Abstract
In the past the engine driven fan was a major component of the automotive cooling system. Most of today's cooling systems use electric radiator fans which are not governed by engine speed but by engine temperature. The advantages have been better engine temperature control, an increase in p014/er to the drive wheels and better fuel efficiency. Currently, car engines are manufactured with a belt driven coolant pump governed by engine speed. The authors have developed a patented electric coolant pump which, when combined with a patented electronic thermal controller, have produced similar benefits to those gained from the change from belt driven fans to electric fans. Additional benefits are the removal of the engine thermostat and the ability to cool the engine after a hot engine shut down, to eliminate heat soak.