Daimler Chrysler Ag

Daimler Ag

Markus Woldrich

Walter Eberle

Wilfried Bullinger

Rainer Justen

Guido Villino

Hans Roehm

Christian Michael Mayer

Wolfgang Hinrichs

Bernd Mammel

Kai Wustlich

Ralf Bogenrieder

Alfred Wagner

Christian Gruber

Hans Röhm

In a method for controlling the operation of a reversible belt retractor to release a belt extraction lock of a restraint belt in a motor vehicle, the lock can be activated by an acceleration sensor. After the belt retractor has been triggered as a consequence of a hazardous situation having been detected and after the hazardous situation has been recognized as being over, the operation of the belt retractor is controlled by a release signal at a release time in order to bring about the release of the belt extraction lock to shift it from a blocking state into a comfort-providing state. The release time is determined by a sensor model algorithm based on a model of the acceleration sensor from at least one variable characterizing the running dynamics.

Method for controlling the operation of a reversible belt retractor in a motor vehicle

The invention relates to a method for actuating a reversible vehicle occupant protection means in a motor vehicle having a driving state sensor system and a reversible vehicle occupant protection means. The reversible vehicle occupant protection means can be triggered before the collision time and as a result moved into an effective position. For this purpose, the driving state data are monitored with respect to a state of emergency braking, and when the state of emergency braking is detected the vehicle occupant protection system is actuated. In addition, a state of oversteering and a state of understeering are determined by the data processing device. The reversible vehicle occupant protection system is actuated when the data processing device detects the state of emergency braking and/or the state of oversteering and/or the state of understeering.

Method for actuating a reversible vehicle occupant protection means in a motor vehicle

Method for actuating a reversible belt pretensioner for pretensioning a belt webbing, unwound from a belt reel, of a seat belt in a motor vehicle, the belt pretensioner having a drive which acts on the belt reel, and the seat belt having, as a belt extraction lock, a locking device which acts on the belt reel in the unwinding direction and whose locking can be released only if the belt reel is rotated about a certain angle of rotation in the winding-on direction. After a triggering of the belt pretensioner caused by a hazardous situation and if a variable indicative of the belt force indicates a decrease in the belt force, an opening mode is initiated in which the belt pretensioner drive is actuated in order to open the blocking device in such a manner that, at the beginning of the opening mode, the belt reel rotates about the specific angle of rotation in the winding-on direction.

Method for actuating a reversible belt pretensioner

A method for actuating a reversible vehicle occupant protection device in a motor vehicle having a driving state sensor system and a reversible vehicle occupant protection device. The reversible vehicle occupant protection device can be triggered before the collision time and as a result moved into an effective position. For this purpose, the driving state data are monitored with respect to a state of emergency braking, and when the state of emergency braking is detected the vehicle occupant protection system is actuated. In addition, a state of oversteering and a state of understeering are determined by the data processing device. The reversible vehicle occupant protection system is actuated when the data processing device detects the state of emergency braking and/or the state of oversteering and/or the state of understeering.

Method for actuating a reversible passenger protection system in a motor vehicle

Method for actuating a reversible belt pretensioner for pretensioning a belt webbing, the belt pretensioner having a drive which acts on the belt reel, and the seat belt having, as a belt extraction lock, a locking device which acts on the belt reel in the unwinding direction and whose locking can be released only if the belt reel is rotated through a specific angle of rotation in the winding-on direction. After the triggering of the belt pretensioner, the drive of the belt pretensioner for opening the locking device is actuated in an opening mode such that firstly, in a winding-on phase, the belt reel rotates through the specific angle of rotation in the winding-on direction. In a subsequent holding phase, the drive of the belt pretensioner is actuated for a predefinable holding time Tsuch that the belt reel is held in its angular position.

A belt tightener of a seat belt in a vehicle, in particular a motor vehicle, is provided with a retracting spring in order to return the belt. A counterspring, which can be adjusted by a motor, is connected in parallel with the retracting spring in order to be able to reduce the tensile force of the belt for comfort considerations. The motor can also be connected in drive terms to the belt via a coupling arrangement to give reversible belt tightening.

Belt tightener

In a belt tensioner of a seat belt in a vehicle, in particular a motor vehicle, a retraction device, which is driven by a motor and has a retraction force that is controllable as a function of parameters, is provided for retracting the belt.

Belt tensioner

In a belt tensioner of a seat belt in a vehicle, particularly a motor vehicle, for the return movement of the belt, a return spring is provided which is able to be tensioned by a motor as a function of parameters. The motor may also be used for a reversible tightening of the belt.

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Ditzingen, Germany

Markus Woldrich