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US 2004/0056471 A1Published application
Method for actuating a reversible belt pretensioner
AssigneeDaimlerChrysler AG
InventorsWilfried Bullinger, Walter Eberle
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AssigneeDaimlerChrysler AG
InventorsWilfried Bullinger, Walter Eberle
Estimating the term…
The invention relates to a method for actuating a reversible belt pretensioner for pretensioning a belt webbing, wound around a belt reel, of a seat belt in a motor vehicle, the belt pretensioner having a drive which acts on the belt reel. The seat belt has a locking device, acting on the belt reel in the unwinding direction, as a belt extraction lock. According to the invention, after the triggering of the belt pretensioner and when a predefinable condition is met, the belt pretensioner is actuated in such a way that the belt reel rotates at least to such an extent in the winding-up direction that the locking device of the belt reel opens and releases the belt webbing for unwinding.
Method for actuating a reversible belt pretensioner for pretensioning the belt webbing, wound around a belt reel, of a seat belt in a motor vehicle,
Method according to one of the preceding claims, characterized in that the belt pretensioner is actuated in such a way that when the belt webbing (13) is pretensioned and after the locking device (10, 11) opens, the belt webbing (13) is unwound from the belt reel (12) in such a way that a belt-webbing-sensitive sensor does not bring about the triggering of the belt extraction lock.
Method according to one of the preceding claims, characterized in that there is a drive for a seat adjustment means, and in that the seat adjustment means is actuated in such a way that the locking device (10, 11) can be opened by means of the belt pretensioner drive.
Method according to one of the preceding claims, characterized in that there is a drive for an adjustment device of the belt deflection roller and in that the adjustment device of the belt deflection roller is actuated in such a way that the locking device (10, 11) can be opened by means of the belt pretensioner drive.
Method according to one of claims 1, 2, 13, 14 or 15, characterized in that, when the belt pretensioner is actuated in order to open the locking device (10, 11), the regulation of the motor current in order to hold the belt reel in a predefinable position is carried out until it is detected that the locking device (10, 11) has opened.
Dependencies are inferred from the claim text.