This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Comparison of Heavy Truck Engine Control Unit Hard Stop Data with Higher-Resolution On-Vehicle Data
- Fawzi P. Bayan - SEA, Ltd. ,
- Anthony D. Cornetto - SEA, Ltd. ,
- Ashley Dunn - SEA, Ltd. ,
- C. Brian Tanner - SEA, Ltd. ,
- Eric S. Sauer - SEA, Ltd. ,
- Brian Boggess - SEA, Ltd. ,
- Douglas R. Morr - SEA, Ltd. ,
- Rickey L. Stansifer - SEA, Ltd. ,
- Scott A. Noll - SEA, Ltd. ,
- Grant J. Heydinger - The Ohio State University ,
- 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: Bayan, F., Cornetto, A., Dunn, A., Tanner, C. et al., "Comparison of Heavy Truck Engine Control Unit Hard Stop Data with Higher-Resolution On-Vehicle Data," SAE Int. J. Commer. Veh. 2(1):29-38, 2009, https://doi.org/10.4271/2009-01-0879.
Engine control units (ECUs) on heavy trucks have been capable of storing “last stop” or “hard stop” data for some years. These data provide useful information to accident reconstruction personnel. In past studies, these data have been analyzed and compared to higher-resolution on-vehicle data for several heavy trucks and several makes of passenger cars. Previous published studies have been quite helpful in understanding the limitations and/or anomalies associated with these data. This study was designed and executed to add to the technical understanding of heavy truck event data recorders (EDR), specifically data associated with a modern Cummins power plant ECU. Emergency “full-treadle” stops were performed at many combinations of load-speed-surface coefficient conditions. In addition, brake-in-curve tests were performed on wet Jennite for various conditions of disablement of the braking system. This study shows how the ECU data compares to higher-resolution data acquired by independent data acquisition computers and transducers. The goal of this study was to help accident reconstruction professionals better understand engine ECU “hard stop” data currently available on most commercial vehicles.