Multi-speed planetary power transmission

Details Multi-speed planetary power transmission Multi-speed planetary power transmission

2007-07-24

2007-07-24

Estremsky, Sherry (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

Reexamination Certificate

active

11172506

ABSTRACT:
A power transmission for use in a powertrain has an input shaft, an output shaft, an input planetary gearset, and an output planetary gearset. The planetary gearsets are controlled through the selective engagement of seven torque-transmitting mechanisms, three of which are rotating-type torque-transmitting mechanisms and four of which are stationary-type torque-transmitting mechanisms. By selective engagement of the torque-transmitting mechanisms in combinations of three, the input planetary gearset and the output planetary gearset are combined to establish eight forward speed ratios between the input shaft and the output shaft.

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