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Vehicle Rollover Events: A Challenge for an Integrated Occupant Safety System
Technical Paper
2000-31-0017
Sector:
Event:
Airbag 2000
Language:
English
Abstract
Rollover accident is a complex event and the occupant kinematics
is often difficult to predict. Field accident data analysis of
crash events shows that the vehicular rollovers generates a broad
panorama of injuries including occupant(s) ejection resulting in a
higher risk of fatality and a higher probability of risk to suffer
severe injuries. This means an effective occupant protection system
needs to deal with many diverse requirements such as impact
minimization, impact cushioning and ejection prevention.
Our paper describes state-of-the-art sensing technologies and
corresponding injury countermeasures to help provide optimized
protection for both belted and unbelted occupants in a rollover.
Our integrated occupant safety system concept, which is the
"Collision Unavoidable" portion of the overall integrated
Safety System approach includes an array of sensors and predictive
algorithms for an early restraint activation decision while
considering "out-of-position" occupants. Selected
real-world roll conditions are reconstructed using math models to
understand design parameters to help minimize the possibility for
inadvertent restraint deployments. The discussion focuses on the
methodology of the crash and immunity evaluation leading to the
necessary and timely deployment of countermeasures including
airbags, seatbelt-pretensioners, load limiters and a family of
seatbelt-cinching devices.