The engine cooling fan is an important part of the cooling system of an automobile engine, used to drive air and improve the efficiency of the cooling system for heat dissipation purposes. There are three main structural types of such fans: centrifugal fans, axial fans and turbo fans, which operate on the principle of centrifugal force driving the fan from the rotation of the impeller, with the blades intake air in a specific direction, while the turbine improves the efficiency of heat dissipation by increasing the flow of gas, respectively.

The installation location of the cooling fan often corresponds to the engine's radiator and water tank and other equipment, and its structure includes components such as fan blades, motors and brackets. In automotive engines, the speed of the cooling fan is usually controlled by a computer to ensure that the engine can effectively dissipate heat under different operating conditions.

The performance and efficiency of the cooling fan directly affects the cooling effect of the engine, therefore, factors such as air volume and speed should be considered when selecting a cooling fan. The fan fanning volume mainly depends on the fan speed and the shape, mounting angle and number of blades, while the speed control is usually achieved by resistance or PWM signal.

In practice, cooling fans are often used in conjunction with radiators, water tanks and other equipment to achieve the best cooling effect. For example, propeller-type axial fans are commonly used in automotive water-cooled engines, while electric fans are used in cars.