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:
Nov. 18, 2014
Filed:
Nov. 16, 2012
GM Global Technology Operations Llc, Detroit, MI (US);
Syed Naqi, Dearborn, MI (US);
Lawrence A. Kaminsky, White Lake, MI (US);
Jy-Jen F. Sah, West Bloomfield, MI (US);
Shaun C. Bowman, Ann Arbor, MI (US);
Christopher A. Laurent, Lake Orion, MI (US);
George Robison, Bloomfield Hills, MI (US);
Silva Hiti, Redondo Beach, CA (US);
Jonathan M. Bolenbaugh, Ann Arbor, MI (US);
Ali K. Naqvi, White Lake, MI (US);
Sasa Lucic, Wixom, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A powertrain system includes an internal combustion engine, a first electric machine and an electro-mechanical transmission operative to transmit torque to a driveline. A method for controlling the powertrain system in the presence of a controlled neutral operation of the electro-mechanical transmission being selected includes monitoring vehicle speed, and only when the monitored vehicle speed is indicative of a low-speed zone restricting a transition from a current engine operating state.