ON-ROAD MOTOR VEHICLE EMISSIONS AND FUEL CONSUMPTION IN URBAN DRIVING CONDITIONS

This paper presents an analysis of on-road vehicle speed, emission, and fuel consumption data collected by 4 instrumented vehicles. Time-, distance-, and fuel-based average fuel consumption, as well as CO, HC, NO sub(x), and soot emission factors, were derived. The influences of instantaneous vehicle speed on emissions and fuel consumption were studied. It was found that the fuel-based emission factors varied much less than the time- and distance-based emission factors as instantaneous speed changed. The trends are similar to lab test results. The low driving speed contributed to a significant portion of the total emissions over a trip. The on-road data were analyzed using the modal approach. The 4 standard driving modes are idling, acceleration, cruising, and deceleration. It was found that the transient driving modes were more polluting than the steady-speed driving modes in terms of g/km and g/sec. Results indicated that on-road measurement is feasible in deriving vehicle emissions and fuel consumption factors in urban driving conditions.

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  • Corporate Authors:

    Air & Waste Management Association

    One Gateway Center, 3rd Floor, 420 Fort Duquesne Boulevard
    Pittsburgh, PA  United States  15222
  • Authors:
    • TONG, H Y
    • Hung, W T
    • Cheung, C S
  • Publication Date: 2000-4

Language

  • English

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Filing Info

  • Accession Number: 00798696
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 10 2000 12:00AM