Method and system for controlling one-key Boost acceleration function of excavator

Abstract

The invention discloses a one-key boost acceleration function control method and system for an excavator, and the method comprises the steps: operating a rotation handle, starting one-key boost at the same time, generating pilot pressure, enabling the pilot pressure to rise to a target value from a non-instantaneous state, pushing a rotation valve core of a main valve to a maximum position, and enabling the current to be instantly loaded to the target value from an initial value; the current gear information of the excavator is obtained, the set power is obtained according to the current gear information, after the one-key boost is started, the set power is instantly increased to the power target value, and the flow is increased; the set rotating speed is obtained according to the current gear information, after the one-key boost is started, the set rotating speed is instantly increased to the rotating speed specific value, and then the flow is increased. According to the invention, almost immediate power output can be realized, so that the working efficiency is greatly improved, the device is particularly suitable for working conditions with extremely high requirements on operation timeliness, and construction inconvenience and low efficiency caused by response delay are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of excavator control, and particularly to a control method and system for one-key Boost acceleration function of an excavator. Background Art

[0002] In various large-scale engineering construction projects, the excavator is a key construction equipment. With its powerful excavation, loading and unloading, and material handling capabilities, it plays an irreplaceable role in the earthwork operation link. The overall load of the excavator is large. After the excavation in the loading operation is completed, the slewing operation is required to unload the materials in the bucket to a fixed position. Due to the large overall load of the vehicle and the fixed power setting, the dynamic performance of the slewing is insufficient, that is, there is an obvious delay from the instruction issued by the operation handle to the response of the power system.

[0003] In the standard mode, from the operation of the slewing handle to the main pump displacement reaching the target value, the whole process takes nearly 1 s. The pilot pressure rises from zero to the target value, and it takes 200 - 300 ms to push the spool valve. The current of the pump is loaded from the initial value to the target value, and the corresponding change in the main pump displacement takes about 300 - 500 ms.

[0004] Moreover, the existing power output of the excavator is mainly set according to the preset power and speed, and it is difficult to flexibly adapt to diverse working conditions. Under the constant power setting, the power adjustment range is limited. When encountering sudden heavy loads or scenarios that require short-term explosive power, the power cannot be quickly increased, affecting the operation effect; in the constant speed setting, the speed is difficult to change instantaneously and cannot provide sufficient power support for the operation in time. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the present invention provides a control method and system for one-key Boost acceleration function of an excavator. Through the one-key Boost function of the present invention, surging power can be instantly provided for the whole vehicle, thus solving the technical problems existing in the above-mentioned existing technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] In the first aspect, the present invention provides a control method for one-key Boost acceleration function of an excavator, including:

[0008] When operating the slewing handle, start the one-key boost at the same time to generate pilot pressure, and the pilot pressure instantly rises from zero to the target value, and push the slewing spool valve of the main valve to the maximum position, so that the current is instantly loaded from the initial value to the target value;

[0009] Obtain the current gear information of the excavator, obtain the set power according to the current gear information, and after starting the one-key boost, instantly raise the set power to the power target value and increase the flow rate;

[0010] Obtain the set rotational speed based on the current gear information. After starting the one - key boost, instantaneously increase the set rotational speed to a specific rotational speed value, thereby increasing the flow rate.

[0011] As a further technical solution, preset the action time of the one - key boost. Automatically stop after exceeding the action time of the one - key boost, and monitor the hydraulic oil temperature during the action time. When the hydraulic oil temperature exceeds the preset temperature, increase the heat dissipation.

[0012] As a further technical solution, after operating the slewing handle, a slewing overflow pressure is generated. After starting the one - key boost, the slewing overflow pressure increases. According to the relationship that the slewing torque is proportional to the slewing overflow pressure, the slewing torque increases as the slewing overflow pressure increases, thereby realizing the instantaneous loading of the slewing torque.

[0013] As a further technical solution, according to Power = Pressure × Rotational Speed × Displacement, under the condition that the pressure and rotational speed remain unchanged, when the set power instantaneously rises to the power target value, to meet the power target value, it is necessary to increase the displacement, thereby increasing the flow rate.

[0014] As a further technical solution, according to Flow Rate = Rotational Speed × Displacement, under the condition that the displacement remains unchanged, when the set rotational speed instantaneously rises to a specific rotational speed value, the flow rate increases.

[0015] As a further technical solution, the increase value of the set power instantaneously rising to the power target value is pre - calibrated according to different working conditions and the excavator operation site.

[0016] As a further technical solution, the increase value of the set rotational speed instantaneously rising to a specific rotational speed value is pre - calibrated according to different working conditions and the excavator operation site.

[0017] In the second aspect, the present invention provides a one - key Boost acceleration function control system for an excavator, including the following modules:

[0018] Current instantaneous loading module, configured to: operate the slewing handle and start the one - key boost simultaneously to generate a pilot pressure, and the pilot pressure instantaneously rises from zero to the target value, and push the slewing spool of the main valve to the maximum position, so that the current instantaneously loads from the initial value to the target value;

[0019] Power instantaneous loading module, configured to: obtain the current gear information of the excavator, obtain the set power according to the current gear information, after starting the one - key boost, instantaneously increase the set power to the power target value, and increase the flow rate;

[0020] Rotational speed instantaneous loading module, configured to: obtain the set rotational speed according to the current gear information, after starting the one - key boost, instantaneously increase the set rotational speed to a specific rotational speed value, thereby increasing the flow rate.

[0021] One or more technical solutions of the present invention have the following beneficial effects:

[0022] (1) In the one - key Boost acceleration function control method provided by the present invention, when the one - key Boost button is started, both the pilot pressure and current loading become transient processes. The swing spool is instantly pushed open to the maximum, and the main pump displacement reaches the maximum instantly, significantly shortening the time from the operation instruction being issued to the power response. Compared with the response time of nearly 1 second in the standard mode, near - instant power output can be achieved. This greatly improves the operation efficiency and is especially suitable for working conditions with extremely high requirements for operation timeliness, such as rapid swing operations in a narrow space, avoiding construction inconvenience and low efficiency caused by response delay.

[0023] (2) For excavators with constant - power settings, when the one - key Boost button is started and the swing handle is operated, the controller instantly raises the set power of the current gear to the power target value. In the constant - power state, the main pump displacement is adjusted to meet the increased power demand, accelerating the actions of the whole vehicle, enabling the excavator to flexibly adjust the power output under different working conditions; for excavators with fixed - speed settings, after the one - key Boost button is started, the controller instantly raises the set speed to a specific speed value, increasing the hydraulic oil flow rate and accelerating the actions of the whole vehicle.

[0024] (3) The action time of the one - key Boost function of the present invention is set to 8s and automatically stops when it times out. This effectively avoids the system being in a high - load operation state for a long time, protects the hydraulic components, and extends the service life of the equipment. The hydraulic oil temperature is detected in real - time within 8s, and when the temperature is too high, the system automatically increases heat dissipation to ensure that the equipment can also operate stably in a high - temperature environment, maintain good working performance, and reduce the failure rate caused by too high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0026] Figure 1 is a flow chart of the control method for the one - key Boost acceleration function of the excavator of the present invention; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0028] Embodiment 1

[0029] In this embodiment, a control method for the one-key Boost acceleration function of an excavator is provided. As Figure 1 shown, the specific method is as follows:

[0030] In a positive flow or fully electronic control operating system, the handle is responsible for converting the driver's operation intention into the corresponding pilot pressure. The pilot pressure pushes the spool of the main valve. The larger the opening of the spool, the more flow can pass through. At the same time, the control controller will output the corresponding control current to the main pump according to the pilot pressure of the handle, so that the main pump discharges the corresponding displacement. The current and displacement of the main pump are the characteristics of the main pump itself, and the two are in a positive correlation. The vehicle actions are realized according to the above process.

[0031] When the one-key Boost is started, instantaneous loading of the current can be achieved, specifically as follows:

[0032] In the standard mode, when operating the slewing handle, the pilot pressure rises from zero to the target value in about 200 - 300 ms, that is, the time to push the spool is about 200 - 300 ms. On this basis, the current loading of the pump from the initial value to the target value is about 300 - 500 ms, that is, the process corresponding to the main pump displacement from the initial value to the target value. The whole process takes nearly 1 s.

[0033] In this embodiment, when the driver operates the slewing handle and starts the one-key boost at the same time, a pilot pressure is generated, and the pilot pressure instantaneously rises from zero to the target value, directly pushing the slewing spool of the main valve to the maximum position, so that the current instantaneously loads from the initial value to the target value. That is, the opening of the slewing spool of the main valve is instantaneously opened to the maximum, and the main pump displacement is the largest, thus providing surging power. In this embodiment, no extra fuel consumption will occur because the vehicle power and speed remain unchanged, only the current loading time is shortened and the slewing system pressure is increased.

[0034] When the one-key Boost is started, instantaneous loading of the torque can be achieved, specifically as follows: After operating the slewing handle, a slewing overflow pressure is generated. When the one-key boost is started, it acts on the slewing overflow valve, making the slewing overflow pressure increase. According to the relationship that the slewing torque is proportional to the slewing overflow pressure, the slewing torque increases as the slewing overflow pressure increases, thus realizing the instantaneous loading of the slewing torque.

[0035] In this embodiment, the preset operation time of the one - key boost is set, and the specific operation time is 8s. When the operation time of the one - key boost (8s) is exceeded, this function will automatically stop. This can effectively protect the entire hydraulic components from being damaged due to long - term over - load. And within the operation time of the one - key boost (8s), the hydraulic oil temperature is monitored. There are many methods to monitor the hydraulic oil. In this embodiment, all vehicles are equipped with a hydraulic oil temperature sensor, and the monitoring of the hydraulic oil can be achieved by collecting the data of the hydraulic oil temperature sensor. In this embodiment, a resistive oil temperature sensor is used, and there is a certain relationship between the resistance and the temperature. When the hydraulic oil temperature exceeds the preset temperature, heat dissipation is increased.

[0036] When the one - key Boost is started, instantaneous power loading can be achieved, as follows: The excavator is set with constant power, that is, the power of each gear is fixed after the gear is set. First, obtain the current gear information of the excavator, and get the set power according to the current gear information. When the driver operates the slewing handle and starts the one - key boost at the same time, the set power of this vehicle in this gear is instantly increased to the power target value. The increase value of the set power instantly rising to the power target value is pre - calibrated according to different working conditions and the excavator operation site. According to the formula power = pressure × speed × displacement, in the normal mode, when loading operations are carried out, slewing will be accompanied by the boom lifting action. At this time, the overall vehicle load is relatively large and it will enter the constant - power state. Therefore, with the power unchanged, since the pressure is fixed, the displacement needs to be reduced. However, when the driver starts the one - key Boost, when the set power of this gear instantly rises to the power target value, to meet the power target value, the displacement needs to be increased, thereby increasing the flow rate, making the overall vehicle operation faster, and thus providing surging power.

[0037] When the one - key Boost is started, instantaneous speed loading can be achieved, as follows: The excavator is set with a fixed speed, that is, the speed of each gear is fixed after the gear is set. Obtain the set speed according to the current gear information. When the driver operates the slewing handle and starts the one - key boost at the same time, the set speed of this vehicle in this gear is instantly increased to a specific speed value. The increase value of the set speed instantly rising to the specific speed value is pre - calibrated according to different working conditions and the excavator operation site. According to the formula power = pressure * speed * displacement, in the normal mode, when loading operations are carried out, slewing will be accompanied by the boom lifting action. At this time, the overall vehicle load is relatively large and it will enter the constant - power state. Therefore, with the power unchanged, since the pressure is fixed, the displacement needs to be reduced. When the driver starts the one - key Boost, the set speed of this gear increases. Also, according to the formula flow rate = speed × displacement, under the condition that the displacement remains unchanged, when the set speed instantly rises to the specific speed value, the flow rate increases, making the overall vehicle operation faster, and thus providing surging power.

[0038] Embodiment Two

[0039] In this embodiment, a one-key Boost acceleration function control system for an excavator is provided, including the following modules:

[0040] An instantaneous current loading module, configured to: start one-key boost while operating the slewing handle, generate a pilot pressure, and instantaneously increase the pilot pressure from zero to the target value, and push the slewing spool of the main valve to the maximum position, so that the current instantaneously increases from the initial value to the target value;

[0041] A power instantaneous loading module, configured to: obtain the current gear information of the excavator, obtain the set power according to the current gear information, and after starting one-key boost, instantaneously increase the set power to the power target value and increase the flow rate;

[0042] A rotational speed instantaneous loading module, configured to: obtain the set rotational speed according to the current gear information, and after starting one-key boost, instantaneously increase the set rotational speed to the rotational speed specific value, thereby increasing the flow rate.

[0043] For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A one-button Boost acceleration function control method for an excavator, characterized in that: include: Operate the rotary handle and start the one-button boost at the same time to generate pilot pressure, which instantly rises from zero to the target value, and pushes the rotary spool of the main valve to the maximum position, so that the current is instantly loaded from the initial value to the target value; The current gear information of the excavator is obtained, and the set power is obtained according to the current gear information. After starting the one-key boost, the set power is instantly increased to the power target value, and the flow rate is increased; The set speed is obtained according to the current gear information, and after the one-key boost is started, the set speed is instantly increased to a specific speed value, thereby increasing the flow rate.

2. The one-key Boost acceleration function control method for an excavator as claimed in claim 1, characterized in that: The one-key boost action time is preset, and it stops automatically after the one-key boost action time is exceeded. The hydraulic oil temperature is monitored during the action time. When the hydraulic oil temperature exceeds the preset temperature, heat dissipation is increased.

3. The one-key Boost acceleration function control method for an excavator as claimed in claim 1, characterized in that: After operating the rotary handle, a rotary overflow pressure is generated; after starting the one-button boost, the rotary overflow pressure increases. According to the proportional relationship between the rotary torque and the rotary overflow pressure, the rotary torque increases with the increase of the rotary overflow pressure, thereby realizing instantaneous loading of the rotary torque.

4. The one-key Boost acceleration function control method for an excavator as claimed in claim 1, characterized in that: According to power = pressure × speed × displacement, under the condition that pressure and speed remain unchanged, when the set power instantly rises to the power target value, in order to meet the power target value, the displacement needs to be increased, thereby increasing the flow rate.

5. The one-key Boost acceleration function control method for an excavator as claimed in claim 1, characterized in that: According to flow rate = speed × displacement, under the condition that the displacement remains unchanged, when the set speed instantly rises to a specific speed value, the flow rate increases.

6. The one-key Boost acceleration function control method for an excavator as claimed in claim 1, characterized in that: The increase value of the set power rising instantly to the power target value is pre-calibrated according to different working conditions and excavator operation sites.

7. The one-key Boost acceleration function control method for an excavator as claimed in claim 1, characterized in that: The increase value when the set speed is instantly increased to the specific speed value is pre-calibrated according to different working conditions and excavator operation sites.

8. An excavator one-button Boost acceleration function control system, characterized in that: Includes the following modules: The current instantaneous loading module is configured as follows: operating the rotary handle and starting the one-button boost at the same time, generating a pilot pressure, and the pilot pressure rises from zero to a target value instantly, and pushes the rotary valve core of the main valve to the maximum position, so that the current is instantly loaded from the initial value to the target value; The power instantaneous loading module is configured to: obtain the current gear information of the excavator, obtain the set power according to the current gear information, and after starting the one-key boost, instantly increase the set power to the power target value and increase the flow rate; The speed instantaneous loading module is configured to obtain a set speed according to the current gear information, and after starting the one-key boost, instantly increase the set speed to a specific speed value, thereby increasing the flow rate.

9. A computer-readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, the steps in the one-key Boost acceleration function control method for an excavator as described in any one of claims 1 to 7 are implemented.

10. An electronic device comprising a memory, a processor, and a program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps in the one-key Boost acceleration function control method of an excavator as described in any one of claims 1-7 are implemented.

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