Laboratory emissions evaluations were performed on heavy-duty diesel and gasoline engines and vehicles. Results from using water injection (unstabilized macro-emulsion formed in the injection pump) on a heavy-duty diesel engine showed major reductions in particulate and NOx emissions, except during idle and light load conditions. Test work carried out on the heavy-duty gasoline engine running at high load confirmed that BaP emissions did exist, but that the levels emitted were low, and that they decreased with leaner f/a ratio. Selected maladjustments (simulating wear of inadequate maintenance) of the Cummins VTB-903 substantially increased HC, smoke and particulate emission levels. Maladjustments of the Detroit Diesel 6V-71N coach engine resulted in lower HC and NOx emission levels, but higher CO emissions, smoke, and particulate. Emissions over various chassis test cycles from three in-service transit buses proved to be highly variable from one bus to another. In addition, emissions from each bus were very test cycle-sensitive.
Emissions Characterization of Heavy-Duty Diesel and Gasoline Engines and Vehicles
1985
346 pages
Report
Keine Angabe
Englisch
Air Pollution & Control , Environment , Environmental Management & Planning , Exhaust emissions , Air pollution control , Particles , Nitrogen oxides , Hydrocarbons , Aldehydes , Buses , Carbon monoxide , Tables(Data) , Carbon dioxide , Concentration(Composition) , Performance evaluation , Heavy duty vehicles , Diesel engine exhaust , Air pollution detection , Federal test procedure
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