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Patent Searching and Data


Title:
DRIVE MERGE CONTROL SYSTEM FOR CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2013/094793
Kind Code:
A1
Abstract:
Disclosed is a drive merge control system for securing a driving speed by merging low RPM and a low-capacity pump discharge flow rate when driving a wheel-type excavator at a high speed. The present invention provides the drive merge control system comprising: first and second electronically controlled variable capacity hydraulic pumps; a hydraulic drive pedal; a work mode selection switch; a drive spool and at least one work device spool; a drive merge spool, which is installed on an upstream side of a flow path of the second hydraulic pump, for blocking a flow path of the first hydraulic pump and merging hydraulic oil of the second hydraulic pump with the hydraulic oil of the first hydraulic pump; a CBP spool, which is installed on the lower-most side of a downstream of the second hydraulic pump, for creating an actuation pressure on a tandem flow path of the second hydraulic pump; a first proportional control valve for supplying a secondary signal pressure, which is outputted so as to be proportionate to an external control signal, to each of the drive merge spool and the CBP spool; and a controller for controlling the RPM of a driving force generation device in correspondence with a drive signal pressure of the drive pedal, outputting the control signal to an electronic control valves that are provided on the first and second hydraulic pumps, and for outputting the control signal to the first proportional control valve.

Inventors:
LEE SANG-HEE (KR)
JOUNG HEA-GYOON (KR)
Application Number:
KR2011/010035
Publication Date:
June 27, 2013
Filing Date:
December 23, 2011
Export Citation:
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Assignee:
VOLVO CONSTR EQUIP AB (S-631 85, SE)
LEE SANG-HEE (KR)
JOUNG HEA-GYOON (KR)
International Classes:
F15B13/044; E02F9/22; F15B13/02; F15B21/08
Foreign References:
KR20070069849A2007-07-03
KR20000021360U
KR20100041100A2010-04-22
JP2007321972A2007-12-13
Attorney, Agent or Firm:
YOON, Eui-Seoup (135-080, KR)
윤의섭 (135-080, KR)
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Claims: