Iyota Page 1 THE EFFECT OF OCCUPANT PROTECTION BY CONTROLLING AIRBAG AND SEATBELT

Recent research revealed that greater proportion of heavier male occupants and lighter female occupants sustain serious injuries in frontal crash. The cause is thought that the frontal occupant restraint systems are designed to minimize the injury risk for 50 h percentile occupant only, and its characteristics are not adjustable. In this study, vent hole area of the airbag and load limiter force of the seat belt were controlled according to occupant sizes, and the effect of occupant protection for different occupant sizes were evaluated. MADYMO 3D was used in this analysis, and evaluation was performed not only in the 5 , 50 , and 95 percentile occupant size dummies, but also in the various physiques occupant size dummies. The various physiques occupant size dummies were created using the physique scaling application of MADYMO. As a result, all size of occupant dummies, from 5 to 95 percentile occupant dummies were evaluated, and injury severity of those occupant dummies were described.