Toyota Promise Pre-tensioners and Force Limiters

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Pre-tensioners and Force Limiters

Seatbelts are the most basic restraining device for protecting vehicle occupants in the event of a collision.

Pre-tensioners instantaneously cinch the seatbelt when a strong impact is sensed during a front collision, thereby quickly restraining the occupant.

Force limiters slowly release the tension on the seatbelt to reduce force applied to the chest.

Combined, these devices help reduce impact applied by the seatbelt to the chest while reducing the distance the occupant's chest moves in a collision.