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. 24, 2006
Filed:
Dec. 07, 2004
Nobuhisa Honda, Oyama, JP;
Shuuji Hori, Oyama, JP;
Sadao Nunotani, Oyama, JP;
Naoki Ishizaki, Minamikawachi-machi, JP;
Hisashi Asada, Oyama, JP;
Nobuhisa Honda, Oyama, JP;
Shuuji Hori, Oyama, JP;
Sadao Nunotani, Oyama, JP;
Naoki Ishizaki, Minamikawachi-machi, JP;
Hisashi Asada, Oyama, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
The present invention lowers energy loss while at the same time enhancing the responsiveness of a steering control system. When a steering controller is operated rapidly, the aperture area of a steering flow control valverapidly increases, and the differential pressure (Pp'-PL) across the steering flow control valverapidly decreases. When the differential pressure (Pp′-PL) across the steering flow control valverapidly decreases, a flow control valveis biased by the spring force of a springand quickly moves to the side of a valve positionto increase the differential pressure (Pp′-PL) and make it correspond to a set pressure. Thus, the pressure oil of a surplus flow α, which up to this point has been flowing to a discharge oil line, is quickly supplied from the flow control valveto a steering hydraulic cylindervia the steering flow control valve. Thus, an output Q′ starts quickly relative to an input St.