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:
Nov. 03, 2009
Filed:
May. 03, 2006
Hybrid powertrain with electrically variable transmission having parallel friction launch and method
Alan G. Holmes, Clarkston, MI (US);
Michael R. Schmidt, Carmel, IN (US);
Donald Klemen, Carmel, IN (US);
Larry T. Nitz, South Lyon, MI (US);
Grantland I. Kingman, Waterford, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
Gregory A. Hubbard, Brighton, MI (US);
Brendan M. Conlon, Rochester Hills, MI (US);
Alan G. Holmes, Clarkston, MI (US);
Michael R. Schmidt, Carmel, IN (US);
Donald Klemen, Carmel, IN (US);
Larry T. Nitz, South Lyon, MI (US);
Grantland I. Kingman, Waterford, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
Gregory A. Hubbard, Brighton, MI (US);
Brendan M. Conlon, Rochester Hills, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A hybrid powertrain includes a control unit that regulates electric power interchange an energy storage device and a motor/generator for causing selective torque generation by the motor/generator and for controlling engagement of torque-transmitting mechanisms. The control unit is configured to place the torque-transmitting mechanism in slipping engagement to launch the vehicle and thereby decouple a fixed relationship between engine torque and motor/generator torque or between engine torque and torque at the output member. A method of operating a hybrid vehicle powertrain is also provided.