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:
Feb. 24, 2015
Filed:
Jul. 21, 2011
James M. Hart, Belleville, MI (US);
Bret M. Olson, Whitelake, MI (US);
Scott H. Wittkopp, Ypsilanti, MI (US);
James M. Hart, Belleville, MI (US);
Bret M. Olson, Whitelake, MI (US);
Scott H. Wittkopp, Ypsilanti, MI (US);
GM Global Technology Operations, LLC, Detroit, MI (US);
Abstract
A transmission of the present invention has an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes. A method for controlling the transmission selectively engages the torque transmitting devices in combinations of at least two to establish at least nine forward speed ratios and at least one reverse speed ratio.