Hydraulic energy-saving control method, control system and controller

Abstract

The application discloses a hydraulic energy-saving control method, a control system and a controller. The control method comprises the following steps: acquiring the opening and closing state of a pilot handle and the main pump pressure; judging whether the pilot handle is fully opened; in the case that the pilot handle is fully opened, determining the input power according to the relationship between the main pump pressure and a preset value; and performing volume speed regulation on the control system according to the input power, so as to change the working mode of the excavator; wherein the working mode comprises a first working mode, a second working mode and a third working mode. According to the application, the working mode of the excavator is adjusted according to the opening and closing state of the pilot handle and the pressure of the main pump, and the volume speed regulation is adopted, so that the working state of the excavator can be adjusted more accurately, and the working efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of engineering machinery technology, specifically to a hydraulic energy-saving control method, control system and controller. Background Technology

[0002] Excavators, as multi-functional engineering machinery, can perform various tasks such as digging, loading, repairing, transporting, crushing, filling, and leveling. The types of materials they can handle also vary considerably, including dense sandy soil, soft clay, gravel, and soft rock. Their usage and requirements also differ; sometimes the focus is on maximizing productivity and power for powerful excavation; sometimes fuel economy is emphasized, with lower productivity requirements; and sometimes precision and safety are prioritized for fine-tuning operations.

[0003] When the engine and pump work together, a combined working characteristic exists, where the combined working efficiency is related to the pump's speed, pressure, and flow rate. Generally, the engine-hydraulic pump system cannot operate at its optimal state under all working conditions, resulting in some energy loss. The hydraulic system output of a hydraulic excavator should adapt to changes in load and power requirements. During excavator operation, frequent compound movements of two or more actions are required. Furthermore, due to the complex working environment, strong external interference, and large variations in workload, improper handling of hydraulic excavators can lead to significant pressure and flow losses. Consequently, the pump's output power may far exceed the load demand, resulting in energy loss.

[0004] Due to differences in environment and work objects, the power requirements of the engine vary. Therefore, it is necessary to set the engine power output according to the power of the hydraulic system to avoid mismatch between engine power and hydraulic system power caused by setting the power too high or too low. Especially when the external load is small, if the engine output power is set too high, the system will have excess power, causing the variable pump to frequently operate at high speed and small displacement. This will lead to increased frictional power loss and reduced volumetric efficiency of the variable pump, while also increasing engine fuel consumption.

[0005] Existing power mode selection control systems generally suffer from the following problems: First, the selection of working modes is done in stages rather than continuously, making precise energy-saving control impossible. Too many stages (e.g., a Hyundai hydraulic excavator has seven stages) inconvenient for operators. Second, excavators encounter a wide variety of working conditions, and the soil quality cannot always be accurately assessed. Therefore, the operator's choice of operating mode based on experience is subjective, making it difficult to achieve optimal energy-saving results. Furthermore, frequent adjustments to the operating mode are impractical. Finally, the operation of a hydraulic excavator consists of four stages: digging, full bucket lifting, unloading, and empty bucket return. While the digging resistance is difficult to estimate, the power required for the other three stages can be obtained through testing and calculation. Engine-hydraulic pump energy-saving control systems can only roughly consider the power required for the entire digging process, neglecting the variable power requirements, resulting in low energy utilization. Therefore, existing solutions cannot precisely adjust the excavator's working state. Summary of the Invention

[0006] The purpose of this application is to provide a hydraulic energy-saving control method, control system, and controller to solve the problem of insufficient adjustment accuracy of the working state of excavators in the prior art.

[0007] To achieve the above objectives, the first aspect of this application provides a hydraulic energy-saving control method, applied to a controller of a hydraulic energy-saving control system, the control method comprising:

[0008] Obtain the opening / closing status of the pilot handle and the main pump pressure;

[0009] Determine if the pilot handle is fully open;

[0010] With the pilot handle fully open, the input power is determined based on the relationship between the main pump pressure and the preset value;

[0011] The control system is used to adjust the speed by volume based on the input power in order to change the working mode of the excavator.

[0012] The working modes include: the first working mode, the second working mode, and the third working mode.

[0013] In this embodiment, the preset value includes a first preset value. Determining the input power based on the relationship between the main pump pressure and the preset value when the pilot handle is fully open includes:

[0014] With the pilot handle fully open, determine whether the main pump pressure is less than the first preset value;

[0015] When the main pump pressure is less than the first preset value, the first input power of the main pump is determined according to the first preset ratio;

[0016] The control system performs volumetric speed regulation based on input power to change the excavator's operating mode, including:

[0017] The control system performs volumetric speed regulation based on the first input power to control the excavator to enter the first working mode.

[0018] In this embodiment, the preset value further includes a second preset value. Determining the input power based on the relationship between the main pump pressure and the preset value when the pilot handle is fully open also includes:

[0019] If the main pump pressure is greater than or equal to the first preset value, determine whether the main pump pressure is less than the second preset value;

[0020] When the main pump pressure is less than the second preset value, the second input power of the main pump is determined according to the second preset ratio;

[0021] The control system performs volumetric speed regulation based on input power to change the excavator's operating mode, including:

[0022] The control system performs volumetric speed regulation based on the second input power to control the excavator to enter the second working mode;

[0023] Among them, the first preset value is less than the second preset value, the second preset ratio is greater than the first preset ratio, and the second input power is greater than the first input power.

[0024] In this embodiment of the application, determining the input power based on the relationship between the main pump pressure and a preset value when the pilot handle is fully open further includes:

[0025] When the main pump pressure is greater than or equal to the second preset value, the third input power of the main pump is determined according to the third preset ratio;

[0026] The control system performs volumetric speed regulation based on input power to change the excavator's operating mode, including:

[0027] The control system performs volumetric speed regulation based on the third input power to control the excavator to enter the third working mode;

[0028] Among them, the third preset ratio is greater than the second preset ratio, and the third input power is greater than the second input power.

[0029] In this embodiment of the application, the control method further includes:

[0030] With the pilot handle not fully open, the first input power is determined according to the first preset ratio, and the excavator is controlled to enter the first working mode.

[0031] In this embodiment of the application, the control system further includes a displacement sensor, which communicates with the controller to obtain the opening and closing state of the pilot handle, including:

[0032] Receives the displacement of the pilot handle sent by the displacement sensor;

[0033] Determine if the displacement is greater than a preset distance;

[0034] If the displacement exceeds a preset distance, the pilot handle is determined to be fully open;

[0035] If the displacement is less than or equal to the preset distance, it is determined that the pilot handle is not fully open.

[0036] In this embodiment, the control system further includes a filter and a pressure sensor, the filter communicating with the controller and the pressure sensor respectively, and the control method further includes:

[0037] Receive the main pump pressure transmitted by the filter;

[0038] The main pump pressure is sent to the filter via a pressure sensor and then processed by the filter.

[0039] A second aspect of this application provides a controller, comprising:

[0040] The memory is configured to store instructions; and

[0041] The processor is configured to retrieve instructions from memory and, when executing instructions, to implement the aforementioned hydraulic energy-saving control method.

[0042] A third aspect of this application provides a hydraulic energy-saving control system, comprising:

[0043] Based on the controller described above;

[0044] The displacement sensor, which communicates with the controller, is configured to acquire the displacement of the pilot handle.

[0045] In this embodiment of the application, the control system further includes:

[0046] A pressure sensor is configured to acquire the pressure of the main pump;

[0047] The filter, which communicates with the pressure sensor and controller, is configured to process the pressure sent by the pressure sensor to obtain the main pump pressure.

[0048] A fourth aspect of this application provides a machine-readable storage medium storing instructions for causing a machine to perform the hydraulic energy-saving control method described above.

[0049] The above technical solution first obtains the open / closed state of the pilot handle and the main pump pressure, then determines whether the pilot handle is fully open. With the pilot handle fully open, the input power is determined based on the relationship between the main pump pressure and a preset value. Then, the control system performs volumetric speed regulation based on the input power to change the excavator's working mode. The working modes can include: a first working mode, a second working mode, and a third working mode. By adjusting the excavator's working mode based on the open / closed state of the pilot handle and the main pump pressure, and using volumetric speed regulation, the excavator's working state can be adjusted more precisely, improving work efficiency.

[0050] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0051] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings:

[0052] Figure 1 The diagram schematically illustrates a structural diagram of a hydraulic energy-saving control system according to an embodiment of this application;

[0053] Figure 2 A flowchart illustrating a hydraulic energy-saving control method according to an embodiment of this application is shown schematically.

[0054] Figure 3 A flowchart illustrating a hydraulic energy-saving control method according to a specific embodiment of this application is shown schematically.

[0055] Figure 4 A schematic block diagram of a controller according to an embodiment of this application is shown.

[0056] Explanation of reference numerals in the attached figures

[0057] 101 Controller, 102 Displacement Sensor

[0058] 103 Pressure Sensor 104 Filter Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the embodiments of this application and are not intended to limit the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0060] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0061] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0062] Figure 1 A schematic diagram illustrates the structure of a hydraulic energy-saving control system according to an embodiment of this application. Figure 1 As shown in the figure, this application provides a hydraulic energy-saving control system, which may include a controller 101, a displacement sensor 102, a pressure sensor 103, and a filter 104.

[0063] In this embodiment, the hydraulic energy-saving control system includes a controller 101, a displacement sensor 102, a pressure sensor 103, and a filter 104. The controller 101 communicates with both the displacement sensor 102 and the filter 104. The pressure sensor 103 also communicates with the filter 104. The displacement sensor 102 is configured to acquire the displacement of the pilot handle and send it to the controller 101, which then determines the opening / closing state of the pilot handle. The pressure sensor 103 is configured to acquire the pressure of the main pump and send it to the filter 104 for processing. After processing by the filter 104, the main pump pressure is obtained, and the filter 104 then sends the main pump pressure back to the controller 101. The controller 101 compares the main pump pressure with a preset value and adjusts the excavator's operating mode accordingly.

[0064] Figure 2 A flowchart illustrating a hydraulic energy-saving control method according to an embodiment of this application is shown schematically. Figure 2 As shown, this application provides a hydraulic energy-saving control method, and this application mainly applies this control method to the above-mentioned... Figure 1 The controller 101 in the middle, the control method may include the following steps:

[0065] Step 201: Obtain the opening / closing status of the pilot handle and the main pump pressure;

[0066] Step 202: Determine if the pilot handle is fully open;

[0067] Step 203: With the pilot handle fully open, determine the input power based on the relationship between the main pump pressure and the preset value;

[0068] Step 204: Adjust the speed of the control system according to the input power to change the working mode of the excavator;

[0069] The working modes include: the first working mode, the second working mode, and the third working mode.

[0070] In this embodiment, pilot handles are located in front of the excavator cab seat, one on each side. The pilot handles are used by the excavator operator to generate secondary pressure through a pilot pump, which flows out from the pilot handle to the axial end of the main control valve (multi-way valve, distributor), pushing the main valve stem to control the operation, thus achieving manual control of the hydraulic system. The main pump pressure refers to the pressure value at the high-pressure oil outlet of the excavator's main pump. The preset value refers to a pre-set pressure value, i.e., the upper limit of the main pump pressure under this condition. Volumetric speed regulation refers to adjusting the movement speed of the actuator by changing the displacement of the variable pump or variable motor in the circuit.

[0071] The working mode refers to the excavator's operating mode, which may include a first working mode, a second working mode, and a third working mode. For example, the first working mode may refer to a fine-tuning mode, the second working mode may refer to a normal working mode, and the third working mode may refer to a heavy-duty working mode. Specifically, the fine-tuning mode indicates that the excavator's engine is under low load. The normal working mode indicates that the excavator's engine is under normal load. The heavy-duty working mode indicates that the excavator's engine is under high load.

[0072] First, the open / closed state of the pilot handle is acquired, which can be fully open or partially open. In one example, a displacement sensor can be used to acquire the pilot handle's open / closed state. In another example, a pressure sensor can be used. The open / closed state of the pilot handle can be determined by comparing its displacement or pressure with a reference value. By acquiring the open / closed state of the pilot switch, the excavator's load status can be preliminarily determined, and the excavator's operating mode can be adjusted accordingly.

[0073] After obtaining the open / closed state of the pilot handle, it is determined whether the pilot handle is fully open. If the pilot handle is not fully open, it indicates that the engine load is low, and the excavator is controlled to enter a fine-tuning mode. If the pilot handle is fully open, the relationship between the main pump pressure and a preset value is then determined. The preset value can include a first preset value and a second preset value, where the first preset value is less than the second preset value. Based on the relationship between the main pump pressure and the preset value, the input power can be determined, and then the control system is adjusted for volumetric speed regulation based on the input power to change the excavator's working mode. For example, the engine input power can be adjusted by different proportions when the main pump pressure is less than the first preset value, greater than the first preset value but less than the second preset value, and greater than the second preset value. The input power is then used to adjust the control system for volumetric speed regulation to change the excavator's working mode. By adjusting the excavator's working mode based on the open / closed state of the pilot handle and the main pump pressure, the excavator's working state can be adjusted more precisely, improving work efficiency.

[0074] The above technical solution first obtains the open / closed state of the pilot handle and the main pump pressure, then determines whether the pilot handle is fully open. With the pilot handle fully open, the input power is determined based on the relationship between the main pump pressure and a preset value. Then, the control system performs volumetric speed regulation based on the input power to change the excavator's working mode. The working modes can include: a first working mode, a second working mode, and a third working mode. By adjusting the excavator's working mode based on the open / closed state of the pilot handle and the main pump pressure, and using volumetric speed regulation, the excavator's working state can be adjusted more precisely, improving work efficiency.

[0075] In this embodiment, the preset value includes a first preset value. Determining the input power based on the relationship between the main pump pressure and the preset value when the pilot handle is fully open may include:

[0076] With the pilot handle fully open, determine whether the main pump pressure is less than the first preset value;

[0077] When the main pump pressure is less than the first preset value, the first input power of the main pump is determined according to the first preset ratio;

[0078] The control system performs volumetric speed regulation based on input power to change the excavator's operating mode, including:

[0079] The control system performs volumetric speed regulation based on the first input power to control the excavator to enter the first working mode.

[0080] Specifically, the first preset value refers to the largest of the pre-set pressure values. Input power refers to the engine's input power. The first input power refers to the input power adjusted according to the first preset ratio when the main pump pressure is lower than the first preset value. The first preset ratio refers to the pre-set ratio that needs to be adjusted when the main pump pressure is lower than the first preset value. For example, when the main pump pressure is lower than the first preset value, the first preset ratio can be 70% of the rated power, then the first input power is also 70% of the rated power. Once the first input power of the main pump is determined, the control system is volumetrically speed-regulated based on the first input power. By adjusting the volumetric speed of the control system, the output flow rate of the control system can be changed, thereby adjusting the output power of the control system to reduce throttling losses. Furthermore, when the main pump pressure is lower than the first preset value, it indicates that the engine load is low, and the excavator is controlled to enter a fine-operation mode. By judging the relationship between the main pump pressure and the preset value, the engine load status can be determined, and the excavator's working state can be adjusted accordingly.

[0081] In this embodiment, the preset value further includes a second preset value. Determining the input power based on the relationship between the main pump pressure and the preset value when the pilot handle is fully open may further include:

[0082] If the main pump pressure is greater than or equal to the first preset value, determine whether the main pump pressure is less than the second preset value;

[0083] When the main pump pressure is less than the second preset value, the second input power of the main pump is determined according to the second preset ratio;

[0084] The control system performs volumetric speed regulation based on input power to change the excavator's operating mode, including:

[0085] The control system performs volumetric speed regulation based on the second input power to control the excavator to enter the second working mode;

[0086] Among them, the first preset value is less than the second preset value, the second preset ratio is greater than the first preset ratio, and the second input power is greater than the first input power.

[0087] Specifically, the second preset value refers to the minimum value among the preset pressure values. The second input power refers to the input power adjusted according to the second preset ratio when the main pump pressure is greater than or equal to the first preset value and less than the second preset value. The second preset ratio refers to the preset ratio that needs to be adjusted when the main pump pressure is greater than or equal to the first preset value and less than the second preset value. For example, when the main pump pressure is greater than or equal to the first preset value and less than the second preset value, the second preset ratio can be 85% of the rated power, then the second input power is also 85% of the rated power. When the second input power of the main pump is determined, the control system is volumetrically speed-regulated according to the second input power. By volumetrically speed-regulating the control system, the output flow of the control system can be changed, thereby adjusting the output power of the control system to reduce throttling losses. Furthermore, when the main pump pressure is greater than or equal to the first preset value and less than the second preset value, it indicates that the engine load is normal, and the excavator is controlled to enter the normal operating mode. By judging the relationship between the main pump pressure and the preset value, the engine load status can be determined, and the working status of the excavator can be adjusted accordingly.

[0088] In this embodiment of the application, determining the input power based on the relationship between the main pump pressure and a preset value when the pilot handle is fully open may further include:

[0089] When the main pump pressure is greater than or equal to the second preset value, the third input power of the main pump is determined according to the third preset ratio;

[0090] The control system performs volumetric speed regulation based on input power to change the excavator's operating mode, including:

[0091] The control system performs volumetric speed regulation based on the third input power to control the excavator to enter the third working mode;

[0092] Among them, the third preset ratio is greater than the second preset ratio, and the third input power is greater than the second input power.

[0093] Specifically, the third input power refers to the input power adjusted according to the third preset ratio when the main pump pressure is greater than or equal to the second preset value. The third preset ratio is a pre-set proportion by which the input power needs to be adjusted when the main pump pressure is greater than or equal to the second preset value. For example, when the main pump pressure is greater than or equal to the second preset value, the third preset ratio can be 100% of the rated power, then the third input power is also 100% of the rated power. Once the third input power of the main pump is determined, the control system is volumetrically speed-regulated based on this power. By adjusting the volumetric speed of the control system, the output flow rate can be changed, thereby adjusting the output power of the control system to reduce throttling losses. Furthermore, when the main pump pressure is greater than or equal to the second preset value, it indicates that the engine load is high, and the excavator is controlled to enter a high-power operation mode. By judging the relationship between the main pump pressure and the preset value, the engine load status can be determined, and the excavator's working state can be adjusted accordingly.

[0094] In this embodiment of the application, the control method may further include:

[0095] With the pilot handle not fully open, the first input power is determined according to the first preset ratio, and the excavator is controlled to enter the first working mode.

[0096] Specifically, when the pilot handle is not fully open, it indicates that the engine load is low. At this time, the input power is adjusted according to the first preset ratio to obtain the first input power. Simultaneously, the excavator is controlled to enter a fine-tuning mode. For example, it is adjusted according to the first preset ratio minus 70% of the rated power to obtain the first input power minus 70% of the rated power. By judging the open / closed state of the pilot handle, the engine load status can be determined, and thus the excavator's operating state can be adjusted.

[0097] In this embodiment of the application, the control system further includes a displacement sensor, which communicates with the controller to obtain the opening and closing state of the pilot handle, which may include:

[0098] Receives the displacement of the pilot handle sent by the displacement sensor;

[0099] Determine if the displacement is greater than a preset distance;

[0100] If the displacement exceeds a preset distance, the pilot handle is determined to be fully open;

[0101] If the displacement is less than or equal to the preset distance, it is determined that the pilot handle is not fully open.

[0102] Specifically, a displacement sensor, also known as a linear sensor, is a linear device that uses metal induction to convert various measured physical quantities into electrical signals. The preset distance refers to a pre-defined critical displacement distance for the pilot handle. If the displacement exceeds the preset distance, the pilot handle is fully open; if the displacement is less than the preset distance, the pilot handle is not fully open. The displacement sensor can collect the displacement of the pilot handle, which can then be used by the controller to determine the open / closed state of the pilot handle. After collecting the displacement of the pilot handle, the displacement sensor sends the displacement to the controller. The controller receives the displacement sent by the displacement sensor and determines whether the displacement is greater than the preset distance. If the displacement is greater than the preset distance, the pilot handle is determined to be fully open; if the displacement is less than or equal to the preset distance, the pilot handle is determined to be not fully open. By determining whether the pilot handle is fully open using the displacement sensor, the engine load status can be determined, and the excavator's working status can be adjusted accordingly.

[0103] In this embodiment, the control system further includes a filter and a pressure sensor, the filter communicating with the controller and the pressure sensor respectively, and the control method may further include:

[0104] Receive the main pump pressure transmitted by the filter;

[0105] The main pump pressure is sent to the filter via a pressure sensor and then processed by the filter.

[0106] Specifically, a filter is a filtering circuit composed of capacitors, inductors, and resistors. A filter can effectively filter out specific frequencies or frequencies outside of those frequencies in a power supply line, obtaining a power signal of a specific frequency, or eliminating a power signal after a specific frequency has been eliminated. A pressure sensor is a device or apparatus that can sense pressure signals and convert them into usable output electrical signals according to a certain rule. The control system may also include filters and pressure sensors, with the filter communicating with the controller and the pressure sensor respectively. The pressure sensor can acquire the pressure of the main pump. Because the signal acquired by the pressure sensor contains interference signals, the pressure sensor can send the acquired pressure to the filter. The filter receives the pressure sent by the pressure sensor and processes the pressure to obtain the main pump pressure after filtering out interference signals. The filter can send the main pump pressure to the controller. After receiving the main pump pressure sent by the filter, the controller judges the main pump pressure to adjust the excavator's working state. Preferably, the main pump power can be obtained from the sensor via power, thereby adjusting the excavator's working state. By acquiring the main pump pressure through the filter and pressure sensor, the engine load state can be determined, thereby adjusting the excavator's working state.

[0107] The above technical solution first obtains the open / closed state of the pilot handle and the main pump pressure, then determines whether the pilot handle is fully open. With the pilot handle fully open, the input power is determined based on the relationship between the main pump pressure and a preset value. Then, the control system performs volumetric speed regulation based on the input power to change the excavator's working mode. The working modes can include: a first working mode, a second working mode, and a third working mode. By adjusting the excavator's working mode based on the open / closed state of the pilot handle and the main pump pressure, and using volumetric speed regulation, the excavator's working state can be adjusted more precisely, improving work efficiency.

[0108] Figure 3 A flowchart illustrating a hydraulic energy-saving control method according to a specific embodiment of this application is shown. Figure 3 As shown in the figure, a specific embodiment of this application provides a hydraulic energy-saving control method, which may include the following steps:

[0109] S1. The handle displacement sensor collects the displacement of the pilot handle;

[0110] S2. The controller receives the displacement sent by the handle displacement sensor;

[0111] S3, The pressure sensor collects the pressure of the main pump;

[0112] S4 and the A / D filter receive the pressure sent by the pressure sensor and process the pressure to obtain the main pump pressure P;

[0113] S5, The controller receives the main pump pressure P sent by the filter;

[0114] S6. Determine if the displacement pilot handle is fully open; if not, proceed to S7; if yes, proceed to S8.

[0115] S7. Control the excavator to enter the fine operation mode (i.e., the first operation mode in this application);

[0116] S8. Determine whether the main pump pressure P is greater than or equal to T1 (i.e., the first preset value in this application). If not, proceed to S9; if yes, proceed to S10.

[0117] S9. Control the excavator to enter the fine operation mode;

[0118] S10. Determine whether the main pump pressure P is greater than or equal to T2 (i.e., the second preset value in this application). If not, proceed to S11; if yes, proceed to S12.

[0119] S11. Control the excavator to enter the normal operation mode (i.e., the second operation mode in this application);

[0120] S12. Control the excavator to enter the heavy-duty working mode (i.e., the third working mode in this application).

[0121] Specifically, the displacement of the pilot handle is collected by a handle displacement sensor, and then sent to the controller. The pressure of the main pump is collected by a pressure sensor. Because the pressure signal collected by the pressure sensor contains interference signals, the pressure is sent to a filter for processing to obtain the processed main pump pressure. This processed pressure is then sent to the controller. First, the controller determines whether the pilot handle is fully open. If the pilot handle is not fully open, the excavator enters a fine-tuning mode. If the pilot handle is not fully open, the controller determines whether the main pump pressure is greater than a first preset value. If the main pump pressure is less than the first preset value, the excavator enters a fine-tuning mode. If the main pump pressure is greater than or equal to the first preset value, the controller determines whether the main pump pressure is greater than or equal to a second preset value. If the main pump pressure is greater than or equal to the second preset value, the excavator enters a heavy-duty working mode. If the main pump pressure is less than the second preset value, the excavator enters a normal working mode. By adjusting the excavator's working mode based on the open / closed state of the pilot handle and the main pump pressure, the excavator's working state can be adjusted more precisely, improving work efficiency.

[0122] Figure 4 A schematic block diagram of a controller according to an embodiment of this application is shown. Figure 4 As shown in the figure, this application provides a controller that may include:

[0123] Memory 410 is configured to store instructions; and

[0124] The processor 420 is configured to retrieve instructions from the memory 410 and to implement the aforementioned hydraulic energy-saving control method when executing the instructions.

[0125] Specifically, in this embodiment of the application, the processor 420 can be configured to:

[0126] Obtain the opening / closing status of the pilot handle and the main pump pressure;

[0127] Determine if the pilot handle is fully open;

[0128] With the pilot handle fully open, the input power is determined based on the relationship between the main pump pressure and the preset value;

[0129] The control system is used to adjust the speed by volume based on the input power in order to change the working mode of the excavator.

[0130] The working modes include: the first working mode, the second working mode, and the third working mode.

[0131] Furthermore, the processor 420 can also be configured as follows:

[0132] The preset values ​​include a first preset value. With the pilot handle fully open, the input power is determined based on the relationship between the main pump pressure and the preset value, including:

[0133] With the pilot handle fully open, determine whether the main pump pressure is less than the first preset value;

[0134] When the main pump pressure is less than the first preset value, the first input power of the main pump is determined according to the first preset ratio;

[0135] The control system performs volumetric speed regulation based on input power to change the excavator's operating mode, including:

[0136] The control system performs volumetric speed regulation based on the first input power to control the excavator to enter the first working mode.

[0137] Furthermore, the processor 420 can also be configured as follows:

[0138] The preset values ​​also include a second preset value. With the pilot handle fully open, the input power is determined based on the relationship between the main pump pressure and the preset value, and this also includes:

[0139] If the main pump pressure is greater than or equal to the first preset value, determine whether the main pump pressure is less than the second preset value;

[0140] When the main pump pressure is less than the second preset value, the second input power of the main pump is determined according to the second preset ratio;

[0141] The control system performs volumetric speed regulation based on input power to change the excavator's operating mode, including:

[0142] The control system performs volumetric speed regulation based on the second input power to control the excavator to enter the second working mode;

[0143] Among them, the second preset ratio is greater than the first preset ratio, and the second input power is greater than the first input power.

[0144] Furthermore, the processor 420 can also be configured as follows:

[0145] With the pilot handle fully open, determining the input power based on the relationship between the main pump pressure and the preset value also includes:

[0146] When the main pump pressure is greater than or equal to the second preset value, the third input power of the main pump is determined according to the third preset ratio;

[0147] The control system performs volumetric speed regulation based on input power to change the excavator's operating mode, including:

[0148] The control system performs volumetric speed regulation based on the third input power to control the excavator to enter the third working mode;

[0149] Among them, the third preset ratio is greater than the second preset ratio, and the third input power is greater than the second input power.

[0150] Furthermore, the processor 420 can also be configured as follows:

[0151] With the pilot handle not fully open, the first input power is determined according to the first preset ratio, and the excavator is controlled to enter the first working mode.

[0152] Furthermore, the processor 420 can also be configured as follows:

[0153] The control system also includes a displacement sensor, which communicates with the controller to obtain the opening and closing state of the pilot handle, including:

[0154] Receives the displacement of the pilot handle sent by the displacement sensor;

[0155] Determine if the displacement is greater than a preset distance;

[0156] If the displacement exceeds a preset distance, the pilot handle is determined to be fully open;

[0157] If the displacement is less than or equal to the preset distance, it is determined that the pilot handle is not fully open.

[0158] Furthermore, the processor 420 can also be configured as follows:

[0159] The control system also includes a filter and a pressure sensor, the filter communicating with the controller and the pressure sensor respectively. The control method also includes:

[0160] Receive the main pump pressure transmitted by the filter;

[0161] The main pump pressure is sent to the filter via a pressure sensor and then processed by the filter.

[0162] The above technical solution first obtains the open / closed state of the pilot handle and the main pump pressure, then determines whether the pilot handle is fully open. With the pilot handle fully open, the input power is determined based on the relationship between the main pump pressure and a preset value. Then, the control system performs volumetric speed regulation based on the input power to change the excavator's working mode. The working modes can include: a first working mode, a second working mode, and a third working mode. By adjusting the excavator's working mode based on the open / closed state of the pilot handle and the main pump pressure, and using volumetric speed regulation, the excavator's working state can be adjusted more precisely, improving work efficiency.

[0163] like Figure 1 As shown in the figure, this application embodiment provides a hydraulic energy-saving control system, which may include:

[0164] The aforementioned controller 101;

[0165] Displacement sensor 102, which communicates with controller 101, is configured to acquire the displacement of pilot handle.

[0166] Specifically, the hydraulic energy-saving control system may include a controller 101 and a displacement sensor 102, which communicates with the controller 101. The displacement sensor 102 is configured to acquire the displacement of the pilot handle and send the acquired displacement to the controller 101. The controller 101 receives the displacement sent by the displacement sensor 102 to determine the opening and closing state of the pilot handle.

[0167] In this embodiment of the application, the system may further include:

[0168] Pressure sensor 103 is configured to acquire the pressure of the main pump;

[0169] Filter 104, which communicates with pressure sensor 103 and controller 101, is configured to process the pressure sent by pressure sensor 103 to obtain the main pump pressure.

[0170] Specifically, the hydraulic energy-saving control system may include a pressure sensor 103 and a filter 104. The filter 104 communicates with both the controller 101 and the pressure sensor 103. The pressure sensor 103 is configured to acquire the pressure of the main pump. Because the signal acquired by the pressure sensor 103 contains interference signals, the pressure sensor 103 sends the acquired pressure to the filter 104. The filter receives the pressure sent by the pressure sensor 103 and processes the pressure to obtain the main pump pressure after filtering out interference signals. The filter 104 sends the main pump pressure to the controller 101, and the controller 101 receives the main pump pressure sent by the filter 104 to adjust the excavator's operating status.

[0171] The above technical solution first obtains the open / closed state of the pilot handle and the main pump pressure, then determines whether the pilot handle is fully open. With the pilot handle fully open, the input power is determined based on the relationship between the main pump pressure and a preset value. Then, the control system performs volumetric speed regulation based on the input power to change the excavator's working mode. The working modes can include: a first working mode, a second working mode, and a third working mode. By adjusting the excavator's working mode based on the open / closed state of the pilot handle and the main pump pressure, and using volumetric speed regulation, the excavator's working state can be adjusted more precisely, improving work efficiency.

[0172] This application also provides a machine-readable storage medium storing instructions for causing a machine to perform the aforementioned hydraulic energy-saving control method.

[0173] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0174] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0175] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0176] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0177] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0178] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0179] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0180] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0181] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A hydraulic energy saving control method, characterized by, A controller applied to a hydraulic energy-saving control system, wherein the control method includes: Obtain the opening / closing status of the pilot handle and the main pump pressure; Determine whether the pilot handle is fully open; With the pilot handle fully open, the input power is determined based on the relationship between the main pump pressure and a preset value; The control system is subjected to volumetric speed regulation based on the input power to change the working mode of the excavator. The volumetric speed regulation refers to adjusting the movement speed of the actuator by changing the displacement of the variable pump or variable motor in the loop of the control system. The working modes include: a first working mode, a second working mode, and a third working mode.

2. The control method according to claim 1, characterized by, The preset value includes a first preset value, and determining the input power based on the relationship between the main pump pressure and the preset value when the pilot handle is fully open includes: With the pilot handle fully open, determine whether the main pump pressure is less than a first preset value; When the main pump pressure is less than the first preset value, the first input power of the main pump is determined according to the first preset ratio; The step of adjusting the volumetric speed of the control system based on the input power to change the excavator's operating mode includes: The control system performs volumetric speed regulation based on the first input power to control the excavator to enter the first operating mode.

3. The control method according to claim 2, characterized by, The preset value also includes a second preset value, and the step of determining the input power based on the relationship between the main pump pressure and the preset value when the pilot handle is fully open further includes: If the main pump pressure is greater than or equal to the first preset value, determine whether the main pump pressure is less than the second preset value; When the main pump pressure is less than the second preset value, the second input power of the main pump is determined according to the second preset ratio; The step of adjusting the volumetric speed of the control system based on the input power to change the excavator's operating mode includes: The control system performs volumetric speed regulation based on the second input power to control the excavator to enter the second operating mode; Wherein, the first preset value is less than the second preset value, the second preset ratio is greater than the first preset ratio, and the second input power is greater than the first input power.

4. The control method according to claim 3, characterized by The step of determining the input power based on the relationship between the main pump pressure and a preset value when the pilot handle is fully open also includes: When the main pump pressure is greater than or equal to the second preset value, the third input power of the main pump is determined according to the third preset ratio; The step of adjusting the volumetric speed of the control system based on the input power to change the excavator's operating mode includes: The control system performs volumetric speed regulation based on the third input power to control the excavator to enter the third operating mode; Wherein, the third preset ratio is greater than the second preset ratio, and the third input power is greater than the second input power.

5. The control method according to claim 2, characterized by, The control method further includes: When the pilot handle is not fully open, the first input power is determined according to the first preset ratio, and the excavator is controlled to enter the first working mode.

6. The control method according to claim 1, characterized by, The control system further includes a displacement sensor, which communicates with the controller to obtain the opening and closing state of the pilot handle, including: Receive the displacement of the pilot handle sent by the displacement sensor; Determine whether the displacement is greater than a preset distance; If the displacement is greater than the preset distance, it is determined that the pilot handle is fully open; If the displacement is less than or equal to the preset distance, it is determined that the pilot handle is not fully open.

7. The control method according to claim 1, characterized by, The control system further includes a filter and a pressure sensor, the filter communicating with the controller and the pressure sensor respectively, and the control method further includes: Receive the main pump pressure sent by the filter; The main pump pressure is sent to the filter via the pressure sensor and processed by the filter.

8. A controller characterized by comprising: include: The memory is configured to store instructions; as well as The processor is configured to retrieve the instructions from the memory and, when executing the instructions, to implement the hydraulic energy-saving control method according to any one of claims 1 to 7.

9. A hydraulic energy saving control system, characterized by, include: The controller according to claim 8; It also includes a displacement sensor, which communicates with the controller and is configured to acquire the displacement of the pilot handle.

10. The control system of claim 9, wherein, Also includes: A pressure sensor is configured to acquire the pressure of the main pump; A filter, communicating with the pressure sensor and the controller, is configured to process the pressure sent by the pressure sensor to obtain the main pump pressure.

11. A machine-readable storage medium, characterized in that, The machine-readable storage medium stores instructions for causing the machine to perform the hydraulic energy-saving control method according to any one of claims 1 to 7.

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