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 (SAE)

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

Media Info

• Features: References;
• Pagination: 30 p.
• Serial:
  • Society of Automotive Engineers Preprint
  • Publisher: Society of Automotive Engineers (SAE)

Subject/Index Terms

• TRT Terms: Analysis; Applications; Combustion; Cooling systems; Data collection; Diesel engines; Fuel conservation; Fuel consumption; Fuel injection; High temperature; Statistical analysis; Tests; Turbochargers
• Old TRIS Terms: Analytical techniques; Combustion processes; Combustion technology; Diesel cooling; Direct-injection diesel engines; Turbocharged diesels
• Subject Areas: Data and Information Technology; Energy; Marine Transportation; Research;

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