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:
Aug. 16, 2011
Filed:
May. 12, 2008
Jiao Zhang, Naperville, IL (US);
Benjamin Yoo, Morton, IL (US);
Aleksandar M. Egelja, Naperville, IL (US);
Tonglin Shang, Bolingbrook, IL (US);
Matthew James Beschorner, Plainfield, IL (US);
Jiao Zhang, Naperville, IL (US);
Benjamin Yoo, Morton, IL (US);
Aleksandar M. Egelja, Naperville, IL (US);
Tonglin Shang, Bolingbrook, IL (US);
Matthew James Beschorner, Plainfield, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A method of calibrating an electrically controlled hydraulic valve having a known relationship between flow rate through the valve and displacement of a valve element is disclosed. The method includes ascertaining a first current level for actuating the electrically controlled hydraulic valve to move the valve element to a position adjacent an inlet port, and a first displacement of the valve element responsive to the first current level. The method also includes ascertaining a second current level for actuating the electrically controlled hydraulic valve to move the valve element from the position adjacent the inlet port to a position permitting flow through the inlet port, and ascertaining a second displacement of the valve element responsive to the second current level. The method further includes establishing a relationship between current and displacement associated with the electrically controlled hydraulic valve.