Title:
METHOD FOR CONTROLLING DRIVING SPEED OF CONSTRUCTION MACHINERY
Document Type and Number:
WIPO Patent Application WO/2014/115905
Kind Code:
A1
Abstract:
Disclosed is a method for controlling a driving speed of construction machinery for preventing a sudden change in the driving speed during a combined operation for operating a work device while driving an excavator. The method for controlling the driving speed of the construction machinery, according to one embodiment of the present invention, relates to the method for controlling the driving speed of the construction machinery comprising a lower driving body, a turning device for turning an upper turning body with respect to the lower driving body, a driving device, the work device, an electronic proportional valve for controlling the discharge flow rate of a hydraulic pump, and a controller. The method comprises: a first step of detecting the amount of operation of the driving device, the work device, and the turning device according to the operation of same; a second step of calculating a required working oil flow rate corresponding to the amount of operation of the driving device, the work device, and the turning device; a third step of reducing the required working oil flow rate of the driving device calculated in the second step, according to a ratio set by a driver, so that an independent maximum driving speed of the driving device can be reduced by the setting by the driver; and a fourth step of combining the required working oil flow rates calculated in the second step and the third step, and outputting a control signal to the electronic proportional valve so that the combined flow rate is discharged from the hydraulic pump.
Inventors:
LEE CHUN-HAN (KR)
Application Number:
PCT/KR2013/000532
Publication Date:
July 31, 2014
Filing Date:
January 23, 2013
Export Citation:
Assignee:
VOLVO CONSTR EQUIP AB (SE)
LEE CHUN-HAN (KR)
LEE CHUN-HAN (KR)
International Classes:
E02F9/22; E02F9/02
Foreign References:
| KR100621985B1 | 2006-09-11 | |||
| KR20090103082A | 2009-10-01 | |||
| KR100611714B1 | 2006-08-11 | |||
| US7757486B2 | 2010-07-20 | |||
| KR19990059489A | 1999-07-26 |
Other References:
None
Attorney, Agent or Firm:
YOON, Eui-Seoup (KR)
윤의섭 (KR)
윤의섭 (KR)
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