某SUV车型转向机区域温度优化与验证

Optimization and Verification of Steering Box's Temperature on a SUV

某SUV车型在整车零部件温度试验中发现前副车架动力总成悬置和转向机区域温度偏高。通过建立整车外部(含发动机舱)仿真模型,进行车速分别为40 km/h和100 km/h的流场分析,判断为实施空气动力学措施——安装气坝带来的温度方面的不利影响。气坝的存在削弱了发动机底部护板开孔的导流降温功能。针对该问题提出了改进措施,将该区域的环境温度降低了10℃,并通过风洞试验验证了改进措施的有效性。

During the temperature test,a SUV was found temperature increased in the area of front-subframe powertrain mount and the steering gear.By establishing a simulation model of the vehicle(including the engine compartment),the vehicle exterior flow field were analyzed at the speed of 40 km/h and 100 km/h.The temperature increase was pointed to implement aerodynamic measures(installation of air dams).The air dam weakens the diversion and cooling performance of the opening on the bottom guard plate.In response to this problem,improvement measures are proposed,and the ambient temperature in the area is reduced finally by 10℃.The improvement measures are verified through wind tunnel tests.