Design and Function of the Electric Motor Driven Reel: Notes

The electric motor driven reel is an extension of the functions of the existing automatic reel. The F01/F02 front automatic seat belt reels are also equipped with a pyrotechnic devices that operate the adaptive force limiters, as on E65/E66. The adaptive force limiters work independently from the (EMA) electric motor driven reels.

The electric motor driven reel essentially consists of an electric motor, a drive unit and a coupling, which establishes the connection to the automatic reel.

Fig 1: Identifying Electric Motor Driven Reel Components

Courtesy of BMW OF NORTH AMERICA, INC.