Performance Simulation Study of Vehicle Engine Cooling System

The cooling system is an important subsystem of the engine, and its performance directly plays a key role in engine performance. In this paper, the vehicle cooling system model is built up with AMESim, which taken the CFD simulation results of the wind speed field and temperature field as input, to simulate the cooling system under the limit steady-state conditions such as low-speed and high-load, high-speed climbing, and NEDC transient conditions. We can calculate the water temperature rise curve of the transient condition, and balanced water temperature of steady-state conditions, and then compared with the test. The result verifies the correctness of the cooling system model. Simulation and test were carried out on a car with I-type radiator and U-flow radiator respectively. The final result shows that the I-type radiator is equipped with better cooling performance.