HAND IN GLOVE WITH THE RADIATOR

The fan clutch is the hub of the radiator fan. It not only accommodates the fan, it also transmits drive force from the engine to the fan as required. If the engine is cold, less drive force is transmitted to the fan. If the engine is hot, air is sucked through the radiator at full power.

In older vehicles, there are still fan clutches that are not controlled electronically. Their internal mechanism consists of two discs separated by a liquid (silicone oil). One disc is driven by the engine, the other is connected to the fan blade. If cooling is required, a bimetal spring ensures that the liquid between the discs transmits the rotational force from one disc to the other by means of adhesion.

The more modern version is an electronically controlled fan coupling, which is as much a part of a modern thermal management system as the switched water pump. In terms of design, it operates similarly, although the roughly regulated bimetal spring is replaced by the fine control of the engine control unit. This precise, requirement-oriented regulation saves fuel and reduces the environmental impact.

Cool Facts

• Distribution partner for Borg Warner

• Fan blades balanced for vibration-free running

• Special material ensures reliable operation at extremly high and low temperatures

• For quick and efficient repairs, febi also supplies the fan coupling and fan blades individually