Control method and device for regeneration of after-treatment system, controller and engineering machinery

Abstract

The invention provides an aftertreatment system regeneration control method and device, a controller and engineering machinery. The method comprises the steps that when an automatic regeneration signal of the aftertreatment system is detected, the oil injection displacement of a pump is increased to a preset first displacement from an initial value and lasts for a preset first duration; obtaining a post-processing temperature at the end of the first duration; if the post-processing temperature is smaller than a preset first temperature threshold value, the rotating speed of the engine is increased to a preset first target rotating speed; the engine is controlled to operate at the first target rotating speed till the new aftertreatment temperature is larger than the first temperature threshold value; and regeneration is carried out at the temperature larger than the first temperature threshold value, and when the regeneration quit condition is met, the first displacement is reduced to the initial value, and the first target rotating speed is reduced to the actually-needed rotating speed. By means of the mode, user operation is not needed, and the user can regenerate in a non-inductive experience mode. Through a mode of firstly increasing the displacement and then increasing the rotating speed, the abnormal experience degree is reduced as much as possible, and the non-inductive degree is improved.

Description

Technical Field

[0001] The present application relates to the field of engineering machinery, and in particular to a control method, device, controller and engineering machinery for regeneration of a post-processing system. Background Art

[0002] With the need for environmental protection and the requirements of non-road engine emission regulations, the engines of non-road engineering machinery need to add after-treatment systems to meet the requirements of emission regulations. If the after-treatment system of engineering machinery is running for a long time, there will be excessive accumulation of PM and excessive exhaust back pressure. Therefore, the after-treatment system needs to be regenerated regularly before it can continue to be used.

[0003] In actual engineering machinery applications using DPF aftertreatment systems, the DPF will periodically trigger automatic regeneration during daily engine operation. When the engine has a need for automatic regeneration and needs to be heated up (water temperature / temperature before and after DOC), the engine is required to run continuously at a high load to ensure normal heating and complete automatic regeneration. However, due to users' lack of understanding of aftertreatment regeneration and actual operating conditions, when the engine needs to regenerate and heat up, the engine idles for a long time or even shuts down directly, resulting in the inability to complete heating, which in turn causes the engine to be unable to complete automatic regeneration normally, resulting in a jam alarm and torque limit, and a shutdown failure.

[0004] Therefore, how to achieve automatic regeneration without user operation is an urgent problem to be solved. Summary of the invention

[0005] The present application provides a control method, device, controller and engineering machinery for regeneration of a post-processing system, so as to achieve an automatic regeneration effect without any operation by the user.

[0006] In a first aspect, the present application provides a control method for regeneration of an aftertreatment system, the method comprising:

[0007] When the vehicle is in idle mode and an automatic regeneration signal of the after-treatment system is detected, the fuel injection displacement of the pump is increased from an initial value to a preset first displacement and lasts for a preset first time period;

[0008] Get the post-processing temperature at the end of the first time period;

[0009] If the post-processing temperature is less than or equal to a preset first temperature threshold, increasing the engine speed to a preset first target speed;

[0010] controlling the engine to operate at the first target speed until a new aftertreatment temperature is greater than the first temperature threshold;

[0011] Regeneration is performed at a temperature greater than the first temperature threshold, and when a regeneration exit condition is reached, the first displacement is reduced to the initial value, and the first target speed is reduced to the actual required speed of the vehicle, and the regeneration exit condition includes the regeneration duration reaching a preset second duration, or detecting that the vehicle exits idle mode.

[0012] Optionally, the method further comprises: obtaining a coolant temperature of the engine;

[0013] Accordingly, controlling the engine to operate at the first target speed until a new aftertreatment temperature is greater than the first temperature threshold includes:

[0014] The engine is controlled to operate at the first target speed until a new aftertreatment temperature is greater than the first temperature threshold and the coolant temperature is greater than a preset second temperature threshold.

[0015] Optionally, when the automatic regeneration signal of the after-treatment system is detected, the fuel injection displacement of the pump is increased from an initial value to a preset first displacement and lasts for a preset first time period, including:

[0016] When the automatic regeneration signal is detected, no operation is performed within a preset third time period;

[0017] After the third time period ends, the fuel injection displacement of the pump is increased from the initial value to the first displacement and lasts for the first time period.

[0018] Optionally, controlling the engine to operate at the first target speed until a new aftertreatment temperature is greater than the first temperature threshold includes:

[0019] controlling the engine to run at the first target speed for a preset fourth time period, and if the first process post-processing temperature is still less than the first temperature threshold at the end of the fourth time period, increasing the injection displacement from the first displacement to a preset second displacement;

[0020] Continuing the second displacement for a preset fifth time period, and determining whether the second process post-processing temperature is greater than the first temperature threshold at the end of the fifth time period;

[0021] If the second process post-processing temperature is less than the first temperature threshold, increasing the engine speed from the first target speed to a preset second target speed;

[0022] The system is operated at the second displacement and the second target speed until a new aftertreatment temperature is greater than the first temperature threshold.

[0023] Optionally, the method further includes:

[0024] If the second process aftertreatment temperature is greater than the first temperature threshold, the system operates at the second displacement and the first target speed.

[0025] Optionally, it is detected that the displacement decreasing speed when the vehicle exits the idle mode is greater than the displacement decreasing speed when the regeneration duration reaches the second duration.

[0026] Optionally, it is detected that the rate of decrease of the engine speed when the vehicle exits the idle mode is greater than the rate of decrease of the engine speed when the regeneration duration reaches the second duration.

[0027] In a second aspect, the present application provides a control device for regeneration of a post-treatment system, the device comprising:

[0028] A displacement control module, for when the vehicle is in an idle mode, when an automatic regeneration signal of the after-treatment system is detected, increases the injection displacement of the pump from an initial value to a preset first displacement and continues for a preset first time period;

[0029] An acquisition module, used for acquiring a post-processing temperature at the end of a first time period;

[0030] a speed control module, configured to increase the engine speed to a preset first target speed if the post-processing temperature is less than or equal to a preset first temperature threshold;

[0031] a regeneration control module, configured to control the engine to operate at the first target speed until a new aftertreatment temperature is greater than the first temperature threshold;

[0032] A regeneration exit module is used to perform regeneration at a temperature greater than the first temperature threshold. When the regeneration exit condition is met, the first displacement is reduced to the initial value and the first target speed is reduced to the actual required speed of the vehicle. The regeneration exit condition includes the regeneration time reaching a preset second time, or detecting that the vehicle exits the idle mode.

[0033] In a third aspect, the present application further provides a controller, including: a memory, a processor;

[0034] The memory stores computer-executable instructions;

[0035] The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method as described in any one of the first aspects.

[0036] In a fourth aspect, the present application further provides an engineering machinery, comprising a controller, wherein the controller is used to execute the method as described in any one of the first aspects, or comprises a control device for regenerating the post-treatment system as described in the second aspect.

[0037] In a fifth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the above first aspect and / or various possible implementations of the first aspect.

[0038] In a sixth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the above first aspect and / or various possible implementations of the first aspect.

[0039] The present application provides a control method, device, controller and engineering machinery for the regeneration of the post-processing system, the method comprising: when the vehicle is in idle mode, when the automatic regeneration signal of the post-processing system is detected, the injection displacement of the pump is increased from the initial value to the preset first displacement, and the first duration is preset; the post-processing temperature at the end of the first duration is obtained; if the post-processing temperature is less than the preset first temperature threshold, the engine speed is increased to the preset first target speed; the engine is controlled to run at the first target speed until the new post-processing temperature is greater than the first temperature threshold; regeneration is performed at a temperature greater than the first temperature threshold, and when the regeneration exit condition is reached, the first displacement is reduced to the initial value, and the first target speed is reduced to the actual required speed, and the regeneration exit condition includes the regeneration duration reaching the preset second duration, or the vehicle is detected to exit the idle mode. Through this method, the failure of post-processing automatic regeneration caused by improper user operation can be effectively avoided. The method used in the present application does not require user operation, so that the user has a non-sensing experience. Moreover, during the post-processing temperature rise process, if increasing the injection displacement of the pump fails to meet the temperature requirement, increasing the engine speed will make the user experience abnormal. Therefore, by increasing the displacement first, the degree of abnormal experience felt by the user can be reduced as much as possible, thereby increasing the degree of imperceptibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0041] Figure 1 The following is a flow chart of the control method for regeneration of the post-treatment system provided in this application. Figure 1 ;

[0042] Figure 2 A schematic diagram of the regeneration logic of the aftertreatment system provided for this application;

[0043] Figure 3 Another schematic diagram of the regeneration logic of the aftertreatment system provided by the present application;

[0044] Figure 4 A schematic diagram of the structure of the control device for regeneration of the post-treatment system provided in the present application;

[0045] Figure 5 A schematic diagram of the structure of the electronic device provided in this application.

[0046] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0047] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0048] First, the terms involved in this application are explained:

[0049] Diesel Particulate Filter (DPF) post-treatment system: refers to an environmental protection technology commonly used in modern engines to reduce solid particulate matter in emissions. These particulate matter are mainly carbon particles produced by incomplete combustion of diesel, which have a negative impact on air quality and human health.

[0050] The DPF captures solid particles (such as carbon black) in the exhaust gas through its filter element. These particles are stored in the filter, reducing the possibility of entering the atmosphere. As particulate matter accumulates, the DPF needs to be regenerated regularly to remove the captured particles.

[0051] This is usually done in two ways:

[0052] Passive regeneration: When the engine is running, the exhaust temperature is high enough to automatically burn off the accumulated particulate matter.

[0053] Active regeneration: When the exhaust temperature is not high enough for passive regeneration, the system burns the particulate matter in the filter by increasing the aftertreatment temperature.

[0054] In order to ensure that the DPF works effectively, the vehicle will be equipped with a monitoring system to detect the filter's blockage status, temperature and pressure in real time to ensure timely regeneration operations.

[0055] In actual engineering machinery applications using DPF post-treatment systems, during daily engine operation, the DPF will periodically trigger automatic regeneration, and normally working machines are basically based on time for automatic regeneration. When the engine has a need for automatic regeneration and needs to be heated up (water temperature / DOC front and rear temperatures), the engine is required to continue to run at a high load to ensure normal heating and complete automatic regeneration. However, due to users' lack of understanding of post-treatment regeneration and actual working conditions, when the engine needs to regenerate and heat up, the engine idles for a long time or even shuts down directly, resulting in the inability to complete heating, which in turn causes the engine to be unable to complete automatic regeneration normally, resulting in a jam alarm and torque limit, causing a shutdown failure.

[0056] In view of the above problems, in order to avoid regeneration failure caused by improper user operation, the present application proposes a control method for regeneration of the post-processing system, so that the user can complete the regeneration without feeling it. Specifically, when the user is idling waiting for loading or idling due to rest, automatic regeneration is performed. During the regeneration process, the engine speed is first controlled to remain unchanged and the engine load is increased, that is, the injection displacement is increased to increase the post-processing temperature. When the temperature does not reach the required temperature, the engine speed is increased to further increase the post-processing temperature for regeneration. When the displacement control does not reach the required temperature, the speed is controlled to be increased, which can reduce the user experience and increase the user's imperceptibility.

[0057] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0058] Figure 1 The following is a flow chart of the control method for regeneration of the post-treatment system provided in this application. Figure 1 ,like Figure 1 As shown, the method includes:

[0059] S101. The vehicle is in idle mode. When an automatic regeneration signal of the post-processing system is detected, the injection displacement of the pump is increased from an initial value to a preset first displacement and continued for a preset first time period.

[0060] In one implementation, when it is detected that the vehicle has been running in the idle mode for a preset time (which may be a cumulative time length), the automatic regeneration mode of the after-treatment system is triggered.

[0061] In one implementation, automatic regeneration is triggered every preset time.

[0062] When the signal of automatic regeneration is detected and the vehicle is in idle mode, regeneration is performed. First, the engine load is increased, and the injection displacement of the dual pump is increased from the initial value of idle speed to the preset first displacement, which is used to increase the exhaust temperature and promote the combustion of particulate matter in the DPF.

[0063] After increasing to the first displacement, the preset first time period is stabilized to increase the aftertreatment temperature to a stable temperature.

[0064] S102: Obtain the post-processing temperature at the end of the first time period.

[0065] At the end of the first time period, the aftertreatment temperature of the current aftertreatment system is obtained, wherein the aftertreatment temperature refers to the exhaust temperature measured by the temperature sensor set before the diesel oxidation catalyst (Diesel Oxidation Catalyst, referred to as: DOC). This is the key data for determining whether the appropriate regeneration temperature has been reached.

[0066] The DOC typically needs to be within a certain temperature range to work effectively (usually 200 degrees Celsius to 600 degrees Celsius). Monitoring the temperature before the DOC helps confirm that the exhaust temperature is high enough to ensure that the catalyst can work properly.

[0067] S103: If the post-processing temperature is less than or equal to a preset first temperature threshold, the engine speed is increased to a preset first target speed.

[0068] The first temperature threshold is the exhaust temperature set to complete post-processing regeneration. If the temperature still does not reach the first temperature threshold after the first time period has ended after increasing the displacement, it means that the increase in displacement has reached a bottleneck in the temperature increase. By increasing the engine speed, the engine speed is increased to the first target speed. Increasing the engine speed can increase the exhaust temperature and ensure that DPF regeneration can be performed effectively.

[0069] S104: Control the engine to run at a first target speed until a new post-processing temperature is greater than a first temperature threshold.

[0070] After the engine speed is increased to the first target speed, the system continues to monitor the temperature until the new aftertreatment temperature exceeds the first temperature threshold, at which point the temperature is high enough to begin the DPF regeneration process.

[0071] S105. Regeneration is performed at a temperature greater than a first temperature threshold. When a regeneration exit condition is reached, the first displacement is reduced to an initial value, and the first target speed is reduced to an actual required speed of the vehicle. The regeneration exit condition includes that the regeneration time reaches a preset second time, or the vehicle is detected to have exited idle mode.

[0072] When the post-treatment temperature is greater than the first temperature threshold, the engine will maintain a high speed to regenerate the DPF. During the regeneration process, the vehicle will continue to remove particulate matter from the DPF and ensure that the regeneration conditions meet the exit requirements. Regeneration will exit when any of the following conditions are met: 1. The regeneration time reaches the preset second time; 2. The user operates the vehicle and detects that the vehicle has exited idle mode.

[0073] Once the regeneration process is exited, the system will reduce the injection displacement and engine speed.

[0074] If the regeneration time reaches the preset second time, the regeneration is completed and the vehicle is still in idle mode, then the pump's injection displacement is reduced to the initial value and the engine speed is reduced to the actual required speed of the vehicle (i.e. the speed required for idle speed).

[0075] If the vehicle exits the idle mode during the regeneration process, the regeneration process is terminated. At this time, the pump's injection displacement is reduced to the initial value, the gear position information and the accelerator pedal opening are obtained, and the actual required speed is determined according to the gear position and the pedal opening. The engine speed is reduced from the first target speed to the actual required speed.

[0076] This embodiment provides a control method for regeneration of a post-processing system, the method comprising: when the vehicle is in idle mode, when the automatic regeneration signal of the post-processing system is detected, the injection displacement of the pump is increased from the initial value to the preset first displacement, and the first duration is preset; the post-processing temperature at the end of the first duration is obtained; if the post-processing temperature is less than the preset first temperature threshold, the engine speed is increased to the preset first target speed; the engine is controlled to run at the first target speed until the new post-processing temperature is greater than the first temperature threshold; regeneration is performed at a temperature greater than the first temperature threshold, and when the regeneration exit condition is reached, the first displacement is reduced to the initial value, and the first target speed is reduced to the idle speed, and the regeneration exit condition includes that the regeneration duration reaches the preset second duration, or the vehicle exits the idle mode. Through this method, the failure of post-processing automatic regeneration caused by improper user operation can be effectively avoided, and no user operation is required, so that the user has no sense of experience. And in the post-processing heating process, when the displacement is increased and the temperature requirement cannot be met, the engine speed is increased again, and the increase in the engine speed will make the user feel abnormal. Therefore, by first increasing the displacement, the abnormal experience of the user is minimized and the degree of insensitivity is improved.

[0077] Based on the above embodiment, the engine coolant temperature also needs to be considered. During the regeneration process, the control of the coolant temperature is very important. When the water temperature is lower than the threshold, the thermal efficiency and combustion efficiency of the engine may be insufficient, resulting in the exhaust temperature failing to meet the requirements during the regeneration process, thereby affecting the regeneration of the aftertreatment system (such as DPF). Too low water temperature may prevent the engine from reaching its optimal working state, affecting power output and emission control.

[0078] Therefore, it is necessary to control the engine to run at the first target speed so that the new aftertreatment temperature is greater than the first temperature threshold, and the coolant temperature is greater than the preset second temperature threshold.

[0079] The following is an introduction with specific examples.

[0080] Figure 2 The regeneration logic diagram of the post-treatment system provided for this application is as follows: Figure 2 As shown in the figure, the intelligent control strategy adds automatic regeneration demand and regeneration stage identification functions to the original vehicle control strategy, monitors the temperature rise (water temperature and post-treatment temperature) during the regeneration process, and intelligently controls the operation of the main pump and engine during the regeneration process to ensure that automatic regeneration can be completed normally even if the user's improper operation causes the equipment to idle for a long time.

[0081] 1. Intelligent control strategy triggering conditions:

[0082] The post-processing enters the automatic regeneration heating mode for T1=5min (i.e. the third time period), and there is no manual regeneration request (i.e. the automatic regeneration process), and there is no pilot handle action (i.e. the construction machinery is not operating).

[0083] The engine requires to enter automatic regeneration or after entering automatic regeneration, the excavator has no action for 5 minutes, resulting in low water temperature or post-processing temperature (the thresholds vary from engine manufacturer to engine manufacturer).

[0084] 2. Intelligent control strategy exit conditions:

[0085] Automatic regeneration is completed, or there is a pilot handle action, or the vehicle exits idle mode (for example, the user operates the vehicle to drive)

[0086] 3. Specific intelligent control strategy solution:

[0087] a) The post-treatment enters the automatic regeneration and heating mode. The device lasts for T1=5min without manual regeneration request and pilot handle action, resulting in low water temperature or post-treatment temperature, triggering dual pump loading. With the current basic displacement as the initial value, the dual pumps are loaded to the maximum displacement (first displacement) for T2=2min (loading duration).

[0088] b) After the dual pumps reach maximum displacement, continue for T3=10min (first duration). If the water temperature or aftertreatment temperature still does not reach the engine requirement threshold, slowly increase the engine speed at a rate of 300rpm / min to a maximum of 1400rpm (first target speed). T4 (speed increase duration) is determined by the initial engine speed.

[0089] c) When the regeneration is completed (non-pilot handle action) and the intelligent control strategy is exited, the dual pump displacement is reduced from the full displacement to the initial basic displacement T6=2min, and the engine speed is reduced to the target speed (i.e. the speed at idle) at a rate of 300rpm / min. T5 (speed reduction time) is determined by the target standard time.

[0090] d) When the intelligent control strategy is exited due to other reasons (such as pilot action being added) (the vehicle exits the regeneration control in idle mode), the dual-pump displacement is directly reduced to the initial basic displacement, and the duration of the displacement change t6 is less than 3S. The dual-pump displacement is controlled by positive flow, and the engine speed drops to the idle speed, or to the speed required by the user to operate the vehicle, and the duration of the speed change T5 is less than 3S.

[0091] For the exit of the intelligent control strategy, if the user operates the vehicle to exit the idle mode, it needs to quickly return to the initial state, so the displacement decrease speed is greater than the displacement decrease speed when regeneration is completed. In addition, the engine speed decrease speed is also greater than the engine speed decrease speed when regeneration is completed.

[0092] The regeneration control method of this solution does not require hardware changes, and the program upgrade has no impact on the performance of other components; it ensures that the engine can complete automatic regeneration normally even when idling for a long time due to user operation.

[0093] Figure 3 Another schematic diagram of the post-processing system regeneration logic provided by the present application is as follows: Figure 3 As shown, the increase in pump displacement and engine speed is a step-by-step increase, rather than directly increasing the displacement or speed to the maximum value.

[0094] First, the pump displacement is increased to the first displacement, which is greater than the initial displacement but less than the maximum displacement. After the first displacement has been running for a period of time, the temperature has not reached the temperature threshold; then the engine speed is increased to the first target speed, which does not refer to the maximum speed in this example. The engine is controlled to run at the first target speed for a preset fourth duration. If the post-processing temperature (i.e., the first process post-processing temperature) at the end of the fourth duration is still less than the first temperature threshold, the injection displacement is increased from the first displacement to the preset second displacement; the second displacement is greater than the first displacement.

[0095] The second displacement continues for a preset fifth time period, and it is determined whether the after-treatment temperature (ie, the second process after-treatment temperature) at the end of the fifth time period is greater than the first temperature threshold.

[0096] If the temperature at the end of the fifth time period (ie, the second process post-processing temperature) is less than the first temperature threshold, the engine speed is increased from the first target speed to a preset second target speed.

[0097] The system is operated at the second displacement and the second target speed until a new aftertreatment temperature is greater than a first temperature threshold.

[0098] If the temperature at the end of the fifth period is less than the first temperature threshold, the engine is operated at the second displacement and the first target speed.

[0099] It should be noted that the number of stages of the step-up can be two, three, four or more stages, that is, the displacement is increased and stabilized for a period of time. When the temperature does not reach the threshold, the engine speed is increased. After stabilizing for a period of time, the temperature still does not reach the threshold, and the displacement is continued to be increased. After the displacement is increased, the temperature threshold is still not reached, and the engine speed is continued to be increased. And so on, until the post-processing temperature reaches the temperature threshold.

[0100] Through this example, by increasing the fuel injection displacement and engine speed in a step-by-step manner, compared with directly increasing the fuel injection volume to the maximum, energy can be saved and fuel consumption can be reduced. Compared with adjusting the speed first, or increasing the fuel injection volume to the maximum and then increasing the engine speed, the step-by-step increase can make the user feel stable and will not produce sudden changes.

[0101] Figure 4 The schematic diagram of the structure of the control device for post-processing system regeneration provided in this application is as follows: Figure 4 As shown, the control device 40 for post-treatment system regeneration provided in this embodiment includes:

[0102] The displacement control module 401 is used for increasing the fuel injection displacement of the pump from an initial value to a preset first displacement and maintaining it for a preset first time period when the vehicle is in an idle mode and an automatic regeneration signal of the post-processing system is detected;

[0103] An acquisition module 402 is used to acquire a post-processing temperature at the end of a first time period;

[0104] A speed control module 403, configured to increase the engine speed to a preset first target speed if the post-processing temperature is less than or equal to a preset first temperature threshold;

[0105] a regeneration control module 404, configured to control the engine to operate at the first target speed until a new aftertreatment temperature is greater than the first temperature threshold;

[0106] The regeneration exit module 405 is used to perform regeneration at a temperature greater than the first temperature threshold. When the regeneration exit condition is met, the first displacement is reduced to the initial value and the first target speed is reduced to the actual required speed of the vehicle. The regeneration exit condition includes the regeneration time reaching a preset second time, or detecting that the vehicle exits the idle mode.

[0107] Optionally, the acquisition module 402 is further used to: acquire the coolant temperature of the engine;

[0108] Accordingly, the regeneration control module 404 is specifically used for:

[0109] The engine is controlled to operate at the first target speed until a new aftertreatment temperature is greater than the first temperature threshold and the coolant temperature is greater than a preset second temperature threshold.

[0110] Optionally, the displacement control module 401 is specifically used for:

[0111] When the automatic regeneration signal is detected, no operation is performed within a preset third time period;

[0112] After the third time period ends, the fuel injection displacement of the pump is increased from the initial value to the first displacement and lasts for the first time period.

[0113] Optionally, the regeneration control module 404 is specifically used for:

[0114] controlling the engine to run at the first target speed for a preset fourth time period, and if the first process post-processing temperature is still less than the first temperature threshold at the end of the fourth time period, increasing the injection displacement from the first displacement to a preset second displacement;

[0115] Continue at the second displacement for a preset fifth time period, and determine whether the second process post-processing temperature is greater than the first temperature threshold at the end of the fifth time period;

[0116] If the second process post-processing temperature is less than the first temperature threshold, increasing the engine speed from the first target speed to a preset second target speed;

[0117] The system is operated at the second displacement and the second target speed until a new aftertreatment temperature is greater than the first temperature threshold.

[0118] Optionally, the regeneration control module 404 is further configured to:

[0119] If the second process aftertreatment temperature is greater than the first temperature threshold, the system operates at the second displacement and the first target speed.

[0120] Optionally, it is detected that the displacement decreasing speed when the vehicle exits the idle mode is greater than the displacement decreasing speed when the regeneration duration reaches the second duration.

[0121] Optionally, it is detected that the rate of decrease of the engine speed when the vehicle exits the idle mode is greater than the rate of decrease of the engine speed when the regeneration duration reaches the second duration.

[0122] The control device for regeneration of the post-treatment system provided in this embodiment can execute the method provided in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be described in detail here.

[0123] Figure 5 This is a schematic diagram of the structure of the electronic device provided in this application. Figure 5 As shown, the electronic device 50 provided in this embodiment includes: at least one processor 501 and a memory 502. Optionally, the device 50 also includes a communication component 503. The processor 501, the memory 502 and the communication component 503 are connected via a bus 504.

[0124] In a specific implementation process, at least one processor 501 executes the computer-executable instructions stored in the memory 502, so that at least one processor 501 executes the above method.

[0125] The specific implementation process of the processor 501 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0126] In the above embodiments, it should be understood that the processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the invention can be directly implemented as a hardware processor, or can be implemented by a combination of hardware and software modules in the processor.

[0127] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (NVM), such as at least one disk storage.

[0128] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of this application is not limited to only one bus or one type of bus.

[0129] The present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0130] The present application also provides an engineering machine, such as an excavator or a container forklift, wherein the engineering machine includes a controller, and the controller is used to execute the method in the above embodiment.

[0131] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.

[0132] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0133] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0134] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0135] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0136] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0137] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0138] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0139] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A control method for regeneration of a post-treatment system, characterized in that: The method comprises: When the vehicle is in idle mode and an automatic regeneration signal of the after-treatment system is detected, the fuel injection displacement of the pump is increased from an initial value to a preset first displacement and lasts for a preset first time period; Get the post-processing temperature at the end of the first time period; If the post-processing temperature is less than or equal to a preset first temperature threshold, increasing the engine speed to a preset first target speed; controlling the engine to operate at the first target speed until a new aftertreatment temperature is greater than the first temperature threshold; Regeneration is performed at a temperature greater than the first temperature threshold, and when a regeneration exit condition is reached, the first displacement is reduced to the initial value, and the first target speed is reduced to the actual required speed of the vehicle, and the regeneration exit condition includes the regeneration duration reaching a preset second duration, or detecting that the vehicle exits idle mode.

2. The method according to claim 1, characterized in that The method further includes: obtaining a coolant temperature of the engine; Accordingly, controlling the engine to operate at the first target speed until a new aftertreatment temperature is greater than the first temperature threshold includes: The engine is controlled to operate at the first target speed until a new aftertreatment temperature is greater than the first temperature threshold and the coolant temperature is greater than a preset second temperature threshold.

3. The method according to claim 1, characterized in that When the automatic regeneration signal of the after-treatment system is detected, the fuel injection displacement of the pump is increased from an initial value to a preset first displacement and lasts for a preset first time period, including: When the automatic regeneration signal is detected, no operation is performed within a preset third time period; After the third time period ends, the fuel injection displacement of the pump is increased from the initial value to the first displacement and lasts for the first time period.

4. The method according to claim 1, characterized in that: The controlling the engine to operate at the first target speed until a new aftertreatment temperature is greater than the first temperature threshold comprises: controlling the engine to run at the first target speed for a preset fourth time period, and if the first process post-processing temperature is still less than the first temperature threshold at the end of the fourth time period, increasing the injection displacement of the pump from the first displacement to a preset second displacement; Continuing the second displacement for a preset fifth time period, and determining whether the second process post-processing temperature is greater than the first temperature threshold at the end of the fifth time period; If the second process post-processing temperature is less than the first temperature threshold, increasing the engine speed from the first target speed to a preset second target speed; The system is operated at the second displacement and the second target speed until a new aftertreatment temperature is greater than the first temperature threshold.

5. The method according to claim 4, characterized in that The method further comprises: If the second process aftertreatment temperature is greater than the first temperature threshold, the system operates at the second displacement and the first target speed.

6. The method according to any one of claims 1 to 5, characterized in that: It is detected that the rate of decrease of the fuel injection displacement of the pump when the vehicle exits the idle mode is greater than the rate of decrease of the fuel injection displacement of the pump when the regeneration time reaches the second time.

7. The method according to claim 6, characterized in that It is detected that the decreasing speed of the engine speed when the vehicle exits the idle mode is greater than the decreasing speed of the engine speed when the regeneration time reaches the second time.

8. A control device for regeneration of a post-treatment system, characterized in that: The device comprises: A displacement control module, for when the vehicle is in an idle mode, when an automatic regeneration signal of the after-treatment system is detected, increases the injection displacement of the pump from an initial value to a preset first displacement and continues for a preset first time period; An acquisition module, used for acquiring a post-processing temperature at the end of a first time period; a speed control module, configured to increase the engine speed to a preset first target speed if the post-processing temperature is less than or equal to a preset first temperature threshold; a regeneration control module, configured to control the engine to operate at the first target speed until a new aftertreatment temperature is greater than the first temperature threshold; A regeneration exit module is used to perform regeneration at a temperature greater than the first temperature threshold. When the regeneration exit condition is met, the first displacement is reduced to the initial value and the first target speed is reduced to the actual required speed of the vehicle. The regeneration exit condition includes the regeneration time reaching a preset second time, or detecting that the vehicle exits the idle mode.

9. A controller, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 7.

10. An engineering machine, characterized in that: It comprises a controller for executing the method according to any one of claims 1 to 7, or comprises a control device for regenerating a post-treatment system according to claim 8.

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