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Comparison of ATD and Driver Knee Positions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 20, 2009 by SAE International in United States
Annotation ability available
Contact between the knees and knee bolster commonly occurs in frontal collisions. The contact region on the bolster and the knee anatomy involved are related to the pre-crash positioning of the knees. The location of the distal (or infra-) patella was recorded on volunteers of widely varying stature after they had selected a comfortable driving position in mockups of three vehicles representing a large variation in size and shape: sedan, crossover SUV, and full-size pickup. On average, the right knees were grouped more tightly and were located more forward and lower than the left knees. On average, the knees were positioned 200 mm from the knee bolster for all subjects. The range of distance separating the distal patellae (within subject knee-to-knee distance) varied from 184–559 mm for all subjects for the three vehicles. Three adult Hybrid-III ATDs (small female, midsize male, large male) positioned in the test vehicles using the positioning protocol for crash testing (FMVSS 208) yielded positions that were reflective of the volunteers in two vehicles (sedan, pickup) in the fore-aft direction. For the remaining vehicle (crossover SUV), the ATD knees were forward of the subjects. In all cases, the ATD 208 position placed the knees closer together than the volunteers selected knee-to-knee distance. Maximally abducting the hips of the ATD revealed that it was possible to separate the knees to reflect the mean volunteer knee-to-knee distances.
CitationAtkinson, P., McCann, M., Reed, M., Srivastava, A. et al., "Comparison of ATD and Driver Knee Positions," SAE Technical Paper 2009-01-0390, 2009, https://doi.org/10.4271/2009-01-0390.
- NHTSA Traffic Safety Facts: 2005 Data DOT HS 810 623 2005
- Viano DC Restraint effectiveness, availability and use in fatal crashes: implications to injury control J Trauma 1995 Apr 38 4 538 46
- Roychoudhury RS Best MJ Conlee JK Schenck DP Blow-molded plastic active knee bolsters SAE paper 2004-01-0844 2004
- Schneider DW: Inflatable knee airbag US Patent 6,471, 242 2002
- Kitagawa Y Hasegawa J Yasuki T Iwamoto M Miki K A Study of Knee Joint Kinematics and Mechanics Using a Human FE Model SAE Paper 2005-22-0006 2005
- Chou C Fundamental principles for vehicle/occupant systems analysis AISI Vehicle crashworthiness and occupant protection 2004
- Human Accomodation and Design Devices Standards Committee: Devices for Use in Defining and Measuring Vehicle Seating Accommodation Standard SAE J826 2008
- Truck and Bus Human Factors Subcommittee: Truck driver shin-knee position for clutch and accelerator Standard SAE J1521 1998
- Philippart NL Roe RW Arnold AJ Kuechenmeister TJ Driver Selected Seat Position Model SAE paper 840508 1984
- Flannagan CC Manary MA Schneider LW An improved seating accommodation model with application to different user populations SAE paper 980651 1998
- Schneider LW Vogel M Bosio CA Locations of driver knees relative to knee bolster design Motor Vehicle Manufacturers Association 1988
- Culver CC Viano DC Influence of crush orientation on knee bolster function in barrier crash simulation SAE paper 800852
- Culver CC Viano DC Factors influencing knee restraint SAE paper 790322
- Federal Motor Vehicle Safety Standard 208 Occupant Crash Protection 2006
- Yoo JH Yi SR Kim JH The geometry of patella and patellar tendon measured on knee MRI Surg Radiol Anat 2007 Dec 29 8 623 8
- Schneider LW Anderson CK Olson PL Driver anthropometry and vehicle design characteristics related to seat positions selected under driving and non-driving conditions SAE paper 790384 1979