Dual path electrically-variable transmission

Details Dual path electrically-variable transmission Dual path electrically-variable transmission

2006-10-31

2006-10-31

Estremsky, Sherry (Department: 3681)

Planetary gear transmission systems or components

Input from independent power sources

Including electric motor input

Reexamination Certificate

active

07128675

ABSTRACT:
An electrically-variable transmission includes an input shaft, an output shaft, two electric motor/generators, and four nodes between which three parallel power paths are defined. Two of the power paths are mechanical and one of the power paths is electrical. The electric motor generators provide continuously variable speed ratios; manipulation of the power paths at the nodes provides a plurality of continuously variable operating modes for increased efficiency and smaller motor size. The transmission also provides an equal forward/reverse system with an input split.

REFERENCES:
patent: 5558173 (1996-09-01), Sherman
patent: 5558175 (1996-09-01), Sherman
patent: 5558589 (1996-09-01), Schmidt
patent: 5558595 (1996-09-01), Schmidt et al.
patent: 5571058 (1996-11-01), Schmidt
patent: 5577973 (1996-11-01), Schmidt
patent: 5931757 (1999-08-01), Schmidt
patent: 6090005 (2000-07-01), Schmidt et al.
patent: 6371882 (2002-04-01), Casey et al.
patent: 6478705 (2002-11-01), Holmes et al.
patent: 6551208 (2003-04-01), Holmes et al.

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