Electrically variable transmission having six fixed speed...

Details Electrically variable transmission having six fixed speed... Electrically variable transmission having six fixed speed...

2007-05-08

2007-05-08

Pang, Roger (Department: 3681)

Planetary gear transmission systems or components

Input from independent power sources

Including electric motor input

C475S277000, C475S282000

Reexamination Certificate

active

11032791

ABSTRACT:
A two-mode, compound-split, electro-mechanical transmission utilizes an input member for receiving power from an engine, and an output member for delivering power from the transmission. First and second motor/generators are operatively connected to an energy storage device through a control for interchanging electrical power among the storage device. The transmission employs three planetary gear sets that cooperate with a plurality of torque transmitting devices to provide two distinct gear trains or power paths corresponding to two modes of electrically variable operation in which the speed ratio between the input member and the output member varies with the speed of at least one of the motor/generators. The torque transmitting devices are selectively engageable to provide six discrete, fixed speed ratios.

REFERENCES:
patent: 5558588 (1996-09-01), Schmidt
patent: 5931757 (1999-08-01), Schmidt
patent: 6010422 (2000-01-01), Garnett et al.
patent: 6976931 (2005-12-01), Raghavan et al.
patent: 2005/0261097 (2005-11-01), Klemen et al.
patent: 2006/0063628 (2006-03-01), Sowul et al.

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