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:
Oct. 30, 2018
Filed:
Dec. 04, 2015
GM Global Technology Operations Llc, Detroit, MI (US);
Scott A. Kline, Richmond, MI (US);
Patrick M. Gibson, Ypsilanti, MI (US);
Raj Kommareddy, South Lyon, MI (US);
Roberto Diaz, Novi, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A transmission includes a stationary member, an input member, and gear sets each having a plurality of nodes. The transmission includes a first clutch that connects a node of one gear set to the stationary member to establish an Lmode, and a second clutch that connects a node of another gear set to the stationary member to establish aL mode. A SOWC is connected between nodes of two gear sets, and a controller, in response to a requested shift L-Lshift while engine braking, executes a method to release the first clutch and thereby enters a neutral mode. The SOWC is released when slip across the first clutch exceeds a first threshold, then the first clutch reapplied when a SOWC slip level exceeds another threshold to thereby enter a 1gear freewheeling mode. The second clutch is reapplied to enter the Lmode and resume engine braking.