Trw Automotive Gmbh

Michael Stuetz

Wolfgang Holbein

Uwe Class

Artur Klein

Marc Arndt

A belt retractor for a safety belt system includes a frame, a belt reel rotatably mounted in the frame, a force limiter, a locking mechanism which couples the belt reel in a restraint case to the frame via the force limiter, and a belt webbing unwinding measuring means which includes a signal transmitter and at least one sensor. The sensor is associated with the signal transmitter and detects a change in a magnetic field. At least upon activation of the locking mechanism the signal transmitter is coupled to the belt reel such that it generates a signal upon rotation of the belt reel.

Belt retractor for a safety belt system and method of determining the belt webbing unwinding in a belt retractor

A belt retractor for a safety belt system has a belt spool and a belt webbing withdrawal measurement arrangement, which has a control disk, a magnetic sensor element and a magnetic cogwheel driven by the control disk and constructed as a separate part. In addition, a method is described to determine the belt webbing withdrawal in a belt retractor.

Belt retractor for a safety belt system and method to determine a belt webbing withdrawal in a belt retractor

A method for controlling an active restraint system in a motor vehicle includes providing of several status signals, transferring of the status signals to a control algorithm as input values, and controlling the active restraint system according to the result of the control algorithm. The method is characterized by checking whether one or more of the status signals have failed, reproducing a failed status signal, and replacing the failed status signal by its reproduction.

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Gschwend, Germany

Michael Stuetz