Hydraulic excavator starting abnormity diagnosis method, storage medium and equipment

Abstract

The invention discloses a hydraulic excavator starting abnormity diagnosis method, a storage medium and equipment, and relates to the technical field of excavators. In a starting state preparation stage, analysis is carried out through an instrument end data analysis unit; after the starting state preparation stage is completed, the starting data acquisition and storage unit records engine rotating speed and storage battery voltage signal data in the starting process; performing logic analysis and judgment on the data recorded by the starting data acquisition and storage unit; and a result output by the starting abnormal data diagnosis and analysis unit is output to an instrument display analysis result unit to display starting abnormal reasons, and the sequence of analysis of the starting abnormal data diagnosis and analysis unit is checked. According to the method, starting abnormity is classified by recognizing relevant parameters, such as the engine rotating speed, the storage battery voltage and the sudden stop state, influencing the starting performance in the starting process, different troubleshooting schemes are output according to different classifications, troubleshooting omission or misjudgment is avoided, and therefore the problem of starting abnormity is rapidly solved.

Description

Technical Field

[0001] This invention relates to the field of excavator technology, specifically to a method, storage medium, and device for diagnosing abnormal starting of a hydraulic excavator. Background Technology

[0002] The starting process of a diesel engine in a hydraulic excavator involves the coordination of the electrical, engine, and hydraulic systems. Faults in some common single systems can be identified through fault codes. However, when starting abnormalities occur in the market, there are often no fault codes, and due to the complexity of the systems involved, the multiple possible causes of the fault, and the complicated disassembly process, it is difficult to accurately determine the cause. Current technologies mainly rely on experience or data analysis to troubleshoot, which is time-consuming, labor-intensive, and requires a certain level of technical analysis, hindering market service personnel from quickly resolving problems. Summary of the Invention

[0003] The purpose of this invention is to provide a method, storage medium, and device for diagnosing abnormal starting of a hydraulic excavator, in order to solve the problems in the prior art mentioned in the background section.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a method for diagnosing abnormal starting of a hydraulic excavator, comprising: When the key switch is turned on, the system enters the start-up preparation stage and is analyzed by the data analysis unit on the instrument panel. After the start-up preparation phase is completed, the start-up data acquisition and storage unit records the engine speed and battery voltage signal data during the start-up process. The startup anomaly data diagnosis and analysis unit performs logical analysis and judgment on the data recorded by the startup data acquisition and storage unit. The results output from the instrument display unit and the start-up anomaly data diagnosis and analysis unit are displayed in the instrument display and analysis results unit to show the cause of the start-up anomaly and / or to check the order of analysis by the start-up anomaly data diagnosis and analysis unit.

[0005] Preferably, during the start-up preparation phase, the judgment is made by the instrument-side data analysis unit as follows: Is the current ambient temperature within the permissible ambient temperature threshold for the entire machine? Among them, if the flow continues after reaching the ambient temperature threshold, otherwise the non-compliance item will be output through the instrument display unit; After determining the ambient temperature threshold, it checks whether the emergency stop switch of the whole machine should be reset when the ambient temperature threshold is reached. Among them, when the engine is in the reset state, fault codes affecting engine starting are judged; otherwise, non-compliance items are output through the instrument display unit. When a fault code affecting engine starting appears, the fault code affecting engine starting is cleared, the start-up preparation stage is completed, and starting is allowed. If the fault code affecting engine starting is not cleared, the non-compliance item will be output through the instrument display unit.

[0006] Preferably, the starting data acquisition and storage unit records engine speed and battery voltage signal data during the starting process, specifically including: During the start-up preparation phase, if the vehicle is not found after multiple attempts or is briefly started and then shut off, record the engine speed and battery voltage signal during the three start-up attempts. Data is sent to the start-up anomaly data diagnostic analysis unit to determine whether the start-up protection strategy of the engine or the whole machine has been triggered during the start-up process; When triggered, a notification is sent to the instrument display unit for display. If no trigger is found, the abnormal starting situation is determined by combining the speed signal during the starting process.

[0007] Preferably, the starting protection strategy for the engine or the entire machine is specifically divided into the following situations: If the towing speed is 0 ≤ n1 < n0, the engine will not start. If the towing speed is n1≥n0, the engine will not start; After a successful start, briefly start the engine and then turn it off.

[0008] Preferably, when the towing speed is 0 ≤ n1 < n0 and the engine is not running, the analysis and judgment specifically include: When 0 ≤ n1 < n0, determine whether n1 is 0; When n1=0, continue to determine whether ΔU0 is greater than a during the startup process; When ΔU0>a, it is determined that the starting circuit is not disconnected and the battery participates in the power supply of the starter. Continue to judge the status of starter U1. When U1 < U2, the output instrument display unit will show the troubleshooting item: battery low. When U1≥U2, the output instrument display unit will display the following troubleshooting items: excessive parasitic load on the hydraulic main pump and / or mechanical failure of the engine body; When ΔU0≤a, it is determined that the battery is not supplying power to the starter motor. The cause of the starting abnormality is: the starter control circuit is disconnected or the starter main circuit is disconnected; the output instrument display unit displays the following troubleshooting items: The starting control circuit is disconnected, the starting main circuit is disconnected, and / or the starter motor is faulty and does not work; When 0 < n1 < n0, continue to evaluate the values ​​of U1 and U2; When U1 < U2, the output instrument display unit will show the troubleshooting item: battery low. When U1≥U2, continue to evaluate the values ​​of U1 and U3; When U1 < U3, the output instrument display unit will show the troubleshooting item: battery low. When U1 ≥ U3, the possible causes of the starting abnormality will be output to the instrument display terminal in sequence: This includes, but is not limited to: ensuring the diesel engine oil used is compatible with the environment and checking the oil quality; The starting main circuit contacts may be loose or the grounding terminal may be corroded. Inspect the starting main circuit. The engine itself has a mechanical fault; check the moving parts of the engine. The starter motor's performance has deteriorated; replace the starter motor. The hydraulic main pump is under excessive parasitic load, so disconnect the main pump. If the starting problem cannot be resolved after troubleshooting, contact the manufacturer for technical assistance. Wherein, n1 is the driving speed, n0 is the starting speed, U0 is the battery voltage when the instrument is powered on, U1 is the minimum battery voltage during the starting process, ΔU0 is the battery voltage drop and ΔU0=U0-U1, U2 is the minimum operating voltage of the instrument, and U3 is the minimum operating voltage of the ECU.

[0009] Preferably, when the towing speed is n1≥n0 and the engine is not running, the analysis and judgment specifically include: Determine if there is an abnormality in the engine oil return; if an abnormality is found, check the fuel system, fuel lines, and their components. When the condition is not abnormal, check whether white smoke appears in the exhaust tailpipe during the dragging process. If no white smoke appears, it is determined that the injector is not injecting fuel. White smoke from the exhaust tailpipe indicates a malfunction in the mechanical engine shutdown device or that the engine is in a high-altitude environment. If the engine is not in a high-altitude environment and the shutdown device is malfunctioning, the engine itself is considered to be faulty. When in a high-altitude environment and the flameout device is not damaged, it is necessary to determine whether the octane rating of the diesel fuel meets the standard. If it meets the standard, contact the manufacturer for technical assistance; if it does not meet the standard, replace it with qualified diesel fuel.

[0010] Preferably, when the engine is briefly started and then shut off after a successful start, the analysis and judgment specifically include: Determine if the engine fuel line is blocked; if a blockage is found, check the fuel line. If the fuel line is not blocked, check the intake line for blockage. If a blockage is found, inspect the intake line or contact the manufacturer for technical assistance.

[0011] An electronically readable storage medium having a computer program / instructions stored thereon, which, when executed by a processor, performs the aforementioned method for diagnosing abnormal starting of a hydraulic excavator.

[0012] An electronic device, comprising: processor; The memory stores a computer program, which is executed by the processor to perform the steps of the above-described method for diagnosing abnormal startup of a hydraulic excavator.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention identifies parameters affecting starting performance, such as engine speed, battery voltage, and emergency stop status, during the starting process. It categorizes starting abnormalities and outputs different troubleshooting solutions based on different categories. The troubleshooting process for starting abnormalities is procedural and standardized, avoiding omissions or misjudgments. It guides those skilled in the art to conduct targeted, step-by-step troubleshooting from easy to difficult, thereby quickly resolving starting abnormality problems and saving service and maintenance time and costs. Attached Figure Description

[0014] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of a method for diagnosing abnormal starting of a hydraulic excavator according to the present invention; Figure 2 This is a schematic diagram of the logic of a hydraulic excavator starting abnormality diagnosis method according to the present invention; Figure 3 The present invention provides a method for diagnosing abnormal starting of a hydraulic excavator, and the starting protection strategy is based on the following flowchart for analyzing the failure to start when the towing speed is 0 ≤ n1 < n0. Figure 4 The present invention provides a method for diagnosing abnormal starting of a hydraulic excavator, with a starting protection strategy based on a towing speed of n1≥n0, and a flowchart illustrating the analysis of the failure to start the machine. Figure 5 This invention provides a flowchart for analyzing the abnormal starting process of a hydraulic excavator after a successful start-up and brief engine stall. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figures 1-5 A method for diagnosing abnormal starting of a hydraulic excavator: when the key switch is turned on, the machine enters the start-up preparation stage, and the data is analyzed by the instrument-side data analysis unit; for example... Figure 1 As shown, the starting abnormal data acquisition and storage unit records engine speed and battery voltage signal data during the starting process after the starting state preparation stage is completed; the starting abnormal data diagnosis and analysis unit performs logical analysis and judgment on the data recorded by the starting data acquisition and storage unit; the output of the starting abnormal data diagnosis and analysis unit is output to the instrument display analysis result unit to show the cause of the starting abnormality and / or the order of analysis by the starting abnormal data diagnosis and analysis unit.

[0018] In practice: like Figure 2 As shown, when the key switch is powered on, the start-up preparation stage is determined by the data analysis unit on the instrument panel as follows: Is the current ambient temperature within the permissible ambient temperature threshold T1 (T0, T2) of the whole machine? If it is within the ambient temperature threshold, the cycle continues; otherwise, the non-compliance item is output through the instrument display unit.

[0019] After determining the ambient temperature threshold, the system checks whether the emergency stop switch has been reset when the ambient temperature reaches the threshold. If the switch is in the reset state, the system checks for fault codes that affect engine starting. Otherwise, the system outputs non-compliant items (such as electrical communication faults, engine ECU faults, related sensor faults, etc.) through the instrument display unit.

[0020] When a fault code affecting engine starting appears, the fault code is cleared to complete the start-up preparation stage and start-up is allowed; if the fault code affecting engine starting is still not cleared, the non-compliance item is output through the instrument display unit.

[0021] As further explanation: The starting data acquisition and storage unit records engine speed and battery voltage signal data during the starting process, specifically including: During the start-up preparation phase, if the vehicle fails to be found after multiple attempts or stalls after a brief start, the engine speed and battery voltage signals are recorded during the three start-up attempts. The data is then sent to the start-up abnormality data diagnostic analysis unit to determine whether the engine or the entire machine's start-up protection strategy has been triggered during the start-up process. If triggered, a reminder is sent to the instrument display unit for display. If not triggered, the start-up abnormality is determined by combining the speed signal during the start-up process.

[0022] It should be noted that the starting protection strategy for the engine or the entire machine is specifically divided into the following situations: like Figure 3As shown, when the towing speed is 0≤n1<n0, the engine does not start; when the towing speed is n1≥n0, the engine does not start; and after a successful start, the engine briefly starts and then shuts off.

[0023] The following is a further explanation of the startup protection strategy: When the engine is not running and the towing speed is 0 ≤ n1 < n0, the analysis and judgment specifically include: When 0 ≤ n1 < n0, check if n1 is 0; when n1 = 0, continue to check if ΔU0 is greater than a during the starting process (set to a fixed value, such as 2V or 5V); when ΔU0 > a, it is determined that the starting circuit is not disconnected and the battery participates in the starter power supply, and the status of U1 is checked; when U1 < U2, the output instrument display unit displays the troubleshooting item: battery low charge; when U1 ≥ U2, the output instrument display unit displays the troubleshooting item: excessive parasitic load on the hydraulic main pump and / or mechanical failure of the engine body (such as bearing seizure); when ΔU0 ≤ a, it is determined that the battery does not participate in the starter power supply, and the cause of the abnormal starting is: the starting control circuit is disconnected or the starting main circuit is disconnected; the output instrument display unit displays the troubleshooting item: If the starting control circuit is disconnected, check the key switch wiring, starter solenoid switch, starter relay and wiring harness, etc. If the starting main circuit is disconnected, check the starting main circuit harness connection status, switch contacts, ground contacts, etc., and / or the starter is faulty and not working. When 0 < n1 < n0, continue to check the values ​​of U1 and U2. When U1 < U2, the output instrument display unit will show the check item: battery low. When U1 ≥ U2, continue to check the values ​​of U1 and U3. When U1 < U3, the output instrument display unit will show the check item: battery low. Check item: Battery depletion; When U1≥U3, output the possible causes of starting abnormality to the instrument display in sequence, including but not limited to the following: The diesel engine oil used is incompatible with the environment, check the oil; Loose connection of the starting main circuit contacts or corrosion of the ground terminal, check the starting main circuit; Mechanical failure of the engine itself, check the moving parts of the engine body; Degraded starter performance, replace the starter; Excessive parasitic load on the hydraulic main pump, disconnect the main pump; If the starting abnormality problem still cannot be resolved after the check is completed, contact the manufacturer for technical assistance.

[0024] Wherein, n1 is the driving speed, n0 is the starting speed, U0 is the battery voltage when the instrument is powered on, U1 is the minimum battery voltage during the starting process, ΔU0 is the battery voltage drop and ΔU0=U0-U1, U2 is the minimum operating voltage of the instrument (set to a fixed value), and U3 is the minimum operating voltage of the ECU (set to a fixed value).

[0025] like Figure 4 As shown, when the towing speed is n1≥n0 and the engine is not running, the analysis and judgment specifically include: To determine if the engine's fuel return is abnormal, check the fuel system, fuel lines, and all components if abnormality is detected. If normal, check for white smoke from the exhaust pipe during operation. If no white smoke is detected, the injector is not injecting fuel. White smoke from the exhaust pipe indicates a malfunction of the mechanical engine shut-off device or the engine being in a high-altitude environment. If the engine is not in a high-altitude environment and the shut-off device is not damaged, the engine itself is faulty. If the engine is in a high-altitude environment and the shut-off device is not damaged, check if the diesel fuel's octane rating meets the standard. If it does, contact the manufacturer for technical assistance; if it does not, replace it with qualified diesel fuel.

[0026] like Figure 5 As shown, when the engine is briefly started and then shut off after a successful start, the analysis and judgment specifically include: To determine if the engine fuel line is blocked, check the fuel line if a blockage is found. If the fuel line is not blocked, check the intake line if a blockage is found. If a blockage is found, check the intake line or contact the manufacturer for technical assistance.

[0027] An electronically readable storage medium having a computer program / instructions stored thereon, which, when executed by a processor, performs the aforementioned method for diagnosing abnormal starting of a hydraulic excavator.

[0028] An electronic device, comprising: processor; The memory stores a computer program, which is executed by the processor to perform the steps of the above-described method for diagnosing abnormal startup of a hydraulic excavator.

[0029] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for diagnosing abnormal starting of a hydraulic excavator, characterized in that, include: When the key switch is turned on, the system enters the start-up preparation stage and is analyzed by the data analysis unit on the instrument panel. After the start-up preparation phase is completed, the start-up data acquisition and storage unit records the engine speed and battery voltage signal data during the start-up process. The startup anomaly data diagnosis and analysis unit performs logical analysis and judgment on the data recorded by the startup data acquisition and storage unit. The results output from the instrument display unit and the start-up anomaly data diagnosis and analysis unit are displayed in the instrument display and analysis results unit to show the cause of the start-up anomaly and / or to check the order of analysis by the start-up anomaly data diagnosis and analysis unit.

2. The method for diagnosing abnormal starting of a hydraulic excavator according to claim 1, characterized in that: During the startup preparation phase, the following judgments are made through the instrument-side data analysis unit: Is the current ambient temperature within the permissible ambient temperature threshold for the entire machine? Among them, if the flow continues after reaching the ambient temperature threshold, otherwise the non-compliance item will be output through the instrument display unit; After determining the ambient temperature threshold, it checks whether the emergency stop switch of the whole machine should be reset when the ambient temperature threshold is reached. Among them, when the engine is in the reset state, fault codes affecting engine starting are judged; otherwise, non-compliance items are output through the instrument display unit. When a fault code affecting engine starting appears, the fault code affecting engine starting is cleared, the start-up preparation stage is completed, and starting is allowed. If the fault code affecting engine starting is not cleared, the non-compliance item will be output through the instrument display unit.

3. The method for diagnosing abnormal starting of a hydraulic excavator according to claim 1 or 2, characterized in that: The starting data acquisition and storage unit records engine speed and battery voltage signal data during the starting process, specifically including: During the start-up preparation phase, if the vehicle is not found after multiple attempts or is briefly started and then shut off, record the engine speed and battery voltage signal during the three start-up attempts. Data is sent to the start-up anomaly data diagnostic analysis unit to determine whether the start-up protection strategy of the engine or the whole machine has been triggered during the start-up process; When triggered, a notification is sent to the instrument display unit for display. If no trigger is found, the abnormal starting situation is determined by combining the speed signal during the starting process.

4. The method for diagnosing abnormal starting of a hydraulic excavator according to claim 3, characterized in that: The starting protection strategies for engines or the entire machine are specifically divided into the following situations: If the towing speed is 0 ≤ n1 < n0, the engine will not start. If the towing speed is n1≥n0, the engine will not start; After a successful start, briefly start the engine and then turn it off.

5. The method for diagnosing abnormal starting of a hydraulic excavator according to claim 4, characterized in that: When the engine is not running and the towing speed is 0 ≤ n1 < n0, the analysis and judgment specifically include: When 0 ≤ n1 < n0, determine whether n1 is 0; When n1=0, continue to determine whether ΔU0 is greater than a during the startup process; When ΔU0>a, it is determined that the starting circuit is not disconnected and the battery participates in the power supply of the starter. Continue to judge the status of starter U1. When U1 < U2, the output instrument display unit will show the troubleshooting item: battery low. When U1≥U2, the output instrument display unit will display the following troubleshooting items: excessive parasitic load on the hydraulic main pump and / or mechanical failure of the engine body; When ΔU0≤a, it is determined that the battery is not supplying power to the starter motor. The cause of the starting abnormality is: the starter control circuit is disconnected or the starter main circuit is disconnected; the output instrument display unit displays the following troubleshooting items: The starting control circuit is disconnected, the starting main circuit is disconnected, and / or the starter motor is faulty and does not work; When 0 < n1 < n0, continue to evaluate the values ​​of U1 and U2; When U1 < U2, the output instrument display unit will show the troubleshooting item: battery low. When U1≥U2, continue to evaluate the values ​​of U1 and U3; When U1 < U3, the output instrument display unit will show the troubleshooting item: battery low. When U1≥U3, the possible causes of the starting abnormality will be output to the instrument display terminal in sequence; Wherein, n1 is the driving speed, n0 is the starting speed, U0 is the battery voltage when the instrument is powered on, U1 is the minimum battery voltage during the starting process, ΔU0 is the battery voltage drop and ΔU0=U0-U1, U2 is the minimum operating voltage of the instrument, and U3 is the minimum operating voltage of the ECU.

6. The method for diagnosing abnormal starting of a hydraulic excavator according to claim 4, characterized in that: When the engine is not running at a towing speed of n1 ≥ n0, the analysis and judgment specifically include: Determine if there is an abnormality in the engine oil return; if an abnormality is found, check the fuel system, fuel lines, and their components. When the condition is not abnormal, check whether white smoke appears in the exhaust tailpipe during the dragging process. If no white smoke appears, it is determined that the injector is not injecting fuel. White smoke from the exhaust tailpipe indicates a malfunction in the mechanical engine shutdown device or that the engine is in a high-altitude environment. If the engine is not in a high-altitude environment and the shutdown device is malfunctioning, the engine itself is considered to be faulty. When in a high-altitude environment and the flameout device is not damaged, it is necessary to determine whether the octane rating of the diesel fuel meets the standard. If it meets the standard, contact the manufacturer for technical assistance; if it does not meet the standard, replace it with qualified diesel fuel.

7. The method for diagnosing abnormal starting of a hydraulic excavator according to claim 4, characterized in that: When the engine is briefly started and then shut off after a successful start, the analysis and judgment specifically include: Determine if the engine fuel line is blocked; if a blockage is found, check the fuel line. If the fuel line is not blocked, check the intake line for blockage. If a blockage is found, inspect the intake line or contact the manufacturer for technical assistance.

8. An electronically readable storage medium having a computer program / instructions stored thereon, characterized in that, The computer program / instructions are executed by the processor to perform the hydraulic excavator starting abnormality diagnosis method according to any one of claims 1-7.

9. An electronic device, characterized in that, Electronic devices include: processor; A memory having a computer program stored thereon, wherein the computer program is executed by a processor to perform the steps of the hydraulic excavator starting abnormality diagnosis method according to any one of claims 1-7.

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