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This article takes the cooling system of a certain vehicle model as the model, applies simulation tools to establish its cooling system and front cabin air side model, inputs boundary conditions such as flow resistance characteristics of each component, and completes the steady-state simulation calculation of the entire vehicle system under different working conditions. The results show that the flow rate of various components in the original plan's rated point, heating test condition, and idle condition has decreased compared to a certain model on the same platform under the same working condition. The temperature difference of the radiator and the flow rate of the air cooler do not meet the specification requirements. Suggest using optimization plan 4 to increase the water pump speed ratio to 1.23. In summer, the main radiator temperature rises by 10.6° C, and the flow rate of the gearbox oil cooler increases to 30.5L/min, which can meet the requirements of high-temperature environments. In winter, the temperature difference between liquid and air in the radiator is relatively large, which can meet the temperature difference of 12.4° C for heat dissipation. It is recommended to adopt this plan. In addition, to ensure the accuracy and reliability of the model and calculations, cooling system tests were conducted on an engine bench. The comparison between simulation calculation data and experimental data showed that the simulation calculation results had high reliability.
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