| 摘要 |
A safety belt system for a motor vehicle includes a belt retractor ( 10 ). The belt retractor ( 10 ) includes a belt spool ( 14 ) and an electric motor ( 18 ). The belt spool ( 14 ) can be rotated by the electric motor ( 18 ) at least in a belt webbing winding direction. According to a first aspect, the electric motor ( 18 ) is coupled to the belt spool ( 14 ) without a clutch, and the belt retractor ( 10 ) further includes a retraction spring ( 24 ) which pre-tensions the belt spool ( 14 ) in the belt webbing winding direction. The pre-tensioning force of the retraction spring ( 24 ) is restricted to functionality in terms of comfort. According to a second aspect, the electric motor ( 18 ) is controlled by a control unit ( 20 ) coupled to the braking system of the vehicle. A method for controlling an electric motor ( 18 ) in a safety belt system makes provision that the electric motor ( 18 ) is activated in response to a braking process.
|
