Trw Automotive Gmbh

Trw Occupant Restraint Systems Gmbh & Co. Kg

Martin Prokscha

Wolfgang Holbein

Artur Klein

Stefano Roehm

Nathalie Kramer

Alexander Heilig

Michael Bolz

Dieter Biller

A control () for a seat belt positioning device () includes a motor () for positioning a seat belt component (). A locking tongue sensor () generates a locking tongue signal (S) depending on whether a locking tongue is inserted in a belt buckle (). A trigger circuit () connected to the locking tongue sensor () generates a trigger signal (TR, TR, TR, VT, TM) in response to the locking tongue signal (S) A timer () or a motor load circuit () connected to the trigger circuit () generates a motor signal (M) having a predetermined period or depending on a motor load in response to the trigger signal (TR, TR, TR, VT, TM). A motor control circuit () connected to the timer () and the trigger circuit () turns the motor on and off in response to the motor signal (M). The direction of motion of the motor () is selected depending on the trigger signal (TR, TR, TR, VT, TM).

Controller for a seatbelt positioning device and seatbelt positioning device

The invention relates to a reversible belt tensioner () comprising a drive motor (), a spindle () connected to the drive motor (), a spindle nut () adapted to be displaced in axial direction () on the spindle (), a catch () the one end of which is connected to the spindle nut () and a belt buckle () connected to the other end of the catch (), wherein at least one of the following features prevents the spindle nut () from jamming during travel against block:

Reversible belt tensioner for vehicle occupant restraint systems

A friction coupling has a drive part, an output part, and a friction element which can transfer a friction moment between the drive part and the output part. A release element is provided which after a predetermined rotation angle of the friction coupling can act on the friction element so that a reduction of the friction moment occurs.

Friction coupling for a reversible belt tensioner

The invention relates to a belt buckle presenter for a seat belt system of a vehicle comprising a belt buckle which is coupled to a spindle drive () through force transmission means (), the force transmission means () including a locking member () which in normal operation is movable along a threaded spindle () of the spindle drive () in axial direction and in the case of restraint can be deformed by a restraining force acting on the belt buckle () so as to adopt a locking position in which the locking member () positively engages in the threaded spindle ().

Belt buckle presenter

A belt retractor for a safety belt system has a frame (), a belt reel () rotatably mounted in the frame () for receiving a belt webbing, a reversible belt tensioning unit with a motor (), an irreversible belt tensioning unit, and a coupling mechanism, by means of which the reversible belt tensioning unit can be coupled to the belt reel () and which can be deactivated and reactivated, the coupling mechanism being deactivated when the irreversible belt tensioning unit is activated and the coupling mechanism being reactivated after termination of the irreversible belt tensioning.

Belt retractor for a safety belt system

A belt retractor for a vehicle safety belt has a frame, a belt reel which is rotatably mounted in the frame, a locking mechanism which is adapted to block a rotation of the belt reel in an unwinding direction of the safety belt in a vehicle sensitive and/or seat belt sensitive manner and a pretensioning drive which is adapted to drive the belt reel in a wind up direction of the safety belt and in the unwinding direction. A locking means is provided which prevents a reverse rotation of the belt reel in the unwinding direction, after the pretensioning drive has driven the belt reel in the wind up direction and has thereby pretensioned the safety belt.

Belt retractor for a vehicle safety belt

An electric motor drives a belt spool of a seatbelt retractor in a vehicle using a micro-controller and a drive circuit that drives the electric motor. A plurality of PWM control signal sources are provided each of which has a trigger input and a control signal output. Each control signal source, upon application of a trigger pulse to its trigger input, provides on its control signal output a control pulse of a duration different from durations of control pulses of all other control signal sources. A set of motor control programs are permanently stored in the micro-controller. A program selection signal is sent to the micro-controller from a central sensor unit in the vehicle. Trigger pulses are sent by the micro-controller to the trigger inputs of the control signal sources. Particular ones of the control signal sources are selected for application of their signal outputs to the drive circuit in a control sequence defined by a selected control program.

Method and control circuit for driving an electric motor of a seatbelt retractor

A belt retractor for a vehicle safety belt comprises a rotatably mounted belt spool, a drive wheel coupled coaxially with the belt spool, an electric motor which can drive the drive wheel at a variable drive force, and an electronic control unit which can control the electric motor. The belt spool is rotatable to a limited extent with respect to the drive wheel and a sensor is provided that on rotation of the belt spool relative to the drive wheel generates a signal which is representative of the belt force acting in the safety belt and is supplied to the electronic control unit.

A belt retractor for a vehicle safety belt comprises a frame and a belt spool () which is rotatably mounted in the frame, and at least one locking toothing () which is connected with the belt spool. A first locking catch () and a second locking catch () are provided, which are supported on the frame and can engage into the at least one locking toothing (). The first locking catch () is able to swing about a point of rotation which is arranged such that with the first locking catch () guided into the locking toothing () a virtual line, which passes through a point of contact between the first locking catch () and the locking toothing () and stands perpendicularly on a tooth face in the point of contact, runs between the point of rotation and a rotation axis of the belt spool (). The second locking catch () is able to swing about a point of rotation which is arranged such that with the second locking catch () guided into the locking toothing (), a virtual line which passes through a point of contact between the second locking catch () and the locking toothing () and stands perpendicularly on a tooth face in the point of contact, runs on the side of the point of rotation facing away from the rotation axis of the belt spool ().

Growing community of inventors

Schwaebisch Gmuend, Germany

Martin Prokscha