×

Occupant restraint system and occupant restraint method

  • US 20030114973A1
  • Filed: 12/12/2002
  • Published: 06/19/2003
  • Est. Priority Date: 12/14/2001
  • Status: Active Grant
First Claim
Patent Images

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.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×