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:
Oct. 15, 2009
Donald Chan, Farmington Hills, MI (US);
William L. Aldrich, Iii, Davisburg, MI (US);
John L. Lahti, Novi, MI (US);
Birendra P. Bhattarai, Novi, MI (US);
Krunal P. Patel, Sterling Heights, MI (US);
Ning Jin, Novi, MI (US);
Donald Chan, Farmington Hills, MI (US);
William L. Aldrich, III, Davisburg, MI (US);
John L. Lahti, Novi, MI (US);
Birendra P. Bhattarai, Novi, MI (US);
Krunal P. Patel, Sterling Heights, MI (US);
Ning Jin, Novi, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method for optimizing an engine idle speed in a vehicle having an engine, a motor generator unit (MGU), and an energy storage system (ESS) includes determining vehicle operating values, including at least one of: an electrical load of an accessory, a torque capacity of the MGU, a temperature of the MGU, an efficiency of the MGU, and a state of charge (SOC) of the ESS. The method also includes calculating a set of engine speed values using the set of vehicle operating values, and using a controller to command the engine idle speed as a function of the set of engine speed values. A vehicle includes an engine, an ESS, an MGU, and a controller having an algorithm adapted for optimizing an idle speed of the engine as set forth above.