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:
Oct. 23, 2001
Filed:
Sep. 07, 1999
Applicant:
Inventors:
Assignee:
Komatsu Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16H 3/904 ;
U.S. Cl.
CPC ...
F16H 3/904 ;
Abstract
A method and system for controlling a hydraulic driving circuit, which are simple in structure, capable of readily providing neutral position adjustment, manually adjustable and able to cope with a failure in the circuit. When an adjustment mode for adjusting the neutral position of a steering hydraulic pump is set, an offset command current value is calculated as a command current value to be output to a servo electromagnetic valve, and an offset command value calculated when a steering lever is in its neutral position is output to the servo electromagnetic valve to adjust the neutral position of the steering hydraulic pump.