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Rollout Deceleration of Modern Passenger Vehicles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 16, 2012 by SAE International in United States
Annotation ability available
Vehicle post-impact travel distances are often available to the accident reconstructionist. Energy dissipated after impact can be significant, and it is often necessary to account for this energy. The deceleration and energy dissipation experienced by a vehicle after a collision is dependent on many variables including tire rolling resistance, engine and drive-train resistance and aerodynamic drag. New technologies that significantly modify the traditional drive train, low rolling resistance tires, and new aerodynamic body designs affect vehicle deceleration, but associated data is not widely available. Roll-out tests were performed in which speed, acceleration and position measurements were made. Vehicles tested were equipped with hybrid (gasoline-electric) and standard engines, CVT (continuously variable transmission), manual and automatic transmissions, and two wheel and four-wheel drive. Results are presented to characterize the effect of vehicle speed, gear, and ignition status (engine on or off). The different measurement methodologies employed are compared for accuracy, repeatability and ease of use. A review of published vehicle decelerations is presented and compared to the data collected in the current series of tests. The applicability of this new deceleration data to a range of vehicles similar to those tested is discussed.
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CitationWhite, K., Merala, R., Desautels, D., and Ellis-Caleo, T., "Rollout Deceleration of Modern Passenger Vehicles," SAE Technical Paper 2012-01-0616, 2012, https://doi.org/10.4271/2012-01-0616.
- Descornet, Guy “Road-Surface Influence on Tire Rolling Resistance,” ASTM STP 1031 401 415 1990
- Tires and Passenger Vehicle Fuel Economy Transportation Research Board Special Report 286 2006
- Fricke, L.B. Baker, J.S. “Drag Factor and Coefficient Of Friction In Traffic Accident Reconstruction,” Traffic Accident Investigation Manual, Chapter Topic 862 Northwestern University Traffic Institute
- Roenitz, E. Happer, A. Johal, R. Overgaard, R. “Characteristic Vehicular Deceleration for Known Hazards,” SAE Technical Paper 1999-01-0098 1999 10.4271/1999-01-0098
- Williams, W. “Driver Behavior During the Yellow Interval,” Transportation Research Record Volume 644-Highway Capacity, Traffic Flow, and Traffic Control Devices 75 78 1977
- Homburger, W. “Deceleration Performance,” Transportation and Traffic Engineering Handbook Second 168 169 Institute of Transportation Engineers 1982
- Warner, C. Smith, G. James, M. Germane, G. “Friction Applications in Accident Reconstruction,” SAE Technical Paper 830612 1983 10.4271/830612
- Reust, T.J. “Deceleration Rates of Modern Passenger Vehicles During Straight Line Braking and Yaw Events.” Collision 1 2 20 29 2006
- Goudie, D. Bowler, J. Brown, C. Heinrichs, B. et al. “Tire Friction During Locked Wheel Braking,” SAE Technical Paper 2000-01-1314 2000 10.4271/2000-01-1314
- Cliff, W. Bowler, J. “The Measured Rolling Resistance of Vehicles for Accident Reconstruction,” SAE Technical Paper 980368 1998 10.4271/980368
- Fay, R. Robinette, R. Smith, J. Flood, T. et al. “Drag and Steering Effects from Tire Tread Belt Separation and Loss,” SAE Technical Paper 1999-01-0447 1999 10.4271/1999-01-0447
- Robinette, R. Deering, D. Fay, R. “Drag and Steering Effects of Under Inflated and Deflated Tires,” SAE Technical Paper 970954 1997 10.4271/970954
- Robinette, R. Fay, R. “Drag and Steering Effects From Disablements of Run Flat Tires,” SAE Technical Paper 2000-01-1316 2000 10.4271/2000-01-1316