Borgwarner Inc.

Ulrich Niedermeier

Thomas Buchholz

Christian M Tilly

A fluid friction clutch, in particular for the fan of the radiator of an internal combustion engine, is described. A valve element ( ) controlling the clutch is operated via a solenoid control by means of a piston rod ( ) which is guided coaxially in the drive shaft ( ) of the clutch. The piston rod ( ) includes an anchor ( ), which is guided in the drive shaft ( ). An actuator coil ( ) is received in the magnet body ( ), which is seated rotatably upon the drive shaft ( ). The drive shaft ( ) guiding the anchor ( ) is provided with a non-magnetic separation gap ( ).

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Daisendorf, Germany

Ulrich Niedermeier