Record Display for the EPA National Library Catalog


Main Title Prediction of vehicle reference frontal area /
Author Goodall, Harriet W. ; Thompson., Glenn D.
Other Authors
Author Title of a Work
Thompson, Glenn D.
CORP Author Environmental Protection Agency, Ann Arbor, Mich. Standards Development and Support Branch.
Publisher U.S. Environmental Protection Agency, Office of Air and Waste Management, Office of Mobile Source Air Pollution Control, Emission Control Technology Division, Standards Development and Support Branch,
Year Published 1977
Report Number LDTP-77-7
Stock Number PB-276 541
OCLC Number 713646464
Subjects Automobiles--Motors--Exhaust gas ; Roads--Riding qualities ; Dynamometer ; Vehicle Emissions
Additional Subjects Dynamometers ; Exhaust emissions ; Air pollution ; Chassis ; Regression analysis ; Numerical analysis ; Fuel consumption ; Vehicle reference frontal area ; Vehicle road loads
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELBD ARCHIVE EPA LDTP-77-7 AWBERC Library/Cincinnati,OH 01/17/2024
ELCD  EPA LDTP-77-7 2 copies NVFEL Library/Ann Arbor, MI 04/25/2011 DISPERSAL
NTIS  PB-276 541 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 7, [5] pages : illustrations, charts ; 28 cm
Beginning with the 1979 model year, the dynamometer power absorption to simulate the vehicle road load during exhaust emission certification testing and fuel economy measurements will be predicted by the vehicle reference frontal area. This report develops an equation to estimate the vehicle reference frontal area using the overall vehicle height and width. The reference area data and the overall height and width data used in this analysis were supplied by the vehicle manufacturers. It is concluded that the product of the overall vehicle height, width and the coefficient, 0.80, yields a good approximation of the actual vehicle reference frontal area. Using this approximation, there is 80 percent confidence that the predicted value will be within plus or minus 1.0 square feet of the actual reference frontal area. This is approximately 5 percent of the reference area of a typical vehicle. This equation is recommended as a method for evaluation of submitted reference area data or for predicting vehicle reference frontal areas when empirical data are not available.
Cover title. "November 1977." At head of title: Technical Support Report for Regulatory Action." "LDTP-77-7 Includes bibliographical references (page 8).