Record Display for the EPA National Library Catalog


Main Title In-house test program report no. 4 : typical vehicle diurnal /
Author Wilson, Gary M. ; Rarick., Thomas
Other Authors
Author Title of a Work
Rarick, Thomas.
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 1976
Report Number EVAP 76-3
Stock Number PB-270 690
OCLC Number 706131091
Subjects Air--Pollution--Measurement ; Motor vehicles--Pollution control devices
Additional Subjects Air pollution ; Automotive fuels ; Evaporation ; Data acquisition ; Tests ; Diurnal variations ; Temperature ; Motor vehicles ; Fuel systems ; Fuel tanks ; Simulation ; Losses ; Comparison ; Methodology ; Evaluation ; Hydrocarbons ; Heating ; Evaporative emissions ; Test methods
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELBD ARCHIVE EPA EVAP-76-3 AWBERC Library/Cincinnati,OH 12/20/2023
ELCD  EPA EVAP-76-3 NVFEL Library/Ann Arbor, MI 03/21/2011 DISPERSAL
NTIS  PB-270 690 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation [ii], 33, [25] pages : illustrations, charts ; 28 cm
A diurnal breathing loss test is defined in the Federal Register as 'fuel evaporative emissions as a result of the daily range in temperature to which the fuel system is exposed.' In the case of diurnal evaporative losses, this situation is simulated in the Federal Test Procedure by artificially heating the fuel tank (and indirectly the fuel itself) over a one hour period, such that the tank fuel undergoes a temperature excursion from 60 to 84F. The report researches what is presently known about these three aspects of fuel tank diurnal losses and compares them with the current test procedure. An evaluation of the important differences between a real-life diurnal and a simulated test procedure is made using data gathered from an instrumented fuel tank. This report primarily focuses on the mechanisms involved in the evolution of hydrocarbon vapors from a vehicle fuel tank.
"October, 1976." Includes bibliographical references (page 33). Cover title. At head of title: Technical Support for Regulatory Action. "EVAP 76-3."