Integrated motor retractor (IMR) with motion profiles
AssigneeKey Safety Systems, Inc.
InventorMartin Specht
Life of this patent
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Abstract
The invention relates to an active restraint system (1), comprising a seat belt retractor (3), having a frame (2) and a belt reel (4) with a belt webbing (10) wound thereon and rotatable supported by the frame (2) for allowing winding and unwinding the belt webbing (10). An electric disc motor (28) comprising a rotor (30) and a stator (32) is attached to the belt reel (4). The rotor (30) is directly attached by an attachment (31) to the belt reel (4). The restraint system further comprises a control unit (40) connected to the disc motor (28) and adapted to control the disc motor (28) to drive the belt reel (4) in accordance with a determined belt motion profile.
Claims20
An active restraint system, comprising:
- a seat belt retractor, having a frame and a belt reel with a belt webbing wound thereon and rotatably supported by the frame for allowing winding and unwinding the belt webbing,
- an electric disc motor comprising a rotor and a stator, the rotor being directly attached to the belt reel, and
- a control unit connected to the disc motor and adapted to control the disc motor to drive the belt reel in accordance with a determined belt motion profile.
Dependencies are inferred from the claim text.