THE EFFECTS OF AMBIENT TEMPERATURE AND VEHICLE LOAD ON A DIESEL POWERED TRUCK COOLING SYSTEM PERFORMANCE USING A COMPUTER SIMULATION PROGRAM

A computer simulation model to predict the thermal responses of an on-highway heavy duty diesel truck in transient operation was used to study several important cooling system design and operating variables. The truck used in this study was an International Harvester COF-9670 cab-over-chassis vehicle equipped with a McCord radiator, Cummins NTC-350 diesel engine, Kysor fan-clutch and shutter system, aftercooler, and standard cab heater and cooling system components. Input data from several portions of a Columbus to Bloomington, Indiana route were used from the Vehicle Mission Simulation (VMS) program to determine engine and vehicle operating conditions for the computer simulation model. The thermostat-fan, thermostat-shutter-fan, and thermostat-winterfront-fan systems were studied. Investigations were conducted for ambient temperatures of -10, 32, 85, and 100 deg F, full- and half-vehicle load (72,000 and 36,000 1bm Gross Vehicle Weight (GVW)), and alternate routes of operation utilizing recent improvements in the model. The results show that the thermostat-shutter-fan system provides the best cooling system performance in terms of coolant temperature control, minimization of fan and thermostat operation, and provides adequate cab comfort over the range of vehicle operation and ambient temperatures.

  • Availability:
  • Supplemental Notes:
    • Presented at the SAE Truck and Bus Meeting and Exposition Dearborn, Michigan, December 3-6, 1984.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Savonen, C L
    • Chiang, E C
    • JOHNSON, J H
  • Publication Date: 1984

Media Info

  • Features: Appendices; Figures; References;
  • Pagination: 20 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00399051
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: SAE 841710, HS-038 571
  • Files: HSL, USDOT
  • Created Date: Aug 31 1985 12:00AM