Methods, devices, vehicles, and storage media for predicting the core temperature of GPF

Abstract

This disclosure relates to a method, apparatus, vehicle, and storage medium for predicting the center temperature of a Gas Packet Filter (GPF). The method includes: predicting the initial center temperature of the GPF at the current moment based on the current operating parameters of the vehicle engine and the center temperature of the GPF at the last shutdown; determining the temperature change trend of the GPF based on the initial center temperature and the historical center temperature of the GPF determined at the previous moment; and compensating the initial center temperature using a temperature compensation value corresponding to the temperature change trend to obtain the current center temperature of the GPF. In other words, by distinguishing between heating and cooling trends and looking up tables for different temperature change trends, and utilizing a temperature compensation value dynamically corresponding to the temperature difference, the traditional fixed-value compensation method is replaced, significantly improving the prediction accuracy of the GPF center temperature under all operating conditions. This prevents problems such as sintering and melting of the GPF due to overheating, ensuring the collection efficiency and service life of the GPF.

Description

Technical Field

[0001] This disclosure relates to the field of engines equipped with a Gasoline Particulate Filter (GPF) module, and more specifically, to a method, apparatus, vehicle, and storage medium for predicting the center temperature of a GPF. Background Technology

[0002] In related technologies, the calculation logic for the center temperature of the GPF is generally as follows: after the ECU is powered on, the ECU calculates an initial temperature after power-on based on the carrier temperature and water temperature recorded during the last shutdown, combined with the current intake air temperature, water temperature, and shutdown heat loss; the current GPF center temperature is obtained by adding the initial temperature calculated in the previous step to a fixed value.

[0003] Clearly, this method of ignoring changes in operating conditions and relying solely on fixed values ​​for GPF center temperature compensation cannot accurately reflect the real fluctuations in GPF center temperature under different operating conditions, thus resulting in significant limitations in its prediction accuracy. Summary of the Invention

[0004] In order to overcome the problems existing in the related technologies, this disclosure provides a method, apparatus, vehicle and storage medium for predicting the center temperature of a GPF.

[0005] In a first aspect, this disclosure provides a method for predicting the center temperature of a Gas Processing Unit (GPF). The method includes: predicting the initial center temperature of the GPF at the current moment based on the current operating parameters of the vehicle engine and the center temperature of the GPF at the last shutdown; determining the temperature change trend of the GPF based on the initial center temperature and the historical center temperature of the GPF determined at the previous moment; and compensating the initial center temperature using a temperature compensation value corresponding to the temperature change trend to obtain the current center temperature of the GPF.

[0006] Secondly, this disclosure provides a device for predicting the center temperature of a GPF (Gas Power Filter). The device includes: an initial temperature prediction module, used to predict the initial center temperature of the GPF at the current moment based on the current operating parameters of the vehicle engine and the center temperature of the GPF at the last shutdown; a temperature change trend determination module, used to determine the temperature change trend of the GPF based on the initial center temperature and the historical center temperature of the GPF determined at the previous moment; and a temperature compensation module, used to compensate the initial center temperature using the temperature compensation value corresponding to the temperature change trend to obtain the current center temperature of the GPF.

[0007] Thirdly, this disclosure provides a vehicle comprising: one or more processors; a memory; and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs being configured to implement the steps of the method described in the first aspect.

[0008] Fourthly, this disclosure provides a computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the steps of the method described in the first aspect.

[0009] In this disclosure, the initial center temperature of the GPF at the current moment is predicted based on the current operating parameters of the vehicle engine and the center temperature of the GPF at the last shutdown. The temperature change trend of the GPF is determined based on the initial center temperature and the historical center temperature of the GPF determined at the previous moment. The initial center temperature is compensated using the temperature compensation value corresponding to the temperature change trend to obtain the current center temperature of the GPF. In other words, by distinguishing between heating and cooling trends and looking up tables for different temperature change trends, a precise simulation of the "rapid heating and slow cooling" physical characteristic of the GPF due to thermal inertia is achieved. This utilizes a temperature compensation value dynamically corresponding to the temperature difference, replacing the traditional fixed-value compensation method, significantly improving the prediction accuracy of the GPF center temperature under all operating conditions. This prevents problems such as sintering and melting of the GPF due to overheating, ensuring the GPF's collection efficiency and service life.

[0010] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 A flowchart illustrating a method for predicting the center temperature of a GPF according to an embodiment of this application is shown.

[0012] Figure 2 A flowchart illustrating a method for predicting the center temperature of a GPF according to another embodiment of this application is shown.

[0013] Figure 3 This paper illustrates a lookup table process for GPF center temperature correction provided in an embodiment of this application.

[0014] Figure 4 This is a block diagram of a GPF center temperature prediction device according to an embodiment of this application.

[0015] Figure 5This is a block diagram of a vehicle used to perform the method for predicting the center temperature of the GPF according to an embodiment of this application.

[0016] Figure 6 This is a storage unit in this application embodiment for storing or carrying program code that implements the method for predicting the center temperature of GPF according to this application embodiment. Detailed Implementation

[0017] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0018] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0019] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0020] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0021] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below.

[0022] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0023] The inventors have proposed a method, apparatus, vehicle, and storage medium for predicting the center temperature of a Gas Permeable Powder (GPPF). The method for predicting the center temperature of a GPF provided in this application is described in detail below.

[0024] Please refer to Figure 1 , Figure 1 This is a flowchart illustrating a method for predicting the center temperature of a GPF (Geophysical Fiber Pulse) according to an embodiment of this application. The following will be combined with... Figure 1 The method for predicting the center temperature of a GPF provided in this application is described in detail. This method for predicting the center temperature of a GPF may include the following steps: Step S110: Based on the current operating parameters of the vehicle engine and the center temperature of the GPF at the last shutdown, predict the initial center temperature of the GPF at the current moment.

[0025] In this embodiment, the current operating parameters may include the engine's intake air temperature and coolant temperature (i.e., the temperature of the water heater). The center temperature of the GPF at the time of the last shutdown is also referred to as the last shutdown carrier temperature. The intake air temperature determines the starting temperature of gasoline combustion in the engine, thus affecting the engine's exhaust temperature; that is, the engine's intake air temperature can be considered the starting point of the entire temperature rise chain. The water heater temperature characterizes the thermal state of the engine body; the longer the engine runs and the greater the load, the higher the water heater temperature. Heat is transferred from the engine body to the exhaust system through the exhaust manifold. Therefore, the water heater temperature can be considered as the basic heat transferred from the engine to the exhaust. Furthermore, the heat does not disappear instantly after the vehicle engine stops. As a component with a ceramic carrier, the GPF has a large heat capacity, and its cooling is a slow process. Therefore, the last shutdown carrier temperature can also be used to reflect the residual heat of the GPF after the last shutdown.

[0026] Understandably, when predicting the initial center temperature of the GPF at the current moment, the engine intake air temperature, water temperature, and residual heat of the GPF can be regarded as independent temperature contributors. Specifically, the initial center temperature of the GPF at the current moment can be obtained by acquiring the sum of the engine intake air temperature, water temperature, and the temperature of the carrier at the last shutdown.

[0027] Step S120: Determine the temperature change trend of the GPF based on the initial center temperature and the historical center temperature of the GPF determined at the previous moment.

[0028] Specifically, the temperature difference ΔT between the initial center temperature and the historical center temperature of the GPF determined at the previous moment is obtained; if the temperature difference ΔT is greater than or equal to 0, the temperature change trend of the GPF is determined to be a rising trend; if the temperature difference ΔT is less than 0, the temperature change trend of the GPF is determined to be a falling trend.

[0029] Step S130: Compensate the initial center temperature using the temperature compensation value corresponding to the temperature change trend to obtain the current center temperature of the GPF.

[0030] In some implementations, the vehicle's ECU may pre-store a temperature rise gauge and a temperature drop gauge. The temperature rise gauge contains multiple preset temperature rise compensation values ​​and multiple temperature difference values, wherein the multiple temperature difference values ​​correspond one-to-one with the multiple preset temperature rise compensation values. Similarly, the temperature drop gauge contains multiple preset temperature drop compensation values ​​and multiple temperature difference values, wherein the multiple temperature difference values ​​correspond one-to-one with the multiple preset temperature drop compensation values.

[0031] Optionally, if the determined temperature change trend of the GPF is an upward trend, then a preset temperature rise compensation value corresponding to the temperature difference is determined from the temperature rise table and used as the aforementioned temperature compensation value; and the sum of the temperature compensation value and the initial center temperature is obtained as the current center temperature of the GPF. Understandably, the preset temperature rise compensation value is generally a positive number.

[0032] Optionally, if the determined temperature change trend of the GPF is a decreasing trend, then a preset temperature drop compensation value corresponding to the temperature difference is determined from the temperature drop table and used as the aforementioned temperature compensation value; and the sum of the temperature compensation value and the initial center temperature is obtained as the current center temperature of the GPF. Understandably, the preset temperature drop compensation value is generally a negative number.

[0033] In other words, this application achieves accurate simulation of the "rapid heating and slow cooling" physical characteristics of GPF caused by thermal inertia by distinguishing between heating and cooling trends and looking up tables for different temperature change trends. It utilizes a temperature compensation value that dynamically corresponds to the temperature difference, replacing the traditional fixed-value compensation method, and significantly improves the prediction accuracy of GPF center temperature under all operating conditions.

[0034] In other embodiments, the vehicle's ECU may pre-store a temperature rise gauge and a temperature drop gauge. The temperature rise gauge includes multiple preset temperature rise compensation values ​​and multiple first temperature ranges, wherein the multiple first temperature ranges correspond one-to-one with the multiple preset temperature rise compensation values. Similarly, the temperature drop gauge includes multiple preset temperature drop compensation values ​​and multiple second temperature ranges, wherein the multiple second temperature ranges correspond one-to-one with the multiple preset temperature drop compensation values.

[0035] Optionally, if the determined temperature change trend of the GPF is an upward trend, then a preset temperature rise compensation value corresponding to the first temperature range where the temperature difference lies is determined from the temperature rise table, and used as the aforementioned temperature compensation value; and the sum of the temperature compensation value and the initial center temperature is obtained as the current center temperature of the GPF. Understandably, the preset temperature rise compensation value is generally a positive number.

[0036] Optionally, if the determined temperature change trend of the GPF is a decreasing trend, then a preset temperature drop compensation value corresponding to the second temperature range where the temperature difference lies is determined from the temperature drop table, and used as the aforementioned temperature compensation value; and the sum of the temperature compensation value and the initial center temperature is obtained as the current center temperature of the GPF. Understandably, the preset temperature drop compensation value is generally a negative number.

[0037] Similarly, this method also utilizes a temperature compensation value that dynamically corresponds to the temperature difference, replacing the traditional fixed-value compensation method, significantly improving the prediction accuracy of the GPF center temperature under all operating conditions. Moreover, by dividing the temperature range to map the temperature compensation value, the amount of data that needs to be stored in the ECU is reduced to a certain extent, while also effectively avoiding frequent jumps in compensation values ​​caused by small fluctuations in sensor signals or noise interference, making the prediction process of the GPF center temperature smoother and more stable.

[0038] In this embodiment, firstly, the engine's operating conditions are more accurately identified based on engine speed and exhaust flow rate, thereby enabling more precise prediction of the initial center temperature of the GPF. Secondly, by distinguishing between heating and cooling trends and looking up tables for different temperature change trends, the physical characteristic of "rapid heating and slow cooling" caused by the thermal inertia of the GPF is accurately simulated. That is, a temperature compensation value dynamically corresponding to the temperature difference is used, replacing the traditional fixed-value compensation method, significantly improving the prediction accuracy of the GPF center temperature under all operating conditions. This prevents problems such as sintering and melting of the GPF due to overheating, ensuring the GPF's collection efficiency and service life.

[0039] Please refer to Figure 2 , Figure 2 This is a flowchart illustrating a method for predicting the center temperature of a GPF (Geophysical Fiber Pulse) according to another embodiment of this application. The following will be combined with... Figure 2 The method for predicting the center temperature of a GPF provided in this application is described in detail. This method for predicting the center temperature of a GPF may include the following steps: Step S210: Based on the current operating parameters of the vehicle engine and the center temperature of the GPF at the last shutdown, predict the initial center temperature of the GPF at the current moment.

[0040] In this embodiment, as Figure 3 As shown, the initial center temperature of the GPF at the current moment is first determined based on the engine's current intake air temperature, water temperature, and the temperature of the carrier at the last shutdown. The specific implementation of step S210 can be found in the aforementioned embodiments and will not be repeated here.

[0041] Step S220: Obtain temperature correction parameters, which include at least one of basic correction parameters, heat transfer correction parameters, and specific heat capacity correction parameters.

[0042] Step S230: Correct the initial center temperature based on the temperature correction parameters.

[0043] Understandably, engine speed determines the number of power strokes per unit time; the higher the speed, the more frequent the exhaust. High speed is usually accompanied by high exhaust temperature. This is because at high speeds, the heat generated by the combustion of the air-fuel mixture is released into the exhaust more concentratedly. Exhaust flow rate directly determines the mass of exhaust gas flowing through the GPF per unit time; the greater the flow rate, the greater the total heat energy (power) carried into the GPF. Even at the same temperature, a larger flow rate will cause the GPF carrier to heat up faster and reach a higher steady-state temperature.

[0044] Based on this, such as Figure 3 As shown, a basic parameter table can be pre-set in the vehicle ECU. This table includes various preset engine speeds and preset exhaust flow rates, as well as the corresponding basic correction temperature for each preset combination of engine speed and exhaust flow rate. Based on this, obtaining the basic correction parameters can specifically include: determining the corresponding basic correction temperature from the basic parameter table based on the engine's current engine speed and current exhaust flow rate; and obtaining the sum of the initial center temperature and the basic correction temperature to obtain the first center temperature. Optionally, depending on the actual situation, the initial center temperature can be corrected only based on the temperature correction parameters, that is, the initial center temperature estimated in step S210 can be corrected and calibrated based on the engine load and exhaust capacity. In this case, the first center temperature can be used as the corrected initial center temperature, and the process jumps to step S240. Of course, in addition to correcting the initial center temperature based on the temperature correction parameters, considering the influence of heat transfer, heat transfer correction parameters can be further obtained to further correct the first center temperature.

[0045] Temperature correction using heat transfer correction parameters essentially simulates the efficiency of heat transfer from exhaust gas to the GPF carrier itself. Understandably, the higher the current inlet temperature of the GPF, the higher the efficiency of heat transfer from exhaust gas to the GPF carrier, and vice versa; the current inlet temperature of the GPF can be monitored by a temperature sensor located at the GPF inlet side. Based on this, as... Figure 3As shown, a heat transfer parameter table can be pre-set in the vehicle's ECU. This table can include multiple preset inlet temperatures and multiple heat transfer correction temperatures, with each preset inlet temperature corresponding to a specific heat transfer correction temperature. Therefore, obtaining the heat transfer correction parameters specifically includes: determining the heat transfer correction temperature corresponding to the preset inlet temperature from the heat transfer parameter table based on the current inlet temperature of the GPF. Based on this, the sum of the first center temperature and the heat transfer correction temperature is obtained as the second center temperature. Optionally, depending on the actual situation, after correcting the first center temperature based on the heat transfer correction parameters, the obtained second center temperature can be used as the corrected initial center temperature, and the process can proceed to step S240. Of course, in addition to correcting the initial center temperature based on the temperature correction parameters and heat transfer correction parameters, considering that the GPF carrier has a certain mass, its temperature change will not be instantaneous but will absorb or release heat. This process is determined by the specific heat capacity of the material. Therefore, specific heat capacity correction parameters can be further obtained to further correct the second center temperature.

[0046] Specifically, the specific heat capacity of the GPF is obtained as a specific heat capacity correction parameter. This temperature change process is equivalent to a low-pass filter, which smooths out the drastic temperature fluctuations. Therefore, the product of the second center temperature and the specific heat capacity of the GPF can be obtained as the corrected initial center temperature.

[0047] In other words, this application improves the accuracy of the GPF center temperature prediction under all operating conditions by introducing basic correction parameters, heat transfer coefficient and specific heat capacity to make multifaceted corrections to the initial estimated center temperature of the GPF.

[0048] Step S240: Determine the temperature change trend of the GPF based on the corrected initial center temperature and the historical center temperature.

[0049] In this embodiment, the specific implementation of step S240 can be found in the content of the foregoing embodiments, and will not be repeated here.

[0050] Step S250: Compensate the initial center temperature using the temperature compensation value corresponding to the temperature change trend to obtain the current center temperature of the GPF.

[0051] In some implementations, such as Figure 3As shown, the vehicle's ECU can pre-store preset temperature rise and temperature drop tables. Considering that exhaust flow determines the speed and depth of heat transfer, directly affecting the dynamic process rate of temperature rise and temperature drop, exhaust flow can be introduced as a lookup parameter when setting the preset temperature rise and temperature drop tables. Specifically, both the preset temperature rise and preset temperature drop tables are essentially three-dimensional tables. The preset temperature rise table can be set to include multiple preset temperature rise compensation values, multiple preset exhaust flow rates, and multiple temperature difference values. The number of combinations of preset exhaust flow rates and temperature difference values ​​is the same as the number of preset temperature rise compensation values, and they correspond one-to-one. Similarly, the temperature drop table includes multiple preset temperature drop compensation values, multiple preset exhaust flow rates, and multiple temperature difference values. The number of combinations of preset exhaust flow rates and temperature difference values ​​is the same as the number of preset temperature drop compensation values, and they correspond one-to-one.

[0052] Optionally, if the temperature change trend is an upward trend, the temperature rise difference between the initial center temperature and the historical center temperature is obtained. Based on the temperature rise difference and the current exhaust flow rate of the engine, a preset temperature rise compensation value corresponding to the combination of preset exhaust flow rate and temperature difference is determined from a preset temperature rise table. The sum of the determined preset temperature rise compensation value and the initial center temperature is obtained as the current center temperature of the GPF.

[0053] Optionally, if the temperature change trend is a decreasing trend, then the temperature drop difference between the historical center temperature and the initial center temperature is obtained. Based on the temperature drop difference and the current exhaust flow rate of the engine, a preset temperature drop compensation value corresponding to the combination of the preset exhaust flow rate and the temperature difference is determined from a preset temperature drop table. The sum of the determined preset temperature drop compensation value and the initial center temperature is obtained as the current center temperature of the GPF.

[0054] In other embodiments, the preset temperature rise table may also include multiple preset temperature rise compensation values, multiple preset exhaust flow ranges, and multiple temperature difference ranges, wherein the number of combinations of preset exhaust flow ranges and temperature difference ranges is the same as the number of preset temperature rise compensation values, and they correspond one-to-one. Similarly, the temperature drop table includes multiple preset temperature drop compensation values, multiple preset exhaust flow ranges, and multiple temperature difference ranges, wherein the number of combinations of preset exhaust flow ranges and temperature difference ranges is the same as the number of preset temperature drop compensation values, and they correspond one-to-one.

[0055] Optionally, if the temperature change trend is an upward trend, the temperature rise difference between the initial center temperature and the historical center temperature is obtained. A preset temperature difference range within which the temperature rise difference falls is determined as the target temperature difference range, and a preset exhaust flow range for the current exhaust flow of the engine is determined as the target exhaust flow range. A preset temperature rise compensation value corresponding to the combination of the target temperature difference range and the target exhaust flow range is determined from a preset temperature rise table. The sum of the determined preset temperature rise compensation value and the initial center temperature is obtained as the current center temperature of the GPF.

[0056] Optionally, if the temperature change trend is a decreasing trend, then the temperature drop difference between the historical center temperature and the initial center temperature is obtained. A preset temperature difference range within which the temperature drop difference falls is determined as the target temperature difference range, and a preset exhaust flow range for the current exhaust flow of the engine is determined as the target exhaust flow range. A preset temperature drop compensation value corresponding to the combination of the target temperature difference range and the target exhaust flow range is determined from a preset temperature drop table. The sum of the determined preset temperature drop compensation value and the initial center temperature is obtained as the current center temperature of the GPF.

[0057] In this embodiment, firstly, the engine's operating conditions are more accurately identified based on engine speed and exhaust flow rate, thus enabling a more precise prediction of the initial center temperature of the GPF. Secondly, basic correction parameters, heat transfer coefficient, and specific heat capacity are introduced to make multifaceted corrections to the initially estimated center temperature of the GPF, further improving the accuracy of the GPF center temperature prediction under all operating conditions. Furthermore, by distinguishing between heating and cooling trends and using lookup tables for different temperature change trends, the physical characteristic of "rapid heating and slow cooling" caused by the thermal inertia of the GPF is accurately simulated. That is, a temperature compensation value dynamically corresponding to the temperature difference is used, replacing the traditional fixed-value compensation method, significantly improving the accuracy of the GPF center temperature prediction under all operating conditions. This prevents problems such as sintering and melting of the GPF due to overheating, ensuring the GPF's collection efficiency and service life. Furthermore, since the ECU's internal calculation logic also incorporates two-dimensional and three-dimensional charts, delays, and other modules, this application does not employ particularly complex mathematical calculations. By setting up two-dimensional and three-dimensional tables in the ECU, the prediction and correction of the GPF center temperature can be quickly achieved.

[0058] Please refer to Figure 4 The diagram shows a structural block diagram of a GPF center temperature prediction device 300 according to an embodiment of this application. The device 300 may include: an initial temperature prediction module 310, a temperature change trend determination module 320, and a temperature compensation module 330.

[0059] The initial temperature prediction module 310 is used to predict the initial center temperature of the GPF at the current moment based on the current operating parameters of the vehicle engine and the center temperature of the GPF at the last shutdown.

[0060] The temperature change trend determination module 320 is used to determine the temperature change trend of the GPF based on the initial center temperature and the historical center temperature of the GPF determined at the previous moment.

[0061] The temperature compensation module 330 is used to compensate the initial center temperature using the temperature compensation value corresponding to the temperature change trend, so as to obtain the current center temperature of the GPF.

[0062] Optionally, the temperature compensation module 330 can be specifically used to: if the temperature change trend is a temperature rise trend, obtain the temperature rise difference between the initial center temperature and the historical center temperature; determine the corresponding temperature rise compensation value from a preset temperature rise table based on the temperature rise difference and the current exhaust flow of the engine; and obtain the sum of the temperature rise compensation value and the initial center temperature as the current center temperature of the GPF.

[0063] Optionally, the temperature compensation module 330 can also be specifically used for: if the temperature change trend is a temperature drop trend, then obtaining the temperature drop difference between the historical center temperature and the initial center temperature; determining the corresponding temperature drop compensation value from a preset temperature drop table based on the temperature drop difference and the current exhaust flow of the engine; and obtaining the sum of the temperature drop compensation value and the initial center temperature as the current center temperature of the GPF.

[0064] Optionally, the GPF center temperature prediction device 300 may further include: a correction parameter acquisition module and a temperature correction module. The correction parameter acquisition module can be used to acquire temperature correction parameters, which include at least one of a base correction parameter, a heat transfer correction parameter, and a specific heat capacity correction parameter. The temperature correction module can be used to correct the initial center temperature based on the temperature correction parameters. The temperature change trend determination module 320 can specifically be used to determine the temperature change trend of the GPF based on the corrected initial center temperature and the historical center temperature.

[0065] Optionally, the correction parameter acquisition module can be specifically used to: determine the corresponding basic correction temperature from the basic parameter table based on the current engine speed and current exhaust flow rate. The temperature correction module can be specifically used to obtain the sum of the initial center temperature and the basic correction temperature to obtain the first center temperature.

[0066] Optionally, the correction parameter acquisition module can be specifically used to: determine the corresponding heat transfer correction temperature from the heat transfer parameter table based on the current inlet temperature of the GPF. The temperature correction module can be specifically used to obtain the sum of the first center temperature and the heat transfer correction temperature as the second center temperature.

[0067] Optionally, the specific heat capacity correction parameter includes the specific heat capacity of the GPF, and the temperature correction module can be specifically used to obtain the product of the second center temperature and the specific heat capacity of the GPF as the corrected initial center temperature.

[0068] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the above-described device and module can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0069] In the several embodiments provided in this application, the coupling between modules can be electrical, mechanical, or other forms of coupling.

[0070] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0071] In summary, this application firstly identifies the engine's operating conditions more accurately based on engine speed and exhaust flow rate, thereby achieving a more precise prediction of the initial center temperature of the GPF. Secondly, it introduces basic correction parameters, heat transfer coefficient, and specific heat capacity to make multifaceted corrections to the initially estimated center temperature of the GPF, further improving the prediction accuracy of the GPF center temperature under all operating conditions. Furthermore, by distinguishing between heating and cooling trends and using lookup tables for different temperature change trends, it achieves a precise simulation of the "rapid heating and slow cooling" physical characteristics of the GPF due to thermal inertia. That is, it utilizes a temperature compensation value dynamically corresponding to the temperature difference, replacing the traditional fixed-value compensation method, significantly improving the prediction accuracy of the GPF center temperature under all operating conditions, thereby preventing problems such as sintering and melting of the GPF due to overheating, and ensuring the GPF's collection efficiency and service life.

[0072] The following will combine Figure 5 This application describes one type of vehicle.

[0073] Reference Figure 5 , Figure 5 The diagram shows a structural block diagram of a vehicle 400 provided in an embodiment of this application. The above-described method provided in this embodiment of the application can be executed by the vehicle 400.

[0074] The vehicle 400 in this embodiment may include one or more of the following components: processor 401, memory 402, and one or more application programs, wherein the one or more application programs may be stored in memory 402 and configured to be executed by one or more processors 401, and the one or more programs are configured to perform the methods as described in the foregoing method embodiments.

[0075] Processor 401 may include one or more processing cores. Processor 401 connects to various parts within the vehicle 400 via various interfaces and lines, executing instructions, programs, code sets, or instruction sets stored in memory 402, and calling data stored in memory 402 to perform various functions and process data within the vehicle 400. Optionally, processor 401 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). Processor 401 may integrate one or more of a Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing displayed content; and the modem handles wireless communication. It is understood that the aforementioned modem can also be integrated into processor 401 and implemented using a separate communication chip.

[0076] The memory 402 may include random access memory (RAM) or read-only memory (ROM). The memory 402 can be used to store instructions, programs, code, code sets, or instruction sets. The memory 402 may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for implementing at least one function (such as touch functionality, sound playback functionality, image playback functionality, etc.), and instructions for implementing the various method embodiments described below. The data storage area may also store data created by the vehicle 400 during use (such as the various correspondences described above).

[0077] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the above-described device and module can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0078] In the several embodiments provided in this application, the coupling or direct coupling or communication connection between the modules shown or discussed may be an indirect coupling or communication connection through some interface, device or module, and may be electrical, mechanical or other forms.

[0079] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0080] Please refer to Figure 6 This diagram illustrates a structural block diagram of a computer-readable storage medium provided in an embodiment of this application. The computer-readable medium 500 stores program code that can be called by a processor to execute the methods described in the above method embodiments.

[0081] The computer-readable storage medium 500 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Optionally, the computer-readable storage medium 500 includes a non-transitory computer-readable storage medium. The computer-readable storage medium 500 has storage space for program code 510 that performs any of the method steps described above. This program code can be read from or written to one or more computer program products. The program code 510 may be compressed, for example, in a suitable form.

[0082] In some embodiments, a computer program product or computer program is provided, which includes computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the steps in the above-described method embodiments.

[0083] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0084] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0085] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A method for predicting the center temperature of a GPF (Gas Plasma Phosphate Fiber), characterized in that, The method includes: Based on the current operating parameters of the vehicle engine and the center temperature of the GPF at the last shutdown, predict the initial center temperature of the GPF at the current moment. The temperature change trend of the GPF is determined based on the initial center temperature and the historical center temperature of the GPF determined at the previous moment. The initial center temperature is compensated using the temperature compensation value corresponding to the temperature change trend to obtain the current center temperature of the GPF.

2. The method according to claim 1, characterized in that, The step of compensating the initial center temperature using the temperature compensation value corresponding to the temperature change trend to obtain the current center temperature of the GPF includes: If the temperature change trend is an upward trend, then obtain the temperature rise difference between the initial center temperature and the historical center temperature; Based on the temperature rise difference and the current exhaust flow of the engine, determine the corresponding temperature rise compensation value from the preset temperature rise table; The sum of the temperature rise compensation value and the initial center temperature is obtained and used as the current center temperature of the GPF.

3. The method according to claim 2, characterized in that, The step of compensating the initial center temperature based on the temperature compensation value corresponding to the temperature change trend to obtain the current center temperature of the GPF further includes: If the temperature change trend is a decreasing trend, then obtain the temperature drop difference between the historical center temperature and the initial center temperature; Based on the temperature drop difference and the current exhaust flow of the engine, determine the corresponding temperature drop compensation value from the preset temperature drop table; The sum of the temperature drop compensation value and the initial center temperature is obtained and used as the current center temperature of the GPF.

4. The method according to any one of claims 1-3, characterized in that, After predicting the initial center temperature of the GPF at the current moment based on the engine's current operating parameters and the center temperature of the GPF at the time of the last shutdown, the method further includes: Obtain temperature correction parameters, which include at least one of basic correction parameters, heat transfer correction parameters, and specific heat capacity correction parameters; The initial center temperature is corrected based on the temperature correction parameters. The step of determining the temperature change trend of the GPF based on the initial center temperature and the historical center temperature of the GPF determined at the previous moment includes: The temperature change trend of the GPF is determined based on the corrected initial center temperature and the historical center temperature.

5. The method according to claim 4, characterized in that, Obtaining the basic correction parameters includes: Based on the engine's current speed and current exhaust flow rate, determine the corresponding base correction temperature from the base parameter table; The step of correcting the initial center temperature based on the temperature correction parameter includes: The sum of the initial center temperature and the base correction temperature is obtained to obtain the first center temperature.

6. The method according to claim 5, characterized in that, Obtaining the heat transfer correction parameters includes: Based on the current inlet temperature of the GPF, determine the corresponding heat transfer correction temperature from the heat transfer parameter table; The correction of the initial center temperature based on the correction parameters includes: The sum of the first center temperature and the heat transfer correction temperature is obtained as the second center temperature.

7. The method according to claim 6, characterized in that, The specific heat capacity correction parameter includes the specific heat capacity of the GPF; The correction of the initial center temperature based on the correction parameters includes: The product of the second center temperature and the specific heat capacity of the GPF is obtained as the corrected initial center temperature.

8. A device for predicting the center temperature of a GPF (Gas Plasma Phosphate Fiber), characterized in that, The device includes: The initial temperature prediction module is used to predict the initial center temperature of the GPF at the current moment based on the current operating parameters of the vehicle engine and the center temperature of the GPF at the time of the last shutdown. The temperature change trend determination module is used to determine the temperature change trend of the GPF based on the initial center temperature and the historical center temperature of the GPF determined at the previous moment. The temperature compensation module is used to compensate the initial center temperature using the temperature compensation value corresponding to the temperature change trend, so as to obtain the current center temperature of the GPF.

9. A vehicle, characterized in that, The vehicles include: One or more processors; Memory; One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs being configured to perform the method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores program code that can be invoked by a processor to perform the method as described in any one of claims 1 to 7.

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