CN117868253A - Excavator power compensation and fault diagnosis method - Google Patents
Excavator power compensation and fault diagnosis method Download PDFInfo
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- CN117868253A CN117868253A CN202410226054.3A CN202410226054A CN117868253A CN 117868253 A CN117868253 A CN 117868253A CN 202410226054 A CN202410226054 A CN 202410226054A CN 117868253 A CN117868253 A CN 117868253A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000003745 diagnosis Methods 0.000 title claims abstract description 9
- 230000009471 action Effects 0.000 claims abstract description 25
- 238000013329 compounding Methods 0.000 claims abstract description 9
- 238000005299 abrasion Methods 0.000 claims description 15
- 230000009467 reduction Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims 1
- 230000006870 function Effects 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2062—Control of propulsion units
- E02F9/2066—Control of propulsion units of the type combustion engines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/26—Indicating devices
- E02F9/267—Diagnosing or detecting failure of vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention discloses an excavator power compensation and fault diagnosis method, which comprises the following steps: selecting a power matching mode, entering power matching control, controlling a full-electric control handle to perform operation and action compounding, and calibrating the current electric control main pump power after the action is finished; changing the power of the electric control main pump by adjusting the electric control main pump current value; if the adjusted electric control main pump current value exceeds a preset current threshold value, outputting the preset current threshold value as a final current value Ip; if the adjusted electric control main pump current value does not exceed the preset current threshold value, changing the electric control main pump power again by adjusting the electric control main pump current value according to the magnitude relation between the engine torque load rate T and the preset load rate. And judging whether the engine fault or the electric control main pump fault is caused according to the magnitude relation between the final current value Ip of the electric control main pump and the factory current value. The invention can realize the matching of the whole life cycle of the engine and the hydraulic system, and deduce the fault problem point through the current value.
Description
Technical Field
The invention relates to an excavator power compensation and fault diagnosis method, and belongs to the technical field of excavators.
Background
In the field of excavators, for an electronic injection engine, the abrasion inevitably leads to power attenuation along with the use of the engine, meanwhile, the hydraulic pump also has the same abrasion along with the use, and the loss of abrasion is asynchronous, if the loss of the engine is small, the loss of hydraulic pressure is large, so that the power of the engine is wasted, and the excavating efficiency is low; otherwise, the engine loss is big, and hydraulic loss is little, can lead to the engine to hold down the car and fall fast, influences user's perception. For an electronic injection engine, the real attenuated power of the engine cannot be accurately controlled and calculated, the attenuation of a hydraulic pump along with time is closely related to the use condition of a user, no accurate prediction formula exists, the existing excavator industry basically only reports problems, the user finds service personnel to process the problems, but the problems are very difficult to find and process, and a large amount of manpower and material resources are wasted. For the worn real power value of the pump power, only the vehicle can be disassembled, and the worn pump power is calibrated on a special test bed.
At present, an electronic injection engine is used for an excavator, a full-electric control hydraulic system is matched, and power matching control of a full life cycle cannot be achieved except initial matching of product research and development. The occurrence of the matching fault is difficult to analyze and judge for the first-line service, so that the maintenance and the treatment for service personnel are very difficult as long as the engine and the hydraulic system are matched with each other, and a great amount of manpower and material resources are wasted. The power value of the worn pump can be calibrated only on a special test bed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a power compensation and fault diagnosis method for an excavator, which is used for calibrating the power of a worn hydraulic main pump, realizing the matching of the whole life cycle of an engine and a hydraulic system and deducing a fault point through a current value.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
in a first aspect, the present invention provides a method for power compensation of an excavator, comprising:
selecting a power matching mode, entering a power matching control,
controlling the full electric control handle to compound operation actions, and calibrating the current electric control main pump power after the actions are completed;
changing the power of the electric control main pump by adjusting the electric control main pump current value;
if the adjusted electric control main pump current value exceeds a preset current threshold value, outputting the preset current threshold value as a final current value Ip;
if the adjusted electric control main pump current value does not exceed the preset current threshold value, changing the electric control main pump power again by adjusting the electric control main pump current value according to the magnitude relation between the engine torque load rate T and the preset load rate.
Further, the power matching mode comprises automatic matching, user-defined matching and forced self-learning matching every t hours.
Further, by adjusting the electric control main pump current value, changing the electric control main pump power includes:
increasing pump power control logic: increasing current and improving the power of an electric control main pump;
and, reducing pump power control logic to: the current is reduced, and the power of the electric control main pump is reduced.
Further, the boost pump power control logic includes: after the current is increased,
if the current value of the electric control main pump is more than or equal to a preset high current threshold value Ipmax, outputting the preset high current threshold value Ipmax as a final current value Ip;
if the electric control main pump current value is smaller than a preset high current threshold value Ipmax, detecting the engine torque load rate T;
if the engine torque load rate T is less than the preset first load rate T1, continuing to execute the pump power increasing control logic;
and if the engine torque load rate T is more than or equal to the preset first load rate T1, executing the pump power reduction control logic.
The preset first load rate t1 is the highest load rate set in consideration of fuel consumption, and is generally not more than 80%.
Further, the pump power reduction control logic includes: after the current has been reduced,
if the electric control main pump current value is less than or equal to a preset low current threshold value Ipmin, outputting the preset low current threshold value Ipmin as a final current value Ip;
if the electric control main pump current value is larger than a preset low current threshold value Ipmin, detecting an engine torque load rate T;
if the engine torque load rate T is less than the preset second load rate T2, outputting the current value as a final current value Ip;
if the engine torque load rate T is greater than or equal to the preset second load rate T2, continuing to execute the pump power reduction control logic.
The preset second load rate t2 may be the lowest value allowed by the efficiency of the actual test.
Further, the operation and action combination may be double action combination, for example, combination of single action arm holding pressure and single action bucket action, or may be triple action combination.
Further, the set rotational speeds of the power matching control process are all learned.
Further, the power matching control further comprises factory setting restoration, and if the result is not satisfied after automatic matching, the factory setting restoration can be selected, and the electric control main pump current value is directly forcedly restored to an initial value.
In a second aspect, the present invention provides a method for diagnosing an excavator fault, based on the method for compensating power of an excavator in the first aspect, according to the magnitude relation between the final current value Ip of the electric control main pump and the factory current value, determining that the excavator is an engine fault or an electric control main pump fault.
Further, if the final current value Ip of the electric control main pump is larger than the factory current, judging that the abrasion of the engine is small, the abrasion of the electric control main pump is large, or the electric control main pump body fails;
if the final current value Ip of the electric control main pump is smaller than the factory current, the electric control main pump is judged to be small in abrasion, large in abrasion of the engine or faulty in the engine body.
Compared with the prior art, the invention has the beneficial effects that:
according to the excavator power compensation method, the electric control main pump current is adjusted to adjust the electric control main pump power, the engine change is matched, full life cycle matching is achieved, the full life cycle power utilization efficiency of the engine is improved, and user perception is improved; the main pump power is adopted to match the torque load rate of the engine instead of the limit of the engine, so that the load rate is high, the efficiency of the whole excavator is ensured, and the fuel consumption economy of the excavator is ensured due to the small load rate;
according to the fault diagnosis method for the excavator, disclosed by the invention, the fault can be prejudged through the current value after power compensation, and the waste of manpower and material resources is reduced.
Drawings
FIG. 1 is a flow chart of an excavator power compensation method provided in embodiment 1 of the present invention;
fig. 2 is a system diagram of a method according to an embodiment of the invention.
Detailed Description
The following detailed description of the technical solutions of the present invention is made by the accompanying drawings and specific embodiments, and it should be understood that the specific features of the embodiments and embodiments of the present application are detailed descriptions of the technical solutions of the present application, and not limiting the technical solutions of the present application, and the technical features of the embodiments and embodiments of the present application may be combined with each other without conflict.
The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
Example 1
Fig. 1 is a flowchart of an excavator power compensation method in embodiment 1 of the present invention. The flow chart merely shows the logical sequence of the method according to the present embodiment, and the steps shown or described may be performed in a different order than shown in fig. 1 in other possible embodiments of the invention without mutual conflict.
The excavator power compensation method provided by the embodiment can be applied to a terminal, and can be executed by an excavator power compensation device, the device can be implemented by software and/or hardware, and the device can be integrated in the terminal, for example: any smart phone, tablet computer or computer device with communication function.
The invention comprises a system which is composed of an all-electric control pilot handle, an electric control main valve, an electric control main pump and an all-electric injection engine, as shown in figure 2.
Referring to fig. 1, the method of the present embodiment specifically includes the following steps:
s1, selecting a power matching mode, and entering power matching control
After the operator gets on the engine, the engine ignites, and four options exist: (1) automatically matching every t hours; (2) user-defined matching: the user can start automatic matching in advance according to the own demand, the function is not approved, and the function can be closed automatically; (3) forced self-learning matching: after the problem is fed back by the user, the service personnel can force automatic matching (such as adding an automatic upgrading function, and can directly force learning automatically through a background); (4) restoring factory settings: if the result is not satisfied after the automatic matching, the user can choose to restore the factory setting, and the electric control main pump current value is directly forcedly restored to the initial value.
S2, controlling the full-electric control handle to conduct operation and action compounding, and calibrating current electric control main pump power after the action is completed
If one of three commands of user definition and forced self-learning is selected every t hours, the visual self-definition action is carried out, the full electric control handle is controlled to carry out operation action compounding, and double action compounding can be carried out, for example, single action movable arm pressure holding and single action bucket action compounding can be carried out, and three action compounding can be carried out; after the specified action is completed, the current electric control main pump power can be calibrated.
The method comprises the following steps: and (3) performing actions according to the prompt of the instrument, obtaining the engine load rate, calculating a power value according to the engine load rate, removing accessory power, and obtaining the current value of the main pump corresponding to the current value.
S3, changing the power of the electric control main pump by adjusting the current value of the electric control main pump
The step includes raising the pump power control logic and lowering the pump power control logic, and the control logic process is all learned with all set rotation speeds.
First, the control logic for improving the pump power is entered, so that the maximum available power of the engine can be effectively utilized, and the control logic specifically comprises the following steps:
increasing the current value of the electric control main pump, and increasing the power of the electric control main pump by P kilowatts;
if the current value of the electric control main pump is more than or equal to a preset high current threshold value Ipmax, outputting the preset high current threshold value Ipmax as a final current value Ip;
if the electric control main pump current value is smaller than a preset high current threshold value Ipmax, detecting the engine torque load rate T;
if the engine torque load rate T is less than the preset first load rate T1, continuing to execute the pump power increasing control logic;
and if the engine torque load rate T is more than or equal to the preset first load rate T1, executing the pump power reduction control logic. The preset first load rate t1 is the highest load rate set in consideration of fuel consumption, and is generally not more than 80%.
After entering the pump power reduction control logic, the method specifically comprises the following steps:
reducing the current value of the electric control main pump, and reducing the power of the electric control main pump by P kilowatts;
if the electric control main pump current value is less than or equal to a preset low current threshold value Ipmin, outputting the preset low current threshold value Ipmin as a final current value Ip;
if the electric control main pump current value is larger than a preset low current threshold value Ipmin, detecting an engine torque load rate T;
if the engine torque load rate T is less than the preset second load rate T2, outputting the current value as a final current value Ip;
if the engine torque load rate T is greater than or equal to the preset second load rate T2, continuing to execute the pump power reduction control logic. The preset second load rate t2 may be the lowest value allowed by the efficiency of the actual test.
Example 2
The embodiment provides an excavator fault diagnosis method, which is based on the excavator power compensation method described in embodiment 1, and specifically includes:
and judging whether the engine fault or the electric control main pump fault is caused according to the magnitude relation between the final current value Ip of the electric control main pump and the factory current value.
If the final current value Ip of the electric control main pump is larger than the factory current, the engine can be primarily judged to be small in abrasion, and the electric control main pump is large in abrasion, or the electric control main pump body fails;
if the final current value Ip of the electric control main pump is smaller than the factory current, the electric control main pump can be primarily judged to be small in abrasion, large in abrasion of the engine or faulty in engine body.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (10)
1. An excavator power compensation method, comprising:
selecting a power matching mode, entering a power matching control,
controlling the full electric control handle to compound operation actions, and calibrating the current electric control main pump power after the actions are completed;
changing the power of the electric control main pump by adjusting the electric control main pump current value;
if the adjusted electric control main pump current value exceeds a preset current threshold value, outputting the preset current threshold value as a final current value Ip;
if the adjusted electric control main pump current value does not exceed the preset current threshold value, changing the electric control main pump power again by adjusting the electric control main pump current value according to the magnitude relation between the engine torque load rate T and the preset load rate.
2. The method of claim 1, wherein the power matching pattern comprises automatic matching every t hours, user-defined matching, and forced self-learning matching.
3. The excavator power compensation method of claim 1 wherein varying the electronically controlled main pump power by adjusting the electronically controlled main pump current value comprises:
increasing pump power control logic: increasing current and improving the power of an electric control main pump;
and, reducing pump power control logic to: the current is reduced, and the power of the electric control main pump is reduced.
4. The method of power compensation for an excavator of claim 3 wherein the step of increasing the pump power control logic comprises: after the current is increased,
if the current value of the electric control main pump is more than or equal to a preset high current threshold value Ipmax, outputting the preset high current threshold value Ipmax as a final current value Ip;
if the electric control main pump current value is smaller than a preset high current threshold value Ipmax, detecting the engine torque load rate T;
if the engine torque load rate T is less than the preset first load rate T1, continuing to execute the pump power increasing control logic;
and if the engine torque load rate T is more than or equal to the preset first load rate T1, executing the pump power reduction control logic.
5. The method of power compensation for an excavator of claim 3 wherein the reducing pump power control logic comprises: after the current has been reduced,
if the electric control main pump current value is less than or equal to a preset low current threshold value Ipmin, outputting the preset low current threshold value Ipmin as a final current value Ip;
if the electric control main pump current value is larger than a preset low current threshold value Ipmin, detecting an engine torque load rate T;
if the engine torque load rate T is less than the preset second load rate T2, outputting the current value as a final current value Ip;
if the engine torque load rate T is greater than or equal to the preset second load rate T2, continuing to execute the pump power reduction control logic.
6. The excavator power compensation method of claim 1 wherein the operational action compounding comprises a dual action compounding or a three action compounding.
7. The excavator power compensation method of claim 1 wherein the power match control process set rotational speed is learned in its entirety.
8. The excavator power compensation method of claim 1 wherein the power match control further comprises restoring factory settings and forcibly restoring the electronically controlled main pump current values to initial values.
9. An excavator fault diagnosis method, characterized in that based on the excavator power compensation method of any one of claims 1-8, the engine fault or the electric control main pump fault is judged according to the magnitude relation between the final current value Ip of the electric control main pump and the factory current value.
10. The excavator fault diagnosis method according to claim 9, wherein,
if the final current value Ip of the electric control main pump is larger than the factory current, judging that the abrasion of the engine is small, the abrasion of the electric control main pump is large, or the electric control main pump body fails;
if the final current value Ip of the electric control main pump is smaller than the factory current, the electric control main pump is judged to be small in abrasion, large in abrasion of the engine or faulty in the engine body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410226054.3A CN117868253A (en) | 2024-02-29 | 2024-02-29 | Excavator power compensation and fault diagnosis method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410226054.3A CN117868253A (en) | 2024-02-29 | 2024-02-29 | Excavator power compensation and fault diagnosis method |
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| CN117868253A true CN117868253A (en) | 2024-04-12 |
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| CN202410226054.3A Pending CN117868253A (en) | 2024-02-29 | 2024-02-29 | Excavator power compensation and fault diagnosis method |
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| Country | Link |
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| CN (1) | CN117868253A (en) |
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- 2024-02-29 CN CN202410226054.3A patent/CN117868253A/en active Pending
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