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The Vehicle Engine Cooling System Simulation (VECSS) developed at Michigan Technological University in 1982 was enhanced to the extent that it can be used as a cooling system design tool for a heavy duty diesel truck. The enhancements are described in the present paper, while the use of the VECSS as a cooling system design tool is presented in the companion paper, “The Use of the Vehicle Engine Cooling System Simulation as a Cooling System Design Tool.” The enhanced VECSS was validated by comparing predicted temperature results to data collected by the Cummin's Engine Company during Air-to-Boil (ATB) tests, and during an “over-the-road” dynamic run of a heavy duty diesel truck. The enhanced model provided results which compared very favorably to both, the steady state ATB data and the dynamic “over-the-road” data.

Enhanced VECSS simulation program was tested for use as a cooling system design tool. The design parameters indicated in the study were varying fan type, fan speed, engine power rating, radiator style and air conditioning condenser. The predicted temperature results were compared to the experimental data, and were found to follow the measured trends, and in cases when the exact parameters were simulated, were found to match the temperature amplitudes.