Introduction

The Viscous Coupling or fan clutch is a thermostatic device that exists as an integral component of the cooling system. When the engine is cool or at normal operating temperature the fan clutch partially disengages the engine's, mechanically-driven radiator cooling fan. This saves power, since the engine does not have to fully drive the fan. However, if the engine temperature rises above the clutch's engagement temperature setting, the fan becomes fully engaged, thus drawing a higher volume of ambient air through the vehicle's radiator, which in turn serves to maintain or lower the engine coolant temperature to an acceptable level.

Advantages

Offering the latest innovative engineering, including fully modulating, cost-effective fan drives that control fan speed in direct proportion to engine cooling requirements.

With the fan only operating when required and at the appropriate speed the noise is minimized. Moreover, the power consumption and hence the fuel consumption are reduced. Nordic's Viscous Couplings can present possible fuel and horsepower savings of up to 10%.