High Efficiency Fan Drive (HEFD)

The paper describes a solution of a High Efficiency Fan Drive with minimum power loss which meets both the cooling requirements of a heavy duty truck engine as well as the increasing demand for low fuel consumption. The proposed solution combines a switchable belt speed increaser drive and a 3-speed electromagnetic clutch. This combination of both proven technologies offers a major fuel saving compared to existing variable speed solutions and meets perfectly the cooling requirements of the engine.

The authors present theoretical calculations, design proposals and first prototype applications of the High Efficiency Fan Drive.