SWIRL FLOW CONTROL SYSTEM FOR CONSTRUCTION EQUIPMENT AND METHOD OF CONTROLLING THE SAME

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 (KR)

Application Number:

PCT/KR2010/005013

Publication Date:

February 02, 2012

Filing Date:

July 30, 2010

Export Citation:

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Assignee:

VOLVO CONSTR EQUIP AB (SE)
KIM DONG-SOO (KR)

International Classes:

E02F9/22; F15B9/08; F15B13/043

Foreign References:

JPH08219104A	1996-08-27
JPH11230108A	1999-08-27
KR20030087247A	2003-11-14
JPH07138991A	1995-05-30
JPH06257184A	1994-09-13

Other References: