Method, system and electronic device for controlling the regeneration hc critical injection quantity

Abstract

The application provides a control method and system for regenerative HC critical injection amount and an electronic device, relates to the technical field of vehicle manufacturing, and is applied to a test device for regenerative HC critical injection amount. The test device comprises a thermocouple. The thermocouple is arranged at a cross section of an exhaust pipe at a preset length from a DOC outlet. The control method for regenerative HC critical injection amount comprises the following steps: determining HC injection amount critical values under different working conditions before and after DOC aging by using a thermocouple test method; determining a post-injection demand; and determining HC injection amount according to the HC injection amount critical values under different working conditions before and after DOC aging and the post-injection demand. The technical problem that DOC high-temperature deactivation, cracking or local ablation of a DOC carrier due to uneven temperature may exist in the closed-loop control of HC injection mainly relying on the exhaust temperature upstream of a DPF is solved.

Description

Technical Field

[0001] This invention relates to the field of vehicle manufacturing technology, and specifically to a method, system, and electronic device for controlling the critical injection quantity of regenerated HC. Background Technology

[0002] DOC stands for Diesel Oxidation Catalyst. DOC supports can be ceramic or metal. Ceramic supports are typically cordierite, while metal supports include iron, copper, and brass. A coating is applied to the support, primarily composed of precious metals such as platinum, iridium, and palladium. These precious metals used in the coating mainly function as catalysts.

[0003] The main function of DOC (Distillation Oxide) in a diesel engine aftertreatment system is to oxidize HC (Hydrogen Hydrogen) injected into the exhaust pipe, releasing heat to bring the exhaust temperature after DOC to the system's set temperature. Current control strategies primarily rely on closed-loop control of HC injection based on the exhaust temperature upstream of the DPF (Distillation Processor Filter). HC injection occurs when the temperature before the DPF is lower than the target setpoint, and is maintained for a certain period after the temperature reaches the target setpoint until regeneration is complete.

[0004] However, during regeneration, due to the uneven distribution of HC in the cross-section before DOC, some areas may fail to ignite and liquid fuel may accumulate. This results in the temperature after DOC not reaching the target temperature. According to the current control strategy, the HC injection volume will continue to increase, causing a large amount of liquid diesel to accumulate in local areas of DOC. After ignition, this may cause high-temperature deactivation of DOC, cracking of DOC carrier due to uneven temperature, or localized ablation. Summary of the Invention

[0005] This application provides a method, system, and electronic equipment for controlling the critical injection quantity of regenerated HC, in order to at least solve the technical problems existing in the related art.

[0006] According to one aspect of the embodiments of this application, a method for controlling the critical injection quantity of regenerated HC is provided, applied to a testing device for the critical injection quantity of regenerated HC, the testing device including a thermocouple disposed in a cross-section of the exhaust pipe at a predetermined length from the DOC outlet; the method for controlling the critical injection quantity of regenerated HC includes:

[0007] The critical values ​​of HC injection amount under different operating conditions before and after DOC aging were determined by thermocouple testing.

[0008] Determine the required amount of spray afterward;

[0009] The HC injection volume is determined based on the critical value of HC injection volume under different operating conditions before and after DOC aging and the post-injection demand.

[0010] As an optional implementation, determining the HC injection quantity based on the critical value of HC injection quantity under different operating conditions before and after DOC aging and the post-injection demand includes: determining the maximum injection quantity Map of DOC in fresh and aged states based on the critical value of HC injection quantity under different operating conditions before and after DOC aging; determining the maximum injection quantity of DOC under the current operating condition based on the maximum injection quantity Map; and determining the HC injection quantity based on the post-injection demand and the maximum injection quantity.

[0011] As an optional implementation, determining the maximum fuel injection quantity of DOC under the current operating conditions based on the maximum fuel injection quantity Map includes: determining the maximum fresh fuel injection quantity and the maximum aged fuel injection quantity that DOC can withstand under normal operating conditions based on the maximum fuel injection quantity Map; and determining the maximum fuel injection quantity of DOC based on the maximum fresh fuel injection quantity, the maximum aged fuel injection quantity, and the aging correction coefficient.

[0012] As an optional implementation, the aging correction coefficient is determined based on the cumulative value of regeneration time and / or the maximum aging time.

[0013] As an optional implementation, determining the HC injection quantity based on the post-injection demand and the maximum injection quantity includes: determining whether the post-injection demand is greater than the maximum injection quantity; if the post-injection demand is greater than the maximum injection quantity, then the HC injection quantity is the maximum injection quantity; if the post-injection demand is less than or equal to the maximum injection quantity, then the HC injection quantity is the post-injection demand.

[0014] As an optional implementation, the number of thermocouples is multiple, and they are evenly arranged in the cross section of the exhaust pipe at a preset length from the DOC outlet.

[0015] As an optional implementation, the plurality of thermocouples are arranged radially with the center of the exhaust pipe as the center.

[0016] According to another aspect of the embodiments of this application, a test system for the critical injection quantity of regenerated HC is also provided, connected to the test device for the critical injection quantity of regenerated HC. The test system for the critical injection quantity of regenerated HC includes: an HC injection quantity critical value determination module, used to determine the critical value of HC injection quantity under different operating conditions before and after DOC aging using a thermocouple test method; a post-injection demand determination module, used to determine the post-injection demand; and an HC injection quantity determination module, used to determine the HC injection quantity based on the critical value of HC injection quantity under different operating conditions before and after DOC aging and the post-injection demand.

[0017] According to another aspect of the embodiments of this application, an electronic device is provided, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus, the memory is used to store a computer program, and the processor is used to execute the steps of the method for controlling the critical injection quantity of regenerated HC by running the computer program stored in the memory.

[0018] According to another aspect of the embodiments of this application, a computer-readable storage medium is provided, the storage medium storing a computer program, wherein the computer program is configured to execute the steps of the method for controlling the critical injection quantity of regenerated HC when running.

[0019] In this embodiment, a method for controlling the critical injection quantity of regenerated HC is provided, applied to a testing device for the critical injection quantity of regenerated HC. The testing device includes a thermocouple, which is positioned at a cross-section within the exhaust pipe at a predetermined length from the DOC outlet. Positioning the thermocouple at this predetermined length effectively prevents the thermocouple from being blown out by the exhaust gas, which could lead to the failure of subsequent control methods. The method for controlling the critical injection quantity of regenerated HC includes: determining the critical HC injection quantity value under different operating conditions before and after DOC aging using a thermocouple testing method; determining the post-injection demand; and determining the HC injection quantity based on the critical HC injection quantity value under different operating conditions before and after DOC aging and the post-injection demand. The above control method solves the technical problem that the existing technology, which mainly relies on the exhaust temperature upstream of the DPF for HC injection closed-loop control, may have issues during regeneration. Due to the uneven distribution of HC in the cross section before the DOC, some areas may not be able to ignite and liquid fuel may accumulate. As a result, if the temperature after the DOC cannot reach the target temperature, the HC injection volume will continue to increase, and a large amount of liquid diesel will accumulate in the local area of ​​the DOC. After ignition, it may cause high-temperature deactivation of the DOC, cracking or local ablation of the DOC carrier due to uneven temperature. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1This is a schematic flowchart of an optional method for controlling the critical injection quantity of regenerated HC according to an embodiment of this application;

[0023] Figure 2 This is a maximum fuel injection volume map for fresh and aged DOC states provided according to embodiments of this application;

[0024] Figure 3 This is a structural block diagram of an optional electronic device according to an embodiment of this application. Detailed Implementation

[0025] 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.

[0026] 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 so that the embodiments of this application described herein can be implemented in orders other than those illustrated or 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.

[0027] DOC stands for Diesel Oxidation Catalyst. DOC supports can be ceramic or metal. Ceramic supports are typically cordierite, while metal supports include iron, copper, and brass. A coating is applied to the support, primarily composed of precious metals such as platinum, iridium, and palladium. These precious metals used in the coating mainly function as catalysts.

[0028] The main function of DOC (Distillation Oxide) in a diesel engine aftertreatment system is to oxidize HC (Hydrogen Hydrogen) injected into the exhaust pipe, releasing heat to bring the exhaust temperature after DOC to the system's set temperature. Current control strategies primarily rely on closed-loop control of HC injection based on the exhaust temperature upstream of the DPF (Distillation Processor Filter). HC injection occurs when the temperature before the DPF is lower than the target setpoint, and is maintained for a certain period after the temperature reaches the target setpoint until regeneration is complete.

[0029] However, during regeneration, due to the uneven distribution of HC in the cross-section before DOC, some areas may fail to ignite and liquid fuel may accumulate. This results in the temperature after DOC not reaching the target temperature. According to the current control strategy, the HC injection volume will continue to increase, causing a large amount of liquid diesel to accumulate in local areas of DOC. After ignition, this may cause high-temperature deactivation of DOC, cracking of DOC carrier due to uneven temperature, or localized ablation.

[0030] like Figure 1 As shown, this application provides a method for controlling the critical injection quantity of regenerated HC, applied to a testing device for the critical injection quantity of regenerated HC. The testing device includes a thermocouple, which is disposed in a cross-section inside the exhaust pipe at a predetermined length from the DOC outlet. The method for testing the critical injection quantity of regenerated HC includes:

[0031] S1 uses thermocouple testing to determine the critical value of HC injection amount under different operating conditions before and after DOC aging;

[0032] S2 determines the required spray volume;

[0033] S3 determines the HC injection amount based on the critical value of HC injection amount under different operating conditions before and after DOC aging and the post-injection demand.

[0034] Specifically, the testing device includes a thermocouple positioned at a predetermined length from the DOC outlet within the exhaust pipe. After HC injection, the HC oxidizes inside the DOC, and the temperature gradually increases from the DOC inlet to the outlet. The DOC outlet temperature is closest to the upstream temperature of the DPF. Therefore, placing the thermocouple near the DOC outlet is crucial. Since the thermocouple is inserted from the DOC outlet, a shallow insertion depth could lead to it being blown out by the exhaust gas. This technical feature effectively prevents the thermocouple from being blown out by the exhaust gas, which could cause subsequent control methods to fail. The thermocouple is positioned at a certain distance from the DOC outlet to measure the bed temperature inside the DOC. Due to differences in space velocity in different regions, the temperature varies during regeneration. With a constant upstream temperature and space velocity, as the HC injection quantity increases, an unignitable zone appears inside the DOC. Continuing to increase the HC injection quantity further increases the number of unignitable zones. The moment when the temperature in a certain zone begins to decrease is the critical HC injection quantity for that zone at that temperature / space velocity. The method for controlling the critical injection quantity of regenerated HC includes: determining the critical value of HC injection quantity under different operating conditions before and after DOC aging using thermocouple testing; determining the post-injection demand; and determining the HC injection quantity based on the critical value of HC injection quantity under different operating conditions before and after DOC aging and the post-injection demand. This control method avoids solely relying on the temperature upstream of the DPF to control HC injection. Instead, it determines the HC injection quantity based on the critical value of HC injection quantity under different operating conditions before and after DOC aging and the post-injection demand. This solves the technical problem that existing closed-loop control methods, which mainly rely on the exhaust temperature upstream of the DPF for HC injection, may suffer from uneven HC distribution in the cross-section before DOC during regeneration. This can lead to areas where ignition is impossible and liquid fuel accumulates, causing the temperature after DOC to fail to reach the target temperature. Consequently, the HC injection quantity may increase further, resulting in a large accumulation of liquid diesel in localized areas of the DOC. Ignition of this liquid diesel could then cause high-temperature deactivation of the DOC, cracking of the DOC carrier due to uneven temperature, or localized ablation.

[0035] It should be noted that this application does not limit the specific distance between the thermocouple and the DOC outlet; preferably, 1.5 cm can be used.

[0036] In addition, after the post-treatment packaging design is determined, the critical value of HC injection quantity under different operating conditions can be obtained by the above method, thereby limiting the amount of regenerated fuel injection.

[0037] like Figure 2As shown, as an optional implementation, determining the HC injection quantity based on the critical value of HC injection quantity under different operating conditions before and after DOC aging and the post-injection demand includes: determining the maximum injection quantity Map of DOC in fresh and aged states based on the critical value of HC injection quantity under different operating conditions before and after DOC aging; determining the maximum injection quantity of DOC under the current operating condition based on the maximum injection quantity Map; and determining the HC injection quantity based on the post-injection demand and the maximum injection quantity.

[0038] As an optional implementation, determining the maximum fuel injection quantity of DOC under the current operating conditions based on the maximum fuel injection quantity Map includes: determining the maximum fresh fuel injection quantity and the maximum aged fuel injection quantity that DOC can withstand under normal operating conditions based on the maximum fuel injection quantity Map; and determining the maximum fuel injection quantity of DOC based on the maximum fresh fuel injection quantity, the maximum aged fuel injection quantity, and the aging correction coefficient.

[0039] As an optional implementation, the aging correction coefficient is determined based on the cumulative value of regeneration time and / or the maximum aging time.

[0040] As an optional implementation, determining the HC injection quantity based on the post-injection demand and the maximum injection quantity includes: determining whether the post-injection demand is greater than the maximum injection quantity; if the post-injection demand is greater than the maximum injection quantity, then the HC injection quantity is the maximum injection quantity; if the post-injection demand is less than or equal to the maximum injection quantity, then the HC injection quantity is the post-injection demand.

[0041] Specifically, thermocouple testing can be used to measure the critical values ​​of HC injection quantity under different operating conditions before and after aging of the DOC, generating a map of the maximum injection quantity of the DOC in its fresh and aged states. For example, ... Figure 2As shown, during regeneration, the maximum after-injection quantities FDctm_qlimNew and FDctm_qlimOld that the DOC can withstand under normal operating conditions are obtained according to the maximum injection quantity Map. The maximum injection quantity FDctm_qmax = FDctm_qlimNew - (FDctm_qlimNew - FDctm_qlimOld) * FDctm_qlimOldCor_mp. The aging correction coefficient FDctm_qlimOldCor_mp can be calculated by dividing the cumulative regeneration time by the maximum aging time of 25 hours: Aging correction coefficient FDctm_qlimOldCor_mp = T1 / T2, where T1 is the cumulative engine regeneration time, which can be automatically recorded and accumulated by the ECU each time regeneration occurs; T2 is the maximum aging time of the DOC, calculated based on the effective lifespan of the aftertreatment, the regeneration mileage, and the single regeneration time. The effective lifespan of the aftertreatment and the regeneration mileage are reported during certification as required by regulations, while the single regeneration time is specified in the strategy. T2 = Aftertreatment effective life / Regeneration mileage * Single regeneration time. When T1 > T2, FDctm_qlimOldCor_mp = 1. The required fuel quantity q for post-injection can be obtained from the fuel quantity calculation module based on the engine's existing strategy. It can be calculated based on the upstream temperature of DPF, the upstream temperature of DOC, the thermal efficiency of fuel, and the closed-loop fuel quantity. That is, when the upstream temperature of DOC and the space velocity are constant, the required injection quantity to reach the target temperature of DPF is calculated based on the thermal efficiency of fuel. Finally, when the engine is regenerating under a certain operating condition, the required fuel quantity q for post-injection is compared with FDctm_qmax. If q ≤ FDctm_qmax, then continue to inject according to q (q_act = q); if q > FDctm_qmax, then inject according to qmax (q_act = qmax) to avoid excessive HC leakage.

[0042] As an optional implementation, the number of thermocouples is multiple, and they are evenly arranged in the cross section of the exhaust pipe at a preset length from the DOC outlet.

[0043] As an optional implementation, the plurality of thermocouples are arranged radially with the center of the exhaust pipe as the center.

[0044] The above configuration allows the thermocouple to measure the temperature at the DOC outlet more evenly and accurately, thereby improving the accuracy and reliability of HC control.

[0045] According to another aspect of the embodiments of this application, a test system for the critical injection quantity of regenerated HC is also provided, connected to the test device for the critical injection quantity of regenerated HC, the test system for the critical injection quantity of regenerated HC comprising:

[0046] The HC injection quantity critical value determination module is used to determine the critical value of HC injection quantity under different operating conditions before and after DOC aging using the thermocouple test method.

[0047] The rear spray demand determination module is used to determine the rear spray demand.

[0048] The HC injection quantity determination module is used to determine the HC injection quantity based on the critical value of HC injection quantity under different operating conditions before and after DOC aging and the post-injection demand.

[0049] Figure 3 This is a structural block diagram of an optional electronic device according to an embodiment of this application, such as... Figure 3 As shown, it includes a processor 202, a communication interface 204, a memory 206, and a communication bus 208. The processor 202, communication interface 204, and memory 206 communicate with each other via the communication bus 208.

[0050] Memory 206 is used to store computer programs;

[0051] When processor 202 executes a computer program stored in memory 206, it performs the following steps:

[0052] The critical values ​​of HC injection amount under different operating conditions before and after DOC aging were determined by thermocouple testing.

[0053] Determine the required amount of spray afterward;

[0054] The HC injection volume is determined based on the critical value of HC injection volume under different operating conditions before and after DOC aging and the post-injection demand.

[0055] According to another aspect of the embodiments of this application, an electronic device for controlling the critical injection quantity of regenerated HC is also provided. The electronic device may be a server, a terminal, or a combination thereof.

[0056] The communication interface is used for communication between the aforementioned electronic devices and other devices.

[0057] The memory may include RAM, or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0058] Other modules and units in the above-mentioned test system for the critical injection quantity of regenerated HC may also be included, but will not be described in detail in this example.

[0059] According to another aspect of the embodiments of this application, a storage medium is also provided. Optionally, in this embodiment, the storage medium can be used to execute program code for a method for controlling the critical injection quantity of regenerated HC.

[0060] Optionally, in this embodiment, the storage medium may be located on at least one of the network devices in the network shown in the above embodiment.

[0061] Optionally, in this embodiment, the storage medium is configured to store program code for performing the following steps:

[0062] The critical values ​​of HC injection amount under different operating conditions before and after DOC aging were determined by thermocouple testing.

[0063] Determine the required amount of spray afterward;

[0064] The HC injection volume is determined based on the critical value of HC injection volume under different operating conditions before and after DOC aging and the post-injection demand.

[0065] Specific examples in this embodiment can be found in the examples described in the above embodiments, and will not be repeated here.

[0066] Optionally, in this embodiment, the storage medium may include, but is not limited to, various media capable of storing program code, such as USB flash drives, ROMs, RAMs, portable hard drives, magnetic disks, or optical disks.

[0067] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0068] If the integrated units in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in the aforementioned computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause one or more electronic devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0069] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0070] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection between units or modules, and may be electrical or other forms.

[0071] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the solution provided in this embodiment, depending on actual needs.

[0072] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0073] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0074] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for controlling the critical injection quantity of regenerated HC, characterized in that, A testing device for the critical injection quantity of regenerated HC is provided, the testing device including a thermocouple disposed at a predetermined length from the DOC outlet in the exhaust pipe; the method for controlling the critical injection quantity of regenerated HC includes: The critical values ​​of HC injection amount under different operating conditions before and after DOC aging were determined by thermocouple testing. Determine the required amount of spray afterward; The HC injection quantity is determined based on the critical value of HC injection quantity under different operating conditions before and after DOC aging and the post-injection demand. The step of determining the HC injection volume based on the critical value of HC injection volume under different operating conditions before and after DOC aging and the post-injection demand includes: The maximum fuel injection quantity Map of DOC in fresh and aged states is determined based on the critical value of HC injection quantity under different operating conditions before and after DOC aging. The maximum fuel injection quantity of DOC under the current operating condition is determined based on the maximum fuel injection quantity Map. The HC injection quantity is determined based on the post-injection demand and the maximum injection quantity. Determining the maximum fuel injection quantity of DOC under the current operating condition based on the maximum fuel injection quantity Map includes: Based on the maximum injection volume Map, determine the maximum post-injection volume in the fresh state and the maximum post-injection volume in the aged state that the DOC can withstand under the current working conditions. The maximum fuel injection quantity of DOC is determined based on the maximum post-injection quantity in the fresh state, the maximum post-injection quantity in the aged state, and the aging correction coefficient. The aging correction coefficient is determined based on the cumulative value of regeneration time and / or the maximum aging time; The step of determining the HC injection quantity based on the post-injection demand and the maximum injection quantity includes: Determine whether the required amount of post-injection fuel is greater than the maximum fuel injection amount; If the post-injection demand is greater than the maximum injection quantity, then the HC injection quantity is the maximum injection quantity; If the post-injection demand is less than or equal to the maximum injection quantity, then the HC injection quantity is the post-injection demand.

2. The method for controlling the critical injection quantity of regenerated HC as described in claim 1, characterized in that, The thermocouples are multiple and are evenly distributed in the exhaust pipe at a predetermined distance from the DOC outlet.

3. The method for controlling the critical injection quantity of regenerated HC as described in claim 1, characterized in that, The thermocouples are arranged radially around the center of the exhaust pipe.

4. A testing system for the critical injection quantity of regenerated HC, characterized in that, Connected to the testing device for the critical injection quantity of regenerated HC as described in claim 1, the testing system for the critical injection quantity of regenerated HC comprises: The HC injection quantity critical value determination module is used to determine the critical value of HC injection quantity under different operating conditions before and after DOC aging using the thermocouple test method. The rear spray demand determination module is used to determine the rear spray demand. The HC injection quantity determination module is used to determine the HC injection quantity based on the critical value of HC injection quantity under different operating conditions before and after DOC aging and the post-injection demand.

5. An electronic device, comprising a processor, a communication interface, a memory, and a communication bus, wherein, The processor, the communication interface, and the memory communicate with each other via the communication bus, characterized in that... The memory is used to store computer programs; The processor is configured to execute the steps of the method for controlling the critical injection quantity of regenerated HC as described in any one of claims 1 to 4 by running the computer program stored in the memory.

6. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, wherein the computer program is configured to execute the steps of the method for controlling the critical injection quantity of regenerated HC as described in any one of claims 1 to 4 when it is run.

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