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:
Mar. 20, 2012
Filed:
Sep. 15, 2008
Bradley Bailey, Peoria, IL (US);
Matthew Hendrickson, Peoria, IL (US);
William J. Tate, Dunlap, IL (US);
Walter E. Earleson, Morton, IL (US);
Jeffrey A. Brand, Chillicothe, IL (US);
Bradley Bailey, Peoria, IL (US);
Matthew Hendrickson, Peoria, IL (US);
William J. Tate, Dunlap, IL (US);
Walter E. Earleson, Morton, IL (US);
Jeffrey A. Brand, Chillicothe, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
An electric drive system includes a fuel-driven engine () driving an electrical power generator () that provides power to one or more electric drive motors (). A method of load management in the electric drive system includes receiving an actual fuel signal, an engine speed () signal, a throttle position signal, a motor speed () signal, an intake air pressure, a barometric pressure signal, and an intake air temperature signal. These values are used to determine a torque limit. The torque limit is used to limit a torque command to the electric drive motors () such that the torque command is consistent with the operating capabilities of the engine ().