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Patent Searching and Data


Title:
SWIRL FLOW CONTROL SYSTEM FOR CONSTRUCTION EQUIPMENT AND METHOD OF CONTROLLING THE SAME
Document Type and Number:
WIPO Patent Application WO/2012/015087
Kind Code:
A1
Abstract:
Provided are a swirl flow control system for construction equipment and a method of controlling the same. The swirl flow control system includes: an engine; a plurality of actuators and rotation motors for a working device including a boom or arm and a bucket; a plurality of variable capacity type hydraulic pumps connected to the engine to provide an oil pressure into the actuators and rotation motors for the working device; a manipulation part including a manipulation lever and a joystick, the manipulation part controlling the movements of the plurality of actuators; a control valve respectively supplying the flows within the hydraulic pumps into the actuators and rotation motors by means of the manipulation part; a working device position detection unit disposed on a side of each of the actuators to detect a relative position of the actuator; a manipulation level detection unit disposed on a side of the manipulation part to detect a manipulated level of the manipulation lever or joystick; and a flow controller including a flow restriction part that receives signals from a flow setting part, the working device position detection unit, and an engine speed sensor to calculate a rate of increase for the flow, to thereby compensate for a swirl required flow rate and an output unit for providing a control signal into a swash plate control device, wherein the flow controller receives the signal detected by the manipulation level detection unit (9) to control a discharge flow rate for each of the hydraulic pumps.

Inventors:
KIM, Dong-Soo (1 Posco The Sharp Apt. Gyeonghwa-dong, Jinhae-si, Gyeongsangnam-do 645-752, 645-752, KR)
Application Number:
KR2010/005013
Publication Date:
February 02, 2012
Filing Date:
July 30, 2010
Export Citation:
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Assignee:
VOLVO CONSTRUCTION EQUIPMENT AB (SE Eskilstuna, 631 85, SE)
볼보 컨스트럭션 이큅먼트 에이비 (스웨덴 에스킬스투나, Eskilstuna, 631 85, SE)
International Classes:
F15B9/08; E02F9/22; F15B13/043
Foreign References:
JPH08219104A1996-08-27
JPH11230108A1999-08-27
KR20030087247A2003-11-14
JPH07138991A1995-05-30
JPH06257184A1994-09-13
Other References:
See also references of EP 2600010A4
None
Attorney, Agent or Firm:
YOON, Eui-Seoup (17th Floor, UNIK Bldg. 706-13Yeoksam-dong, Gangnam-gu, Seoul 135-080, 135-080, KR)
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Claims: