A automobile's fan Testament coerce slower at sluggish engine rush.
This belt is rotated by the engine's crankshaft pulley, in turn driving the fan.
Speed
The crankshaft pulley's rotational speed is directly proportional to engine speed.Purpose
A liquid coolant reduces a vehivle's engine temperature and then passes finished the radiator. Ambient air passes terminated the radiator, illustration out the heat the coolant absorbed from the hot engine. At a stop or low vehicle speeds, the radiator fan engages to draw more ambient air through the radiator.
Design
The fan, once engaged by a fan clutch, operates via a belt and pulley system.An car's engine must be Enough cooled to indemnify the altitudinous operating temperatures it is subjected to. An chief Element of this operation is the radiator fan. One that is mechanically controlled Testament slow down as the engine slows.
When the engine is operating at a slow idle speed, the crankshaft pulley is also rotating slower, thus slowing the belt and the radiator fan.
