TRANSMISSION HAVING SELECTABLE POWER TRANSFER SHAFT

摘要

A front wheel drive transmission is adapted for all-wheel drive by the addition of a selectively engageable power take-off shaft. When a disconnect clutch is engaged, power may be transferred to rear wheels via a power take-off unit and a rear drive unit to improve vehicle mobility. When the disconnect clutch is disengaged, various components of the all-wheel drive system do not rotate, reducing parasitic losses and improving fuel economy. To provide packaging space for the disconnect clutch, the differential is moved to the left (driver side) of the driven transfer gear. A planetary differential, such as a double pinion planetary differential, is suitable for this location

主权项

1. A vehicle powertrain comprising:
an engine; a multiple ratio gearbox having an input shaft driven by the engine and an output gear supported for rotation about the input shaft; a transfer shaft having a driven transfer gear meshing with the output gear and a driving transfer gear meshing with a final drive gear; a differential axially adjacent to a first side of the driven transfer gear and configured to transfer power from the final drive gear to first and second axle shafts; and a disconnect clutch axially adjacent to a second side of the driven transfer gear and configured to selectively transfer power from the final drive gear to a power take-off shaft.