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:
Dec. 17, 2013
Filed:
Jul. 23, 2012
Vijay A. Neelakantan, Rochester Hills, MI (US);
Andrew W. Phillips, Rochester, MI (US);
Zhe Xie, Rochester, MI (US);
Vijay A. Neelakantan, Rochester Hills, MI (US);
Andrew W. Phillips, Rochester, MI (US);
Zhe Xie, Rochester, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
In a multiple mode continuously variable transmission having a variator, a planetary gear assembly, a low mode brake that grounds a first component of the planetary gear assembly to provide lower operating speeds and a high mode brake that grounds a second component of the planetary gear assembly to provide higher operating speeds, the method of providing a mode upshift comprising the steps of adjusting the ratio of the variator from a low ratio to a high ratio, releasing the low mode brake while simultaneously engaging the high mode brake during a torque phase of the shift and reducing the variator ratio from a high ratio to a low ratio during the inertia phase of the shift, thereby eliminating torque interruption and providing a constant torque output.