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:
Dec. 16, 2014
Filed:
May. 06, 2011
Applicants:
Hongliu Du, Naperville, IL (US);
Patrick W. Sullivan, Tinley Park, IL (US);
Inventors:
Hongliu Du, Naperville, IL (US);
Patrick W. Sullivan, Tinley Park, IL (US);
Assignee:
Caterpillar Inc., Peoria, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 43/12 (2006.01); F04B 49/06 (2006.01); F04B 49/00 (2006.01); F04B 41/06 (2006.01); F16D 33/02 (2006.01); G05D 7/00 (2006.01); G05D 11/06 (2006.01); F04B 23/06 (2006.01);
U.S. Cl.
CPC ...
F04B 23/06 (2013.01); F04B 49/002 (2013.01); F04B 2205/09 (2013.01); F04B 49/06 (2013.01);
Abstract
Methods, apparatuses, and computer program products for controlling the torque load of multiple variable displacement hydraulic pumps are described herein. A pump displacement limit for each variable displacement hydraulic pump is determined using a nonlinear control law to limit the total pump torque load of the variable displacement hydraulic pumps on the engine. The value of the actual pump displacement of each variable displacement hydraulic pump is controlled based upon the respective determined pump displacement limit.