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Method and device for controlling engine of load-based crawler crane

A crawler crane and engine technology, applied in the field of load-based crawler crane engine control, can solve problems such as fuel waste

Active Publication Date: 2014-02-05
XCMG CONSTR MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The biggest problem with this method is that the operator cannot judge the reasonable speed that should be controlled by the throttle under the current load condition, which causes unnecessary waste of fuel.

Method used

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  • Method and device for controlling engine of load-based crawler crane
  • Method and device for controlling engine of load-based crawler crane
  • Method and device for controlling engine of load-based crawler crane

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Embodiment Construction

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0051] The relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0052] At the same time, it should be understood that, for the convenience of d...

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Abstract

The invention discloses a method and a device for controlling an engine of a load-based crawler crane. According to the method, a working curve of the engine in a working mode which is selected by a working mode selection unit and a maximum rotating speed corresponding to the working curve are determined, and a demanded power of a pump is limited to be smaller than an output power of the engine at the current rotating speed while the current rotating speed of the engine in the selected working mode can be limited to be smaller than the maximum rotating speed of the engine in the selected working mode. According to the method and the device, different engine working modes are selected, different pre-calibrated engine characteristic curves are selected to be matched with a hydraulic system, and the maximum rotating speeds in different working modes are limited, so that the contradiction between the speed of a mechanism and the fuel economy of the engine when the crane is light-load and high-speed is mainly solved, and the engine can also be accurately controlled.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a load-based crawler crane engine control method and device. Background technique [0002] At present, crawler cranes mostly use electronically controlled diesel engines, and the ECU (Electronic Control Unit, Electronic Control Unit) of the engine communicates with the PLC (Programmable Logic Controller, Programmable Logic Controller) of the crane through the 1939 bus. The communication content mainly involves the monitoring of the basic state parameters of the engine by the crane PLC, mainly including: oil pressure, water temperature, working time and some other engine alarm indications. The control of the engine by the crane PLC is mainly reflected in the control of the speed of the engine and the control of the limit power of the engine. For example: figure 1 It is a schematic diagram of the method for controlling the demand power of the hydraulic pump by the PLC of the ...

Claims

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Application Information

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IPC IPC(8): B66C13/20
Inventor 李鹏余钦伟贾健张红松陈远泽
Owner XCMG CONSTR MACHINERY
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