Record Display for the EPA National Library Catalog


Main Title Study of Models for the Prediction of Average Road Load of In-Use Delivery Trucks.
Author Cha, S. ; Sloan, R. L. ; Black, F. M. ;
CORP Author Northrop Services, Inc., Research Triangle Park, NC.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1983
Report Number EPA-68-02-2566; EPA-600/J-83-132;
Stock Number PB84-142421
Additional Subjects Trucks ; Roads ; Loads(Forces) ; Deceleration ; Statistical analysis ; Chassis ; Dynamometers ;
Library Call Number Additional Info Location Last
NTIS  PB84-142421 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 22p
Coast-down studies of Class 6 trucks (19,500 to 26,000 lb gross vehicle weight) were conducted at near-zero road grade and wind conditions. Speed-versus-time data were recorded, smoothed to a quadratic equation to calculate deceleration rates and reduced by the ordinary least-square method using two-, three-, and five-parameter linear models. The estimated parameters were analyzed statistically and compared to the U.S. Environmental Protection Agency (EPA) recommended procedure. The averages of the individual truck road loads for the two-, three-, and five-parameter models were consistent within 4% when reference conditions of 40 mi/h, 15,000 lb weight, and 65 ft sq. projected frontal area were used. (Copyright (c) 1983 Society of Automotive Engineers, Inc.)