Multi-speed transmission

Details Multi-speed transmission Multi-speed transmission

2007-10-30

2008-08-26

Ho, Ha D. (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

Reexamination Certificate

active

07416509

ABSTRACT:
A multi-speed transmission has four planetary gear sets and five torque-transmitting mechanisms packaged in at least one of six possible zones within the transmission casing. The torque-transmitting mechanisms are selectively engagable in different combinations to achieve eight forward speed ratios and a reverse speed ratio between the input member and the output member.

REFERENCES:
patent: 4683776 (1987-08-01), Klemen
patent: 7226381 (2007-06-01), Klemen
patent: 7341537 (2008-03-01), Klemen
patent: 2008/0064556 (2008-03-01), Kamm et al.

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