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Home Generators or Motors Electric-hybrid-transmission-with-a-torque-converter

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Details
Inventors: Sherman, James Francis;
Assignee: General Motors Corporation (Detroit, MI)
Primary Examiner: Stephan; Steven L.
Assistant Examiner: Ponomarenko; Nicholas
Attorney, Agent or Firm: Scherer; Donald F.

A torque converter disposed between a motor/generator and an internal combustion engine during the engine starting procedure and between the motor/generator and a multi-speed transmission as well as between the engine and a multi-speed transmission during vehicle travel. A pair of selectively engageable clutches and a one-way device are incorporated to accomplish the engine start power path, the normal torque converter power path and a converter bypass power path.

DETAILED DESCRIPTION A torque converter is positioned in the transmission and provided with selectively engageable clutches to establish a plurality of power paths.
A first power path is established between the electric motor generator and the internal combustion engine to enable starting of the engine.
A second power path bypasses the torque converter.
A third power path provides a continuous connection between the torque converter turbine and a multi-speed power transmission, and a fourth power path is established through a one-way device between the engine, motor/generator and torque converter impeller.
The first power path provides a torque multiplication between the motor/generator and the engine during engine startup without the need for an additional planetary gear set and also permits engine coast braking during normal vehicle operation.
The fourth power path enables the engine to supply power directly to the motor/generator and to the vehicle through the torque converter and the transmission.
Accordingly, it is an object of this invention to provide an improved electric hybrid transmission.



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