Electrically variable transmissions with three...

Details Electrically variable transmissions with three... Electrically variable transmissions with three...

2008-07-01

2008-07-01

Ho, Ha D. (Department: 3681)

Planetary gear transmission systems or components

Input from independent power sources

Including electric motor input

Reexamination Certificate

active

07393297

ABSTRACT:
An electrically variable transmission family with low-content, low-cost electrically variable transmission mechanisms including first, second and third differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, and two or more selectable torque-transfer devices. The selectable torque transfer devices are engaged to provide an EVT with a continuously variable range of speeds (including reverse). The torque transfer devices and the first and second motor/generators are operable to provide five operating modes in the electrically variable transmission, including battery reverse mode, EVT reverse mode, reverse and forward launch modes, continuously variable transmission range mode, and fixed ratio mode in some embodiments.

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: 6953409 (2005-10-01), Schmidt et al.
patent: 7101298 (2006-09-01), Sowul et al.
patent: 7179186 (2007-02-01), Bucknor
patent: 7217211 (2007-05-01), Klemen et al.
patent: 2005/0245350 (2005-11-01), Tabata et al.

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