Dual mode continuously variable transmission having multiple tor

Planetary gear transmission systems or components – Nonplanetary variable speed or direction transmission... – Nonplanetary transmission is belt or chain gearing

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Details

475207, 475218, 475219, F16H 3702

Patent

active

059614145

ABSTRACT:
An automatic transmission for an automotive vehicle includes a continually variable drive mechanism having one sheave assembly fixed to an input shaft and the output sheave assembly supported on an intermediate shaft, a first gearset for producing forward drive low gear and a range of continuously variable gear ratios, a second gearset for producing reverse drive, a first fixed ratio drive mechanism in the form of a chain drive providing a torque delivery path between the intermediate shaft and a ring gear of the first gearset, a second fixed drive mechanism in the form of a chain drive located in a torque delivery path between the output shaft and a front drive shaft, a transfer clutch for connecting and releasing the output sheave of the variable drive mechanism and sprocket wheel fixed to that shaft, a coast brake and forward brake for holding alternately the ring gear of the first gearset, and a reverse brake for holding the carrier of the second gearset.

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The Ford Research Dual Mode Continuously Variable Transmission, T.R. Stockton, International Conference on Fuel Efficient Power Trains and Vehicles, London, England, Oct. 1984 (841305).

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