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Main Title 1972-73 heavy-duty engine baseline program and NOx emission standard development : technical report /
Author Cox, {Timothy ; Diatchun, Zachary ; Nugent, Thomas ; Passavant, Glenn ; Ragsdale, Larry ;
Other Authors
Author Title of a Work
Cox, Timothy.
CORP Author Environmental Protection Agency, Ann Arbor, MI. Standards Development and Support Branch.
Publisher Standards Development and Support Branch, Emission Control Technology Division, Office of Mobile Source Air Pollution Control, Office of Air, Noise and Radiation, U.S. Environmental Protection Agency,
Year Published 1981
Report Number EPA-AA-SDSB-81-01 report; EPA-AA-SDSB-81-01A appendix; SDSB8101A appendix (as assigned by NSCEP)
Stock Number PB81-244030
OCLC Number 11956923
Subjects Engines--Standards--United States ; Combustion gases
Additional Subjects Air pollution ; Nitrogen oxides ; Standards ; Exhaust emissions ; Gasoline engines ; Regulations ; Heavy duty vehicles ; Clean Air Act Amendments of 1977
Internet Access
Description Access URL
Report EPA-AA-SDSB-81-01
Appendix A EPA-AA-SDSB-81-01A
Library Call Number Additional Info Location Last
ELBD ARCHIVE EPA AA-SDSB-81-01 AWBERC Library/Cincinnati,OH 01/17/2024
ELCD  EPA AA-SDSB-81-01 NVFEL Library/Ann Arbor, MI 05/04/2011 DISPERSAL
Collation 2 volumes ; 28 cm
The Environmental Protection Agency was mandated by the 1977 Clean Air Act Amendments to determine the statutory NOx emission standard for 1985 heavy-duty engines. The standard was to be based on a 75 percent reduction from the average measured emissions for uncontrolled (1972-73 model year) gasoline-fueled heavy-duty engines. To establish the amount of NOx emissions from the uncontrolled heavy-duty gasoline-fueled engines, ECTD began a baseline testing program. This program consisted of four sections: (1) engine procurement, (2) restorative maintenance, (3) testing the engine emission levels using the transient test procedure, and (4) determination of the average measured emissions. Twenty-six engines were tested with 73 valid tests to obtain the average NOx emissions. Based on the results of these emission tests, the average NOx emission level is 6.8 g/BHP-hr. The CAAA of 1977 calls for a 75 percent reduction in NOx emissions as the statutory emission standard; complying with this requirement the 75 percent reduction prescribed yields a heavy-duty engine NOx emission standard of 1.7 g/BHP-hr.
At head of title: Technical report. "March 1981." "EPA-AA-SDSB-81-01."
Contents Notes
Report -- Appendix A.