Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Characterization of Emissions from Malfunctioning Vehicles Fueled with Oxygenated Gasoline-Ethanol (E-10) Fuel. Part 2.
Author Loomis, C. ; Pack, C. ;
CORP Author Clean Air Vehicle Technology Center, Inc., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. National Exposure Research Lab.
Publisher 2002
Year Published 2002
Report Number EPA/600/R-01/053;
Stock Number PB2002-107676
Additional Subjects Automotive fuels ; Air pollution control ; Fuel mixtures ; Exhaust emission control ; Ethanol fuels ; Hydrocarbons ; Carbon monoxide ; Nitrogen oxides ; Ozone ; Methanol fuels ; Vehicle air pollution ; Fuel composition ; Fuel properties ; Trends ; Particulates ; Motor vehicles ; Tests ; Oxygenates ; ETBE(Ethyl Tertiary Butyl Ether) ; MTBE(Methyl Tertiary Butyl Ether)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
NTIS  PB2002-107676 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 10/23/2002
Collation 42p
A 1993 Ford Taurus and a 1995 Chevrolet Achieva were tested using three different fuels: (1) a winter grade (E-10) fuel containing 10% (vol.) 200 proof ethanol, (2) a winter grade (WG) fuel without any oxygen containing compounds, and (3) a summer grade (SG) fuel without oxygenates. Vehicle emissions were characterized at test temperatures of 75 (SG fuel only), 20, 0, and -20 deg F. The vehicles were tested under two simulated malfunction modes: (1) the oxygen (O2 mode) sensor was disconnected and (2) the exhaust gas recirculating valve (EGR mode) was disconnected and plugged. The malfunction modes were not tested simultaneously. The vehicles were tested on the Urban Dynamometer Driving Schedule (UDDS) of the Federal Test Procedure (FTP). Four IM240 test cycles were run after each of the UDDS tests and the exhaust particulate matter (PM2.5 and PM10), from the four IM240 driving cycles were collected on single filters. The gaseous emissions were collected and analyzed for total hydrocarbons, carbon monoxide, oxides of nitrogen speciated (individual) hydrocarbons, speciated (individual) aldehydes, ethanol, methanol, 2-propanol, methyltertiarybutyl (MTBE) ether, and ethyltertiarybutyl (ETBE) ether. Hydrocarbon emissions generally increased as test temperature decreased for both vehicles, fuels, and test modes. The E-10 fuel reduced some emissions and increased others, while disconnecting the O2 sensor increased emissions over the other two modes. The trend for carbon monoxide and oxides of nitrogen emissions showed a general increase in emission rates as the testing temperature decreased. When the O2 sensor was disabled, the trend showed the increasing carbon monoxide emissions and when the EGR valve was disabled it was observed that the oxides of nitrogen emissions generally increased.