The electronic fan is the main component of the cooling system. At this stage, some cars have eliminated fixed fans and replaced them with electric fans.

　　它的特征是可以根据发动机温度调节的冷却空气量。 车辆冷时风扇不工作，温度高时风扇速度快。 电风扇安装在散热器内部。 当发动机温度升指定温度时，电风扇运行以加快空气流动，散发热量并增强散热器的散热效果。

　　It is characterized by the amount of cooling air that can be adjusted according to the engine temperature. When the vehicle is cold, the fan does not work. When the temperature is high, the fan speed is the fastest. The electric fan is installed inside the radiator. When the engine temperature rises to the specified temperature, the electric fan operates to speed up the air flow, dissipate heat and enhance the heat dissipation effect of the radiator.

　　汽车电风扇的检查方法如下：

　　The inspection method of automobile electric fan is as follows:

　　1个检查风扇电机

　　1 check fan motor

　　风扇电机烧坏的明显特征是风扇不工作。 如果检查风扇电路是否正常，则温度控制开关工作正常，并且直接电源驱动风扇无法旋转。 风扇电机已损坏，应更换。

　　The obvious feature of fan motor burnout is that the fan does not work. If you check whether the fan circuit is normal, the temperature control switch works normally, and the direct power drive fan cannot rotate. The fan motor is damaged and should be replaced.

　　2确定电风扇的启动温度

　　2. Determine the starting temperature of the electric fan

　　不同型号的风扇开始运行时的温度不同，但差异不会太大。 表中列出了普通型号电风扇的高低速启动温度。

　　? different models of fans start at different temperatures, but the difference will not be too large. The high and low speed starting temperature of common electric fans are listed in the table.

　　3电风扇失速温度的测定

　　Measurement of stall temperature of ￣ 3 electric fan

　　当发动机负荷降低且冷却液温度下降时，电风扇将从高档旋转低档。 当发动机冷却液温度降一定温度时，低速风扇也将停止旋转。 见表。

　　When the engine load decreases and the coolant temperature decreases, the electric fan will rotate from high gear to low gear. When the engine coolant temperature drops to a certain temperature, the low speed fan will also stop rotating. See table.