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The Influence of Disablement of Various Brakes on the Dry Stopping Performance and Stability of a Tractor-Semitrailer
- Ashley Dunn - SEA, Ltd ,
- C. Brian Tanner - SEA, Ltd ,
- Douglas R. Morr - SEA, Ltd ,
- Fawzi Bayan - SEA, Ltd ,
- Scott Noll - SEA, Ltd ,
- Eric Sauer - SEA, Ltd ,
- Anthony Cornetto - SEA, Ltd ,
- Alan Pearlman - SEA, Ltd ,
- Brian Boggess - SEA, Ltd ,
- John F. Wiechel - SEA, Ltd ,
- Dennis A. Guenther - The Ohio State University
ISSN: 1946-391X, e-ISSN: 1946-3928
Published April 20, 2009 by SAE International in United States
Citation: Dunn, A., Tanner, C., Morr, D., Bayan, F. et al., "The Influence of Disablement of Various Brakes on the Dry Stopping Performance and Stability of a Tractor-Semitrailer," SAE Int. J. Commer. Veh. 2(1):1-16, 2009, https://doi.org/10.4271/2009-01-0099.
This research was performed using a designed experiment to evaluate the loss of dry surface braking performance and stability that could be associated with the disablement of specific brake positions on a tractor-semitrailer. The experiment was intended to supplement and update previous research by Heusser, Radlinski, Flick, and others. It also sought to establish reasonable limits for engineering estimates on stopping performance degradation attributable to partial or complete brake failure of individual S-cam air brakes on a class 8 truck. Stopping tests were conducted from 30 mph and 60 mph, with the combination loaded to GCW (80,000 lb.), half-payload, and with the flatbed semitrailer unladen. Both tractor and semitrailer were equipped with antilock brakes. Along with stopping distance, brake pressures, longitudinal acceleration, road wheel speed, and steering wheel position and effort were also recorded. Relative stopping performance levels were comparatively analyzed for the three load conditions and effective deceleration degradation was analyzed for the various combinations of active brakes.