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. 06, 2020
Filed:
Apr. 27, 2018
Kawasaki Jukogyo Kabushiki Kaisha, Kobe-shi, Hyogo, JP;
Hideyasu Muraoka, Akashi, JP;
Tomomichi Nose, Akashi, JP;
KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe, JP;
Abstract
A hydraulic driving system includes a flow control valve device, a bleed-off valve device, a discharge pressure sensor, a relief valve, an operating element, and a controller. The controller executes calibration in which: in a state where the bleed-off valve device blocks between a hydraulic pump and a tank, the controller changes a movement command current supplied to the flow control valve device and makes the discharge pressure sensor detect a discharge pressure; the controller detects at least one of an opening start current that is a current when the flow control valve device starts opening and a closing completion current that is a current when closing of the flow control valve device is completed; and based on the detected at least one current, the controller adjusts a correspondence relation between an operation amount of the operating element and the at least one current.