Seat belt retractor system
First Claim
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1. A method of controlling a seat belt retractor system for a motor vehicle having a vehicle safety system, the seat belt retractor system having a seat belt, a motor adapted to retract the seat belt, and first and second voltage sources adapted to power the motor, the method comprising:
- generating a first signal indicative of a state of charge of the second voltage source;
generating a second signal indicative of a status of the vehicle safety system; and
determining whether to provide power to the motor with the first voltage source or the second voltage source to retract the seat belt based on the first and second signals.
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Abstract
A seat belt retractor system and a method of controlling the seat belt retractor system. The seat belt is retracted at a faster rate when a threat is detected using a high-voltage generated by a local power source.
27 Citations
15 Claims
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1. A method of controlling a seat belt retractor system for a motor vehicle having a vehicle safety system, the seat belt retractor system having a seat belt, a motor adapted to retract the seat belt, and first and second voltage sources adapted to power the motor, the method comprising:
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generating a first signal indicative of a state of charge of the second voltage source; generating a second signal indicative of a status of the vehicle safety system; and determining whether to provide power to the motor with the first voltage source or the second voltage source to retract the seat belt based on the first and second signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of controlling a seat belt retractor system for a motor vehicle having first and second vehicle safety systems, the seat belt retractor system having a seat belt, a motor adapted to retract the seat belt, and a control circuit adapted to control voltage provided to the motor, the method comprising:
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generating first and second signals indicative of a status of the first and second vehicle safety systems, respectively; driving the motor at a first elevated voltage level to retract the seat belt at a first elevated rate when the first signal is indicative of potential injury to a vehicle occupant; and driving the motor at a second elevated voltage level to retract the seat belt at a second elevated rate when the second signal is indicative of a potential injury to a vehicle occupant. - View Dependent Claims (12, 13, 14, 15)
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Specification