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. 24, 2014
Filed:
Aug. 06, 2012
Kee Yong Kim, Ann Arbor, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
Samantha Victoria Lado, Pittsfield Township, MI (US);
Jeffrey J. Waldner, Brighton, MI (US);
Kee Yong Kim, Ann Arbor, MI (US);
Anthony H. Heap, Ann Arbor, MI (US);
Samantha Victoria Lado, Pittsfield Township, MI (US);
Jeffrey J. Waldner, Brighton, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method for operating a powertrain system to transfer torque among an engine, torque machines, and a driveline includes executing a search to determine a preferred engine operating point for operating the powertrain system in a transmission range in response to an output torque request. The search includes employing a candidate torque normalization ratio to determine a candidate engine torque from a normalized torque search space, and determining a candidate power cost associated with operating the powertrain system at the candidate engine torque for each of a plurality of candidate engine speeds within an input speed range and a plurality of candidate torque normalization ratios. A preferred engine speed is determined, and includes the candidate engine speed corresponding to the one of the candidate engine torques associated with a minimum of the candidate power costs. Engine operation is controlled responsive to the preferred engine speed.