Automatic transmission having auxiliary drive
AssigneeFord Motor Company
InventorsEdward J. Debler, Kenneth C. Young, Richard A. Snyder
Life of this patent
Estimating the term…
Abstract
A transaxle assembly for use in the driveline of a motor vehicle includes an hydrokinetic torque converter located on an engine axis, a planetary transfer drive gear unit coaxial with the torque converter and engine, a chain drive mechanism for transmitting torque from the engine axis to the axis of a multiple speed automatic transmission, first and second planetary gear units for producing multiple speed ratios, hydraulically actuated friction brakes and clutches for controlling engagement and release of the elements of the planetary gear units, a final drive planetary gearset, an axle differential, and axle shaft drivably connected to the differential side gears.
Claims7
An automatic transmission for motor vehicles, comprising:
- torque converter means mounted on a first axis, having an impeller drivably connectable to a power source and a turbine, connectable to the impeller, for producing a hydrokinetic drive connection between the turbine and impeller;
- planetary gearing means mounted on a second axis substantially parallel to the first axis, having an input shaft and output shaft, for producing multiple overdrive and underdrive ratios of the speed of the output shaft to the speed of the input shaft;
- a transfer drive means mounted on the first axis, drivably connected to the turbine and input shaft, for driving the input shaft at the speed of the turbine and for overdriving the input shaft with respect to the speed of the turbine but lacking capacity to underdrive the input shaft with respect to the speed of the turbine.
An automatic transmission for motor vehicles, comprising:
- torque converter means mounted on a first axis, having an impeller drivably connectable to a power source and a turbine, connectable to the impeller, for producing a hydrokinetic drive connection between the turbine and impeller;
- planetary gearing means mounted on a second axis substantially parallel to the first axis, having an input shaft and output shaft, for producing multiple overdrive and underdrive ratios of the speed of the output shaft to the speed of the input shaft the planetary gearing means further comprising first and second planetary gear units, each gear unit having a sun gear, ring gear, carrier, and planet pinions rotatably supported on the carrier in continuous meshing engagement with the ring gear and sun gear, the sun gear of the first gear unit drivably connected to the input shaft, the carrier of the first gear unit drivably connected to the ring gear of the second gear unit, the ring gear of the first gear unit drivably connected to the carrier of the second gear unit and output shaft;
- first means for producing a one-way drive connection between the input shaft and sun gear of the first gear unit;
- second means for producing a one-way drive connection between the input shaft and sun gear of the first gear unit;
- first clutch means for releasably connecting the input shaft and carrier of the first gear unit;
- first brake means for releasably holding against rotation and releasing the carrier of the first gear unit and ring gear of the second gear unit;
- and second brake means for releasably holding against rotation and releasing the sun gear of the second gear unit;
- a transfer drive means mounted on the first axis, drivably connected to the turbine and input shaft, for driving the input shaft at the speed of the turbine and for overdriving the input shaft with respect to the speed of the turbine but lacking capacity to underdrive the input shaft with respect to the speed of the turbine, the transfer drive means comprising a planetary gear set having a sun gear, ring gear, carrier, and planet pinions, each planet pinion rotatably supported on the carrier in continuous meshing engagement with the ring gear and sun gear, overrunning coupling means for producing a one-way drive connection between said ring gear and sun gear, transfer clutch means for releasably holding against rotation said ring gear, and means for drivably connecting said carrier and input shaft;
- and
- coast clutch means for releasably connecting said sun gear and ring gear.
Dependencies are inferred from the claim text.