Seat belt apparatus for vehicle
First Claim
1. A seat belt apparatus for a vehicle comprising:
- a first belt retractor which can retract a seat belt of the vehicle, and which permits the retracted seat belt to be pulled out;
a second belt retractor which can retract the seat belt of the vehicle, and which prohibits the retracted seat belt from being pulled out;
a movement state quantity detector which detects a movement state quantity of the vehicle that indicates a possibility of rollover of the vehicle;
a first belt retracting controller which determines that the vehicle will roll over and controls the first belt retractor such that the first retractor retracts the seat belt when the movement state quantity detected by the movement state quantity detector satisfies a predetermined first determination condition; and
a second belt retracting controller which determines that the vehicle will roll over and controls the second belt retractor such that the second belt retractor retracts the seat belt when the movement state quantity detected by the movement state quantity detector satisfies a predetermined second determination condition that indicates a higher possibility of rollover of the vehicle than the predetermined first determination condition.
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Accused Products
Abstract
In the seat belt apparatus of the invention, a belt retracting motor is operated so as to retract the seat belt by a predetermined amount when it is determined that the vehicle will roll over based on a lateral acceleration, a roll rate and a roll angle which are detected and calculated by a lateral acceleration sensor and a roll rate sensor, according to a predetermined first determination condition. Also, a pretensioner is operated so as to retract the seat belt by a predetermined amount when it is determined that the vehicle will roll over according to a second determination condition indicating that there is a higher possibility of rollover. When it is determined that the vehicle will not roll over, operation of the belt retracting motor is cancelled, and the seat belt is permitted to be pulled out.
25 Citations
12 Claims
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1. A seat belt apparatus for a vehicle comprising:
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a first belt retractor which can retract a seat belt of the vehicle, and which permits the retracted seat belt to be pulled out;
a second belt retractor which can retract the seat belt of the vehicle, and which prohibits the retracted seat belt from being pulled out;
a movement state quantity detector which detects a movement state quantity of the vehicle that indicates a possibility of rollover of the vehicle;
a first belt retracting controller which determines that the vehicle will roll over and controls the first belt retractor such that the first retractor retracts the seat belt when the movement state quantity detected by the movement state quantity detector satisfies a predetermined first determination condition; and
a second belt retracting controller which determines that the vehicle will roll over and controls the second belt retractor such that the second belt retractor retracts the seat belt when the movement state quantity detected by the movement state quantity detector satisfies a predetermined second determination condition that indicates a higher possibility of rollover of the vehicle than the predetermined first determination condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A seat belt apparatus for a vehicle, comprising:
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a first belt retractor which can retract a seat belt of the vehicle, and which permits the retracted seat belt to be pulled out;
a second belt retractor which can retract the seat belt of the vehicle, and which prohibits the retracted seat belt from being pulled out;
a movement state quantity detector which detects a movement state quantity of the vehicle that indicates a possibility of rollover of the vehicle;
a first belt retracting controller which determines that the vehicle will roll over and controls the first belt retractor such that the first retractor retracts the seat belt when the movement state quantity detected by the movement state quantity detector satisfies a predetermined first determination condition; and
a second belt retracting controller which determines that the vehicle will roll over and controls the second belt retractor such that the second belt retractor retracts the seat belt when the movement state quantity detected by the movement state quantity detector satisfies a predetermined second determination condition after the first belt retracting controller determines the possibility of rollover of the vehicle. - View Dependent Claims (12)
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Specification