Control method, control device, and vehicle for dpf regeneration

Abstract

The application provides a DPF regeneration control method, a control device and a vehicle. The aftertreatment device comprises a DPF. A throttle valve is in communication with an inlet of the aftertreatment device. The throttle valve is used to control the temperature upstream of the DPF. The method comprises: detecting the carbon loading in the DPF in real time; in the case that the carbon loading is greater than or equal to a carbon loading threshold, sending a regeneration request, the regeneration request being a request for combustion treatment of the accumulated carbon in the DPF; in response to the regeneration request, controlling the opening of the throttle valve to be reduced to increase the temperature upstream of the DPF for regeneration treatment; and in the case that the carbon loading is less than the carbon loading threshold, controlling the opening of the throttle valve to be increased to reduce the temperature upstream of the DPF. The method solves the problem in the prior art that the carbon loading in the DPF is not detected and subjected to regeneration treatment during the delivery process of a new vehicle, thereby causing the DPF to be overloaded.

Description

Technical Field

[0001] This invention relates to the field of DPF regeneration technology, and more specifically, to a control method, control device, computer-readable storage medium, and vehicle for DPF regeneration. Background Technology

[0002] Currently, fuel-saving models typically have high initial smoke levels and short regeneration mileage. During vehicle delivery, the truck is empty and unloaded, resulting in low upstream temperatures for the DPF (Diesel Particulate Filter) and continuous carbon buildup. If the delivery distance is short, the vehicle may reach the required carbon load for regeneration at the dealership, necessitating dealer regeneration. Conversely, if the distance is long, customers may disable regeneration to save fuel, potentially overloading the DPF and requiring service station intervention. Therefore, regeneration during delivery to address DPF overload in new vehicles remains an ineffective solution. Summary of the Invention

[0003] The main objective of this application is to provide a control method, control device, computer-readable storage medium, and vehicle for DPF regeneration, so as to at least solve the problem of DPF overload caused by the failure to detect and regenerate the DPF carbon load during the delivery of new vehicles in the prior art.

[0004] To achieve the above objectives, according to one aspect of this application, a control method for DPF regeneration is provided. A post-processor includes a DPF, and a throttle valve is connected to the inlet of the post-processor. The throttle valve is used to control the upstream temperature of the DPF. The method includes: real-time detection of the carbon load within the DPF; if the carbon load is greater than or equal to a carbon load threshold, sending a regeneration request, the regeneration request being a request to burn off accumulated carbon in the DPF; in response to the regeneration request, controlling a decrease in the opening of the throttle valve to increase the upstream temperature of the DPF for regeneration; and if the carbon load is less than the carbon load threshold, controlling an increase in the opening of the throttle valve to decrease the upstream temperature of the DPF.

[0005] Optionally, if the carbon load is greater than or equal to the carbon load threshold, a regeneration request is sent, including: obtaining the single driving time and total engine running time of the vehicle where the DPF is located, wherein the single driving time is the running time from the start to the stop of the vehicle, and the total engine running time is the cumulative running time from the first start of the vehicle to the current moment; and if a first condition is met, the regeneration request is sent, wherein the first condition is that the carbon load is greater than or equal to the carbon load threshold, the single driving time is greater than or equal to a first time threshold, and the total engine running time is less than or equal to a second time threshold.

[0006] Optionally, the afterprocessor further includes a DOC (Denominates of Carbon), with the DPF inlet connected to the DOC outlet. Noble metals on the surface of the DOC react with nitric oxide in the exhaust gas to generate nitrogen dioxide. The nitrogen dioxide enters the DPF and undergoes a regeneration reaction with the accumulated carbon. In response to the regeneration request, the opening of the throttle valve is controlled to decrease to raise the upstream temperature of the DPF for regeneration treatment. This includes: obtaining the noble metal content on the surface of the DOC; determining a target temperature value based on the noble metal content using a noble metal oxidation temperature table, where the noble metal oxidation temperature table is a relationship table between the noble metal content and the target temperature value, with higher noble metal content resulting in a higher target temperature value; and controlling the decrease in the opening of the throttle valve so that the upstream temperature of the DPF is the target temperature value.

[0007] Optionally, before determining the temperature value by consulting a precious metal oxidation temperature table based on the precious metal content, the method further includes: obtaining multiple precious metal samples and multiple carbon samples, wherein the precious metal content of all the precious metal samples is different, the initial carbon content of all the carbon samples is the same, and the number of precious metal samples is the same as the number of carbon samples; obtaining nitrogen dioxide by performing a redox reaction between the precious metal samples and the nitric oxide, wherein the precious metal samples correspond one-to-one with the redox reactions; and regenerating the nitrogen dioxide with the carbon samples, adjusting the regeneration reaction multiple times within a preset temperature range. The reaction temperature is adjusted accordingly, and the remaining carbon content of the carbon sample is monitored in real time. The oxidation efficiency is calculated based on the remaining carbon content, the initial carbon content, and the reaction time. The reaction temperature corresponding to the maximum value of the oxidation efficiency is determined as the target reaction temperature, which is the temperature required to regenerate the precious metal content. Tests are conducted on all the precious metal samples and the carbon sample to obtain multiple corresponding target reaction temperatures, each corresponding to a specific precious metal sample. A precious metal oxidation temperature table is obtained based on all the precious metal samples and their corresponding target reaction temperatures.

[0008] Optionally, after obtaining the single-trip time and total engine running time of the vehicle where the DPF is located, the method further includes: if the total engine running time is greater than the second time threshold, the total engine running time will no longer be used as a condition for triggering the regeneration request; if the second condition is met, the regeneration request is sent, wherein the first condition is that the carbon load is greater than or equal to the carbon load threshold and the single-trip time is greater than or equal to the first time threshold.

[0009] Optionally, after controlling the reduction of the opening of the throttle valve to increase the upstream temperature of the DPF for regeneration in response to the regeneration request, the method further includes: if the regeneration time reaches a preset regeneration time, controlling the increase of the opening of the throttle valve to reduce the upstream temperature of the DPF.

[0010] Optionally, after controlling the reduction of the opening of the throttle valve to increase the upstream temperature of the DPF for regeneration in response to the regeneration request, the method further includes: issuing an alarm message when the regeneration time reaches the preset regeneration time and the carbon loading is greater than or equal to the carbon loading threshold, the alarm message being used to indicate that the regeneration process of the DPF has failed.

[0011] According to another aspect of this application, a control device for DPF regeneration is provided. A post-processor includes a DPF, and a throttle valve is connected to the inlet of the post-processor. The throttle valve is used to control the upstream temperature of the DPF. The device includes: a detection unit for real-time detection of the carbon load within the DPF; a first sending unit for sending a regeneration request when the carbon load is greater than or equal to a carbon load threshold, the regeneration request being a request to burn off accumulated carbon in the DPF; a first control unit for controlling a reduction in the opening of the throttle valve to increase the upstream temperature of the DPF for regeneration in response to the regeneration request; and a second control unit for controlling an increase in the opening of the throttle valve to reduce the upstream temperature of the DPF when the carbon load is less than the carbon load threshold.

[0012] According to another aspect of this application, a computer-readable storage medium is provided, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform any of the described methods.

[0013] According to another aspect of this application, a vehicle is provided, 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 including methods for performing any one of the methods described.

[0014] The technical solution of this application, in the control method for DPF regeneration, firstly, detects the carbon load within the DPF in real time; then, if the carbon load is greater than or equal to a carbon load threshold, a regeneration request is sent, which is a request to burn the accumulated carbon in the DPF; subsequently, in response to the regeneration request, the opening of the throttle valve is reduced to raise the upstream temperature of the DPF for regeneration; finally, if the carbon load is less than the carbon load threshold, the opening of the throttle valve is increased to lower the upstream temperature of the DPF. This application triggers a regeneration request when the carbon load exceeds the limit, raises the upstream temperature of the DPF in response to the regeneration request, adjusts the DPF temperature to a set value, and exits the regeneration process when the carbon load is less than the limit. This application solves the problem in the prior art where the DPF overload is caused by the failure to detect and regenerate the carbon load during new vehicle delivery. Attached Figure Description

[0015] Figure 1 A hardware structure block diagram of a mobile terminal for performing a control method for DPF regeneration according to an embodiment of this application is shown.

[0016] Figure 2 A schematic flowchart of a control method for DPF regeneration according to an embodiment of this application is shown;

[0017] Figure 3 A schematic flowchart of a DPF regeneration method according to an embodiment of this application is shown;

[0018] Figure 4 A schematic diagram illustrating a DPF regeneration request triggering according to an embodiment of this application is shown.

[0019] Figure 5 A schematic flowchart of a specific control method for DPF regeneration according to an embodiment of this application is shown;

[0020] Figure 6 A structural block diagram of a control device for DPF regeneration according to an embodiment of this application is shown.

[0021] The above figures include the following reference numerals:

[0022] 102. Processor; 104. Memory; 106. Transmission device; 108. Input / output device. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] For ease of description, the following explains some of the nouns or terms used in the embodiments of this application:

[0027] DOC: Catalytic oxidation converter;

[0028] DPF: Diesel Particulate Filter;

[0029] DPF overload: The exhaust gas from the engine contains particles. When the engine exhaust temperature is high, the particles can be burned off when passing through the DPF in the aftertreatment box. When the engine exhaust temperature is low, the particles in the exhaust gas will accumulate in the DPF. If they accumulate too much and exceed a certain limit, it will cause DPF overload.

[0030] Regeneration: When too much carbon accumulates in the DPF, it is necessary to increase the upstream temperature of the DPF to burn off the carbon in the DPF;

[0031] Passive regeneration: The precious metals in the DOC aftertreatment react with the NO in the exhaust gas from the engine to generate NO2, which then enters the DPF to oxidize the particles.

[0032] As described in the background section, in the prior art, if the distance to the sales station is relatively short when delivering a vehicle, the carbon load required for regeneration may have already been reached, necessitating regeneration by the dealer. If the distance is relatively far, the customer may press the regeneration prohibition switch to save fuel, potentially causing DPF overload, requiring service station intervention. To address the problem of DPF overload caused by the failure to detect and regenerate the carbon load during new vehicle delivery in the prior art, embodiments of this application provide a DPF regeneration control method, control device, computer-readable storage medium, and vehicle.

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] The methods and embodiments provided in this application can be executed on a mobile terminal, computer terminal, or similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for a DPF regeneration control method according to an embodiment of the present invention. Figure 1 As shown, a mobile terminal may include one or more ( Figure 1 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0035] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the device information display method in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the aforementioned networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0036] This embodiment provides a control method for DPF regeneration that runs on a mobile terminal, computer terminal, or similar computing device. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Also, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0037] Figure 2 This is a flowchart of a control method for DPF regeneration according to an embodiment of this application. Figure 2 As shown, the method includes the following steps:

[0038] Step S201: Real-time detection of carbon loading in the DPF.

[0039] Specifically, in order to monitor the carbon accumulation in the DPF, it is necessary to detect the carbon loading in the DPF in real time.

[0040] Step S202: If the carbon load is greater than or equal to the carbon load threshold, a regeneration request is sent. The regeneration request is a request to burn the accumulated carbon in the DPF.

[0041] Specifically, once the carbon load reaches or exceeds the set carbon load threshold, it indicates that too much carbon has accumulated in the DPF and will clog the DPF. A regeneration request will be sent to request the combustion of the carbon accumulated in the DPF in order to clear the carbon accumulation in the DPF and restore its filtering function.

[0042] In step S203, in response to the regeneration request, the opening of the throttle valve is reduced to increase the upstream temperature of the DPF for regeneration.

[0043] Specifically, upon receiving a regeneration request, the opening of the throttle valve is reduced to increase the upstream temperature of the DPF. By increasing the resistance to the exhaust gas flow, reducing the throttle valve causes the exhaust gas to remain in the DPF for a longer period, thereby raising the upstream temperature of the DPF and promoting carbon combustion and removal.

[0044] In step S204, when the carbon loading is less than the carbon loading threshold, the opening of the throttle valve is increased to reduce the upstream temperature of the DPF.

[0045] Specifically, when the carbon load is below the carbon load threshold, the opening of the throttle valve is increased to lower the upstream temperature of the DPF. By reducing the resistance to exhaust gas flow, increasing the throttle valve reduces the residence time of exhaust gas within the DPF, thereby lowering the upstream temperature of the DPF. This helps prevent over-combustion and maintains good emission control. Therefore, real-time monitoring of the carbon load and controlling the throttle valve opening according to different conditions can effectively manage the DPF regeneration process, ensuring its normal operation and effective removal of carbon deposits.

[0046] In the above embodiments, firstly, the carbon load within the DPF is detected in real time; then, if the carbon load is greater than or equal to a carbon load threshold, a regeneration request is sent, which is a request to burn off the accumulated carbon in the DPF; subsequently, in response to the regeneration request, the opening of the throttle valve is reduced to raise the upstream temperature of the DPF for regeneration; finally, if the carbon load is less than the carbon load threshold, the opening of the throttle valve is increased to lower the upstream temperature of the DPF. By triggering a regeneration request when the carbon load exceeds the limit, and in response to the regeneration request, raising the upstream temperature of the DPF to a set value, and exiting the regeneration process when the carbon load is less than the limit, this application solves the problem of DPF overload caused by the failure to detect and regenerate the DPF carbon load during new vehicle delivery in the prior art.

[0047] To enable those skilled in the art to better understand the technical solution of this application, the implementation process of the DPF regeneration control method of this application will be described in detail below with reference to specific embodiments.

[0048] To ensure the accuracy and effectiveness of DPF regeneration timing, in one optional implementation, such as Figure 3 As shown, step S202 above includes:

[0049] Step S2021: Obtain the single driving time and total engine running time of the vehicle where the DPF is located. The single driving time is the running time from the start of the vehicle to the stop of driving. The total engine running time is the cumulative running time from the first start of the vehicle to the current moment.

[0050] Specifically, to ensure the accuracy and effectiveness of DPF regeneration timing, it is first necessary to obtain the vehicle's carbon load, single-trip driving time, and total engine running time. This ensures that DPF regeneration occurs after sufficient particulate matter has accumulated, avoiding regeneration too early or too late and improving regeneration efficiency. This can be achieved through sensors installed on the vehicle or the vehicle's computer system. The effects of sending a regeneration request include:

[0051] Step S2022: If the first condition is met, a regeneration request is sent. The first condition is that the carbon load is greater than or equal to the carbon load threshold, the single driving time is greater than or equal to the first time threshold, and the total engine running time is less than or equal to the second time threshold.

[0052] Specifically, the process determines whether the carbon load is greater than or equal to a carbon load threshold, whether the single driving time is greater than or equal to a first time threshold, and whether the total engine running time is less than or equal to a second time threshold. If all three conditions are met, a regeneration request is sent. Performing DPF regeneration under these conditions ensures sufficient engine running time, a thorough regeneration process, improved regeneration effectiveness, and extended DPF lifespan. Sending a regeneration request allows the vehicle's DPF to regenerate, removing accumulated particulate matter to ensure normal engine operation and reduce exhaust emissions. Through regeneration, the particulate filter can be restored to normal operating conditions, ensuring vehicle emissions meet environmental standards and engine performance is unaffected. The first time threshold is significantly smaller than the second time threshold; for example, the first time threshold is typically set to 2 hours, and the second time threshold is typically set to 9 days.

[0053] To remove accumulated particulate matter and carbon emissions from inside the DPF to restore engine performance and reduce emissions, in an optional implementation, after step S2021, the method further includes:

[0054] Step S301: If the total engine running time is greater than the second time threshold, the total engine running time will no longer be used as a condition for triggering the regeneration request.

[0055] Specifically, total engine uptime refers to the cumulative operating time of the engine since it began use. This data can be used to assess the engine's condition, develop maintenance and upkeep plans, and determine the engine's lifespan and value. When the total engine uptime reaches a second time threshold, it means the engine has operated long enough that triggering a regeneration request is no longer necessary. At this point, other conditions may be required to trigger a regeneration request to ensure that particulate matter and pollutant emissions from the engine remain at acceptable levels.

[0056] Step S302: If the second condition is met, a regeneration request is sent. The first condition is that the carbon load is greater than or equal to the carbon load threshold and the single driving time is greater than or equal to the first time threshold.

[0057] Specifically, regardless of the total engine running time, as long as the carbon load and single-trip time conditions are met, a regeneration request can be triggered to perform a regeneration operation to remove particulate matter and carbon emissions accumulated inside the engine, thereby restoring engine performance and reducing emissions.

[0058] To ensure regeneration efficiency while reducing resource waste, in one optional implementation, such as Figure 4 As shown, step S203 above includes:

[0059] Step S2031: Obtain the precious metal content on the surface of the DOC;

[0060] Specifically, the aftertreatment system also includes a DOC (Diesel Oxide Charge). The DPF (Diesel Particulate Filter) inlet is connected to the DOC outlet. Precious metals on the surface of the DOC react with nitric oxide in the exhaust to generate nitrogen dioxide. This nitrogen dioxide then enters the DPF and undergoes a regeneration reaction with accumulated carbon. The proportion of NO2 after the reaction varies depending on the amount of precious metals in the DOC. More precious metals in the DOC result in a higher proportion of NO2 after the reaction, leading to higher DPF regeneration efficiency, and vice versa. First, it's necessary to determine the precious metal content on the surface of the DOC. Typically, the precious metals are applied during the manufacturing process, and the content is fixed. However, the precious metal content may differ between different vehicles.

[0061] Step S2032: Determine the target temperature value by consulting the precious metal oxidation temperature table based on the precious metal content. The precious metal oxidation temperature table is a table showing the relationship between the precious metal content and the target temperature value. The higher the precious metal content, the higher the target temperature value.

[0062] Specifically, the target temperature value is determined by consulting a precious metal oxidation temperature table based on the precious metal content. This table is established based on the relationship between precious metal content and target temperature values. For example, when the precious metal content in the DOC of the post-processor is 20g and a regeneration request is received, the upstream temperature of the DPF is increased to 480℃ because 20g of DOC has a high regeneration efficiency at this temperature. When the precious metal content in the DOC of the post-processor is 15g and a regeneration request is received, the upstream temperature of the DPF is increased to 350℃. Because the precious metal content is low, if the temperature is increased to 480℃ by opening the post-injection system, incomplete combustion will result in a higher proportion of other gases and a lower proportion of NO2 after the DOC. If the temperature is only increased to 350℃, the proportion of NO2 after the DOC is higher, thus resulting in higher particulate matter oxidation efficiency.

[0063] Step S2033: Control the reduction of the throttle valve opening so that the upstream temperature of the DPF is the target temperature value.

[0064] Specifically, by controlling and reducing the opening of the throttle valve, the upstream temperature of the DPF is made to reach the aforementioned target temperature value.

[0065] To maximize regeneration efficiency, in an optional implementation, prior to step S2032, the method further includes:

[0066] Step S401: Obtain multiple precious metal samples and multiple carbon samples. The precious metal content of all precious metal samples is different, and the initial carbon content of all carbon samples is the same. The number of precious metal samples is the same as the number of carbon samples.

[0067] Specifically, in order to determine the optimal oxidation temperature for different precious metal samples for regeneration, it is necessary to first obtain multiple precious metal samples and multiple carbon samples, where each precious metal sample has a different precious metal content, and all carbon samples have the same initial carbon content.

[0068] In step S402, nitrogen dioxide is obtained by redox reaction between the precious metal sample and nitric oxide. The precious metal sample and the redox reaction are in one-to-one correspondence.

[0069] Specifically, a precious metal sample is reacted with nitric oxide in a redox reaction to obtain nitrogen dioxide.

[0070] Step S403: Nitrogen dioxide is reacted with carbon sample to regenerate the sample. The reaction temperature of the regeneration reaction is adjusted multiple times within the preset temperature range, and the remaining carbon content of the carbon sample is detected in real time.

[0071] Specifically, the nitrogen dioxide is reacted with a carbon sample to regenerate the sample. The reaction temperature is adjusted multiple times within a preset temperature range to find the optimal reaction temperature. The remaining carbon content of the carbon sample is monitored in real time until the remaining carbon content remains unchanged or all carbon has reacted completely.

[0072] Step S404: The oxidation efficiency is calculated based on the remaining carbon content, the initial carbon content, and the reaction time.

[0073] Specifically, the difference between the initial carbon content and the remaining carbon content is calculated and recorded as the consumed carbon content. The oxidation efficiency is then calculated by dividing the consumed carbon content by the reaction time.

[0074] Step S405: The reaction temperature corresponding to the maximum value of oxidation efficiency is determined as the target reaction temperature, which is the temperature value required to regenerate the precious metal content.

[0075] Specifically, the reaction temperature corresponding to the maximum oxidation efficiency of the precious metal sample during the experiment is found and determined as the target reaction temperature. This target reaction temperature will be used to achieve the temperature value required for the regeneration treatment of the precious metal content.

[0076] Step S406: Test all precious metal samples and carbon samples to obtain multiple target reaction temperatures, with each reaction temperature corresponding to a precious metal sample.

[0077] Specifically, the optimal regeneration temperature was determined for different precious metal samples to maximize regeneration efficiency and reduce resource waste. Experiments were conducted on all precious metal and carbon samples to obtain the target reaction temperature for each precious metal sample.

[0078] Step S407: Obtain a table of noble metal oxidation temperatures based on all noble metal samples and their corresponding target reaction temperatures.

[0079] Specifically, all the precious metal samples and their corresponding target reaction temperatures are recorded and stored in a table, which is the precious metal oxidation temperature table mentioned above.

[0080] To prevent overheating after the regeneration process, in an optional embodiment, after step S203, the method further includes:

[0081] Step S501: When the regeneration process reaches the preset regeneration time, the opening of the throttle valve is increased to reduce the upstream temperature of the DPF.

[0082] Specifically, when the regeneration process reaches the preset regeneration time, to prevent the DPF from remaining in a high-temperature environment, it is necessary to reduce the upstream temperature of the DPF to prevent overheating during the regeneration process. Overheating may cause the DPF to melt or be damaged, thus affecting its regeneration efficiency and lifespan. By controlling and increasing the opening of the throttle valve, the rate at which exhaust gas enters the DPF can be reduced, thereby lowering the upstream temperature of the DPF. This can effectively protect the DPF and extend its service life.

[0083] To promptly detect DPF malfunctions, in one optional implementation, after step S203, the method further includes:

[0084] Step S601: If the regeneration process takes a preset time and the carbon loading is greater than or equal to the carbon loading threshold, an alarm message is issued to indicate that the regeneration process of the DPF has failed.

[0085] Specifically, this is to ensure that the DPF can be regenerated in a timely manner and maintain good working condition. If the regeneration time reaches the preset time but the carbon load is still high, it may mean that the DPF is malfunctioning and unable to effectively remove particulate matter. In this case, issuing an alarm message can promptly remind delivery personnel to check and repair, avoiding problems such as emissions non-compliance and vehicle performance degradation caused by the malfunction. It can also prevent the abnormal vehicle from entering the market or being discovered by customers, thereby reducing repair or return costs. Therefore, issuing an alarm message enables timely detection of problems and the implementation of measures to ensure the normal operation of vehicles and the protection of the environment.

[0086] This embodiment relates to a specific control method for DPF regeneration, such as... Figure 5 As shown, it includes the following steps:

[0087] Step S1: Obtain carbon load, cumulative time of this driving cycle (single driving time), and total engine running time;

[0088] Step S2: When the carbon load and the cumulative time of this driving cycle are greater than or equal to the corresponding threshold, and the total engine running time is less than or equal to the corresponding threshold, a regeneration request is triggered;

[0089] Step S3: Obtain the precious metal content of DOC, and determine the upstream temperature value of DPF based on the precious metal content. For example, when the precious metal content is 20g, the upstream temperature of DPF is increased to 480℃, and when the precious metal content is 15g, the upstream temperature of DPF is increased to 380℃.

[0090] Step S4: When the carbon loading is less than the threshold or the regeneration time exceeds the time limit, the regeneration process ends and the upstream temperature of the DPF is reduced to the temperature value before the regeneration process.

[0091] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0092] This application also provides a control device for DPF regeneration. It should be noted that the control device for DPF regeneration in this application can be used to execute the control method for DPF regeneration provided in this application. This device is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0093] The control device for DPF regeneration provided in the embodiments of this application will be described below.

[0094] Figure 6 This is a structural block diagram of a control device for DPF regeneration according to an embodiment of this application. Figure 6 As shown, the device includes:

[0095] The detection unit 10 is used to detect the carbon loading in the DPF in real time.

[0096] Specifically, in order to monitor the carbon accumulation in the DPF, it is necessary to detect the carbon loading in the DPF in real time.

[0097] The first sending unit 20 is used to send a regeneration request when the carbon load is greater than or equal to the carbon load threshold. The regeneration request is a request to burn the accumulated carbon in the DPF.

[0098] Specifically, once the carbon load reaches or exceeds the set carbon load threshold, it indicates that too much carbon has accumulated in the DPF and will clog the DPF. A regeneration request will be sent to request the combustion of the carbon accumulated in the DPF in order to clear the carbon accumulation in the DPF and restore its filtering function.

[0099] The first control unit 30 is configured to, in response to a regeneration request, control the reduction of the opening of the throttle valve to increase the upstream temperature of the DPF for regeneration.

[0100] Specifically, upon receiving a regeneration request, the opening of the throttle valve is reduced to increase the upstream temperature of the DPF. By increasing the resistance to the exhaust gas flow, reducing the throttle valve causes the exhaust gas to remain in the DPF for a longer period, thereby raising the upstream temperature of the DPF and promoting carbon combustion and removal.

[0101] The second control unit 40 is used to control the increase of the opening of the throttle valve to reduce the upstream temperature of the DPF when the carbon load is less than the carbon load threshold.

[0102] Specifically, when the carbon load is below the carbon load threshold, the opening of the throttle valve is increased to lower the upstream temperature of the DPF. By reducing the resistance to exhaust gas flow, increasing the throttle valve reduces the residence time of exhaust gas within the DPF, thereby lowering the upstream temperature of the DPF. This helps prevent over-combustion and maintains good emission control. Therefore, real-time monitoring of the carbon load and controlling the throttle valve opening according to different conditions can effectively manage the DPF regeneration process, ensuring its normal operation and effective removal of carbon deposits.

[0103] In this embodiment, a detection unit is used to detect the carbon load in the DPF in real time; a first sending unit is used to send a regeneration request when the carbon load is greater than or equal to a carbon load threshold, the regeneration request being a request to burn off the accumulated carbon in the DPF; a first control unit is used to control the reduction of the throttle valve opening to increase the upstream temperature of the DPF for regeneration processing in response to the regeneration request; a second control unit is used to control the increase of the throttle valve opening to decrease the upstream temperature of the DPF when the carbon load is less than the carbon load threshold. This application triggers a regeneration request when the carbon load exceeds the limit, and in response to the regeneration request, raises the upstream temperature of the DPF, adjusting the DPF temperature to a set value. The regeneration process ends when the carbon load is less than the limit. This application solves the problem in the prior art where the lack of DPF carbon load detection during new vehicle delivery leads to DPF overload.

[0104] To ensure the accuracy and effectiveness of DPF regeneration timing, in one optional implementation, the first transmitting unit includes:

[0105] The first acquisition module acquires the single driving time and total engine running time of the vehicle where the DPF is located. The single driving time is the running time from the moment the vehicle starts and stops, and the total engine running time is the cumulative running time from the moment the vehicle is first started to the current moment.

[0106] Specifically, to ensure the accuracy and effectiveness of DPF regeneration timing, it is first necessary to obtain the vehicle's carbon load, single-trip driving time, and total engine running time. This ensures that DPF regeneration occurs after sufficient particulate matter has accumulated, avoiding regeneration too early or too late and improving regeneration efficiency. This can be achieved through sensors installed on the vehicle or the vehicle's computer system. The effects of sending a regeneration request include:

[0107] The sending module sends a regeneration request when the first condition is met. The first condition is that the carbon load is greater than or equal to the carbon load threshold, the single driving time is greater than or equal to the first time threshold, and the total engine running time is less than or equal to the second time threshold.

[0108] Specifically, the process determines whether the carbon load is greater than or equal to a carbon load threshold, whether the single driving time is greater than or equal to a first time threshold, and whether the total engine running time is less than or equal to a second time threshold. If all three conditions are met, a regeneration request is sent. Performing DPF regeneration under these conditions ensures sufficient engine running time, a thorough regeneration process, improved regeneration effectiveness, and extended DPF lifespan. Sending a regeneration request allows the vehicle's DPF to regenerate, removing accumulated particulate matter to ensure normal engine operation and reduce exhaust emissions. Through regeneration, the particulate filter can be restored to normal operating conditions, ensuring vehicle emissions meet environmental standards and engine performance is unaffected. The first time threshold is significantly smaller than the second time threshold; for example, the first time threshold is typically set to 2 hours, and the second time threshold is typically set to 9 days.

[0109] To remove particulate matter and carbon emissions accumulated inside the DPF to restore engine performance and reduce emissions, in one optional embodiment, the device further includes:

[0110] The failure unit is used to ensure that, after obtaining the single driving time and total engine running time of the vehicle where the DPF is located, the total engine running time will no longer be used as a condition for triggering the regeneration request if the total engine running time is greater than the second time threshold.

[0111] Specifically, total engine uptime refers to the cumulative operating time of the engine since it began use. This data can be used to assess the engine's condition, develop maintenance and upkeep plans, and determine the engine's lifespan and value. When the total engine uptime reaches a second time threshold, it means the engine has operated long enough that triggering a regeneration request is no longer necessary. At this point, other conditions may be required to trigger a regeneration request to ensure that particulate matter and pollutant emissions from the engine remain at acceptable levels.

[0112] The second sending unit sends a regeneration request when the second condition is met. The first condition is that the carbon load is greater than or equal to the carbon load threshold and the single driving time is greater than or equal to the first time threshold.

[0113] Specifically, regardless of the total engine running time, as long as the carbon load and single-trip time conditions are met, a regeneration request can be triggered to perform a regeneration operation to remove particulate matter and carbon emissions accumulated inside the engine, thereby restoring engine performance and reducing emissions.

[0114] To ensure regeneration efficiency while reducing resource waste, in one optional implementation, the first control unit includes:

[0115] The second acquisition module acquires the precious metal content on the surface of the DOC;

[0116] Specifically, the aftertreatment system also includes a DOC (Diesel Oxide Charge). The DPF (Diesel Particulate Filter) inlet is connected to the DOC outlet. Precious metals on the surface of the DOC react with nitric oxide in the exhaust to generate nitrogen dioxide. This nitrogen dioxide then enters the DPF and undergoes a regeneration reaction with accumulated carbon. The proportion of NO2 after the reaction varies depending on the amount of precious metals in the DOC. More precious metals in the DOC result in a higher proportion of NO2 after the reaction, leading to higher DPF regeneration efficiency, and vice versa. First, it's necessary to determine the precious metal content on the surface of the DOC. Typically, the precious metals are applied during the manufacturing process, and the content is fixed. However, the precious metal content may differ between different vehicles.

[0117] The module determines the target temperature value by consulting the precious metal oxidation temperature table based on the precious metal content. The precious metal oxidation temperature table is a relationship table between the precious metal content and the target temperature value. The higher the precious metal content, the higher the target temperature value.

[0118] Specifically, the target temperature value is determined by consulting a precious metal oxidation temperature table based on the precious metal content. This table is established based on the relationship between precious metal content and target temperature values. For example, when the precious metal content in the DOC of the post-processor is 20g and a regeneration request is received, the upstream temperature of the DPF is increased to 480℃ because 20g of DOC has a high regeneration efficiency at this temperature. When the precious metal content in the DOC of the post-processor is 15g and a regeneration request is received, the upstream temperature of the DPF is increased to 350℃. Because the precious metal content is low, if the temperature is increased to 480℃ by opening the post-injection system, incomplete combustion will result in a higher proportion of other gases and a lower proportion of NO2 after the DOC. If the temperature is only increased to 350℃, the proportion of NO2 after the DOC is higher, thus resulting in higher particulate matter oxidation efficiency.

[0119] The control module controls the reduction of the throttle valve opening so that the upstream temperature of the DPF reaches the target temperature value.

[0120] Specifically, by controlling and reducing the opening of the throttle valve, the upstream temperature of the DPF is made to reach the target temperature value.

[0121] To maximize regeneration efficiency, in one optional embodiment, the above-mentioned apparatus further includes:

[0122] The acquisition unit is used to acquire multiple precious metal samples and multiple carbon samples before determining the target temperature value by consulting the precious metal oxidation temperature table based on the precious metal content. All precious metal samples have different precious metal contents, and all carbon samples have the same initial carbon content. The number of precious metal samples is the same as the number of carbon samples.

[0123] Specifically, in order to determine the optimal oxidation temperature for different precious metal samples for regeneration, it is necessary to first obtain multiple precious metal samples and multiple carbon samples, where each precious metal sample has a different precious metal content, and all carbon samples have the same initial carbon content.

[0124] The first reaction unit is used to carry out a redox reaction between a precious metal sample and nitric oxide to obtain nitrogen dioxide. The precious metal sample and the redox reaction are in one-to-one correspondence.

[0125] Specifically, a precious metal sample is reacted with nitric oxide in a redox reaction to obtain nitrogen dioxide.

[0126] The second reaction unit is used to regenerate nitrogen dioxide with carbon samples. The reaction temperature of the regeneration reaction is adjusted multiple times within a preset temperature range, and the remaining carbon content of the carbon sample is detected in real time.

[0127] Specifically, the nitrogen dioxide is reacted with a carbon sample to regenerate the sample. The reaction temperature is adjusted multiple times within a preset temperature range to find the optimal reaction temperature. The remaining carbon content of the carbon sample is monitored in real time until the remaining carbon content remains unchanged or all carbon has reacted completely.

[0128] The calculation unit is used to calculate the oxidation efficiency based on the remaining carbon content, the initial carbon content, and the reaction time.

[0129] Specifically, the difference between the initial carbon content and the remaining carbon content is calculated and recorded as the consumed carbon content. The oxidation efficiency is then calculated by dividing the consumed carbon content by the reaction time.

[0130] The determination unit is used to determine the reaction temperature corresponding to the maximum oxidation efficiency as the target reaction temperature, which is the temperature value required to regenerate the precious metal content.

[0131] Specifically, the reaction temperature corresponding to the maximum oxidation efficiency of the precious metal sample during the experiment is found and determined as the target reaction temperature. This target reaction temperature will be used to achieve the temperature value required for the regeneration treatment of the precious metal content.

[0132] The test unit is used to test all precious metal samples and carbon samples to obtain multiple target reaction temperatures, with each reaction temperature corresponding to a precious metal sample.

[0133] Specifically, the optimal regeneration temperature was determined for different precious metal samples to maximize regeneration efficiency and reduce resource waste. Experiments were conducted on all precious metal and carbon samples to obtain the target reaction temperature for each precious metal sample.

[0134] The recording unit is used to generate a precious metal oxidation temperature table based on all precious metal samples and their corresponding target reaction temperatures.

[0135] Specifically, all the precious metal samples and their corresponding target reaction temperatures are recorded and stored in a table, which is the precious metal oxidation temperature table mentioned above.

[0136] To prevent overheating after the regeneration process, in one optional embodiment, the above-mentioned device further includes:

[0137] The third control unit is used to control the opening of the throttle valve to decrease the upstream temperature of the DPF after controlling the reduction of the throttle valve opening to increase the upstream temperature of the DPF in response to a regeneration request, and after the regeneration time has reached a preset regeneration time.

[0138] Specifically, when the regeneration process reaches the preset regeneration time, to prevent the DPF from remaining in a high-temperature environment, it is necessary to reduce the upstream temperature of the DPF to prevent overheating during the regeneration process. Overheating may cause the DPF to melt or be damaged, thus affecting its regeneration efficiency and lifespan. By controlling and increasing the opening of the throttle valve, the rate at which exhaust gas enters the DPF can be reduced, thereby lowering the upstream temperature of the DPF. This can effectively protect the DPF and extend its service life.

[0139] To promptly detect DPF malfunctions, in one optional embodiment, the above-mentioned apparatus further includes:

[0140] The issuing unit is used to issue an alarm message after controlling the reduction of the throttle valve opening to increase the upstream temperature of the DPF for regeneration in response to a regeneration request, and when the regeneration time reaches a preset regeneration time and the carbon load is greater than or equal to the carbon load threshold. The alarm message is used to indicate that the regeneration process of the DPF has failed.

[0141] Specifically, this is to ensure that the DPF can be regenerated in a timely manner and maintain good working condition. If the regeneration time reaches the preset time but the carbon load is still high, it may mean that the DPF is malfunctioning and unable to effectively remove particulate matter. In this case, issuing an alarm message can promptly remind delivery personnel to check and repair, avoiding problems such as emissions non-compliance and vehicle performance degradation caused by the malfunction. It can also prevent the abnormal vehicle from entering the market or being discovered by customers, thereby reducing repair or return costs. Therefore, issuing an alarm message enables timely detection of problems and the implementation of measures to ensure the normal operation of vehicles and the protection of the environment.

[0142] The aforementioned DPF regeneration control device includes a processor and a memory. The detection unit, the first transmitting unit, and the first control unit are all stored as program units in the memory, and the processor executes the program units stored in the memory to achieve the corresponding functions. All of the above modules are located in the same processor; alternatively, the modules may be located in different processors in any combination.

[0143] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured, and adjusting kernel parameters can address the problem of DPF overload caused by the lack of DPF carbon load detection and regeneration during new vehicle delivery in existing technologies.

[0144] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0145] This invention provides a computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device containing the computer-readable storage medium to perform the DPF regeneration control method.

[0146] Specifically, the control methods for DPF regeneration include:

[0147] Step S201: Real-time detection of carbon loading in the DPF;

[0148] Step S202: If the carbon load is greater than or equal to the carbon load threshold, a regeneration request is sent. The regeneration request is a request to burn the accumulated carbon in the DPF.

[0149] Step S203: In response to the regeneration request, control the reduction of the throttle valve opening to increase the upstream temperature of the DPF for regeneration processing;

[0150] In step S204, when the carbon loading is less than the carbon loading threshold, the opening of the throttle valve is increased to reduce the upstream temperature of the DPF.

[0151] This invention provides a processor for running a program, wherein the program executes the DPF regeneration control method during runtime.

[0152] Step S201: Real-time detection of carbon loading in the DPF;

[0153] Step S202: If the carbon load is greater than or equal to the carbon load threshold, a regeneration request is sent. The regeneration request is a request to burn the accumulated carbon in the DPF.

[0154] Step S203: In response to the regeneration request, control the reduction of the throttle valve opening to increase the upstream temperature of the DPF for regeneration processing;

[0155] In step S204, when the carbon loading is less than the carbon loading threshold, the opening of the throttle valve is increased to reduce the upstream temperature of the DPF.

[0156] This invention provides a vehicle, including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs at least the following steps:

[0157] Step S201: Real-time detection of carbon loading in the DPF;

[0158] Step S202: If the carbon load is greater than or equal to the carbon load threshold, a regeneration request is sent. The regeneration request is a request to burn the accumulated carbon in the DPF.

[0159] Step S203: In response to the regeneration request, control the reduction of the throttle valve opening to increase the upstream temperature of the DPF for regeneration processing;

[0160] In step S204, when the carbon loading is less than the carbon loading threshold, the opening of the throttle valve is increased to reduce the upstream temperature of the DPF.

[0161] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having at least the following method steps:

[0162] Step S201: Real-time detection of carbon loading in the DPF;

[0163] Step S202: If the carbon load is greater than or equal to the carbon load threshold, a regeneration request is sent. The regeneration request is a request to burn the accumulated carbon in the DPF.

[0164] Step S203: In response to the regeneration request, control the reduction of the throttle valve opening to increase the upstream temperature of the DPF for regeneration processing;

[0165] In step S204, when the carbon loading is less than the carbon loading threshold, the opening of the throttle valve is increased to reduce the upstream temperature of the DPF.

[0166] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0167] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied 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.

[0168] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. 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, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0169] 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 1The function specified in one or more boxes.

[0170] 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.

[0171] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0172] Memory may include non-persistent memory 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.

[0173] 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.

[0174] 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 process, method, article, or apparatus. Unless otherwise specified, 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 that element.

[0175] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0176] 1) The DPF regeneration control method of this application firstly detects the carbon load in the DPF in real time; then, if the carbon load is greater than or equal to a carbon load threshold, a regeneration request is sent, which is a request to burn the accumulated carbon in the DPF; subsequently, in response to the regeneration request, the opening of the throttle valve is reduced to raise the upstream temperature of the DPF for regeneration; finally, if the carbon load is less than the carbon load threshold, the opening of the throttle valve is increased to lower the upstream temperature of the DPF. This application triggers a regeneration request when the carbon load exceeds the limit, raises the upstream temperature of the DPF in response to the regeneration request, adjusts the DPF temperature to a set value, and exits the regeneration process when the carbon load is less than the limit. This application solves the problem of DPF overload caused by the failure to detect and regenerate the DPF carbon load during the delivery of new vehicles in the prior art.

[0177] 2) The DPF regeneration control device of this application includes a detection unit for real-time detection of the carbon load in the DPF; a first sending unit for sending a regeneration request when the carbon load is greater than or equal to a carbon load threshold, the regeneration request being a request to burn off the accumulated carbon in the DPF; a first control unit for controlling a reduction in the opening of the throttle valve to raise the upstream temperature of the DPF for regeneration in response to the regeneration request; and a second control unit for controlling an increase in the opening of the throttle valve to lower the upstream temperature of the DPF when the carbon load is less than the carbon load threshold. This application triggers a regeneration request when the carbon load exceeds the limit, raises the upstream temperature of the DPF in response to the regeneration request, adjusts the DPF temperature to a set value, and exits the regeneration process when the carbon load is less than the limit. This application solves the problem in the prior art where the DPF carbon load is not detected and regenerated during the delivery of new vehicles, leading to DPF overload.

[0178] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A control method for DPF regeneration, characterized in that, The post-processor includes a DPF, and a throttle valve is connected to the inlet of the post-processor. The throttle valve is used to control the upstream temperature of the DPF. The method includes: Real-time monitoring of carbon loading within the DPF; If the carbon load is greater than or equal to the carbon load threshold, a regeneration request is sent, which is a request to burn off the accumulated carbon in the DPF. In response to the regeneration request, the opening of the throttle valve is reduced to increase the upstream temperature of the DPF for regeneration. If the carbon loading is less than the carbon loading threshold, the opening of the throttle valve is increased to reduce the upstream temperature of the DPF. If the carbon load is greater than or equal to a carbon load threshold, a regeneration request is sent, including: obtaining the single driving time and total engine running time of the vehicle where the DPF is located, wherein the single driving time is the running time from the start to the stop of the vehicle, and the total engine running time is the cumulative running time from the first start of the vehicle to the current moment; and if a first condition is met, the regeneration request is sent, wherein the first condition is that the carbon load is greater than or equal to the carbon load threshold, the single driving time is greater than or equal to a first time threshold, and the total engine running time is less than or equal to a second time threshold. After obtaining the single-trip time and total engine running time of the vehicle where the DPF is located, the method further includes: if the total engine running time is greater than the second time threshold, the total engine running time will no longer be used as a condition for triggering the regeneration request; if the second condition is met, the regeneration request is sent, wherein the second condition is that the carbon load is greater than or equal to the carbon load threshold and the single-trip time is greater than or equal to the first time threshold.

2. The method according to claim 1, characterized in that, The after-processor also includes a DOC (Diesel Oxide), with the DPF inlet connected to the DOC outlet. Noble metals on the surface of the DOC react with nitric oxide in the exhaust gas to generate nitrogen dioxide. The nitrogen dioxide enters the DPF and undergoes a regeneration reaction with the accumulated carbon. In response to the regeneration request, the opening of the throttle valve is controlled to decrease to increase the upstream temperature of the DPF for regeneration treatment, including: Obtain the noble metal content on the surface of the DOC; The target temperature value is determined by consulting the precious metal oxidation temperature table based on the precious metal content. The precious metal oxidation temperature table is a relationship table between the precious metal content and the target temperature value. The higher the precious metal content, the higher the target temperature value. The opening of the throttle valve is reduced so that the upstream temperature of the DPF is the target temperature value.

3. The method according to claim 2, characterized in that, Before determining the temperature value by consulting a precious metal oxidation temperature table based on the precious metal content, the method further includes: Multiple precious metal samples and multiple carbon samples are obtained, wherein the precious metal content of all the precious metal samples is different, the initial carbon content of all the carbon samples is the same, and the number of precious metal samples is the same as the number of carbon samples. Nitrogen dioxide is obtained by reacting the noble metal sample with the nitric oxide in a redox reaction, and the noble metal sample corresponds one-to-one with the redox reaction. The nitrogen dioxide and the carbon sample are subjected to a regeneration reaction. The reaction temperature of the regeneration reaction is adjusted multiple times within a preset temperature range, and the remaining carbon content of the carbon sample is detected in real time. The oxidation efficiency is calculated based on the remaining carbon content, the initial carbon content, and the reaction time. The reaction temperature corresponding to the maximum value of the oxidation efficiency is determined as the target reaction temperature, which is the temperature value required to perform the regeneration treatment on the precious metal content. Tests were conducted on all the precious metal samples and the carbon samples to obtain a plurality of target reaction temperatures, each of which corresponds one-to-one with a precious metal sample. The noble metal oxidation temperature table is obtained based on all the noble metal samples and the corresponding target reaction temperatures.

4. The method according to claim 1, characterized in that, After controlling the reduction of the throttle valve opening to increase the upstream temperature of the DPF for regeneration in response to the regeneration request, the method further includes: If the regeneration process takes a preset time, the opening of the throttle valve is increased to reduce the upstream temperature of the DPF.

5. The method according to claim 4, characterized in that, After controlling the reduction of the throttle valve opening to increase the upstream temperature of the DPF for regeneration in response to the regeneration request, the method further includes: If the regeneration process takes until the preset regeneration time is reached and the carbon loading is greater than or equal to the carbon loading threshold, an alarm message is issued to indicate that the regeneration process of the DPF has malfunctioned.

6. A control device for DPF regeneration, characterized in that, The post-processor includes a DPF, and a throttle valve is connected to the inlet of the post-processor. The throttle valve is used to control the upstream temperature of the DPF. The device includes: The detection unit is used to detect the carbon loading in the DPF in real time; The first sending unit is configured to send a regeneration request when the carbon load is greater than or equal to a carbon load threshold, wherein the regeneration request is a request to burn the accumulated carbon in the DPF. A first control unit is configured to, in response to the regeneration request, control a reduction in the opening of the throttle valve to increase the upstream temperature of the DPF for regeneration processing; The second control unit is configured to control the increase of the opening of the throttle valve to reduce the upstream temperature of the DPF when the carbon loading is less than the carbon loading threshold. The first sending unit includes: a first acquisition module, configured to acquire the single driving time and total engine running time of the vehicle where the DPF is located, wherein the single driving time is the running time from the start to the stop of the vehicle, and the total engine running time is the cumulative running time from the first start of the vehicle to the current moment; and a sending module, configured to send the regeneration request when a first condition is met, wherein the first condition is that the carbon load is greater than or equal to the carbon load threshold, the single driving time is greater than or equal to a first time threshold, and the total engine running time is less than or equal to a second time threshold. The failure unit is configured to, after obtaining the single driving time and total engine running time of the vehicle where the DPF is located, no longer use the total engine running time as a condition for triggering the regeneration request if the total engine running time is greater than the second time threshold; the second sending unit is configured to send the regeneration request if the second condition is met, wherein the carbon load is greater than or equal to the carbon load threshold and the single driving time is greater than or equal to the first time threshold.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform the method according to any one of claims 1 to 5.

8. A vehicle, characterized in that, include: 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 comprising methods for performing any one of claims 1 to 5.

Images