Hydraulic system for an electro-mechanical transmission and...

Details Hydraulic system for an electro-mechanical transmission and... Hydraulic system for an electro-mechanical transmission and...

2006-07-21

2009-06-09

Bonck, Rodney H (Department: 3655)

192 clutches and power-stop control

Transmission and brake

Motor vehicle

C180S009100, C417S426000

Reexamination Certificate

active

07543695

ABSTRACT:
A hydraulic system for an electro-mechanical transmission includes an electrically-powered main pump, a battery powered auxiliary pump and an output pump. The main pump provides fluid to transmission components such as a torque-transmitting mechanism. The auxiliary pump provides fluid pressure to engage the torque-transmitting mechanism when electric power to the main pump is unavailable or the main pump is otherwise inoperable. The engaged torque-transmitting mechanism enables rotation of an output member which mechanically powers the output pump so that it may provide fluid to the transmission components in lieu of the main pump. A method of providing fluid to transmission components is also provided.

REFERENCES:
patent: 6390947 (2002-05-01), Aoki et al.
patent: 6447262 (2002-09-01), Clements
patent: 6647326 (2003-11-01), Nakamori et al.
patent: 6709362 (2004-03-01), Tomohiro et al.
patent: 6913558 (2005-07-01), Mori et al.
patent: 7163481 (2007-01-01), Takagi et al.

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