Record Display for the EPA National Library Catalog


Main Title Empirical Model of Vehicle Emissions.
Author Pitchford, M. ; Johnson, B. ;
CORP Author Nevada Univ., Las Vegas. Dept. of Chemistry.;Environmental Monitoring Systems Lab., Las Vegas, NV.;National Oceanic and Atmospheric Administration, Rockville, MD.
Publisher c1993
Year Published 1993
Report Number EPA/600/J-93/201;
Stock Number PB93-199602
Additional Subjects Air pollution monitoring ; Exhaust emissions ; Motor vehicles ; Hydrocarbons ; Carbon monoxide ; Measurement ; Emission factors ; Reprints ; Empirical models
Library Call Number Additional Info Location Last
NTIS  PB93-199602 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 10p
An empirical model that characterizes the relationship between equilibrium vehicle emission distributions and malfunction, repair, and replacement rates by splitting vehicles into two emission categories has been developed. Gross emitters and clean vehicles are defined by the magnitude of their emissions compared to an arbitrarily chosen cut point. The model is used to predict emission changes resulting from changes in any of the three rates, by determining the new equilibrium distribution of vehicles. The emission cut point for repair is shown to establish the cost per ton of reduction, and the maximum emission reduction limit (i.e., all vehicles in the clean category), while the frequency of repair determines the amount of emission reduction up to the cut-point determined limit. (Copyright (c) 1993 American Chemical Society.)