As an emerging technology improving fuel consumption, active grille shutter (AGS) has been applied in engine cooling system. For the reason of unreasonable matching method of grille opening and cooling fan, the problem of engine overcooling is widespread. As components with similar function of adjusting cooling air flow, the AGS and the cooling fan are separated from each other in parameter matching and operation which reduce cooling efficiency and fuel economy. To achieve precise cooling and improve fuel economy, a joint control strategy for AGS and cooling fan was proposed by using computational fluid dynamics. In order to verify the feasibility of the strategy, the fuel economy tests were carried out at 0 km/h, 90 km/h and 120 km/h, respectively. The results showed that the fuel consumption under the three working conditions was reduced by 0.01 L/100 km, 0.07 L/100 km and 0.13 L/100 km, respectively, indicating that the proposed strategy can significantly reduce fuel consumption.

主动式格栅百叶窗（AGS）作为一种新兴的提高油耗的技术，已应用于发动机冷却系统。由于格栅开度和冷却风扇的匹配方式不合理，发动机过冷问题普遍存在。AGS和冷却风扇作为调节冷却气流功能类似的部件，在参数匹配和运行上相互分离，降低了冷却效率和燃油经济性。为了实现精确冷却和提高燃油经济性，利用计算流体动力学提出了AGS和冷却风扇的联合控制策略。为了验证该策略的可行性，分别在0公里/小时、90公里/小时和120公里/小时进行了燃油经济性测试。结果表明，三种工况下的油耗均降低了0。