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:
Jul. 17, 2012
Filed:
Nov. 07, 2007
Jy-jen F. Sah, West Bloomfield, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
Gregory A. Hubbard, Brighton, MI (US);
Jy-Jen F. Sah, West Bloomfield, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
Gregory A. Hubbard, Brighton, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method and apparatus to control an electro-mechanical transmission is provided, selectively operative in a plurality of fixed gear modes and continuously variable modes, and comprising first and second electrical machines and hydraulically-actuated clutches. Included is launching a vehicle so equipped, comprising operating the electro-mechanical transmission in a continuously variable mode to transmit motive torque from the first electrical machine to the driveline, and, selectively increasing an operating speed of the engine and selectively actuating a second clutch to transmit motive torque generated by the second electrical machine when an operator torque request exceeds a predetermined threshold.