8-speed hybrid transmission

Details 8-speed hybrid transmission 8-speed hybrid transmission

2009-03-27

2011-12-27

Le, David D (Department: 3655)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural drive ratios other than unity

C475S311000

Reexamination Certificate

active

08083633

ABSTRACT:
The hybrid transmission has a plurality of members that can be utilized in powertrains to provide eight forward speed ratios and one reverse speed ratio. The hybrid transmission includes a motor/generator, three planetary gear sets, five torque-transmitting devices, one fixed interconnection, three external gear sets and a final drive gear set. The powertrain includes an engine and torque converter that is continuously connected to one of the planetary gear members and an output member that is continuously connected with one of the external gear sets. The five torque-transmitting devices provide interconnections between various planetary and external gear members, the input shaft, and the transmission housing, and are operated in combinations of three to establish eight forward speed ratios and one reverse speed ratio.

REFERENCES:
patent: 5558595 (1996-09-01), Schmidt et al.
patent: 5931757 (1999-08-01), Schmidt
patent: 6478705 (2002-11-01), Holmes et al.
patent: 6527658 (2003-03-01), Holmes et al.
patent: 6962545 (2005-11-01), Larkin
patent: 2006/0142111 (2006-06-01), Park
patent: 2010/0248883 (2010-09-01), Wittkopp et al.
patent: 202008004052 (2008-05-01), None

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