Control apparatus for a multi-speed transmission

Details Control apparatus for a multi-speed transmission Control apparatus for a multi-speed transmission

2005-09-27

2005-09-27

Wright, Dirk (Department: 3681)

Machine element or mechanism

Gearing

Interchangeably locked

C475S149000

Reexamination Certificate

active

06948396

ABSTRACT:
A power transmission employs a plurality of torque-to-thrust apparatus to control the engagement and disengagement of the transmission ratios. Each of the torque-to-thrust apparatus is operatively connectible with a pair of electric motors, which are individually operable to control the operation of the torque-to-thrust apparatus. During transmission operation, one of the electric motors is operable to disengage a friction device within the transmission while the other electric motor is operable to engage a different friction device within the transmission, thus permitting controlled ratio upshifts and downshifts.

REFERENCES:
patent: 5078249 (1992-01-01), Botterill

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