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:
Sep. 04, 2001
Filed:
Oct. 19, 1999
Brian D. Rockwood, Washington, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A method and system for controlling fluid flow from a hydraulic fluid supply via a single hydraulic pump in an electrohydraulic system having multiple hydraulic cylinders connected to the hydraulic pump and corresponding work implements includes input devices for generating input signals representative of a desired amount of movement of at least two of the work implements. A controller, coupled to the input devices and the cylinders, determines a scaling factor for each of the hydraulic circuits associated with each of the cylinders for compensating the hydraulic circuit for receiving less than maximum fluid flow from the pump. The controller also determines a desired percentage of fluid flow to each of the hydraulic circuits based on the desired amount of movement of the work implements and the corresponding scaling factors and controls the fluid flow from the fluid supply to each of the hydraulic circuits based on the desired percentages of fluid flow to allow for maximum fluid flow to each of the hydraulic circuits.