A controllable, multi-mode, bi-directional overrunning clutch assembly and
a shift system adapted for use in a transfer case for transferring drive
torque from a primary output shaft to a secondary output shaft so as to
establish a four-wheel drive mode. The clutch assembly includes a first
ring journalled on a first rotary member, a second ring fixed to a second
rotary member, and a plurality of rollers disposed in opposed cam tracks
formed between the first and second rings. The first ring is split to
define an actuation channel between its end segments. A cam rod is
moveable between positions engaged with and released from one or both end
segments of the split first ring. The shift system includes a mode fork
which controls movement of the cam rod for establishing four distinct
operational modes.
