CORRELATION OF FUEL ECONOMY AND VEHICLE USE. SUBTASK V REPORT: ANALYSIS MEMORANDUM

The purpose of this analysis memorandum is to determine how changes in VMT level influence motor vehicle fuel economy. The question is framed in the context of the direct engineering correlation between fuel consumption rates (gpm) and average miles per day (AMPD), so that the analysis attempts to capture only the physical sensitivity to AMPD changes. The motivation for, and implementation of, data selection and screening procedures are described. The methodological framework of the analysis is developed also. Development of the correlation function is presented, beginning with an improved estimate of the AMPD component for the DOE regionalization study. The form of the correlation's temperature sensitivity is determined as an intermediate stage of the analysis and investigation of non-temperature effects is conducted. The final analysis produces a correlation function that is sensitive to ambient temperature, the average AMPD level of vehicle, and vehicle age. To illustrate the application of the gpm/AMPD correlation, a brief calculation based on estimating AMPD-standardized gpm values for analysis of in-use fuel economy shortfall is presented.

  • Supplemental Notes:
    • Portions are Illegible in Microfiche Products.
  • Corporate Authors:

    Energy and Environmental Analysis, Incorporated

    1111 North 19th Street
    Arlington, VA  United States  22209
  • Publication Date: 1982-10

Media Info

  • Pagination: 29 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00393696
  • Record Type: Publication
  • Report/Paper Numbers: DOE/NBM-4014199
  • Files: TRIS
  • Created Date: Jun 30 1985 12:00AM