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Alternative Passenger Car Seat - Seat Belt Design for Crash Safety
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English
Abstract
This paper describes the method of incorporating a three point seat belt for the rear centre seat passenger in an Estate car. The necessary analyses were carried out to determine the load path through the belt, seat structure and the floor, highlighting the area to be redesigned. It was assumed that the 2/3 folding seat back would be supported in its upright position by the floor and the vehicle inner wall only. The support from the 1/3 seat back was ignored. The specifications are based on a very severe front crash and therefore represent the worst case.
The design, which is in both steel and composite material versions, complies with forward and rearward accelerations (16000N belt load) concerning the passenger, as well as 100kg of luggage. It also complies with a severe forward deceleration (21500N) related to the centre seat passenger. In the case of the 16000N, the deformation was limited to 100mm, whilst for the 21500N the requirement was ‘no material separation’. Occupant simulation was also carried out to study the effect of the strengthened seat and seat assembly on the occupant safety.
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Authors
Citation
Sadeghi, M. and Mellander, H., "Alternative Passenger Car Seat - Seat Belt Design for Crash Safety," SAE Technical Paper 880900, 1988, https://doi.org/10.4271/880900.Also In
References
- The Effect of Rear Seat Passengers on Front Seat Occupants in Frontal impacts Roberts A.K. TRRL Report No. 1079 1983
- Injury Reducing Effect of Seat Belts on Rear Seat Passengers North N. 8th ESV Conf. 1980