Development and Verification of a Heavy Duty 42/14V Electric Powertrain Cooling System

Electronic thermal management reduces pump and fan power consumption through gains in controllability and efficiency, and also provides for additional control of heat rejection management and variable control of coolant, oil, and engine temperatures. This paper represents the design, bench testing, and wind-tunnel vehicle testing of an advanced system comprised of an electric pump, electronic water flow proportioning valve, 42V alternator, 36V starter, and an electronic control system which commands the performance of the valve, pump, and fan clutch in relation to the cooling demand on a 1999 Volvo VN tractor equipped with a Cummins N14 engine. System design and test data are compared from both the stock cooling system and the advanced thermal management system (ATMS).