Choking detection method, apparatus, device, and storage medium

Abstract

The application provides a clogging detection method, device, equipment and storage medium. The method comprises the following steps: in the case that the temperature upstream of a particle trap is monotonously changed, calculating a first temperature change rate of the upstream temperature; in the case that the first temperature change rate is greater than a first temperature change rate threshold, determining a time length during which the first temperature change rate is greater than the first temperature change rate threshold; in the case that the time length is greater than a time length threshold, calculating a second temperature change rate of the temperature downstream of the particle trap; and determining whether the particle trap is clogged based on the second temperature change rate and a second temperature change rate threshold. According to the embodiments of the application, the correlation between the temperature upstream and downstream of the particle trap is used for real-time clogging detection of the particle trap, so that the situation that whether clogging occurs cannot be determined based on the pressure difference in the related art is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobiles, and particularly relates to a clogging detection method, device, equipment and storage medium. BACKGROUND

[0002] A diesel particulate filter (DPF) is used to capture engine particulate matter, thereby reducing the amount of dust emitted into the atmosphere. In order to ensure that the engine and emission system of the vehicle can operate normally and protect the environment, it is necessary to monitor the clogging condition of the DPF in real time.

[0003] At present, DPF clogging is mainly diagnosed by a differential pressure sensor, but due to the problems of insufficient accuracy of the differential pressure sensor, signal drift of the differential pressure sensor, icing of the differential pressure sensor, water ingress and the like, false positives are prone to occur. And as the clogging degree deepens, the differential pressure and its rising amplitude gradually increase, which causes the method based on the differential pressure to be unable to determine whether the DPF is clogged. SUMMARY

[0004] The application provides a clogging detection method, device, equipment and storage medium, which can solve the technical problem that whether the DPF is clogged cannot be determined in the related art.

[0005] The first aspect of the application provides a clogging detection method, comprising:

[0006] calculating a first temperature change rate of an upstream temperature of the particle trap under the condition that the upstream temperature is monotonously changed;

[0007] determining a time length during which the first temperature change rate is greater than the first temperature change rate threshold value, under the condition that the first temperature change rate is greater than the first temperature change rate threshold value;

[0008] calculating a second temperature change rate of a downstream temperature of the particle trap, under the condition that the time length is greater than a time length threshold value;

[0009] determining whether the particle trap is clogged based on the second temperature change rate and a second temperature change rate threshold value.

[0010] The second aspect of the application provides a clogging detection device, comprising:

[0011] a calculation module configured to calculate a first temperature change rate of an upstream temperature of the particle trap under the condition that the upstream temperature is monotonously changed;

[0012] a determination module configured to determine a time length during which the first temperature change rate is greater than the first temperature change rate threshold value, under the condition that the first temperature change rate is greater than the first temperature change rate threshold value;

[0013] The computing module is further configured to, in a case where the time length is greater than a time length threshold, calculate a second temperature change rate of the temperature downstream of the particle trap.

[0014] The determining module is further configured to determine whether the particle trap is blocked based on the second temperature change rate and a second temperature change rate threshold.

[0015] An embodiment of the third aspect of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the method of the first aspect.

[0016] An embodiment of the fourth aspect of the present application provides a computer readable storage medium, having a computer program stored thereon, and the program is executed by a processor to implement the method of the first aspect.

[0017] The technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0018] In the embodiments of the present application, in a case where the temperature upstream of the particle trap is monotonously changed, a first temperature change rate of the temperature upstream of the particle trap is calculated; in a case where the first temperature change rate is greater than a first temperature change rate threshold, a time length during which the first temperature change rate is greater than the first temperature change rate threshold is determined; in a case where the time length is greater than a time length threshold, a second temperature change rate of the temperature downstream of the particle trap is calculated; and whether the particle trap is blocked is determined based on the second temperature change rate and a second temperature change rate threshold. According to the embodiments of the present application, the real-time particle trap blocking detection is performed according to the correlation between the temperatures upstream and downstream of the particle trap, rather than simply determining whether the DPF is blocked based on the pressure difference sensor, so that the situation that the method based on the pressure difference in the related art cannot determine whether the DPF is blocked is avoided.

[0019] Additional aspects and advantages will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and the appended claims or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description, the accompanying drawings being included to provide a better understanding to those skilled in the art of the advantages and benefits of the application over the prior art, and of the presently preferred best mode of putting the application into practice. The accompanying drawings are included to provide a better understanding of the application, and are intended to further the purposes of exemplification.

[0021] In the drawings:

[0022] Figure 1 A flow chart of a blocking detection method provided by an embodiment of the present application is shown;

[0023] Figure 2 A flow chart of a blockage detection method is shown according to an embodiment of the present application;

[0024] Figure 3 A structural schematic diagram of a blockage detection device is shown according to an embodiment of the present application;

[0025] Figure 4 A structural schematic diagram of an electronic device is shown according to an embodiment of the present application;

[0026] Figure 5 A schematic diagram of a storage medium is shown according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided so that the present application can be more thoroughly understood and so that the scope of the present application can be accurately conveyed to those skilled in the art.

[0028] It should be noted that, unless otherwise specified, technical terms or scientific terms used in the present application should be understood as their common meanings to those skilled in the art to which the present application pertains.

[0029] The blockage detection method of the present application can be executed by a computing device, which can be a server, such as a single server, multiple servers, a server cluster, a cloud computing platform, and the like. Alternatively, the computing device can also be a terminal device, such as a mobile phone, a tablet computer, a game console, a portable computer, a desktop computer, a billboard, an all-in-one machine, and the like. The present application does not limit the type or number of computing devices.

[0030] The embodiments of the present application provide a blockage detection method, device, equipment and storage medium. The method comprises: calculating a first temperature change rate of an upstream temperature of a particle trap in a case where the upstream temperature is monotonously changing; determining a time length during which the first temperature change rate is greater than a first temperature change rate threshold in a case where the first temperature change rate is greater than the first temperature change rate threshold; calculating a second temperature change rate of a downstream temperature of the particle trap in a case where the time length is greater than a time length threshold; and determining whether the particle trap is blocked based on the second temperature change rate and a second temperature change rate threshold. The embodiments of the present application perform real-time blockage detection of the particle trap according to the correlation between the upstream and downstream temperatures of the particle trap, rather than simply determining whether the DPF is blocked based on the pressure difference sensor, thereby avoiding the situation that the method based on the pressure difference in the related art cannot determine whether the DPF is blocked.

[0031] The clogging detection method of one table is taken as an example for description in each embodiment of the present application. And for the execution subject, the computing device is taken as an example for description in each embodiment of the present application.

[0032] A clogging detection method, device, equipment and storage medium are provided according to an embodiment of the present application.

[0033] Referring to Figure 1 The method specifically comprises the following steps:

[0034] S101, in the case that the upstream temperature is monotonically changed, calculating a first temperature change rate of the upstream temperature.

[0035] The particulate trap traps and stores particulate matters in the exhaust system, and then periodically performs regeneration to remove the particulate matters.

[0036] Specifically, the main function of the particulate trap is to remove the particulate matters in the upstream gas through active regeneration or passive regeneration, so as to reduce the particulate matters in the downstream gas, thereby improving the air quality and reducing the impact on the environment.

[0037] The upstream temperature is the temperature of the upstream gas of the particulate trap, and the monotonic change can be a monotonic increase or a monotonic decrease.

[0038] It can be understood that in the case that the particulate trap is clogged, the followability of the gas from the upstream to the downstream of the particulate trap is not good, that is, in the case that the upstream temperature change rate is large, the downstream change rate is small or there is no change, therefore, the first temperature change rate of the upstream temperature needs to be calculated.

[0039] In some embodiments, the method further comprises:

[0040] In the case that the operating condition of the particulate trap meets the monitoring release condition, detecting the upstream temperature of the particulate trap, the monitoring release condition comprises at least one of the following: the ambient pressure is within a preset ambient pressure range; the ambient temperature is within a preset temperature range; the fuel level is greater than or equal to a preset level threshold; the exhaust gas volume flow is greater than a preset flow threshold and the change rate of the exhaust gas volume is less than a volume change rate threshold; the differential pressure sensor and the upstream and downstream temperature sensors of the particulate trap are normally operated; the carbon load is within a preset carbon load range.

[0041] It can be understood that in order to save the resources of the computing device, the upstream temperature is not monitored in real time, but in the case that the operating condition of the particulate trap meets the monitoring release condition, the detection of the upstream temperature is started.

[0042] And only when the upstream temperature is in the preset temperature range and the upstream temperature is in a monotonic change, can the particle trap be determined to be blocked or not blocked based on the followability of the upstream and downstream temperatures.

[0043] In some embodiments, temperature sensors can be arranged upstream and downstream of the particle trap to detect the temperatures upstream and downstream of the particle trap.

[0044] S102, in the case where the first temperature change rate is greater than the first temperature change rate threshold, determining the duration of the first temperature change rate being greater than the first temperature change rate threshold.

[0045] The first temperature change rate threshold can be flexibly set based on actual conditions.

[0046] In the case where the upstream temperature change rate is not large, even if the particle trap is not blocked, the followability of the downstream temperature is not good, or the followability of the upstream and downstream temperatures cannot be determined by the change rate of the downstream temperature. Further, the upstream temperature change time is short, and it is also difficult to determine the followability of the upstream and downstream temperatures by the change rate of the downstream temperature. Therefore, the first temperature change rate threshold needs to be set, and in the case where the first temperature change rate is greater than the first temperature change rate threshold, it is determined whether the duration of the first temperature change rate is greater than the duration of the first temperature change rate threshold.

[0047] S103, in the case where the duration is greater than the duration threshold, calculating a second temperature change rate of the downstream temperature of the particle trap.

[0048] In the case where the first temperature change rate is greater than the first temperature change rate threshold, and the duration of the first temperature change rate is greater than the duration of the first temperature change rate threshold, the particle trap can be determined to be blocked or not blocked by the second temperature change rate of the downstream temperature.

[0049] Therefore, in the case where the duration is greater than the duration threshold, the second temperature change rate of the downstream temperature of the particle trap can be calculated.

[0050] S104, determining whether the particle trap is blocked or not blocked based on the second temperature change rate and the second temperature change rate threshold.

[0051] The second temperature change rate threshold can also be flexibly set based on actual conditions.

[0052] The first temperature change rate threshold and the second temperature change rate threshold can be the same or different, which is not limited here.

[0053] It can be understood that if the particle trap is blocked, the gas flow is not good, and the first temperature change rate is greater than the second temperature change rate.

[0054] In a case where the first temperature change rate threshold and the second temperature change rate threshold are the same, in a case where the second temperature change rate is less than the second temperature change rate threshold, it is determined that the particle trap is blocked.

[0055] In a case where the first temperature change rate threshold and the second temperature change rate threshold are not the same, generally, the first temperature change rate threshold is greater than the second temperature change rate threshold because the first temperature change rate is greater than the second temperature change rate, in a case where the second temperature change rate is less than the second temperature change rate threshold, it is determined that the particle trap is blocked.

[0056] Embodiments of the present application provide a blocking detection method. In embodiments of the present application, in a case where the temperature upstream of the particle trap is monotonously changing, a first temperature change rate of the upstream temperature is calculated; in a case where the first temperature change rate is greater than a first temperature change rate threshold, a time length during which the first temperature change rate is greater than the first temperature change rate threshold is determined; in a case where the time length is greater than a time length threshold, a second temperature change rate of a temperature downstream of the particle trap is calculated; and whether the particle trap is blocked is determined based on the second temperature change rate and a second temperature change rate threshold. Embodiments of the present application perform real-time blocking detection of the particle trap according to the correlation between the upstream and downstream temperatures of the particle trap, rather than simply determining whether the DPF is blocked based on the pressure difference sensor, thereby avoiding the situation that the method based on the pressure difference in the related art cannot determine whether the DPF is blocked.

[0057] In some embodiments, the method further comprises:

[0058] detecting a pressure difference value of the pressure difference sensor;

[0059] determining whether the particle trap is blocked based on the second temperature change rate and the second temperature change rate threshold, comprising:

[0060] in a case where the pressure difference value is greater than or equal to a pressure difference threshold and the second temperature change rate is less than the second temperature change rate threshold, it is determined that the particle trap is blocked.

[0061] It can be understood that whether the particle trap is blocked can be determined based on the second temperature change rate and the second temperature change rate threshold, and whether the particle trap is blocked can also be determined based on the difference between the second temperature change rate and the second temperature change rate threshold and the pressure difference value of the pressure difference sensor.

[0062] When the particle trap is working normally, the pressure difference between the upstream and the downstream will be very small. If the particle trap is blocked, the pressure difference between the upstream and the downstream will increase because the particles cannot pass through the trap smoothly, and therefore, in a case where the pressure difference value is greater than or equal to a pressure difference threshold and the second temperature change rate is less than the second temperature change rate threshold, it is determined that the particle trap is blocked.

[0063] In some embodiments, the determination of the clogging of the particle trap in the case that the pressure difference value is greater than or equal to the pressure difference threshold value and the second temperature change rate is less than the second temperature change rate threshold value comprises:

[0064] the determination of the first-stage clogging of the particle trap in the case that the pressure difference value is greater than or equal to the first pressure difference threshold value and the second temperature change rate is less than the third temperature change rate threshold value;

[0065] the determination of the second-stage clogging of the particle trap in the case that the pressure difference value is greater than or equal to the second pressure difference threshold value less than the first pressure difference threshold value and the second temperature change rate is greater than or equal to the third temperature change rate threshold value less than the fourth temperature change rate threshold value;

[0066] the determination of the third-stage clogging of the particle trap in the case that the pressure difference value is greater than or equal to the third pressure difference threshold value less than the second pressure difference threshold value and the second temperature change rate is greater than or equal to the fourth temperature change rate threshold value less than the fifth temperature change rate threshold value.

[0067] It can be understood that the particle trap has different clogging conditions, and therefore different pressure difference threshold values and different temperature change rate threshold values can be set to determine the clogging condition of the particle trap.

[0068] The first pressure difference threshold value is less than the second pressure difference threshold value, and the second pressure difference threshold value is less than the third pressure difference threshold value. The first pressure difference threshold value, the second pressure difference threshold value and the third pressure difference threshold value can be flexibly set based on actual conditions.

[0069] The fifth temperature change rate threshold value is greater than the fourth temperature change rate threshold value, and the fourth temperature change rate threshold value is greater than the third temperature change rate threshold value. The second temperature change rate threshold value is less than or equal to the fifth temperature change rate threshold value, and the third temperature change rate threshold value, the fourth temperature change rate threshold value and the fifth temperature change rate threshold value.

[0070] It can be understood that if the particle trap is clogged, the pressure difference between the upstream and the downstream will increase, that is, the greater the pressure difference value, the more serious the clogging of the particle trap. In the case that the first temperature change rate is greater than the first temperature change rate threshold value, the smaller the second temperature change rate, the more serious the clogging of the particle trap.

[0071] Therefore, the clogging severity of the first-stage clogging is greater than that of the second-stage clogging, and the clogging severity of the second-stage clogging is greater than that of the third-stage clogging.

[0072] In some embodiments, the above method further comprises:

[0073] in the case of the first-stage clogging of the particle trap, the first-stage clogging is handled by service regeneration;

[0074] in the case of the second-stage clogging of the particle trap, the second-stage clogging is handled by parking regeneration;

[0075] In the case of three-stage clogging of the particle trap, the three-stage clogging is handled by on-the-go regeneration.

[0076] The particulate matter contained in the motive exhaust gas generally includes two components, soot and ash. Soot refers to the portion that can be burned off by regeneration, and ash refers to the non-combustible component

[0077] In the case of three-stage clogging of the particle trap, the clogging is not very serious at this time, and can be handled by on-the-go regeneration, i.e., using NO2 as an oxidizing agent to remove the particulate soot in the particulate trap and generate CO2, and NO2 is reduced to NO, thereby achieving the purpose of removing particulates.

[0078] In the case of two-stage clogging of the particle trap, the clogging cannot be handled only by on-the-go regeneration, and needs to be handled by parked regeneration, i.e., injecting diesel oil through the engine rear injection or the seventh oil injection nozzle to make the soot react at high temperature and oxygen, where the high temperature can be above 500°C.

[0079] In the case of three-stage clogging of the particle trap, the clogging is serious at this time and cannot be handled by the vehicle itself, and needs to be handled by service regeneration, i.e., the vehicle needs to be taken to a service station for dust removal.

[0080] In some embodiments, in the case where the temperature upstream of the particle trap is monotonically changing, a first temperature change rate of the upstream temperature is calculated, including:

[0081] Detecting the upstream temperature of the particle trap,

[0082] In the case where the upstream temperature is within a preset temperature range and the upstream temperature is monotonically changing, filtering the upstream temperature to obtain a target upstream temperature with stable temperature change;

[0083] Calculating a first temperature change rate of the target upstream temperature.

[0084] In some embodiments, in some cases, although the upstream temperature is within a preset temperature range and the upstream temperature is monotonically changing, due to the large difference in temperature change rate at different times within a period of time, the duration of the first temperature change rate is difficult to be greater than the duration of the first temperature change rate threshold, therefore, the upstream temperature can be filtered to obtain a target upstream temperature with stable change rate.

[0085] The filtering process of the upstream temperature can be implemented as:

[0086] Data collection: First, the temperature data upstream of the particle trap needs to be collected through sensors or other devices. These data are usually recorded in the form of time series.

[0087] Noise analysis: Perform noise analysis on the collected temperature data to understand the types and intensities of noise present in the data. This helps in selecting appropriate filtering algorithms and parameters.

[0088] Filter algorithm selection: Based on the results of noise analysis, select appropriate filtering algorithms. Common filtering algorithms include moving average filter, median filter, Kalman filter, etc.

[0089] Filtering process: Apply the selected filtering algorithm to the collected temperature data to remove noise and smooth the data. The filtering algorithm will perform weighted averaging or other processing on the data according to certain rules and parameters to obtain filtered temperature values.

[0090] Output results: The filtered temperature data is output as the result, which is used for subsequent analysis and application. These data are usually used to monitor the working state of the particle trap and adjust the engine control parameters of the vehicle.

[0091] In practical applications, the filtering process needs to be adjusted and optimized according to specific system requirements and performance indicators to ensure that the filtered data can meet the stability of the system.

[0092] Further, a third temperature change rate of the target upstream temperature is calculated, and a comparison operation between the third temperature change rate and the first temperature change rate threshold and a subsequent operation of judging whether the particle trap is blocked are performed.

[0093] In some embodiments, calculating the first temperature change rate of the upstream temperature comprises:

[0094] Differentiating the upstream temperature to obtain the first temperature change rate of the upstream temperature.

[0095] Wherein, calculating the temperature change rate of the upstream and downstream temperatures can differentiate the temperature of a period of time to obtain the temperature change rate of the upstream and downstream temperatures.

[0096] In order to describe the above-mentioned blocking detection method in detail, the embodiment of the present application provides a flowchart of a blocking detection method, as shown in Figure 2 The method comprises the following steps:

[0097] S201, the process starts.

[0098] S202, detecting whether the operating conditions of the particle trap meet the monitoring release conditions.

[0099] The monitoring release condition includes at least one of the following: the ambient pressure is within a preset ambient pressure range; the ambient temperature is within a preset temperature range; the fuel level is greater than or equal to a preset level threshold; the exhaust gas volume flow is greater than a preset flow threshold and the change rate of the exhaust gas volume is less than a volume change rate threshold; the differential pressure sensor and the upstream and downstream temperature sensors of the particulate trap are operating normally; and the carbon load is within a preset carbon load range.

[0100] If the particulate trap operating condition meets the monitoring release condition, S203 is performed to detect the upstream temperature of the particulate trap.

[0101] If the particulate trap operating condition does not meet the monitoring release condition, S203 is re-executed.

[0102] S204, in the case where the upstream temperature is within a preset temperature range and the upstream temperature is monotonically changing, filtering the upstream temperature to obtain a target upstream temperature with stable temperature change.

[0103] S205, calculating the temperature change rate of the target upstream temperature.

[0104] S206, in the case where the temperature change rate of the target upstream temperature is greater than a first temperature change rate threshold, determining the duration for which the temperature change rate of the target upstream temperature is greater than the first temperature change rate threshold.

[0105] In the case where the duration for which the temperature change rate of the target upstream temperature is greater than the first temperature change rate threshold, S207 is performed to calculate a second temperature change rate of the downstream temperature of the particulate trap.

[0106] In the case where the duration for which the temperature change rate of the target upstream temperature is not greater than the first temperature change rate threshold, S205 is re-executed.

[0107] S208, determining whether the differential pressure value of the differential pressure sensor is greater than or equal to a first differential pressure threshold and whether the second temperature change rate is less than a third temperature change rate threshold.

[0108] In the case where the differential pressure value is greater than or equal to the first differential pressure threshold and the second temperature change rate is less than the third temperature change rate threshold, S209 is performed to determine that the particulate trap is first-stage blocked.

[0109] In the case where at least one of the differential pressure value and the second temperature change rate does not meet the condition, S210 is performed to determine whether the differential pressure value is greater than or equal to a second differential pressure threshold less than the first differential pressure threshold and whether the second temperature change rate is greater than or equal to a third temperature change rate threshold less than a fourth temperature change rate threshold.

[0110] In a case where the pressure difference value is greater than or equal to the second pressure difference threshold value and less than the first pressure difference threshold value, and the second temperature change rate is greater than or equal to the third temperature change rate threshold value and less than the fourth temperature change rate threshold value, S211 is performed, and it is determined that the particle trap is in a second blockage state.

[0111] In a case where at least one of the pressure difference value and the second temperature change rate does not satisfy the condition, S212 is performed, and it is determined whether the pressure difference value is greater than or equal to the third pressure difference threshold value and less than the second pressure difference threshold value, and whether the second temperature change rate is greater than or equal to the fourth temperature change rate threshold value and less than the fifth temperature change rate threshold value.

[0112] In a case where the pressure difference value is greater than or equal to the third pressure difference threshold value and less than the second pressure difference threshold value, and the second temperature change rate is greater than or equal to the fourth temperature change rate threshold value and less than the fifth temperature change rate threshold value, S213 is performed, and it is determined that the particle trap is in a third blockage state.

[0113] In a case where at least one of the pressure difference value and the second temperature change rate does not satisfy the condition, S202 is re-executed.

[0114] S214, the process ends.

[0115] The embodiments of the present application also provide a blockage detection device, which is used to execute the blockage detection method provided in any of the above embodiments. As shown in the figure, the device comprises a calculation module 301 and a determination module 302. Figure 3

[0116] The calculation module 301 is configured to calculate a first temperature change rate of an upstream temperature of the particle trap in a case where the upstream temperature is in a monotonic change.

[0117] The determination module 302 is configured to determine a time length during which the first temperature change rate is greater than the first temperature change rate threshold value in a case where the first temperature change rate is greater than the first temperature change rate threshold value.

[0118] The calculation module 301 is further configured to calculate a second temperature change rate of a downstream temperature of the particle trap in a case where the time length is greater than a time length threshold value.

[0119] The determination module 302 is further configured to determine whether the particle trap is blocked based on the second temperature change rate and a second temperature change rate threshold value.

[0120] ​The embodiment of the present application provides a blockage detection device, the embodiment of the present application is in the case that the temperature upstream of the particle trap is monotonously changed, the first temperature change rate of the upstream temperature is calculated, in the case that the first temperature change rate is greater than the first temperature change rate threshold, the time length when the first temperature change rate is greater than the first temperature change rate threshold is determined, in the case that the time length is greater than the time length threshold, the second temperature change rate of the temperature downstream of the particle trap is calculated, and whether the particle trap is blocked is determined based on the second temperature change rate and the second temperature change rate threshold. The embodiment of the present application carries out real-time particle trap blockage detection according to the correlation of the upstream and downstream temperature changes of the particle trap, and is not simply based on the pressure difference sensor to determine whether the DPF is blocked, thereby avoiding the case that the method based on the pressure difference in the related art cannot determine whether the DPF is blocked

[0121] In some embodiments, the device further includes:

[0122] The detection module is configured to detect a pressure difference value of the pressure difference sensor.

[0123] The determination module 302 is specifically configured to:

[0124] In the case that the pressure difference value is greater than or equal to the pressure difference threshold and the second temperature change rate is less than the second temperature change rate threshold, it is determined that the particle trap is blocked.

[0125] In some embodiments, the determination module 302 is further specifically configured to:

[0126] In the case that the pressure difference value is greater than or equal to the first pressure difference threshold and the second temperature change rate is less than the third temperature change rate threshold, it is determined that the particle trap is primary blocked.

[0127] In the case that the pressure difference value is greater than or equal to the second pressure difference threshold and less than the first pressure difference threshold, and the second temperature change rate is greater than or equal to the third temperature change rate threshold and less than the fourth temperature change rate threshold, it is determined that the particle trap is secondary blocked.

[0128] In the case that the pressure difference value is greater than or equal to the third pressure difference threshold and less than the second pressure difference threshold, and the second temperature change rate is greater than or equal to the fourth temperature change rate threshold and less than the fifth temperature change rate threshold, it is determined that the particle trap is tertiary blocked.

[0129] In some embodiments, the device further includes a processing module configured to:

[0130] In the case that the particle trap is primary blocked, the primary blockage is processed through service regeneration.

[0131] In the case that the particle trap is secondary blocked, the secondary blockage is processed through parking regeneration.

[0132] In the case of the secondary blockage of the particle trap, the tertiary blockage is processed by the on-the-go regeneration.

[0133] In some embodiments, the detecting module is further configured to:

[0134] In the case that the operating condition of the particle trap meets the monitoring release condition, the upstream temperature of the particle trap is detected, and the monitoring release condition comprises at least one of the following: the ambient pressure is within a preset ambient pressure range; the ambient temperature is within a preset temperature range; the fuel level is greater than or equal to a preset level threshold; the exhaust gas volume flow is greater than a preset flow threshold and the change rate of the exhaust gas volume is less than a volume change rate threshold; the differential pressure sensor and the upstream and downstream temperature sensors of the particle trap are in normal operation; the carbon load is within a preset carbon load range.

[0135] In some embodiments, the calculating module 301 is specifically configured to:

[0136] detect the upstream temperature of the particle trap,

[0137] in the case that the upstream temperature is within a preset temperature range and the upstream temperature is monotonously changing, filter the upstream temperature to obtain a target upstream temperature with stable temperature change;

[0138] calculate a third temperature change rate of the target upstream temperature.

[0139] In some embodiments, the calculating module 301 is further specifically configured to:

[0140] differential the upstream temperature to obtain a first temperature change rate of the upstream temperature.

[0141] The embodiments of the present application also provide an electronic device for executing the above blockage detection method. Please refer to Figure 4 which shows a schematic diagram of an electronic device provided by some embodiments of the present application. As shown in Figure 4 The electronic device 5 comprises a processor 500, a memory 501, a bus 502 and a communication interface 503, the processor 500, the communication interface 503 and the memory 501 are connected through the bus 502; the memory 501 stores a computer program which can run on the processor 500, and the processor 500 executes the blockage detection method provided by any of the preceding embodiments of the present application when running the computer program.

[0142] The memory 501 can include a high-speed random access memory (RAM) and can also include a non-volatile memory such as at least one disk memory. The communication connection between the apparatus network element and at least one other network element is realized through at least one communication interface 503 (which can be wired or wireless), and the Internet, a wide area network, a local area network, a metropolitan area network, etc. can be used.

[0143] The bus 502 can be an ISA bus, a PCI bus, an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. The memory 501 is used to store programs, and the processor 500 executes the programs after receiving execution instructions. The clogging detection method disclosed in any of the embodiments of the present application can be applied to the processor 500 or implemented by the processor 500.

[0144] The processor 500 can be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method can be completed by the integrated logic circuit of hardware in the processor 500 or the instruction in the form of software. The processor 500 described above can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a ready-to-program gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. Each method, step and logic block disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as a hardware coding processor for execution, or a combination of hardware and software modules in the coding processor for execution. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, a register, etc. The storage medium in the art. The storage medium is located in the memory 501, and the processor 500 reads the information in the memory 501 and combines the hardware to complete the steps of the above method.

[0145] The electronic device provided by the embodiments of the present application and the clogging detection method provided by the embodiments of the present application have the same beneficial effects as the method they adopt, run or implement.

[0146] The embodiments of the present application also provide a computer readable storage medium corresponding to the clogging detection method provided in the foregoing embodiments. Please refer to Figure 5The computer readable storage medium shown in the figure is an optical disc 60, on which a computer program (i.e. a program product) is stored, and the computer program, when executed by a processor, performs the clogging detection method provided by any of the preceding embodiments.

[0147] It should be noted that examples of the computer readable storage medium can also include, but are not limited to, a phase change memory (PRAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), other types of random access memory (RAM), a read only memory (ROM), an electrically erasable programmable read only memory (EEPROM), a flash memory, or other optical, magnetic storage medium, which will not be listed one by one here.

[0148] The computer readable storage medium provided by the above embodiments of the present application has the same beneficial effects as the method adopted, run or implemented by the application program stored therein, based on the same inventive concept as the clogging detection method provided by the embodiments of the present application.

[0149] It should be noted that:

[0150] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some examples, well-known structures and techniques are not shown in detail in order not to obscure the understanding of the present specification.

[0151] Similarly, it should be understood that, in order to simplify the present application and help understand one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present application, various features of the present application are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be interpreted as reflecting an intention that the claimed application requires more features than those explicitly claimed in each claim. Rather, the inventive aspects are defined by the claims below, as reflected in the claims. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the present application.

[0152] In addition, those skilled in the art can understand that although some embodiments herein include certain features rather than others included in other embodiments, the combination of features of different embodiments means to be within the scope of the present application and forms different embodiments. For example, in the following claims, any one of the claimed embodiments can be used in any combination.

[0153] The above merely provides the preferred embodiments of the present application, and the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed by the present application can be easily thought by those skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A plug detection method, characterized by, The method comprises: calculating a first temperature change rate of an upstream temperature of the particle trap under the condition that the upstream temperature is monotonously changed; determining a time length during which the first temperature change rate is greater than a first temperature change rate threshold under the condition that the first temperature change rate is greater than the first temperature change rate threshold; calculating a second temperature change rate of a downstream temperature of the particle trap under the condition that the time length is greater than a time length threshold; determining whether the particle trap is blocked based on the second temperature change rate and a second temperature change rate threshold; The method further comprises: detecting a differential pressure value of a differential pressure sensor; The determination of whether the particle trap is blocked based on the second temperature change rate and a second temperature change rate threshold comprises: determining that the particle trap is blocked under the condition that the differential pressure value is greater than or equal to a differential pressure threshold and the second temperature change rate is less than a second temperature change rate threshold.

2. The method of claim 1, wherein, The determination of whether the particle trap is blocked under the condition that the differential pressure value is greater than or equal to a differential pressure threshold and the second temperature change rate is less than a second temperature change rate threshold comprises: determining that the particle trap is first blocked under the condition that the differential pressure value is greater than or equal to a first differential pressure threshold and the second temperature change rate is less than a third temperature change rate threshold; determining that the particle trap is second blocked under the condition that the differential pressure value is greater than or equal to a second differential pressure threshold less than the first differential pressure threshold and the second temperature change rate is greater than or equal to the third temperature change rate threshold less than a fourth temperature change rate threshold; determining that the particle trap is third blocked under the condition that the differential pressure value is greater than or equal to a third differential pressure threshold less than the second differential pressure threshold and the second temperature change rate is greater than or equal to the fourth temperature change rate threshold less than a fifth temperature change rate threshold.

3. The method of claim 2, wherein, The method further comprises: handling the first blocking of the particle trap by service regeneration under the condition that the particle trap is first blocked; handling the second blocking of the particle trap by parking regeneration under the condition that the particle trap is second blocked; handling the third blocking of the particle trap by driving regeneration under the condition that the particle trap is third blocked.

4. The method of claim 1, wherein, The method further comprises: detecting an upstream temperature of the particle trap under the condition that an operating condition of the particle trap meets a monitoring release condition, the monitoring release condition comprising at least one of the following: an ambient pressure being within a preset ambient pressure range; an ambient temperature being within a preset temperature range; a fuel level being greater than or equal to a preset level threshold; an exhaust gas volume flow being greater than a preset flow threshold and a change rate of the exhaust gas volume being less than a volume change rate threshold; the differential pressure sensor and upstream and downstream temperature sensors of the particle trap being in normal operation; a carbon load being within a preset carbon load range.

5. The method of claim 1, wherein, The calculation of the first temperature change rate of the upstream temperature of the particle trap under the condition that the upstream temperature is monotonously changed comprises: detecting the upstream temperature of the particle trap, filtering the upstream temperature to obtain a target upstream temperature with stable temperature change under the condition that the upstream temperature is within a preset temperature range and the upstream temperature is monotonously changed; calculating a third temperature change rate of the target upstream temperature.

6. The method according to any one of claims 1-5, characterized in that, The calculating the first temperature change rate of the upstream temperature comprises: differencing the upstream temperature to obtain the first temperature change rate of the upstream temperature.

7. A blockage detection device, characterized in that comprise: a calculating module, configured to calculate a first temperature change rate of an upstream temperature of a particle trap when the upstream temperature is monotonously changing; a determining module, configured to determine a time length during which the first temperature change rate is greater than a first temperature change rate threshold when the first temperature change rate is greater than the first temperature change rate threshold; the calculating module is further configured to calculate a second temperature change rate of a downstream temperature of the particle trap when the time length is greater than a time length threshold; a detecting module, configured to detect a differential pressure value of a differential pressure sensor; the determining module is further configured to determine that the particle trap is blocked when the differential pressure value is greater than or equal to a differential pressure threshold and the second temperature change rate is less than a second temperature change rate threshold.

8. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor runs the computer program to implement the method in any one of claims 1-6.

9. A computer readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the method in any one of claims 1-6.

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