Effect of Seat Belts Equipped with Pretensioners on Rear Seat Adult Occupants in High-Severity Rear Impact
Published January 14, 2008 by SAE International in United States
Annotation of this paper is available
This study provides a preliminary investigation of occupant kinematics for rear seat occupants involved in high-severity rear impacts. The effect of a seatbelts equipped with or without a pyrotechnic pretensioner on restraining the rear seat adult occupant was evaluated. Further, the study examined the result of the occupant's seating alignment by comparing a Nominal Seating Position (NSP) to an occupant whose torso would be rotated forward to be placed in a Moderately Displaced Position (MDP) prior to impact. A series of eight sled tests were performed using a deceleration sled subjected to a delta-V of 30 mph. Instrumented HIII 50th and 5th ATDs were positioned in the outboard, rear seating positions. The study found that pretensioners had little effect on the occupant kinematics of rear seat occupants in either the NSP or the MDP. But, there were marked differences in kinematic evaluations between the occupant seating alignment configurations. HIC 15, HIC 36, Ncf, Nte, Ntf, peak chest acceleration, and peak, resultant pelvis acceleration all increased when the occupant's torso was displaced forward prior to the rear impact.
CitationTavakoli, M., Brelin-Fornari, J., and Shetty, V., "Effect of Seat Belts Equipped with Pretensioners on Rear SeatAdult Occupants in High-Severity Rear Impact," SAE Technical Paper 2008-01-1488, 2008, https://doi.org/10.4271/2008-01-1488.
- NHTSA, “Traffic Safety Facts 2000”, National Highway Traffic Safety Administration, U.S. Department of Transportation, 2000
- Stephens G.D., Long, T.J., Blaisdell, D.M., “Energy Analysis of Automotive Seat Systems,” SAE 2000-01-1380, Society of Automotive Engineers Inc., Warrendale, Pa., 2000
- Viano, D.C., Role of Seat in Rear Crash Safety, Society of Automotive Engineers., Warrendale, Pa., 2002
- ITARDA, Traffic Statistics 1997, Institute for Traffic Accident Research and Data Analysis, May 1998
- NHTSA, “National Automotive Sampling System, Crashworthiness Data System, 1994-1996,” National Highway Traffic Safety Administration, U.S. Department of Transportation
- Saczalski K., Burton J., Lewis P., Saczalski T., Baray P., “Belt Integrated Vehicular Seat Rear Impact Studies”, Paper Number F2000G279, Seoul 2000 FISITA World Automotive Congress, Seoul, Korea, June 12-15, 2000.
- Saczalski K., Burton J., Lewis P., Saczalski T., Baray P., “Evaluation of Rear Impact Seat System performance Using a Combined Load Neck Injury Criteria and Hybrid III Surrogates”, Paper Number IMECE2991/AMD-25444, 2001 ASME International Mechanical Engineering Congress and Exposition, Nov. 11-16, 2001.
- Saczalski K., Burton J., Lewis P., Friedman K., Saczalski T., “Study of Seat System Performance Related to Injury of Rear Seated Children & Infants in Rear Impacts”, Paper Number IMECE2002-AMD-33517, 2002 ASME International Mechanical Engineering Congress and Exposition, Nov. 17-22, 2002.
- Viano, D.C., Parenteau, C.S., Prasad P., Burnett R., “Stiff Versus Yielding Seats: Analysis of Matched Rear Impact Tests”, SAE 2007-01-0708, Society of Automotive Engineers, Warrendale, PA, 2007.
- Frieder, R.S., Kumar S., “Computer Analysis of Injuries to Rear Seat Child Occupants Restrained Using a Shared Lap/Shoulder Belt”, SAE 2007-01-2513, Society of Automotive Engineers, Warrendale, PA, 2007.
- Hoffman J., Suzuki S., Sakamoto M., Hayakawa K., “Application of Rear Head Airbag to Mitigate Rear Impact Injuries”, Proceedings of the 20th ESV Conference, Lyon, France, Paper No. 07-0315, 2007.
- Viano, D.C., Olsen S., Locke, G.S., Humer M., “Neck Biomechanical Responses with Active Head Restraints: Rear Barrier Tests with Biorid and Sled Tests with Hybrid III”, SAE 2002-01-0030, Society of Automotive Engineers, Warrendale, PA, 2002.
- Kim A., Anderson, K.F., Berliner J., Hassan J., Jensen J., Mertz, H.J., Pietsch H., Rao A., Scherer R., Sutterfield A., “A Biofidelity Evaluation of the Biorid II, Hybrid III and Rid2 for Use in Rear Impacts”, SAE 2003-22-0022, Society of Automotive Engineers, Warrendale, PA, 2003.
- Yaguchi M., Ono K., Kubota M., Matsuoka F., “Biofidelity and Evaluation of the Dummies for Rear Impact Tests”, SAE 2006-08-0062, Society of Automotive Engineers, Warrendale, PA, 2006.
- Ishii M., Ono K., Kubota M., “Factors Influencing the Repeatability and Reproducibility of the Dummies Used for Rear-End Impact Evaluation”, SAE 2006-08-0063, Society of Automotive Engineers, Warrendale, PA, 2006.
- “Repeatability and Reproducibility of Dummies Used for Rear-End Impact Evaluation-Based on the Different Dummy Design and the Interaction Between Dummy's Head/Neck/Torso and Seat System”, SAE 4-28-2-251, Society of Automotive Engineers of Japan, Inc., Tokyo, Japan, 2007.
- Zellmer H., Muser M., Stamm M., Walz F., Hell W., Langwieder K., Philippens M., “Performance Comparison Of Rear Impact Dummies: Hybrid III (Trid), Biorid And Rid2”, SAE 2002-13-0021, Society of Automotive Engineers, Warrendale, PA, 2002.
- Shetty V., “Effect of Seat Belts Equipped With Pretensioners on Rear Seat Adult Occupant in High-Severity Rear Impact”, Masters Thesis, Kettering University, 2007.
- Eppinger R., Sun E., Bandak F., Haffner M., Khaewpong N., Maltese M., Kuppa S., Nguyen T., Takhounts E., Tannous R., Zhang A., Saul R. Development of Improved Injury Criteria for the Assessment of Advanced Automotive Restraint Systems - II. November, 1999, The National Highway Traffic Safety Administration.
- Trauma.org. Abbreviated Injury Scale. Accessed on August 22, 2006. http://www.trauma.org/scores/ais.html.