Method for controlling driving speed of construction machinery
Inactive Publication Date: 2015-12-10
VOLVO CONSTR EQUIP
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Benefits of technology
The traveling speed control method for a construction machine described in this patent reduces the shock experienced when the machine moves quickly, which helps to reduce fatigue and improve workability for the operator. This is achieved by setting a low speed for the traveling apparatus, while maintaining the speed of the working apparatus. This also eliminates the need to adjust the engine's RPM to lower the speed of the traveling apparatus.
Problems solved by technology
In addition, when the traveling apparatus and the working apparatus are manipulated simultaneously to cause the traveling speed to be remarkably decreased, there is caused a problem in that a traveling shock is induced due to a reduction in the traveling speed to weigh an operator's fatigue, and the work efficiency is deteriorated due to a difficulty of the work upon the combined operation of the machine.
Method used
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[0027]Hereinafter, a traveling speed control method for a construction machine in accordance with a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. The matters defined in the description, such as the detailed construction and elements, are nothing but specific details provided to assist those of ordinary skill in the art in a comprehensive understanding of the invention, and the present invention is not limited to the embodiments disclosed hereinafter.
[0028]In order to definitely describe the present invention, a portion having no relevant to the description will be omitted, and through the specification, like elements are designated by like reference numerals.
[0029]In the specification and the claims, when a portion includes an element, it is meant to include other elements, but not exclude the other elements unless otherwise specifically stated herein.
[0030]FIG. 2 is a block diagram showing a configuration of a...
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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.
Description
TECHNICAL FIELD[0001]The present invention relates to a traveling speed control method for a construction machinery. More particularly, the present invention relates to such a traveling speed control method for a construction machine in which when a combined operation is performed in which the working apparatus is manipulated during the separate traveling of the machine, a sudden change in the traveling speed is prevented.BACKGROUND OF THE INVENTION[0002]FIG. 1 is a graph showing a discharge flow rate of hydraulic fluid discharged from a hydraulic pump when a working apparatus is manipulated during the traveling operation of the construction machine in accordance with the prior art.[0003]In general, an excavator performs an excavation operation and the like by manipulating left and right traveling apparatuses and a working apparatus including a boom and the like. In the case where the traveling apparatus or the working apparatus is manipulated separately depending on the working con...
Claims
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CPCE02F9/2253G05B2219/45012
Inventor LEE, CHUN-HAN
Owner VOLVO CONSTR EQUIP