle of the car. Wearing your Seatbelts keeps you in the best position to benefit from the Airbag
when a collision occurs.
Pretensioners are incorporated into the belt assemblies to remove slack from the seat belt during a collision. Within milliseconds of a crash, the pretensioner is activated and increases the tension of the seat belt system around the occupant. This is what keeps you from bouncing around and keeps you in the proper position to benefit from the airbag if the crash is severe enough to trigger them. It contains an inertial reel with a pendulum device that senses sudden deceleration and automatically locks the belt in a crash. Currently there are three types of pretensioners in use today.
Post Collision Repair
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