确定冷却风扇驱动系统功耗的测试方法

[中文适用范围]： 本 SAE 推荐实践中概述的技术是作为确定和评估重型卡车和公共汽车燃油消耗的总体计划的一部分而开发的，但它也适用于非公路车辆。建议根据实际安装数据仔细审查具体运行条件。冷却要求受到风扇驱动系统冷却的所有热交换器的影响。这些可能包括散热器、冷凝器、增压空气冷却器、油冷却器等。由于冷却风扇和风扇驱动系统的尺寸、形状、配置和安装方式各不相同，因此未包括特定的测试设备。使用给定风扇的已知功率/速度关系，此过程可用于计算使用下面列出的驱动器类型的冷却系统的风扇驱动系统的功耗。然后，该功耗可用于根据 SAE J1349 确定发动机净功率。 [外文原描述]： The techniques outlined in this SAE Recommended Practice were developed as part of an overall program for determining and evaluating fuel consumption of heavy-duty trucks and buses, but it is applicable to off highway vehicles as well.It is recommended that the specific operating conditions be carefully reviewed on the basis of actual installation data. Cooling requirements are affected by all heat exchangers that are cooled by the fan drive system. These may include radiators, condensers, charge air coolers, oil coolers, and others.Because of the variation in size, shape, configuration, and mountings available in cooling fans and fan drive systems, specific test devices have not been included.Using known power/speed relationships for a given fan, this procedure can be used to calculate the fan drive system’s power consumption for cooling systems using the types of drives listed below. This power consumption may then be used in determining engine net power per SAE J1349. For more fan power/speed relationships, refer to SAE J1339.Cross Reference: J1339_201504,J1349