STATISTICAL APPROACH TO DETERMINING THE EFFECTS OF SPEED, LOAD, OIL AND COOLANT TEMPERATURE ON DIESEL ENGINE SPECIFIC FUEL CONSUMPTION

The engines use in the study were the Cummins VT-903 (turbocharged) and the Caterpillar 3208, both being direct-injection and four-cycle. The data were taken for the Cat 3208 engine using a fractional factorial statistical method which reduced the total test matrix from 256 to 64 data points. The experimental data are used in the development of BSFC regression equations as a function of load, speed, outlet coolant temperature and inlet oil temperatures. A mathematical parameter for expressing quantitatively the change of BSFC per 10 degree F change in coolant and oil temperature is presented. It was found that an increase in the coolant and/or oil temperatures had the effect of reducing BSFC in both engines.

  • Supplemental Notes:
    • Prepared for SAE Meeting Nov. 13-16 1978.
  • Corporate Authors:

    Society of Automotive Engineers

    400 Commonwealth Drive
    Warrendale, PA  USA  15096
  • Authors:
    • Yousry, M
    • JOHNSON, J H
    • PANDIT, S M
  • Publication Date: 1978

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00194816
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: SAE 780971
  • Files: TRIS
  • Created Date: Jun 30 1979 12:00AM