Post-processing Emission Monitoring Method, Device and Vehicle

Abstract

The present invention provides a post-treatment emission monitoring method, device and vehicle. The post-treatment emission monitoring method includes the steps of: receiving a particulate matter mass signal of a post-treatment system; calculating a particulate matter quantity value according to the particulate matter mass signal; determining whether the particulate matter emission of the post-treatment system exceeds the standard according to the particulate matter quantity value; and correcting engine combustion parameters according to the fact that the particulate matter emission of the post-treatment system exceeds the standard. The post-treatment emission monitoring method provided by the present invention obtains real-time particulate matter emission conditions based on the signals of a particulate matter mass sensor measured in real time, judges the risk of exceeding the emission standard according to the particulate matter emission conditions, and if there is a risk, timely reduces the PN emission through corrective measures such as correcting engine combustion parameters, and has stronger immediacy in evaluating whether the particulate matter emission of the post-treatment system exceeds the standard.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular, to a post-treatment emission monitoring method, a post-treatment emission monitoring device, and a vehicle. Background Art

[0002] The information provided in this section is only background information related to the present disclosure, and it is not necessarily prior art.

[0003] In a diesel engine post-treatment system, a DPF (Diesel Particulate Filter) is required to reduce engine particulate emissions and PN emissions. According to regulatory requirements, the DPF trapping efficiency needs to be monitored in real time, and at the same time, the PN emissions need to meet the requirements. Currently, there are advanced PM (Particulate Matter) sensors that can measure PM emissions in real time, but there is no device for real-time measurement of PN (Particulate Number) emissions. For DPFs with precious metals, when the post-treatment temperature and the DPF carbon loading reach a certain value and the passive regeneration reaction is strong, the trapping efficiency of the DPF for PN will decrease, and it is very easy to have the problem of excessive particulate emissions.

[0004] The prior art evaluates PN emissions based on DPF carbon loading and ash loading, and cannot obtain real-time PN emissions. Moreover, there is a certain delay between PN emissions and DPF carbon loading or ash loading. When the passive regeneration reaction of the DPF increases and the trapping efficiency of PN begins to decrease, the changes in carbon loading or ash loading cannot be reflected in a timely manner, and the risk of PN emissions cannot be predicted in a timely manner. Moreover, when there are deviations in the accuracy of the DPF carbon loading or ash loading model, there is a risk of misjudgment. Summary of the Invention

[0005] The object of the present invention is to at least solve the technical problem that the existing particulate number emission monitoring method of the post-treatment system cannot predict the risk of PN emissions in a timely manner. This object is achieved by the following technical solutions:

[0006] A first aspect of the present invention provides a post-treatment emission monitoring method, including the following steps:

[0007] Receiving a particulate matter mass signal of a post-treatment system;

[0008] Calculating a particulate number value according to the particulate matter mass signal;

[0009] Judging whether the particulate emissions of the post-treatment system exceed the standard according to the particulate number value;

[0010] Correcting engine combustion parameters according to the particulate emissions of the post-treatment system exceeding the standard.

[0011] The post - treatment emission monitoring method proposed by the present invention obtains real - time particulate matter number emissions based on the signals of a particulate matter mass sensor measured in real time. It judges the risk of excessive emissions according to the particulate matter number emissions. If there is a risk, it timely reduces the PN emissions through corrective measures such as engine combustion parameter correction, and has stronger immediacy in evaluating whether the particulate matter emissions of the post - treatment system exceed the standard.

[0012] In addition, according to the post - treatment emission monitoring method of the present invention, the following additional technical features may also be included:

[0013] In some embodiments of the present invention, the step of calculating the particulate matter number value according to the particulate matter mass signal includes:

[0014] Invoking the relationship map between particulate matter mass and particulate matter number value, the preset gas volume correction map, the preset temperature correction map, and the ammonia leakage correction map;

[0015] Calculating an initial particulate matter number value based on the particulate matter mass signal according to the relationship map;

[0016] Correcting the initial particulate matter number value based on the preset gas volume correction map, the preset temperature correction map, and the ammonia leakage correction map, and obtaining the particulate matter number value.

[0017] In some embodiments of the present invention, before the step of receiving the particulate matter mass signal of the post - treatment system, the following steps are further included:

[0018] Receiving an engine power signal;

[0019] Executing the step of receiving the particulate matter mass signal of the post - treatment system according to the engine power signal satisfying a preset condition.

[0020] In some embodiments of the present invention, before the step of receiving the engine power signal, the following steps are further included:

[0021] Receiving an engine speed signal;

[0022] Receiving an ambient temperature signal;

[0023] Receiving an ambient pressure signal;

[0024] Executing the step of receiving the engine power signal according to the engine speed signal being within a preset speed range, the ambient temperature signal being within a preset ambient temperature range, and the ambient pressure being within a preset ambient pressure range.

[0025] In some embodiments of the present invention, the step of judging whether the particulate matter emissions of the post - treatment system exceed the standard according to the particulate matter number value includes:

[0026] Calculate the change rate of the particulate matter quantity value according to the particulate matter quantity value;

[0027] Judge that the particulate matter quantity emission of the post-treatment system exceeds the standard according to that the particulate matter quantity value is greater than a preset quantity value and / or the change rate of the particulate matter quantity value is greater than a preset change rate.

[0028] In some embodiments of the present invention, the step of correcting the engine combustion parameters according to the particulate matter emission exceeding the standard of the post-treatment system includes:

[0029] Accumulate the number of times that the particulate matter quantity value is greater than the preset quantity value and the number of times that the change rate of the particulate matter quantity value is greater than the preset change rate;

[0030] Correct the engine combustion parameters according to that the accumulated number of times is less than or equal to the preset number of times.

[0031] In some embodiments of the present invention, the step of correcting the engine combustion parameters according to the particulate matter emission exceeding the standard of the post-treatment system further includes:

[0032] Send out a signal that the particulate matter emission of the post-treatment system exceeds the standard according to that the accumulated number of times is greater than the preset number of times.

[0033] In some embodiments of the present invention, the engine combustion parameters include at least one of rail pressure, engine advance angle, and exhaust volume.

[0034] The second aspect of the present invention provides a post-treatment emission monitoring device for implementing the post-treatment emission monitoring method proposed in the first aspect of the present invention, including:

[0035] A monitoring unit for monitoring the particulate matter mass of the post-treatment system;

[0036] A calculation unit for calculating the particulate matter quantity value according to the monitoring signal of the monitoring unit;

[0037] A judgment unit for judging whether the particulate matter emission of the post-treatment system exceeds the standard according to the particulate matter quantity value;

[0038] A control unit for controlling the operating conditions of the engine according to the judgment result of the judgment unit.

[0039] The post-treatment emission monitoring device proposed in the second aspect of the present invention obtains the initial particulate matter quantity value based on the particulate matter mass of the monitoring unit, obtains the real-time particulate matter quantity value after a series of corrections, judges the particulate matter quantity value, evaluates the risk of particulate matter emission exceeding the standard, and actively adjusts the operating conditions of the engine based on the evaluation result to achieve the purpose of meeting the requirements of real-time PN emission.

[0040] A third aspect of the present invention provides a vehicle, including the post-treatment emission monitoring device proposed in the second aspect of the present invention.

[0041] The vehicle proposed in the third aspect of the present invention has the same beneficial effects as the post-treatment emission monitoring device proposed in the second aspect of the present invention, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components.

[0043] In the drawings:

[0044] Figure 1 Schematically shows a flowchart of the post-treatment emission monitoring method according to an embodiment of the present invention;

[0045] Figure 2 Schematically shows a logical diagram of the post-treatment emission monitoring method according to an embodiment of the present invention;

[0046] Figure 3 Schematically shows a structural diagram of the post-treatment emission monitoring device according to an embodiment of the present invention;

[0047] The reference numerals are as follows:

[0048] 10: ECU;

[0049] 20: Post-treatment system;

[0050] 30: Post-treatment emission monitoring device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0051] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0052] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, 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 particular order described or illustrated, unless an execution order is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0053] Although the terms first, second, third, etc. may be used herein 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 may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly dictates otherwise, terms such as "first", "second", and other numerical terms when used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0054] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such as "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include 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 will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are interpreted accordingly.

[0055] As Figure 1 shown, a first aspect of the present invention provides a post - treatment emission monitoring method, including the following steps:

[0056] S100: Receive the particulate matter mass signal of the post - treatment system;

[0057] S200: Calculate the particulate matter quantity value based on the particulate matter mass signal;

[0058] S300: Determine whether the particulate matter emission of the aftertreatment system exceeds the standard according to the particulate matter quantity value;

[0059] S400: Modify the engine combustion parameters according to the fact that the particulate matter emission of the aftertreatment system exceeds the standard.

[0060] It can be understood that the diesel engine aftertreatment system mainly includes parts such as SCR, DPF, DOC, and urea pump, mainly aiming to reduce NOx and particulate matter in the engine exhaust gas. The particulate matter mass sensor is located after the aftertreatment and is used to measure the particulate matter mass emission in the exhaust gas in real time. After obtaining the particulate matter mass signal, the real-time particulate matter quantity value can be calculated based on the relationship diagram between the particulate matter quantity value calibrated by the engine and the particulate matter mass according to the particulate matter mass signal. This relationship diagram can be obtained through the engine data acquisition under various working conditions in the engine test. After obtaining the real-time particulate matter quantity value, it can be analyzed and judged. For example, when the particulate matter quantity value exceeds the limit, it can be determined that the particulate matter emission of the aftertreatment system exceeds the standard. At this time, the combustion parameters of the engine can be controlled to make the particulate matter emission meet the requirements.

[0061] The aftertreatment emission monitoring method proposed by the present invention obtains the real-time particulate matter quantity value emission based on the real-time measured particulate matter mass sensor signal, judges the risk of exceeding the emission standard according to the particulate matter quantity value emission. If there is a risk, the PN emission is reduced in time through corrective measures such as modifying the engine combustion parameters, and the timeliness of evaluating whether the particulate matter emission of the aftertreatment system exceeds the standard is stronger.

[0062] In some embodiments of the present invention, the step of calculating the particulate matter quantity value according to the particulate matter mass signal includes:

[0063] Call the relationship diagram between particulate matter mass and particulate matter quantity value, the preset gas volume correction diagram, the preset temperature correction diagram, and the ammonia leakage correction diagram;

[0064] Calculate the initial particulate matter quantity value based on the particulate matter mass signal according to the relationship diagram;

[0065] Modify the initial particulate matter quantity value based on the preset gas volume correction diagram, the preset temperature correction diagram, and the ammonia leakage correction diagram to obtain the particulate matter quantity value.

[0066] Specifically, the relationship map between particulate matter mass and particulate matter number value can be obtained based on the data calibrated by the engine. This relationship map between particulate matter mass and particulate matter number value is obtained through tests in engine calibration tests or bench tests, and can reflect the corresponding relationship between particulate matter mass and particulate matter number value under various working conditions. Substituting the real-time monitored particulate matter mass can obtain the initial particulate matter number value. Due to various influences of the engine working conditions, the accuracy of the particulate matter number value at this time needs to be corrected. The initial particulate matter number value can be corrected according to the preset air volume correction map, preset temperature correction map, and ammonia leakage correction map pre-stored in the vehicle computer. The preset air volume correction map is the corresponding correction coefficient map between the exhaust gas volume and the particulate matter number value in engine calibration. The preset temperature correction map is the corresponding correction coefficient map between the temperature and the particulate matter number value in engine calibration. The ammonia leakage correction map is the corresponding correction coefficient map between the ammonia leakage amount and the particulate matter number value in engine calibration. Using the correction coefficient obtained by looking up the table to correct the initial particulate matter number value can improve the accuracy of the particulate matter number value calculation.

[0067] In some embodiments of the present invention, before the step of receiving the particulate matter mass signal of the after-treatment system, there is also a step of:

[0068] Receiving an engine power signal;

[0069] According to the engine power signal satisfying a preset condition, perform the step of receiving the particulate matter mass signal of the after-treatment system.

[0070] Specifically, in the case where the particulate matter number value exceeds the limit, it is also necessary to make a judgment in combination with the power of the engine. The engine power can be calculated based on the engine torque and engine speed, and specifically, the existing engine power calculation method can be referred to. Integrate the power of the engine over a period of time. When the integration result satisfies a preset condition, for example, when the integration result is greater than a preset integration value, it can be inferred that the engine is operating normally. At this time, the after-treatment particulate emissions can be further monitored.

[0071] In some embodiments of the present invention, before the step of receiving the particulate matter mass signal of the after-treatment system, there is also a step of:

[0072] Receiving an engine speed signal, an ambient temperature signal, and an ambient pressure signal;

[0073] According to the engine speed signal being within a preset speed range, the ambient temperature signal being within a preset ambient temperature range, and the ambient pressure being within a preset ambient pressure range, perform the step of receiving the engine power signal.

[0074] It can be understood that the engine speed signal can be obtained by a speed sensor, the ambient temperature signal can be obtained according to a temperature sensor, and the ambient pressure can be obtained according to a barometric pressure sensor. When the engine speed is within a certain range (such as not in the idle state), the ambient temperature is within a certain range (such as -7 - 60 °C), and the ambient pressure is within a certain range (such as 800 - 1100 hPa), the enabling conditions for monitoring the particulate matter quantity value emissions can be considered satisfied, and at this time, the monitoring of the particulate matter quantity value emissions can be carried out.

[0075] In some embodiments of the present invention, the steps of determining whether the aftertreatment system has exceeded the particulate matter emissions standard according to the particulate matter quantity value include:

[0076] Calculate the change rate of the particulate matter quantity value based on the particulate matter quantity value;

[0077] Determine that the particulate matter quantity emissions of the aftertreatment system exceed the standard based on the particulate matter quantity value being greater than a preset quantity value and / or the change rate of the particulate matter quantity value being greater than a preset change rate.

[0078] It can be understood that during the real-time calculation of the particulate matter quantity value, a time period can be selected to calculate the change rate of the particulate matter quantity value within the time period. When the particulate matter quantity value is greater than the preset quantity value or the change rate of the particulate matter quantity value is greater than the preset change rate, it indicates that the particulate matter emissions of the aftertreatment system exceed the standard, and further intervention processing needs to be carried out on the engine or the aftertreatment system, such as adjusting the engine operating parameters or checking the DPF status, etc.

[0079] In some embodiments of the present invention, the steps of correcting the engine combustion parameters according to the particulate matter emissions exceeding the standard of the aftertreatment system include:

[0080] Accumulate the number of times that the particulate matter quantity value is greater than the preset quantity value and the change rate of the particulate matter quantity value is greater than the preset change rate;

[0081] Correct the engine combustion parameters according to the accumulated number of times being less than or equal to the preset number of times.

[0082] Specifically, when the accumulated number of times that the particulate matter quantity value is greater than the preset quantity value and the change rate of the particulate matter quantity value is greater than the preset change rate is relatively small, it can be inferred that the aftertreatment system does not continuously exceed the emissions standard or the degree of exceeding the emissions standard is relatively light. Furthermore, it can be known that the reason for exceeding the emissions standard may be related to the operating conditions of the engine. At this time, the combustion parameters of the engine can be adjusted in real time, such as the intake and exhaust volume, rail pressure, etc. By adjusting the combustion parameters of the engine that affect emissions, the emissions of the aftertreatment system can be made to meet the standards.

[0083] In some embodiments of the present invention, the steps of correcting the engine combustion parameters according to the particulate matter emissions exceeding the standard of the aftertreatment system further include:

[0084] When the cumulative number is greater than the preset number, an over-standard signal for particulate matter emissions from the aftertreatment system is sent.

[0085] It can be understood that when the cumulative number of particulate matter quantity values greater than the preset quantity value and the change rate of particulate matter quantity values greater than the preset change rate is greater than the preset number, it can be reflected that the over-standard degree of emissions from the aftertreatment system is relatively large, and there may be a situation of aftertreatment system failure. At this time, an over-standard signal for particulate matter emissions from the aftertreatment system is sent to remind the driver that the emissions from the aftertreatment system are seriously over-standard and need to be shut down for inspection.

[0086] In some embodiments of the present invention, the engine combustion parameters include at least one of rail pressure, engine advance angle, and exhaust volume.

[0087] Specifically, by adjusting the rail pressure, for example, adjusting the rail pressure, the exhaust temperature of the engine can be increased, thereby enabling the aftertreatment to regenerate in advance and improving the particulate matter capture efficiency of the aftertreatment. The aftertreatment can also be regenerated in advance by adjusting the engine advance angle and exhaust volume.

[0088] As Figure 2 shown, the logical flow of the aftertreatment emission monitoring method proposed in the first aspect of the present invention is as follows:

[0089] First, it is judged whether the enabling conditions of the whole vehicle are met, such as whether the engine rail pressure, exhaust volume, ambient temperature, etc. are within the preset range. When the above enabling conditions are met, further monitoring of particulate matter emissions is carried out. First, the engine power is integrated. When the integration meets the preset power condition, the initial particulate matter quantity value is calculated according to the particulate matter mass signal collected by the PM sensor. Then, by calling the pre-stored correction map, the initial particulate matter quantity value is corrected according to the various working condition signals collected under the enabling conditions in the map to obtain the corrected particulate matter quantity value. Then, the change rate of the effective value of the particulate matter quantity is calculated from the corrected particulate matter quantity value. Combining the two calculation results, when the particulate matter quantity value or the change rate of the particulate matter quantity value exceeds the limit, the cumulative number of times of the particulate matter quantity value exceeding the limit is calculated. If the cumulative number exceeds the limit, an over-standard signal for the particulate matter quantity value is sent. If the cumulative number does not exceed the limit, a signal for correcting the engine combustion parameters is sent, such as adjusting the rail pressure, advance angle, etc., so that the particulate matter emissions are within the normal range by correcting the engine combustion parameters.

[0090] As Figure 3 shown, a second aspect of the present invention proposes an aftertreatment emission monitoring device 30 for implementing the aftertreatment emission monitoring method proposed in the first aspect of the present invention, including:

[0091] A monitoring unit for monitoring the particulate matter mass of the aftertreatment system 20;

[0092] A calculation unit for calculating the particulate matter quantity value according to the monitoring signal of the monitoring unit;

[0093] A judgment unit for judging whether the particulate matter emission of the aftertreatment system 20 exceeds the standard according to the particulate matter quantity value;

[0094] A control unit for controlling the operating condition of the engine according to the judgment result of the judgment unit.

[0095] It can be understood that the monitoring unit may include various sensors arranged on the engine and the aftertreatment system 20, such as a speed sensor, a temperature sensor, a PM sensor, etc. The calculation unit, the judgment unit and the control unit can be integrated with the ECU 10.

[0096] The aftertreatment emission monitoring device 30 proposed in the second aspect of the present invention obtains an initial particulate matter quantity value based on the particulate matter mass signal of the monitoring unit, obtains a real-time particulate matter quantity value after a series of corrections, judges the particulate matter quantity value, evaluates the risk of particulate matter emission exceeding the standard, and actively adjusts the operating condition of the engine based on the evaluation result, so as to achieve the purpose of meeting the requirements of real-time PN emission.

[0097] In the embodiment of the present invention, the control module is a processor. Among them, the processor can be an integrated circuit chip with signal processing capabilities. The processor can be a general-purpose processor, a digital signal processor (DSP for short), an application specific integrated circuit (ASIC for short), a field programmable gate array (FPGA for short), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0098] It can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present invention can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, register, etc. The processor reads the information in the storage medium and combines its hardware to complete the steps of the above method.

[0099] The storage medium can be a memory, for example, it can be a volatile memory or a non-volatile memory, or it can include both volatile and non-volatile memories.

[0100] Among them, the non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory.

[0101] The volatile memory can be a Random Access Memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM).

[0102] The storage media described in the embodiments of the present invention are intended to include, but are not limited to, these and any other suitable types of memory.

[0103] Those skilled in the art should be able to realize that, in one or more of the above examples, the functions described in the present invention can be implemented by a combination of hardware and software. When applying software, the corresponding functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. The computer-readable medium includes computer storage media and communication media, where the communication media includes any medium that facilitates the transfer of a computer program from one place to another. The storage media can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0104] A third aspect of the present invention proposes a vehicle, including the post-treatment emission monitoring device proposed in the second aspect of the present invention.

[0105] The vehicle proposed in the third aspect of the present invention has the same beneficial effects as the post-treatment emission monitoring device proposed in the second aspect of the present invention, and will not be elaborated herein.

[0106] As described above, it is only the 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 those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A post-treatment emission monitoring method, characterized in that, Comprising the following steps: Receiving a particulate matter mass signal of a post-treatment system; Calculating a particulate matter quantity value according to the particulate matter mass signal; Judging whether the particulate matter emission of the post-treatment system exceeds the standard according to the particulate matter quantity value; Correcting the engine combustion parameters according to the particulate matter emission of the post-treatment system exceeding the standard; The step of calculating the particulate matter quantity value according to the particulate matter mass signal includes: Invoking a relationship map between particulate matter mass and particulate matter quantity value, a preset gas volume correction map, a preset temperature correction map, and an ammonia leakage correction map; Calculating an initial particulate matter quantity value based on the particulate matter mass signal according to the relationship map; Correcting the initial particulate matter quantity value based on the preset gas volume correction map, the preset temperature correction map, and the ammonia leakage correction map, and obtaining the particulate matter quantity value; The step of judging whether the particulate matter emission of the post-treatment system exceeds the standard according to the particulate matter quantity value includes: Calculating a change rate of the particulate matter quantity value according to the particulate matter quantity value; Judging that the particulate matter emission of the post-treatment system exceeds the standard according to the particulate matter quantity value being greater than a preset quantity value and / or the change rate of the particulate matter quantity value being greater than a preset change rate; The step of correcting the engine combustion parameters according to the particulate matter emission of the post-treatment system exceeding the standard includes: Accumulating the number of times that the particulate matter quantity value is greater than the preset quantity value and the number of times that the change rate of the particulate matter quantity value is greater than the preset change rate; Correcting the engine combustion parameters according to the accumulated number of times being less than or equal to a preset number of times.

2. The post-treatment emission monitoring method according to claim 1, wherein Before the step of receiving the particulate matter mass signal of the post-treatment system, there is also a step: Receiving an engine power signal; Executing the step of receiving the particulate matter mass signal of the post-treatment system according to the engine power signal satisfying a preset condition.

3. The post-treatment emission monitoring method according to claim 2, wherein Before the step of receiving the engine power signal, there is also a step: Receiving an engine speed signal; Receiving an ambient temperature signal; Receiving an ambient pressure signal; Executing the step of receiving the engine power signal according to the engine speed signal being within a preset speed range, the ambient temperature signal being within a preset ambient temperature range, and the ambient pressure being within a preset ambient pressure range.

4. The post-treatment emission monitoring method according to claim 1, wherein The step of correcting the engine combustion parameters according to the particulate matter emission of the post-treatment system exceeding the standard further includes: Sending a particulate matter emission exceeding the standard signal of the post-treatment system according to the accumulated number of times being greater than a preset number of times.

5. The post-treatment emission monitoring method according to any one of claims 1 to 4, characterized in that, The engine combustion parameters include at least one of rail pressure, engine advance angle, and exhaust volume.

6. A post-treatment emission monitoring device for implementing the post-treatment emission monitoring method according to any one of claims 1 to 5, characterized in that, Including: A monitoring unit for monitoring the particulate matter mass of the post-treatment system; A calculation unit for invoking a relationship map between particulate matter mass and particulate matter quantity value, a preset gas volume correction map, a preset temperature correction map, and an ammonia leakage correction map, calculating an initial particulate matter quantity value based on the particulate matter mass signal according to the relationship map, correcting the initial particulate matter quantity value based on the preset gas volume correction map, the preset temperature correction map, and the ammonia leakage correction map, and obtaining the particulate matter quantity value; A judgment unit, configured to calculate a change rate of the particulate matter quantity value according to the particulate matter quantity value, and determine that the particulate matter emission of the aftertreatment system exceeds the standard according to the particulate matter quantity value being greater than a preset quantity value and / or the change rate of the particulate matter quantity value being greater than a preset change rate; A control unit, configured to accumulate the number of times that the particulate matter quantity value is greater than a preset quantity value and the number of times that the change rate of the particulate matter quantity value is greater than a preset change rate, and correct the engine combustion parameters according to the accumulated number of times being less than or equal to a preset number of times.

7. A vehicle, characterized in that, including; an aftertreatment system; an aftertreatment emission monitoring device, where the aftertreatment emission monitoring device is the aftertreatment emission monitoring device according to claim 6, and the aftertreatment emission monitoring device is configured to monitor the particulate matter emission condition of the aftertreatment system.

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