Adaptive pressure control method for achieving synchronous...

Details Adaptive pressure control method for achieving synchronous... Adaptive pressure control method for achieving synchronous...

2006-02-07

2006-02-07

Estremsky, Sherry (Department: 3681)

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid controlled mechanical clutch or brake

C475S127000

Reexamination Certificate

active

06994647

ABSTRACT:
An adaptive shift control method for a geared multiple ratio transmission having friction elements for clutches and brakes to establish and disestablish gear ratio changes wherein at least one ratio change involves engagement of one friction element in synchronism with disengagement of another friction element. Operating parameters are adapted throughout the life of the transmission to reduce synchronous errors by developing and learning pressure and time adjustments for the friction elements.

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