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Control method for construction machinery and control system for construction machinery

A technology of construction machinery and control methods, applied in engine control, pump control, electrical control, etc., can solve problems such as workability and operability decline, and achieve the effect of improving fuel efficiency and productivity

Active Publication Date: 2021-08-17
DOOSAN INFRACORE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, there is a problem that workability and operability are degraded when the work speed required for the work changes

Method used

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  • Control method for construction machinery and control system for construction machinery
  • Control method for construction machinery and control system for construction machinery
  • Control method for construction machinery and control system for construction machinery

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Embodiment Construction

[0038] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0039] In each drawing of the present invention, for the sake of clarity of the present invention, the size of the structure is shown enlarged than the actual size.

[0040] In the present invention, terms such as first and second may be used to describe various constituent elements, but these constituent elements should not be limited by these terms. These terms are used only for the purpose of distinguishing one constituent element from another constituent element.

[0041] The terms used in the present invention are used only to describe specific embodiments, and are not intended to limit the present invention. Expressions in the singular include expressions in the plural unless clearly defined differently in the context. In this application, terms such as "comprising" or "having" should be understood as intended to specify the existence o...

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Abstract

The invention provides a control method for construction machinery. According to the control method, an operation performed by the construction machinery is divided into a plurality of subordinate works; a current subordinate work currently performed by the construction machinery is determined; a maximum absorbing torque of a hydraulic pump is adjusted according to the determined subordinate work; and an engine speed change map is adjusted according to the determined subordinate work.

Description

technical field [0001] The invention relates to a control method of construction machinery and a control system of construction machinery. In more detail, it relates to a method for controlling an engine and a hydraulic pump in a construction machine such as an excavator and a control system for the construction machine for performing the method. Background technique [0002] Generally, in a construction machine such as an excavator, an engine is provided as a prime mover, and at least one variable displacement type hydraulic pump can be rotationally driven by the engine, and a hydraulic driver can be driven by pressure oil discharged from the hydraulic pump to Execute the required jobs. [0003] When the operator directly judges and selects the power mode of the hydraulic pump according to the work situation, he can select the power mode that meets the maximum load condition. However, when only a part of the repeatedly executed work contents is a high-load region and most...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/22
CPCE02F9/2246E02F3/435E02F9/2296E02F9/2235F02D29/04F02D31/001F02D41/021E02F9/2062E02F9/2221E02F9/2271F04B17/05F04B49/20
Inventor 郑雨容孙元旋房在锡
Owner DOOSAN INFRACORE CO LTD