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Document Number | 9922 |
|---|---|
Primary Title | Study of Exhaust Emissions from Idling Heavy-Duty Diesel Trucks and Commercially Available Idle-Reducing Devices |
Author Name | Lim, H. |
Author Affiliation | U.S. Environmental Protection Agency, Washington, D.C. |
Published Date | 10/01/2002 |
Detailed Publish Date | October 2002 |
Page Count | 12 |
Document Type | REPORT |
Abstract | Heavy duty diesel truck idling contributes significantly to energy consumption in the United States. The EPA initiated a study to quantify long duration idling emissions and fuel consumption rates over a two year period. It performed 42 tests on nine class-8 trucks (model years ranging from 1980s to 2001). Two of those trucks were equipped with 11 hp diesel auxiliary power units (APUs), and one was equipped with a diesel direct fired heater (DFH). The APU powers electrical accessories, heating, and air conditioning, whereas the DFH heats the cab in lieu of truck idling. Results indicate that use of an APU can reduce idling fuel consumption by 50 to 80% and reduce NOx by 89 to 94%. The use of a DFH can reduce fuel consumption by 94 to 96% and reduce NOx by 99%. |
Report Number | EPA420-R-02-025 |
Copyright Status | N - Not copyrighted, |
Document Owner | H |
