关键词: 轻型卡车；发动机；冷却系统；虚拟试验；仿真分析

Abstract: Test and simulation are two methods in the development process of engine cooling system. Both have their own advantages and disadvantages in the performance evaluation. This paper proposes a virtual test method combing simulation and preliminary test results to replace the actual test. The results show that，compared with model established by the normal simulation method, the deviation between simulation and test is reduced form 8%～11% to less than 2% in the performance evaluation of cooling system under specific working conditions.

Key words: Light truck; Engine; Cooling system; Virtual test; Simulation