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:
Jul. 29, 2025
Filed:
Mar. 31, 2021
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Kento Kumagai, Ami-machi, JP;
Shinya Imura, Toride, JP;
Yasutaka Tsuruga, Ryugasaki, JP;
Takaaki Chiba, Kasumigaura, JP;
Hiroaki Amano, Tsukuba, JP;
Shinji Nishikawa, Kasumigaura, JP;
Akihiro Narazaki, Tsukuba, JP;
Genroku Sugiyama, Ryugasaki, JP;
Shinjiro Yamamoto, Ami-machi, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
An object of the present invention is to provide a work machine that can increase the operation speed of an actuator by a regenerating function while ensuring accuracy of position control of the actuator. For this purpose, a controller computes a target actuator supply flow rate by subtracting a regeneration flow rate from a target actuator flow rate, computes a target flow control valve opening amount on the basis of the target actuator supply flow rate, computes a target pump flow rate equal to or more than the sum of a plurality of the target actuator supply flow rates, controls flow control valves according to the target flow control valve opening amount, and controls a hydraulic pump according to the target pump flow rate.