The paper discusses an EPA project the objectives of which are to: (1) define on-road emissions from heavy-duty diesel vehicles (HDDVs); (2) assess agreement between engine and chassis dynamometers and on-road emission factors; (3) evaluate current conversion factors for dynamometer data and develop appropriate ones if needed; and (4) develop a model emissions model. The experimental approach involves on-road tests that develop the model data necessary to model the emissions as a function of speed, load, grade, and acceleration. These data are fitted to routes representing trans-urban interstate travel, terminal entry/exit, and urban delivery. A final test sequence utilizes a certification cycle that has been adapted to suit actual truck operational capability to develop data for direct comparison with the dynamometer data.
Development of On-Road Emission Factors for Heavy-Duty Vehicles
1995
14 pages
Report
No indication
English
Air Pollution & Control , Reciprocation & Rotating Combustion Engines , Road Transportation , Heavy duty vehicles , Emission factors , Diesel engines , Trucks , Mobile pollutant sources , Engine dynamometers , Chassis dynamometers , Acceleration , Velocity measurement , Road slope , Driving style effect on exhaust emissions , Weight , Vehicle air pollution , Mathematical models , Reprints
On-Road Emission Factors for Heavy-Duty Diesel Vehicles
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