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. 25, 2014
Filed:
Aug. 06, 2012
Anthony H. Heap, Ann Arbor, MI (US);
Kee Yong Kim, Ann Arbor, MI (US);
Yaoyao Wei, Novi, MI (US);
Alexander K. Rustoni, Oxford, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
Kee Yong Kim, Ann Arbor, MI (US);
Yaoyao Wei, Novi, MI (US);
Alexander K. Rustoni, Oxford, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A multi-mode powertrain system employing a power-split configuration to transfer torque to a driveline includes an internal combustion engine fluidly coupled to an exhaust aftertreatment system having a catalytic device. A method for controlling the multi-mode powertrain system includes identifying permitted transition paths between a plurality of engine states. The plurality of engine states includes a default state, a pre-light-off state, a light-off state, and a post-light-off state. A preferred one of the plurality of engine states is selected in response to an output torque request and an operating temperature of the catalytic device. Engine operation is transitioned to the preferred one of the plurality of engine states via the permitted transition paths, and the engine is operated in the preferred one of the plurality of engine states.