Light-Duty Gasoline Hybrid-Electric and Conventional Vehicle Tailpipe Emissions Under Real-World Operating Conditions

This report summarizes the development of an on-board tailpipe emissions measurement system developed to compare the emissions and performance of two Toyota Camry model year 2010 gasoline-powered light-duty vehicles during real-world driving in Chittenden County, Vermont over multiple seasons. One vehicle, denoted as the “conventional vehicle” or CV, had a regular transmission and drivetrain powered solely by a 4-stroke gasoline internal combustion engine (ICE). The second Camry vehicle, denoted as the “hybrid-electric vehicle” or HEV, was powered by the traditional ICE in addition to the Toyota Synergy DriveR hybrid platform. To the authors' knowledge the study is the first to compare the emissions and performance of a HEV to its conventional counterpart of the same manufacturer and model design. Thus, the emissions and performance results of this study are important to evaluating the real world, in-use benefits of this HEV technology. Gas-phase and particle number emissions as well as fuel economy performance results are presented here by vehicle specific power (VSP) and Motor Vehicle Emissions Simulator (MOVES) operating model classification schemes to enable comparison to other studies.

  • Record URL:
  • Supplemental Notes:
    • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
  • Corporate Authors:

    University of Vermont, Burlington

    Transportation Research Center
    210 Colchester Avenue
    Burlington, VT  United States  05405-1757

    Research and Innovative Technology Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
  • Publication Date: 2014-6-30


  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 107p

Subject/Index Terms

Filing Info

  • Accession Number: 01531525
  • Record Type: Publication
  • Report/Paper Numbers: TRC Report 14-007
  • Contract Numbers: Project #025668
  • Created Date: Jul 24 2014 4:07PM