EPA Science Inventory

DEVELOPMENT OF ON-ROAD EMISSION FACTORS FOR HEAVY- DUTY VEHICLES

Citation:

Harris*, D B. AND F. G. King. DEVELOPMENT OF ON-ROAD EMISSION FACTORS FOR HEAVY- DUTY VEHICLES. In Proceedings, 1995 Diesel Engine Emissions Reduction Workshop, San Diego, CA, July 24 - 27, 1995. U.S. Department of Energy, Washington, DC, 6 p., (1995).

Description:

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 modal emissions model. The on-road test component uses an instrumented 45-ft (15-m) cargo van trailer to test various tractors during on-road operation according to a modal matrix. These results are compared to those obtained during actual runs over-selected routes. The experimental approach involves on-road tests that develop the modal 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. 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.

Purpose/Objective:

Proceedings Paper

URLs/Downloads:

Development of On-Road Emission Factors for Heavy-Duty Vehicles   (PDF,NA pp, 2085 KB,  about PDF)

Record Details:

Record Type: DOCUMENT (PAPER IN NON-EPA PROCEEDINGS)
Start Date: 07/24/1995
Completion Date: 07/24/1995
Record Last Revised: 04/17/2009
Record Created: 12/08/2004
Record Released: 04/02/2005
OMB Category: Other
Record ID: 128490

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

AIR POLLUTION PREVENTION AND CONTROL DIVISION