Three mode, multi-speed transmission

Details Three mode, multi-speed transmission Three mode, multi-speed transmission

2007-11-20

2007-11-20

Pang, Roger (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

Reexamination Certificate

active

11260875

ABSTRACT:
An automatic transmission providing modal speed ratios, single transition gear shifting, low internal speeds, and an output lock feature is provided. First, second and third modal torque-transmitting mechanisms are selectively engagable along with first and second input torque-transmitting mechanisms to effect power flow to first and second planetary gear set to cause the speed of a member of one of the gear sets to increase in the first mode (when the first and second input torque-transmitting mechanisms are engaged in successive order while the first modal torque-transmitting mechanism is engaged), decrease in the second mode (when the first and second input torque-transmitting mechanisms are engaged in reverse order while the second modal torque-transmitting mechanism is engaged) and increase in the third mode (when the first and second input torque-transmitting mechanisms are engaged in successive order while the third modal torque-transmitting mechanism is engaged).

REFERENCES:
patent: 3118319 (1964-01-01), Straub
patent: 5620387 (1997-04-01), Janiszewski
patent: 6010422 (2000-01-01), Garnett et al.
patent: 2006/0063638 (2006-03-01), Sowul et al.

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