Record Display for the EPA National Library Catalog


Main Title A guide to the emissions certification procedures for alternative fuel aftermarket conversions /
CORP Author USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States). ;Environmental Protection Agency, Washington, DC (United States).
Publisher National Renewable Energy Laboratory] ; [National Technical Information Service, U.S. Dept. of Commerce],
Year Published 1998
Report Number EPA 420-R-98-023; NREL/TP-540-22757; AC36-83CH10093
Stock Number DE98005092
OCLC Number 39340155
Subjects Natural gas vehicles--Pollution control devices--Certification--United States ; Motor vehicles--Motors--Modification--Certification--United States ; Motor vehicles--Motors--Exhaust gas--Standards ; Internal combustion engines, Spark ignition--Alternate fuels ; Air--Pollution--Law and legislation ; Automobiles--Fuel systems--Certification
Additional Subjects Vehicles ; Fuel Substitution ; Natural Gas ; Liquefied Petroleum Gases ; Certification ; Pollution Control Equipment ; Recommendations ; EDB/330700 ; EDB/330800 ; EDB/290300
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBM  TL228.G85 1998 Headquarters Library/Washington,DC 11/24/2014
ELCD  EPA 420-R-98-023 PDF file on file NVFEL Library/Ann Arbor, MI 07/15/2019
ELCM  TL228.G85 1998 3 Copies NVFEL Library/Ann Arbor, MI 03/21/2003
NTIS  DE98005092 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation vi, 61 pages : illustrations ; 28 cm
Emissions certification is still relatively new to the aftermarket vehicle conversion industry. Many in the industry think that as soon as a vehicle is converted to operate on compressed natural gas (CNG) or liquefied petroleum gas (LFG), it automatically runs as clean as or cleaner than it did on the conventional fuel. However, recent studies have shown that aftermarket conversions may not always reduce emissions. To achieve emissions benefits, the conversion equipment must be designed and calibrated specifically for the engine and emissions control system on which it has been installed, and the installation and setup must be performed so as to not adversely affect the vehicle's original emissions performance. The reason for certification, then, is to ensure that these criteria are met, that the vehicle continues to perform properly, and that it continues to satisfy all appropriate emissions standards throughout its useful life. The authors have prepared this guide to help equipment manufacturers, distributors, and installers understand the emissions certification process for aftermarket conversions. The guide gives an overview of the certification requirements established by the US EPA and by the state of California.
"January 1998." "U.S. Department of Energy (DOE), U.S. Environmental Protection Agency (EPA). Includes bibliographical references (pages 59-61).