Hydraulic pump control method and device

Abstract

The application discloses a hydraulic pump control method and device, and the method comprises the following steps: obtaining a smoke limit power message reported by an engine in real time; correcting the smoke limit power by using a pre-labeled correction coefficient to obtain a corrected smoke limit power; determining a corresponding main pump power based on the corrected smoke limit power and a current rotating speed; and triggering the hydraulic pump of the excavator to work according to the main pump power. The method determines the corresponding main pump power based on the smoke limit power of the engine, ensures that the excavator engine can output the best performance in real time, avoids the decrease of the engine rotating speed, and improves the response and work efficiency of the excavator.

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

[0002] The traditional excavator is controlled by a pilot handle control mechanism and a hydraulic pump displacement. When the handle is quickly pulled, the hydraulic pump output pressure is high, and the displacement changes rapidly, which leads to a rapid increase in engine loading torque, and the engine has a large speed adjustment phenomenon, which seriously affects the vehicle power and driving experience. At present, the load is softened by adding a ramp (a pre-calibrated loading slope) to limit the hydraulic pump displacement control current, but using the ramp to limit the hydraulic power has poor adaptability and cannot take into account different initial conditions of intake pressure. The hydraulic power is too severely limited, the excavator is slow and weak, and the power is too large, the engine speed drops, the speed recovery time is long, and the working efficiency of the excavator is reduced. SUMMARY

[0003] The present application provides a hydraulic pump control method and device, aiming to realize real-time optimal performance output of the engine to improve the responsiveness and working efficiency of the excavator.

[0004] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0005] A hydraulic pump control method, comprising:

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

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

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

[0009] Triggering the hydraulic pump of the excavator to work according to the main pump power.

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

[0011] Determining the corresponding target oil quantity based on the corrected smoke limit power; the target oil quantity represents the oil quantity available for combustion of the engine;

[0012] determining an engine torque corresponding to the target oil amount and the current rotating speed based on a universal characteristic table of the engine; the universal characteristic table comprising a plurality of sample engine torques, and corresponding sample oil amounts and sample rotating speeds;

[0013] determining a corresponding main pump power based on the engine torque.

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

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

[0016] obtaining a gear setting power of a hydraulic pump; the gear setting power being based on a manual input of a user of the excavator;

[0017] determining the main pump power based on a minimum value between the gear setting power and the maximum output power.

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

[0019] obtaining hydraulic working condition parameters of the excavator; the hydraulic working condition parameters comprising a gear setting rotating speed, a required flow rate and pressure of the first hydraulic pump, and a required flow rate and pressure of the second hydraulic pump; the gear setting rotating speed being based on a manual input of a user of the excavator;

[0020] calculating a first power limited flow rate and a second power limited flow rate based on the main pump power and the hydraulic working condition parameters;

[0021] triggering the first hydraulic pump to work according to the first power limited flow rate, and triggering the second hydraulic pump to work according to the second power limited flow rate.

[0022] A hydraulic pump control device comprises:

[0023] a message monitoring unit configured to obtain a smoke limit power message reported by an engine in real time; the smoke limit power message comprising a smoke limit power of the engine and a current rotating speed; the smoke limit power being determined based on a ratio between a current intake amount and a theoretical air-fuel ratio;

[0024] a power correction unit configured to correct the smoke limit power by using a correction coefficient calibrated in advance, to obtain a corrected smoke limit power;

[0025] a power determination unit configured to determine a corresponding main pump power based on the corrected smoke limit power and the current rotating speed;

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

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

[0028] determine a target oil amount corresponding to the engine torque based on the corrected smoke limit power; the target oil amount represents an oil amount available for combustion of the engine;

[0029] determine an engine torque corresponding to the target oil amount and the current rotating speed based on a universal characteristic table of the engine; the universal characteristic table includes a plurality of sample engine torques, and corresponding sample oil amounts and sample rotating speeds;

[0030] determine the main pump power based on the engine torque.

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

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

[0033] obtain a gear setting power of the hydraulic pump; the gear setting power is manually input by a user of the excavator;

[0034] determine the main pump power based on a 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 unit is specifically configured to:

[0036] obtain hydraulic working condition parameters of the excavator; the hydraulic working condition parameters include a gear setting rotating speed, required flow and pressure of the first hydraulic pump, and required flow and pressure of the second hydraulic pump; the gear setting rotating speed is manually input by a user of the excavator;

[0037] calculate a first power limiting flow and a second power limiting flow based on the main pump power and the hydraulic working condition parameters;

[0038] trigger the first hydraulic pump to work according to the first power limiting flow, and trigger the second hydraulic pump to work according to the second power limiting flow.

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

[0040] An excavator includes a processor, a memory and a bus; the processor is connected with the memory through the bus;

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

[0042] The technical scheme provided in the application obtains the smoke limit power message reported by the engine in real time. The smoke limit power is corrected by using the correction coefficient calibrated in advance to obtain the corrected smoke limit power. The corresponding main pump power is determined based on the corrected smoke limit power and the current rotating speed. The hydraulic pump of the excavator is triggered to work according to the main pump power. The application determines the corresponding main pump power based on the smoke limit power of the engine, ensures that the excavator engine can output the best performance in real time, avoids the engine rotating speed from being reduced, and thus improves the responsiveness and operation efficiency of the excavator. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0044] Figure 1 A flowchart of a hydraulic pump control method provided by an embodiment of the present application is shown in the figure.

[0045] Figure 2 A flowchart of another hydraulic pump control method provided by an embodiment of the present application is shown in the figure.

[0046] Figure 3 A flowchart of another hydraulic pump control method provided by an embodiment of the present application is shown in the figure.

[0047] Figure 4 A flowchart of another hydraulic pump control method provided by an embodiment of the present application is shown in the figure.

[0048] Figure 5 An architecture diagram of a hydraulic pump control device provided by an embodiment of the present application is shown in the figure.

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

[0050] The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0051] In this application, the terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply there is any such actual relationship or order between these entities or operations. The terms "include", "contain" 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 not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0052] As shown in the flowchart of a hydraulic pump control method provided by an embodiment of the application, the method comprises the following steps. Figure 1

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

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

[0055] In some examples, a custom message can be added in advance in 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 limit power can be understood as follows: Since the intake air amount of the engine does not reach the maximum during the transient loading process, the torque of the engine is affected, and the engine cannot output the external characteristic power corresponding to each speed at this time, which will be attenuated. As to the degree of attenuation, it can be reflected by the smoke limit oil amount, which can be regarded as the smoke limit power. The smoke limit power = current intake air amount / theoretical air-fuel ratio.

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

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

[0059] The corrected smoke limit power obtained by correcting the smoke limit power by using the pre-calibrated correction coefficient can be understood as corrected smoke limit power = smoke limit power x correction coefficient.

[0060] ​It should be noted that the smoke limit power is corrected by using the pre-calibrated correction coefficient, which can effectively avoid the smoke limit power exceeding the conventional range. Generally, due to the working environment of the excavator, the measurement accuracy of the intake air measurement device, and the deviation of the smoke limit power, the pre-calibrated correction coefficient is used to correct the smoke limit power to obtain the corrected smoke limit power, which can eliminate the deviation of the smoke limit power.

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

[0062] Wherein, after obtaining the corrected smoke limit power, the main pump power can be calculated in combination with the current speed, and the main pump power is a working parameter of the hydraulic pump controller for controlling the hydraulic pump to work.

[0063] Optionally, the implementation process of determining the corresponding main pump power based on the corrected smoke limit power and the current speed can be referred to the steps shown in Figure 2 and the corresponding explanation.

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

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

[0066] Optionally, the implementation process of triggering the hydraulic pump of the excavator to work according to the main pump power can be referred to the steps shown in Figure 4 and the corresponding explanation.

[0067] In combination with Figures 2-4The basic idea of the method and the embodiment of the application can be understood as follows: the hydraulic pump is controlled according to the current intake amount in the transient process to load the main pump power, without exceeding the engine transient torque response capability (i.e. the maximum output power of the engine). Since the hydraulic pump needs a power value as a control input signal (the hydraulic pump cannot be controlled according to the air amount type), the air amount and the maximum output power capability of the engine need to be matched. Therefore, the theoretical target oil amount is calculated according to the current intake amount of the engine, and then the engine torque that can be exerted by the engine under the current speed and the target oil amount is found according to the engine universal characteristic table, and the maximum output power of the engine is calculated and output to the hydraulic pump controller for control. The hydraulic pump controller compares the received maximum output power of the engine with the gear setting power of the hydraulic pump, and loads the main pump power according to the minimum value, so as to ensure that the engine speed will not be pressed down and the excavator can operate normally.

[0068] The above-mentioned flow S101-S104 determines the corresponding main pump power based on the smoke limit power of the engine, ensures the best performance output of the engine of the excavator in real time, avoids the engine speed from being reduced, and thus improves the responsiveness and operation efficiency of the excavator.

[0069] As Figure 2 Fig. 4 is a flow diagram of another hydraulic pump control method provided by the embodiment of the application, which includes the following steps.

[0070] S201: determining the corresponding target oil amount based on the corrected smoke limit power.

[0071] The target oil amount represents the oil amount available for the engine to burn.

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

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

[0074] S202: determining the engine torque corresponding to the target oil amount 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 amounts and sample speeds.

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

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

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

[0079] Wherein, after obtaining the engine torque corresponding to the target oil amount and the current speed, the corresponding main pump power can be calculated by using the engine torque.

[0080] It should be noted that the main pump power (which can be understood as the hydraulic power of the hydraulic pump of the excavator) can be regarded as the load of the engine. If the load torque that the engine undertakes is greater than the current output torque capacity of the engine, the speed of the engine will decrease, which will lead to poor pump gas capacity, and further reduce the output torque of the engine (the work capacity of the engine is affected by oil and gas). Therefore, based on the engine torque (i.e. the best torque that the engine can exert based on the current intake amount under transient loading process), the corresponding main pump power is determined, which can effectively avoid a series of problems caused by the decrease of the engine speed, such as poor pump gas capacity.

[0081] Optionally, the implementation process of determining the corresponding main pump power based on the engine torque can be referred to the steps shown in Figure 3 and the corresponding explanation.

[0082] The above-mentioned S201-S203 shows the process, which can use the universal characteristic table of the engine to determine the engine torque corresponding to the target oil amount and the current speed, so as to determine the corresponding main pump power by using the best torque that the engine can exert based on the current intake amount under transient loading process, and avoid the decrease of the engine speed.

[0083] As shown in Figure 3 , the flowchart of another hydraulic pump control method provided by the embodiment of the present application is shown, which includes the following steps.

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

[0085] Wherein, the engine torque and the maximum output power of the engine have a corresponding conversion relationship, and the maximum output power of the engine can be calculated by using the conversion relationship.

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

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

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

[0089] It can be understood that the excavator is powered by the hydraulic pump when working, and the user adjusts the gear setting power of the hydraulic pump in real time to obtain the self-generated required excavating power.

[0090] S303: Determine the main pump power based on the minimum of 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 of the gear setting power and the maximum output power, and the minimum is determined as the main pump power.

[0092] In possible embodiments, if the gear setting power is less than the maximum output power, the gear setting power is determined as the main pump power, and 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 above-mentioned S301-S303 flow chart determines the main pump power based on the minimum of the gear setting power and the maximum output power of the engine, which not only realizes the engine to exert the maximum output power in real time to improve the responsiveness and working 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] As shown in Figure 4 Another hydraulic pump control method provided by the embodiment of the present application is shown in the flow chart, which includes the following steps.

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

[0096] The hydraulic working condition 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, and the gear setting speed is based on a manual input from a user of the excavator.

[0097] S402: Calculate the first power limit flow and the second power limit flow based on the main pump power and the hydraulic working condition parameters.

[0098] The hydraulic pump controller of the excavator has a corresponding control logic, which can calculate the first power limit flow and the second power limit flow based on the main pump power and the hydraulic working condition parameters.

[0099] In some examples, in combination with the process of determining the main pump power based on the smoke limit power, the control logic of the hydraulic pump controller for outputting the first power limit flow and the second power limit flow according to the main pump power and the hydraulic working condition parameters can be summarized as Figure 6 ​

[0100] S403: Trigger the first hydraulic pump to work according to the first power limited flow, and the second hydraulic pump to work according to the second power limited flow.

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

[0102] The above S401-S403 flow can trigger the first hydraulic pump to work according to the first power limited flow and the second hydraulic pump to work according to the second power limited flow by the main pump power and the hydraulic working condition parameters, and the normal operation of the excavator has been completed.

[0103] As shown in the figure, the architecture of the hydraulic pump control device provided by the embodiment of the application is shown in the figure, which includes the following units. Figure 5 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 of the engine and the current speed; the smoke limit power is determined based on the ratio between the current intake and the theoretical air-fuel ratio.

[0104] The power correction unit 200 is used to correct the smoke limit power by using the pre-calibrated correction coefficient to obtain the corrected smoke limit power.

[0105] The power determination unit 300 is used to determine the corresponding main pump power based on the corrected smoke limit power and the current speed.

[0106] Optionally, the power determination unit 300 is specifically used to determine the target oil quantity corresponding to the corrected smoke limit power; the target oil quantity represents the oil quantity available for the engine to burn; determine the engine torque corresponding to the target oil quantity 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 quantities and sample speeds; determine the main pump power based on the engine torque.

[0107] 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 manually input by the user of the excavator; determine the main pump power based on the minimum value of the gear setting power and the maximum output power.

[0108] The trigger working unit 400 is used to trigger the hydraulic pump of the excavator to work according to the main pump power.

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

[0110] Optionally, the hydraulic pump of the excavator comprises a first hydraulic pump and a second hydraulic pump, and the triggering unit 400 is specifically configured to: obtain a hydraulic working condition parameter of the excavator; the hydraulic working condition parameter comprises a gear setting speed, a required flow and a pressure of the first hydraulic pump, and a required flow and a pressure of the second hydraulic pump; the gear setting speed is manually input by a user of the excavator; based on the main pump power and the hydraulic working condition parameter, 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] The various units shown above determine the corresponding main pump power based on the smoke limited power of the engine, ensure that the engine of the excavator can output the best performance in real time, avoid the engine speed from being reduced, and thus improve the responsiveness and operation efficiency of the excavator.

[0112] The application further provides a computer readable storage medium, which comprises a stored program, wherein the program executes the hydraulic pump control method provided in the application.

[0113] The application further provides an excavator, which comprises a processor, a memory and a bus. The processor is connected with the memory through the bus, the memory is used for storing a program, and the processor is used for running the program, wherein the program executes the hydraulic pump control method provided in the application when running.

[0114] In addition, the functions described above in the embodiments of the application can be executed at least partially by one or more hardware logic components. For example, non-limiting examples of exemplary types of hardware logic components that can be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system on a chip (SOCs), complex programmable logic devices (CPLDs), and the like.

[0115] Although several implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the application. Certain features described in the context of separate embodiments can also be implemented together in a single embodiment. Conversely, various features described in the context of a single embodiment can also be implemented separately or in any suitable subcombination.

[0116] The above description is merely exemplary of the application and of the application of the principles thereof and the application is not limited to the disclosed technical features or combinations thereof. It is intended to be apparent to one skilled in the art that the scope of the disclosure is not limited to the technical solutions formed by the specific combinations of the technical features disclosed above, and also includes other technical solutions formed by the combinations of the technical features disclosed above or their equivalent features without departing from the above disclosed concept. For example, technical solutions formed by the mutual replacement of the above features and technical features with similar functions disclosed in the application (but not limited to) are also included.

Claims

1. A hydraulic pump control method characterized by, The method comprises the following steps: obtaining a smoke limit power message reported by an engine in real time; the smoke limit power message comprises a smoke limit power of the engine and a current rotating speed; the smoke limit power is determined based on a ratio between a current intake amount and a theoretical air-fuel ratio; correcting the smoke limit power by using a pre-calibrated correction coefficient to obtain a corrected smoke limit power; determining a corresponding main pump power based on the corrected smoke limit power and the current rotating speed; triggering a hydraulic pump of the excavator to work according to the main pump power; wherein the hydraulic pump of the excavator comprises a first hydraulic pump and a second hydraulic pump, and the process of triggering the hydraulic pump of the excavator to work according to the main pump power comprises the following steps: obtaining hydraulic working condition parameters of the excavator; the hydraulic working condition parameters comprise a gear setting rotating speed, a required flow and a pressure of the first hydraulic pump, and a required flow and a pressure of the second hydraulic pump; the gear setting rotating speed is manually input by a user of the excavator; calculating a first power limit flow and a second power limit flow based on the main pump power and the hydraulic working condition parameters; triggering 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.

2. The method of claim 1, wherein, determining a corresponding main pump power based on the corrected smoke limit power and the current rotating speed comprises: determining a corresponding target oil amount based on the corrected smoke limit power; the target oil amount represents an oil amount available for combustion of the engine; determining an engine torque corresponding to the target oil amount and the current rotating speed based on a universal characteristic table of the engine; the universal characteristic table comprises a plurality of sample engine torques, corresponding sample oil amounts, and sample rotating speeds; determining a corresponding main pump power based on the engine torque.

3. The method of claim 2, wherein, determining a corresponding main pump power based on the engine torque comprises: 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 manually input by a user of the excavator; determining the main pump power based on a minimum value between the gear setting power and the maximum output power.

4. A hydraulic pump control device characterized by comprising: The method comprises the following steps: a message monitoring unit is configured to obtain a smoke limit power message reported by an engine in real time; the smoke limit power message comprises a smoke limit power of the engine and a current rotating speed; the smoke limit power is determined based on a ratio between a current intake amount and a theoretical air-fuel ratio; a power correction unit is configured to correct the smoke limit power by using a pre-calibrated correction coefficient to obtain a corrected smoke limit power; a power determination unit is configured to determine a corresponding main pump power based on the corrected smoke limit power and the current rotating speed; The triggering unit is configured to trigger the hydraulic pump of the excavator to work according to the main pump power; wherein the hydraulic pump of the excavator comprises a first hydraulic pump and a second hydraulic pump, and the process of triggering the hydraulic pump of the excavator to work according to the main pump power comprises: obtaining hydraulic working condition parameters of the excavator; the hydraulic working condition parameters comprise a gear setting speed, a required flow and a pressure of the first hydraulic pump, and a required flow and a pressure of the second hydraulic pump; the gear setting speed is manually input by a user of the excavator; a first power limiting flow and a second power limiting flow are calculated based on the main pump power and the hydraulic working condition parameters; 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.

5. The apparatus of claim 4, wherein, The power determination unit is specifically configured to: determine a target oil amount corresponding to the corrected smoke limited power; the target oil amount represents an oil amount available for combustion of the engine; determine an engine torque corresponding to the target oil amount and the current speed based on a universal characteristic table of the engine; the universal characteristic table comprises a plurality of sample engine torques, and corresponding sample oil amounts and sample speeds; determine a main pump power corresponding to the engine torque.

6. The apparatus of claim 4, wherein, The power determination unit is specifically configured to: determine a maximum output power of the engine based on the engine torque; obtain a gear setting power of the hydraulic pump; the gear setting power is manually input by a user of the excavator; determine the main pump power based on the minimum value between the gear setting power and the maximum output power.

7. A storage medium, characterized by The storage medium comprises a stored program, wherein the program is executed by the processor to perform the hydraulic pump control method of any one of claims 1-3.

8. An excavator characterized by comprising: comprise: a processor, a memory and a bus; the processor and the memory are connected through the bus; the memory is configured to store a program, and the processor is configured to run the program, wherein the program is executed by the processor to perform the hydraulic pump control method of any one of claims 1-3.

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