Record Display for the EPA National Library Catalog


Main Title In-house test program report no. 2 : vehicle preconditioning: LA-4 vs. HFET /
Author 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 1975
Report Number Evap 75-5
Stock Number PB-270 365
OCLC Number 706131505
Subjects Air--Pollution--Measurement ; Motor vehicles--Pollution control devices
Additional Subjects Air pollution ; Automobiles ; Test facilities ; Evaporation ; Vehicles ; Methodology ; Fuel consumption ; Exhaust emissions ; Automobile engines ; Cycles ; Standards ; Dynamometers ; Preconditioning ; Evaporative emissions ; Highway fuel economy test ; Test vehicles ; Urban dynamometer driving schedule(LA 4)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELBD ARCHIVE EPA EVAP-75-5 AWBERC Library/Cincinnati,OH 11/21/2023
ELCD  EPA EVAP-75-5 NVFEL Library/Ann Arbor, MI 03/21/2011 DISPERSAL
NTIS  PB-270 365 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation [i], 19, [13] pages : illustrations, charts ; 28 cm
The purpose of this study was to determine whether or not the two Highway fuel economy test (HFET) cycles used for measuring fuel economy would be suitable for a preconditioning driving cycle in place of one urban dynamometer driving schedule (LA-4). The main concern with using the HFET was the possibility that the purge characteristics of the evaporative emission control system would allow for purging during preconditioning and not during the exhaust emission cycle which is essentially the same as an LA-4. If this were to occur then sufficient canister capacity would enable a vehicle to pass the evaporative emissions test, and the exhaust test would be easier to pass due to the fact that hydrocarbons from the canister would not be purging into the engine.
"November 1975." Includes bibliographical references (page 19). Cover title. At head of title: Technical Support for Regulatory Action. "Evap 75-5."