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A hydraulic excavator control system and method

A technology of hydraulic excavator and control method, which is applied to engine control, earth mover/shovel, mechanical equipment, etc., can solve the problems of reduced engine working efficiency and black smoke, and achieves reduction of fuel consumption and idle speed. , to avoid the effect of black smoke

Active Publication Date: 2021-07-13
XCMG EXCAVATOR MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a hydraulic excavator control system and method, to solve the problems in the prior art that the working efficiency of the engine is reduced when the engine is suddenly loaded in a low-load state and when the idling state is suddenly loaded. Technical problems with black smoke

Method used

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  • A hydraulic excavator control system and method
  • A hydraulic excavator control system and method
  • A hydraulic excavator control system and method

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Embodiment 1

[0024] Such as figure 1 Shown is a flow chart of a hydraulic excavator control method provided by an embodiment of the present invention, which mainly includes the following steps:

[0025] Collect the main oil circuit pressure value of the hydraulic excavator and the pilot pressure values ​​corresponding to the current action of the hydraulic excavator, and the controller The pilot pressure value of each channel obtains the required main pump power, and sends the required main pump power to the engine ECM; the controller can adjust the main pump power according to the required main pump power; the engine ECM can adjust the main pump power according to the described The required main pump power adjusts the fuel injection quantity of the engine, and the start time of the engine ECM to adjust the fuel injection quantity of the engine is earlier than the start time of the controller to adjust the main pump power.

[0026] The start time of the engine ECM to adjust the fuel injec...

Embodiment 2

[0029] Such as figure 2 As shown, it is a hydraulic principle diagram of a hydraulic excavator control system provided by the embodiment of the present invention, including: engine 10, main pump 11, pilot pump 12, electromagnetic proportional valve 13, main valve 14, hydraulic pilot handle 15, control device 16, a first pressure acquisition unit and a second pressure acquisition unit;

[0030] The engine 10 is connected with the main pump 11 and the pilot pump 12, and is used to provide power for the main pump 11 and the pilot pump 12;

[0031] The main valve 14 includes a walking spool 17, a rotary spool 18, a boom spool 19, a bucket spool 20 and a stick spool 21. After the outlet of the main pump 11 is connected to the inlet of the main valve 14 through a pipeline, It is connected with the travel spool 17, the rotary spool 18, the boom spool 19, the bucket spool 20 and the arm spool 21 in turn, supplying oil for each action spool to form the main oil circuit; the oil retur...

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Abstract

The invention discloses a control system and method for a hydraulic excavator. The method comprises a controller collecting an oil circuit pressure signal of the hydraulic excavator, and calculating the required main pump power by the oil circuit pressure signal; The pump power is sent to the engine ECM; the engine ECM first adjusts the engine fuel injection volume according to the required main pump power, and then the controller adjusts the main pump power according to the required main pump power. The invention greatly reduces the loading response time of the engine, improves the working efficiency of the whole machine, avoids the problem of black smoke during idling loading, can further reduce the idling speed of the engine, and reduces fuel consumption.

Description

technical field [0001] The invention relates to a hydraulic excavator control system and method, belonging to the technical field of excavators. Background technique [0002] The working conditions of hydraulic excavators are extremely complex, and the load changes greatly. When the load of the hydraulic pump increases, the engine increases the fuel injection quantity and the output torque increases, and the engine has a longer lag due to mechanical transmission. The engine will frequently appear in the following working states. First, when the engine is suddenly loaded at low load, the loading time is too long, resulting in a decrease in work efficiency; second, when the engine is suddenly loaded at idle, there will be black smoke. Most manufacturers will reduce the engine loading time by changing the oil-air mixing ratio of the engine combustion chamber, but at the same time there will be problems of insufficient combustion, black smoke from the engine, and black smoke fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D29/04E02F9/22
CPCE02F9/2246
Inventor 宋之克耿家文牛东东刘立祥王禄王绪通邢泽成宋吉魏红敏王青卞清荣蔺相伟吕传伟王顶
Owner XCMG EXCAVATOR MACHINERY
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