Abstract:Some hypotheses were proposed to analyze engine cooling system according to its structure and operating process. Lumped parameter method was used to build a mathematical model for engine electronic-control cooling system on those hypotheses. Then simulation of engine warming up and experimental verification were implemented, and the results showed that the model was reasonable. Furthermore, numerical simulation of engine coolant temperature control system was conducted. Finally, optimal design method of energy consumption in the case of heat transfer steady state was discussed.