Operation regeneration method and device, engineering machinery and storage medium

Abstract

The invention relates to the technical field of engineering machinery, and discloses an operation regeneration method and device, engineering machinery and a storage medium. The method comprises the steps that when operation regeneration is executed, whether the regeneration target rotating speed is larger than the current engine rotating speed or not is judged; when the regeneration target rotating speed is larger than the current engine rotating speed, the current maximum flow of the hydraulic system is determined according to the current engine rotating speed; determining the maximum threshold current corresponding to the maximum opening degree of the operation handle according to the current maximum flow; and the rotating speed of an engine is controlled to rise to the regeneration target rotating speed, the opening degree of a hydraulic valve in the hydraulic system is controlled according to the maximum threshold current, and the hydraulic valve is used for controlling the operation speed. In the process that the rotating speed of the engine rises to the regeneration target rotating speed, the effect that the stable operation rotating speed is not changed is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to an operation regeneration method, a device, an engineering machinery and a storage medium. Background Art

[0002] Regeneration is a key link in the diesel engine emission system. When the particulate filter in the vehicle's exhaust system faces excessive load, that is, when too much soot accumulates and cannot be purified by itself through combustion, the driver needs to intervene through regeneration to burn the carbon deposits in the particulate filter. Currently, the commonly used regeneration methods include parking regeneration and operating regeneration. Parking regeneration to burn carbon deposits requires the construction machinery to stop working and trigger the parking regeneration button to start the 30-50 minute regeneration process when getting off the vehicle. Parking regeneration has the problem of delaying the construction period and consuming fuel. Operating regeneration to burn carbon deposits is to regenerate during the operation of the construction machinery without the need for the construction machinery to stop working. Since construction machinery often consists of two parts, the getting on and getting off, the getting off is only responsible for the driving of the vehicle, while the getting on is responsible for the operation of engineering equipment such as lifting and excavation. With the execution of the operation regeneration means, the engine is often required to increase the speed and exhaust temperature to burn carbon deposits. Because the getting on and getting off share the same engine, the operation of the getting on also relies on the engine drive, so the increase in engine speed will cause the operating speed of the getting on to change, and the operating speed of the getting on often has strict requirements. If the operating speed of the getting on is unstable during the operation, it will have a serious impact on the driver's operating feel, resulting in a mismatch between the operating speed and the requirements, and more seriously, it may lead to safety problems. Summary of the invention

[0003] In view of this, the present invention provides an operation regeneration method, device, engineering machinery and storage medium to solve the problem of operation regeneration causing changes in the vehicle operation speed.

[0004] In a first aspect, the present invention provides a method for regenerating an operation, the method comprising: when performing operation regeneration, determining whether a regeneration target speed is greater than a current engine speed, the regeneration target speed indicating the minimum speed required for the engine when performing operation regeneration, and the current engine speed indicating the actual speed of the engine when the vehicle performs the current operation; when the regeneration target speed is greater than the current engine speed, determining a current maximum flow of the hydraulic system according to the current engine speed; determining a maximum threshold current corresponding to the maximum opening of the operation handle according to the current maximum flow; controlling the engine speed to rise to the regeneration target speed, and controlling the opening of the hydraulic valve in the hydraulic system according to the maximum threshold current, the hydraulic valve being used to control the operation speed.

[0005] In some optional embodiments, determining the maximum threshold current of the operating handle at the maximum opening according to the current maximum flow rate includes: obtaining a mapping relationship between the current maximum flow rate and the maximum threshold current; substituting the current maximum flow rate into the mapping relationship to obtain the maximum threshold current.

[0006] In some optional embodiments, obtaining the mapping relationship between the current maximum flow and the maximum threshold current includes: determining the maximum control current actually corresponding to different engine speeds when the operating handle is at the maximum opening; determining the maximum output flow corresponding to the hydraulic system under different engine speed conditions; according to the same engine speed, the maximum output flow and the maximum control current are matched one by one to create the mapping relationship; wherein the current maximum flow is used to represent the variable value of the maximum output flow, and the maximum threshold current is used to represent the variable value of the maximum control current.

[0007] In some optional embodiments, when performing the operational regeneration, before determining whether the regeneration target speed is greater than the current engine speed, it also includes: obtaining the real-time carbon load in the particulate filter; when the real-time carbon load is less than a preset carbon load threshold, not entering the operational regeneration; when the real-time carbon load is greater than or equal to the preset carbon load threshold, entering the operational regeneration, and executing the step of determining whether the regeneration target speed is less than the current engine speed.

[0008] In some optional embodiments, before controlling the opening of the hydraulic valve in the hydraulic system according to the maximum threshold current, it also includes: determining whether the current operation is a combined action of the engineering machinery equipment; if it is a combined action, abandoning the operation regeneration; if it is not a combined action, continuing the operation regeneration.

[0009] In some optional embodiments, before controlling the opening of the hydraulic valve in the hydraulic system according to the maximum threshold current, it also includes: determining the pressure difference between the main pressure value output by the hydraulic system and the feedback pressure value detected by the sensor; judging whether the pressure difference is greater than a preset pressure threshold; if it is greater than the preset pressure threshold, continuing the operation regeneration; if it is less than or equal to the preset pressure threshold, abandoning the operation regeneration.

[0010] In some optional embodiments, the method further includes: when the regeneration target speed is less than or equal to the current engine speed, maintaining the current engine speed for operational regeneration.

[0011] In a second aspect, the present invention provides a working regeneration device, the device comprising: a speed detection module, for determining whether a regeneration target speed is greater than a current engine speed when performing working regeneration, the regeneration target speed indicating the minimum speed required for the engine when performing working regeneration, and the current engine speed indicating the actual speed of the engine when the vehicle performs the current working operation; a current maximum flow determination module, for determining a current maximum flow of the hydraulic system according to the current engine speed when the regeneration target speed is greater than the current engine speed; a handle current limiting module, for determining a maximum threshold current corresponding to the working handle at the maximum opening according to the current maximum flow; and an working speed stabilization module, for controlling the engine speed to rise to the regeneration target speed, and controlling the opening of a hydraulic valve in the hydraulic system according to the maximum threshold current, the hydraulic valve being used to control the working speed.

[0012] In a third aspect, the present invention provides an engineering machinery comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, computer instructions are stored in the memory, and the processor executes any one of the methods described in the first aspect by executing the computer instructions.

[0013] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, wherein the computer instructions are used to enable a computer to execute any of the methods described in the first aspect.

[0014] The technical solution provided by the present invention has the following advantages:

[0015] When the present invention is performing regeneration, if it is determined that the regeneration target speed is greater than the current engine speed, the engine speed needs to be increased, thereby increasing the exhaust temperature and burning carbon deposits. In order to ensure that the operating speed of the engineering machinery equipment remains unchanged, the current maximum flow required by the hydraulic system to maintain the vehicle operating speed unchanged is first determined based on the current engine speed, and then the maximum threshold current corresponding to the operating handle at the maximum opening when the current maximum flow is output is determined based on the relationship between the hydraulic flow and the handle current under normal working conditions. Then, the current of the operating handle to the maximum opening is fixed to the maximum threshold current, and it is not allowed to continue to increase, so that in the process of controlling the engine speed to rise to the regeneration target speed, the maximum current output by the handle to the hydraulic valve can only be the maximum threshold current, and the hydraulic oil flow that affects the output of the hydraulic system can only reach the current maximum flow, thereby achieving the effect of stabilizing the operating speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a flow chart of a job regeneration method according to an embodiment of the present invention;

[0018] Figure 2 is another flow chart of a job regeneration method according to an embodiment of the present invention;

[0019] Figure 3 is a schematic structural diagram of a job regeneration device according to an embodiment of the present invention;

[0020] Figure 4 is a structural block diagram of an engineering machinery according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0022] According to an embodiment of the present invention, an embodiment of a job regeneration method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0023] In this embodiment, a method for regenerating a job is provided. Figure 1 is a flow chart of a job regeneration method according to an embodiment of the present invention. Figure 1 As shown, the process includes the following steps:

[0024] Step S101, when performing a regeneration operation, determining whether a regeneration target speed is greater than a current engine speed, the regeneration target speed indicating the minimum speed required for the engine when performing a regeneration operation, and the current engine speed indicating the actual engine speed when the vehicle performs the current operation;

[0025] Step S102, when the regeneration target speed is greater than the current engine speed, determining the current maximum flow of the hydraulic system according to the current engine speed;

[0026] Step S103, determining the maximum threshold current corresponding to the maximum opening of the operating handle according to the current maximum flow rate;

[0027] Step S104, controlling the engine speed to increase to the regeneration target speed, and controlling the opening of the hydraulic valve in the hydraulic system according to the maximum threshold current, the hydraulic valve being used to control the working speed.

[0028] Specifically, when performing operation regeneration, the embodiment of the present invention first needs to determine whether the regeneration target speed is greater than the current engine speed. The regeneration target speed represents the minimum speed required for the engine when performing operation regeneration. For example, the engine must reach 900rpm to make the engine exhaust temperature reach 600°C to achieve the effect of operation regeneration. The current engine speed represents the actual engine speed when the vehicle performs the current operation. For example, if the construction machinery is a crane, and the vehicle is performing the operation of lifting heavy objects at a uniform speed, in order to maintain the stability of the movement speed of the boom, it is necessary to ensure that the actual engine speed is stable, thereby obtaining the current engine speed.

[0029] If the regeneration target speed is less than or equal to the current engine speed, it means that the engine is running at the current engine speed, and the temperature provided is sufficient to burn carbon deposits in the regeneration process, so there is no need to continue to increase the engine speed. Therefore, the current engine speed can be maintained for regeneration.

[0030] If the regeneration target speed is greater than the current engine speed, it means that the temperature provided by the engine running at the current engine speed cannot burn the carbon deposits, and the engine speed needs to be further increased to make the engine speed reach the regeneration target speed in order to normally burn the carbon deposits and perform the regeneration process. For example, if the current engine speed cannot make the engine exhaust temperature reach 600℃, the engine speed needs to be further increased to make the engine exhaust temperature reach 600℃.

[0031] Based on this, in order not to affect the operating speed of equipment such as the boom during the increase in engine speed, it is necessary to ensure that the flow of the hydraulic system remains stable and cannot be affected by the increase in engine speed. This is because the hydraulic system is a hardware system that directly affects the operating speed of equipment such as the boom. Since the flow of the hydraulic system is affected by the opening of the hydraulic valve in the hydraulic system, the hydraulic flow is related to the handle current used to control the hydraulic valve, where the handle current refers to the current output by the handle in the cab to operate the boom and other equipment. The actual characteristics of the vehicle determine that the increase in engine speed will inevitably lead to an increase in the output current corresponding to the maximum opening of the handle, so the present invention converts the problem of operating speed control on the vehicle into a current control problem when the handle is at its maximum opening.

[0032] Based on this, the embodiment of the present invention can first calculate the current maximum flow of the hydraulic system according to the current engine speed of the engine, wherein the current maximum flow refers to the maximum hydraulic oil flow of the hydraulic system under the current working conditions. The specific calculation method can be: obtain the oil pump displacement, and then calculate the maximum flow of the hydraulic system corresponding to the current engine speed of the engine in combination with the power take-off speed ratio method, that is, the current maximum flow.

[0033] Then, under the condition that the actual output flow of the hydraulic system does not exceed the current maximum flow, the maximum control current of the handle corresponding to the current maximum flow is determined through experiments, calculations or calibration methods. The maximum control current refers to the output current when the handle is opened to the maximum. The determined maximum control current of the handle is the maximum threshold current. As long as the output current when the handle is opened to the maximum does not exceed the maximum threshold current, it can ensure that the flow of the hydraulic system does not increase, thereby preventing the operating speed from increasing and maintaining the stability of the operating speed.

[0034] Therefore, even if the actual characteristics of the vehicle determine that the increase in engine speed will inevitably lead to an increase in the output current corresponding to the maximum opening of the handle, the embodiment of the present invention can also force the output current corresponding to the maximum opening of the handle to be the aforementioned maximum threshold current, while forcing the output current when the handle is at its maximum opening to not increase, thereby maintaining the opening of the hydraulic valve stable, to ensure that the output flow of the hydraulic system will not increase during the process of the engine speed rising to the regeneration target speed, thereby achieving the effect of stabilizing the operating speed. The technical solution provided by the embodiment of the present invention solves the problem of operating speed changes caused by the increase in engine speed during regeneration.

[0035] In some optional implementations, step S103 includes:

[0036] Step a1, obtaining a mapping relationship between the current maximum flow rate and the maximum threshold current;

[0037] Step a2, bringing the current maximum flow into the mapping relationship to obtain the maximum threshold current.

[0038] Specifically, when the embodiment of the present invention determines the maximum threshold current corresponding to the current maximum flow, the mapping relationship between the current maximum flow and the maximum threshold current is calculated in advance. Therefore, when any maximum flow of the hydraulic system is determined, the maximum threshold current that will not affect the operating speed can be quickly queried through the mapping relationship to limit the maximum opening current of the handle, thereby improving the operating regeneration control speed, reducing the response time of the computer, and ensuring that the operating speed is continuously stable.

[0039] In an optional implementation, the mapping relationship is obtained in the following manner:

[0040] 1. Determine the maximum control current actually corresponding to different engine speeds when the operating handle is at the maximum opening;

[0041] 2. Determine the maximum output flow of the hydraulic system under different engine speed conditions;

[0042] 3. Based on the same engine speed, the maximum output flow and the maximum control current are matched one by one to create a mapping relationship.

[0043] Specifically, the embodiment of the present invention first determines the maximum control current corresponding to each speed through experimental testing for the engine speed variation range of the regeneration operation. For example, the engine speed variation range is 700-900rpm, and then through experiments, the handle is opened to the maximum at each speed, and then the reading is determined to determine the maximum control current Imax corresponding to the maximum handle opening at each speed.

[0044] In the second step, the embodiment of the present invention calculates the maximum output flow Qmax of the hydraulic system corresponding to each speed value of the engine in the range of 700 to 900 rpm based on the oil pump displacement (for example, dual pumps 85cc+85cc) combined with the power take-off speed ratio method (the power take-off speed ratio calculation method is a prior art and will not be repeated in this embodiment).

[0045] Through the processing of the first and second steps above, the maximum control current corresponding to each speed value is obtained, and the maximum output flow corresponding to each speed value is also obtained. In the third step, combined with the main valve bench test data, each maximum output flow is first corresponded to the engine speed value, that is, each maximum output flow has a corresponding speed value in the range of 700-900rpm, and then at the same speed, each speed corresponds to the maximum control current Imax, so different maximum control currents and different maximum output flows have a one-to-one correspondence, so that all maximum control currents are connected into a line, and a function curve with the maximum output flow as the horizontal axis and the maximum control current as the vertical axis is obtained through linear fitting, thereby obtaining the above mapping relationship. In practical applications, when the current maximum flow is determined, the target maximum output flow that is consistent with the current maximum flow value is first searched from the mapping relationship, and then the target maximum control current corresponding to the target maximum output flow is determined according to the mapping relationship, and then the target maximum control current is used as the maximum threshold current, which improves the accuracy of querying the maximum threshold current according to the current maximum flow.

[0046] In some optional implementations, before the above step S101, the following steps are further included:

[0047] Step b1, obtaining the real-time carbon load in the particulate filter;

[0048] Step b2: when the real-time carbon load is less than the preset carbon load threshold, the regeneration operation is not started;

[0049] Step b3, when the real-time carbon load is greater than or equal to the preset carbon load threshold, enter the operation regeneration, and execute the step of determining whether the regeneration target speed is less than the current engine speed.

[0050] Specifically, before the operation regeneration is performed, the embodiment of the present invention needs to detect the real-time carbon load in the particulate filter. If the real-time carbon load is less than the preset carbon load threshold, such as 4g / L, it means that the carbon deposition is not serious and does not need to be cleaned, so the operation regeneration is not performed and the operation can be continued. If the real-time carbon load is greater than or equal to the preset carbon load threshold, it means that the carbon deposition is serious, and the engine sends a job regeneration request to the whole vehicle, and then enters the operation regeneration link, and the whole vehicle executes step S101. Through the technical solution provided by the embodiment of the present invention, the start time of the operation regeneration is clarified, and the energy consumption of the vehicle is reduced.

[0051] In some optional implementations, the job regeneration method provided in the embodiment of the present invention, before the above step S104, further includes:

[0052] Step c1, determining whether the current operation is a combined action of engineering machinery equipment;

[0053] Step c2, if it is a combined action, then abandon the job regeneration;

[0054] Step c3: If it is not a combined action, continue the operation regeneration.

[0055] Specifically, Figure 2 As shown, the embodiment of the present invention also detects in real time during regeneration whether the operation action of the engineering machinery is a combined action, wherein the combined action refers to a non-single operation action, and a single operation action refers to a single action such as lifting, lowering, and turning, while the combined action is a combination of multiple single actions under specific requirements and performed simultaneously. Since the combined action is relatively complex, the accuracy of the hydraulic oil flow rate is required to be high, and a slight deviation may cause the action to fail and may also cause safety problems. Although the operation speed is limited by the aforementioned steps S102 to S104, there may also be a risk of control failure. Therefore, this embodiment abandons the operation regeneration under the condition of the combined action to further improve the safety and reliability of the engineering machinery operation.

[0056] In some optional implementations, the job regeneration method provided in the embodiment of the present invention, before the above step S104, further includes:

[0057] Step d1, determining the pressure difference between the main pressure value output by the hydraulic system and the feedback pressure value detected by the sensor;

[0058] Step d2, determining whether the pressure difference is greater than a preset pressure threshold;

[0059] Step d3, if it is greater than the preset pressure threshold, continue the regeneration operation;

[0060] Step d4: If the pressure is less than or equal to the preset pressure threshold, the regeneration operation is abandoned.

[0061] Specifically, Figure 2 As shown, the embodiment of the present invention further determines whether the operation regeneration can solve the performance problem of the engineering machinery through the reliability of the hydraulic system, thereby determining whether the operation regeneration needs to be abandoned.

[0062] Specifically, it is necessary to obtain the main pressure value output by the hydraulic system and the feedback pressure value detected by the sensor, and then calculate the pressure difference between the two. When the operating condition is single action and the pressure difference is greater than the preset pressure threshold (for example, the preset pressure threshold is 2.5Mpa, which is the minimum difference to ensure that the engineering machinery can operate normally), the controller receives the operation regeneration request, and the engine speed needs to be increased to the regeneration target speed for operation regeneration. When the engine detects that the carbon load in the particulate filter is 0, the operation regeneration is completed, and the engine resumes the operating speed or idle speed. During the operation regeneration, the hydraulic valve controls the operating speed to remain unchanged. When the operating condition is single action and the pressure difference is less than or equal to the preset pressure threshold, it means that there is a problem with the hydraulic system. Even if the operation regeneration is completed, the operation stability of the engineering machinery cannot be improved. Therefore, the controller sends a prohibition regeneration request to the engine controller to continue to maintain the current operating state and always keep the operating speed unchanged. On the one hand, it avoids the introduction of other negative effects during the operation regeneration process, and on the other hand, it reduces unnecessary energy consumption caused by regeneration.

[0063] In some optional embodiments, for the working condition of increasing the engine speed, the rate of increase of the current engine speed to the regeneration target speed can also be evaluated. For example, the rate can be set to 30r / s, 50r / s, 60r / s, 80r / s, etc., and then the parameters such as carbon burning time and regeneration fuel consumption are tested. The most suitable rate of increase is selected according to the test results to quickly and stably increase the engine exhaust temperature to 600°C to burn the carbon deposits. Similarly, for the working condition of increasing the engine speed, the engine speed needs to be restored to the current engine speed after the regeneration operation is completed. Considering the fuel consumption and the allowable fluctuation range of the operating speed, the decrease rate can be set to 30r / s, 50r / s, 60r / s, 80r / s, etc., and the operating speed decrease rate can be calibrated. The most suitable decrease rate is selected to reduce the engine speed, so as to improve the efficiency of burning carbon deposits, reduce the regeneration fuel consumption, and reduce the fluctuation range of the operating speed.

[0064] In this embodiment, a job regeneration device is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0065] This embodiment provides a job regeneration device, such as Figure 3 As shown, including:

[0066] The speed detection module 301 is used to determine whether the regeneration target speed is greater than the current engine speed when performing the regeneration operation. The regeneration target speed indicates the minimum speed required for the engine when performing the regeneration operation, and the current engine speed indicates the actual speed of the engine when the vehicle performs the current operation;

[0067] A current maximum flow determination module 302, for determining a current maximum flow of the hydraulic system according to the current engine speed when the regeneration target speed is greater than the current engine speed;

[0068] The handle current limiting module 303 is used to determine the maximum threshold current corresponding to the maximum opening of the operating handle according to the current maximum flow rate;

[0069] The operating speed stabilization module 304 is used to control the engine speed to increase to the regeneration target speed, and control the opening of the hydraulic valve in the hydraulic system according to the maximum threshold current, and the hydraulic valve is used to control the operating speed.

[0070] In some optional implementations, the handle current limiting module 303 includes:

[0071] A mapping relationship acquisition unit, used to acquire a mapping relationship between a current maximum flow rate and a maximum threshold current;

[0072] The query unit is used to bring the current maximum flow into the mapping relationship to obtain the maximum threshold current.

[0073] In some optional implementations, the mapping relationship acquisition unit includes:

[0074] A test subunit is used to determine the maximum control current actually corresponding to different engine speeds when the operating handle is at the maximum opening;

[0075] A calculation subunit, used to determine the maximum output flow of the hydraulic system corresponding to different engine speed conditions;

[0076] The mapping subunit is used to create a mapping relationship by making a one-to-one correspondence between the maximum output flow and the maximum control current according to the same engine speed.

[0077] In some optional embodiments, the device further comprises:

[0078] A carbon load detection module, used to obtain the real-time carbon load in the particulate filter;

[0079] The first judgment module is used for not entering the operation regeneration when the real-time carbon load is less than the preset carbon load threshold;

[0080] The second judgment module is used to enter the operation regeneration when the real-time carbon load is greater than or equal to the preset carbon load threshold, and execute the step of judging whether the regeneration target speed is less than the current engine speed.

[0081] In some optional implementations, before the operation speed stabilization module 304, the following further includes:

[0082] A combined action judgment module is used to judge whether the current operation is a combined action of engineering machinery equipment;

[0083] Abandon module, used to abandon the job regeneration if it is a combined action;

[0084] The continue module is used to continue the job regeneration if it is not a combined action.

[0085] In some optional implementations, before the operation speed stabilization module 304, the following further includes:

[0086] A pressure difference calculation module, used to determine the pressure difference between the main pressure value output by the hydraulic system and the feedback pressure value detected by the sensor;

[0087] A pressure difference analysis module is used to determine whether the pressure difference is greater than a preset pressure threshold;

[0088] A continuing module is used to continue the regeneration operation if the pressure is greater than a preset pressure threshold;

[0089] The abandonment module is used to abandon the regeneration operation if the pressure is less than or equal to a preset pressure threshold.

[0090] In some optional embodiments, the device further comprises:

[0091] The direct regeneration module is used to maintain the current engine speed for operation regeneration when the regeneration target speed is less than or equal to the current engine speed.

[0092] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0093] The embodiment of the present invention also provides an engineering machine having the above Figure 3 The job regeneration device shown.

[0094] See also Figure 4 , Figure 4 is a structural schematic diagram of an engineering machinery provided by an optional embodiment of the present invention, such as Figure 4 As shown, the engineering machinery includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses for communication, and can be installed on a common motherboard or installed in other ways as needed. The processor can process instructions executed in the engineering machinery, including instructions stored in or on the memory to display graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple engineering machinery can be connected, and each device provides part of the necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 4 A processor 10 is taken as an example.

[0095] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0096] The memory 20 stores instructions executable by at least one processor 10, so that at least one processor 10 executes the method shown in the above embodiment.

[0097] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required by at least one function; the data storage area may store data created according to the use of the engineering machinery, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the engineering machinery via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0098] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0099] The engineering machine further comprises a communication interface 30 for the engineering machine to communicate with other devices or a communication network.

[0100] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0101] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0102] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for regenerating an operation, characterized in that: The method comprises: When performing work regeneration, determining whether the regeneration target speed is greater than the current engine speed, the regeneration target speed indicating the minimum speed required for the engine when performing work regeneration, and the current engine speed indicating the actual speed of the engine when the vehicle performs the current work; When the regeneration target speed is greater than the current engine speed, determining a current maximum flow rate of the hydraulic system according to the current engine speed; Determine the maximum threshold current corresponding to the maximum opening of the operating handle according to the current maximum flow rate; The engine speed is controlled to increase to the regeneration target speed, and the opening of the hydraulic valve in the hydraulic system is controlled according to the maximum threshold current, wherein the hydraulic valve is used to control the working speed.

2. The method according to claim 1, characterized in that The step of determining the maximum threshold current of the operating handle at the maximum opening according to the current maximum flow rate includes: Acquire a mapping relationship between the current maximum flow rate and the maximum threshold current; The current maximum flow rate is brought into the mapping relationship to obtain the maximum threshold current.

3. The method according to claim 2, characterized in that The obtaining of a mapping relationship between the current maximum flow rate and the maximum threshold current includes: Determine the maximum control current actually corresponding to different engine speeds when the operating handle is at the maximum opening; Determine the maximum output flow of the hydraulic system under different engine speed conditions; According to the same engine speed, the maximum output flow rate and the maximum control current are matched one by one to create the mapping relationship.

4. The method according to claim 1, characterized in that When performing the regeneration operation, before determining whether the regeneration target speed is greater than the current engine speed, the method further includes: Get real-time carbon loading in the particulate filter; When the real-time carbon load is less than the preset carbon load threshold, the operation regeneration is not started; When the real-time carbon load is greater than or equal to the preset carbon load threshold, the operation regeneration is entered, and the step of determining whether the regeneration target speed is less than the current engine speed is executed.

5. The method according to claim 1, characterized in that Before controlling the opening of the hydraulic valve in the hydraulic system according to the maximum threshold current, the method further includes: Determine whether the current operation is a combined action of engineering machinery and equipment; If it is a combined action, the job regeneration is abandoned; If it is not a combined action, continue the operation regeneration.

6. The method according to claim 1 or 5, characterized in that: Before controlling the opening of the hydraulic valve in the hydraulic system according to the maximum threshold current, the method further includes: Determine the pressure difference between the main pressure value output by the hydraulic system and the feedback pressure value detected by the sensor; Determining whether the pressure difference is greater than a preset pressure threshold; If it is greater than the preset pressure threshold, continue the regeneration operation; If it is less than or equal to the preset pressure threshold, the regeneration operation is abandoned.

7. The method according to claim 1, characterized in that The method further comprises: When the regeneration target speed is less than or equal to the current engine speed, the current engine speed is maintained to perform work regeneration.

8. A work regeneration device, characterized in that: The device comprises: A speed detection module, used to determine whether a regeneration target speed is greater than a current engine speed when performing a regeneration operation, wherein the regeneration target speed indicates the minimum speed required for the engine when performing a regeneration operation, and the current engine speed indicates the actual speed of the engine when the vehicle performs the current operation; a current maximum flow determination module, configured to determine a current maximum flow of the hydraulic system according to the current engine speed when the regeneration target speed is greater than the current engine speed; A handle current limiting module, used to determine the maximum threshold current corresponding to the maximum opening of the operating handle according to the current maximum flow rate; The operating speed stabilization module is used to control the engine speed to increase to the regeneration target speed, and control the opening of the hydraulic valve in the hydraulic system according to the maximum threshold current, wherein the hydraulic valve is used to control the operating speed.

9. An engineering machine, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method according to any one of claims 1 to 7.

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