Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Impeller-turbine type fluid circuit in series with planetary...
Patent
1989-09-25
1990-12-18
Wright, Dirk
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Impeller-turbine type fluid circuit in series with planetary...
475 71, 475205, F16H 3708
Patent
active
049783289
ABSTRACT:
A transaxle assembly for use in a vehicle driveline comprising a hydrokinetic torque converter (12, 14, 16) located on an engine axis, planetary gearing (178, 180) located on a space parallel axis including means (242, 248, 250) for transferring the output torque of the planetary gearing to each of two axle shafts situated on an axis common to the axis of the planetary gearing and a multiple ratio torque transfer drive (52, 80, 90, 112, 114) between the turbine of the hydrokinetic torque converter and the torque input element of the planetary gearing, the transfer drive comprising a pair of differential diameter external tooth gears that are independently rotated and clutch means (96, 98) for selectively activating and deactivating each of two torque flow paths between the differential diameter gears whereby the speed-torque characteristics of the engine can be precisely matched with the ratio range available for the planetary gearing and the hydrokinetic torque converter to effect optimum powertrain performance, fuel economy and gradeability.
REFERENCES:
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patent: 4509389 (1985-04-01), Vahratian et al.
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patent: 4719985 (1988-01-01), Zaiser
patent: 4836049 (1989-06-01), Moan
Ward's Engine Update, Jul. 15, 1989, p. 6.
Ford Motor Company
Harrington Donald J.
McKenzie Frank G.
Wright Dirk
Zerschling Keith L.
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