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:
Sep. 09, 2014
Filed:
Aug. 31, 2011
Ali K. Naqvi, White Lake, 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);
Besim Demirovic, Troy, MI (US);
Pinaki Gupta, Wixom, MI (US);
Lawrence A. Kaminsky, White Lake, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A vehicle includes a powertrain with an engine, first and second torque machines, and a hybrid transmission. A method for operating the vehicle includes operating the engine in an unfueled state, releasing an off-going clutch which when engaged effects operation of the hybrid transmission in a first continuously variable mode, and applying a friction braking torque to a wheel of the vehicle to compensate for an increase in an output torque of the hybrid transmission resulting from releasing the off-going clutch. Subsequent to releasing the off-going clutch, an oncoming clutch which when engaged effects operation of the hybrid transmission in a second continuously variable mode is synchronized. Subsequent to synchronization of the oncoming clutch, the oncoming clutch is engaged.