Record Display for the EPA National Library Catalog


Main Title Prediction of Dynamometer Power Absorption to Simulate Light Duty Vehicle Road Load.
Author Thompson., Glenn D. ;
CORP Author Environmental Protection Agency, Ann Arbor, Mich. Standards Development and Support Branch.
Year Published 1977
Report Number LDTP-77-1;
Stock Number PB-272 169
Additional Subjects Dynamometers ; Test equipment ; Power ; Requirements ; Absorption ; Mathematical prediction ; Performance standards ; Equations ; Simulation ; Motor vehicles ; Road load characteristics
Library Call Number Additional Info Location Last
NTIS  PB-272 169 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 49p
This report uses the dynamometer power absorption information from the EPA technical support report 'Light Duty Vehicle Road Load Determination' (December 1976) to develop equations for predicting the small twin roll dynamometer power absorption necessary to simulate the road load of vehicles. The equations are developed by proposing model equations to predict the dynamometer power absorption, first based on vehicle weight, and then based on the vehicle reference frontal area. The reference vehicle frontal area based prediction system is then improved by separating vehicles into different classes and by including estimations of the effects of the total frontal area of the vehicle protuberances. It is concluded that the errors associated with this prediction system are twenty percent less than the errors associated with a prediction system based on the vehicle weight only.