A method, device and equipment for detecting removal of a DPF, and a storage medium

Abstract

The application discloses a DPF removal detection method, device, equipment and storage medium, and aims to solve the technical problem of how to accurately detect whether the DPF is removed. The method comprises the following steps: acquiring a temperature change curve of the upstream and downstream of the DPF in the cooling stage of the parking regeneration of the diesel engine, and determining an initial temperature of the downstream of the DPF in the cooling stage; determining a time interval from the initial temperature to a preset temperature threshold of the downstream of the DPF based on the temperature change curve of the upstream and downstream in the cooling stage, and determining a heat release amount of the upstream and downstream temperature in a preset difference range; and analyzing whether the DPF is removed based on the time interval and the heat release amount. The application realizes accurate detection of whether the DPF is removed through the above method.

Description

Technical Field

[0001] This application relates to the field of diesel particulate filter technology, and in particular to a method, apparatus, device and storage medium for detecting the removal of DPF. Background Technology

[0002] With increasingly stringent emission regulations, standards for engines and emission systems are gradually rising. To meet the particulate matter reduction targets of China VI diesel vehicles, a Diesel Particulate Filter (DPF) is required. The DPF is the most effective means of addressing diesel engine particulate matter, ensuring that particulate matter emissions from diesel vehicles remain at a low level. However, as particulate matter accumulates, exhaust back pressure increases, affecting engine performance and increasing fuel consumption. Therefore, there are instances where the DPF carrier has been removed, resulting in vehicles failing to meet emission regulations.

[0003] Currently, there is existing technology CN112211705A for monitoring DPF removal. The method includes: acquiring the current upstream and downstream temperatures of the DPF; calculating the temperature difference based on the current upstream and downstream temperatures; and determining that the DPF is in a removed state if the temperature difference is not greater than a preset temperature value. However, during vehicle operation, the upstream and downstream temperatures of the DPF may exhibit two scenarios: the upstream temperature is higher than the downstream temperature, and vice versa. Furthermore, the operating conditions during vehicle operation are complex, and the upstream and downstream temperature difference may be large or small, and may be positive or negative, making it difficult to report DPF removal or resulting in false alarms.

[0004] Therefore, how to accurately detect whether the DPF has been removed has become an urgent technical problem to be solved. Summary of the Invention

[0005] This application provides a method, apparatus, device, and storage medium for detecting the removal of DPF, in order to solve the following technical problem: how to accurately detect whether a DPF has been removed.

[0006] In a first aspect, embodiments of this application provide a method for detecting the removal of a Diesel Particulate Filter (DPF). The method includes: acquiring temperature change curves of the upstream and downstream sides of the DPF during the parking regeneration cooling phase of a diesel engine, and determining the initial temperature downstream of the DPF during the cooling phase; determining the time interval from the initial temperature to a preset temperature threshold downstream of the DPF based on the temperature change curves of the upstream and downstream sides during the cooling phase, and determining the heat release within a preset temperature difference range between the upstream and downstream sides; and analyzing whether the DPF has been removed based on the time interval and the heat release.

[0007] In one implementation of this application, determining the initial temperature downstream of the DPF during the cooling phase specifically includes: determining the start time of the cooling phase of the diesel engine in parking regeneration mode; and determining the initial temperature downstream of the DPF during the cooling phase based on the start time in the temperature change curve.

[0008] In one implementation of this application, determining the time interval from the initial temperature to the preset temperature threshold downstream of the DPF specifically includes: determining the time to be calculated corresponding to the DPF downstream reaching the preset temperature threshold in the temperature change curve; and determining the time interval from the initial temperature to the preset temperature threshold downstream of the DPF based on the time to be calculated and the start time.

[0009] In one implementation of this application, determining the heat release within a preset temperature difference range of the upstream and downstream temperatures specifically includes: determining the corresponding first preset temperature difference time and second preset temperature difference time in the temperature change curve based on the preset temperature difference between the upstream and downstream; and calculating the heat release within the preset temperature difference range of the upstream and downstream temperatures based on the first preset temperature difference time and the second preset temperature difference time.

[0010] In one implementation of this application, the heat release of the upstream and downstream temperatures within a preset temperature difference range is calculated based on the first preset temperature difference time and the second preset temperature difference time. Specifically, this includes: determining a preset temperature difference range time period based on the first preset temperature difference time and the second preset temperature difference time; and integrating the temperature difference within the preset temperature difference range time period to obtain the heat release of the upstream and downstream temperatures within the preset temperature difference range.

[0011] In one implementation of this application, the analysis of whether the DPF has been removed is based on the time interval and the heat release, specifically including: determining whether the time interval is less than a preset time limit and determining whether the heat release is less than a preset heat limit; if it is determined that the time interval is less than the preset time limit and the heat release is less than the preset heat limit, the DPF is determined to be removed.

[0012] In one implementation of this application, before determining whether the time interval is less than a preset time limit and whether the heat release is less than a preset heat limit, the method further includes: calibrating the diesel engine on an engine test bench to obtain a lookup table of DPF carrier heat capacity and exhaust flow rate, and a lookup table of DPF carrier heat capacity and initial temperature of the cooling stage; wherein, the lookup table of DPF carrier heat capacity and exhaust flow rate is used to determine the preset time limit, and the lookup table of DPF carrier heat capacity and initial temperature of the cooling stage is used to determine the preset heat limit.

[0013] Secondly, embodiments of this application also provide a DPF removal detection device, including: an acquisition module, a determination module, and an analysis module; the acquisition module is used to acquire the temperature change curves of the upstream and downstream of the DPF during the parking regeneration cooling stage of the diesel engine, and determine the initial temperature downstream of the DPF during the cooling stage; the determination module is used to determine the time interval from the initial temperature to a preset temperature threshold downstream of the DPF based on the temperature change curves of the upstream and downstream of the cooling stage, and determine the heat release within a preset temperature difference range; the analysis module is used to analyze whether the DPF has been removed based on the time interval and the heat release.

[0014] Thirdly, embodiments of this application also provide a removal detection device for a DPF, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to: acquire temperature change curves upstream and downstream of the DPF during the parking regeneration cooling phase of the diesel engine, and determine the initial temperature downstream of the DPF during the cooling phase; based on the temperature change curves upstream and downstream of the cooling phase, determine the time interval from the initial temperature to a preset temperature threshold downstream of the DPF, and determine the heat release within a preset temperature difference range; and analyze whether the DPF has been removed based on the time interval and the heat release.

[0015] Fourthly, embodiments of this application also provide a non-volatile computer storage medium for DPF removal detection, storing computer-executable instructions. The computer-executable instructions are configured to: acquire temperature change curves upstream and downstream of the DPF during the parking regeneration cooling phase of the diesel engine, and determine the initial temperature downstream of the DPF during the cooling phase; based on the temperature change curves upstream and downstream of the cooling phase, determine the time interval from the initial temperature to a preset temperature threshold downstream of the DPF, and determine the heat release within a preset temperature difference range; and analyze whether the DPF has been removed based on the time interval and the heat release.

[0016] This application provides a method, apparatus, device, and storage medium for detecting DPF removal. It utilizes the delay time of the temperature drop downstream of the DPF and the integral of the temperature difference between the upstream and downstream sides of the DPF to determine whether DPF removal has occurred. On one hand, it offers high reliability, performing the diagnosis during the cooling phase of the parking regeneration process, clearly showing the temperature delay and trend between the upstream and downstream sides of the DPF in terms of presence or absence. On the other hand, it improves the robustness of the diagnosis by comparing the integral value of the temperature difference between the upstream and downstream sides of the DPF over a period of time. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 A flowchart illustrating a method for detecting and removing DPFs provided in this application embodiment;

[0019] Figure 2 A schematic diagram of a DPF removal detection device provided in an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the internal structure of a DPF removal detection device provided in an embodiment of this application. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] DOC: Diesel engine oxidation catalyst, used to convert NO in exhaust gas into NO2, oxidize HC and CO, and at the same time provide an environment for fuel combustion during DPF regeneration.

[0023] DPF (Diesel Particulate Filter): A diesel engine particulate filter used to reduce particulate matter emissions from diesel engine exhaust. During operation, particulate matter accumulates inside the filter. When it reaches a certain level, it can cause a decline in diesel engine power and fuel economy. The deposited particles must be removed promptly to ensure the DPF continues to function properly; this is known as DPF regeneration. DPF regeneration involves injecting fuel through after-cylinder injection or exhaust pipe to increase the DPF's temperature, oxidizing the already trapped particles and restoring its ability to capture particles.

[0024] Parking regeneration: By controlling fuel injection to increase exhaust temperature, the carbon particles in the DPF are burned off. This process includes three stages: heating stage, regeneration stage, and cooling stage.

[0025] DPF parking regeneration requires diesel injection at the DOC inlet to ensure the DOC outlet temperature reaches the regeneration set temperature. The main reactions in the DOC are as follows:

[0026]

[0027] During the cooling phase of parking regeneration, diesel injection stops at the DOC inlet, and the engine runs at a high idle speed (e.g., 1600 rpm) to quickly dissipate heat from the DPF and prevent it from burning out due to excessive heat buildup. Because of the DPF's large heat capacity, the downstream temperature decreases more slowly than the upstream temperature during the cooling phase and remains at a higher temperature for a period of time.

[0028] This application provides a method, apparatus, device, and storage medium for detecting the removal of DPF, in order to solve the following technical problem: how to accurately detect whether a DPF has been removed.

[0029] The technical solutions proposed in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0030] Figure 1 This is a flowchart illustrating a method for detecting and removing DPF (Device Perforator) according to an embodiment of this application. Figure 1 As shown in the figure, the present application provides a method for detecting and removing DPF, which specifically includes the following steps:

[0031] Step 101: Obtain the temperature change curves of the upstream and downstream of the DPF during the parking regeneration cooling stage of the diesel engine, and determine the initial temperature downstream of the DPF during the cooling stage.

[0032] In one embodiment of this application, to determine whether DPF removal has occurred during the DPF parking regeneration cooling phase by utilizing the delay time of the temperature drop downstream of the DPF and the integral of the temperature difference between the upstream and downstream of the DPF, the temperature change curves of the upstream and downstream of the DPF during the diesel engine parking regeneration cooling phase are first obtained. It is understood that this is achieved by using sensors positioned upstream and downstream of the DPF.

[0033] Furthermore, the initial temperature downstream of the DPF during the cooling phase was determined.

[0034] Specifically, the starting time of the cooling phase of the diesel engine in parking regeneration mode is determined; based on the starting time, the initial temperature downstream of the DPF in the cooling phase is determined in the temperature change curve.

[0035] Step 102: Based on the temperature change curves of the upstream and downstream of the cooling stage, determine the time interval from the initial temperature to the preset temperature threshold of the downstream of the DPF, and determine the heat release within the preset temperature difference range of the upstream and downstream.

[0036] In one embodiment of this application, after obtaining the temperature change curves of the upstream and downstream of the DPF during the parking regeneration cooling stage of the diesel engine and determining the initial temperature downstream of the DPF during the cooling stage, the time interval from the initial temperature to the preset temperature threshold downstream of the DPF is first determined based on the temperature change curves of the upstream and downstream of the cooling stage.

[0037] Specifically, the time to be calculated when the downstream of the DPF reaches the preset temperature threshold is determined in the temperature change curve; based on the time to be calculated and the start time, the time interval from the initial temperature to the preset temperature threshold of the downstream of the DPF is determined.

[0038] In one embodiment of this application, after obtaining the temperature change curves of the upstream and downstream of the DPF during the parking regenerative cooling stage of the diesel engine and determining the initial temperature downstream of the DPF during the cooling stage, it is also necessary to determine the heat release within a preset temperature difference range of the upstream and downstream based on the temperature change curves of the upstream and downstream during the cooling stage.

[0039] Specifically, based on the preset temperature difference between upstream and downstream, the corresponding first preset temperature difference time and second preset temperature difference time are determined in the temperature change curve; based on the first preset temperature difference time and the second preset temperature difference time, the heat release of upstream and downstream temperatures within the preset temperature difference range is calculated.

[0040] In one embodiment of this application, the heat release of upstream and downstream temperatures within a preset temperature difference range is calculated based on the first preset temperature difference time and the second preset temperature difference time. Specifically, this includes: determining a preset temperature difference range time period based on the first preset temperature difference time and the second preset temperature difference time; and integrating the temperature difference within the preset temperature difference range time period to obtain the heat release of upstream and downstream temperatures within the preset temperature difference range.

[0041] Step 103: Analyze whether the DPF has been removed based on the time interval and heat release.

[0042] In one embodiment of this application, after determining the time interval from the initial temperature to a preset temperature threshold downstream of the DPF, and determining the heat release within a preset temperature difference range between the upstream and downstream temperatures, the system analyzes whether the DPF has been removed based on the time interval and the heat release.

[0043] Specifically, it is determined whether the time interval is less than a preset time limit and whether the heat release is less than a preset heat limit; if the time interval is less than the preset time limit and the heat release is less than the preset heat limit, the DPF is removed.

[0044] Furthermore, if the time interval is not less than a preset time limit and / or the heat release is not less than a preset heat limit, then the DPF is determined to be normal.

[0045] The above are embodiments of the method proposed in this application. Based on the same inventive concept, embodiments of this application also provide a removal detection device for DPF, the structure of which is as follows: Figure 2 As shown.

[0046] Figure 2This is a schematic diagram of a DPF removal detection device provided in an embodiment of this application. Figure 2 As shown, the device includes: an acquisition module 201, a determination module 202, and an analysis module 203.

[0047] In one embodiment of this application, the acquisition module 201 is used to acquire the temperature change curves of the upstream and downstream of the DPF during the parking regeneration cooling stage of the diesel engine, and determine the initial temperature downstream of the DPF during the cooling stage; the determination module 202 is used to determine the time interval from the initial temperature to a preset temperature threshold downstream of the DPF based on the temperature change curves of the upstream and downstream of the cooling stage, and determine the heat release within a preset temperature difference range; the analysis module 203 is used to analyze whether the DPF has been removed based on the time interval and the heat release.

[0048] The above are embodiments of the method proposed in this application. Based on the same inventive concept, embodiments of this application also provide a removal detection device for DPF, the structure of which is as follows: Figure 3 As shown.

[0049] Figure 3 This is a schematic diagram of the internal structure of a DPF removal detection device provided in an embodiment of this application. Figure 3 As shown, the device includes:

[0050] At least one processor 301;

[0051] And a memory 302 that is communicatively connected to at least one processor;

[0052] The memory 302 stores instructions executable by at least one processor, which are executed by at least one processor 301 to enable at least one processor 301 to:

[0053] Obtain the temperature change curves upstream and downstream of the DPF during the parking regenerative cooling stage of the diesel engine, and determine the initial temperature downstream of the DPF during the cooling stage.

[0054] Based on the temperature change curves of the upstream and downstream of the cooling stage, the time interval from the initial temperature to the preset temperature threshold of the downstream of the DPF is determined, and the heat release within the preset temperature difference range of the upstream and downstream is determined.

[0055] Based on the time interval and heat release, we analyze whether the DPF has been removed.

[0056] Some embodiments of this application provide corresponding to Figure 1 A non-volatile computer storage medium for DPF removal detection, storing computer-executable instructions configured as follows:

[0057] Obtain the temperature change curves upstream and downstream of the DPF during the parking regenerative cooling stage of the diesel engine, and determine the initial temperature downstream of the DPF during the cooling stage.

[0058] Based on the temperature change curves of the upstream and downstream of the cooling stage, the time interval from the initial temperature to the preset temperature threshold of the downstream of the DPF is determined, and the heat release within the preset temperature difference range of the upstream and downstream is determined.

[0059] Based on the time interval and heat release, we analyze whether the DPF has been removed.

[0060] In the 1990s, improvements to a technology could be clearly distinguished as either hardware improvements (e.g., improvements to the circuit structure of diodes, transistors, switches, etc.) or software improvements (improvements to the methodology). However, with technological advancements, many methodological improvements today can be considered direct improvements to the hardware circuit structure. Designers almost always obtain the corresponding hardware circuit structure by programming the improved methodology into the hardware circuit. Therefore, it cannot be said that a methodological improvement cannot be implemented using hardware physical modules. For example, a Programmable Logic Device (PLD) (such as a Field Programmable Gate Array (FPGA)) is such an integrated circuit whose logic function is determined by the user programming the device. Designers can program and "integrate" a digital system onto a PLD themselves, without needing chip manufacturers to design and manufacture dedicated integrated circuit chips. Furthermore, nowadays, instead of manually manufacturing integrated circuit chips, this programming is mostly implemented using "logic compiler" software. Similar to the software compiler used in program development, the original code before compilation must be written in a specific programming language, called a Hardware Description Language (HDL). There are many HDLs, such as ABEL (Advanced Boolean Expression Language), AHDL (Altera Hardware Description Language), Confluence, CUPL (Cornell University Programming Language), HDCal, JHDL (Java Hardware Description Language), Lava, Lola, MyHDL, PALASM, and RHDL (Ruby Hardware Description Language). Currently, the most commonly used are VHDL (Very-High-Speed ​​Integrated Circuit Hardware Description Language) and Verilog. Those skilled in the art should understand that by simply performing some logic programming on the method flow using one of these hardware description languages ​​and programming it into an integrated circuit, the hardware circuit implementing the logical method flow can be easily obtained.

[0061] The controller can be implemented in any suitable manner. For example, it can take the form of a microprocessor or processor and a computer-readable medium storing computer-readable program code (e.g., software or firmware) executable by the (micro)processor, logic gates, switches, application-specific integrated circuits (ASICs), programmable logic controllers, and embedded microcontrollers. Examples of controllers include, but are not limited to, the following microcontrollers: ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20, and Silicon Labs C8051F320. A memory controller can also be implemented as part of the control logic of the memory. Those skilled in the art will also recognize that, in addition to implementing the controller in purely computer-readable program code form, the same functionality can be achieved by logically programming the method steps to make the controller take the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers. Therefore, such a controller can be considered a hardware component, and the means included therein for implementing various functions can also be considered as structures within the hardware component. Alternatively, the means for implementing various functions can be considered as both software modules implementing the method and structures within the hardware component.

[0062] The systems, devices, modules, or units described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, a computer can be, for example, a personal computer, laptop computer, cellular phone, camera phone, smartphone, personal digital assistant, media player, navigation device, email device, game console, tablet computer, wearable device, or any combination of these devices.

[0063] For ease of description, the above devices are described in terms of function, divided into various units. Of course, in implementing this specification, the functions of each unit can be implemented in one or more software and / or hardware.

[0064] Those skilled in the art will understand that the embodiments of this specification can be provided as methods, systems, or computer program products. Therefore, the embodiments of this specification can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the embodiments of this specification can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0065] This specification is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this specification. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0066] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0067] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0068] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0069] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0070] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0071] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0072] This specification can be described in the general context of computer-executable instructions that are executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform a specific task or implement a specific abstract data type. This specification can also be practiced in distributed computing environments, where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0073] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the embodiments of apparatus, devices, and non-volatile computer storage media are basically similar to the method embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0074] The foregoing has described specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.

[0075] The above description is merely one or more embodiments of this specification and is not intended to limit this specification. Various modifications and variations can be made to the one or more embodiments of this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of one or more embodiments of this specification should be included within the scope of the claims of this specification.

Claims

1. A method for detecting the removal of DPF, characterized in that, The method includes: Obtain the temperature change curves upstream and downstream of the DPF during the parking regenerative cooling phase of the diesel engine, and determine the initial temperature downstream of the DPF during the cooling phase. Based on the temperature change curves of the upstream and downstream of the cooling stage, the time interval from the initial temperature to the preset temperature threshold of the downstream of the DPF is determined, and the heat release within the preset temperature difference range of the upstream and downstream is determined. Based on the time interval and the amount of heat released, analyze whether the DPF has been removed; Determine the heat release within a preset temperature difference range between the upstream and downstream sides, specifically including: Based on the preset temperature difference between upstream and downstream, the corresponding first preset temperature difference time and second preset temperature difference time are determined in the temperature change curve. Based on the first preset temperature difference time and the second preset temperature difference time, calculate the heat release within the preset temperature difference range of the upstream and downstream. Based on the first preset temperature difference time and the second preset temperature difference time, the heat release within the preset temperature difference range of the upstream and downstream is calculated, specifically including: Based on the first preset temperature difference time and the second preset temperature difference time, a preset difference range time period is determined; Integrate the temperature difference within the preset difference range time period to obtain the heat release of upstream and downstream temperatures within the preset difference range; Based on the time interval and the heat release, analyze whether the DPF has been removed, specifically including: Determine whether the time interval is less than a preset time limit, and determine whether the heat release is less than a preset heat limit; If it is determined that the time interval is less than a preset time limit and the heat release is less than a preset heat limit, the DPF is removed. Before determining whether the time interval is less than a preset time limit and whether the heat release is less than a preset heat limit, the method further includes: The diesel engine was calibrated on an engine test bench to obtain the DPF carrier heat capacity and exhaust flow rate lookup table and the DPF carrier heat capacity and initial temperature of the cooling stage lookup table; wherein, the DPF carrier heat capacity and exhaust flow rate lookup table is used to determine the preset time limit value, and the DPF carrier heat capacity and initial temperature of the cooling stage lookup table is used to determine the preset heat limit value.

2. The method for detecting the removal of DPF according to claim 1, characterized in that, Determining the initial temperature downstream of the DPF during the cooling phase specifically includes: Determine the start time of the cooling phase of the diesel engine in parking regeneration mode; Based on the starting time, the initial temperature downstream of the DPF during the cooling phase is determined in the temperature change curve.

3. The method for detecting the removal of DPF according to claim 2, characterized in that, Determining the time interval from the initial temperature to the preset temperature threshold downstream of the DPF specifically includes: Determine the time to be calculated corresponding to the downstream of the DPF when it reaches a preset temperature threshold from the temperature change curve; Based on the time to be calculated and the start time, the time interval from the initial temperature to the preset temperature threshold downstream of the DPF is determined.

4. A removal detection device for DPF, characterized in that, The device includes: an acquisition module, a determination module, and an analysis module; The acquisition module is used to acquire the temperature change curves of the upstream and downstream of the DPF during the parking regenerative cooling stage of the diesel engine, and to determine the initial temperature downstream of the DPF during the cooling stage. The determining module is used to determine the time interval from the initial temperature to the preset temperature threshold downstream of the DPF based on the temperature change curves of the upstream and downstream of the cooling stage, and to determine the heat release within the preset temperature difference range of the upstream and downstream. The analysis module is used to analyze whether the DPF has been removed based on the time interval and the heat release. Determine the heat release within a preset temperature difference range between the upstream and downstream sides, specifically including: Based on the preset temperature difference between upstream and downstream, the corresponding first preset temperature difference time and second preset temperature difference time are determined in the temperature change curve. Based on the first preset temperature difference time and the second preset temperature difference time, calculate the heat release within the preset temperature difference range of the upstream and downstream. Based on the first preset temperature difference time and the second preset temperature difference time, the heat release within the preset temperature difference range of the upstream and downstream is calculated, specifically including: Based on the first preset temperature difference time and the second preset temperature difference time, a preset difference range time period is determined; Integrate the temperature difference within the preset difference range time period to obtain the heat release of upstream and downstream temperatures within the preset difference range; Based on the time interval and the heat release, analyze whether the DPF has been removed, specifically including: Determine whether the time interval is less than a preset time limit, and determine whether the heat release is less than a preset heat limit; If it is determined that the time interval is less than a preset time limit and the heat release is less than a preset heat limit, the DPF is removed. Before determining whether the time interval is less than a preset time limit and before determining whether the heat release is less than a preset heat limit, the method further includes: The diesel engine was calibrated on an engine test bench to obtain the DPF carrier heat capacity and exhaust flow rate lookup table and the DPF carrier heat capacity and initial temperature of the cooling stage lookup table; wherein, the DPF carrier heat capacity and exhaust flow rate lookup table is used to determine the preset time limit value, and the DPF carrier heat capacity and initial temperature of the cooling stage lookup table is used to determine the preset heat limit value.

5. A removal detection device for DPF, characterized in that, The device includes: At least one processor; And, a memory communicatively connected to the at least one processor; The memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to: Obtain the temperature change curves upstream and downstream of the DPF during the parking regenerative cooling phase of the diesel engine, and determine the initial temperature downstream of the DPF during the cooling phase. Based on the temperature change curves of the upstream and downstream of the cooling stage, the time interval from the initial temperature to the preset temperature threshold of the downstream of the DPF is determined, and the heat release within the preset temperature difference range of the upstream and downstream is determined. Based on the time interval and the amount of heat released, analyze whether the DPF has been removed; Determine the heat release within a preset temperature difference range between the upstream and downstream sides, specifically including: Based on the preset temperature difference between upstream and downstream, the corresponding first preset temperature difference time and second preset temperature difference time are determined in the temperature change curve. Based on the first preset temperature difference time and the second preset temperature difference time, calculate the heat release within the preset temperature difference range of the upstream and downstream. Based on the first preset temperature difference time and the second preset temperature difference time, the heat release within the preset temperature difference range of the upstream and downstream is calculated, specifically including: Based on the first preset temperature difference time and the second preset temperature difference time, a preset difference range time period is determined; Integrate the temperature difference within the preset difference range time period to obtain the heat release of upstream and downstream temperatures within the preset difference range; Based on the time interval and the heat release, analyze whether the DPF has been removed, specifically including: Determine whether the time interval is less than a preset time limit, and determine whether the heat release is less than a preset heat limit; If it is determined that the time interval is less than a preset time limit and the heat release is less than a preset heat limit, the DPF is removed. Before determining whether the time interval is less than a preset time limit and before determining whether the heat release is less than a preset heat limit, the method further includes: The diesel engine was calibrated on an engine test bench to obtain the DPF carrier heat capacity and exhaust flow rate lookup table and the DPF carrier heat capacity and initial temperature of the cooling stage lookup table; wherein, the DPF carrier heat capacity and exhaust flow rate lookup table is used to determine the preset time limit value, and the DPF carrier heat capacity and initial temperature of the cooling stage lookup table is used to determine the preset heat limit value.

6. A non-volatile computer storage medium for DPF removal detection, storing computer-executable instructions, characterized in that, The computer-executable instructions are set as follows: Obtain the temperature change curves upstream and downstream of the DPF during the parking regenerative cooling phase of the diesel engine, and determine the initial temperature downstream of the DPF during the cooling phase. Based on the temperature change curves of the upstream and downstream of the cooling stage, the time interval from the initial temperature to the preset temperature threshold of the downstream of the DPF is determined, and the heat release within the preset temperature difference range of the upstream and downstream is determined. Based on the time interval and the amount of heat released, analyze whether the DPF has been removed; Determine the heat release within a preset temperature difference range between the upstream and downstream sides, specifically including: Based on the preset temperature difference between upstream and downstream, the corresponding first preset temperature difference time and second preset temperature difference time are determined in the temperature change curve. Based on the first preset temperature difference time and the second preset temperature difference time, calculate the heat release within the preset temperature difference range of the upstream and downstream. Based on the first preset temperature difference time and the second preset temperature difference time, the heat release within the preset temperature difference range of the upstream and downstream is calculated, specifically including: Based on the first preset temperature difference time and the second preset temperature difference time, a preset difference range time period is determined; Integrate the temperature difference within the preset difference range time period to obtain the heat release of upstream and downstream temperatures within the preset difference range; Based on the time interval and the heat release, analyze whether the DPF has been removed, specifically including: Determine whether the time interval is less than a preset time limit, and determine whether the heat release is less than a preset heat limit; If it is determined that the time interval is less than a preset time limit and the heat release is less than a preset heat limit, the DPF is removed. Before determining whether the time interval is less than a preset time limit and before determining whether the heat release is less than a preset heat limit, the method further includes: The diesel engine was calibrated on an engine test bench to obtain the DPF carrier heat capacity and exhaust flow rate lookup table and the DPF carrier heat capacity and initial temperature of the cooling stage lookup table; wherein, the DPF carrier heat capacity and exhaust flow rate lookup table is used to determine the preset time limit value, and the DPF carrier heat capacity and initial temperature of the cooling stage lookup table is used to determine the preset heat limit value.

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