Abstract: A control system including MR or ER fluid is used to control actuation. The control system is configured to engage or disengage operably coupled elements. A joystick control system for a vehicle includes a controller configured to control engagement of operably coupled elements.

Abstract: A control system including MR or ER fluid is used to control actuation. The control system is configured to engage or disengage operably coupled elements. A joystick control system for a vehicle includes a controller configured to control engagement of operably coupled elements.

Abstract: Three independent functions are controlled from a single control lever. The lever is mounted on a universal joint having a slip yoke, a flanged yoke and a cross member extending between the two yokes and defining a first transverse pivot axis and a second transverse pivot axis. The slip yoke is provided with first and second ball joints located in the same plane as the cross member. The first function is controlled by the fore-and-aft movement of the control lever pivoting the slip yoke about the first transverse pivot axis moving the first ball joint up and down. The first ball joint is coupled to a first link that moves the first hydraulic control valve. The second function is controlled by the side-to-side movement of the control lever. Such a side-to-side movement pivots the slip yoke about the second transverse pivot axis moving the second ball joint and second link positioning the second hydraulic control valve. The third function is controlled by the twisting movement of the control lever.