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

Abstract

The invention discloses a post-processing system control method, a post-processing system control device, computer equipment and a computer storage medium, and the post-processing system control method comprises the following steps: obtaining a first pressure difference of a first particle trap and a second pressure difference of a second particle trap; the second pressure difference is compared with a first limit value, and the first limit value is used for representing the particle deposition number in the second particle trap; according to the fact that the second pressure difference is larger than the first limit value, the first pressure difference is compared with the second limit value, and the second limit value is used for representing the working state of the first particle trap; and controlling to trigger regeneration according to the condition that the first pressure difference is greater than the second limit value. According to the method, the after-treatment system can be controlled, the second particle trap can be cleaned, the probability that the second particle trap is blocked by particles can be reduced, and therefore the probability that the exhaust back pressure is increased due to the fact that the after-treatment system is blocked by the particles can be reduced.

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 the 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 purpose of the present invention is to at least solve the problem that urea and ammonium salt particles easily clog the post-treatment system, thereby increasing the exhaust back pressure. This purpose 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, wherein the post-processing system comprises:

[0007] a first particulate trap, a selective catalytic reduction device, a second particulate trap and a urea nozzle, wherein an outlet of the first particulate trap is communicated with an inlet of the selective catalytic reduction device, an outlet of the selective catalytic reduction device is communicated with an inlet of the second particulate trap, and the urea nozzle is connectably connected to the inlet of the selective catalytic reduction device,

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

[0009] acquiring 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 characterize the amount of particle deposition in the second particle trap;

[0011] According to the second pressure difference being greater than the first limit value, comparing the first pressure difference with a second limit value, wherein the second limit value is used to characterize a working state of the first particle trap;

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

[0013] The post-treatment system control method of the present invention can control the post-treatment system, and the post-treatment system can capture urea and ammonium salt particles generated after urea pyrolysis through the second particle trap, thereby reducing PN generated by urea and urea pyrolysis in the exhaust. When there are too many particles captured in the second particle trap, the post-treatment system control method of the embodiment of the present invention can control the triggering of regeneration to clean the particles in the second particle trap. By cleaning the second particle trap, the probability of particles blocking the second particle trap can be reduced, thereby reducing the probability of increased exhaust back pressure caused by particles blocking the post-treatment system.

[0014] In some embodiments, the step of controlling triggering regeneration according to the first pressure difference being greater than the second limit value comprises:

[0015] According to the first pressure difference being greater than the second limit value, comparing the first pressure difference with a third 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;

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

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

[0018] According to the first pressure difference being less than or equal to the third limit value, obtaining the carbon load in the first particulate trap;

[0019] comparing the carbon load with a fourth limit value, wherein the fourth limit value is used to characterize 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 triggering regeneration according to the first pressure difference being greater than the second limit value further includes:

[0022] According 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, wherein the control step includes: controlling cleaning of the second particle trap.

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

[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 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, wherein the post-processing system comprises:

[0030] a first particulate trap, a selective catalytic reduction device, a second particulate trap and a urea nozzle, wherein an outlet of the first particulate trap is communicated with an inlet of the selective catalytic reduction device, an outlet of the selective catalytic reduction device is communicated with an inlet of the second particulate trap, and the urea nozzle is connectably connected to the inlet of the selective catalytic reduction device,

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

[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 characterize the amount of particle deposition in the second particle trap;

[0034] 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 characterize a working state of the first particle trap;

[0035] The control regeneration module is used to control the 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 when the processor executes the computer program, the steps of the post-processing system control method described in the first aspect above are implemented.

[0037] The fourth aspect of the present invention proposes 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 of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent 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 The following 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 a in the middle;

[0047] Fig. 9 for Figure 7 Front view at point b. DETAILED DESCRIPTION

[0048] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the 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. On the contrary, these embodiments are provided in order 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 only for the purpose of describing specific example embodiments 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 "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence 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 interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order 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, 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, spatial 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 figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0052] The exhaust gas produced by a diesel engine contains NOx (nitrogen oxides) and PN (particulate number). The particles produced in the engine exhaust are soot particles and ash particles. In order to make the NOx and PN in the exhaust meet regulatory requirements, in related technologies, PN is captured by DPF (Diesel Particulate Filter) to reduce the PN value of the exhaust. After the exhaust is discharged from the DPF, urea solution is sprayed into the exhaust. The ammonia generated by the thermal decomposition of the urea solution reacts with NOx to reduce the NOx content in the exhaust.

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

[0054] In order to at least solve the problem that urea and ammonium salt particles are easy to block the after-treatment system, thereby causing an increase in exhaust back pressure, an embodiment of the present invention proposes a control method for an after-treatment system, which can capture ammonium salt particles and urea generated after urea pyrolysis, and can process the captured ammonium salt particles and urea, thereby reducing the probability of urea and ammonium salt particles blocking the after-treatment system.

[0055] The following describes a post-processing system control method according to an embodiment of the present invention in conjunction with 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, 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 technology widely used in industrial flue gas denitrification. In the selective catalytic reduction process, NOx is reduced to harmless nitrogen (N2) and water (H2O) by using ammonia (NH3) as a reducing agent under the action of 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 the present embodiment, PN in the engine exhaust is trapped by the first particulate trap, the exhaust gas discharged by the first particulate trap enters the selective catalytic reduction device, the urea nozzle sprays urea, the urea is thermally decomposed to produce ammonia, the selective catalytic reduction device reduces NOx by the ammonia, the exhaust gas discharged by the selective catalytic reduction device enters the second particulate trap, the second particulate trap traps urea and ammonium salt particles in the exhaust gas, thereby reducing PN in the exhaust gas caused by urea and urea thermal decomposition.

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

[0062] Combination Figure 7 , Figure 8 and Fig. 9 As shown, specifically, the second particulate trap is a semi-wall flow particulate trap, the inlet of the second particulate trap does not block the channel so as 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, further, the aftertreatment system further includes a HC nozzle and a DOC, the HC nozzle is connected to the inlet of the DOC in a switchable manner, 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 the exhaust 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 detect the pressure difference of the first particulate trap, and the second differential pressure sensor is coupled to the second particulate trap to detect the pressure difference of the second particulate trap.

[0068] Combination 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 characterize the amount of particle deposition in the second particle trap;

[0071] S300, comparing the first pressure difference with the second limit value according to the second pressure difference being greater than the first limit value, wherein the second limit value is used to characterize the working state of the first particle trap;

[0072] S400 , controlling to trigger regeneration according to the first pressure difference being greater than the 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 difference can reflect the number of PN in the first particle trap, and the second pressure difference can reflect the number of PN in the second particle trap. The state of the first particle trap can be preliminarily determined by the first pressure difference, and the state of the second particle trap can be preliminarily determined by the second pressure difference.

[0075] S200 : Compare the second pressure difference with a first limit value, wherein the first limit value is used to characterize the amount of particle deposition in the second particle trap.

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

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

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

[0079] S300: According to the second pressure difference being greater than the first limit value, the first pressure difference is compared with the second limit value, wherein the second limit value is used to characterize the working state of the first particle trap.

[0080] The second pressure difference is greater than the first limit value, indicating that there are too many 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 at least includes: 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 , controlling to trigger regeneration according to the first pressure difference being greater than the second limit value.

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

[0085] The first pressure difference is greater than the second limit value, the working state of the first particle trap is in a normal state, and the regeneration is triggered to clean the particles in the second particle trap. By cleaning the second particle trap, the probability of particles blocking the second particle trap can be reduced, thereby reducing the probability of increased exhaust back pressure caused by particles blocking the post-treatment system.

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

[0087] The after-treatment system control method of the embodiment of the present invention can control the after-treatment system, and the after-treatment system can capture urea and ammonium salt particles generated after urea pyrolysis through the second particle trap, thereby reducing PN generated by urea and urea pyrolysis in the exhaust. When there are too many particles captured in the second particle trap, the after-treatment system control method of the embodiment of the present invention can control the triggering of regeneration to clean the particles in the second particle trap. By cleaning the second particle trap, the probability of particles blocking the second particle trap can be reduced, thereby reducing the probability of increased exhaust back pressure caused by particles blocking the after-treatment system.

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

[0089] According to the first pressure difference being greater than the second limit value, comparing the first pressure difference with a third 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 particle trap can be judged.

[0092] If the first pressure difference is greater than the third limit value, it means that there are too many PN in the first particle trap, and the particles in the first particle trap need to be cleaned. In step S300, if the second pressure difference is greater than the first limit value, it means that there are too many PN in the second particle trap, and the particles in the second particle trap need to be cleaned. Therefore, the control triggers normal regeneration, and the particles in the first particle trap and the second particle trap can be cleaned. This can reduce the probability of particles blocking the second particle trap, thereby reducing the probability of increased exhaust back pressure caused by particles blocking the post-treatment system.

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

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

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

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

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

[0098] Based on the carbon load being greater than a fourth limit value, 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 can be further judged by the carbon load in the first particulate trap, so as to more accurately judge whether the first particulate trap needs to be cleaned.

[0100] The carbon load is greater than the fourth limit value, indicating that the particles in the first particle trap need to be cleaned. Therefore, the control triggers normal regeneration, and the particles in the first particle trap and the second particle trap can be cleaned, so as to reduce the probability of particles blocking the second particle trap, thereby reducing the probability of increased exhaust back pressure caused by particles blocking the post-treatment system.

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

[0102] Combination Figure 3 and Figure 4 As shown, in some embodiments, S400, according to the first pressure difference being greater than the second limit value, controlling the step of triggering regeneration, 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, it means that the particles in the first particle trap do not need to be cleaned, but since the second particle trap needs to be cleaned, the forced regeneration is controlled to be triggered to clean the particles in the second particle trap, which can reduce the probability of particles blocking the second particle trap, thereby reducing the probability of increased exhaust back pressure caused by particles blocking the post-treatment system. In addition, the forced regeneration can also clean the first particle trap.

[0105] Combination 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 performed, the control step comprising: controlling cleaning of the second particle trap.

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

[0108] When the first particle trap is in an abnormal state, the second particle trap traps soot particles, ash particles, urea and ammonium salt particles. Controlling the cleaning of the second particle trap can reduce the probability of particles blocking the second particle trap, thereby reducing the probability of increased exhaust back pressure caused by particles blocking the post-treatment system.

[0109] Combination 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 the first particle trap is in an abnormal state.

[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, and in response to receiving the prompt signal, the dashboard displays relevant text or icons indicating that the first particle trap is in an abnormal state, so as to send out the prompt information.

[0113] The terminal may also be a virtual terminal, for example, the terminal is a mobile client connected to the vehicle network, and the mobile client displays relevant information about the abnormal state of the first particulate trap in response to receiving the prompt signal, so as to send out the prompt information.

[0114] Combination 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 greater than the first limit value, it is determined that the state of the second particulate trap is normal.

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

[0117] The second pressure difference is 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 above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed 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 part of the steps or stages in other steps.

[0119] Based on the same inventive concept, the embodiment of the present application also provides a post-processing system control device for implementing the post-processing system control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more post-processing system control device embodiments provided below can refer to the limitations of the post-processing system control method above, and will not be repeated here.

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

[0121] a first particulate trap, a selective catalytic reduction device, a second particulate trap and a urea nozzle, wherein an outlet of the first particulate trap is communicated with an inlet of the selective catalytic reduction device, an outlet of the selective catalytic reduction device is communicated with an inlet of the second particulate trap, and the urea nozzle is connected to the inlet of the selective catalytic reduction device in an on-off 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 characterize the 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 characterize a working state of the first particle trap;

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

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

[0128] According to the first pressure difference being greater than the second limit value, comparing the first pressure difference with a third 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] According to the first pressure difference being less than or equal to a third limit value, obtaining the carbon load in the first particulate trap;

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

[0133] Based on the carbon load being greater than a fourth limit value, 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 post-processing 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 particle trap.

[0137] In some embodiments, the control step execution module is further used 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 the first particle trap is in an abnormal state.

[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 present application scheme, and does not constitute a limitation on the computer device to which the present application scheme is applied. The specific post-processing system control device may include more or fewer components than those 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, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the post-processing system control method of the above embodiment are implemented.

[0142] Furthermore, the computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output 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 the computer program in the non-volatile storage medium. The input / output 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 through a network connection. When the computer program is executed by the processor, the post-processing control method described above is implemented.

[0143] An embodiment of the present invention further proposes 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 flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be embodied in any computer-readable storage medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, apparatus, or device and execute instructions), or in conjunction with such instruction execution system, apparatus, or device. For purposes of this specification, a "computer-readable storage medium" may be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, apparatus, or device, or in conjunction with such instruction execution system, apparatus, or device. More specific examples of computer-readable storage media (a non-exhaustive list) include the following: an electrical connection with one or more wirings (electronic devices), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM, Erasable Programmable Read-Only Memory, or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM, Compact Disc Read-Only Memory). In addition, the computer-readable storage medium may even be a 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 the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA, Programmable Gate Array), a field programmable gate array (FPGA, Field Programmable Gate Array), etc.

[0146] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope 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 and a urea nozzle, wherein an outlet of the first particulate trap is communicated with an inlet of the selective catalytic reduction device, an outlet of the selective catalytic reduction device is communicated with an inlet of the second particulate trap, and the urea nozzle is connectably connected to the inlet of the selective catalytic reduction device, The post-processing system control method comprises: acquiring 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 characterize the amount of particle deposition in the second particle trap; According to the second pressure difference being greater than the first limit value, comparing the first pressure difference with a second limit value, wherein the second limit value is used to characterize a working state of the first particle trap; 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 triggering regeneration according to the first pressure difference being greater than the second limit value comprises: According to the first pressure difference being greater than the second limit value, comparing the first pressure difference with a third 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; Based on the first pressure difference being greater than the third limit value, control triggers normal regeneration.

3. The post-processing system control method according to claim 2, characterized in that: The step of controlling the regeneration triggering according to the first pressure difference being greater than the second limit value further includes: acquiring the 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 characterize the amount of carbon deposits in the first particulate trap; Based on the carbon load being greater than the fourth limit value, control triggers normal regeneration.

4. The post-processing system control method according to claim 3, characterized in that: The step of controlling the regeneration triggering 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 triggers forced regeneration.

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 particle 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 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 and a urea nozzle, wherein an outlet of the first particulate trap is communicated with an inlet of the selective catalytic reduction device, an outlet of the selective catalytic reduction device is communicated with an inlet of the second particulate trap, and the urea nozzle is connectably connected to the inlet of the selective catalytic reduction device, The post-processing system control device comprises: 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 characterize the amount of particle deposition in the second particle trap; 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 characterize a working state of the first particle trap; The control regeneration module is used to control the 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, and 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 according to any one of claims 1 to 7.

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