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:
Aug. 12, 2014
Filed:
Feb. 17, 2012
Besim Demirovic, Troy, MI (US);
Pinaki Gupta, Wixom, MI (US);
Lawrence A. Kaminsky, White Lake, MI (US);
Ali K. Naqvi, White Lake, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
Jy-jen F. Sah, West Bloomfield, MI (US);
Besim Demirovic, Troy, MI (US);
Pinaki Gupta, Wixom, MI (US);
Lawrence A. Kaminsky, White Lake, MI (US);
Ali K. Naqvi, White Lake, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
Jy-Jen F. Sah, West Bloomfield, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A hybrid transmission includes first and second electric machines. A method for operating the hybrid transmission in response to a command to execute a shift from an initial continuously variable mode to a target continuously variable mode includes increasing torque of an oncoming clutch associated with operating in the target continuously variable mode and correspondingly decreasing a torque of an off-going clutch associated with operating in the initial continuously variable mode. Upon deactivation of the off-going clutch, torque outputs of the first and second electric machines and the torque of the oncoming clutch are controlled to synchronize the oncoming clutch. Upon synchronization of the oncoming clutch, the torque for the oncoming clutch is increased and the transmission is operated in the target continuously variable mode.