Hydraulic pump control method and device

Abstract

The invention discloses a hydraulic pump control method and device. The method comprises the steps that a smoke limit power message reported by an engine in real time is obtained; correcting the smoke limit power by using a pre-calibrated correction coefficient to obtain corrected smoke limit power; based on the corrected smoke limit power and the current rotating speed, corresponding main pump power is determined; and triggering a hydraulic pump of the excavator to work according to the power of the main pump. According to the method, the corresponding main pump power is determined on the basis of the smoke limit power of the engine, real-time optimal performance output of the engine of the excavator is ensured, reduction of the rotating speed of the engine is avoided, and the responsiveness and operation efficiency of the excavator are improved.

Description

Technical Field

[0001] The present application relates to the field of excavators, and in particular to a hydraulic pump control method and device. Background Art

[0002] Traditional excavators use a pilot handle to control the mechanism action and hydraulic pump displacement. When the handle is pulled quickly, the hydraulic pump output pressure is high and the displacement changes rapidly, resulting in a rapid increase in the engine loading torque. The engine will have a large speed adjustment phenomenon, which seriously affects the power and driving experience of the vehicle. At present, load softening is generally achieved by adding a ramp (a pre-calibrated loading slope) to the hydraulic pump displacement control current. However, the use of a ramp to limit the hydraulic power has poor adaptability and cannot take into account the initial conditions of different intake pressures. The hydraulic power limitation is too severe, the excavator moves slowly and has no power to dig. The power is released too much, the engine speed drops greatly, and the speed recovery time is long, resulting in reduced excavator operating efficiency. Summary of the invention

[0003] The present application provides a hydraulic pump control method and device, the purpose of which is to achieve the best performance output of the engine in real time to improve the responsiveness and working efficiency of the excavator.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A hydraulic pump control method, comprising:

[0006] Obtaining a smoke-limited power message reported by the engine in real time; the smoke-limited power message includes the smoke-limited power and current speed of the engine; the smoke-limited power is determined based on the ratio between the current intake air volume and the theoretical air-fuel ratio;

[0007] Using a pre-calibrated correction coefficient, the smoke limit power is corrected to obtain a corrected smoke limit power;

[0008] Determining a corresponding main pump power based on the modified smoke limit power and the current speed;

[0009] According to the main pump power, the hydraulic pump of the excavator is triggered to work.

[0010] Optionally, determining the corresponding main pump power based on the modified smoke limit power and the current speed includes:

[0011] Based on the modified smoke limit power, determining a corresponding target fuel quantity; the target fuel quantity represents the fuel quantity available for combustion of the engine;

[0012] Determining the engine torque corresponding to the target oil volume and the current speed based on the universal characteristic table of the engine; the universal characteristic table includes a plurality of sample engine torques, and corresponding sample oil volumes and sample speeds;

[0013] Based on the engine torque, a corresponding main pump power is determined.

[0014] Optionally, based on the engine torque, determining the corresponding main pump power includes:

[0015] determining a maximum output power of the engine based on the engine torque;

[0016] Obtaining a gear setting power of the hydraulic pump; the gear setting power is based on a manual input by a user of the excavator;

[0017] The main pump power is determined based on the minimum value between the gear setting power and the maximum output power.

[0018] Optionally, the hydraulic pump of the excavator includes a first hydraulic pump and a second hydraulic pump, and triggering the hydraulic pump of the excavator to work according to the power of the main pump includes:

[0019] Obtaining hydraulic working parameters of the excavator; the hydraulic working parameters include a gear setting speed, a required flow and pressure of the first hydraulic pump, and a required flow and pressure of the second hydraulic pump; the gear setting speed is based on manual input by a user of the excavator;

[0020] Based on the main pump power and hydraulic operating condition parameters, a first power limiting flow rate and a second power limiting flow rate are calculated;

[0021] The first hydraulic pump is triggered to operate according to the first power limiting flow rate, and the second hydraulic pump is triggered to operate according to the second power limiting flow rate.

[0022] A hydraulic pump control device, comprising:

[0023] A message monitoring unit, used to obtain a smoke-limited power message reported by the engine in real time; the smoke-limited power message includes the smoke-limited power and current speed of the engine; the smoke-limited power is determined based on the ratio between the current intake air volume and the theoretical air-fuel ratio;

[0024] A power correction unit, used to correct the smoke limit power using a pre-calibrated correction coefficient to obtain a corrected smoke limit power;

[0025] A power determination unit, configured to determine a corresponding main pump power based on the modified smoke limit power and the current rotation speed;

[0026] The triggering working unit is used to trigger the hydraulic pump of the excavator to work according to the power of the main pump.

[0027] Optionally, the power determination unit is specifically used to:

[0028] Based on the modified smoke limit power, determining a corresponding target fuel quantity; the target fuel quantity represents the fuel quantity available for combustion of the engine;

[0029] Determining the engine torque corresponding to the target oil volume and the current speed based on the universal characteristic table of the engine; the universal characteristic table includes a plurality of sample engine torques, and corresponding sample oil volumes and sample speeds;

[0030] Based on the engine torque, a corresponding main pump power is determined.

[0031] Optionally, the power determination unit is specifically used to:

[0032] determining a maximum output power of the engine based on the engine torque;

[0033] Obtaining a gear setting power of the hydraulic pump; the gear setting power is based on a manual input by a user of the excavator;

[0034] The main pump power is determined based on the minimum value between the gear setting power and the maximum output power.

[0035] Optionally, the hydraulic pump of the excavator includes a first hydraulic pump and a second hydraulic pump, and the triggering working unit is specifically used for:

[0036] Obtaining hydraulic working parameters of the excavator; the hydraulic working parameters include a gear setting speed, a required flow and pressure of the first hydraulic pump, and a required flow and pressure of the second hydraulic pump; the gear setting speed is based on manual input by a user of the excavator;

[0037] Based on the main pump power and hydraulic operating condition parameters, a first power limiting flow rate and a second power limiting flow rate are calculated;

[0038] The first hydraulic pump is triggered to operate according to the first power limiting flow rate, and the second hydraulic pump is triggered to operate according to the second power limiting flow rate.

[0039] A storage medium includes a stored program, wherein the program executes the hydraulic pump control method when executed by a processor.

[0040] An excavator, comprising: a processor, a memory and a bus; the processor and the memory are connected via the bus;

[0041] The memory is used to store a program, and the processor is used to run the program, wherein the hydraulic pump control method is executed when the program is run by the processor.

[0042] The technical solution provided by the present application obtains the smoke limit power message reported by the engine in real time. The smoke limit power is corrected using a pre-calibrated correction coefficient to obtain the corrected smoke limit power. Based on the corrected smoke limit power and the current speed, the corresponding main pump power is determined. Based on the main pump power, the hydraulic pump of the excavator is triggered to work. The present application determines the corresponding main pump power based on the smoke limit power of the engine to ensure the best performance output of the excavator's engine in real time, avoid a drop in engine speed, and thus improve the excavator's responsiveness and operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 A flow chart of a hydraulic pump control method provided in an embodiment of the present application;

[0045] Figure 2 A flow chart of another hydraulic pump control method provided in an embodiment of the present application;

[0046] Figure 3 A flow chart of another hydraulic pump control method provided in an embodiment of the present application;

[0047] Figure 4 A flow chart of another hydraulic pump control method provided in an embodiment of the present application;

[0048] Figure 5 A schematic diagram of the structure of a hydraulic pump control device provided in an embodiment of the present application;

[0049] Figure 6 A hydraulic pump control logic schematic diagram provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] In this application, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprise one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0052] like Figure 1 As shown, it is a flow chart of a hydraulic pump control method provided in an embodiment of the present application, which includes the following steps.

[0053] S101: Obtaining the smoke power limit message reported by the engine in real time.

[0054] The smoke-limited power message includes the smoke-limited power of the engine and the current speed, and the smoke-limited power is determined based on the ratio between the current intake volume and the theoretical air-fuel ratio.

[0055] In some examples, a custom message may be added in advance to the control logic of the engine controller so that the engine reports the smoke limit power message to the hydraulic pump controller in real time.

[0056] The so-called smoke-limited power can be understood as: since the engine's intake volume does not reach the maximum during the transient loading process, the engine's torque is affected, resulting in the engine being unable to output the external characteristic power corresponding to each speed. There will be attenuation. As for the extent of the attenuation, it can be reflected by the amount of oil limited by smoke. The amount of oil limited by smoke can be regarded as smoke-limited power. Smoke-limited power = current intake volume / theoretical air-fuel ratio.

[0057] The so-called theoretical air-fuel ratio refers to the ratio of the minimum amount of air to the amount of fuel required for the engine to completely burn the fuel.

[0058] S102: Correcting the smoke limit power using a pre-calibrated correction coefficient to obtain a corrected smoke limit power.

[0059] The smoke limit power is corrected using a pre-calibrated correction coefficient, and the obtained corrected smoke limit power can be understood as corrected smoke limit power = smoke limit power × correction coefficient.

[0060] It should be noted that using a pre-calibrated correction coefficient to correct the smoke limit power can effectively prevent the smoke limit power from exceeding the normal range. Generally speaking, due to the working environment of the excavator and the measurement accuracy of the air intake measurement equipment, there is a certain deviation in the smoke limit power. Using a pre-calibrated correction coefficient to correct the smoke limit power to obtain the corrected smoke limit power can eliminate the deviation in the smoke limit power.

[0061] S103: Determine the corresponding main pump power based on the corrected smoke limit power and the current rotation speed.

[0062] Among them, after obtaining the corrected smoke limit power, combined with the current speed, the main pump power can be calculated, and the main pump power is a working parameter of the hydraulic pump controller to control the hydraulic pump to work.

[0063] Optionally, based on the modified smoke limit power and the current speed, the corresponding main pump power can be determined. Figure 2 The steps are shown and the corresponding explanations.

[0064] S104: triggering the hydraulic pump of the excavator to work according to the power of the main pump.

[0065] Among them, because the target oil volume corresponding to the smoke power limit is calculated by the actual intake volume (i.e. the current intake volume) and the theoretical air-fuel ratio at the current speed, the oil volume available for engine combustion can be accurately obtained. The target oil volume can be obtained by checking the engine's universal characteristic table to obtain the corresponding engine torque. The main pump power control based on the theoretical torque (i.e. the engine torque) at the current intake volume can effectively improve the accuracy of the main pump power.

[0066] Optionally, the realization process of triggering the hydraulic pump of the excavator to work according to the power of the main pump can be seen in Figure 4 The steps are shown and the corresponding explanations.

[0067] Combination Figure 2-Figure 4The method shown, the fundamental idea of ​​the embodiment of the present application can be understood as: according to the current air intake in the transient process, the hydraulic pump is controlled to load the main pump power, and the transient torque response capacity of the engine (i.e., the maximum output power of the engine) must not be exceeded. Since the control of the hydraulic pump requires a power value as a control input signal (the hydraulic pump cannot be controlled according to the air volume model), the air volume and the maximum output power capacity of the engine need to correspond. For this purpose, the theoretical target oil volume is calculated according to the current air intake of the engine, and then the engine torque that the engine can exert at the current speed and target oil volume is found according to the engine universal characteristic table, and then the maximum output power of the engine is calculated and sent to the hydraulic pump controller for control. The hydraulic pump controller will compare the received maximum output power of the engine with the gear setting power of the hydraulic pump, and load the main pump power according to the minimum value of the two, so as to ensure that the engine speed will not be suppressed and the excavator can operate normally.

[0068] The process shown in S101-S104 above determines the corresponding main pump power based on the smoke limit power of the engine, ensuring that the excavator's engine can output the best performance in real time and avoiding the engine speed from dropping, thereby improving the excavator's responsiveness and operating efficiency.

[0069] like Figure 2 As shown, it is a flow chart of another hydraulic pump control method provided in an embodiment of the present application, including the following steps.

[0070] S201: Determine a corresponding target fuel quantity based on the corrected smoke limit power.

[0071] The target oil quantity represents the oil quantity available for combustion of the engine.

[0072] In some examples, the target oil volume corresponding to the corrected smoke limit power may be obtained by querying a preset relationship table, where the preset relationship table includes a plurality of sample oil volumes and corresponding sample smoke limit powers.

[0073] In some examples, the corrected smoke limit power may be substituted into a preset fuel quantity calculation formula to calculate the corresponding target fuel quantity.

[0074] S202: Determine the engine torque corresponding to the target fuel quantity and the current speed based on the universal characteristic table of the engine.

[0075] The universal characteristic table includes a plurality of sample engine torques, and corresponding sample oil volumes and sample speeds.

[0076] In some examples, the universal characteristic tables of engines of different models are different, and the corresponding universal characteristic table can be searched according to the model of the engine.

[0077] It should be emphasized that the engine torque corresponding to the target fuel volume and current speed can be understood as the optimal torque that the engine can exert based on the current intake volume under transient loading.

[0078] S203: Determine the corresponding main pump power based on the engine torque.

[0079] After obtaining the engine torque corresponding to the target oil volume and the current rotation speed, the corresponding main pump power can be calculated using the engine torque.

[0080] It should be noted that the main pump power (which can be understood as the hydraulic power of the excavator's hydraulic pump) can be regarded as the load of the engine. If the load torque undertaken by the engine is greater than the current output torque capacity of the engine, the engine speed will decrease. The decrease in engine speed will lead to a decrease in the pumping capacity, which in turn will lead to a further decrease in the engine's output torque (the engine's work capacity is affected by two aspects: oil and gas). For this reason, determining the corresponding main pump power based on the engine torque (i.e., the best torque that the engine can exert based on the current intake volume under transient loading) can effectively avoid a series of problems such as poor pumping capacity caused by the decrease in engine speed.

[0081] Optionally, based on the engine torque, the corresponding main pump power can be determined by referring to Figure 3 The steps are shown and the corresponding explanations.

[0082] The process shown in S201-S203 above can use the universal characteristic table of the engine to determine the engine torque corresponding to the target fuel volume and the current speed, so as to determine the corresponding main pump power based on the optimal torque that can be exerted by the current intake volume during the transient loading process of the engine, thereby avoiding a drop in the engine speed.

[0083] like Figure 3 As shown, it is a flow chart of another hydraulic pump control method provided in an embodiment of the present application, including the following steps.

[0084] S301: Determine the maximum output power of the engine based on the engine torque.

[0085] There is a corresponding conversion relationship between the engine torque and the maximum output power of the engine, and the maximum output power of the engine can be calculated through the conversion relationship.

[0086] In some examples, the maximum output power corresponding to the engine torque may also be obtained by querying a preset relationship table.

[0087] S302: Obtaining the gear setting power of the hydraulic pump.

[0088] The gear setting power is based on manual input by the user of the excavator.

[0089] It is understandable that when the excavator is working, the hydraulic pump provides power for the excavation mechanism, and the user will adjust the gear setting power of the hydraulic pump in real time to obtain the excavation power required by the user.

[0090] S303: Determine the main pump power based on the minimum value between the gear setting power and the maximum output power.

[0091] The gear setting power is compared with the maximum output power to obtain the minimum value between the gear setting power and the maximum output power, which is determined as the main pump power.

[0092] In a possible implementation, if the gear setting power is less than the maximum output power, the gear setting power is determined as the main pump power; if the gear setting power is greater than or equal to the maximum output power, the maximum output power is determined as the main pump power.

[0093] The process shown in S301-S303 above determines the main pump power based on the minimum value of the gear setting power and the maximum output power of the engine. This not only enables the engine to exert its maximum output power in real time to improve the responsiveness and operating efficiency of the excavator, but also ensures that the main pump power of the excavator will not exceed the power limit specified by the user.

[0094] like Figure 4 As shown, it is a flow chart of another hydraulic pump control method provided in an embodiment of the present application, including the following steps.

[0095] S401: Obtain hydraulic working parameters of the excavator.

[0096] The hydraulic operating parameters include a gear setting speed, a required flow and pressure of a first hydraulic pump, and a required flow and pressure of a second hydraulic pump. The gear setting speed is based on manual input by a user of the excavator.

[0097] S402: Based on the main pump power and the hydraulic operating parameters, a first power limiting flow rate and a second power limiting flow rate are calculated.

[0098] Among them, the hydraulic pump controller of the excavator has a corresponding control logic, and the control logic can calculate the first power limiting flow and the second power limiting flow based on the main pump power and hydraulic operating parameters.

[0099] In some examples, combined with the process of determining the main pump power based on the smoke limit power, the hydraulic pump controller outputs the control logic of the first power limit flow and the second power limit flow according to the main pump power and the hydraulic working condition parameters, which can be summarized as follows: Figure 6 shown.

[0100] S403: Triggering the first hydraulic pump to operate according to the first power limited flow rate, and triggering the second hydraulic pump to operate according to the second power limited flow rate.

[0101] Among them, the first hydraulic pump is triggered to work according to the first power limiting flow, and the second hydraulic pump is triggered to work according to the second power limiting flow, so that the hydraulic power is fully loaded according to the maximum capacity of the engine, ensuring that the movement speed and speed drop are always in the optimal state, and the engine can achieve real-time maximum output power to improve the responsiveness and working efficiency of the excavator.

[0102] The process shown in S401-S403 above can trigger the first hydraulic pump to work according to the first power limit flow and the second hydraulic pump to work according to the second power limit flow through the main pump power and hydraulic operating parameters, thereby completing the normal operation of the excavator.

[0103] like Figure 5 As shown, it is a schematic diagram of the architecture of a hydraulic pump control device provided in an embodiment of the present application, including the units shown below.

[0104] The message monitoring unit 100 is used to obtain the smoke limit power message reported by the engine in real time; the smoke limit power message includes the smoke limit power and current speed of the engine; the smoke limit power is determined based on the ratio between the current intake air volume and the theoretical air-fuel ratio.

[0105] The power correction unit 200 is used to correct the smoke limit power using a pre-calibrated correction coefficient to obtain a corrected smoke limit power.

[0106] The power determination unit 300 is used to determine the corresponding main pump power based on the modified smoke limit power and the current rotation speed.

[0107] Optionally, the power determination unit 300 is specifically used to: determine the corresponding target fuel quantity based on the corrected smoke limit power; the target fuel quantity represents the amount of fuel available for engine combustion; based on the engine's universal characteristic table, determine the engine torque corresponding to the target fuel quantity and the current speed; the universal characteristic table includes multiple sample engine torques, and corresponding sample fuel quantities and sample speeds; based on the engine torque, determine the corresponding main pump power.

[0108] Optionally, the power determination unit 300 is specifically used to: determine the maximum output power of the engine based on the engine torque; obtain the gear setting power of the hydraulic pump; the gear setting power is based on manual input by the user of the excavator; and determine the main pump power based on the minimum value between the gear setting power and the maximum output power.

[0109] The triggering working unit 400 is used to trigger the hydraulic pump of the excavator to work according to the power of the main pump.

[0110] Optionally, the hydraulic pump of the excavator includes a first hydraulic pump and a second hydraulic pump, and the triggering working unit 400 is specifically used to: obtain the hydraulic operating parameters of the excavator; the hydraulic operating parameters include the gear setting speed, the required flow and pressure of the first hydraulic pump, and the required flow and pressure of the second hydraulic pump; the gear setting speed is based on the manual input of the user of the excavator; based on the main pump power and the hydraulic operating parameters, the first power limiting flow and the second power limiting flow are calculated; the first hydraulic pump is triggered to work according to the first power limiting flow, and the second hydraulic pump is triggered to work according to the second power limiting flow.

[0111] Each of the above-mentioned units determines the corresponding main pump power based on the smoke limit power of the engine, ensuring that the excavator's engine can output the best performance in real time and avoid engine speed drop, thereby improving the excavator's responsiveness and operating efficiency.

[0112] The present application also provides a computer-readable storage medium, which includes a stored program, wherein the program executes the hydraulic pump control method provided by the present application.

[0113] The present application also provides an excavator, including: a processor, a memory and a bus. The processor and the memory are connected via the bus, the memory is used to store programs, and the processor is used to run the programs, wherein the hydraulic pump control method provided by the present application is executed when the programs are run.

[0114] In addition, the functions described above in the embodiments of the present application may be at least partially performed by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0115] Although several specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present application. Certain features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination.

[0116] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other to form a technical solution.

Claims

1. A hydraulic pump control method, characterized in that: include: Obtain the smoke-limited power message reported by the engine in real time; The smoke limit power message includes the smoke limit power and current speed of the engine; The smoke-limited power is determined based on the ratio between the current intake air volume and the theoretical air-fuel ratio; Using a pre-calibrated correction coefficient, the smoke limit power is corrected to obtain a corrected smoke limit power; Determining a corresponding main pump power based on the modified smoke limit power and the current speed; According to the main pump power, the hydraulic pump of the excavator is triggered to work.

2. The method according to claim 1, characterized in that: Based on the modified smoke limit power and the current speed, determining the corresponding main pump power includes: Based on the modified smoke limit power, determining a corresponding target fuel quantity; the target fuel quantity represents the fuel quantity available for combustion of the engine; Determining the engine torque corresponding to the target oil volume and the current speed based on the universal characteristic table of the engine; the universal characteristic table includes a plurality of sample engine torques, and corresponding sample oil volumes and sample speeds; Based on the engine torque, a corresponding main pump power is determined.

3. The method according to claim 2, characterized in that Based on the engine torque, determining a corresponding main pump power includes: determining a maximum output power of the engine based on the engine torque; Obtaining a gear setting power of the hydraulic pump; the gear setting power is based on a manual input by a user of the excavator; The main pump power is determined based on the minimum value between the gear setting power and the maximum output power.

4. The method according to claim 1, characterized in that: The hydraulic pump of the excavator includes a first hydraulic pump and a second hydraulic pump. According to the power of the main pump, the hydraulic pump of the excavator is triggered to work, including: Obtaining hydraulic working parameters of the excavator; the hydraulic working parameters include a gear setting speed, a required flow and pressure of the first hydraulic pump, and a required flow and pressure of the second hydraulic pump; the gear setting speed is based on manual input by a user of the excavator; Based on the main pump power and hydraulic operating condition parameters, a first power limiting flow rate and a second power limiting flow rate are calculated; The first hydraulic pump is triggered to operate according to the first power limiting flow rate, and the second hydraulic pump is triggered to operate according to the second power limiting flow rate.

5. A hydraulic pump control device, characterized in that: include: Message monitoring unit, used to obtain the smoke limit power message reported by the engine in real time; The smoke limit power message includes the smoke limit power and current speed of the engine; The smoke-limited power is determined based on the ratio between the current intake air volume and the theoretical air-fuel ratio; A power correction unit, used to correct the smoke limit power using a pre-calibrated correction coefficient to obtain a corrected smoke limit power; A power determination unit, configured to determine a corresponding main pump power based on the modified smoke limit power and the current rotation speed; The triggering working unit is used to trigger the hydraulic pump of the excavator to work according to the power of the main pump.

6. The device according to claim 5, characterized in that The power determination unit is specifically used for: Based on the modified smoke limit power, determining a corresponding target fuel quantity; the target fuel quantity represents the fuel quantity available for combustion of the engine; Determining the engine torque corresponding to the target oil volume and the current speed based on the universal characteristic table of the engine; the universal characteristic table includes a plurality of sample engine torques, and corresponding sample oil volumes and sample speeds; Based on the engine torque, a corresponding main pump power is determined.

7. The device according to claim 6, characterized in that The power determination unit is specifically used for: determining a maximum output power of the engine based on the engine torque; Obtaining a gear setting power of the hydraulic pump; the gear setting power is based on a manual input by a user of the excavator; The main pump power is determined based on the minimum value between the gear setting power and the maximum output power.

8. The device according to claim 5, characterized in that The hydraulic pump of the excavator includes a first hydraulic pump and a second hydraulic pump, and the triggering working unit is specifically used for: Obtaining hydraulic working parameters of the excavator; the hydraulic working parameters include a gear setting speed, a required flow and pressure of the first hydraulic pump, and a required flow and pressure of the second hydraulic pump; the gear setting speed is based on manual input by a user of the excavator; Based on the main pump power and hydraulic operating condition parameters, a first power limiting flow rate and a second power limiting flow rate are calculated; The first hydraulic pump is triggered to operate according to the first power limiting flow rate, and the second hydraulic pump is triggered to operate according to the second power limiting flow rate.

9. A storage medium, characterized in that: The storage medium includes a stored program, wherein the program, when executed by a processor, executes the hydraulic pump control method according to any one of claims 1 to 4.

10. An excavator, characterized in that: include: processor, memory, and bus; The processor is connected to the memory via the bus; The memory is used to store programs, and the processor is used to run programs, wherein the program executes the hydraulic pump control method according to any one of claims 1 to 4 when the program is run by the processor.

Images