Method and device for desulfurization of catalyst in vehicle diesel oxidation catalyst (doc), electronic equipment and storage medium

Abstract

This disclosure provides a method for desulfurizing the catalyst in a vehicle oxidation catalyst (DOC), relating to the field of vehicle technology, specifically the field of vehicle aftertreatment technology. The method includes: obtaining the differential pressure change rate of the particulate filter (DPF) after the vehicle has traveled a preset distance; determining whether the differential pressure change rate is greater than or equal to a preset value; if the differential pressure change rate is greater than or equal to the preset value, determining whether the catalyst in the DOC needs desulfurization treatment based on the ignition state of the aftertreatment combustion catalyzed by the catalyst in the DOC; if desulfurization treatment is required, performing desulfurization treatment on the catalyst in the DOC. The embodiments of this disclosure can improve the accuracy of determining sulfur poisoning in the catalyst of the DOC.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, specifically to the field of vehicle aftertreatment technology, and particularly to a method, apparatus, electronic device, and storage medium for desulfurizing the catalyst in a vehicle oxidation catalyst (DOC). Background Technology

[0002] Vehicle aftertreatment refers to the selective reduction of nitrogen oxides into nitrogen and water in an oxygen-rich environment using a catalyst. With increasingly stringent emission regulations, aftertreatment, including combustion aftertreatment, has become standard practice for vehicle exhaust. The catalyst used in this process is indispensable. The catalyst's main components are precious metals such as Pb and Pt, which are highly sensitive to sulfur and have poor sulfur resistance. If diesel engines use substandard fuel, especially fuel with excessive sulfur content, it will directly lead to sulfur poisoning of the aftertreatment catalyst, further reducing the oxidation capacity of the DOC (Diesel Oxidation Catalyst) and affecting the effectiveness of the aftertreatment.

[0003] When the catalyst is poisoned by sulfur, it not only directly affects the oxidation and heat release capacity, but also reduces the ability of NO to be oxidized to NO2. This reduces the NO2 content entering the Diesel Particulate Filter (DPF), slows down the reaction rate between NO2 and soot, and reduces the passive regeneration capacity of the DPF. Ultimately, this leads to DPF blockage or excessive NOx emissions, causing insufficient engine power.

[0004] Therefore, it is necessary to first determine whether the vehicle has experienced sulfur poisoning of the catalyst in the DOC, and if so, to desulfurize the catalyst to achieve detoxification. Summary of the Invention

[0005] In view of this, the purpose of this disclosure is to provide a method, apparatus, electronic device and storage medium for desulfurization of catalyst in a vehicle oxidation catalyst (DOC), which can specifically solve existing problems.

[0006] Based on the above objectives, in a first aspect, this disclosure proposes a method for desulfurizing the catalyst in a vehicle oxidation catalyst (DOC), comprising: obtaining the differential pressure change rate of a particulate filter (DPF) after the vehicle has traveled a preset length; determining whether the differential pressure change rate is greater than or equal to a preset value; if the differential pressure change rate is greater than or equal to the preset value, determining whether the catalyst in the DOC needs to be desulfurized based on the ignition state of the aftertreatment combustion catalyzed by the catalyst in the DOC; and if desulfurization is required, performing desulfurization treatment on the catalyst in the DOC.

[0007] Secondly, an acquisition unit is also provided, configured to acquire the differential pressure change rate of the particulate filter DPF after the vehicle has traveled a preset length; a judgment unit is configured to determine whether the differential pressure change rate is greater than or equal to a preset value; a determination unit is configured to determine whether the catalyst in the DOC needs to be desulfurized based on the ignition state of the aftertreatment combustion catalyzed by the catalyst in the DOC if the differential pressure change rate is greater than or equal to the preset value; and a desulfurization unit is configured to perform desulfurization treatment on the catalyst in the DOC if desulfurization treatment is required.

[0008] Thirdly, an electronic device is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the method described in the first aspect.

[0009] Fourthly, a computer-readable storage medium is also provided, on which a computer program is stored, the program being executed by a processor to implement the method described in any one of the first aspects.

[0010] In summary, this disclosure offers at least the following advantages: by determining the rate of change in DPF pressure differential to reflect the rate of DPF carbon deposition, it indicates whether detoxification is necessary. Furthermore, this embodiment utilizes the ignition state to reconfirm whether the catalyst is sulfur poisoned, thus confirming twice whether sulfur poisoning of the DOC catalyst has occurred. This improves the accuracy of confirming sulfur poisoning and avoids useless detoxification processes caused by incorrect judgment of the poisoning state when the catalyst is not poisoned. Attached Figure Description

[0011] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this disclosure and should not be construed as limiting the scope of this disclosure.

[0012] Figure 1 A flowchart of a desulfurization method for a catalyst in a vehicle oxidation catalyst (DOC) according to an embodiment of the present disclosure is shown;

[0013] Figure 2 Another flowchart of a desulfurization method for a catalyst in a vehicle oxidation catalyst (DOC) according to an embodiment of the present disclosure is shown;

[0014] Figure 3 A schematic diagram illustrating an application scenario according to an embodiment of this disclosure is shown;

[0015] Figure 4A schematic diagram of a desulfurization device for the catalyst in a vehicle oxidation catalyst (DOC) according to an embodiment of the present disclosure is shown;

[0016] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure is shown;

[0017] Figure 6 A schematic diagram of a storage medium provided according to an embodiment of the present disclosure is shown. Detailed Implementation

[0018] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This disclosure illustrates a method for desulfurizing the catalyst in a vehicle oxidation catalyst (DOC). In embodiments of this disclosure, the method includes:

[0021] Step S101: Obtain the differential pressure change rate of the particulate filter DPF after the vehicle has traveled a preset length.

[0022] In this embodiment, the vehicle's processor or an electronic device (such as a server or terminal) connected to the vehicle can be used as the execution subject. Specifically, the execution subject can directly obtain the differential pressure change rate (DPF) from its own device or other electronic devices, or the execution subject can measure the differential pressure change rate. This differential pressure change rate is the rate of change of the DPF pressure of the particulate filter after the vehicle has traveled a preset distance. The particulate filter is present in the vehicle.

[0023] In practice, the preset length can be any set length, such as 100m or 50km, etc.

[0024] Step S102: Determine whether the differential pressure change rate is greater than or equal to a preset value.

[0025] In this embodiment, the aforementioned execution entity can determine whether the differential pressure change rate is greater than or equal to a preset value. Specifically, the preset value refers to a pre-set upper limit for the differential pressure change rate. This upper limit for the differential pressure change rate is an a priori value, referring to the maximum differential pressure change rate of the DPF in a normal vehicle.

[0026] Specifically, the aforementioned executing entity or other electronic equipment can construct a MAP (Map of Pressure Difference Changes) for different types of vehicles before and after the DPF (Digital Pressure Filter): In the laboratory, the changes in DPF carbon deposition rate with mileage for different types of vehicles are investigated, and the results are correlated with the pressure difference changes before and after the DPF, thus obtaining the corresponding DPF pressure difference change rate MAP, denoted as α. In the laboratory, the pressure difference change rate of the DPF when the DOC catalyst undergoes sulfur poisoning is investigated and denoted as the upper limit of the pressure difference change rate α. max .

[0027] Step 103: If the pressure difference change rate is greater than or equal to the preset value, then determine whether the catalyst in the DOC needs to be desulfurized based on the ignition state of the post-treatment combustion catalyzed by the catalyst in the DOC.

[0028] In this embodiment, the aforementioned executing entity can determine whether the catalyst in the DOC needs desulfurization treatment based on the ignition state of the post-treatment combustion, if the determination result shows that the differential pressure change rate is greater than or equal to the preset value. The desulfurization treatment in this application is a preset process.

[0029] The aforementioned post-treatment combustion refers to the combustion catalyzed by the catalyst in the DOC during post-treatment. The purpose of this combustion is to burn off carbon deposits in the DPF. The ignition state indicates whether the temperature upstream of the DOC is greater than or equal to the ignition temperature corresponding to the ignition point of the post-treatment combustion. Once the upstream temperature of the DOC is greater than or equal to this ignition temperature, post-treatment combustion can be achieved after fuel injection. This temperature varies with the degree of sulfidation, or poisoning, of the catalyst in the DOC. The higher the degree of sulfidation, the higher the temperature, and correspondingly, the more difficult the post-treatment combustion.

[0030] The aforementioned implementing entity can determine whether the catalyst in the DOC needs desulfurization treatment based on the ignition state of the post-treatment combustion catalyzed by the catalyst in the DOC using various methods. For example, if a preset temperature (e.g., 300°C) is used upstream of the DOC, and this preset temperature can successfully catalyze the ignition of post-treatment combustion under non-sulfur poisoning conditions, but the current ignition state indicates that the ignition of post-treatment combustion has not been achieved at this preset temperature, then it can be determined that the catalyst in the DOC needs desulfurization treatment.

[0031] Step 104: If desulfurization is required, the catalyst in the DOC is subjected to desulfurization treatment.

[0032] In this embodiment, if the result of determining whether the catalyst in the DOC needs desulfurization is that desulfurization is required, then the executing entity can perform desulfurization on the catalyst in the DOC. Here, desulfurization is a process of detoxifying the catalyst in the DOC.

[0033] This embodiment can reflect the DPF carbon deposition rate by determining the DPF pressure difference change rate, thereby indicating whether detoxification is needed. Furthermore, this embodiment uses the ignition state to reconfirm whether the catalyst is sulfur poisoned, thus confirming the occurrence of sulfur poisoning in the DOC catalyst twice. This improves the accuracy of confirming sulfur poisoning and avoids useless detoxification processes caused by incorrect judgment of the poisoning state when the catalyst is not poisoned.

[0034] Figure 2 This illustration shows a desulfurization method for the catalyst in a vehicle oxidation catalyst (DOC) according to an embodiment of this disclosure. For example... Figure 2 As shown, the desulfurization method includes:

[0035] Step S201: Obtain the differential pressure change rate of the particulate filter DPF after the vehicle has traveled a preset length.

[0036] Step S202: Determine whether the differential pressure change rate is greater than or equal to a preset value.

[0037] Step S203: If the differential pressure change rate is greater than or equal to the preset value, control the upstream temperature of the DOC to be greater than or equal to the preset temperature, and control the fuel injection for after-treatment combustion of the vehicle.

[0038] In this embodiment, the aforementioned actuator can control the upstream temperature of the DOC to be greater than or equal to a preset temperature, such as 300°C, when the differential pressure change rate is greater than or equal to a preset value. Specifically, the actuator can control the vehicle to adjust its speed and torque to be greater than or equal to the preset temperature. Furthermore, the vehicle can also perform fuel injection. Specifically, the fuel injection can be performed according to a preset injection quantity. Thus, if the preset temperature upstream of the DOC is greater than or equal to the ignition point temperature of the aftertreatment combustion, aftertreatment combustion can be performed using the injected fuel and catalyst.

[0039] Step 204: Determine whether the upstream temperature of the DPF is greater than or equal to a temperature threshold, obtain the determination result, and determine whether the catalyst in the DOC needs to be desulfurized based on the determination result.

[0040] In this embodiment, the execution entity can determine whether the upstream temperature of the DPF is greater than or equal to a temperature threshold, thereby obtaining a determination result. Then, the execution entity can determine whether the DOC needs desulfurization treatment based on the determination result. For example, if the determination result is that the upstream temperature of the DPF is greater than or equal to the temperature threshold, the execution entity can determine that the DOC needs desulfurization treatment.

[0041] Step 205: If desulfurization is required, the catalyst in the DOC is subjected to desulfurization treatment.

[0042] This embodiment can control the upstream temperature of the DOC and perform oil injection, providing conditions that meet the post-treatment ignition point of the catalyst in the un-sulfur-poisoned DOC. Thus, by judging whether the catalyst in the DOC can achieve the ignition of post-treatment combustion, it can be accurately determined whether the catalyst in the DOC needs to undergo desulfurization treatment.

[0043] In some optional implementations of this embodiment, determining whether the catalyst in the DOC needs desulfurization based on the judgment result may include: if the upstream temperature of the DPF is greater than or equal to the temperature threshold, then it is determined that the catalyst in the DOC does not need desulfurization; if the upstream temperature of the DPF is less than the temperature threshold, then it is determined that the catalyst in the DOC needs desulfurization.

[0044] In these implementations, if the upstream temperature of the DPF is greater than or equal to the temperature threshold, it proves that the catalytic converter of the vehicle's DOC has reached or exceeded the aftertreatment ignition point, meaning aftertreatment combustion has occurred, indicating that the catalyst in the DOC is not currently sulfur poisoned. The aforementioned executing entity can determine in this case that the catalyst in the DOC does not require desulfurization treatment. If the upstream temperature of the DPF is less than the temperature threshold, it indicates that there is no ignition point greater than or equal to the aftertreatment combustion point, and aftertreatment combustion has not occurred; therefore, it is determined that the catalyst in the DOC requires desulfurization treatment.

[0045] These methods can accurately determine whether the catalyst in the DOC needs desulfurization treatment by using the upstream temperature of the DPF.

[0046] In some optional implementations of any embodiment of this disclosure, obtaining the differential pressure change rate of the particulate filter DPF after the vehicle has traveled a preset length may include: controlling the vehicle to travel the preset length a target number of times, obtaining the differential pressure change rate of the DPF after each trip, and using the differential pressure change rate corresponding to each trip as the differential pressure change rate of the particulate filter DPF.

[0047] In these implementations, the aforementioned execution entity can travel a preset length a target number of times, for example, three times. Thus, the execution entity can travel the preset length three times. After each trip to the preset length, the execution entity can obtain the differential pressure change rate of the vehicle's DPF.

[0048] The aforementioned execution entity can use the differential pressure change rate of all trips as the differential pressure change rate of the particulate filter (DPF) to determine whether it is greater than or equal to a preset value. If the differential pressure change rate of all trips is greater than or equal to the preset value, the aforementioned execution entity can determine that the differential pressure change rate is greater than or equal to the preset value.

[0049] These methods allow the vehicle to travel a preset length multiple times consecutively, thus providing an initial indication of whether the catalyst in the DOC is poisoned by sulfur.

[0050] In some optional implementations of any embodiment of this disclosure, the desulfurization treatment of the catalyst in the DOC includes: performing desulfurization treatment on the catalyst in the DOC, and then determining again whether the DOC needs desulfurization treatment; if desulfurization treatment is not required, the entire process is terminated.

[0051] In these implementation methods, the aforementioned implementing entity can perform desulfurization treatment, and after each desulfurization treatment, determine whether the DOC needs further desulfurization treatment, obtaining a determination result until the determination result is that no desulfurization treatment is required, at which point there is no need to perform desulfurization treatment on the catalyst in the DOC. If the determination result is that desulfurization treatment is required, then desulfurization treatment is performed again.

[0052] These methods allow for continuous desulfurization when necessary, until desulfurization is successful, thus enabling the complete detoxification of the catalyst in DOC.

[0053] In some optional implementations of any embodiment of this disclosure, the vehicle has an indicator light for displaying to the driver; the method includes illuminating the indicator light if the differential pressure change rate is greater than or equal to the preset value.

[0054] In these implementations, if the result of determining whether the differential pressure change rate is greater than or equal to a preset value is that the differential pressure change rate is greater than or equal to the preset value, then the aforementioned actuator can illuminate an indicator light for the driver. This indicator light is used to indicate the possibility of sulfur poisoning in the catalyst within the DOC.

[0055] After the indicator light illuminates, the driver can select a safe area and trigger a sulfur poisoning detection at idle speed to determine whether the catalyst in the DOC needs desulfurization treatment.

[0056] These methods can use indicator lights to prompt the driver to trigger the sulfur poisoning detection, thereby further accurately determining whether sulfur poisoning has occurred in the catalyst in the DOC.

[0057] In some optional implementations of any embodiment of this disclosure, the desulfurization treatment includes the following steps: controlling the vehicle to perform fuel injection for aftertreatment combustion, and performing desulfurization treatment for a preset duration.

[0058] In these implementation methods, the aforementioned implementing entity can use a post-injection method to inject fuel for post-treatment combustion, thereby achieving desulfurization of the catalyst through post-treatment combustion.

[0059] These methods can achieve the detoxification process of the catalyst through a pre-set desulfurization time, allowing the catalyst to be fully desulfurized.

[0060] This disclosure provides a desulfurization device for the catalyst in a vehicle oxidation catalyst (DOC), which is used to perform the desulfurization method for the catalyst in the vehicle oxidation catalyst (DOC) described in the above embodiments. Figure 4 As shown, the device includes: an acquisition unit 401 configured to acquire the pressure difference change rate of the particulate filter DPF after the vehicle has traveled a preset length; a judgment unit 402 configured to determine whether the pressure difference change rate is greater than or equal to a preset value; a determination unit 403 configured to determine whether the catalyst in the DOC needs desulfurization treatment based on the ignition state of the aftertreatment combustion catalyzed by the catalyst in the DOC if the pressure difference change rate is greater than or equal to the preset value; and a desulfurization unit 404 configured to perform desulfurization treatment on the catalyst in the DOC if desulfurization treatment is required.

[0061] Optionally, the determining unit is further configured to perform the following steps: determining whether the catalyst in the DOC needs desulfurization treatment based on the ignition state of the aftertreatment combustion catalyzed by the catalyst in the DOC: controlling the upstream temperature of the DOC to be greater than or equal to a preset temperature, and controlling the fuel injection of the vehicle for aftertreatment combustion; determining whether the upstream temperature of the DPF is greater than or equal to a temperature threshold, obtaining a determination result, and determining whether the catalyst in the DOC needs desulfurization treatment based on the determination result.

[0062] Optionally, determining whether the catalyst in the DOC needs desulfurization treatment based on the judgment result includes: if the upstream temperature of the DPF is greater than or equal to the temperature threshold, then determining that the catalyst in the DOC does not need desulfurization treatment; if the upstream temperature of the DPF is less than the temperature threshold, then determining that the catalyst in the DOC needs desulfurization treatment.

[0063] Optionally, the acquisition unit is further configured to acquire the differential pressure change rate of the particulate filter DPF after the vehicle has traveled a preset length in the following manner: controlling the vehicle to travel the preset length a target number of times, acquiring the differential pressure change rate of the DPF after each trip; and using the differential pressure change rate corresponding to each trip as the differential pressure change rate of the particulate filter DPF.

[0064] Optionally, the desulfurization unit is further configured to perform the desulfurization treatment on the catalyst in the DOC in the following manner: desulfurize the catalyst in the DOC, and determine again whether the DOC needs to be desulfurized; if desulfurization is not required, the entire process is terminated.

[0065] Optionally, the vehicle has an indicator light for displaying to the driver; the device is also configured to illuminate the indicator light if the differential pressure change rate is greater than or equal to the preset value.

[0066] Optionally, the desulfurization treatment includes the following steps: controlling the fuel injection for aftertreatment combustion in the vehicle to perform desulfurization treatment for a preset duration.

[0067] The desulfurization device for the catalyst in the vehicle oxidation catalyst DOC provided in the above embodiments of this disclosure and the desulfurization method for the catalyst in the vehicle oxidation catalyst DOC provided in the embodiments of this disclosure are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the applications stored therein.

[0068] This disclosure also provides an electronic device corresponding to the desulfurization method for the catalyst in a vehicle oxidation catalyst DOC provided in the foregoing embodiments, for performing the aforementioned desulfurization method for the catalyst in a vehicle oxidation catalyst DOC. This disclosure is not limiting.

[0069] Please refer to Figure 5 This illustrates a schematic diagram of an electronic device provided by some embodiments of the present disclosure. For example... Figure 5 As shown, the electronic device 50 includes: a processor 500, a memory 501, a bus 502, and a communication interface 503. The processor 500, the communication interface 503, and the memory 501 are connected via the bus 502. The memory 501 stores a computer program that can run on the processor 500. When the processor 500 runs the computer program, it executes the method provided in any of the foregoing embodiments of this disclosure.

[0070] The memory 501 may include high-speed random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 503 (which can be wired or wireless), such as the Internet, wide area network, local area network, or metropolitan area network.

[0071] Bus 502 can be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into address bus, data bus, control bus, etc. Memory 501 is used to store programs. After receiving an execution instruction, processor 500 executes the program. The desulfurization method of the catalyst in the vehicle oxidation catalyst DOC disclosed in any of the foregoing embodiments of this disclosure can be applied to processor 500, or implemented by processor 500.

[0072] The processor 500 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of the processor 500 or by instructions in software form. The processor 500 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this disclosure. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this disclosure can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 501. The processor 500 reads the information in memory 501 and, in conjunction with its hardware, completes the steps of the above method.

[0073] The electronic equipment provided in this disclosure and the desulfurization method of the catalyst in the vehicle oxidation catalyst DOC provided in this disclosure are based on the same inventive concept and have the same beneficial effects as the methods used, operated or implemented therein.

[0074] This disclosure also provides a computer-readable storage medium corresponding to the desulfurization method for the catalyst in the vehicle oxidation catalyst DOC provided in the foregoing embodiments. Please refer to... Figure 6 The computer-readable storage medium shown is an optical disc 60, on which a computer program (i.e., a program product) is stored. When the computer program is run by a processor, it executes the desulfurization method of the catalyst in the vehicle oxidation catalyst DOC provided in any of the foregoing embodiments.

[0075] It should be noted that examples of the computer-readable storage medium may also 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 optical and magnetic storage media, which will not be elaborated here.

[0076] The computer-readable storage medium provided in the above embodiments of this disclosure and the desulfurization method of the catalyst in the vehicle oxidation catalyst DOC provided in the embodiments of this disclosure are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the applications stored therein.

[0077] It should be noted that:

[0078] In the foregoing text, the terms "comprising," "including," or any other variations thereof are intended to cover a 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 that element. Furthermore, it should be noted that the scope of the methods and apparatuses in this disclosure is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0079] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this disclosure.

[0080] The embodiments of this disclosure have been described above with reference to the accompanying drawings. These are merely specific implementations of this disclosure, but this disclosure is not limited to the specific implementations described above. The specific implementations described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this disclosure without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this disclosure.

Claims

1. A method for desulfurizing the catalyst in a vehicle oxidation catalyst (DOC), characterized in that, include: The rate of change of pressure difference of the particulate filter DPF is obtained after the vehicle has traveled a preset length; Determine whether the rate of change of pressure difference is greater than or equal to a preset value; If the pressure difference change rate is greater than or equal to the preset value, then it is determined whether the catalyst in the DOC needs to undergo desulfurization treatment based on the ignition state of the post-treatment combustion catalyzed by the catalyst in the DOC. If desulfurization is required, the catalyst in the DOC shall be desulfurized. The step of determining whether the catalyst in the DOC needs desulfurization treatment based on the ignition state of the post-treatment combustion catalyzed by the catalyst in the DOC includes: Controlling the upstream temperature of the DOC to be greater than or equal to a preset temperature, and controlling the fuel injection for after-treatment combustion in the vehicle; Determine whether the upstream temperature of the DPF is greater than or equal to a temperature threshold, obtain the determination result, and determine whether the catalyst in the DOC needs to undergo desulfurization treatment based on the determination result; The step of obtaining the rate of change of pressure difference of the particulate filter DPF after the vehicle has traveled a preset length includes: The vehicle is controlled to travel the preset length a target number of times, and the pressure difference change rate of the DPF is obtained after each trip. The rate of change of pressure difference corresponding to each trip is taken as the rate of change of pressure difference of the particulate filter DPF. The desulfurization treatment of the catalyst in the DOC includes: The catalyst in the DOC is subjected to desulfurization treatment, and it is determined again whether the DOC needs to be desulfurized. If desulfurization treatment is not required, the entire process ends. The desulfurization process includes the following steps: The fuel injection for aftertreatment combustion in the vehicle is controlled to desulfurize the catalyst for a preset time.

2. The method according to claim 1, characterized in that, The step of determining whether the catalyst in the DOC needs desulfurization treatment based on the judgment result includes: If the upstream temperature of the DPF is greater than or equal to the temperature threshold, then it is determined that the catalyst in the DOC does not need to undergo desulfurization treatment. If the upstream temperature of the DPF is lower than the temperature threshold, then the catalyst in the DOC needs to undergo desulfurization treatment.

3. The method according to claim 1, characterized in that, The vehicle has indicator lights for displaying information to the driver; the method further includes: If the differential pressure change rate is greater than or equal to the preset value, the indicator light will be illuminated.

4. A desulfurization apparatus for a catalyst in a vehicle oxidation catalyst (DOC) for performing the method as described in any one of claims 1-3, characterized in that, include: The acquisition unit is configured to acquire the rate of change of pressure difference of the particulate filter DPF after the vehicle has traveled a preset length; The judgment unit is configured to determine whether the differential pressure change rate is greater than or equal to a preset value; The determining unit is configured to determine whether the catalyst in the DOC needs to undergo desulfurization treatment based on the ignition state of the post-treatment combustion catalyzed by the catalyst in the DOC if the differential pressure change rate is greater than or equal to the preset value. The desulfurization unit is configured to desulfurize the catalyst in the DOC if desulfurization is required.

5. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to implement the method as described in any one of claims 1-3.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by a processor to implement the method as described in any one of claims 1-3.

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