The engine is the most important part of our vehicle by including a large number of processes necessary to keep it moving and be able to move easily. However, due to its important function, the motor overheats in need of some kind of ventilation to keep it running. For that, we have a fan of the radiator because it dissipates all the heat when directing the air on the surface of the engine.
This component points directly to the center of the radiator and must cool the antifreeze that circulates through the block and thus reduce the temperature of the engine.
There are different kinds of fans depending on the engine conditions:
Manual fixed fan: This fan gets its power to operate from a pulley, which works with a belt from the crankshaft, and never stops. It sucks the air from the radiator to the outside regardless of the speed of the vehicle. It has no enlarges to disengage it or with degrees of inclination on the blades.
Thermal Clutch fan: Consists of a disc-shaped structure, located in front of the water pump and also driven by a pulley. The inside of the clutch has the fluid that produces the internal friction that is hooked with a bi-metallic sensor. When the engine RPM decreases sufficiently, the sensor captures the signal and engages the clutch, which is locked with the fan. The fan will increase its speed when the vehicle’s revolutions are low. When the auto reaches higher speeds and the air hits the radiator, the fan will turn off because it does not have to be used.
Electric fans: These fans are small and powerful. They can be mounted in front of the grill to push the air or behind the radiator to suck it out. Most of these are equipped with withthermal sensors that activate them when high temperatures are reached. Sometimes they are activated after the engine has turned off to bring the temperature back to normal specifications.
Flex fans: They feature a lightweight construction that supports riveted aluminum alloy blades. These have an acritical step between them and, as the number of revolutions increases, the leaves begin to flatten, which produces less resistance when throwing or sucking air operating in better shape and with less noise than the typical blades. This type of fans is used in high-performance cars.
Centrifugal clutch fan: This fan depends on the speed of the motor to engage or disengage from the engine. As the engine accelerates, the clutch allows the fan to partially enter, returning to the engine the energy that would have been used if it had been permanently connected. When the speed decreases, the clutch snaps into position and engages the fan.
