Control method and device for dmf regeneration, electronic equipment and storage medium

Abstract

The application provides a DPF regeneration control method and device, electronic equipment and storage medium, relates to the engine technical field, and the DPF regeneration control method comprises: acquiring a vehicle working condition; acquiring a particulate matter trap front temperature; acquiring a particulate matter oxidation catalyst front temperature; judging whether the particulate matter trap front temperature and the particulate matter oxidation catalyst front temperature reach a preset temperature condition; if the particulate matter trap front temperature and the particulate matter oxidation catalyst front temperature reach the preset temperature condition, judging whether the vehicle working condition reaches a preset working condition; if the vehicle working condition reaches the preset working condition, controlling the particulate matter trap to carry out specific regeneration. To some extent, the safety of the diesel particulate filter regeneration is improved, the failure rate of the diesel particulate filter burning is reduced, and the service life of the diesel particulate filter is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engines, in particular to a DPF regeneration control method and device, electronic equipment and storage medium. BACKGROUND

[0002] The DPF, diesel particulate filter, can effectively reduce the emission of particulate matter, and can first capture the particulate matter in the exhaust gas, and then oxidize the captured particulate matter to regenerate the particulate filter. However, in the prior art, there may be an abnormal increase in the content of carbon and hydrogen in the original exhaust due to deterioration of diesel engine combustion, and the carbon and hydrogen with an abnormal increase in content will be oxidized after flowing through the particulate oxidation catalyst, thereby releasing a large amount of heat, which may cause an abnormal increase in temperature before the diesel particulate filter, greatly increasing the probability of burning through the diesel particulate filter.

[0003] Therefore, there is an urgent need for a DPF regeneration control method and device, electronic equipment and storage medium to solve the technical problem of burning through the diesel particulate filter caused by an abnormal increase in the content of carbon and hydrogen in the original exhaust. SUMMARY

[0004] The present application provides a DPF regeneration control method and device, electronic equipment and storage medium to at least solve the technical problem of burning through the diesel particulate filter caused by an abnormal increase in the content of carbon and hydrogen in the original exhaust in the related art.

[0005] According to one aspect of an embodiment of the present application, a DPF regeneration control method is provided, comprising: obtaining a vehicle operating condition; obtaining a particulate filter front temperature; obtaining a particulate oxidation catalyst front temperature; determining whether the particulate filter front temperature and the particulate oxidation catalyst front temperature meet a preset temperature condition; if the particulate filter front temperature and the particulate oxidation catalyst front temperature meet the preset temperature condition, determining whether the vehicle operating condition meets a preset operating condition; and if the vehicle operating condition meets the preset operating condition, controlling the particulate filter to perform specific regeneration.

[0006] As an optional implementation, if the vehicle operating condition meets the preset operating condition, the control of the particulate filter to perform specific regeneration includes: controlling the duration of the heating second stage to be extended to a heating preset duration, so as to extend the oxidation time of carbon and hydrogen.

[0007] As an optional implementation, if the temperature difference between the particulate filter front temperature and the particulate oxidation catalyst front temperature is greater than a temperature difference preset value, the control of the particulate filter to perform specific regeneration further includes: reducing the starting temperature and the ending temperature of the regeneration oil injection stage to a preset temperature range; and extending the duration of the regeneration oil injection stage to an oil injection preset duration.

[0008] As an optional implementation, the preset temperature condition comprises: a temperature difference between the temperature before the particulate filter and the temperature before the particulate oxidation catalyst is greater than or equal to a preset temperature difference, and a duration of the temperature difference being greater than or equal to the preset temperature difference reaches a preset duration of temperature difference.

[0009] As an optional implementation, the vehicle working condition comprises: an accelerator opening degree, an ambient temperature and a vehicle speed; and the preset temperature condition further comprises: determining a preset temperature difference according to the ambient temperature and the vehicle speed.

[0010] As an optional implementation, the preset working condition comprises: the accelerator opening degree reaches a preset accelerator opening degree value, and a duration of the accelerator opening degree reaching the preset accelerator opening degree value reaches a preset duration of accelerator.

[0011] As an optional implementation, the method further comprises: if the vehicle working condition does not reach the preset working condition, controlling the particulate filter to perform standard regeneration.

[0012] According to another aspect of the embodiments of the present application, a DPF regeneration control device is further provided, comprising: a working condition acquisition module, configured to acquire a vehicle working condition; a temperature before a particulate filter acquisition module, configured to acquire a temperature before a particulate filter; a temperature before a particulate oxidation catalyst acquisition module, configured to acquire a temperature before a particulate oxidation catalyst; a temperature condition judgment module, configured to judge whether the temperature before the particulate filter and the temperature before the particulate oxidation catalyst reach a preset temperature condition; a working condition judgment module, configured to judge whether the vehicle working condition reaches a preset working condition if the temperature before the particulate filter and the temperature before the particulate oxidation catalyst reach the preset temperature condition; and a specific regeneration control module, configured to control the particulate filter to perform specific regeneration if the vehicle working condition reaches the preset working condition.

[0013] According to still another aspect of the embodiments of the present application, an electronic device is provided, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete communication with each other through the communication bus, the memory is configured to store a computer program, and the processor is configured to execute the control method steps of the DPF regeneration by running the computer program stored in the memory.

[0014] According to yet another aspect of the embodiments of the present application, a computer readable storage medium is provided, and the storage medium stores a computer program, wherein the computer program is set to execute the control method steps of the DPF regeneration when running.

[0015] In the embodiment of the present application, the control method for DPF regeneration is provided, comprising: obtaining vehicle working condition; obtaining particulate trap front temperature; obtaining particulate oxidation catalyst front temperature; judging whether the particulate trap front temperature and the particulate oxidation catalyst front temperature meet preset temperature condition; if the particulate trap front temperature and the particulate oxidation catalyst front temperature meet preset temperature condition, judging whether the vehicle working condition meets preset working condition; if the vehicle working condition meets preset working condition, controlling the particulate trap to perform specific regeneration. This method can identify the abnormal increase of carbon and hydrogen in the original exhaust, that is, when the particulate trap front temperature and the particulate oxidation catalyst front temperature meet the preset temperature condition, it is considered that the carbon and hydrogen in the original exhaust abnormally increase, and the specific regeneration of the diesel particulate trap is started after identifying the abnormal increase of carbon and hydrogen in the original exhaust, so as to avoid the situation that the diesel particulate trap is burned out due to the abnormal increase of carbon and hydrogen in the original exhaust, improve the safety of diesel particulate trap regeneration to a certain extent, reduce the failure rate of diesel particulate trap burning, and prolong the service life of diesel particulate trap. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without creative labor.

[0018] Figure 1 is a flow chart of an optional control method for DPF regeneration according to the embodiment of the present application;

[0019] Figure 2 is a schematic diagram of a control device for DPF regeneration according to the embodiment of the present application;

[0020] Figure 3 is a structural block diagram of an optional electronic device according to the embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to enable personnel in the technical field to better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should fall within the scope of protection of the present application.

[0022] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0023] In actual application, in the prior art, there can be a case of abnormal increase of hydrocarbon content in the original exhaust due to deterioration of diesel engine body combustion, and the hydrocarbon with abnormal increase of content is oxidized after flowing through the particulate matter oxidation catalyst, thereby releasing a large amount of heat, which can cause abnormal increase of temperature before the diesel particulate filter, greatly increasing the probability of burning through the diesel particulate filter.

[0024] Therefore, as Figure 1 indicated, the embodiments of the present application provide a control method for DPF regeneration, comprising:

[0025] S101 acquiring vehicle working conditions;

[0026] S102 acquiring temperature before the particulate filter;

[0027] S103 acquiring temperature before the particulate matter oxidation catalyst;

[0028] S104 judging whether the temperature before the particulate filter and the temperature before the particulate matter oxidation catalyst meet preset temperature conditions;

[0029] S105 if the temperature before the particulate filter and the temperature before the particulate matter oxidation catalyst meet the preset temperature conditions, judging whether the vehicle working conditions meet preset working conditions;

[0030] S106 if the vehicle working conditions meet the preset working conditions, controlling the particulate filter to perform specific regeneration.

[0031] Specifically, the method can identify the abnormal increase of carbon and hydrogen in the original exhaust, that is, when the temperature before the particulate filter and the temperature before the particulate oxidation catalyst meet the preset temperature condition, it is considered that the carbon and hydrogen in the original exhaust are abnormally increased, and the specific regeneration of the diesel particulate filter is started after identifying the abnormal increase of carbon and hydrogen in the original exhaust, so as to avoid the situation that the diesel particulate filter is burned out due to the abnormal increase of carbon and hydrogen in the original exhaust, improve the safety of the diesel particulate filter regeneration, reduce the failure rate of the diesel particulate filter burning out, and prolong the service life of the diesel particulate filter.

[0032] As an optional implementation, the preset temperature condition includes that the temperature difference between the temperature before the particulate filter and the temperature before the particulate oxidation catalyst is greater than or equal to a preset temperature difference, and the duration that the temperature difference between the temperature before the particulate filter and the temperature before the particulate oxidation catalyst is greater than or equal to the preset temperature difference reaches a preset temperature difference duration.

[0033] Specifically, when the temperature difference between the temperature before the particulate filter and the temperature before the particulate oxidation catalyst is greater than the preset temperature difference, and the duration that the temperature difference between the temperature before the particulate filter and the temperature before the particulate oxidation catalyst is greater than the preset temperature difference reaches the preset temperature difference duration, it is considered that the carbon and hydrogen content in the original exhaust is abnormally increased. When the engine is in a non-regeneration state, the temperature before the diesel particulate filter will be lower than the temperature before the diesel particulate oxidation catalyst due to the heat loss of the airflow. If there is a large amount of carbon and hydrogen in the original exhaust of the engine, the part of the carbon and hydrogen flowing through the diesel particulate oxidation catalyst will be oxidized and release a large amount of heat, causing the temperature before the diesel particulate filter to rise, and then the temperature difference between the temperature before the diesel particulate filter and the temperature before the diesel particulate oxidation catalyst becomes smaller or even positive.

[0034] As an optional implementation, the vehicle working condition includes: throttle opening, ambient temperature and vehicle speed; and the preset temperature condition further includes: determining the preset temperature difference according to the ambient temperature and the vehicle speed.

[0035] It should be noted that the present application does not further limit the preset temperature difference, and the preset temperature difference is greatly affected by the ambient temperature and the vehicle speed, wherein the higher the vehicle speed and the lower the ambient temperature, the larger the preset temperature difference, and the lower the vehicle speed and the higher the ambient temperature, the smaller the preset temperature difference.

[0036] As an optional implementation, the preset working condition includes: the throttle opening reaches a preset throttle opening value, and the duration that the throttle opening reaches the preset throttle opening value reaches a preset throttle duration.

[0037] Specifically, when the accelerator opening degree reaches the accelerator opening degree preset value and the accelerator opening degree reaches the accelerator opening degree preset value for an accelerator opening degree duration that reaches the accelerator preset duration, it is considered that the diesel particulate filter can be controlled to perform specific regeneration. It should be noted that the accelerator opening degree preset value is not limited in the present application, and can be selected according to the vehicle working condition.

[0038] As an optional implementation, if the vehicle working condition reaches the preset working condition, the control of the particulate filter to perform specific regeneration includes: controlling the duration of the heating second stage to be extended to a heating preset duration, so as to extend the hydrocarbon oxidation time.

[0039] Specifically, the specific regeneration includes controlling the duration of the heating second stage to be extended to a heating preset duration, by extending the duration of the heating second stage, the preheating duration of the diesel particulate filter is extended, and the hydrocarbon oxidation time is also extended, and the accumulated hydrocarbon in the diesel particulate filter and the diesel particulate oxidation catalyst is removed by high-temperature exhaust gas, which effectively avoids the temperature runaway in front of the diesel particulate filter during the regeneration oil injection stage, and further avoids the burning of the diesel particulate filter, improves the safety of the diesel particulate filter regeneration, and reduces the failure rate of the diesel particulate filter burning.

[0040] As an optional implementation, if the vehicle working condition reaches the preset working condition, the control of the particulate filter to perform specific regeneration also includes: reducing the starting temperature and the ending temperature of the regeneration oil injection stage to a preset temperature range; and extending the duration of the regeneration oil injection stage to an oil injection preset duration.

[0041] Specifically, the increase of hydrocarbon in the original exhaust is usually accompanied by the increase of Soot in the original exhaust; in this case, the error of the model calculation will increase. The actual carbon load at the time of diesel particulate filter regeneration may be much higher than the model value. In order to ensure the safety of diesel particulate filter regeneration, the preset temperature is 600°C during standard regeneration, and therefore the specific regeneration can control the temperature of the diesel particulate filter during regeneration to be between 400°C and 500°C, and can also extend the regeneration time to 2h, so as to control the diesel particulate filter regeneration to be mainly passive regeneration. Further improve the safety of diesel particulate filter regeneration, and reduce the failure rate of diesel particulate filter burning.

[0042] As an optional implementation, it also includes: if the vehicle working condition does not reach the preset working condition, controlling the particulate filter to perform standard regeneration.

[0043] According to another aspect of the embodiments of the present application, a DPF regeneration control device is also provided. Figure 2 is a schematic diagram of a DPF regeneration control device according to an embodiment of the present application, like Figure 2As shown, the device can include:

[0044] The working condition acquisition module 201 is configured to acquire the vehicle working condition.

[0045] The particulate matter trap front temperature acquisition module 202 is configured to acquire the particulate matter trap front temperature.

[0046] The particulate matter oxidation catalyst front temperature acquisition module 203 is configured to acquire the particulate matter oxidation catalyst front temperature.

[0047] The temperature condition judgment module 204 is configured to judge whether the particulate matter trap front temperature and the particulate matter oxidation catalyst front temperature reach a preset temperature condition.

[0048] The working condition judgment module 205 is configured to judge whether the vehicle working condition reaches a preset working condition if the particulate matter trap front temperature and the particulate matter oxidation catalyst front temperature reach the preset temperature condition.

[0049] The specificity regeneration control module 206 is configured to control the particulate matter trap to perform specificity regeneration if the vehicle working condition reaches the preset working condition.

[0050] Figure 3 is a structural block diagram of an optional electronic device according to an embodiment of the present application, as shown in Figure 3 includes a processor 302, a communication interface 304, a memory 306 and a communication bus 308, wherein the processor 302, the communication interface 304 and the memory 306 complete mutual communication through the communication bus 308, wherein,

[0051] The memory 306 is configured to store a computer program.

[0052] The processor 302 is configured to implement the following steps when executing the computer program stored in the memory 306:

[0053] Acquire the vehicle working condition.

[0054] Acquire the particulate matter trap front temperature.

[0055] Acquire the particulate matter oxidation catalyst front temperature.

[0056] Judge whether the particulate matter trap front temperature and the particulate matter oxidation catalyst front temperature reach a preset temperature condition.

[0057] Judge whether the vehicle working condition reaches a preset working condition if the particulate matter trap front temperature and the particulate matter oxidation catalyst front temperature reach the preset temperature condition.

[0058] Control the particulate matter trap to perform specificity regeneration if the vehicle working condition reaches the preset working condition.

[0059] According to still another aspect of the embodiments of the present application, an electronic device for a control method of DPF regeneration is provided. The electronic device can be a server, a terminal, or a combination thereof.

[0060] Optionally, in the embodiment, the communication bus can be a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry Standard Architecture) bus, or the like. The communication bus can be divided into an address bus, a data bus, a control bus, or the like. For the convenience of representation, Figure 3 In the figure, only one thick line is used to represent the bus, but it does not mean that there is only one bus or only one type of bus.

[0061] The communication interface is used for communication between the electronic device and other devices.

[0062] The memory can include a RAM and can also include a non-volatile memory, for example, at least one disk memory. Optionally, the memory can also be at least one storage device located away from the aforementioned processor.

[0063] Other module units in the control device of DPF regeneration can also be included, but are not limited to the above, and will not be described herein.

[0064] According to still another aspect of the embodiments of the present application, a storage medium is provided. Optionally, in the embodiment, the storage medium can be used to execute program codes of the control method of DPF regeneration.

[0065] Optionally, in the embodiment, the storage medium can be located on at least one of the plurality of network devices in the network shown in the above embodiment.

[0066] Optionally, in the embodiment, the storage medium is configured to store program codes for executing the following steps:

[0067] Obtaining a vehicle operating condition;

[0068] Obtaining a temperature before the particulate filter;

[0069] Obtaining a temperature before the particulate oxidation catalyst;

[0070] Determining whether the temperature before the particulate filter and the temperature before the particulate oxidation catalyst meet a preset temperature condition;

[0071] If the preset temperature condition is met, i.e., the particulate matter trap front temperature and the particulate matter oxidation catalyst front temperature reach the preset temperature condition, it is determined whether the vehicle working condition reaches the preset working condition.

[0072] If the vehicle working condition reaches the preset working condition, the particulate matter trap is controlled to perform specific regeneration.

[0073] The specific examples in the embodiments can refer to the examples described in the above embodiments, and the details are not repeated herein.

[0074] Optionally, in the embodiments, the storage medium can include, but is not limited to, a U disk, a ROM, a RAM, a mobile hard disk, a magnetic disk or an optical disk, and various storage program code storage media.

[0075] The serial numbers of the embodiments of the present application are only for description, and do not represent the advantages or disadvantages of the embodiments.

[0076] The integrated units in the above embodiments, if realized in the form of software function units and sold or used as independent products, can be stored in the above computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that make contributions to the prior art or the whole or part of the technical solutions can be embodied in the form of software products. The computer software product is stored in the storage medium and includes a plurality of instructions for causing one or more electronic devices (which can be personal computers, servers or network devices, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application.

[0077] In the above embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0078] In the several embodiments provided by the present application, it should be understood that the disclosed client can be implemented in other ways. Of course, the above device embodiment is only schematic. For example, the division of the units is only a logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, units or modules, and can be electrical or other forms.

[0079] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place or distributed on multiple network units. Part or all of the units can be selected to achieve the purpose of the scheme provided in the embodiment according to actual needs.

[0080] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0081] In the above embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can refer to the relevant description of other embodiments.

[0082] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A control method for DPF regeneration, characterized in that, include: Obtain vehicle operating conditions; Obtain the temperature before the particulate matter trap; Obtain the temperature before the particulate matter oxidation catalyst; Determine whether the temperature before the particulate matter collector and the temperature before the particulate matter oxidation catalyst have reached the preset temperature conditions. If the temperature before the particulate matter collector and the temperature before the particulate matter oxidation catalyst reach the preset temperature conditions, determine whether the vehicle operating condition has reached the preset operating condition. If the vehicle's operating conditions reach the preset operating conditions, the particulate matter collector is controlled to undergo specific regeneration. If the vehicle's operating condition reaches a preset operating condition, controlling the particulate matter collector to perform specific regeneration includes: The duration of the second heating stage is extended to the preset heating duration in order to prolong the oxidation time of hydrocarbons; The preset temperature conditions include: The temperature difference between the particulate matter collector and the particulate matter oxidation catalyst is greater than or equal to a preset temperature difference, and the duration for which the temperature difference between the particulate matter collector and the particulate matter oxidation catalyst is greater than or equal to the preset temperature difference reaches the preset temperature difference duration.

2. The control method for DPF regeneration as described in claim 1, characterized in that, If the vehicle operating condition reaches a preset operating condition, controlling the particulate matter collector to perform specific regeneration further includes: Reduce the start and end temperatures of the regeneration injection stage to the preset temperature range; Extend the duration of the regeneration injection phase to the preset injection duration.

3. The control method for DPF regeneration as described in claim 1, characterized in that, The vehicle operating conditions include: throttle opening, ambient temperature, and vehicle speed; the preset temperature conditions also include: determining a preset temperature difference based on the ambient temperature and the vehicle speed.

4. The control method for DPF regeneration as described in claim 3, characterized in that, The preset operating conditions include: The throttle opening reaches a preset throttle opening value, and the throttle duration for which the throttle opening reaches the preset throttle opening value reaches a preset throttle duration.

5. The control method for DPF regeneration as described in claim 1, characterized in that, Also includes: If the vehicle's operating conditions do not meet the preset operating conditions, the particulate matter collector is controlled to perform standard regeneration.

6. A control device for DPF regeneration, characterized in that, include: The operating condition acquisition module is used to acquire vehicle operating conditions; A particulate matter trap inlet temperature acquisition module is used to acquire the particulate matter trap inlet temperature. A particulate matter oxidation catalyst inlet temperature acquisition module is used to acquire the particulate matter oxidation catalyst inlet temperature; The temperature condition judgment module is used to determine whether the temperature before the particulate matter collector and the temperature before the particulate matter oxidation catalyst have reached the preset temperature conditions. The operating condition judgment module is used to determine whether the vehicle operating condition has reached the preset operating condition if the temperature before the particulate matter collector and the temperature before the particulate matter oxidation catalyst reach the preset temperature conditions. A specific regeneration control module is used to control the particulate matter collector to perform specific regeneration if the vehicle's operating conditions reach a preset condition. If the vehicle operating condition reaches the preset operating condition, controlling the particulate matter collector to perform specific regeneration includes: controlling the duration of the second heating stage to be extended to the preset heating duration, so as to prolong the oxidation time of hydrocarbons. The preset temperature conditions include: the temperature difference between the particulate matter trap and the particulate matter oxidation catalyst is greater than or equal to a preset temperature difference, and the duration for which the temperature difference between the particulate matter trap and the particulate matter oxidation catalyst is greater than or equal to the preset temperature difference reaches a preset temperature difference duration.

7. 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 control method steps for DPF regeneration according to any one of claims 1 to 5 by running the computer program stored in the memory.

8. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, wherein the computer program is configured to execute the control method steps for DPF regeneration as described in any one of claims 1 to 5 when running.

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