Seat belt device and seat belt device control method
First Claim
1. A seat belt device comprising:
- an obstacle detection portion that detects an obstacle in an area surrounding a vehicle;
a collision prediction portion that predicts a probability of a collision of the vehicle with the obstacle, based on a detection signal from the obstacle detection portion;
a pretensioner device that set with multilevel tensions retracting of a seat belt; and
a pretensioner control portion that controls, when the collision prediction from the collision prediction portion is received, an operation of the pretensioner device such that the seat belt is retracted prior to the collision at a tension in accordance with a collision prediction level determined by the collision prediction portion.
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Accused Products
Abstract
A seat belt device (1) including an obstacle detection portion for detecting an obstacle in an area surrounding a vehicle, a collision prediction portion (21) for predicting a probability of a collision between the vehicle and the obstacle based on a detection signal from the obstacle detection portion, a pretensioner device (40), and a pretensioner control portion (22) which controls, when a collision prediction is received from the collision prediction portion (21), the operation of the pretensioner device (40) such that seat belt is retracted prior to the collision. Multilevel tensions for retraction of the seat belt are set for the pretensioner device (40), and furthermore, the tension of the seat belt can be change by the pretensioner control portion (22) in accordance with a collision prediction level determined by the collision prediction portion (21).
31 Citations
19 Claims
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1. A seat belt device comprising:
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an obstacle detection portion that detects an obstacle in an area surrounding a vehicle;
a collision prediction portion that predicts a probability of a collision of the vehicle with the obstacle, based on a detection signal from the obstacle detection portion;
a pretensioner device that set with multilevel tensions retracting of a seat belt; and
a pretensioner control portion that controls, when the collision prediction from the collision prediction portion is received, an operation of the pretensioner device such that the seat belt is retracted prior to the collision at a tension in accordance with a collision prediction level determined by the collision prediction portion. - View Dependent Claims (2, 3, 4, 6, 7, 8, 9)
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5. A seat belt device comprising:
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a sudden braking detection portion that detects a state of sudden braking of a vehicle;
a pretensioner device that is set to one of a first tension in which a seat belt has a limited degree of slack which allows an occupant of a seat to move, and a second tension which is higher than the first tension and where a body of an occupant of a seat is restrained; and
a pretensioner control portion that controls an operation of the pretensioner device, such that the seat belt is retracted at the first tension when it is detected by the sudden braking detection portion that the vehicle is in a sudden braking state. - View Dependent Claims (16, 17, 18, 19)
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10. A seat belt control method comprising
detecting an obstacle in an area surrounding a vehicle; -
predicting a probability of the vehicle colliding with the obstacle;
determining a level of the predicted collision;
selecting a tension from among preset multilevel tensions at which a seat belt is retracted, in accordance with a result of the collision prediction level determination; and
retracting the seat belt at the selected tension prior to the collision. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification