SRS Seat Belt Tensioners

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Seat Belt Pretensioners

Seat Belt Pretensioners:

Pretensioners help optimize the performance of the airbag systems. Maintaining proper occupant position reduces the amount of work the airbags must perform, and thus increases the level of protection provided by the SRS system. Keeping the occupant in the proper position minimizes injury due to the rapid inflation of the airbags.

Seat Belt Pretensioner Types:

Seat Belt Pretensioner Types:

There are three types of seat belt pretensioners, electrical, mechanical, and pyrotechnic. The latest version is the pyrotechnic pretensioner, which use electrically triggered pyrotechnics that tighten the seatbelt upon sensing a crash event. These devices can operate on the buckle or ratchet side of the seatbelt mechanism.