Occupant restraint system and occupant restraint method
First Claim
1. An occupant restraint system, comprising:
- a seat belt tension application device that adjusts tension applied to a seat belt to restrain an occupant with the seat belt;
a longitudinal acceleration detector that detects a longitudinal acceleration occurring in a vehicle along a longitudinal direction;
a lateral acceleration detector that detects a lateral acceleration occurring in the vehicle along a lateral direction; and
a control device that controls the tension applied by the seat belt tension application device based upon a longitudinal acceleration detection value detected by the longitudinal acceleration detector and a lateral acceleration detection value detected by the lateral acceleration detector, wherein;
a two-dimensional map, with a deceleration (negative acceleration) occurring in the vehicle along the longitudinal direction set on a +side of one of two axes orthogonally intersecting each other in a two-dimensional coordinate system, an acceleration of the vehicle manifesting along the longitudinal direction set on a −
side of the one axis, an acceleration of the vehicle to a right set on a +side of the other axis in the two-dimensional coordinate system and an acceleration of the vehicle to a left set on a −
side of the other axis, is provided;
an operation decision-making threshold line, which forms one of a semi-elliptic shape and a polygonal shape, intersects the other axis on the +side at A, intersects the other axis on the −
side at −
A and intersects the one axis on the +side at +B satisfying B<
A, is set in a first quadrant and a second quadrant of the map; and
the control device engages the seat belt tension application device to apply the tension to the seat belt if a point on the map determined in conformance to the longitudinal acceleration detection value and the lateral acceleration detection value obtained as the vehicle decelerates is outside a range enclosed by the operation decision-making threshold line and the other axis.
1 Assignment
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Accused Products
Abstract
An occupant restraint system comprises a seat belt tension application device; a longitudinal acceleration detector; a lateral acceleration detector; and a control device that controls the tension applied by the seat belt tension application device based upon a longitudinal acceleration detection value and a lateral acceleration detection value and the control device engages the seat belt tension application device to apply the tension to the seat belt if a point on the map determined in conformance to the longitudinal acceleration detection value and the lateral acceleration detection value obtained as the vehicle decelerates is outside a range enclosed by the operation decision-making threshold line and the other axis.
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Citations
25 Claims
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1. An occupant restraint system, comprising:
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a seat belt tension application device that adjusts tension applied to a seat belt to restrain an occupant with the seat belt;
a longitudinal acceleration detector that detects a longitudinal acceleration occurring in a vehicle along a longitudinal direction;
a lateral acceleration detector that detects a lateral acceleration occurring in the vehicle along a lateral direction; and
a control device that controls the tension applied by the seat belt tension application device based upon a longitudinal acceleration detection value detected by the longitudinal acceleration detector and a lateral acceleration detection value detected by the lateral acceleration detector, wherein;
a two-dimensional map, with a deceleration (negative acceleration) occurring in the vehicle along the longitudinal direction set on a +side of one of two axes orthogonally intersecting each other in a two-dimensional coordinate system, an acceleration of the vehicle manifesting along the longitudinal direction set on a −
side of the one axis, an acceleration of the vehicle to a right set on a +side of the other axis in the two-dimensional coordinate system and an acceleration of the vehicle to a left set on a −
side of the other axis, is provided;
an operation decision-making threshold line, which forms one of a semi-elliptic shape and a polygonal shape, intersects the other axis on the +side at A, intersects the other axis on the −
side at −
A and intersects the one axis on the +side at +B satisfying B<
A, is set in a first quadrant and a second quadrant of the map; and
the control device engages the seat belt tension application device to apply the tension to the seat belt if a point on the map determined in conformance to the longitudinal acceleration detection value and the lateral acceleration detection value obtained as the vehicle decelerates is outside a range enclosed by the operation decision-making threshold line and the other axis.
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2. An occupant restraint system, comprising:
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a seat belt tension application device that adjusts tension applied to a seat belt to restrain an occupant with the seat belt;
a longitudinal acceleration detector that detects a longitudinal acceleration occurring in a vehicle along a longitudinal direction;
a lateral acceleration detector that detects a lateral acceleration occurring in the vehicle along a lateral direction; and
a control device that controls the tension applied by the seat belt tension application device based upon a longitudinal acceleration detection value detected by the longitudinal acceleration detector and a lateral acceleration detection value detected by the lateral acceleration detector, wherein;
an XY two-dimensional map, with a deceleration (negative acceleration) of the vehicle occurring along the longitudinal direction set on a +Y axis, an acceleration of the vehicle manifesting along the longitudinal direction set on a −
Y axis, an acceleration of the vehicle to a right set on a +X axis and an acceleration of the vehicle manifesting to a left set on a −
X axis, is provided;
a first operation decision-making threshold line, which forms one of a semi-elliptic shape and a polygonal shape, intersects the +X axis at A, intersects the −
X axis at −
A and intersects the +Y axis at +B satisfying B<
A, is set in a first quadrant and a second quadrant of the map; and
the control device engages the seat belt tension application device to apply the tension to the seat belt if a point on the map determined in conformance to the longitudinal acceleration detection value and the lateral acceleration detection value obtained as the vehicle decelerates is outside a range enclosed by the first operation decision-making threshold line and the X axis. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 24, 25)
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20. An occupant restraint system, comprising:
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a seat belt tension application device that adjusts tension applied to a seat belt to restrain an occupant with the seat belt;
a longitudinal acceleration detector that detects a longitudinal acceleration occurring in a vehicle along a longitudinal direction;
a lateral acceleration detector that detects a lateral acceleration occurring in the vehicle along a lateral direction; and
a control device that controls the tension applied by the seat belt tension application device based upon a longitudinal acceleration detection value detected by the longitudinal acceleration detector and a lateral acceleration detection value detected by the lateral acceleration detector, wherein;
an XY two-dimensional map, with a deceleration (negative acceleration) of the vehicle occurring along the longitudinal direction set on a +Y axis, an acceleration of the vehicle occurring along the longitudinal direction set on a −
Y axis, an acceleration of the vehicle to a right set on a +X axis and an acceleration of the vehicle to a left set on a −
X axis, is provided;
an operation decision-making threshold line, which forms a substantial semi-elliptic shape achieved by connecting a plurality of quadratic curves at a plurality of inflection points intersects the +X axis at A, intersects the −
X axis at −
A and intersects the +Y axis at +B satisfying B<
A, is set in a first quadrant and a second quadrant of the map; and
the control device engages the seat belt tension application device to apply the tension to the seat belt if a point on the map determined in conformance to the longitudinal acceleration detection value and the lateral acceleration detection value obtained as the vehicle decelerates is outside a range enclosed by the semi-elliptic operation decision-making threshold line and the X axis.
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21. An occupant restraint system, comprising:
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a seat belt tension application device that adjusts tension applied to a seat belt to restrain an occupant with the seat belt;
a longitudinal acceleration detector that detects a longitudinal acceleration occurring in a vehicle along a longitudinal direction;
a lateral acceleration detector that detects a lateral acceleration occurring in the vehicle along a lateral direction; and
a control device that controls the tension applied by the seat belt tension application device based upon a longitudinal acceleration detection value detected by the longitudinal acceleration detector and a lateral acceleration detection value detected by the lateral acceleration detector, wherein;
an XY two-dimensional map, with a deceleration (negative acceleration) of the vehicle occurring along the longitudinal direction set on a +Y axis, an acceleration of the vehicle occurring along the longitudinal direction set on a −
Y axis, an acceleration of the vehicle to a right set on a +X axis and an acceleration of the vehicle to a left set on a −
X axis, is provided;
an operation decision-making threshold line, which forms a polygonal shape achieved by connecting a plurality of sides at, at least, one inflection point intersects the +X axis at A, intersects the −
X axis at −
A and intersects the +Y axis at +B satisfying B<
A, is set in a first quadrant and a second quadrant of the map; and
the control device engages the seat belt tension application device to apply the tension to the seat belt if a point on the map determined in conformance to the longitudinal acceleration detection value and the lateral acceleration detection value obtained as the vehicle decelerates is outside a range enclosed by the polygonal operation decision-making threshold line and the X axis.
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22. An occupant restraint system, comprising:
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a seat belt tension application means for adjusting tension applied to a seat belt to restrain an occupant with the seat belt;
a longitudinal acceleration detection means for detecting a longitudinal acceleration occurring in a vehicle along a longitudinal direction;
a lateral acceleration detection means for detecting a lateral acceleration occurring in the vehicle along a lateral direction; and
a control means for controlling the tension applied by the seat belt tension application means based upon a longitudinal acceleration detection value detected by the longitudinal acceleration detection means and a lateral acceleration detection value detected by the lateral acceleration detection means, wherein;
a two-dimensional map, with a deceleration (negative acceleration) occurring in the vehicle along the longitudinal direction set on a +side of one of two axes orthogonally intersecting each other in a two-dimensional coordinate system, an acceleration of the vehicle occurring along the longitudinal direction set on a −
side of the one axis, an acceleration of the vehicle to a right set on a +side of the other axis in the two-dimensional coordinate system and an acceleration of the vehicle to a left set on a −
side of the other axis, is provided;
an operation decision-making threshold line connecting an intersecting point +A at which the other axis is intersected on the +side, an intersecting point −
A at which the other axis is intersected on the −
side and an intersecting point +B satisfying B<
A at which the one axis is intersected on the +side is set in a first quadrant and a second quadrant of the map; and
the control means engages the seat belt tension application means to apply the tension to the seat belt if a point on the map determined in conformance to the longitudinal acceleration detection value and the lateral acceleration detection value obtained as the vehicle decelerates is outside a range enclosed by the operation decision-making threshold line and the other axis.
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23. An occupant restraint method achieved by using a two-dimensional map, with a deceleration (negative acceleration) of a vehicle occurring along a longitudinal direction set on a +side of one of two axes orthogonally intersecting each other in a two-dimensional coordinate system, an acceleration of the vehicle occurring along the longitudinal direction set on a −
- side of the one axis, an acceleration of the vehicle to a right set on a +side of the other axis in the two-dimensional coordinate system and an acceleration of the vehicle to a left set on a −
side of the other axis, in which a semi-elliptic or polygonal decision-making threshold line intersecting the other axis on the +side at A, intersecting the other axis on the −
side at −
A and intersecting the one axis on the +side at +B satisfying B<
A is set, comprising;
detecting an acceleration of the vehicle occurring along the longitudinal direction;
detecting an acceleration of the vehicle occurring along the lateral direction; and
applying tension to a seat belt so as to restrain an occupant when a point on the map determined in conformance to a longitudinal acceleration detection value and a lateral acceleration detection value obtained as the vehicle decelerates is outside a range enclosed by the operation decision-making threshold line and the other axis.
- side of the one axis, an acceleration of the vehicle to a right set on a +side of the other axis in the two-dimensional coordinate system and an acceleration of the vehicle to a left set on a −
Specification