Dpf regeneration control method and device

Abstract

The application provides a DPF regeneration control method and device, wherein when it is detected that the DPF meets a preset regeneration condition, the flow resistance of a particulate matter trap (DPF) can be obtained; according to the flow resistance and a pre-calculated carbon deposition distribution uniformity coefficient, the light-off temperature peak of the DPF is determined; according to the carbon deposition distribution uniformity coefficient and a preset light-off rate calibration initial value, the light-off rate of the DPF is determined; and according to the light-off rate and the light-off temperature peak, the DPF is subjected to regeneration control. By applying the method provided by the application, the light-off temperature peak and the light-off rate can be determined through the carbon deposition distribution uniformity coefficient, and then the DPF is subjected to regeneration control according to the light-off temperature peak and the light-off rate, so that the carbon deposition area distribution of the DPF can be fully considered, and the reliability of the regeneration process of the DPF is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of diesel engine regeneration, in particular to a DPF regeneration control method and device. BACKGROUND

[0002] A diesel particulate filter (DPF) is a filter installed in the exhaust system of a diesel engine, which can capture particulate emissions before they enter the atmosphere, such as diffusion deposition, inertial deposition, or linear interception, and can reduce particulate emissions in diesel exhaust pollutants. It is one of the most effective and direct methods for purifying diesel particulate matter.

[0003] During the operation of the trap, particulate matter will accumulate in the filter. When it reaches a certain value, it will cause the performance of the diesel engine to begin to deteriorate, so the deposited particles must be removed in time to restore the particulate filter to its original working state, and the particulate matter must be removed to ensure that the DPF continues to work normally, i.e. DPF regeneration. In the prior art, the regeneration control of the DPF is usually realized by the total amount of carbon deposition in the DPF and other working conditions.

[0004] However, during the actual operation of the vehicle, the amount of carbon deposition in the DPF gradually increases. Due to the influence of the flow field entering the DPF on the distribution of the carbon deposition inside the DPF, the carbon deposition inside the DPF is usually unevenly distributed. Using the existing method for regeneration control will cause local high temperature during the regeneration process, which will seriously damage the carrier. Uneven distribution of carbon deposition will affect the differential pressure characteristics of the DPF. Even with the same amount of carbon deposition, the differential pressure will be different due to different carbon deposition distribution areas. Using the existing method for regeneration control cannot accurately control the regeneration temperature, and the reliability of DPF regeneration is low. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a DPF regeneration control method that can improve the reliability of the DPF regeneration process.

[0006] The present application also provides a DPF regeneration control device to ensure the implementation and application of the above method in practice.

[0007] A DPF regeneration control method, comprising:

[0008] When it is detected that the particulate trap DPF meets the preset regeneration condition, the flow resistance of the DPF is obtained;

[0009] The flow resistance of the particulate trap DPF is obtained;

[0010] According to the flow resistance and the pre-calculated carbon deposition distribution uniformity coefficient, the light-off temperature peak of the DPF is determined.

[0011] determining the light-off rate of the DPF according to the carbon deposition distribution uniformity coefficient and a preset light-off rate calibration initial value;

[0012] when it is detected that the DPF meets a preset regeneration condition, performing regeneration control on the DPF according to the light-off rate and the light-off temperature peak value.

[0013] The method described above, optionally, the process of calculating the carbon deposition distribution uniformity coefficient comprises:

[0014] after the total carbon deposition mass of the DPF reaches a preset carbon deposition mass target value, determining the carbon deposition mass of each preset spatial region of the DPF; each spatial region has the same size;

[0015] calculating the carbon deposition distribution uniformity coefficient of the DPF according to the number of spatial regions of the DPF and the carbon deposition mass of each spatial region.

[0016] The method described above, optionally, the process of determining the light-off temperature peak value of the DPF according to the flow resistance and the carbon deposition distribution uniformity coefficient calculated in advance comprises:

[0017] determining the carbon load corresponding to the flow resistance in a preset first relationship curve; the first relationship curve comprises the corresponding relationship between the flow resistance and the carbon load;

[0018] querying a preset relationship table according to the carbon load and the carbon deposition distribution uniformity coefficient to obtain the light-off temperature peak value of the DPF.

[0019] The method described above, optionally, the process of determining the light-off rate of the DPF according to the carbon deposition distribution uniformity coefficient and a preset light-off rate calibration initial value comprises:

[0020] determining a light-off rate correction coefficient corresponding to the carbon deposition distribution uniformity coefficient in a preset second relationship curve; the second relationship curve comprises the corresponding relationship between the carbon deposition distribution uniformity coefficient and the light-off rate correction coefficient;

[0021] calculating the light-off rate of the DPF according to the light-off rate calibration initial value and the light-off rate correction coefficient.

[0022] The method described above, optionally, the process of detecting that the DPF meets a preset regeneration condition comprises:

[0023] obtaining a state parameter of the DPF;

[0024] detecting whether the state parameter is within a preset parameter threshold range;

[0025] If the state parameter is within a preset parameter threshold range, it is determined that the DPF satisfies a preset regeneration condition.

[0026] A DPF regeneration control device comprises:

[0027] An acquisition unit is configured to acquire a flow resistance of a particulate matter filter (DPF) when it is detected that the DPF satisfies a preset regeneration condition.

[0028] A first determination unit is configured to determine a light-off temperature peak of the DPF according to the flow resistance and a pre-calculated carbon deposition distribution uniformity coefficient.

[0029] A second determination unit is configured to determine a light-off rate of the DPF according to the carbon deposition distribution uniformity coefficient and a preset light-off rate calibration initial value.

[0030] A control unit is configured to perform a regeneration control on the DPF according to the light-off rate and the light-off temperature peak when it is detected that the DPF satisfies a preset regeneration condition.

[0031] The device described above, optionally, the first determination unit comprises:

[0032] A first determination sub-unit is configured to determine a carbon deposition mass of each preset spatial region of the DPF after a total carbon deposition mass of the DPF reaches a preset carbon deposition mass target value; each spatial region has the same size.

[0033] A first calculation sub-unit is configured to calculate the carbon deposition distribution uniformity coefficient of the DPF according to the number of spatial regions of the DPF and the carbon deposition mass of each spatial region.

[0034] The device described above, optionally, the first determination unit comprises:

[0035] A second determination sub-unit is configured to determine a carbon load corresponding to the flow resistance in a preset first relationship curve; the first relationship curve comprises a corresponding relationship between the flow resistance and the carbon load.

[0036] An execution sub-unit is configured to query a preset relationship table according to the carbon load and the carbon deposition distribution uniformity coefficient to obtain the light-off temperature peak of the DPF.

[0037] The device described above, optionally, the second determination unit comprises:

[0038] A third determination sub-unit is configured to determine a light-off rate correction coefficient corresponding to the carbon deposition distribution uniformity coefficient in a preset second relationship curve; the second relationship curve comprises a corresponding relationship between the carbon deposition distribution uniformity coefficient and the light-off rate correction coefficient.

[0039] The second calculation sub-unit is configured to calculate the light-off rate of the DPF according to the light-off rate calibration initial value and the light-off rate correction coefficient.

[0040] The device described above, optionally, the control unit comprises:

[0041] The acquisition sub-unit is configured to acquire a state parameter of the DPF.

[0042] The detection sub-unit is configured to detect whether the state parameter is within a preset parameter threshold range.

[0043] The determination sub-unit is configured to determine that the DPF satisfies a preset regeneration condition if the state parameter is within the preset parameter threshold range.

[0044] Compared with the prior art, the present application has the following advantages:

[0045] The present application provides a DPF regeneration control method and device, wherein, when it is detected that the DPF satisfies a preset regeneration condition, the flow resistance of the particulate matter trap (DPF) can be acquired; the light-off temperature peak of the DPF is determined according to the flow resistance and the pre-calculated carbon deposition distribution uniformity coefficient; the light-off rate of the DPF is determined according to the carbon deposition distribution uniformity coefficient and a preset light-off rate calibration initial value; and the DPF is controlled for regeneration according to the light-off rate and the light-off temperature peak. By applying the method provided by the present application, the light-off temperature peak and the light-off rate can be determined through the carbon deposition distribution uniformity coefficient, and then the DPF is controlled for regeneration according to the light-off temperature peak and the light-off rate, so that the carbon deposition area distribution of the DPF can be fully considered, and the reliability of the regeneration process of the DPF is improved. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0047] Figure 1 A method flowchart of a DPF regeneration control method provided by the present application;

[0048] Figure 2 A flowchart of a process of calculating a carbon deposition distribution uniformity coefficient provided by the present application;

[0049] Figure 3 A structural schematic diagram of a carbon deposition capturing device provided by the present application;

[0050] Figure 4 A flowchart for calculating the carbon deposition distribution uniformity coefficient provided by the present application is shown in the figure;

[0051] Figure 5 A structure diagram of a DPF carrier provided by the present application is shown in the figure;

[0052] Figure 6 A carbon deposition distribution diagram of a DPF channel provided by the present application is shown in the figure;

[0053] Figure 7 A flowchart for calculating the light-off temperature peak and light-off rate provided by the present application is shown in the figure;

[0054] Figure 8 A structure diagram of a DPF regeneration control device provided by the present application is shown in the figure. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0056] In the present application, the terms “comprise”, “contain” or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the sentence “comprises a…” does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0057] The embodiments of the present application provide a DPF regeneration control method, which can be applied in a controller, for example, an ECU controller, and a method flowchart of the method is shown in Figure 1 The specific steps include:

[0058] S101: When it is detected that the particulate matter trap DPF meets the preset regeneration condition, the flow resistance of the DPF is acquired.

[0059] In the present embodiment, the state parameters of the DPF can be acquired, and whether the DPF meets the regeneration condition is detected according to the state parameters. In the case where the DPF meets the regeneration condition, the flow resistance of the DPF can be acquired.

[0060] S102: determining the light-off temperature peak of the DPF according to the flow resistance and the pre-calculated soot distribution uniformity coefficient.

[0061] In the embodiment, the soot load of the DPF can be determined by the flow resistance of the DPF, and then the light-off temperature peak can be determined according to the soot distribution uniformity coefficient and the soot load. The light-off temperature peak refers to the upper limit value of the temperature in the light-off process of the diesel oxidation catalyst (DOC).

[0062] S103: determining the light-off rate of the DPF according to the soot distribution uniformity coefficient and the preset light-off rate calibration initial value.

[0063] In the embodiment, the light-off rate correction coefficient corresponding to the soot distribution uniformity coefficient can be determined, and the light-off rate of the DPF, i.e. the temperature rising rate in the light-off process of the DOC, can be determined according to the light-off rate calibration initial value and the light-off rate correction coefficient.

[0064] S104: performing the regeneration control on the DPF according to the light-off rate and the light-off temperature peak.

[0065] In the embodiment, the fuel injection of the DOC connected with the PDF can be controlled according to the light-off rate and the light-off temperature peak, so as to perform the regeneration control on the DPF.

[0066] By using the method provided by the application, the light-off temperature peak and the light-off rate can be determined according to the soot distribution uniformity coefficient, and then the regeneration control can be performed on the DPF according to the light-off temperature peak and the light-off rate. The soot area distribution of the DPF can be fully considered, and the reliability of the regeneration process of the DPF is improved.

[0067] In the embodiments provided by the application, based on the above-described implementation process, optionally, the process of calculating the soot distribution uniformity coefficient includes the following steps, as shown in Figure 2

[0068] S201: determining the soot mass of each preset spatial region of the DPF after the total soot mass of the DPF reaches a preset soot mass target value; the size of each spatial region is the same.

[0069] In the embodiment, the total soot mass of the DPF can be determined by weighing, and the soot mass of each spatial region of the DPF can be determined after the total soot mass of the DPF reaches the preset soot mass target value.

[0070] In some embodiments, the soot mass of each preset spatial region of the DPF can be determined by a soot trapping device, wherein the soot trapping device includes a plurality of spatial regions, and each spatial region is connected with a soot mass sensor. Figure 3 ​As shown, a structure schematic diagram of a carbon deposition capturing device provided in an embodiment of the present application is shown, the carbon deposition capturing device is provided with a plurality of storage compartments, the DPF carbon deposition capturing device is placed on the front end surface of the DPF carrier and closely connected, high pressure air is blown from the rear end surface of the DPF carrier, and the carbon deposition enters each storage compartment of the carbon deposition capturing device, wherein the carbon deposition mass in each square storage compartment is determined as the carbon deposition mass of the space region of the DPF corresponding to the storage compartment.

[0071] S202: According to the number of space regions of the DPF and the carbon deposition mass of each space region, the carbon deposition distribution uniformity coefficient of the DPF is calculated.

[0072] In the embodiment, the way of calculating the carbon deposition distribution uniformity coefficient of the DPF according to the number of each space region of the DPF and the carbon deposition mass of each space region is as follows:

[0073]

[0074] Wherein, UI is the carbon deposition distribution uniformity coefficient, N is the number of each space region of the DPF, m i is the carbon deposition mass of the i-th square storage compartment unit of the capturing device.

[0075] In the embodiment provided in the present application, based on the above implementation process, optionally, the light-off temperature peak of the DPF is determined according to the flow resistance and the pre-calculated carbon deposition distribution uniformity coefficient, and the method comprises the following steps:

[0076] The carbon load corresponding to the flow resistance is determined in the preset first relationship curve; the first relationship curve comprises the corresponding relationship between the flow resistance and the carbon load;

[0077] The light-off temperature peak of the DPF is obtained by querying a preset relationship table according to the carbon load and the carbon deposition distribution uniformity coefficient.

[0078] In the embodiment, the first relationship curve can be a flow resistance-carbon load relationship curve, and the corresponding carbon load is determined in the first relationship curve according to the obtained flow resistance. The light-off temperature peak of the DPF is obtained by querying a preset relationship table according to the carbon load and the carbon deposition distribution uniformity coefficient, wherein the relationship table records the corresponding relationship between each carbon load, each carbon deposition distribution uniformity coefficient and the light-off temperature peak.

[0079] In the embodiment provided in the present application, based on the above implementation process, optionally, the light-off temperature peak of the DPF is determined according to the flow resistance and the pre-calculated carbon deposition distribution uniformity coefficient, and the method comprises the following steps:

[0080] determine the ignition rate correction coefficient corresponding to the carbon deposition distribution uniformity coefficient in the preset second relationship curve; the second relationship curve comprises a corresponding relationship between the carbon deposition distribution uniformity coefficient and the ignition rate correction coefficient;

[0081] According to the ignition rate calibration initial value and the ignition rate correction coefficient, the ignition rate of the DPF is calculated.

[0082] In the embodiment, the second relationship curve can be a carbon deposition uniformity coefficient-regeneration ignition rate correction coefficient curve, the ignition rate correction coefficient corresponding to the carbon deposition uniformity coefficient of the DPF can be determined in the second relationship curve according to the carbon deposition uniformity coefficient of the DPF, and the ignition rate of the DPF is obtained by multiplying the ignition rate calibration initial value and the ignition rate correction coefficient.

[0083] In the embodiment provided by the application, based on the above-mentioned implementation process, optionally, the detection that the DPF meets the preset regeneration condition comprises:

[0084] obtaining a state parameter of the DPF;

[0085] detecting whether the state parameter is in a preset parameter threshold range;

[0086] if the state parameter is in the preset parameter threshold range, it is determined that the DPF meets the preset regeneration condition.

[0087] In the embodiment, the state parameter of the DPF can include any one or combination of the carbon deposition amount, the differential pressure sensor state, the exhaust gas volume flow, the engine speed, the fuel injection amount and the DPF average temperature, and different parameters correspond to different parameter threshold ranges.

[0088] Optionally, in the case that the state parameter is the carbon deposition amount, the parameter threshold range can be a carbon deposition amount threshold range, it can be determined whether the carbon deposition amount is in the preset carbon deposition amount threshold range, and if the carbon deposition amount is not in the carbon deposition amount threshold range, it is determined that the DPF does not meet the regeneration condition.

[0089] The DPF regeneration control method provided by the application can calculate the carbon deposition distribution uniformity coefficient of the DPF in the actual application process, as shown in Figure 4 A flowchart example for calculating the carbon deposition distribution uniformity coefficient provided by the embodiment of the application can determine the total carbon deposition mass of the DPF by weighing, as shown in Figure 5 A structure schematic diagram of a DPF carrier provided by the embodiment of the application, after the total carbon deposition mass of the DPF reaches a target setting value, high-pressure air is blown into the rear end of the DPF, as shown in Figure 6A DPF channel carbon deposition distribution schematic diagram provided by the embodiment of the present application is used to blow the carbon deposition in the DPF carrier into the carbon deposition capturing device, weigh and confirm the carbon deposition mass in each storage compartment in the carbon deposition capturing device that meets the preset screening condition, and calculate the carbon deposition distribution uniformity coefficient of the DPF according to the carbon deposition mass of each storage compartment that meets the preset screening condition.

[0090] After the carbon deposition distribution uniformity coefficient is calculated, the light-off temperature peak value and the light-off rate are determined according to the carbon deposition distribution uniformity coefficient, as shown in Figure 7 A process schematic diagram for calculating the light-off temperature peak value and the light-off rate provided by the embodiment of the present application is used to determine the carbon load of the DPF according to the flow resistance collected by the controller, determine the light-off temperature peak value according to the carbon deposition distribution uniformity coefficient and the carbon load, determine the light-off rate correction coefficient according to the carbon deposition distribution uniformity coefficient, and calculate the light-off rate according to the light-off rate correction coefficient and the preset light-off rate initial calibration value.

[0091] After the light-off temperature peak value and the light-off rate are determined, the oil amount of the diesel oil injected into the cylinder or the tailpipe of the engine is controlled according to the light-off temperature peak value and the light-off rate, so as to realize the safe and controllable active regeneration.

[0092] Compared with the related art Figure 1 Corresponding to the method, the embodiment of the present application further provides a DPF regeneration control device used for controlling the method. Figure 1 The DPF regeneration control device provided by the embodiment of the present application can be applied to the controller, and a structure schematic diagram thereof is shown in Figure 8 The DPF regeneration control device specifically includes:

[0093] The acquisition unit 801 is used to acquire the flow resistance of the particulate matter trap DPF when it is detected that the DPF meets the preset regeneration condition.

[0094] The first determination unit 802 is used to determine the light-off temperature peak value of the DPF according to the flow resistance and the carbon deposition distribution uniformity coefficient calculated in advance.

[0095] The second determination unit 803 is used to determine the light-off rate of the DPF according to the carbon deposition distribution uniformity coefficient and the preset light-off rate calibration initial value.

[0096] The control unit 804 is used to perform the regeneration control on the DPF according to the light-off rate and the light-off temperature peak value.

[0097] In the embodiment provided by the present application, based on the above scheme, optionally, the first determination unit 802 includes:

[0098] The first determining sub-unit is configured to determine the carbon deposition mass of each preset spatial region of the DPF after the total carbon deposition mass of the DPF reaches a preset carbon deposition mass target value; and the size of each spatial region is the same.

[0099] The first calculating sub-unit is configured to calculate the carbon deposition distribution uniformity coefficient of the DPF according to the number of spatial regions of the DPF and the carbon deposition mass of each spatial region.

[0100] In an embodiment provided by the present application, based on the above scheme, the first determining unit comprises:

[0101] The second determining sub-unit is configured to determine the carbon load corresponding to the flow resistance in a preset first relationship curve; the first relationship curve comprises the corresponding relationship between the flow resistance and the carbon load.

[0102] The executing sub-unit is configured to query a preset relationship table according to the carbon load and the carbon deposition distribution uniformity coefficient to obtain the light-off temperature peak value of the DPF.

[0103] In an embodiment provided by the present application, based on the above scheme, the second determining unit comprises:

[0104] The third determining sub-unit is configured to determine the light-off rate correction coefficient corresponding to the carbon deposition distribution uniformity coefficient in a preset second relationship curve; the second relationship curve comprises the corresponding relationship between the carbon deposition distribution uniformity coefficient and the light-off rate correction coefficient.

[0105] The second calculating sub-unit is configured to calculate the light-off rate of the DPF according to the light-off rate initial value and the light-off rate correction coefficient.

[0106] In an embodiment provided by the present application, based on the above scheme, the control unit comprises:

[0107] The acquiring sub-unit is configured to acquire the state parameter of the DPF.

[0108] The detecting sub-unit is configured to detect whether the state parameter is within a preset parameter threshold range.

[0109] The determining sub-unit is configured to determine that the DPF satisfies a preset regeneration condition if the state parameter is not within the preset parameter threshold range.

[0110] The specific principles and execution processes of each unit and module in the DPF regeneration control device disclosed in the embodiments of the present application are the same as those of the DPF regeneration control method disclosed in the embodiments of the present application, and can be referred to the corresponding parts of the DPF regeneration control method provided by the embodiments of the present application, which will not be described here.

[0111] It should be noted that each of the embodiments in the specification is described in progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between embodiments can be mutually referred to. For the device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiments.

[0112] Finally, it should be noted that in this document, the relationship terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0113] For the convenience of description, the above device is described as various units in function respectively. Of course, the functions of the units can be realized in the same or multiple software and / or hardware when implementing the present application.

[0114] From the above description of the embodiments, those skilled in the art can clearly understand that the present application can be realized by means of software and necessary general hardware platform. Based on such understanding, the technical solutions of the present application or the part that contributes to the prior art can be embodied in the form of software product, which can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including a plurality of instructions to make a computer device (which can be a personal computer, server, or network device, etc.) execute the method described in each embodiment or some part of the embodiment of the present application.

[0115] The above has introduced in detail the DPF regeneration control method provided by the present application, and the principle and implementation manner of the present application have been described by applying specific examples in this document, and the above embodiment description is only for helping to understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed, and according to the above, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A DPF regeneration control method characterized by, The method comprises the following steps: When it is detected that the particulate matter trap (DPF) meets a preset regeneration condition, the flow resistance of the DPF is acquired; According to the flow resistance and a pre-calculated carbon deposition distribution uniformity coefficient, the light-off temperature peak of the DPF is determined; According to the carbon deposition distribution uniformity coefficient and a preset light-off rate calibration initial value, the light-off rate of the DPF is determined; According to the light-off rate and the light-off temperature peak, the DPF is subjected to regeneration control; The process of calculating the carbon deposition distribution uniformity coefficient comprises the following steps: after the total carbon deposition mass of the DPF reaches a preset carbon deposition mass target value, the carbon deposition mass of each preset spatial region of the DPF is determined; the size of each spatial region is the same; according to the number of spatial regions of the DPF and the carbon deposition mass of each spatial region, the carbon deposition distribution uniformity coefficient of the DPF is calculated; The determination of the light-off temperature peak of the DPF according to the flow resistance and the pre-calculated carbon deposition distribution uniformity coefficient comprises the following steps: in a preset first relationship curve, the carbon load corresponding to the flow resistance is determined; the first relationship curve comprises the corresponding relationship between the flow resistance and the carbon load; according to the carbon load and the carbon deposition distribution uniformity coefficient, a relationship table is queried to obtain the light-off temperature peak of the DPF; The determination of the light-off rate of the DPF according to the carbon deposition distribution uniformity coefficient and the preset light-off rate calibration initial value comprises the following steps: in a preset second relationship curve, the light-off rate correction coefficient corresponding to the carbon deposition distribution uniformity coefficient is determined; the second relationship curve comprises the corresponding relationship between the carbon deposition distribution uniformity coefficient and the light-off rate correction coefficient; according to the light-off rate calibration initial value and the light-off rate correction coefficient, the light-off rate of the DPF is calculated.

2. The method of claim 1, wherein, The detection that the DPF meets the preset regeneration condition comprises the following steps: An acquisition unit is configured to acquire the flow resistance of the DPF when it is detected that the particulate matter trap (DPF) meets a preset regeneration condition; A first determination unit is configured to determine the light-off temperature peak of the DPF according to the flow resistance and a pre-calculated carbon deposition distribution uniformity coefficient; A second determination unit is configured to determine the light-off rate of the DPF according to the carbon deposition distribution uniformity coefficient and a preset light-off rate calibration initial value; 3. A DPF regeneration control device characterized by comprising: A control unit is configured to control the regeneration of the DPF according to the light-off rate and the light-off temperature peak; The first determination unit comprises: A first determination subunit is configured to determine the carbon deposition mass of each preset spatial region of the DPF after the total carbon deposition mass of the DPF reaches a preset carbon deposition mass target value; the size of each spatial region is the same; A first calculation subunit is configured to calculate the carbon deposition distribution uniformity coefficient of the DPF according to the number of spatial regions of the DPF and the carbon deposition mass of each spatial region. ​ ​ ​ ​ The second determining sub-unit is configured to determine the carbon loading corresponding to the flow resistance in a preset first relationship curve; the first relationship curve includes a corresponding relationship between the flow resistance and the carbon loading; The executing sub-unit is configured to query a preset relationship table according to the carbon loading and the carbon deposition distribution uniformity coefficient to obtain the light-off temperature peak of the DPF; The second determining unit comprises: The third determining sub-unit is configured to determine the light-off rate correction coefficient corresponding to the carbon deposition distribution uniformity coefficient in a preset second relationship curve; the second relationship curve includes a corresponding relationship between the carbon deposition distribution uniformity coefficient and the light-off rate correction coefficient; The second calculating sub-unit is configured to calculate the light-off rate of the DPF according to the light-off rate initial value and the light-off rate correction coefficient.

4. The apparatus of claim 3, wherein, The control unit comprises: The acquiring sub-unit is configured to acquire a state parameter of the DPF; The detecting sub-unit is configured to detect whether the state parameter is within a preset parameter threshold range; The determining sub-unit is configured to determine that the DPF satisfies a preset regeneration condition if the state parameter is within the preset parameter threshold range.

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