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:
Jan. 16, 2018
Filed:
May. 19, 2015
Caterpillar Inc., Peoria, IL (US);
Hongliu Du, Naperville, IL (US);
Ronald D. Shinogle, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A system for determining an estimated displacement of a variable displacement hydraulic pump includes a control cylinder associated with the swash plate of the variable displacement hydraulic pump to control the angle of inclination of the swash plate and a valve that controls the flow of hydraulic fluid to the control cylinder and has a position that defines an effective area of an opening of the valve. A pressure sensor generates pressure signals indicative of an output pressure from the variable displacement hydraulic pump. A controller is configured to receive pressure signals from the pressure sensor and determine an estimated displacement of the variable displacement hydraulic pump based upon the pressure signals from the pressure sensor and the position of the valve.