This interim report presents the results of the first phase of a two-part program to investigate methods of improving fuel consumption and reducing exhaust emissions for in-service diesel engines used as prime movers in locomotives and several classes of Coast Guard vessels. The engines are large, medium-speed units with individual cylinder displacements in excess of 150 cubic inches and power ratings from 2000 to 4000 brake horsepower. The study that is the subject of this report uses information that was obtained from the technical literature and from interviews of engine manufacturers, railroads, and engineering staffs of Coast Guard vessels. Several methods were investigated for their potential to reduce fuel consumption and emissions, within the constraint of maintaining adequate locomotive and vessel operating flexibility and engine life. These methods included the retrofit of engines with existing state-of-the-art components (e.g., injectors, governor, turbocharger) of improved design, the adjustment of injection timing, and changes in engine operating modes (speed-power points). The effects of engine wear and maintenance on fuel consumption and emissions were investigated, as were the effects of ambient air properties (temperature, pressure, humidity).

  • Supplemental Notes:
    • Also pub. as Coast Guard Report no. CG-D-124-75.
  • Corporate Authors:

    Southwest Research Institute

    Department of Engine and Vehicle Research
    San Antonio, TX  United States  78284

    Transportation Systems Center

    55 Broadway, Kendall Square
    Cambridge, MA  United States  02142

    United States Coast Guard

    Office of Research and Development, 400 7th Street, NW
    Washington, DC  United States  20590

    Office of Systems Development and Technology

    Department of Transportation, 400 7th Street, SW
    Washington, DC  United States  20590
  • Authors:
    • Storment, J O
    • Wood, C D
    • Mathis, R J
  • Publication Date: 1975-9

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 118 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00093593
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: DOT-TSC-OST-75-41, DOT-TSC-USCG-75-2
  • Contract Numbers: CN-DOT-TSC-920
  • Files: NTIS, TRIS
  • Created Date: Feb 4 2003 12:00AM