CN114251163B - DPF regeneration control method and device, storage medium and vehicle-mounted computer - Google Patents

DPF regeneration control method and device, storage medium and vehicle-mounted computer Download PDF

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CN114251163B
CN114251163B CN202111396005.7A CN202111396005A CN114251163B CN 114251163 B CN114251163 B CN 114251163B CN 202111396005 A CN202111396005 A CN 202111396005A CN 114251163 B CN114251163 B CN 114251163B
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dpf
regeneration
temperature value
urea
current
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CN114251163A (en
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贾秀民
陈月春
李素婷
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806—Properties of reducing agent or dosing system
    • F01N2900/1811—Temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

The invention discloses a DPF regeneration control method, a DPF regeneration control device, a storage medium and a vehicle-mounted computer, wherein the method comprises the following steps: when the actual carbon loading of the DPF is larger than a preset threshold value, acquiring a preset first regeneration temperature value and a preset second regeneration temperature value; wherein the second regeneration temperature value is greater than the first regeneration temperature value; and when the urea in the current urea box is in a unfreezing state, removing the carbon deposit in the DPF in a passive regeneration mode according to a first regeneration temperature value. Because this application is through judging the state of the urea in the current urea case, select lower temperature value and passive regeneration mode to control DPF to regenerate when urea is in the state of unfreezing to ensured that the urea nozzle is not burnt, promoted the operating efficiency of vehicle simultaneously.

Description

DPF regeneration control method and device, storage medium and vehicle-mounted computer
Technical Field
The invention relates to the technical field of engine emission, in particular to a DPF regeneration control method, a DPF regeneration control device, a DPF regeneration control storage medium and a vehicle-mounted computer.
Background
As is well known, the freezing point of a urea aqueous solution is-11 ℃, and the urea aqueous solution can be completely frozen in an environment lower than the freezing point, so that an SCR system cannot normally spray urea, the emission of nitrogen oxides of an engine cannot be effectively controlled, and serious atmospheric pollution is caused.
At present, in order to solve the problem, a urea storage unit and a corresponding pipeline are heated and insulated, and after a vehicle stops running for a long time and exceeds one night, an ECU judges the temperature of a urea box and the ambient temperature by itself when starting the vehicle the next day, and unfreezes. Freezing the urea solution for 72 hours at the temperature of-18 ℃ to ensure that a urea box is completely frozen, starting an engine to operate in an idling mode for 20 minutes in situ, then operating for no more than 50 minutes at a load of no more than 40%, and if the urea can be normally sprayed, indicating that a urea heating and thawing system meets the requirements. The urea can not be thawed normally in the urea injection system in the actual use process of the whole vehicle, the condition of regeneration triggering can be caused when the actual carbon loading capacity of the whole vehicle reaches the regeneration carbon loading capacity triggering limit value, the regeneration temperature is high, and when the urea nozzle does not inject the urea, the thermal damage fault of the urea nozzle can be caused, so that the vehicle operation efficiency is reduced.
Disclosure of Invention
The embodiment of the application provides a DPF regeneration control method, a DPF regeneration control device, a storage medium and a vehicle-mounted computer. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
In a first aspect, an embodiment of the present application provides a DPF regeneration control method, including:
when the actual carbon loading of the DPF is larger than a preset threshold value, acquiring a preset first regeneration temperature value and a preset second regeneration temperature value; wherein the second regeneration temperature value is greater than the first regeneration temperature value;
and when the urea in the current urea box is in a unfreezing state, removing the carbon deposit in the DPF in a passive regeneration mode according to a first regeneration temperature value.
Optionally, the method further comprises:
and when the urea in the current urea box is not in a unfreezing state, removing the carbon deposit in the DPF by adopting an active regeneration mode according to the second regeneration temperature value.
Optionally, when the actual carbon loading of the current DPF is greater than the preset threshold, before acquiring the preset first regeneration temperature value and the second regeneration temperature value, the method further includes:
reading the temperature of the urea box and the ambient temperature;
judging whether urea in the urea box is in a unfreezing state or not according to the temperature of the urea box and the ambient temperature;
the current DPF actual carbon loading is monitored.
Optionally, whether urea in the urea tank is in a unfreezing state or not is judged according to the temperature of the urea tank and the ambient temperature, and the method includes the following steps:
when the temperature of the urea box and the ambient temperature are lower than preset temperature values, determining that the urea in the urea box is in a unfreezing state at present;
or,
and when the temperature of the urea box and the ambient temperature are greater than or equal to preset temperature values, determining that the urea in the urea box is in a unfreezing state currently.
Optionally, removing soot in the DPF by using a passive regeneration method according to the first regeneration temperature value, including:
controlling the current temperature in the DPF to be a first regeneration temperature value;
and controlling the current carbon deposit in the DPF to react with nitrogen dioxide in the first regeneration temperature value so as to remove the carbon deposit in the DPF.
Optionally, removing soot in the DPF by using an active regeneration mode according to the second regeneration temperature value, including:
controlling the current temperature in the DPF to be a second regeneration temperature value;
and controlling the reaction of the carbon deposit in the DPF with oxygen at the current time in the second regeneration temperature value so as to remove the carbon deposit in the DPF.
Optionally, the first regeneration temperature value is 300 ℃; the second regeneration temperature value is any value within the range of 550-600 ℃.
In a second aspect, an embodiment of the present application provides a DPF regeneration control apparatus, including:
the temperature acquisition module is used for acquiring a preset first regeneration temperature value and a preset second regeneration temperature value when the actual carbon loading capacity of the DPF is greater than a preset threshold value; wherein the second regeneration temperature value is greater than the first regeneration temperature value;
and the carbon deposit regeneration module is used for removing the carbon deposit in the DPF in a passive regeneration mode according to the first regeneration temperature value when the urea in the urea box is in a unfreezing state.
In a third aspect, embodiments of the present application provide a computer storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform the above-mentioned method steps.
In a fourth aspect, an embodiment of the present application provides an in-vehicle computer, which may include: a processor and a memory; wherein the memory stores a computer program adapted to be loaded by the processor and to perform the above-mentioned method steps.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
in the embodiment of the application, when the actual carbon loading capacity of the DPF is larger than a preset threshold value, the DPF regeneration control device acquires a preset first regeneration temperature value and a preset second regeneration temperature value; and then removing carbon deposition in the DPF in a passive regeneration mode according to the first regeneration temperature value when the urea in the current urea box is in a unfreezing state. Because this application is through judging the state of the urea in the current urea case, select lower temperature value and passive regeneration mode to control DPF to regenerate when urea is in the state of unfreezing to ensured the urea nozzle and not burnt out, promoted the operating efficiency of vehicle simultaneously.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic flow chart diagram of a DPF regeneration control method provided by an embodiment of the present application;
FIG. 2 is a schematic diagram of electrical control logic for DPF regeneration control provided by an embodiment of the present application;
fig. 3 is a schematic structural diagram of a DPF regeneration control apparatus according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a vehicle-mounted computer according to an embodiment of the present application.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the claims that follow.
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, a and/or B, which may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The application provides a DPF regeneration control method, a DPF regeneration control device, a storage medium and a vehicle-mounted computer, which aim to solve the problems in the related art. In the technical scheme that this application provided, because this application is through judging the state of the urea in the current urea case, select lower temperature value and passive regeneration mode to control DPF and regenerate when urea is in the state of unfreezing to ensured that the urea nozzle is not burnt out, promoted the operating efficiency of vehicle simultaneously, adopt the exemplary embodiment to carry out the detailed description below.
The DPF regeneration control method according to the embodiment of the present application will be described in detail with reference to fig. 1 to 2. The method may be implemented in dependence on a computer program, operable on a DPF regeneration control device based on the von neumann architecture. The computer program may be integrated into the application or may run as a separate tool-like application.
Referring to fig. 1, a flow chart of a DPF regeneration control method according to an embodiment of the present application is schematically shown.
As shown in fig. 1, the method of the embodiment of the present application may include the steps of:
s101, when the actual carbon loading of the DPF is larger than a preset threshold value, acquiring a preset first regeneration temperature value and a preset second regeneration temperature value; wherein the second regeneration temperature value is greater than the first regeneration temperature value;
the DPF is an abbreviation of a diesel particulate trap, and is similar to a honeycomb carrier structure for filtering and removing particles in airflow, the airflow flows in from one end of a channel and is blocked at the other end of the channel, exhaust gas is forced to penetrate through a wall flow to enter an adjacent pore channel when passing through the channel, and the particles cannot pass through the channel and are deposited to form accumulated soot.
In the embodiment of the application, before determining the actual carbon loading capacity of the current DPF, the temperature of the urea tank and the ambient temperature need to be read, then whether urea in the urea tank is in a unfreezing state or not is judged according to the temperature of the urea tank and the ambient temperature, and finally the actual carbon loading capacity of the current DPF is monitored.
Further, when judging whether the urea in the urea box is in a unfreezing state or not, when the temperature of the urea box and the ambient temperature are smaller than a preset temperature value, determining that the urea in the urea box is in the unfreezing state at present; or when the temperature of the urea box and the ambient temperature are greater than or equal to the preset temperature value, determining that the urea in the urea box is in a unfreezing state currently.
It should be noted that the unfreezing state indicates that the urea in the urea tank is still frozen, and the unfreezing is currently performed. Being not in a thawed state indicates that the urea in the urea tank has been thawed.
Specifically, the first regeneration temperature value may be a regeneration temperature value based on a thawing state, and the second regeneration temperature value may be a normal regeneration temperature, that is, a regeneration temperature value based on completion of thawing.
Specifically, the first regeneration temperature value is 300 ℃; the second regeneration temperature value is any value within the range of 550-600 ℃.
S102, when the urea in the urea box is in a unfreezing state, removing carbon deposition in the DPF by adopting a passive regeneration mode according to a first regeneration temperature value.
In a possible implementation mode, when the urea in the urea box is in a unfreezing state, the carbon deposit in the DPF is removed by adopting a passive regeneration mode according to a first regeneration temperature value.
Specifically, the current temperature in the DPF is controlled to be a first regeneration temperature value, and then the reaction between carbon deposition in the DPF and nitrogen dioxide is controlled in the first regeneration temperature value so as to remove the carbon deposition in the DPF.
In another possible implementation manner, when the urea in the urea box is not in a unfreezing state, the carbon deposit in the DPF is removed by adopting an active regeneration manner according to the second regeneration temperature value.
Specifically, the current temperature in the DPF is controlled to be a second regeneration temperature value, and then the reaction of carbon deposition in the DPF with oxygen is controlled in the second regeneration temperature value so as to remove the carbon deposition in the DPF.
For example, as shown in fig. 2, fig. 2 is an electric control logic diagram provided in the embodiment of the present application, and first, the regeneration temperature setting value is set to a normal regeneration temperature value (second regeneration temperature value) and a regeneration temperature value based on a urea thawing state (first regeneration temperature value), respectively. After the vehicle is powered on and started, the vehicle-mounted computer ECU judges whether urea is in a unfreezing state or not by reading the temperature of the urea box and the ambient temperature, if the urea is in the unfreezing state, the regeneration temperature is a temperature set value (a first regeneration temperature value) based on the unfreezing state of the urea when the ECU monitors that the actual carbon loading amount reaches a regeneration carbon loading amount set value, in order to prevent the overheating effect of regeneration high temperature on a urea nozzle, the regeneration temperature value of the first regeneration temperature value is set to be a smaller value, carbon deposition is reduced in a passive regeneration mode, and after the ECU judges that the urea injection system is unfrozen, the regeneration temperature set value is jumped to a normal temperature set value (a second regeneration temperature value), and regeneration is completed in an active regeneration mode.
In the embodiment of the application, when the actual carbon loading of the current DPF is greater than a preset threshold value, the DPF regeneration control device acquires a preset first regeneration temperature value and a preset second regeneration temperature value; and then removing carbon deposition in the DPF in a passive regeneration mode according to the first regeneration temperature value when the urea in the current urea box is in a unfreezing state. Because this application is through judging the state of the urea in the current urea case, select lower temperature value and passive regeneration mode to control DPF to regenerate when urea is in the state of unfreezing to ensured the urea nozzle and not burnt out, promoted the operating efficiency of vehicle simultaneously.
The following are embodiments of the apparatus of the present invention that may be used to perform embodiments of the method of the present invention. For details which are not disclosed in the embodiments of the apparatus of the present invention, reference is made to the embodiments of the method of the present invention.
Referring to fig. 3, a schematic structural diagram of a DPF regeneration control apparatus according to an exemplary embodiment of the present invention is shown. The DPF regeneration control device may be implemented as all or a part of an on-vehicle computer by software, hardware, or a combination of both. The device 1 comprises a temperature acquisition module 10 and a carbon deposit regeneration module 20.
The temperature acquisition module 10 is used for acquiring a preset first regeneration temperature value and a preset second regeneration temperature value when the actual carbon loading capacity of the DPF is greater than a preset threshold value; wherein the second regeneration temperature value is greater than the first regeneration temperature value;
and the carbon deposit regeneration module 20 is used for removing the carbon deposit in the DPF in a passive regeneration mode according to the first regeneration temperature value when the urea in the current urea box is in a unfreezing state.
It should be noted that, when the DPF regeneration control apparatus provided in the above embodiment executes the DPF regeneration control method, only the division of the above functional modules is exemplified, and in practical applications, the functions may be distributed to different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the functions described above. In addition, the DPF regeneration control device provided in the above embodiment and the DPF regeneration control method embodiment belong to the same concept, and details of the implementation process thereof are shown in the method embodiment, which are not described herein again.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
In the embodiment of the application, when the actual carbon loading of the current DPF is greater than a preset threshold value, the DPF regeneration control device acquires a preset first regeneration temperature value and a preset second regeneration temperature value; and then removing carbon deposition in the DPF in a passive regeneration mode according to the first regeneration temperature value when the urea in the current urea box is in a unfreezing state. Because this application is through judging the state of the urea in the current urea case, select lower temperature value and passive regeneration mode to control DPF to regenerate when urea is in the state of unfreezing to ensured the urea nozzle and not burnt out, promoted the operating efficiency of vehicle simultaneously.
The present invention also provides a computer readable medium having stored thereon program instructions that, when executed by a processor, implement the DPF regeneration control method provided by the various method embodiments described above.
The present invention also provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the DPF regeneration control method of the various method embodiments described above.
Please refer to fig. 4, which provides a schematic structural diagram of a vehicle-mounted computer according to an embodiment of the present disclosure. As shown in fig. 4, the in-vehicle computer 1000 may include: at least one processor 1001, at least one network interface 1004, a user interface 1003, memory 1005, at least one communication bus 1002.
Wherein a communication bus 1002 is used to enable connective communication between these components.
The user interface 1003 may include a Display screen (Display) and a Camera (Camera), and the optional user interface 1003 may also include a standard wired interface and a wireless interface.
The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), among others.
Processor 1001 may include one or more processing cores, among other things. The processor 1001 interfaces various components throughout the electronic device 1000 using various interfaces and lines to perform various functions of the electronic device 1000 and to process data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 1005 and invoking data stored in the memory 1005. Alternatively, the processor 1001 may be implemented in at least one hardware form of Digital Signal Processing (DSP), field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The processor 1001 may integrate one or a combination of a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a modem, and the like. Wherein, the CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for rendering and drawing the content required to be displayed by the display screen; the modem is used to handle wireless communications. It is understood that the modem may not be integrated into the processor 1001, but may be implemented by a single chip.
The Memory 1005 may include a Random Access Memory (RAM) or a Read-Only Memory (Read-Only Memory). Optionally, the memory 1005 includes a non-transitory computer-readable medium. The memory 1005 may be used to store an instruction, a program, code, a set of codes, or a set of instructions. The memory 1005 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the various method embodiments described above, and the like; the storage data area may store data and the like referred to in the above respective method embodiments. The memory 1005 may optionally be at least one memory device located remotely from the processor 1001. As shown in fig. 4, the memory 1005, which is a type of computer storage medium, may include an operating system, a network communication module, a user interface module, and a DPF regeneration control application program therein.
In the vehicle-mounted computer 1000 shown in fig. 4, the user interface 1003 is mainly used for providing an input interface for a user to obtain data input by the user; and the processor 1001 may be configured to invoke the DPF regeneration control application stored in the memory 1005 and specifically perform the following operations:
when the actual carbon loading of the current DPF is larger than a preset threshold value, acquiring a preset first regeneration temperature value and a preset second regeneration temperature value; wherein the second regeneration temperature value is greater than the first regeneration temperature value;
and when the urea in the current urea box is in a unfreezing state, removing the carbon deposit in the DPF in a passive regeneration mode according to a first regeneration temperature value.
In one embodiment, the processor 1001 also performs the following operations:
and when the urea in the current urea box is not in a unfreezing state, removing the carbon deposit in the DPF by adopting an active regeneration mode according to the second regeneration temperature value.
In one embodiment, when the following operations are performed before the preset first regeneration temperature value and the second regeneration temperature value are obtained when the current DPF actual carbon loading is greater than the preset threshold value:
reading the temperature of a urea box and the ambient temperature;
judging whether urea in the urea box is in a unfreezing state or not according to the temperature of the urea box and the ambient temperature;
the current DPF actual carbon loading is monitored.
In one embodiment, when determining whether the urea in the urea tank is in the unfreezing state according to the urea tank temperature and the ambient temperature, the processor 1001 specifically performs the following operations:
when the temperature of the urea box and the ambient temperature are lower than preset temperature values, determining that the urea in the urea box is in a unfreezing state at present;
or,
and when the temperature of the urea box and the ambient temperature are greater than or equal to the preset temperature value, determining that the urea in the urea box is in a unfreezing state currently.
In one embodiment, when the processor 1001 performs the following operations in the passive regeneration mode to remove soot in the DPF according to the first regeneration temperature value:
controlling the current temperature in the DPF to be a first regeneration temperature value;
and controlling the current carbon deposit in the DPF to react with nitrogen dioxide in the first regeneration temperature value so as to remove the carbon deposit in the DPF.
In one embodiment, when the processor 1001 performs the following operation in removing soot in the DPF by using the active regeneration mode according to the second regeneration temperature value:
controlling the current temperature in the DPF to be a second regeneration temperature value;
and controlling the reaction of the carbon deposit in the DPF with oxygen in the second regeneration temperature value so as to remove the carbon deposit in the DPF.
In the embodiment of the application, when the actual carbon loading of the current DPF is greater than a preset threshold value, the DPF regeneration control device acquires a preset first regeneration temperature value and a preset second regeneration temperature value; and then removing carbon deposition in the DPF in a passive regeneration mode according to the first regeneration temperature value when the urea in the current urea box is in a unfreezing state. Because this application is through judging the state of the urea in the current urea case, select lower temperature value and passive regeneration mode to control DPF to regenerate when urea is in the state of unfreezing to ensured that the urea nozzle is not burnt, promoted the operating efficiency of vehicle simultaneously.
It will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by a computer program to instruct associated hardware to perform the methods, and that the program for DPF regeneration control may be stored in a computer readable storage medium, and when executed, may include the processes of the embodiments of the methods as described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory or a random access memory.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and should not be taken as limiting the scope of the present application, so that the present application will be covered by the appended claims.

Claims (9)

1. A DPF regeneration control method, the method comprising:
when the actual carbon loading of the DPF is larger than a preset threshold value, acquiring a preset first regeneration temperature value and a preset second regeneration temperature value; wherein the second regeneration temperature value is greater than the first regeneration temperature value;
when the urea in the current urea box is in a unfreezing state, controlling the current temperature value in the DPF to be a first regeneration temperature value, and removing the carbon deposit in the DPF by adopting a passive regeneration mode;
and when the urea in the current urea box is not in a unfreezing state, controlling the current temperature value in the DPF to be a second regeneration temperature value, and removing the carbon deposit in the DPF in an active regeneration mode.
2. The method of claim 1, wherein before obtaining the preset first and second regeneration temperature values when the current DPF actual carbon loading is greater than the preset threshold, further comprising:
reading the temperature of a urea box and the ambient temperature;
judging whether urea in the urea box is in a unfreezing state or not according to the temperature of the urea box and the ambient temperature;
the current DPF actual carbon loading is monitored.
3. The method of claim 2, wherein determining whether urea in a urea tank is in a thawed state based on the urea tank temperature and an ambient temperature comprises:
when the temperature of the urea box and the ambient temperature are smaller than a preset temperature value, determining that the urea in the current urea box is not in a unfreezing state;
or,
and when the temperature of the urea box and the ambient temperature are more than or equal to preset temperature values, determining that the urea in the current urea box is in a unfreezing state.
4. The method according to claim 1, wherein the removing soot in the DPF by passive regeneration according to the first regeneration temperature value comprises:
controlling the temperature in the current DPF to the first regeneration temperature value;
and controlling the carbon deposit in the current DPF to react with nitrogen dioxide in the first regeneration temperature value so as to remove the carbon deposit in the DPF.
5. The method according to claim 1, wherein the removing soot in the DPF by active regeneration according to the second regeneration temperature value comprises:
controlling the temperature in the current DPF to be the second regeneration temperature value;
and controlling the reaction of carbon deposit in the current DPF with oxygen in the second regeneration temperature value so as to remove the carbon deposit in the DPF.
6. The method according to claim 4 or 5, characterized in that said first regeneration temperature value is 300 ℃; the second regeneration temperature value is any value within the range of 550-600 ℃.
7. A DPF regeneration control apparatus, comprising:
the temperature acquisition module is used for acquiring a preset first regeneration temperature value and a preset second regeneration temperature value when the actual carbon loading of the DPF is greater than a preset threshold value; wherein the second regeneration temperature value is greater than the first regeneration temperature value;
the carbon deposit regeneration module is used for controlling the current temperature value in the DPF to be a first regeneration temperature value when the urea in the current urea box is in a unfreezing state, and removing the carbon deposit in the DPF in a passive regeneration mode;
wherein the apparatus is further specifically configured to:
and when the urea in the current urea box is not in a unfreezing state, controlling the current temperature value in the DPF to be a second regeneration temperature value, and removing the carbon deposit in the DPF in an active regeneration mode.
8. A computer storage medium having stored thereon a plurality of instructions adapted to be loaded by a processor and to perform the method according to any of claims 1-6.
9. An in-vehicle computer, comprising: a processor and a memory; wherein the memory stores a computer program adapted to be loaded by the processor and to perform the method according to any of claims 1-6.
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