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.

　　它的特征是可以根據發動機溫度調節的冷卻空氣量。 車輛冷時風扇不工作，溫度高時風扇速度最快。 電風扇安裝在散熱器內部。 當發動機溫度升至指定溫度時，電風扇運行以加快空氣流動，散發熱量并增強散熱器的散熱效果。

　　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.

　　汽車電風扇的檢查方法如下：

　　The inspection method of automobile electric fan is as follows:

　　1個檢查風扇電機

　　1 check fan motor

　　風扇電機燒壞的明顯特征是風扇不工作。 如果檢查風扇電路是否正常，則溫度控制開關工作正常，并且直接電源驅動風扇無法旋轉。 風扇電機已損壞，應更換。

　　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確定電風扇的啟動溫度

　　2. Determine the starting temperature of the electric fan

　　不同型號的風扇開始運行時的溫度不同，但差異不會太大。 表中列出了普通型號電風扇的高低速啟動溫度。

　　? 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電風扇失速溫度的測定

　　Measurement of stall temperature of ￣ 3 electric fan

　　當發動機負荷降低且冷卻液溫度下降時，電風扇將從高檔旋轉至低檔。 當發動機冷卻液溫度降至一定溫度時，低速風扇也將停止旋轉。 見表。

　　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.