李寒寒，董方龙，刘井年，任利东，成敬敏

潍柴动力股份有限公司，山东 潍坊  261061

摘要：为提高整车热平衡能力，对某重型发动机风扇及冷却系统进行研究，分析风扇、冷却模块及整车布置对热平衡的影响，提出一种评估风扇性能差异的方法，通过优化改进风扇结构及分析整车风路布置的合理性，提高整车的高温适应能力。结果表明：在已有的整车热平衡试验数据基础上，通过理论分析及仿真计算方法评估其它工况点或其它风扇配置的整车热平衡结果，可将误差控制在4 ℃以内；优化风扇结构可以改善整车热平衡。该分析可以为研究整车冷却系统提供参考。

关键词：重型发动机；风扇；冷却模块；整车热平衡

Abstract：In order to improve the vehicle thermal equilibrium ability, the fan and cooling system of a heavy duty engine are studied,the effect of the fan, cooling module and the whole vehicle arrangement on heat balance have been analyzed,and a method of fan performance difference evaluation has been developed. The structure of the fan is improved, and the air path arrangement of the vehicle has been analyzed,the high temperature adaptability of the whole vechicle is improved. The results show that based on the existing thermal balance of the vehicle, the theoretical analysis and simulation of thermal balance at the other working conditions can predict the results in which the error could be controlled within 4℃;optimizing the fan structure can improve the heat balance of the whole vehicle.The analysis can provide reference for the research of vehicle cooling system.

Keywords:heavy duty engine; fan; cooling module;vehicle thermal balance