The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 2009
Filed:
Nov. 28, 2006
Brendan M. Conlon, Rochester Hills, MI (US);
Alan G. Holmes, Clarkston, MI (US);
Michael R. Schmidt, Carmel, IN (US);
Joel M. Maguire, Northville, MI (US);
Brendan M. Conlon, Rochester Hills, MI (US);
Alan G. Holmes, Clarkston, MI (US);
Michael R. Schmidt, Carmel, IN (US);
Joel M. Maguire, Northville, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A vehicle powertrain for a hybrid vehicle includes an electronically variable transmission (EVT) with an input member to receive mechanical rotary power from the engine, an output member to provide mechanical rotary power to a vehicle powertrain to propel the vehicle, and an EVT gear train configured to selectively and operatively couple the input member to the output member. The EVT further includes first and second motor/generators driveably coupled to the gear train. A selectively engageable input brake mechanism is provided to create a reaction torque for the motor/generators thereby enabling the motor/generators to be used with additive power for electric propulsion or regenerative braking. The input brake improves electrical power to mechanical power conversion efficiency by reducing power circulation when the EVT is operated in electric drive, engine off mode.