Record Display for the EPA National Library CatalogRECORD NUMBER: 9 OF 9
|Main Title||Vehicle Testing to Determine Feasibility of Emission Inspection at Altitude.|
|Author||Liljedahl, Douglas R. ; Porter., Harold E. ;|
|CORP Author||Automotive Testing Labs., Inc., Aurora, Colo.;Environmental Protection Agency, Washington, D.C.|
|Stock Number||PB-255 276|
|Additional Subjects||Motor vehicles ; Exhaust emissions ; Air pollution abatement ; Altitude ; Technology transfer ; Measurement ; Elevation ; Reduction ; Statistical data ; Hydrocarbons ; Nitrogen oxides ; Carbon monoxide ; Cost analysis ; Correlations ; Tests ; Inspection ; Feasibility ; Automobiles ; Colorado ; Comparison ; Factor analysis ; High altitude areas ; Engine idle data ; Motor vehicle inspection ; Motor vehicle maintenance|
A laboratory study was conducted on 1968-1972 model vehicles at altitude to evaluate vehicle emission reduction concepts investigated and applied at lower elevations. Since vehicle exhaust hydrocarbons and carbon monoxide emissions are intrinsically high at higher elevations, it was suspected that emission reducing strategies might not prove significantly beneficial at higher elevations. Furthermore, emission reduction factors by engine maintenance are not defined. The study quantitatively defined hydrocarbon, nitrogen oxides, and carbon monoxide emission reduction. Direct maintenance cost was determined. Key mode and idle emission inspection concepts are discussed.