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:
Dec. 12, 2017
Filed:
Mar. 19, 2014
Applicant:
Doosan Infracore Co., Ltd., Incheon, KR;
Inventors:
Assignee:
Doosan Infracore Co., Ltd., Incheon, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B 13/06 (2006.01); E02F 9/22 (2006.01); F15B 11/17 (2006.01);
U.S. Cl.
CPC ...
F15B 13/06 (2013.01); E02F 9/2228 (2013.01); E02F 9/2235 (2013.01); E02F 9/2267 (2013.01); E02F 9/2271 (2013.01); E02F 9/2292 (2013.01); E02F 9/2296 (2013.01); F15B 11/17 (2013.01); F15B 2211/20523 (2013.01); F15B 2211/20553 (2013.01); F15B 2211/20576 (2013.01); F15B 2211/25 (2013.01); F15B 2211/2656 (2013.01); F15B 2211/3111 (2013.01); F15B 2211/6346 (2013.01); F15B 2211/6652 (2013.01);
Abstract
Disclosed are a hydraulic system for construction equipment and a method of controlling the same, and the hydraulic system for construction equipment includes: a plurality of pressure control-type hydraulic pumps driven by an engine provided in construction equipment; an actuator driven by working oil discharged from the hydraulic pump; a closed center-type main control valve provided between the hydraulic pump and the actuator, and bypassing a virtual flow rate; and a controller configured to control the hydraulic pump by receiving the bypassed virtual flow rate from the main control valve.