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. 09, 2007
Filed:
Dec. 13, 2004
Anthony P. Tata, Fenton, MI (US);
Kyle K. Kinsey, Fenton, MI (US);
Robert D. Burns, Lake Orion, MI (US);
Brendan M. Conlon, Rochester Hills, MI (US);
Donald P. Pfaff, Washington, MI (US);
Mark A. Theobald, Bloomfield Hills, MI (US);
Mark A. Damico, Clarkston, MI (US);
Anthony P. Tata, Fenton, MI (US);
Kyle K. Kinsey, Fenton, MI (US);
Robert D. Burns, Lake Orion, MI (US);
Brendan M. Conlon, Rochester Hills, MI (US);
Donald P. Pfaff, Washington, MI (US);
Mark A. Theobald, Bloomfield Hills, MI (US);
Mark A. Damico, Clarkston, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A powertrain includes an engine with an engine output member and a transmission with two motor/generators and a transmission input member operatively connected to the engine output member. A control unit is configured to selectively cause a device to resist or prevent rotation of the input member in response to the existence of certain conditions, such as the engine not supplying torque to the transmission and the transmission being in reverse operating mode. Resisting or preventing rotation of the input member improves transmission performance when only the motor/generators are supplying torque to propel the vehicle. A corresponding method is also provided.