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:
Jan. 27, 2015
Filed:
Aug. 22, 2013
GM Global Technology Operations Llc, Detroit, MI (US);
Brian L. Spohn, Holly, MI (US);
Michael William Roblin, North Royalton, OH (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A powertrain system includes an internal combustion engine rotatably coupled via an input member to a transmission. The transmission has a hydraulic circuit including a hydraulic fluid pump directly mechanically coupled to the input member. A computer-implemented method for operating the powertrain system includes, in response to a command to execute an engine autostop maneuver, determining an engine speed ramping profile to achieve a desired stopped engine position. Hydraulic pressure in the hydraulic circuit is controlled in response to the engine speed ramping profile and engine speed during said engine autostop maneuver.