ON-DEMAND POWER TAKE-OFF UNIT FOR FOUR-WHEEL DRIVE VEHICLE

摘要

An on-demand power take-off unit is equipped with a dual-mode bi-directional overrunning clutch and a shift mechanism to establish on-demand and part-time four-wheel drive modes. Further, the power take-off unit includes a disconnect clutch that is controlled by the mode shift mechanism to establish a two-wheel drive mode in addition to the four-wheel drive modes.