| The Engine cooling fans are mechanical devices | | | | point. They turn back off when the temperature |
| that move the hot air and other gases, which can | | | | drops below that point. However, these types of |
| be harmful with regards to the safety of the | | | | automatic engine cooling fans are used in vehicles |
| engine unit of a vehicle. These gases and hot air | | | | that are more sophisticated. |
| can be discomforting for the people sitting inside | | | | Cars that are rear wheel driven have engines that |
| the vehicle. Since this articles needs to discuss the | | | | are usually longitudinally placed and have these |
| Engine cooling fans, these fans can be categorized | | | | engine-driven cooling fans. These fans have a |
| in three ways. Fans deliver large amounts of air or | | | | switch that is controlled with the surrounding |
| gas at low pressure, blowers have high rates of | | | | temperature and is called as a thermostatically |
| delivery at medium pressure, and compressors | | | | controlled viscous clutch. This clutch is positioned |
| deliver at high pressure. These Electric cooling fans | | | | at the hub of the fan, in the airflow coming |
| have an attached motor that moves blades of | | | | through the radiator. This special viscous clutch is |
| the fans which drives away the hot air around the | | | | much like the viscous coupling sometimes found in |
| radiator. Like the thermostat, the cooling fan has | | | | all-wheel drive cars. These types of latest engine |
| to be controlled so that it allows the engine to | | | | cooling fans can be retrieved by placing special |
| maintain a constant temperature. | | | | orders. |
| Almost all the front-wheel driven cars and vehicles | | | | In some perfectly designed engine cooling fans, |
| have the electric cooling fans installed in them as | | | | the designers have applied a semi-analytic and |
| their engine is usually mounted transversely, | | | | semi empirical formula which is specifically |
| meaning the output of the engine points toward | | | | developed for predicting noise radiation from |
| the side of the car. The fans are controlled either | | | | engine cooling fan assemblies. These engine cooling |
| with a thermostatic switch or by the engine | | | | fans significantly reduce the noise that is caused |
| computer, and they turn on when the | | | | by the engine. |
| temperature of the coolant goes above a set | | | | |