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:
Jun. 04, 2013
Filed:
Jun. 02, 2011
Michael D Haggerty, Sterling Heights, MI (US);
Sean W Mcgrogan, Ann Arbor, MI (US);
Adam J Heisel, Garden City, MI (US);
Michael D Haggerty, Sterling Heights, MI (US);
Sean W McGrogan, Ann Arbor, MI (US);
Adam J Heisel, Garden City, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A powertrain system includes an electric machine mechanically coupled to an internal combustion engine mechanically coupled to a transmission. A method for operating the powertrain system includes determining an engine stall threshold rate during engine operation in a low load condition. A time-rate change in an accessory load is controlled by the electric machine operating in an electric power generating mode in response to the engine stall threshold rate during the engine operation in the low load condition.