A magnetorheological fluid brake utilizing a positive displacement fluid pump
adapted
to pump a magnetorheological fluid through a viscosity regulator. The viscosity
regulator is adapted to controllably vary the viscosity of the magnetorheological
fluid, altering the pumping restriction against the fluid pump, resulting in variable
resistance to pump shaft rotation relative to the pump housing. An electronic steering
system for a work vehicle utilizing the illustrated magnetorheological brake as
a resistance device to provide tactile feedback as a function of steering shaft
rotational position.
