Seven-speed transmission

Details Seven-speed transmission Seven-speed transmission

2006-03-21

2006-03-21

Pang, Roger (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S288000

Reexamination Certificate

active

07014589

ABSTRACT:
A seven-speed transmission includes an input shaft, an output shaft, and a planetary gear arrangement having first, second, third and fourth planetary gear sets, each planetary gear set having first, second and third members. First and second interconnecting members continuously interconnect members of the planetary gear sets. Seven torque-transmitting mechanisms are engaged in combinations of three to establish seven forward speed ratios and a reverse speed ratio between the input shaft and the output shaft. The transmission is alternatively operable through two different sets of six speeds by engaging the sixth or seventh torque-transmitting mechanism before cycling the transmission through different speed ratios. In this manner, the transmission is operable as a dual six-speed transmission.

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