Administrator by China Associction for Science and Technology
Sponsored by China Society of Automotive Engineers
Published by AUTO FAN Magazine Co. Ltd.

Automotive Engineering ›› 2024, Vol. 46 ›› Issue (6): 1125-1136.doi: 10.19562/j.chinasae.qcgc.2024.06.019

Previous Articles    

Performance Study of Cooling System for a High-Power Heavy Truck Based on 1D/3D Coupled Simulation

Haojie Cheng1(),Yanda Ma1,Yakun Xu1,Yanxun Wu1,Liping Dong1,Zhenhua Yu2,Yilun Zhang3   

  1. 1.China National Heavy Duty Truck Group Automotive Research Institute,Jinan 250000
    2.China National Heavy Duty Truck Group,Jinan 250000
    3.China Automotive Engineering Research Institute,Tianjin 300000
  • Received:2023-12-13 Revised:2024-02-23 Online:2024-06-25 Published:2024-06-19
  • Contact: Haojie Cheng E-mail:haojie@tju.edu.cn

Abstract:

With the rapid development of the economy, the demand for high power commercial vehicle is growing. Higher engine power means higher heat dissipation, which causes bigger challenges to the matching of engine cooling system and the spatial layout of engine compartment. For a heavy commercial vehicle equipped with 600 horsepower engine, the vehicle thermal flow field and 1D model of engine cooling system are developed based on 1D/3D coupled simulation to investigate the effects of fan cover and deflector on the intake air flow rate and average air temperature of the radiator. Meanwhile, according to the engine thermal balance test data, the matching calculation of engine cooling system is completed and the vehicle thermal balance test verification is conducted. The results show that compared with a single-layer fan shield, the C-type fan shield generates lower turbulent kinetic energy, which can provide more airflow. When the speed ratio of the water pump drops from 2.2 to 1.8, the outlet temperature at the maximum torque point and power point is 99.2 and 96.2 ℃ respectively, which can meet the cooling demand and also reduce the energy consumption of water pump. In addition, the vehicle environment cabin test also verifies the accuracy of the simulation model and the C-type air shield can effectively reduce the water temperature of the cooling system under high torque conditions.

Key words: engine thermal balance, C-type fan shield, cooling system, deflector, pump energy consumption