Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Second by Second Exhaust Emissions Data Recorded during Federal Test Procedures UDDS Runs (for Microcomputers).
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher Apr 94
Year Published 1994
Report Number EPA/DF/DK-94/113;
Stock Number PB94-501780
Additional Subjects Exhaust emissions ; Automobile exhaust ; Software ; Data bases ; Diskettes ; Federal test procedure ; Dynamometers ;
Library Call Number Additional Info Location Last
NTIS  PB94-501780 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 11/11/1994
Collation 4 diskettes
Second by second emission data for 80 FTP (Federal Test Procedures) UDDS Runs on 13 vehicles are included. Product gives the results of analyses using real-time dynamometer test emissions data from 13 passenger cars to examine variations in emissions during different speeds or modes of travel. The resulting data provided a way to separately identify idle, cruise, acceleration, and deceleration emissions for examining how emissions differ by vehicle speed during the cruise mode. To select a set of vehicles for the study, the hydrocarbon (HC)/time relationship was established for several vehicles operating on summer-grade fuel. Federal Test Procedure results were then produced and examined to identify normal emitters (clean vehicles). After these vehicles were selected, their second-by-second emission characteristics were analyzed. The FTP runs for cold start, hot start, and hot stabilized emissions (Bags 1, 2, and 3 of the FTP) were performed for each of the four driving cycles-acceleration, deceleration, idling, and cruise-and the fraction of overall emissions contributed by each mode was computed for the warmed-up portion of the driving cycle. A protocol was then developed for review of the FTP real-time data. Study results showed significant emissions differences relating to the travel mode.