Post-processing system control method, device, computer equipment and storage medium

Abstract

The present invention discloses an aftertreatment system control method, an aftertreatment system control device, a computer device, and a computer storage medium. The aftertreatment system control method includes: obtaining a first pressure differential of a first particulate trap and a second pressure differential of a second particulate trap; comparing the second pressure differential with a first limit value, wherein the first limit value is used to indicate the amount of particulate deposited in the second particulate trap; comparing the first pressure differential with a second limit value, wherein the second limit value is used to indicate the operating state of the first particulate trap, based on the second pressure differential being greater than the first limit value; and triggering regeneration based on the first pressure differential being greater than the second limit value. The method of the present invention can control the aftertreatment system, clean the second particulate trap, reduce the probability of particulates clogging the second particulate trap, and thereby reduce the probability of increased exhaust backpressure caused by particulates clogging the aftertreatment system.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle post-processing, and in particular to a post-processing system control method, a post-processing system control device, a computer device, and a computer storage medium. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] In order to reduce nitrogen oxides in diesel engine exhaust, urea is injected into the exhaust in related art, and ammonia generated by thermal decomposition of urea reacts with nitrogen oxides, thereby reducing nitrogen oxides in the exhaust.

[0004] However, urea will produce ammonium salt particles after thermal decomposition. Urea and ammonium salt particles can easily clog the after-treatment system, resulting in increased exhaust back pressure. Summary of the Invention

[0005] The present invention aims to at least address the problem of urea and ammonium salt particles easily clogging the exhaust gas post-treatment system, thereby increasing exhaust back pressure. This objective is achieved through the following technical solutions:

[0006] A first aspect of the present invention provides a post-processing system control method, which is applied to a post-processing system, the post-processing system comprising:

[0007] a first particulate trap, a selective catalytic reduction device, a second particulate trap, and a urea nozzle, wherein the outlet of the first particulate trap is connected to the inlet of the selective catalytic reduction device, the outlet of the selective catalytic reduction device is connected to the inlet of the second particulate trap, and the urea nozzle is connected to the inlet of the selective catalytic reduction device in a disconnectable manner.

[0008] The post-processing system control method includes:

[0009] obtaining a first pressure difference of the first particle trap and a second pressure difference of the second particle trap;

[0010] comparing the second pressure difference with a first limit value, wherein the first limit value is used to represent the amount of particle deposition in the second particle trap;

[0011] comparing the first pressure difference with a second limit value according to the second pressure difference being greater than the first limit value, wherein the second limit value is used to indicate an operating state of the first particle trap;

[0012] Based on the first pressure difference being greater than the second limit, control triggers regeneration.

[0013] The aftertreatment system control method of the present invention can control the aftertreatment system so that it can capture urea and ammonium salt particles generated by urea thermal decomposition through a secondary particle trap, thereby reducing the amount of urea and ammonium salt particles generated in the exhaust gas. When the secondary particle trap becomes overloaded with particles, the aftertreatment system control method of this embodiment can trigger regeneration to clear the particles from the secondary particle trap. This cleaning of the secondary particle trap reduces the probability of particle blockage in the secondary particle trap, thereby reducing the probability of increased exhaust backpressure caused by particle blockage in the aftertreatment system.

[0014] In some embodiments, the step of controlling triggering regeneration based on the first pressure difference being greater than the second limit value includes:

[0015] comparing the first pressure difference with a third limit value according to the first pressure difference being greater than the second limit value, wherein the third limit value is used to represent the amount of particles deposited in the first particle trap, and the third limit value is greater than the second limit value;

[0016] Based on the first pressure difference being greater than the third limit, control triggers normal regeneration.

[0017] In some embodiments, the step of controlling the regeneration triggering according to the first pressure difference being greater than the second limit value further includes:

[0018] acquiring a carbon load in the first particulate trap according to the first pressure difference being less than or equal to the third limit value;

[0019] comparing the carbon load with a fourth limit value, wherein the fourth limit value is used to represent the amount of carbon deposits in the first particulate trap;

[0020] Based on the carbon load being greater than the fourth limit value, control triggers normal regeneration.

[0021] In some embodiments, the step of controlling the regeneration triggering according to the first pressure difference being greater than the second limit value further includes:

[0022] In response to the carbon load being less than or equal to the fourth limit value, control triggers forced regeneration.

[0023] In some embodiments, the post-processing system control method further includes:

[0024] According to the first pressure difference being less than or equal to the second limit value, a control step is performed, the control step including: controlling cleaning of the second particulate trap.

[0025] In some embodiments, the controlling step further includes:

[0026] A prompt signal is issued, where the prompt signal is used to instruct the terminal to issue a prompt message, where the prompt message is used to prompt that the first particle trap is in an abnormal state.

[0027] In some embodiments, the post-processing system control method further includes:

[0028] According to the second pressure difference being not greater than the first limit value, it is determined that the second particulate trap is in a normal state.

[0029] A second aspect of the present invention provides a post-processing system control device, which is applied to a post-processing system. The post-processing system includes:

[0030] a first particulate trap, a selective catalytic reduction device, a second particulate trap, and a urea nozzle, wherein the outlet of the first particulate trap is connected to the inlet of the selective catalytic reduction device, the outlet of the selective catalytic reduction device is connected to the inlet of the second particulate trap, and the urea nozzle is connected to the inlet of the selective catalytic reduction device in a disconnectable manner.

[0031] The post-processing system control device includes:

[0032] an acquisition module, configured to acquire a first pressure difference of the first particle trap and a second pressure difference of the second particle trap;

[0033] a first comparison module, configured to compare the second pressure difference with a first limit value, wherein the first limit value is used to represent an amount of particle deposition in the second particle trap;

[0034] a second comparing module, configured to compare the first pressure difference with a second limit value according to the second pressure difference being greater than the first limit value, wherein the second limit value is used to indicate an operating state of the first particulate trap;

[0035] The regeneration control module is configured to control triggering of regeneration according to the first pressure difference being greater than the second limit value.

[0036] A third aspect of the present invention provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the post-processing system control method as described in the first aspect above when executing the computer program.

[0037] The fourth aspect of the present invention provides a computer storage medium having computer-readable instructions stored thereon. When the computer-readable instructions are read by one or more processors, the one or more processors execute the steps of the post-processing system control method as described in the first aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference numerals are used throughout the accompanying drawings to denote the same components. In the accompanying drawings:

[0039] Figure 1 is a flow chart of a post-processing system control method according to an embodiment of the present invention;

[0040] Figure 2 A logic diagram of a post-processing system control method according to an embodiment of the present invention;

[0041] Figure 3 A logic diagram of a post-processing system control method according to a further embodiment of the present invention;

[0042] Figure 4 This is a logic diagram of a post-processing system control method according to an embodiment of the present invention;

[0043] Figure 5 is a schematic diagram of a post-processing system control device according to an embodiment of the present invention;

[0044] Figure 6 is a schematic diagram of a post-processing system according to an embodiment of the present invention;

[0045] Figure 7 is a cross-sectional view of a second particle trap according to an embodiment of the present invention along the axial direction;

[0046] Figure 8 for Figure 7 Front view at point a;

[0047] Figure 9 for Figure 7 Front view at point b in the middle. DETAILED DESCRIPTION

[0048] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0049] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0050] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0051] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature would then be oriented as "above" or "above" the other element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein should be interpreted accordingly.

[0052] Diesel engine exhaust contains NOx (nitrogen oxides) and PN (particulate matter). The particulate matter produced in engine exhaust is soot and ash. To ensure that NOx and PN in exhaust meet regulatory requirements, a DPF (Diesel Particulate Filter) is used to capture PN, thereby reducing the PN value. After the exhaust is discharged from the DPF, urea solution is injected into the exhaust. The ammonia produced by the thermal decomposition of the urea solution reacts with NOx to reduce the NOx content in the exhaust.

[0053] However, after urea is thermally decomposed, ammonium salt particles will be produced. Urea and ammonium salt particles can easily clog the after-treatment system, resulting in increased exhaust back pressure. Increased exhaust back pressure will lead to increased fuel consumption, decreased power and other adverse effects.

[0054] To at least address the problem of urea and ammonium salt particles easily clogging the after-treatment system, thereby increasing exhaust back pressure, embodiments of the present invention provide an after-treatment system control method that can capture ammonium salt particles and urea generated after urea thermal decomposition and process the captured ammonium salt particles and urea, thereby reducing the probability of urea and ammonium salt particles clogging the after-treatment system.

[0055] The following describes a post-processing system control method according to an embodiment of the present invention with reference to the accompanying drawings.

[0056] The post-processing system control method of the embodiment of the present invention is applied to a post-processing system, such as Figure 6 As shown, the aftertreatment system includes:

[0057] A first particulate trap, a selective catalytic reduction device, a second particulate trap and a urea nozzle are provided. The outlet of the first particulate trap is communicated with the inlet of the selective catalytic reduction device, the outlet of the selective catalytic reduction device is communicated with the inlet of the second particulate trap, and the urea nozzle is connectably connected to the inlet of the selective catalytic reduction device.

[0058] Selective Catalytic Reduction (SCR) is a widely used technology for industrial flue gas denitrification. During the SCR process, NOx is reduced to harmless nitrogen (N2) and water (H2O) using ammonia (NH3) as a reducing agent over a catalyst.

[0059] A selective catalytic reduction device (SCR device) is a device that uses SCR technology to reduce NOx.

[0060] In the aftertreatment system of this embodiment, PN in the engine exhaust is trapped by a first particulate trap. The exhaust gas discharged from the first particulate trap enters a selective catalytic reduction device. A urea nozzle sprays urea, which is thermally decomposed to produce ammonia. The selective catalytic reduction device uses the ammonia to reduce NOx. The exhaust gas discharged from the selective catalytic reduction device enters a second particulate trap. The second particulate trap traps urea and ammonium salt particles in the exhaust gas, thereby reducing PN in the exhaust gas generated by urea and urea thermal decomposition.

[0061] Figure 7 In the figure, point a is the inlet of the second particulate trap, and point b is the outlet of the second particulate trap.

[0062] Combine Figure 7 、 Figure 8 and Figure 9 As shown, specifically, the second particulate trap is a half-wall flow particulate trap, the inlet of the second particulate trap does not block the channel to reduce the exhaust pressure, and the outlet of the second particulate trap blocks the channel.

[0063] Optionally, the first particle trap is a wall-flow particle trap.

[0064] like Figure 6 As shown, the aftertreatment system further includes a HC nozzle and a DOC, the HC nozzle is disconnectably connected to the inlet of the DOC, and the outlet of the DOC is connected to the inlet of the first particulate trap.

[0065] The HC nozzle is used to spray HC (hydrocarbon).

[0066] DOC (Diesel Oxidation Catalyst) is used to convert carbon monoxide (CO) and hydrocarbons (HC) in exhaust gas into carbon dioxide (CO2) and water (H2O).

[0067] like Figure 6 As shown, further, the aftertreatment system also includes a first differential pressure sensor and a second differential pressure sensor, the first differential pressure sensor is coupled to the first particulate trap to be able to detect the pressure difference of the first particulate trap, and the second differential pressure sensor is coupled to the second particulate trap to be able to detect the pressure difference of the second particulate trap.

[0068] Combine Figure 1 、 Figure 2 and Figure 4 As shown, the post-processing system control method includes:

[0069] S100, obtaining a first pressure difference of a first particle trap and a second pressure difference of a second particle trap;

[0070] S200, comparing the second pressure difference with a first limit value, wherein the first limit value is used to represent the amount of particles deposited in the second particle trap;

[0071] S300: Based on the second pressure difference being greater than the first limit value, comparing the first pressure difference with the second limit value, wherein the second limit value is used to indicate the working state of the first particulate trap;

[0072] S400 : Control triggering regeneration based on the first pressure difference being greater than a second limit value.

[0073] S100 : Acquire a first pressure difference of a first particle trap and a second pressure difference of a second particle trap.

[0074] The first pressure differential can reflect the amount of PN in the first particulate trap, and the second pressure differential can reflect the amount of PN in the second particulate trap. The first pressure differential can be used to preliminarily determine the state of the first particulate trap, and the second pressure differential can be used to preliminarily determine the state of the second particulate trap.

[0075] S200 : Compare the second pressure difference with a first limit value, where the first limit value is used to represent the amount of particles deposited in the second particle trap.

[0076] The second pressure difference is compared with the first limit value, so that the state of the second particulate trap can be determined.

[0077] The specific value of the first limit can be determined comprehensively based on engine parameters, after-treatment system parameters and other relevant parameters.

[0078] As some examples, the first limit value ranges from 3 kPa (kilopascal) to 5 kPa (kilopascal).

[0079] S300 : Based on the second pressure difference being greater than the first limit value, compare the first pressure difference with the second limit value, wherein the second limit value is used to represent the working state of the first particulate trap.

[0080] The second pressure difference is greater than the first limit value, indicating that there is too much PN in the second particulate trap and the particles in the second particulate trap need to be cleaned.

[0081] The working state of the first particle trap includes at least: a normal working state, a damaged state, and a removed state. The working state of the first particle trap can be determined by comparing the first pressure difference with the second limit value.

[0082] As some examples, the second limit value ranges from 1 kPa to 2 kPa.

[0083] S400 : Control triggering regeneration based on the first pressure difference being greater than a second limit value.

[0084] Regeneration refers to the process of removing particles from the DPF, which can restore the DPF's filtering performance.

[0085] If the first pressure differential exceeds the second limit, the first particulate trap is operating normally, and regeneration is triggered to clear particulates from the second particulate trap. Cleaning the second particulate trap reduces the probability of particulates clogging the second particulate trap, thereby reducing the probability of increased exhaust back pressure due to particulates clogging the aftertreatment system.

[0086] In addition, triggering regeneration can also clean the particles in the first particle trap.

[0087] The aftertreatment system control method according to an embodiment of the present invention can control the aftertreatment system so that it can capture urea and ammonium salt particles generated by urea thermal decomposition through a secondary particle trap, thereby reducing the amount of particulate matter (PN) generated by urea and urea thermal decomposition in the exhaust. When the secondary particle trap becomes overloaded with particles, the aftertreatment system control method according to an embodiment of the present invention can trigger regeneration to clear the particles from the secondary particle trap. This cleaning of the secondary particle trap reduces the probability of particle blockage in the secondary particle trap, thereby reducing the probability of increased exhaust backpressure caused by particle blockage in the aftertreatment system.

[0088] Combine Figure 3 and Figure 4 As shown, in some embodiments, S400, the step of controlling triggering regeneration according to the first pressure difference being greater than the second limit value, includes:

[0089] comparing the first pressure difference with a third limit value based on the first pressure difference being greater than the second limit value, wherein the third limit value is used to characterize the amount of particle deposition in the first particle trap, and the third limit value is greater than the second limit value;

[0090] Based on the first pressure difference being greater than a third limit value, control triggers normal regeneration.

[0091] The first pressure difference is compared with the third limit value, so that the state of the first particulate trap can be determined.

[0092] If the first pressure differential exceeds the third limit, it indicates that excessive PN is present in the first particulate trap, requiring particle removal from the first particulate trap. In step S300, if the second pressure differential exceeds the first limit, it indicates that excessive PN is present in the second particulate trap, requiring particle removal from the second particulate trap. Therefore, control triggers normal regeneration to remove particles from both the first and second particulate traps. This reduces the probability of particulates clogging the second particulate trap, thereby reducing the probability of increased exhaust backpressure caused by particulates clogging the aftertreatment system.

[0093] The specific value of the third limit can be determined comprehensively based on engine parameters, after-treatment system parameters and other relevant parameters.

[0094] As some examples, the first limit value ranges from 6 kPa to 9 kPa.

[0095] Combine Figure 3 and Figure 4 As shown, in some embodiments, S400, the step of controlling the regeneration triggering according to the first pressure difference being greater than the second limit value, further includes:

[0096] obtaining a carbon load in the first particulate trap based on the first pressure difference being less than or equal to a third limit value;

[0097] comparing the carbon load with a fourth limit value, wherein the fourth limit value is used to represent the amount of carbon deposits in the first particulate trap;

[0098] Based on the carbon load being greater than a fourth limit value, the control triggers normal regeneration.

[0099] The first pressure difference is less than or equal to the third limit value, indicating that the number of particles in the first particulate trap is small. Whether the first particulate trap needs to be cleaned is further determined by the carbon load in the first particulate trap, so as to more accurately determine whether the first particulate trap needs to be cleaned.

[0100] If the carbon load exceeds the fourth limit, it indicates that the first particulate filter needs to be cleaned. Therefore, control triggers normal regeneration to clean particulates from both the first and second particulate filters. This reduces the probability of particulates clogging the second particulate filter, thereby reducing the likelihood of increased exhaust backpressure from particulates clogging the aftertreatment system.

[0101] As some examples, the carbon loading ranges from 3 g / l (grams per liter) to 5 g / l (grams per liter).

[0102] Combine Figure 3 and Figure 4 As shown, in some embodiments, S400, the step of controlling the regeneration triggering according to the first pressure difference being greater than the second limit value, further includes:

[0103] Based on the carbon load being less than or equal to a fourth limit value, control triggers forced regeneration.

[0104] If the carbon load is less than or equal to the fourth limit, the first particulate filter does not require particulate removal, but the second particulate filter does. Therefore, forced regeneration is triggered to remove particulates from the second particulate filter, reducing the probability of particulates clogging the second particulate filter and, consequently, the increased exhaust backpressure caused by particulates clogging the aftertreatment system. Furthermore, forced regeneration also cleans the first particulate filter.

[0105] Combine Figure 2 and Figure 4 As shown, in some embodiments, the post-processing system control method further includes:

[0106] According to the first pressure difference being less than or equal to the second limit value, a control step is executed, the control step including: controlling the cleaning of the second particulate trap.

[0107] The first pressure difference is less than or equal to the second limit value, indicating that the first particulate trap is in an abnormal state, where the abnormal state includes a damaged state or a removed state.

[0108] When the first particulate filter is abnormal, the second particulate filter captures soot, ash, urea, and ammonium salt particles. Controlling the cleaning of the second particulate filter reduces the probability of particulates clogging the second particulate filter, thereby reducing the probability of increased exhaust backpressure caused by particulates clogging the aftertreatment system.

[0109] Combine Figure 2 and Figure 4 As shown, in some embodiments, the controlling step further includes:

[0110] A prompt signal is sent, where the prompt signal is used to instruct the terminal to send a prompt message, where the prompt message is used to prompt that an abnormal state exists in the first particulate trap.

[0111] The prompt information can indicate that the first particle trap is in an abnormal state, thereby prompting the user to check the first particle trap.

[0112] The terminal may be a physical terminal, for example, the terminal is a dashboard. In response to receiving the prompt signal, the dashboard displays relevant text or icons indicating that the first particulate filter is in an abnormal state, so as to issue a prompt message.

[0113] The terminal may also be a virtual terminal, for example, the terminal is a mobile phone client connected to the vehicle network. In response to receiving the prompt signal, the mobile phone client displays relevant information indicating that the first particulate filter is in an abnormal state, thereby issuing the prompt information.

[0114] Combine Figure 2 and Figure 4 As shown, in some embodiments, the post-processing system control method further includes:

[0115] According to the second pressure difference being not greater than the first limit value, it is determined that the second particulate trap is in a normal state.

[0116] The second particulate trap is in a normal state, which means that the second particulate trap can work normally, and the number of particles in the second particulate trap is small and does not need to be cleaned.

[0117] The second pressure difference is not greater than the first limit value, indicating that the second particulate trap is in a normal state. Therefore, it is determined that the second particulate trap is in a normal state, and no processing action is taken on the second particulate trap.

[0118] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0119] Based on the same inventive concept, embodiments of the present application also provide a post-processing system control device for implementing the above-mentioned post-processing system control method. The solution provided by this device is similar to the solution described in the above-mentioned method. Therefore, the specific limitations in one or more of the following post-processing system control device embodiments can be found in the above-mentioned limitations on the post-processing system control method and will not be further elaborated here.

[0120] The post-processing system control device according to an embodiment of the present invention is applied to a post-processing system, which includes:

[0121] a first particulate trap, a selective catalytic reduction device, a second particulate trap, and a urea nozzle; an outlet of the first particulate trap is connected to an inlet of the selective catalytic reduction device; an outlet of the selective catalytic reduction device is connected to an inlet of the second particulate trap; and the urea nozzle is connected to the inlet of the selective catalytic reduction device in a disconnectable manner.

[0122] like Figure 5 As shown, the after-treatment system control device includes:

[0123] An acquisition module, configured to acquire a first pressure difference of the first particle trap and a second pressure difference of the second particle trap;

[0124] a first comparison module, configured to compare the second pressure difference with a first limit value, wherein the first limit value is used to represent an amount of particle deposition in the second particle trap;

[0125] a second comparison module, configured to compare the first pressure difference with a second limit value according to the second pressure difference being greater than the first limit value, wherein the second limit value is used to indicate an operating state of the first particulate trap;

[0126] The regeneration control module is configured to control triggering of regeneration according to the first pressure difference being greater than a second limit value.

[0127] In some embodiments, the control regeneration module is further configured to:

[0128] comparing the first pressure difference with a third limit value based on the first pressure difference being greater than the second limit value, wherein the third limit value is used to characterize the amount of particle deposition in the first particle trap, and the third limit value is greater than the second limit value;

[0129] Based on the first pressure difference being greater than a third limit value, control triggers normal regeneration.

[0130] In some embodiments, the control regeneration module is further configured to:

[0131] obtaining a carbon load in the first particulate trap based on the first pressure difference being less than or equal to a third limit value;

[0132] comparing the carbon load with a fourth limit value, wherein the fourth limit value is used to represent the amount of carbon deposits in the first particulate trap;

[0133] Based on the carbon load being greater than a fourth limit value, the control triggers normal regeneration.

[0134] In some embodiments, the control regeneration module is further configured to: control triggering of forced regeneration according to the carbon load being less than or equal to a fourth limit value.

[0135] In some embodiments, the after-treatment system control device further includes:

[0136] The control step execution module is used to execute the control step according to the first pressure difference being less than or equal to the second limit value, and the control step includes: controlling the cleaning of the second particulate trap.

[0137] In some embodiments, the control step execution module is further configured to:

[0138] A prompt signal is sent, where the prompt signal is used to instruct the terminal to send a prompt message, where the prompt message is used to prompt that an abnormal state exists in the first particulate trap.

[0139] In some embodiments, the post-processing system control device further includes: a judgment module, configured to judge that the second particulate trap is in a normal state according to the second pressure difference being greater than the first limit value.

[0140] Those skilled in the art will understand that Figure 5 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific post-processing system control device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0141] An embodiment of the present invention further provides a computer device including a memory and a processor. The memory stores a computer program, and the processor implements the steps of the post-processing system control method of the above embodiment when executing the computer program.

[0142] Furthermore, the computer device includes a processor, a memory, an input / output (I / O) interface, and a communication interface. The processor, memory, and I / O interface are connected via a system bus, and the communication interface is connected to the system bus via the I / O interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The I / O interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, it implements the post-processing control method described above.

[0143] An embodiment of the present invention further provides a computer storage medium having computer-readable instructions stored thereon. When the computer-readable instructions are read by one or more processors, the one or more processors execute the steps of the post-processing system control method of the above embodiment.

[0144] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable storage medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable storage medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable storage media include the following: an electrical connection with one or more wires (electronic device), a portable computer disk cartridge (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM, or flash memory), a fiber optic device, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable storage medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0145] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement the hardware: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0146] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A post-processing system control method, characterized in that: Applied to a post-processing system, the post-processing system comprising: a first particulate trap, a selective catalytic reduction device, a second particulate trap, a DOC, an HC nozzle, and a urea nozzle, wherein the HC nozzle is disconnectably connected to the inlet of the DOC, the outlet of the DOC is connected to the inlet of the first particulate trap, the outlet of the first particulate trap is connected to the inlet of the selective catalytic reduction device, the outlet of the selective catalytic reduction device is connected to the inlet of the second particulate trap, and the urea nozzle is disconnectably connected to the inlet of the selective catalytic reduction device. The post-processing system control method includes: obtaining a first pressure difference of the first particle trap and a second pressure difference of the second particle trap; comparing the second pressure difference with a first limit value, wherein the first limit value is used to represent the amount of particle deposition in the second particle trap; comparing the first pressure difference with the second limit value based on the second pressure difference being greater than the first limit value, wherein the second limit value is used to represent an operating state of the first particulate trap, the operating state of the first particulate trap including a normal operating state, a damaged state, and a removed state; Based on the first pressure difference being greater than the second limit, control triggers regeneration.

2. The post-processing system control method according to claim 1, characterized in that: The step of controlling the regeneration triggering according to the first pressure difference being greater than the second limit value comprises: comparing the first pressure difference with a third limit value according to the first pressure difference being greater than the second limit value, wherein the third limit value is used to represent the amount of particles deposited in the first particle trap, and the third limit value is greater than the second limit value; According to the first pressure difference being greater than the third limit value, control is performed to trigger normal regeneration, where the normal regeneration is a regeneration when particulates in the first particulate trap need to be cleared.

3. The post-processing system control method according to claim 2, characterized in that: The step of controlling and triggering regeneration according to the first pressure difference being greater than the second limit value further includes: acquiring a carbon load in the first particulate trap according to the first pressure difference being less than or equal to the third limit value; comparing the carbon load with a fourth limit value, wherein the fourth limit value is used to represent the amount of carbon deposits in the first particulate trap; According to the carbon load being greater than the fourth limit value, control is performed to trigger normal regeneration, where the normal regeneration is regeneration when particulates in the first particulate trap need to be cleaned.

4. The post-processing system control method according to claim 3, characterized in that: The step of controlling and triggering regeneration according to the first pressure difference being greater than the second limit value further includes: According to the carbon load being less than or equal to the fourth limit value, control is performed to trigger forced regeneration, where the forced regeneration is a regeneration when the first particulate trap does not need to be cleaned but particulates in the second particulate trap need to be cleaned.

5. The post-processing system control method according to claim 1, characterized in that: The post-processing system control method further includes: According to the first pressure difference being less than or equal to the second limit value, a control step is performed, wherein the control step includes: controlling cleaning of the second particulate trap.

6. The post-processing system control method according to claim 5, characterized in that: The control step further includes: A prompt signal is issued, where the prompt signal is used to instruct the terminal to issue a prompt message, where the prompt message is used to prompt that the first particle trap is in an abnormal state.

7. The post-processing system control method according to claim 1, characterized in that: The post-processing system control method further includes: According to the second pressure difference being not greater than the first limit value, it is determined that the second particulate trap is in a normal state.

8. A post-processing system control device, characterized in that: Applied to a post-processing system, the post-processing system comprising: a first particulate trap, a selective catalytic reduction device, a second particulate trap, a DOC, an HC nozzle, and a urea nozzle, wherein the HC nozzle is disconnectably connected to the inlet of the DOC, the outlet of the DOC is connected to the inlet of the first particulate trap, the outlet of the first particulate trap is connected to the inlet of the selective catalytic reduction device, the outlet of the selective catalytic reduction device is connected to the inlet of the second particulate trap, and the urea nozzle is disconnectably connected to the inlet of the selective catalytic reduction device. The post-processing system control device includes: an acquisition module, configured to acquire a first pressure difference of the first particle trap and a second pressure difference of the second particle trap; a first comparison module, configured to compare the second pressure difference with a first limit value, wherein the first limit value is used to represent an amount of particle deposition in the second particle trap; a second comparing module, configured to compare the first pressure difference with a second limit value based on the second pressure difference being greater than the first limit value, wherein the second limit value is used to represent an operating state of the first particulate trap, the operating state of the first particulate trap including a normal operating state, a damaged state, and a removed state; The regeneration control module is configured to control triggering of regeneration according to the first pressure difference being greater than the second limit value.

9. A computer device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the post-processing system control method according to any one of claims 1 to 7 when executing the computer program.

10. A computer storage medium, characterized in that The computer storage medium stores computer-readable instructions, which, when read by one or more processors, cause the one or more processors to execute the steps of the after-treatment system control method according to any one of claims 1 to 7.

Images