The eVisco is a cooling fan whereby the rotation speed is electronically controlled by a dedicated control unit. The main difference between the traditional viscostatic fan is that with an eVisco fan, it is possible to reach any possible fan speed (between low idle and maximum fan speed), while the traditional one has only a few steps of fan speed that are mechanically calibrated. The rotation speed of the eVisco fan is calculated in relation to multiple parameters recorded by the ECU, resulting in improved fuel efficiency and better horsepower output.
