Planetary gear transmission systems or components – Input from independent power sources – Including electric motor input
Reexamination Certificate
2007-03-20
2007-03-20
Le, David D. (Department: 3681)
Planetary gear transmission systems or components
Input from independent power sources
Including electric motor input
C180S065230, C180S065700
Reexamination Certificate
active
10997710
ABSTRACT:
The electrically variable transmission family of the present invention provides low-content, low-cost electrically variable transmission mechanisms including first and second differential gear sets, a battery, two electric machines serving interchangeably as motors or generators, and four or five selectable torque-transfer devices. The selectable torque transfer devices are engaged singly or in combinations of two to yield an EVT with a continuously variable range of speeds (including reverse) and four mechanically fixed forward speed ratios. 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.
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patent: 6478705 (2002-11-01), Holmes et al.
patent: 6527658 (2003-03-01), Holmes et al.
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Bucknor Norman K.
Hendrickson James D.
Holmes Alan G.
Raghavan Madhusudan
Usoro Patrick B.
General Motors Corporation
Le David D.
Marra Kathryn A.
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