Record Display for the EPA National Library Catalog


Main Title Corrections for variations in test fuel properties /
Author Thompson, G. D.
CORP Author Environmental Protection Agency, Ann Arbor, MI. Standards Development and Support Branch.
Publisher U.S. Environmental Protection Agency, Office of Air and Radiation, Office of Mobile Sources, Emission Control Technology Division, Standards Development and Support Branch,
Year Published 1984
Report Number EPA-AA-SDSB-84-3
Stock Number PB85-131522
OCLC Number 789673149
Subjects Air--Pollution ; Motor vehicles--Motors--Exhaust gas ; Motor vehicles--Fuel consumption ; Automobiles--Fuel consumption ; Motor fuels--Research ; Fuel economy--Testing ; Fuel Economy Tests ; Vehicle Test Driving Schedules ; Vehicle Performance
Additional Subjects Exhaust emissions ; Fuels ; Tests ; Air pollution ; Fuel consumption ; Sources ; Air quality ; Procedures
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELBD ARCHIVE EPA AA-SDSB-84-3 AWBERC Library/Cincinnati,OH 12/27/2023
ELCD  EPA AA-SDSB-84-3 NVFEL Library/Ann Arbor, MI 04/30/2012 DISPERSAL
NTIS  PB85-131522 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 13 pages ; 28 cm
General Motors Corporation has recently asserted that the test fuel used at the Environmental Protection Agency (EPA) Motor Vehicle Emissions Lab. (MVEL) has varied in energy density and carbon content since 1975. General Motors has subsequently requested that a Corporate Average Fuel Economy (CAFE) correction be granted to account for these variations in fuel properties. General Motors has submitted data demonstrating that the test fuel used by GM has varied since 1975. Since EPA and GM obtain fuel from the same sources it is probable that the EPA test fuel has also varied in a similar fashion. If so, this is a change which would systematically affect the measured fuel economy of test vehicles and hence corporate average fuel economies (CAFE). This change is similar to previous test procedure changes for which CAFE corrections have been proposed. This report develops a simple correction based on the energy content per unit carbon of the fuel. The correction proposed by GM is also discussed, as is the problem of limited available data on the test fuels.
Includes bibliographical references (page 13). Technical report. "EPA-AA-SDSB-84-3." Cover title.