Power split transaxle for producing stepless reverse,...

Details Power split transaxle for producing stepless reverse,... Power split transaxle for producing stepless reverse,...

2006-05-23

2006-05-23

Lewis, Tisha (Department: 3681)

Planetary gear transmission systems or components

Nonplanetary variable speed or direction transmission...

Nonplanetary transmission is friction gearing

C475S211000, C475S218000

Reexamination Certificate

active

07048667

ABSTRACT:
The invention relates to a power split drive train that includes a variable speed ratio path and a fixed speed ratio path. An epicyclic gearset, driven at two inputs, one input continually connected to the variable path, combines the power from the fixed path and variable path. A coupler driveably connects one of the gearset inputs alternately to the fixed path and the variable path. With the coupler connecting the fixed path and the gearset input, the speed ratio of the variable speed ratio path varies over a range that produces a stepless range of reverse speed ratios, geared neutral and a stepless range of forward speed ratios. With the coupler connecting the variable path and a gearset input, the speed ratio of the variable speed ratio path varies over a range that produces higher speed ratios in forward drive.

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